WO2013115212A1 - 光学材料用組成物の製造方法 - Google Patents
光学材料用組成物の製造方法 Download PDFInfo
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- WO2013115212A1 WO2013115212A1 PCT/JP2013/051970 JP2013051970W WO2013115212A1 WO 2013115212 A1 WO2013115212 A1 WO 2013115212A1 JP 2013051970 W JP2013051970 W JP 2013051970W WO 2013115212 A1 WO2013115212 A1 WO 2013115212A1
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- JSFMLUJTCDQJSE-UHFFFAOYSA-N C(C1NC1)NNCC1NC1 Chemical compound C(C1NC1)NNCC1NC1 JSFMLUJTCDQJSE-UHFFFAOYSA-N 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G75/00—Macromolecular compounds obtained by reactions forming a linkage containing sulfur with or without nitrogen, oxygen, or carbon in the main chain of the macromolecule
- C08G75/28—Polythiocarbonates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G75/00—Macromolecular compounds obtained by reactions forming a linkage containing sulfur with or without nitrogen, oxygen, or carbon in the main chain of the macromolecule
- C08G75/02—Polythioethers
- C08G75/04—Polythioethers from mercapto compounds or metallic derivatives thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G75/00—Macromolecular compounds obtained by reactions forming a linkage containing sulfur with or without nitrogen, oxygen, or carbon in the main chain of the macromolecule
- C08G75/02—Polythioethers
- C08G75/06—Polythioethers from cyclic thioethers
- C08G75/08—Polythioethers from cyclic thioethers from thiiranes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/34—Heterocyclic compounds having nitrogen in the ring
- C08K5/3412—Heterocyclic compounds having nitrogen in the ring having one nitrogen atom in the ring
- C08K5/3432—Six-membered rings
- C08K5/3435—Piperidines
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L81/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing sulfur with or without nitrogen, oxygen or carbon only; Compositions of polysulfones; Compositions of derivatives of such polymers
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- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/02—Lenses; Lens systems ; Methods of designing lenses
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
Definitions
- the present invention relates to a composition for optical materials, and further relates to an optical material (optical resin material) such as a plastic lens, a prism, an optical fiber, an information recording base, and a filter using the composition.
- optical material optical resin material
- the optical material of the present invention is suitably used as a plastic lens, particularly as a lens for two-point frame glasses.
- Plastic materials have been widely used in recent years for various optical materials, particularly spectacle lenses, because they are light and tough and easy to dye.
- the performance required especially for optical materials, especially optical materials for spectacle lenses is low specific gravity as physical properties, low yellowness as chemical and thermal properties, high heat resistance, high strength as mechanical properties, etc.
- the optical performance is high transparency, high refractive index and high Abbe number.
- a high refractive index makes it possible to reduce the thickness of the lens, and a high Abbe number reduces chromatic aberration of the lens.
- the refractive index increases, the Abbe number decreases, and studies are being made to improve both simultaneously.
- optical materials having a refractive index of 1.73 or more have been proposed by optical materials composed of a polyepisulfide compound and an inorganic compound disclosed in Patent Documents 2 and 3.
- a refractive index of 1.73 or more comprising four components of an inorganic compound having a sulfur atom and / or a selenium atom, an episulfide compound, a thiol compound and an isocyanate compound. It was difficult to practically produce the optical material. Therefore, development of a manufacturing method of a lens having a refractive index of 1.73 or more and imparting strength and heat resistance has been demanded.
- the problems to be solved by the present invention are high refractive index (ne is 1.73 or more), high strength (elongation of 13% or more in a three-point bending test and good drilling strength), and high heat resistance. It is an object of the present invention to provide a practical optical material that satisfies the above three properties (softening point of TMA measurement is 70 ° C. or higher) and 3 points at the same time.
- the present inventors have conducted intensive research, and as a result, have a compound comprising an episulfide group, an inorganic compound having a sulfur atom, and a thiourethane bond-forming thiol compound and an isocyanate compound.
- a product is cured to obtain an optical material
- a method for producing a composition for optical material having a low viscosity and not causing rapid gelation by using a hindered amine compound as a catalyst for a prepolymerization reaction has been found. It came to. That is, the present invention is as follows.
- Optical including a step of producing a composition for optical materials by the method for producing a composition for optical materials according to [1] or [2], and a step of polymerizing and curing the obtained composition for optical materials. Material manufacturing method.
- [5] A lens for eyeglasses including the optical material according to [4].
- [6] The eyeglass lens according to [5], which has a strength capable of being attached to a two-point frame.
