WO2015183056A1 - 폴리이미드계 용액 및 이를 이용하여 제조된 폴리이미드계 필름 - Google Patents
폴리이미드계 용액 및 이를 이용하여 제조된 폴리이미드계 필름 Download PDFInfo
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- C08G73/1003—Preparatory processes
- C08G73/1007—Preparatory processes from tetracarboxylic acids or derivatives and diamines
- C08G73/1028—Preparatory processes from tetracarboxylic acids or derivatives and diamines characterised by the process itself, e.g. steps, continuous
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- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08G73/1046—Polyimides containing oxygen in the form of ether bonds in the main chain
- C08G73/1053—Polyimides containing oxygen in the form of ether bonds in the main chain with oxygen only in the tetracarboxylic moiety
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- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08G73/1067—Wholly aromatic polyimides, i.e. having both tetracarboxylic and diamino moieties aromatically bound
- C08G73/1071—Wholly aromatic polyimides containing oxygen in the form of ether bonds in the main chain
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- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08G73/1075—Partially aromatic polyimides
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- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
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- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/133305—Flexible substrates, e.g. plastics, organic film
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- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
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- C08J2379/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen, or carbon only, not provided for in groups C08J2361/00 - C08J2377/00
- C08J2379/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
- C08J2379/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
Definitions
- the present invention relates to a polyimide-based solution capable of producing an isotropic transparent polyimide-based film having excellent mechanical properties with high heat resistance.
- TFT thin film transistor
- the process temperature may vary depending on the type of semiconductor layer, insulating film, and barrier layer included in the device in manufacturing the flexible device, a temperature of about 300 to 500 ° C. is usually required in the TFT process.
- polymer materials that can withstand such process temperatures are extremely limited, and polyimides, which are known to be excellent in heat resistance, are mainly used.
- a flexible device is normally manufactured by apply
- the room temperature storage stability of the polyimide precursor is particularly important. If the storage stability of the polyimide precursor is poor, the process viscosity will change, resulting in unstable application and curing of the polyimide substrate material.
- polyamic acid which is a polyimide precursor, is known to have poor storage stability because a carboxylic acid promoting hydrolysis is adjacent to an amide bond.
- a flexible device with a high temperature process is required for heat resistance at high temperatures, especially in the case of an organic light emitting diode (OLED) device using a low temperature polysilane (LTPS) process, the process temperature is close to 500 °C.
- OLED organic light emitting diode
- LTPS low temperature polysilane
- An object of the present invention is to provide a polyimide-based solution capable of providing an isotropic transparent polyimide-based film having high heat resistance and excellent mechanical properties.
- Another object of the present invention is to provide a film produced using the polyimide-based solution.
- Still another object of the present invention is to provide a device including a substrate manufactured using the polyimide film.
- Polyimide-based solution according to an aspect of the present invention It comprises a precursor of a polyimide having a structure of formula (1) or a polyamic acid of the formula (2) and a solvent, after coating on a substrate and left for 30 minutes at 30 °C, 70% humidity is less than 1% haze.
- X is a tetravalent organic group derived from an acid dianhydride
- Y is a divalent organic group derived from diamine.
- the solvent may have a positive distribution coefficient (LogP value) at 25 °C.
- the divalent organic group or tetravalent organic group may each independently be a divalent organic group or a tetravalent organic group selected from aromatic, alicyclic, aliphatic and combinations thereof.
- the X comprises a tetravalent organic group having a fluoro atom-containing substituent
- the Y comprises a divalent organic group having a fluoro atom-containing substituent, or wherein both X and Y are fluoro atoms It may include an organic group having a containing substituent.
- the polyimide or polyamic acid may include a structure wherein the Y is a divalent organic group having a fluoro atom-containing substituent, and a structure that is a divalent organic group without a fluoro atom-containing substituent. .
- the molar ratio of the divalent organic group having a fluoro substituent relative to the total number of moles of the divalent organic group Y may be about 0.1 to 1.
- the Y may be a monocyclic or polycyclic aromatic, monocyclic or polycyclic alicyclic, or two or more thereof may include a divalent organic group having a structure connected by a single bond or a linking group.
- the divalent organic group having the fluoro atom-containing substituent is a monocyclic or polycyclic aromatic, monocyclic or polycyclic alicyclic, or a divalent organic group having a structure in which two or more thereof are connected by a single bond or a linking group. It may be a structure in which the fluoro atom-containing substituent is directly substituted with the aromatic or alicyclic ring or substituted with the linking group.
- the divalent organic group having a fluoro atom-containing substituent is 2,2'-bis (trifluoromethyl) -benzidine (2,2'-bis (trifluoromethyl) benzidine) or 2,2-bis It may be a divalent organic group derived from [4-(-aminophenoxy) phenyl] hexafluoropropane (2,2-Bis [4-(-aminophenoxy) phenyl] hexafluoropropane).
- the divalent organic group that does not have a fluoro atom-containing substituent that does not have a fluoro atom-containing substituent
- It may be derived from a compound selected from para-phenylenediamine, meta-phenylenediamine, and mixtures thereof.
- the polyimide or polyamic acid may include a structure wherein the X is a tetravalent organic group having a fluoro atom-containing substituent, and a structure that is a tetravalent organic group without a fluoro atom-containing substituent. .
- the molar ratio of the tetravalent organic group having a fluoro substituent to the total number of moles of the tetravalent organic group X may be about 0.1 to 1.
- the X may be a monocyclic or polycyclic aromatic, monocyclic or polycyclic alicyclic, or two or more thereof may include a tetravalent organic group having a structure connected by a single bond or a linking group.
- the tetravalent organic group which has the said fluoro atom containing substituent is a monovalent or polycyclic aromatic, monocyclic or polycyclic alicyclic, or a tetravalent organic group which has a structure in which two or more of these are connected by the single bond or the linking group. It may be a structure in which the fluoro atom-containing substituent is directly substituted with the aromatic or alicyclic ring or substituted with the linking group.
- the tetravalent organic group having a fluoro atom-containing substituent may be 4,4 ′-(hexafluoroisopropylidene) diphthalic anhydride (4,4 ′-(Hexafluoroisopropylidene) diphthalic anhydride).
- a tetravalent organic group having no fluoro atom containing substituents having no fluoro atom containing substituents
- the polyimide solution may have a viscosity measured at 25 ° C. with a Brookfield rotational viscometer of about 400 cP or more and about 50,000 cP or less.
- This invention also provides the polyimide film obtained by apply
- the film may have a glass transition temperature of at least 250 ° C. of polyimide and a transmittance of about 85% or more for light having a wavelength of 380 to 760 nm in a film thickness range of 10 to 30 ⁇ m.
- the film may have a coefficient of thermal expansion (CTE) of about 70 ppm / K or less at 250 ° C.
- CTE coefficient of thermal expansion
- the film according to the embodiment may have an in-plane retardation value R in of about 0.01 to about 1 nm and a retardation value R th in the thickness direction of about 100 nm or less.
- the film according to another embodiment may have a phase difference value R th in a thickness direction of about 100 nm or more.
- the film according to an embodiment may have a yellowness (YI) of about 9 or less, and a modulus of about 1 GPa or more.
- the present invention also provides a display substrate comprising the polyimide film described above.
- the present invention also provides an element comprising the polyimide film described above.
- the polyimide-based solution according to the present invention it is possible to produce a polyimide film having high transparency and high heat resistance and excellent mechanical properties.
- the polyimide film is useful as a substrate in a solar cell, an organic light emitting diode, a semiconductor device, or a flexible display device.
- Example 1 is a photograph of the clouding phenomenon of the polyimide-based solution prepared in Example 1-1 and Comparative Examples 1-1 to 1-4.
- Figure 2 is a photograph of the clouding phenomenon of the polyimide-based solution prepared in Example 3-1.
- Figure 3 is a photograph of the clouding phenomenon of the polyimide-based solution prepared in Comparative Example 3-1.
- substituted means that at least one hydrogen contained in the compound or the functional group is a halogen atom, an alkyl group having 1 to 10 carbon atoms, a halogenated alkyl group, a cycloalkyl group having 3 to 30 carbon atoms, an aryl group having 6 to 30 carbon atoms, and a hydroxyl group. And substituted with a substituent selected from the group consisting of alkoxy groups, carboxylic acid groups, aldehyde groups, epoxy groups, cyano groups, nitro groups, amino groups, sulfonic acid groups and derivatives thereof having 1 to 10 carbon atoms.
- a single bond, a double bond, a triple bond, an alkylene group having 1 to 10 carbon atoms for example, methylene group (-CH 2- ), an ethylene group (-CH 2 CH 2 -), etc.
- 'isotropic' means that the phase difference value R th in the thickness direction is about 100 nm or less
- 'anisotropic' or 'anisotropy' means that the phase difference value R th in the thickness direction is about 100 nm or more.
- the polyimide-based solution is meant to include a polyimide precursor solution, a polyamic acid solution, or a mixture thereof.
- Polyimide precursors include, but are not limited to, polyamic acid and include without limitation those which can be converted to polyimides by subsequent processes.
- the present invention comprises a precursor of a polyimide having a structure of the formula (1) or a polyamic acid of the formula (2) and a solvent, after coating on a substrate and left for 30 minutes at 30 °C, 70% humidity after the haze is 1% or less It relates to a polyimide solution.
- X is a tetravalent organic group derived from an acid dianhydride
- Y comprises a divalent organic group derived from diamine.
- the solvent may have a positive distribution coefficient (LogP value) at 25 °C. More specifically, the distribution coefficient LogP value may be about 0.01 to 3, or about 0.01 to 2, or about 0.01 to 1, or about 0.01 to 0.1.
- the distribution coefficient can be calculated using ACD / LogP module of ACD / Percepta platform of ACD / Labs, and ACD / LogP module uses QSPR (Quantitative Structure-Property Relationship) methodology based algorithm using molecular 2D structure. I use it.
- QSPR Quadrature Structure-Property Relationship
- the partition coefficient value is positive, it means that the polarity of the solvent is hydrophobic.
- a polyimide precursor solution is prepared using a specific solvent having a positive partition coefficient value, and a polyimide film is prepared using the same. It was found that an isotropic film having high heat resistance and mechanical properties with excellent transparency can be obtained.
- the solvent may be a tertiary amine substituted with an alkyl group having 2 or more carbon atoms, more preferably a tertiary amine having two or more alkyl groups having 2 to 6 carbon atoms. More specifically, for example, N, N-diethylacetamide, N, N-diethylformamide or a mixture thereof may be included. Most preferably, N, N-diethylformamide is included.
- the polyimide solution according to the present invention has a haze of 1% or less after 30 minutes at 30 ° C. and 70% humidity after coating on a glass substrate, when using a conventionally used solvent.
- the clouding phenomenon can be excellently improved.
- the acid dianhydride usable in the preparation of the polyimide of Formula 1 or polyamic acid of Formula 2 may be an acid dianhydride comprising functional group X in Formula 1 or Formula 2, and the diamine may be a diamine comprising functional group Y have.
- the divalent organic group or the tetravalent organic group may each independently be a divalent organic group or a tetravalent organic group selected from aromatic, alicyclic, aliphatic, and combinations thereof.
- aromatic refers to a monocyclic or polycyclic compound having 6 to 30 carbon atoms having a structure sharing intramolecular unlocalized electrons. Preferably it refers to a monocyclic or polycyclic compound having 6 to 18 carbon atoms.
- Alcyclic is a ring compound that is not aromatic, and refers to a monocyclic or polycyclic ring compound having 3 to 30 carbon atoms. Preferably it refers to a monocyclic or polycyclic cyclic compound having 3 to 18 carbon atoms or 3 to 12 carbon atoms.
- 'aliphatic' refers to a straight or branched hydrocarbon compound excluding an aromatic or alicyclic compound, and refers to a hydrocarbon compound having 1 to 30 carbon atoms, or 1 to 20 carbon atoms, or 1 to 10 carbon atoms.
- the X comprises a divalent organic group having a fluoro atom-containing substituent
- the Y comprises a tetravalent organic group having a fluoro atom-containing substituent, or wherein both X and Y are fluoro atoms It may include an organic group having a containing substituent.
- At least one selected from X and Y in Formula 1 or 2 may have a substituent containing a fluoro atom, and the number of moles of the divalent organic group or tetravalent organic group having a fluoro atom containing substituent is divalent. 50 to 70 moles based on the total number of moles of the organic group and the tetravalent organic group.
- the 'substituent having a fluoro atom' or the 'fluoro substituent' means both a 'fluoro atom substituent' as well as a 'substituent containing a fluoro atom' and is mixed with the term 'fluoro atom-containing substituent'.
- it may be a fluoro alkyl group having 1 to 10 carbon atoms or 1 to 6 carbon atoms.
- the polyimide or polyamic acid may include a structure wherein the X is a tetravalent organic group having a fluoro atom-containing substituent, and a structure that is a tetravalent organic group without a fluoro atom-containing substituent.
- the molar ratio of the tetravalent organic group having a fluoro substituent to the total number of moles of the tetravalent organic group X may be about 0.1 to about 0.9.
- the X may be a monocyclic or polycyclic aromatic, monocyclic or polycyclic alicyclic, or two or more thereof may include a tetravalent organic group having a structure connected by a single bond or a linking group.
- the tetravalent organic group which has the said fluoro atom containing substituent is a monovalent or polycyclic aromatic, monocyclic or polycyclic alicyclic, or a tetravalent organic group which has a structure in which two or more of these are connected by the single bond or the linking group. It may be a structure in which the fluoro atom-containing substituent is directly substituted with the aromatic or alicyclic ring or substituted with the linking group.
- the type of linking group is the same as described above, and means a linking group which may have a substituent.