- the obtained optical material has a high refractive index (ne is 1.73 or more), high strength (a three-point bending test has an elongation of 13% or more and good drilling resistance), and high heat resistance. It is possible to provide a composition for an optical material that can have a property (TMA measurement value is 70 ° C. or higher), an optical material obtained by curing the composition, and a lens for two-point frame glasses using the composition. it can.
- hindered amine compound (henceforth, (e) compound) is used as a catalyst for carrying out the prepolymerization reaction of (a) compound and (b) compound.
- optional components such as a polymerization catalyst, a polymerization regulator, and a performance improver are used as necessary.
- the inorganic compound having a sulfur atom which is the compound (a) used in the present invention includes all inorganic compounds having one or more sulfur atoms.
- the amount of the compound (a) used is 10 to 50 parts by mass, preferably 10 to 40 parts by mass, more preferably 10 to 30 parts when the total of the compounds (a) and (b) is 100 parts by mass. Part by mass.
- the compound (a) is at least 10% by mass or more based on the total amount of the composition for optical material.
- the inorganic compound having a sulfur atom include sulfur, hydrogen sulfide, carbon disulfide, selenocarbon sulfide, ammonium sulfide, sulfur dioxide, sulfur trioxide and other sulfur oxides, thiocarbonate, sulfuric acid and salts thereof, sulfuric acid Hydrogen salt, sulfite, hyposulfite, persulfate, thiocyanate, thiosulfate, halides such as sulfur dichloride, thionyl chloride, thiophosgene, boron sulfide, nitrogen sulfide, silicon sulfide, phosphorus sulfide, arsenic sulfide, Examples thereof include metal sulfides and metal hydrosulfides.
- sulfur, carbon disulfide, phosphorus sulfide, selenium sulfide, metal sulfide and metal hydrosulfide are preferable, sulfur, carbon disulfide and selenium sulfide are more preferable, and sulfur is particularly preferable.
- These inorganic compounds having a sulfur atom may be used alone or in combination of two or more.
- the compound used in the present invention includes all episulfide compounds having one or more episulfide groups in one molecule, preferably two episulfide groups in one molecule. Specifically, bis ( ⁇ -epithiopropyl) sulfide, bis ( ⁇ -epithiopropyl) disulfide, bis ( ⁇ -epithiopropyl) trisulfide, bis ( ⁇ -epithiopropylthio) methane 1,2-bis ( ⁇ -epithiopropylthio) ethane, 1,3-bis ( ⁇ -epithiopropylthio) propane, 1,2-bis ( ⁇ -epithiopropylthio) propane, 1,4- One or more episulfi selected from the group consisting of bis ( ⁇ -epithiopropylthio) butane and bis ( ⁇ -epithiopropylthioethyl) sulfide Compound.
- preferred specific examples are bis ( ⁇ -epithiopropyl) sulfide (formula (1)) and / or bis ( ⁇ -epithiopropyl) disulfide (formula (2)), and the most preferred specific example is bis ( ⁇ -epithiopropyl) sulfide.
- the amount of the compound (b) used in the present invention is 50 to 90 parts by mass, preferably 60 to 90 parts by mass, when the total of the compounds (a) and (b) is 100 parts by mass.
- the amount is preferably 70 to 90 parts by mass.
- the compound used in the present invention includes all thiol compounds having one or more mercapto groups per molecule, but preferably has two or more mercapto groups in one molecule.
- Compounds such as m-xylylenedithiol, p-xylylenedithiol, o-xylylenedithiol, bis (2-mercaptoethyl) sulfide, pentaerythritol tetrakis (2-mercaptoacetate), pentaerythritol tetrakis (3 -Mercaptopropionate), and one or more selected from polythiol compounds such as 1,2-bis (2-mercaptoethylthio) -3-mercaptopropane. These may be used alone or in combination of two or more.
- m-xylylenedithiol (formula (3)), p-xylylenedithiol (formula (4)) represented by the following structural formula, pentaerythritol tetrakis (3-mercaptopropionate), and 1,2-bis (2-mercaptoethylthio) -3-mercaptopropane is particularly preferred, and m-xylylenedithiol that becomes a low-viscosity liquid at room temperature.
- the amount of the compound (c) used in the present invention is preferably 1 part by mass to 50 parts by mass, more preferably 2 parts by mass when the total of the compounds (a) and (b) is 100 parts by mass. Part to 30 parts by weight, more preferably 5 parts to 15 parts by weight.
- the compound (d) used in the present invention includes all isocyanate compounds having one or more isocyanate groups per molecule, preferably a compound having two isocyanate groups in one molecule. Specifically, it is at least one selected from diisocyanate compounds such as xylylene diisocyanate compound, 1,3-bis (isocyanatomethyl) cyclohexane, isophorone diisocyanate, and hexamethylene diisocyanate. These may be used alone or in combination of two or more.