- the tetravalent organic group (X) is specifically an aromatic tetravalent organic group represented by the following formulas (2a) to (2d); Alicyclic tetravalent organic group containing a structure of a cycloalkane having 3 to 12 carbon atoms; An alicyclic tetravalent organic group of formula (2e); It may be selected from the group consisting of aliphatic tetravalent organic groups having a branched alkane structure having 1 to 10 carbon atoms and combinations thereof:
- R 11 to R 17 may each independently be an alkyl group having 1 to 10 carbon atoms or a fluoroalkyl group having 1 to 10 carbon atoms,
- a 1 is an integer of 0 or 2
- a 2 is an integer of 0 to 4
- a 3 is an integer of 0 to 8
- a 4 and a 5 are each independently an integer of 0 to 3
- a 6 and a 9 are each Independently an integer from 0 to 3
- a 7 and a 8 may each independently be an integer from 0 to 9, and
- the tetravalent organic group (X) may be a tetravalent organic group, such as the following Formulas 3a to 3t, or Formulas 4a to 4l, but is not limited thereto:
- x is an integer of 1 to 3.
- the tetravalent organic groups of Formulas 3a to 3t may be substituted with a substituent by one or more hydrogen atoms present in the tetravalent organic group or an alkyl group having 1 to 10 carbon atoms or a fluoroalkyl group having 1 to 10 carbon atoms.
- the tetravalent organic groups of the formulas 4a to 4l may be substituted with a substituent by one or more hydrogen atoms present in the tetravalent organic group or an alkyl group having 1 to 10 carbon atoms or a fluoroalkyl group having 1 to 10 carbon atoms.
- aromatic dianhydride More preferably, aromatic dianhydride which has a substituent which has a fluoro atom. Aromatic dianhydrides maintain the transparency of the resulting polyimide and at the same time retain excellent oxidation resistance at high temperatures.
- dianhydrides having substituents with fluoro atoms and dianhydrides without fluoro atoms may be used in a ratio of 3: 7 to 7: 3, but is not limited thereto.
- the tetravalent organic group having a fluoro atom-containing substituent may be 4,4′-hexafluoroisopropylidene) diphthalic anhydride (4,4 ′-(Hexafluoroisopropylidene) diphthalic anhydride).
- a tetravalent organic group having no fluoro atom containing substituents having no fluoro atom containing substituents
- the diamine-based compound usable in the preparation of the polyimide may be a compound including two amino groups bonded to Y together with the functional group Y in Chemical Formula 1 or 2.
- Y is an aliphatic, alicyclic or aromatic divalent organic group derived from a diamine-based compound, or a combination thereof, and an aliphatic, alicyclic or aromatic divalent organic group is directly connected, or It may be a divalent organic group connected to each other via a crosslinked structure.
- the Y may be a monocyclic or polycyclic aromatic, monocyclic or polycyclic alicyclic, or two or more thereof may include a divalent organic group having a structure connected by a single bond or a linking group.
- the diamine may be 4,4'-diaminodiphenyl ether, 4,4'-diaminodiphenyl sulfide, 4,4'-diaminodiphenyl sulfone, 4,4'-diaminobenzophenone, Bis [4- (4-aminophenoxy) phenyl] methane, 2,2-bis [4- (4-aminophenoxy) phenyl] propane, 2,2-bis [4- (4-aminophenoxy) phenyl ] -1,1,1,3,3,3-hexafluoropropane, 1,3-bis (4-aminophenoxy) benzene, 4,4'-bis (4-aminophenoxy) biphenyl, bis [4- (4-aminophenoxy) phenyl] ketone, bis [4- (4-aminophenoxy) phenyl] sulfoxide, bis [4- (4-aminophenoxy) phenyl] sulfox
- the diamine which has an aromatic group among the above-mentioned diamine is preferable.
- diamines having substituents with fluoro atoms may be preferred, especially when acid dianhydrides do not have fluoro substituents.
- the substituent having a fluoro atom is the same as described above, and preferably is fluoro alkyl having 1 to 10 carbon atoms, or fluoro alkyl having 1 to 6 carbon atoms.
- Diamines having fluoro atoms as substituents contribute to improving the transparency of the resulting polyimide film, and substituents without fluoro atoms can contribute to improving chemical resistance, heat resistance and mechanical strength of the polyimide film.
- the polyimide or polyamic acid may include a structure wherein the Y is a divalent organic group having a fluoro atom-containing substituent, and a structure that is a divalent organic group without a fluoro atom-containing substituent.
- the molar ratio of the divalent organic group having a fluoro substituent to the total number of moles of the divalent organic group Y may be about 0.1 to about 0.9.
- diamines having substituents with fluoro atoms and diamines without fluoro atoms it is also possible to use together diamines having substituents with fluoro atoms and diamines without fluoro atoms, and when using them together in a molar ratio of 1: 9 to 9: 1, or 2: 8 to 8: 2, Or 3: 7 to 7: 3, but is not limited thereto.
- the divalent organic group having the fluoro atom-containing substituent is a monocyclic or polycyclic aromatic, monocyclic or polycyclic alicyclic, or a divalent organic group having a structure in which two or more thereof are connected by a single bond or a linking group. It may be a structure in which the fluoro atom-containing substituent is directly substituted with the aromatic or alicyclic ring or substituted with the linking group.
- the connector is the same as described above.
- the divalent organic group having a fluoro atom-containing substituent is 2,2'-bis (trifluoromethyl) -benzidine (2,2'-bis (trifluoromethyl) benzidine) or 2,2-bis It may be a divalent organic group derived from [4-(-aminophenoxy) phenyl] hexafluoropropane (2,2-Bis [4-(-aminophenoxy) phenyl] hexafluoropropane).
- the divalent organic group that does not have a fluoro atom-containing substituent that does not have a fluoro atom-containing substituent
- It may be derived from a compound selected from para-phenylenediamine, meta-phenylenediamine, and mixtures thereof.
- the polyimide prepared by the polymerization and imidization of the above-described acid dianhydride and diamine may be to include a structure of formula (5):
- X 1 to X 3 is a tetravalent organic group including an aromatic, alicyclic, aliphatic group, or a combination thereof derived from an acid dianhydride,
- Y 1 to Y 3 are each independently a divalent organic group including an aromatic, alicyclic, aliphatic group or a combination thereof derived from diamine.
- X 1 to X 3 are each independently monocyclic or polycyclic aromatic having 6 to 18 carbon atoms, monocyclic or polycyclic alicyclic having 6 to 18 carbon atoms, or two or more thereof are a single bond or a linking group It may be a tetravalent organic group having a structure connected by.
- Y 1 to Y 3 each independently represent a part way of a carbon number of 6 to 18 or polycyclic aromatic, part way or polycyclic aliphatic, or two or more single bond or a connecting group of which the carbon number of 6 to 18 It may be a divalent organic group having a structure connected by.
- At least one of X 1 to X 3 or Y 1 to Y 3 may have a substituent having a fluoro atom.
- Substituents having a fluoro atom may be directly substituted with an aromatic or alicyclic ring or substituted with a linking group. Acid dianhydrides and diamines with or without substituents having a fluoro atom are as described above.
- X 1 to X 3 in Chemical Formula 5 is a tetravalent organic group derived from 4,4 ′-(hexafluoroisopropylidene) diphthalic anhydride.
- Y 1 may be a divalent organic group derived from an aromatic diamine having a substituent having a fluoro atom
- Y 2 and Y 3 are each independently derived from an aromatic diamine having no substituent having a fluoro atom. It may be a divalent organic group.