- m-xylylene diisocyanate represented by the following structural formula, 1,3-bis (1-isocyanato-1-methylethyl) benzene and 1,3-bis (isocyanate) are preferable.
- Natomethyl) cyclohexane 1,3-bis (1-isocyanato-1-methylethyl) benzene and 1,3-bis (isocyanate)
- the amount of the compound (d) used in the present invention is preferably 1 part by mass to 50 parts by mass, more preferably 2 parts by mass, when the total of the compounds (a) and (b) is 100 parts by mass. Part to 30 parts by weight, more preferably 3 parts to 10 parts by weight.
- the amount of the compound (d) is at least 1% by mass or more based on the total amount of the composition for optical materials.
- 1,2,2,6,6-pentamethylpiperidyl-4-methacrylate represented by the following structural formula and bis (2,2,6,6-tetramethyl-) are more preferable.
- 4-piperidyl) sebacate particularly preferred is 1,2,2,6,6-pentamethylpiperidyl-4-methacrylate.
- the compound (e) used in the present invention is 0.001 to 1 part by mass, preferably 0.002 to 1 part by mass with respect to 100 parts by mass in total of the compounds (a) and (b). More preferably, it is 0.005 to 0.5 parts by mass.
- Polymerization catalysts include amines, phosphines, quaternary ammonium salts, quaternary phosphonium salts, condensates of aldehydes and amine compounds, salts of carboxylic acids and ammonia, urethanes, thiourethanes, guanidines, Thioureas, thiazoles, sulfenamides, thiurams, dithiocarbamates, xanthates, tertiary sulfonium salts, secondary iodonium salts, mineral acids, Lewis acids, organic acids, silicic acids, tetrafluoride Examples thereof include boric acids, peroxides, azo compounds, and acidic phosphate esters.
- the polymerization catalyst is not particularly limited as long as it exhibits polymerization and curing. These polymerization catalysts may be used alone or in combination of two or more. Among these, preferred specific examples include tetra-n-butylammonium bromide, triethylbenzylammonium chloride, cetyldimethylbenzylammonium chloride, quaternary ammonium salts such as 1-n-dodecylpyridinium chloride, tetra-n-butylphosphonium bromide, Quaternary phosphonium salts such as tetraphenylphosphonium bromide can be mentioned.
- triethylbenzylammonium chloride and / or tetra-n-butylphosphonium bromide are more preferred specific examples.
- triethylbenzylammonium chloride and / or tetra-n-butylphosphonium bromide are more preferred specific examples.
- the addition amount of the polymerization catalyst is 0.001 to 5 parts by mass, preferably 0.002 to 5 parts per 100 parts by mass in total of the compounds (a), (b), (c) and (d). Parts by mass, more preferably 0.005 to 3 parts by mass.
- composition for an optical material of the present invention may be added with a polymerization regulator as necessary for the purpose of extending the pot life or dispersing the polymerization heat during polymerization and curing. it can.
- the polymerization regulator include halides of Group 13 to 16 elements in the long-term periodic table.
- These polymerization regulators may be used alone or in combination of two or more.
- preferred are halides of silicon, germanium, tin and antimony. More preferred are chlorides of silicon, germanium, tin and antimony, and further preferred are chlorides of germanium, tin and antimony having an alkyl group.
- Specific examples of the most preferred are dibutyltin dichloride, butyltin trichloride, dioctyltin dichloride, octyltin trichloride, dibutyldichlorogermanium, butyltrichlorogermanium, diphenyldichlorogermanium, phenyltrichlorogermanium, triphenylantimony dichloride.
- the addition amount of the polymerization regulator is 0.001 to 5 parts by mass, preferably 0.002 to 5 parts per 100 parts by mass in total of the compounds (a), (b), (c) and (d). Parts by mass, more preferably 0.005 to 3 parts by mass.
- Performance improver In the composition for optical materials of the present invention, a part or all of the compounds of the composition component is used for the purpose of improving various performances such as oxidation resistance, weather resistance, dyeability, strength, and refractive index. It is also possible to add a compound capable of reacting with (performance improving agent). In this case, a known polymerization catalyst can be added separately as necessary for the reaction.
- Compounds (performance improvers) that can react with some or all of the composition components include compounds having two or more mercapto groups other than the thiol of the present invention, epoxy compounds, carboxylic acids, carboxylic acid anhydrides, phenols , Amines, vinyl compounds, allyl compounds, acrylic compounds, methacrylic compounds and the like.