- Y 1 may be a divalent organic group derived from 2,2′-bis (trifluoromethyl) benzidine.
- Y 2 and Y 3 are each independently p-phenylenediamine, m-phenylenediamine, 4,4-diaminodiphenyl ether and 4,4 '-(9-fluorenylidene) di. It may be a divalent organic group derived from aniline (4,4 '-(9-fluorenylidene) dianiline).
- p / (p + q + r) in Formula 5 may be 0.3 to 0.7.
- Y 2 is a divalent organic group derived from p-phenylenediamine, m-phenylenediamine or 4,4 diaminodiphenyl ether or a combination thereof
- Y 3 is 4,4 '-(9 It may be a divalent organic group derived from -fluorenylidene) dianiline (4,4 '-(9-fluorenylidene) dianiline).
- r / (p + q + r) may be preferably 0.3 or less, or 0.2 or less.
- X 1 is 4,4 '-(hexafluoroisopropylidene) diphthalic anhydride (4,4'-(Hexafluoroisopropylidene) diphthalic anhydride),
- X 2 and X 3 are each independently pyromellitic dianhydride or 3,3 ', 4,4'-biphenyltetracarboxylic dianhydride (3,3', 4,4'-Biphenyltetracarboxylic dianhydride ) May be selected from.
- At least one of Y 1 to Y 3 is preferably a divalent organic group derived from 2,2′-bis (trifluoromethyl) -benzidine.
- P / (p + q + r) and r / (p + q + r) are each about 0.4 or less, or about 0.1 or more and about 0.3 or less, and q / (p + q + r) is about 0.5 to about May be 0.8.
- the acid dianhydride and the diamine compound are preferably used in an appropriate reaction ratio in consideration of the physical properties of the polyimide to be finally produced. Specifically, it may be preferable that the diamine compound is used in a molar ratio of 0.8 to 1.2 or 0.9 to 1.1 with respect to 1 mol of the acid dianhydride. If the content ratio is out of the above range, the imidation rate or molecular weight of the polyimide to be produced is low, there is a fear that film formation becomes difficult.
- the polymerization reaction of the acid dianhydride and the diamine compound may be carried out according to a polymerization method of a conventional polyimide or a precursor thereof, such as solution polymerization.
- the diamine compound when carried out by solution polymerization, may be dissolved in the polymerization solvent described above, followed by addition of an acid dianhydride to react.
- the polymerization solvent is ACD / LogP module of ACD / Percepta platform of ACD / Labs (for reference, ACD / LogP module is based on QSPR (Quantitative Structure-Property Relationship) methodology based on molecular 2D structure). It is preferable to use one having a positive distribution coefficient (LogP value) at 25 ° C. calculated by).
- the polymerization reaction is carried out for about 0.5 to 5 hours, or about 1 to 3 hours at a temperature of less than about 10 to 30 °C, or a temperature of about 15 to 25 °C, or room temperature, about 30 to 65 It may be desirable to carry out the polymerization at a temperature of ⁇ , or at a temperature of about 40 to 60 ⁇ , for about 5 to 50 hours, or about 10 to 40 hours, or about 20 to 30 hours.
- the polyamic acid is an acid or a derivative of the acid including a -CO-NH- group and a CO-OR group (wherein R is a hydrogen atom or an alkyl group) according to the reaction of an acid anhydride group and an amino group, and another embodiment of the present invention.
- a polyamic acid having the structure of formula (II):
- the imidation process is performed with respect to the polyamic acid obtained as a result of the said polymerization reaction.
- the imidization process may be specifically carried out by a chemical imidization or thermal imidization method.
- chemical imidization includes acid anhydrides such as acetic anhydride, propionic anhydride and benzoic anhydride or acid chlorides thereof; It can be implemented using dehydrating agents, such as carbodiimide compounds, such as dicyclohexyl carbodiimide.
- the dehydrating agent may be preferably used in an amount of 0.1 to 10 moles with respect to 1 mole of the acid dianhydride.
- the heating step at a temperature of 60 to 120 °C at the time of the chemical imidization may be carried out together.
- thermal imidization it may be carried out by heat treatment at a temperature of 80 to 400 ° C, wherein the azeotropic removal of water generated as a result of the dehydration reaction using benzene, toluene, xylene, etc. is also performed. More preferred.
- the chemical or thermal imidization process is carried out under a base catalyst such as pyridine, isoquinoline, trimethylamine, triethyl amine, N, N-dimethylaminopyridine, imidazole, 1-methylpiperidine, 1-methylpiperazine, etc.
- a base catalyst such as pyridine, isoquinoline, trimethylamine, triethyl amine, N, N-dimethylaminopyridine, imidazole, 1-methylpiperidine, 1-methylpiperazine, etc.
- the base catalyst may be used in an amount of 0.1 to 5 moles per 1 mole of the acid dianhydride.
- the prepared polyimide of Formula 1 is obtained in a solution state dissolved in an organic solvent used in the polymerization reaction, the solution may contain a polyamic acid which is a precursor of the unimidized polyimide.
- the prepared polyimide or its precursor may be separated as a solid and then re-dissolved in an organic solvent to prepare a polyimide-based solution according to the present invention, or may be used as it is. Separation of the polyimide may be carried out by adding a poor solvent for polyimide, such as methanol, isopropyl ether, to precipitate the polyimide in the solution obtained as a result of filtration, washing, drying, etc.
- a poor solvent for polyimide such as methanol, isopropyl ether
- the same solvent as the organic solvent used in the polymerization reaction may be used as the re-dissolving solvent.
- ACD / LogP module of ACD / Percepta platform of ACD / Labs where ACD / LogP module is based on QSPR (Quantitative Structure-Property Relationship) methodology based algorithm using molecular 2D structure
- QSPR Quantitative Structure-Property Relationship
- the polyimide-based solution prepared by the above method is capable of producing an isotropic or anisotropic polyimide film having high light transmittance and excellent ultra high heat resistance and excellent mechanical properties.
- the present invention also provides a method for producing a polyimide-based film comprising the step of applying a polyimide-based solution according to the present invention to one surface of a substrate, curing, and then separating it from the substrate.
- CN band appearing at 1350 to 1400cm -1 or 1550 to 1650cm -1 in the IR spectrum applying the composition containing the polyester precursor, polyamic acid and the polyimide of the polyimide after imidization proceeds at a temperature above 500 °C About 60% to 99%, or about 70% to 98%, when the relative integrated intensity ratio of the CN band after imidation is performed at a temperature of 200 ° C. or more with respect to 100% of the integrated intensity of It may have an imidation ratio of about 75 to 96%.
- the polyimide of Chemical Formula 1 may have a weight average molecular weight of 10,000 to 200,000 g / mol, or 20,000 to 100,000 g / mol, or 40,000 to 200,000 g / mol of polystyrene.
- the polyimide of Chemical Formula 1 preferably has a molecular weight distribution (Mw / Mn) of 1.1 to 2.5.
- the imidation ratio, weight average molecular weight, or molecular weight distribution of the polyimide of Formula 1 is outside the above range, film formation may be difficult or characteristics of the polyimide film such as permeability, heat resistance, and mechanical properties may be deteriorated. .
- the polyimide of Chemical Formula 1 may have a glass transition temperature of about 250 ° C. or higher, or 250 to 320 ° C. Since it has such excellent heat resistance, the film containing the said polyimide can show the outstanding heat resistance also with respect to the high temperature heat added during an element manufacturing process, and using the said polyimide-type film as a display substrate, on the said display substrate Occurrence of warpage and other deterioration of reliability of the device can be suppressed during the device manufacturing process, and as a result, a device having improved characteristics and reliability can be produced.
- the polyimide-based solution according to the present invention contains solid content in an amount such that the appropriate film-forming composition has an appropriate viscosity in consideration of processability such as coating property in the film forming step.
- the polyimide film-forming composition may be included in an amount such that it has a viscosity of 400 to 50,000 cP.
- the content of the composition for forming a polyimide film is less than 400 cP because the content of the organic solvent is too small or the content of the composition for forming a polyimide film exceeds 50,000 cP because the content of the organic solvent is too high, the polyimide film for forming There exists a possibility that processability at the time of manufacture of a display substrate using a composition may fall.
- the solid content is 10% to 25% by weight, and may have a viscosity of 1,000 to 50,000 cP or 2,000 to 10,000 cP.
- the polyimide-based solution contains a precursor of polyimide
- a polyamic acid-containing solution obtained after the polymerization reaction of the acid dianhydride and the diamine-based compound in a polymerization solvent may be used.
- the polyimide-based solution containing the polyimide or its precursor is an additive such as a binder, a solvent, a crosslinking agent, an initiator, a dispersant plasticizer, a viscosity modifier, an ultraviolet absorber, a photosensitive monomer, or a sensitizer which is usually used for forming a polyimide film. It may further include.
- the polyimide-based solution prepared above is applied to one surface of the substrate, cured at a temperature of 80 to 400 ° C, and then separated from the substrate, thereby producing a polyimide-based film.
- a glass, a metal substrate, or a plastic substrate may be used as the substrate without particular limitation.
- polyimide formed after curing is excellent in thermal and chemical stability during the curing process for the polyimide precursor, and without a separate release agent treatment. Glass substrates that can be easily separated without damage to the system film may be desirable.
- the coating step may be carried out according to a conventional coating method, specifically, spin coating method, bar coating method, roll coating method, air-knife method, gravure method, reverse roll method, kiss roll method, doctor blade method, Spray method, dipping method, brushing method and the like can be used.
- spin coating method bar coating method, roll coating method, air-knife method, gravure method, reverse roll method, kiss roll method, doctor blade method, Spray method, dipping method, brushing method and the like can be used.
- the continuous process is possible, and it may be more preferable to be carried out by a casting method that can increase the imidation ratio of the polyimide resin.
- the polyimide-based solution may be applied on the substrate in a thickness range such that the polyimide-based film to be produced has a thickness suitable for the display substrate. Specifically, it may be applied in an amount such that it becomes a thickness of 10 to 30 ⁇ m.
- a drying step for removing the solvent present in the polyimide-based solution prior to the curing process may optionally be further performed.
- the drying process may be carried out in accordance with a conventional method, specifically may be carried out at a temperature of 140 °C or less, or 80 to 140 °C.
- a temperature of 140 °C or less or 80 to 140 °C.
- the implementation temperature of a drying process is less than 80 degreeC, a drying process becomes long, and when it exceeds 140 degreeC, imidation advances rapidly and it is difficult to form polyimide film of uniform thickness.
- the curing process may be performed by heat treatment at a temperature of 80 to 400 °C.
- the curing process may be carried out by a multi-step heat treatment at various temperatures within the above temperature range.
- the curing time during the curing process is not particularly limited, it may be carried out for 30 minutes to 6 hours as an example.
- a subsequent heat treatment step may be optionally further performed to increase the imidation ratio of the polyimide resin in the polyimide film to form a polyimide film having the above-described physical properties.
- the subsequent heat treatment process is preferably carried out at 200 °C or more, or 200 to 450 °C for 1 to 30 minutes.
- the subsequent heat treatment process may be performed once or may be performed in multiple stages two or more times. Specifically, it may be performed in three steps including a first heat treatment at 200 to 220 ° C., a second heat treatment at 300 to 350 ° C., and a third heat treatment at 400 to 450 ° C.
- the polyimide film can be produced by peeling the polyimide film formed on the substrate from the substrate according to a conventional method.
- the polyimide-based film produced by the above production method includes the polyimide of Chemical Formula 1, thereby exhibiting high heat resistance and mechanical strength with high transparency.
- the polyimide film is useful as a substrate of an element requiring high transparency and excellent heat resistance and mechanical strength, such as OLED or LCD, electronic paper, solar cell, and the like.
- the film may have a dimension change at 400 ° C. of less than 200 ⁇ m, or 170 ⁇ m or less, or 150 ⁇ m or less.
- the polyimide film has a Coefficient of Thermal Expansion (CTE) of about 70 ppm / K or less, or about 65 ppm / K or less, or about 1 to 63 ppm / K when heated up from 100 ° C. to 300 ° C. It may be a high heat resistant polyimide film.
- CTE Coefficient of Thermal Expansion
- the polyimide-based film has a hedgeness (Haziness) 2 or less, transmittance of light of 380 to 760nm wavelength light of 85% or more, or 87% or more in the film thickness range of 10 to 30 ⁇ m, yellowness (YI ) May be about 9 or less, or about 8 or less, or about 6 or less.
- the polyimide film has a modulus of about 1.0 GPa or more, or about 1.5 to 2.5 GPa, a maximum stress value of about 40 to 400 MPa, or about 85 to 300 MPa, and a maximum elongation of about 10 to 100. %, Or about 10 to 45% polyimide-based film with good mechanical properties.
- the polyimide film according to the embodiment has an in-plane retardation value R in of about 0.01 to 1 nm, a retardation value R th in the thickness direction of about 100 nm or less, or an in-plane retardation value R in of It may be an isotropic film having a thickness of about 0.05 to 0.5 nm and a phase difference value R th in the thickness direction of about 90 nm or less.
- the in-plane retardation value R in is about 0.05 to 1 nm
- the retardation value R th in the thickness direction is about 100 nm or more
- the in-plane retardation value R in is about 0.1 nm. It may be an anisotropic film having a thickness of 0.5 nm or more, and a phase difference value R th in the thickness direction of about 150 nm or more.
- a display substrate and a device including the polyimide film may be provided.
- the device can be any solar cell (eg, flexible solar cell) with a flexible substrate, organic light emitting diode (OLED) illumination (eg, flexible OLED lighting), any semiconductor with a flexible substrate.
- OLED organic light emitting diode
- Devices, or flexible display devices such as organic electroluminescent devices, electrophoretic devices, or LCD devices having a flexible substrate.
- the ACD / LogP module of the ACD / Percepta platform of ACD / Labs (where ACD / LogP module is calculated using QSPR (Quantitative Structure-Property Relationship) methodology based algorithm using molecular 2D structure)
- the partition coefficient (LogP value) at °C is as follows.