- the amount of the performance improver added is 0.001 to 10 parts by mass, preferably 0.002 to 10 parts by mass with respect to 100 parts by mass in total of the compounds (a), (b), (c) and (d). 5 parts by mass, more preferably 0.005 to 3 parts by mass.
- composition for optical materials of the present invention various additives such as known antioxidants, bluing agents, ultraviolet absorbers, and deodorants are added as optional components as necessary. Of course, it is possible to further improve the practicality of the obtained material. Further, when the optical material of the present invention is easily peeled off from the mold during polymerization, a known external and / or internal adhesion improver is used, or when it is difficult to peel off from the mold, a known external and / or internal mold release is improved. Agents can also be used.
- external and / or internal adhesion improvers and external and / or internal releasability improvers can be applied to glass or metal molds used during polymerization and curing, and the optical material composition of the present invention. It is also effective to improve the adhesiveness or releasability between the obtained optical material and the mold.
- the usage-amount of (a) compound is 10 mass% or more with respect to the whole composition for optical materials.
- (c) a thiol compound is required to copolymerize the compound (d) and improve physical properties such as the color tone of the cured product.
- the content of the compound (c) is desirably 5% by mass or more based on the total amount of the composition for optical materials for the reasons described above, and further, the compound (c) is preferably 8% by mass or more. More desirable.
- the compounds (a), (b), (c) and (d), and optional components used as necessary are mixed and stirred by a usual method. It is necessary that at least a part of the compounds (a) and (b) is preliminarily polymerized with the compound (e) as a catalyst and then mixed with the compound (c) and the compound (d).
- the compound (a) and the compound (b) are preliminarily polymerized in advance using the compound (e) as a catalyst.
- the reaction liquid obtained by this prepolymerization reaction includes the compound (a), the compound (b) and the prepolymerization reaction product. It is necessary to mix the compound (c), the compound (d), and an optional component in the reaction solution obtained by the preliminary polymerization reaction.
- the prepolymerization reaction of the (a) compound and the (b) compound is an effective means for handling the solid (a) compound, and the resulting optical material has good transparency.
- this makes it possible to blend a large amount of the compound (a) (an inorganic compound having sulfur or the like), and to provide an optical material having a high refractive index, high strength, and high heat resistance. Things are obtained.
- the (a) compound and the (b) compound are partly or wholly reacted under stirring or non-stirring.
- a part of the compound (a) or the compound (b) is subjected to a prepolymerization reaction, the remainder of the compound (a) or the compound (b) is separately added and mixed with the composition for optical materials.
- the proportion of the prepolymerization reaction is not particularly limited, but it is preferable that the (a) compound and the (b) compound are prepolymerized so that the compound (a) does not exist as a solid during casting.
- each of the (a) compound and the (b) compound is subjected to the preliminary polymerization reaction, and particularly preferably, all parts by mass of each of the (a) compound and the (b) compound are subjected to the preliminary polymerization reaction.
- the compound (e) which is a prepolymerization reaction catalyst for promoting the reaction between the compound (a) and the compound (b) is added.
- the prepolymerization reaction catalyst (e) compound a hindered amine compound is used, and preferably 1,2,2,6,6-pentamethylpiperidyl-4-methacrylate is used.
- the amount of the prepolymerization reaction catalyst (e) compound added is 0.001 to 1 part by mass, preferably 0.002 to 1 part by mass with respect to 100 parts by mass in total of the compounds (a) and (b). More preferably, it is 0.005 to 0.5 parts by mass.
- the prepolymerization reaction may be performed in the presence of a gas such as air, nitrogen or oxygen, sealed under normal pressure or increased or reduced pressure, or any atmosphere such as reduced pressure. Further, this prepolymerization reaction may be performed in the presence of various additives used as necessary, such as a polymerization regulator, a performance improver, and an ultraviolet absorber. In addition, although it may be carried out in the presence of part or all of the compound (c), in that case, the prepolymerization reaction is carried out by selectively carrying out a part of the polymerization curing reaction, It is desirable to control the reaction by adopting mild conditions.
- the prepolymerization reaction time is 1 minute to 72 hours, preferably 10 minutes to 48 hours, and more preferably 30 minutes to 24 hours.
- the prepolymerization reaction temperature is 0 ° C. to 150 ° C., preferably 10 ° C. to 120 ° C., more preferably 10 ° C. to 80 ° C.
- the compound (a) before the reaction is 100 mol%) by this prepolymerization reaction, and react by 20 mol% or more. Is more preferable.
- liquid chromatography and / or a method for measuring the refractive index is preferable because of high sensitivity, and further, a method for measuring the refractive index is more preferable because it is simple.
- a method for measuring the refractive index it is preferable to use an inline refractometer because the progress of the reaction can be observed in real time.