- Equamide-M100 (manufactured by Idemitsu Kosan Co., Ltd.)
- ODPA 4,4'-oxydiphthalic anhydride
- aODPA 2,3,3 ', 4'-oxydiphthalic anhydride
- TFMB 2,2'-bis (trifluoromethyl) benzidine
- m-PDA meta-phenylenediamine
- HFBAPP 2,2-Bis [4-(-aminophenoxy) phenyl] hexafluoropropane
- a polyimide precursor solution was prepared in the same manner as described above, except that the compounds shown in Table 1 were used.
- a polyamic acid solution was prepared in the same manner as in Example 1 except for changing the solvent and using the compounds shown in Table 1 below.
- the glass substrate coated with the polyimide precursor solution was placed in an oven and heated at a rate of 2 ° C./min, 15 minutes at 80 ° C., 30 minutes at 150 ° C., 30 minutes at 220 ° C., and 350 ° C.
- the curing process was performed by maintaining for 1 hour. After completion of the curing process, the glass substrate was immersed in water to remove the film formed on the glass substrate and dried at 100 ° C. in an oven.
- film properties such as transmittance, yellowness, retardation value, glass transition temperature, and thermal expansion coefficient were measured in the following manner.
- the transmittance of the film was measured by a transmittance meter (model name HR-100, manufactured by Murakami Color Research Laboratory) based on JIS K 7105.
- Yellowness Index was measured using a color difference meter (Color Eye 7000A).
- Plane retardation (Rin) and thickness retardation (Rth) of the film were measured using Axoscan.
- the film was cut to a certain size to measure the thickness, and then the thickness was measured while calibrating in the direction of the C-plate to compensate for the phase difference value by measuring the phase difference with Axoscan.
- the refractive index at this time was measured by inputting the refractive index of the polyimide to measure.
- the glass transition temperature (Tg) and thermal expansion coefficient (CTE) of the film were measured using Q400 of TA. After preparing the film in the size of 5x20mm, the sample was loaded using the accessory. The length of the film actually measured was made the same at 16 mm. The pulling force of the film was set to 0.02N, and the measurement start temperature was heated to 350 ° C at a rate of 5 / min at 30 ° C, and the coefficient of linear thermal expansion was measured as an average value in the range of 300 to 350 ° C.
- Zwick's UTM was used to measure the mechanical properties (modulus, peak stress, elongation) of the film. After the film was cut to 5 mm horizontally and 60 mm or longer, the distance between the grips was set to 40 mm, and the value measured while pulling the sample at a speed of 20 mm / min was confirmed.
- Example 1-1 Comparative Example 1-1 Comparative Example 1-2 Comparative Example 1-3 Comparative Example 1-4 Thickness (mm) 10.9 10.6 10.8 10.7 10.6 Transmittance (%) T 555 89.9 89.6 89.4 88.4 88.3 Tg (°C) 300 300 300 300 300 CTE (ppm / K, ⁇ 250 ° C) 50 53 51 50 54
- the polyimide film prepared using the polyamic acid solution according to the present invention is an isotropic film having high heat resistance and mechanical properties with excellent transparency.
- Comparative Examples 1-1 to 1-4 there is no difference in physical properties of the resultant film, but as shown in Table 1, the haze of the polyamic acid solution coating is high, as the polyamic acid meets water to form a salt. It means that agglomeration phenomenon has occurred. Therefore, it can be seen that the film prepared with the solution of Comparative Example has a rough surface.
- polyimide precursor solution of Examples and Comparative Examples was carried out in the same manner except using the compounds described in Tables 3 to 5 below in the amounts described above and changing the solvent. Was prepared.
- the glass substrate on which the polyimide precursor solution prepared in Experimental Example 2-1 was applied was treated in the same manner as in Experimental Example 1-2 to obtain a film.
- film properties such as transmittance, yellowness, retardation value, glass transition temperature, and coefficient of thermal expansion were measured in the same manner as in Experimental Example 1-2. The results are shown in Tables 4 to 6 below.
- Example 2-1 Comparative Example 2-1 Acid dianhydride 6FDA 6FDA Diamine TFMB / m-PDA TFMB / m-PDA Diamine mixed molar ratio 5/5 5/5 menstruum DEF Equamide-100 LogP (25 degrees Celsius) 0.05 -0.74 Thickness (mm) 12.3 10.8 Transmittance (%) T 555 90 89.8 T ave.
- Example 2-2 Comparative Example 2-2 Acid dianhydride 6FDA 6FDA Diamine TFMB / ODA / FDA TFMB / ODA / FDA Diamine mixed molar ratio 7/2/1 7/2/1 menstruum DEF Equamide-100 LogP (25 degrees Celsius) 0.05 -0.74 Thickness (mm) 11.9 12.7 Transmittance (%) T 555 89.7 88.9 T ave.
- the polyimide-based films of Examples 2-1 to 2-3 according to the present invention are isotropic films having high heat resistance and mechanical properties with excellent transparency.
- transparency and yellowness are affected by the difference in solvent.
- Hydrophobic solvents with high boiling point and low polarity compared to solvents with high polarity have low affinity and low polarity, and have a proper affinity with the polyamic acid structure and the evaporation rate increases according to the curing temperature.
- the resulting impurity content is low and may result in low yellowness.
- Example 3-2 The polyimide precursor solution of Example 3-2 and Comparative Example 3-1 was prepared in the same manner except that only the kind of the solvent was different as shown in Table 8.
- the glass substrate on which the polyimide precursor solution prepared in Experimental Example 3-1 was applied was treated in the same manner as in Experimental Example 1-2 to obtain a film.
- film properties such as transmittance, yellowness, retardation value, glass transition temperature, and coefficient of thermal expansion were measured in the same manner as in Experimental Example 1-2. The results are shown in Table 8 below.
- Example 3-1 Example 3-2 Comparative Example 3-1 Acid dianhydride PMDA / 6FDA / BPDA (6/2/2) Diamine TFMB menstruum NEP DEF NMP LogP (25 degrees Celsius) 0.22 0.05 -0.28 Viscosity (cp) 46400 14800 78000 Thickness ( ⁇ m) 11.4 11 11.3 Transmittance (%) T ave.
- the polyimide-based films of Examples 3-1 to 3-2 according to the present invention are anisotropic films having high heat resistance and mechanical properties with excellent transparency.
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Abstract
Description
헤이즈(%) | ||||||
실시예 1-1 | 비교예1- 1 | 비교예1- 2 | 비교예 1-3 | 비교예 1-4 | ||
시험No. | 무수물/디아민 | DEF | DMAc | DMF | NMP | EQ-M100 |
1 | ODPA/TFMB | 0.6 | 75 | 74 | 85 | 47 |
2 | ODPA/HFBAPP | 0.4 | 50 | 60 | 70 | 30 |
3 | BPDA/TFMB | 0.5 | 52 | 63 | 84 | 35 |
4 | aBPDA/TFMB | 0.4 | 67 | 61 | 78 | 41 |
5 | aODPA/TFMB | 0.6 | 86 | 87 | 87 | 46 |
6 | PMDA/TFMB | 0.4 | 50 | 60 | 70 | 30 |
7 | PMDA-H/HFBAPP | 0.5 | 63 | 78 | 79 | 35 |
8 | 6FDA/TFMB | 0.5 | 72 | 76 | 87 | 43 |
9 | 6FDA/PDA | 0.4 | 50 | 60 | 70 | 30 |
10 | 6FDA/m-PDA | 0.6 | 52 | 63 | 84 | 35 |
시험필름 No. | 실시예 1-1 | 비교예 1-1 | 비교예 1-2 | 비교예 1-3 | 비교예 1-4 | |
두께(mm) | 10.9 | 10.6 | 10.8 | 10.7 | 10.6 | |
투과율(%) | T555 | 89.9 | 89.6 | 89.4 | 88.4 | 88.3 |
Tg(℃) | 300 | 300 | 300 | 300 | 300 | |
CTE(ppm/K, ~250℃) | 50 | 53 | 51 | 50 | 54 |
실시예 | 헤이즈(%) | 비교예 | 헤이즈(%) |
2-1 | 0.1 | 2-1 | 78 |
2-2 | 0.2 | 2-2 | 80 |
2-3 | 0.1 | 2-3 | 75 |
시험필름 No. | 실시예 2-1 | 비교예 2-1 | |
산이무수물 | 6FDA | 6FDA | |
디아민 | TFMB/m-PDA | TFMB/m-PDA | |
디아민혼합몰비 | 5/5 | 5/5 | |
용매 | DEF | Equamide-100 | |
LogP(25℃) | 0.05 | -0.74 | |
두께(mm) | 12.3 | 10.8 | |
투과율(%) | T555 | 90 | 89.8 |
Tave.(380~760nm) | 89.2 | 88.1 | |
YI | 5.4 | 8.4 | |
Rin(nm) | 0.2 | 0.05 | |
Rth(nm) | 44 | 38 | |
Tg(℃) | 330 | 330 | |
CTE(ppm/K, ~250℃) | 40 | 50 | |
CTE(ppm/K, ~300℃) | 52 | 56 | |
모듈러스(GPa) | 2.8 | 3.2 | |
최대 스트레스(Mpa) | 120 | 123 | |
최대 연신율(%) | 20 | 16 |
시험필름 No. | 실시예 2-2 | 비교예 2-2 | |
산이무수물 | 6FDA | 6FDA | |
디아민 | TFMB/ODA/FDA | TFMB/ODA/FDA | |
디아민혼합몰비 | 7/2/1 | 7/2/1 | |
용매 | DEF | Equamide-100 | |
LogP(25℃) | 0.05 | -0.74 | |
두께(mm) | 11.9 | 12.7 | |
투과율(%) | T555 | 89.7 | 88.9 |
Tave.(380~760nm) | 86.8 | 85.7 | |
YI | 5.2 | 6.3 | |
Rin(nm) | 0.05 | 0.15 | |
Rth(nm) | 65 | 74 | |
Tg (℃) | 325 | 325 | |
CTE(ppm/K, ~250℃) | 43 | 52 | |
CTE(ppm/K, ~300℃) | 57 | 64 | |
모듈러스(GPa) | 3.7 | 3.8 | |
최대 스트레스(Mpa) | 112 | 118 | |
최대 연신율(%) | 13.5 | 9.4 |
시험필름 No. | 실시예 2-3 | 비교예 2-3 | |
산이무수물 | 6FDA | 6FDA | |
디아민 | TFMB/PDA/FDA | TFMB/PDA/FDA | |
디아민혼합몰비 | 7/2/1 | 7/2/1 | |
용매 | DEF | Equamide-100 | |
LogP(25℃) | 0.05 | -0.74 | |
두께(mm) | 11.6 | 11.7 | |
투과율(%) | T555 | 90 | 89.4 |
Tave.(380~760nm) | 87.5 | 86.6 | |
YI | 5.2 | 6.5 | |
Rin(nm) | 0.13 | 0.05 | |
Rth(nm) | 62 | 54 | |
Tg(℃) | 325 | 325 | |
CTE(ppm/K, ~250℃) | 45 | 55 | |
CTE(ppm/K, ~300℃) | 57 | 65 | |
모듈러스(GPa) | 2.9 | 3.2 | |
최대 스트레스(Mpa) | 105 | 112 | |
최대 연신율(%) | 11.3 | 27 |
헤이즈(%) | |
실시예 3-1 | 0.1 |
실시예 3-2 | 0.1 |
비교예 3-1 | 65 |
시험필름 No. | 실시예 3-1 | 실시예 3-2 | 비교예3-1 | |
산이무수물 | PMDA/6FDA/BPDA (6/2/2) | |||
디아민 | TFMB | |||
용매 | NEP | DEF | NMP | |
LogP(25℃) | 0.22 | 0.05 | -0.28 | |
점도(cp) | 46400 | 14800 | 78000 | |
두께(㎛) | 11.4 | 11 | 11.3 | |
투과율(%) | Tave.(380~760nm) | 82 | 82 | 82 |
YI | 7.2 | 7.8 | 7.3 | |
Rth(nm) | 803 | 825 | 811 | |
CTE | 100~300℃ (ppm/℃) | 9.7 | 12 | 11 |
300~100℃ (ppm/℃) | 22 | 20 | 19 | |
모듈러스(GPa) | 4.9 | 5.9 | 5.5 | |
최대 스트레스(MPa) | 140 | 180 | 231 | |
최대 연신율(%) | 13 | 19 | 29 |
Claims (25)
- 제1항에 있어서,상기 용매는 25℃에서의 분배계수(LogP 값)가 양수인 것인 폴리이미드계 용액.
- 제1항에 있어서,상기 X가 플루오로 원자 함유 치환기를 갖는 4가 유기기를 포함하거나,상기 Y가 플루오로 원자 함유 치환기를 갖는 2가 유기기를 포함하거나, 또는 상기 X 및 Y가 모두 플루오로 원자 함유 치환기를 갖는 유기기를 포함하는 것인, 폴리이미드계 용액.
- 제1항에 있어서,상기 2가 유기기 또는 4가 유기기는 각각 독립적으로 방향족, 지환족, 지방족 및 이들의 조합으로부터 선택되는 2가 유기기 또는 4가 유기기인 것인, 폴리이미드계 용액.
- 제1항에 있어서,상기 폴리이미드 또는 폴리아믹산은 상기 Y가 플루오로 원자 함유 치환기를 갖는 2가 유기기인 구조와, 플루오로 원자 함유 치환기를 갖지 않는 2가 유기기인 구조를 함께 포함하는 것인, 폴리이미드계 용액.
- 제3항에 있어서,2가 유기기 Y의 전체 몰수 대비, 플루오로 치환기를 갖는 2가 유기기의 몰비가 0.1 내지 1 인 것인, 폴리이미드계 용액.
- 제1항에 있어서,상기 Y가 일환식 또는 다환식 방향족, 일환식 또는 다환식 지환족, 또는 이들 중 둘 이상이 단일결합 또는 연결기에 의해 연결된 구조를 갖는 2가 유기기를 포함하는 것인, 폴리이미드계 용액.