- composition for optical materials The manufacturing method of the composition for optical materials is as follows in detail.
- Various additives such as UV absorbers and deodorizers are all mixed in the same container at the same time with stirring, or each ingredient is added stepwise and mixed, and then several components are mixed separately and then the same You may remix in a container.
- a preliminary reaction may be performed in advance on two or more types of each component and then mixed.
- the above-mentioned prepolymerization reaction is performed on the compound (a) and the compound (b), and (c) a part of the compound and the performance improver are reacted in advance (not simply mixed), and then mixed. Is also possible.
- the set temperature, the time required for this, etc. may basically be any conditions that allow the components to be sufficiently mixed. However, excessive temperature and time may cause undesirable reactions between the raw materials and additives. It is not suitable for the reason that it becomes easy and the viscosity is increased and the casting operation may be difficult.
- the mixing temperature should be in the range of about ⁇ 50 ° C. to 100 ° C., a preferred temperature range is ⁇ 30 ° C. to 70 ° C., and a more preferred range is ⁇ 5 ° C. to 50 ° C.
- the mixing time is 1 minute to 12 hours, preferably 5 minutes to 10 hours, and most preferably about 5 minutes to 6 hours. If necessary, the active energy ray may be blocked and mixed. After that, deaeration treatment may be performed by the following method.
- a degassing treatment may be performed after the resin composition is produced by the above mixing. It is preferable to deaerate the composition for optical material in advance before polymerization and curing from the viewpoint of achieving high transparency of the optical material obtained by polymerization and curing.
- the deaeration treatment is performed by using (a) compound, (b) compound, (c) compound, (d) compound, and a compound capable of reacting with some or all of various composition components, a polymerization catalyst, a polymerization regulator, and various additives.
- the reaction is performed under reduced pressure. Preferably, it is performed under reduced pressure during or after mixing.
- Degassing conditions are 0 to 100 ° C. under reduced pressure of 0.1 to 15000 Pa for 1 minute to 24 hours.
- the degree of vacuum is preferably 1 to 10000 Pa, more preferably 1 to 5000 Pa, and the degree of vacuum may be varied within these ranges.
- the deaeration time is preferably 5 minutes to 18 hours, more preferably 10 minutes to 12 hours.
- the temperature at the time of deaeration is preferably 5 ° C. to 80 ° C., more preferably 10 ° C. to 60 ° C., and the temperature may be varied within these ranges.
- the components removed by the deaeration treatment are mainly dissolved gases such as hydrogen sulfide and low boiling point substances such as low molecular weight mercaptans, but are not particularly limited as long as the effect of the deaeration treatment is exhibited.
- the optical material composition thus obtained can be purified by filtering impurities and the like immediately before polymerization and curing. It is desirable from the viewpoint of further improving the quality of the optical material of the present invention to purify the optical material composition through a filter to filter impurities and the like.
- the pore size of the filter used here is about 0.05 to 10 ⁇ m, and generally 0.1 to 1.0 ⁇ m is used.
- a filter material PTFE, PET, PP, or the like is preferably used.
- the optical material of the present invention is obtained by polymerizing and curing an optical material composition obtained by the above-described method for producing an optical material composition.
- the composition for optical materials is usually injected into a glass or metal mold and then heated using an electric furnace or irradiated with active energy rays such as ultraviolet rays using an active energy ray generator or the like. Is done by.
- the polymerization time is 0.1 to 100 hours, usually 1 to 48 hours, and the polymerization temperature is ⁇ 10 ° C. to 160 ° C., usually ⁇ 10 ° C. to 140 ° C.
- the polymerization can be carried out by holding at a predetermined polymerization temperature for a predetermined time, raising the temperature from 0.1 ° C. to 100 ° C./h, lowering the temperature from 0.1 ° C. to 100 ° C./h, and combinations thereof.
- annealing the material at a temperature of 50 ° C. to 150 ° C. for about 5 minutes to 5 hours is a preferable treatment for removing distortion of the optical material.
- surface treatments such as dyeing, hard coating, antireflection, antifogging, antifouling and impact resistance can be performed as necessary.
- the refractive index (ne) of the target optical material is preferably 1.73 or more, more preferably 1.74 or more, and the strength is an elongation of 13% or more, more preferably 14 in the three-point bending test. %, More preferably 15% or more, good drilling strength, and heat resistance (softening point of TMA measurement) of 70 ° C. or more.
- An optical material and a lens for two-point frame glasses using the optical material can be provided.
- a homogeneous optical material composition in which a large amount of sulfur as a high refractive index agent is blended (for example, 10% by mass or more based on the total amount of the optical material composition).
- an optical material having a high refractive index of 1.73 or higher can be obtained.