- 제3항에 있어서, 플루오로 원자 함유 치환기를 갖는 2가 유기기가, 일환식 또는 다환식 방향족, 일환식 또는 다환식 지환족, 또는 이들 중 둘 이상이 단일결합 또는 연결기에 의해 연결된 구조를 갖는 2가 유기기이며, 상기 플루오로 원자 함유 치환기가 상기 방향족 또는 지환족 고리에 직접 치환되어 있거나 상기 연결기에 치환되어 있는 구조인 것인, 폴리이미드계 용액.
- 제3항에 있어서,플루오로 원자 함유 치환기를 갖는 2가 유기기가 2,2'-비스(트리플루오로메틸)-벤지딘(2,2'-bis(trifluoromethyl)benzidine) 또는 2,2-비스[4-(-아미노페녹시)페닐]헥사플루오로프로판(2,2-Bis[4-(-aminophenoxy)phenyl]hexafluoropropane)으로부터 유래된 2가 유기기인 것인, 폴리이미드계 용액.
- 제5항에 있어서,플루오로 원자 함유 치환기를 갖지 않는 2가 유기기가4,4'-옥시디아닐린(4,4'-oxydianiline),4,4'-(9-플루오레닐리덴)디아닐린(4,4'-(9-fluorenylidene)dianiline),파라-페닐렌디아민(para-phenylenediamine), 메타-페닐렌디아민(meta-phenylenediamine), 및 이들의 혼합물로부터 선택된 화합물로부터 유래된 것인 폴리이미드계 용액.
- 제1항에 있어서,상기 폴리이미드 또는 폴리아믹산은 상기 X가 플루오로 원자 함유 치환기를 갖는 4가 유기기인 구조와, 플루오로 원자 함유 치환기를 갖지 않는 4가 유기기인 구조를 함께 포함하는 것인, 폴리이미드계 용액.
- 제3항에 있어서,4가 유기기 X의 전체 몰수 대비, 플루오로 치환기를 갖는 4가 유기기의 몰비가 0.1 내지 1 인 것인, 폴리이미드계 용액.
- 제1항에 있어서,상기 X가 일환식 또는 다환식 방향족, 일환식 또는 다환식 지환족, 또는 이들 중 둘 이상이 단일결합 또는 연결기에 의해 연결된 구조를 갖는 4가 유기기를 포함하는 것인, 폴리이미드계 용액.
- 제3항에 있어서,플루오로 원자 함유 치환기를 갖는 4가 유기기가, 일환식 또는 다환식 방향족, 일환식 또는 다환식 지환족, 또는 이들 중 둘 이상이 단일결합 또는 연결기에 의해 연결된 구조를 갖는 4가 유기기이며, 상기 플루오로 원자 함유 치환기가 상기 방향족 또는 지환족 고리에 직접 치환되어 있거나 상기 연결기에 치환되어 있는 구조인 것인, 폴리이미드계 용액.
- 제3항에 있어서,플루오로 원자 함유 치환기를 갖는 4가 유기기가, 4,4′-(헥사플루오로이소프로필리덴)디프탈산무수물(4,4'-(Hexafluoroisopropylidene)diphthalic anhydride) 인 것인, 폴리이미드계 용액.
- 제11항에 있어서,플루오로 원자 함유 치환기를 갖지 않는 4가 유기기가3,3',4,4'- 비페닐테트라카르복실산 이무수물(3,3',4,4'-Biphenyltetracarboxylic dianhydride),2,3,3',4'-비페닐테트라카르복실산 이무수물(2,3,3',4'-Biphenyltetracarboxylic dianhydride),피로멜리트산 무수물(Pyromellitic Anhydride),1,2,4,5-시클로헥산테트라카르복실산 이무수물(1,2,4,5-cyclohexanetetracarboxylic dianhydride),4,4'-옥시디프탈산 무수물(4,4'-oxydiphthalic anhydride),2,3,3',4'-옥시디프탈산 무수물(2,3,3',4'-oxydiphthalic anhydride), 및 이들의 혼합물로부터 선택되는 화합물로부터 유래된 것인 폴리이미드계 용액.
- 제1항에 있어서,상기 폴리이미드계 용액은 브룩필드 회전 점도계(Brookfield rotational viscometer)로 25℃에서 측정한 점도가 400cP 이상 50,000cP 이하인 것인, 폴리이미드계 용액.
- 제1항 내지 제17항 중 어느 한 항의 폴리이미드계 용액을 기판의 일면에 도포하고 경화한 후, 기판으로부터 분리하여 얻은 폴리이미드계 필름.
- 제18항에 있어서,상기 폴리이미드의 유리전이온도가 250℃ 이상이고, 10 내지 30㎛의 필름 두께 범위에서 380 내지 760nm 파장의 빛에 대한 투과도가 85% 이상인 폴리이미드계 필름.
- 제18항에 있어서,250℃에서의 열팽창계수(CTE)가 70ppm/K 이하인 폴리이미드계 필름.
- 제18항에 있어서,상기 필름은 면내 위상차값(Rin)이 0.01 내지 1nm이고 두께 방향의 위상차값(Rth)이 100nm 이하인 폴리이미드계 필름.
- 제18항에 있어서,상기 필름은 두께 방향의 위상차값(Rth)이 100nm 이상인 필름.
- 제18항에 있어서,상기 필름은 황색도(YI)가 9 이하이며, 모듈러스(modulus)가 1.0 GPa 이상인 폴리이미드계 필름.
- 제18항의 폴리이미드계 필름을 포함하는 디스플레이 기판.
- 제18항에 따른 폴리이미드계 필름을 포함하는 소자.
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CN201580002199.4A CN105637016B (zh) | 2014-05-30 | 2015-06-01 | 聚酰亚胺基液体和使用其制备的聚酰亚胺基膜 |
JP2016544304A JP6368961B2 (ja) | 2014-05-30 | 2015-06-01 | ポリイミド系溶液、及びこれを用いて製造されたポリイミド系フィルム |
US15/027,533 US10144847B2 (en) | 2014-05-30 | 2015-06-01 | Polyimide-based solution and polyimide-based film produced using same |
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CN107522860A (zh) | 2017-12-29 |
EP3150655A1 (en) | 2017-04-05 |
TW201605977A (zh) | 2016-02-16 |
TWI551652B (zh) | 2016-10-01 |
CN107522860B (zh) | 2020-09-25 |
US20160251545A1 (en) | 2016-09-01 |
CN107722270B (zh) | 2021-04-20 |
US10647883B2 (en) | 2020-05-12 |
JP2016531997A (ja) | 2016-10-13 |
JP6368961B2 (ja) | 2018-08-08 |
CN107722270A (zh) | 2018-02-23 |
EP3150655A4 (en) | 2018-02-07 |
CN105637016A (zh) | 2016-06-01 |
EP3150655B1 (en) | 2021-05-05 |
US20190062590A1 (en) | 2019-02-28 |
CN105637016B (zh) | 2017-11-07 |
US10144847B2 (en) | 2018-12-04 |
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