- rapid polymerization occurs when the (a) and (d) compounds are blended in large quantities.
- a cured product (optical material) having a refractive index of 1.73 or more could not be obtained.
- compounds (a) and (b) are preliminarily prepared using a hindered amine compound such as 1,2,2,6,6-pentamethylpiperidyl-4-methacrylate as a catalyst in the production stage of the composition for optical materials.
- a hindered amine compound such as 1,2,2,6,6-pentamethylpiperidyl-4-methacrylate
- the compound can be completely dissolved to form a uniform liquid composition, and it can be cured by polymerization without causing rapid polymerization. New optical materials can be obtained.
- ne is 1.73 or more
- elongation in a three-point bending test is 13% or more
- an optical material having good drilling resistance and high heat resistance can be easily obtained.
- the refractive index and Abbe number, heat resistance, elongation and drill strength of the obtained optical material were evaluated by the following methods.
- Example 1 (A) 20 parts by mass of sulfur as a compound, (b) 80 parts by mass of bis ( ⁇ -epithiopropyl) sulfide (hereinafter referred to as b-1 compound) as a total of 100 parts by mass, and 2- ( 1 part by mass of 2-hydroxy-5-tert-octylphenyl) benzotriazole was added and mixed well at 50 ° C. to make uniform.
- b-1 compound bis ( ⁇ -epithiopropyl) sulfide
- e-1 compound 1,2,2,6,6-pentamethylpiperidyl-4-methacrylate
- e-1 compound a prepolymerization reaction catalyst
- the prepolymerization reaction was carried out at 50 ° C. until no precipitation occurred at 20 ° C.
- the prepolymerization reaction was stopped when about 50 mol% of the compound (a) was reacted, and the compound (a) remained in the obtained composition.
- the reaction ratio of the compound was determined by liquid chromatography analysis and refractive index measurement of the reaction solution.
- c-1 compound m-xylylenedithiol
- d-1 compound m-xylylene diisocyanate
- the obtained optical material composition was filtered through a 1.0 ⁇ m PTFE membrane filter, poured into a 2.5 mm thick plate mold composed of two glass plates and a gasket, and at 30 ° C. After heating for 10 hours, the temperature was raised at a constant rate from 30 ° C. to 100 ° C. over 10 hours, and finally heated at 100 ° C. for 1 hour for polymerization and curing. After cooling to room temperature, the mold was released from the mold to obtain a cured optical material.
- Table 1 shows the evaluation results of the refractive index and Abbe number, heat resistance, elongation and drill strength of the obtained optical material.
- Examples 2 and 3 The same procedure as in Example 1 was performed except that the amounts of the (a) compound and the (b) compound were changed.
- Table 1 shows the evaluation results of the refractive index and Abbe number, heat resistance, elongation and drill strength of the obtained optical material.
- Example 4 The same procedure as in Example 1 was performed except that the amounts of the compound (c) and the compound (d) were changed.
- Table 1 shows the evaluation results of the refractive index and Abbe number, heat resistance, elongation and drill strength of the obtained optical material.
- Example 5 It carried out similarly to Example 1 except changing the quantity of the (e) compound which is a prepolymerization reaction catalyst.
- Table 1 shows the evaluation results of the refractive index and Abbe number, heat resistance, elongation and drill strength of the obtained optical material.
- Example 6 ⁇ Example 6> (B) Instead of the b-1 compound, bis ( ⁇ -epithiopropyl) disulfide (hereinafter referred to as b-2 compound) is used, and the amount of (a) and (b) compound is changed. The same operation as in Example 1 was performed. Table 1 shows the evaluation results of the refractive index and Abbe number, heat resistance, elongation and drill strength of the obtained optical material.
- b-2 compound bis ( ⁇ -epithiopropyl) disulfide
- Example 7 ⁇ Example 7> (D) Instead of the d-1 compound, 1,3-bis (1-isocyanato-1-methylethyl) benzene (hereinafter referred to as d-2 compound) is used, and the amount of (d) compound is The same operation as in Example 4 was performed except that the change was made.
- Table 1 shows the evaluation results of the refractive index and Abbe number, heat resistance, elongation and drill strength of the obtained optical material.
- Example 8> (D) The same procedure as in Example 1 was conducted except that 1,3-bis (isocyanatomethyl) cyclohexane (hereinafter referred to as d-3 compound) was used instead of the d-1 compound.
- Table 1 shows the evaluation results of the refractive index and Abbe number, heat resistance, elongation and drill strength of the obtained optical material.
- Example 9 The same procedure as in Example 1 was performed except that p-xylylenedithiol (hereinafter referred to as c-2 compound) was used instead of the compound c-1.
- Table 1 shows the evaluation results of the refractive index and Abbe number, heat resistance, elongation and drill strength of the obtained optical material.
- Example 10 and 11 Compound c-1 and pentaerythritol tetrakis (3-mercaptopropionate) (hereinafter referred to as c-3 compound) or c-1 compound and 1,2-bis (2-mercaptoethylthio)-
- c-3 compound pentaerythritol tetrakis (3-mercaptopropionate)
- c-4 compound 3-mercaptopropane
- Example 12 ⁇ Example 12> (E) Instead of e-1 compound, bis (2,2,6,6-tetramethyl-4-piperidyl) sebacate (hereinafter referred to as e-2 compound) was used and the amount used was changed. The same operation as in Example 1 was performed. Table 1 shows the evaluation results of the refractive index and Abbe number, heat resistance, elongation and drill strength of the obtained optical material.
- Example 1 shows the evaluation results of the refractive index and Abbe number, heat resistance and elongation of the obtained optical material.
- the obtained optical material had insufficient elongation and drilling strength.
- the obtained composition was cooled to 20 ° C. Then, 0.03 parts by mass of triethylbenzylammonium chloride as a polymerization catalyst and 0.20 parts by mass of di-n-butyltin dichloride as a polymerization regulator were dissolved in 7 parts by mass of c-1 compound as a master batch. The mixture was mixed to obtain a uniform composition, and degassed at 4000 Pa for 30 minutes at 20 ° C. Thereafter, polymerization and curing were performed in the same manner as in Example 1 to obtain a cured optical material. Table 1 shows the evaluation results of the refractive index and Abbe number, heat resistance, elongation and drill strength of the obtained optical material. The obtained optical material had insufficient elongation.
- Comparative Example 4 was repeated except that the composition shown in Table 1 was changed.
- Table 1 shows the evaluation results of the refractive index and Abbe number, heat resistance, elongation and drill strength of the obtained optical material. Some of the obtained optical materials had a low refractive index and insufficient elongation.
- Comparative Example 7 Comparative Example 4 was repeated except that the composition shown in Table 1 was changed. (A) The compound was cured by polymerization with the compound remaining undissolved, and a uniform transparent optical material could not be obtained.
- composition for an optical material according to the production method of the present invention can provide an optical material having excellent characteristics such as a high refractive index, high strength, and high heat resistance by polymerizing and curing.
- Such an optical material of the present invention is suitable as an optical material for plastic lenses, prisms, optical fibers, information recording substrates, filters, and the like, and is particularly suitable for plastic lenses, particularly lenses for two-point frame glasses.
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Abstract
Description
したがって、前記文献の製造方法では、急速重合あるいは高粘度化が起こるため、硫黄原子および/またはセレン原子を有する無機化合物、エピスルフィド化合物、チオール化合物およびイソシアネート化合物の4成分からなる屈折率1.73以上の光学材料を実用的に製造することは困難であった。そのため屈折率1.73以上であり、強度と耐熱性を付与したレンズの製造方法の開発が求められていた。
(a)硫黄原子を有する無機化合物
(b)エピスルフィド基を1分子中に1個以上有するエピスルフィド化合物
(c)メルカプト基を1分子あたり1個以上有するチオール化合物
(d)イソシアネート基を1分子あたり1個以上有するイソシアネート化合
[6]:ツーポイントフレームに装着可能な強度を有する[5]記載のメガネ用レンズ。
本発明の光学材料用組成物の製造方法は、原料として、(a)硫黄原子を有する無機化合物(以下、(a)化合物)、(b)エピスルフィド基を1分子中に1個以上有するエピスルフィド化合物(以下、(b)化合物)、(c)メルカプト基を1分子あたり1個以上有するチオール化合物(以下、(c)化合物)、(d)イソシアネート基を1分子あたり1個以上有するイソシアネート化合物(以下、(d)化合物)を用いる。また、(a)化合物と(b)化合物とを予備重合反応させるための触媒として(e)ヒンダードアミン化合物(以下、(e)化合物)を用いる。
さらに必要に応じて重合触媒、重合調節剤、性能改良剤等の任意成分を用いる。
本発明で使用する(a)化合物である硫黄原子を有する無機化合物は、硫黄原子を1個以上有する全ての無機化合物を包含する。(a)化合物は、化合物中の硫黄原子の合計質量の割合が30質量%以上であることが好ましい。この割合が、30質量%未満である場合、光学材料用組成物中の硫黄原子の質量の割合上昇分が小さいため、光学材料の高屈折率化の効果が小さくなる場合がある。(a)化合物の使用量は、(a)および(b)化合物の合計を100質量部とした場合、10~50質量部使用するが、好ましくは10~40質量部、より好ましくは10~30質量部である。
これら硫黄原子を有する無機化合物は、単独でも、2種類以上を混合して使用しても良い。
本発明で使用する(b)化合物としては、エピスルフィド基を1分子中に1個以上有するエピスルフィド化合物を全て包括するが、好ましくは1分子中に2個のエピスルフィド基を有する化合物であり、具体的にはビス(β-エピチオプロピル)スルフィド、ビス(β-エピチオプロピル)ジスルフィド、ビス(β-エピチオプロピル)トリスルフィド、ビス(β-エピチオプロピルチオ)メタン、1,2-ビス(β-エピチオプロピルチオ)エタン、1,3-ビス(β-エピチオプロピルチオ)プロパン、1,2-ビス(β-エピチオプロピルチオ)プロパン、1,4-ビス(β-エピチオプロピルチオ)ブタン、およびビス(β-エピチオプロピルチオエチル)スルフィドからなる群から選択される1種以上のエピスルフィド化合物が挙げられる。これらは単独でも、2種類以上を混合して使用してもかまわない。
本発明で使用する(c)化合物は、メルカプト基を1分子あたり1個以上有するチオール化合物を全て包括するが、好ましくは1分子中に2個以上のメルカプト基を有する化合物であり、具体的にはm-キシリレンジチオール、p-キシリレンジチオール、o-キシリレンジチオール、ビス(2-メルカプトエチル)スルフィド、ペンタエリスリトールテトラキス(2-メルカプトアセテート)、ペンタエリスリトールテトラキス(3-メルカプトプロピオネート)、および1,2-ビス(2-メルカプトエチルチオ)-3-メルカプトプロパンなどのポリチオール化合物から選択される1種以上である。これらは単独でも、2種類以上を混合して使用してもかまわない。
本発明で使用する(d)化合物は、イソシアネート基を1分子あたり1個以上有するイソシアネート化合物を全て包括するが、好ましくは1分子中に2個のイソシアネート基を有する化合物であり、具体的にはキシリレンジイソシアネート化合物、1,3-ビス(イソシアナトメチル)シクロヘキサン、イソホロンジイソシアネート、およびヘキサメチレンジイソシアネートなどのジイソシアネート化合物から選択される1種以上である。これらは単独でも、2種類以上を混合して使用してもかまわない。
(a)化合物と(b)化合物との予備重合反応を促進させる、ヒンダードアミンである(e)化合物としては、1,2,2,6,6-ペンタメチルピペリジル-4-メタクリレート、ビス(2,2,6,6-テトラメチル-4-ピペリジル)セバケート、ビス(1,2,2,6,6-ペンタメチル-4-ピペリジル)セバケート、ビス(1,2,2,6,6-ペンタメチル-4-ピペリジル)-2-(3,5-ジ-tert-ブチル-4-ヒドロキシベンジル)-2-n-ブチルマロネート、1-メチル-8-(1,2,2,6,6-ペンタメチル-4-ピペリジル)-セバケート、1-[2-〔3-(3,5-ジ-tert-ブチル-4-ヒドロキシフェニル)プロピオニルオキシ〕エチル]-4-〔3-(3,5-ジ-tert-ブチル-4-ヒドロキシフェニル)プロピオニルオキシ〕-2,2,6,6-テトラメチルピペリジン、4-ベンゾイルオキシ-2,2,6,6-テトラメチルピペリジン、テトラキス(2,2,6,6-テトラメチル-4-ピペリジル)-1,2,3,4-ブタン-テトラカルボキシレート、トリエチレンジアミン、8-アセチル-3-ドデシル-7,7,9,9-テトラメチル-1,3,8-トリアザスピロ[4,5]デカン-2,4-ジオンなどのヒンダードアミンから選択される1種以上のヒンダードアミン化合物が用いられる。中でもより好ましいのは下記構造式で表される1,2,2,6,6-ペンタメチルピペリジル-4-メタクリレート(式(6))、およびビス(2,2,6,6-テトラメチル-4-ピペリジル)セバケートであり、特に好ましいのは、1,2,2,6,6-ペンタメチルピペリジル-4-メタクリレートである。
本発明の光学材料用組成物には、重合硬化のために、必要に応じて重合触媒を添加することができる。重合触媒としては、アミン類、ホスフィン類、第4級アンモニウム塩類、第4級ホスホニウム塩類、アルデヒドとアミン系化合物の縮合物、カルボン酸とアンモニアとの塩、ウレタン類、チオウレタン類、グアニジン類、チオ尿素類、チアゾール類、スルフェンアミド類、チウラム類、ジチオカルバミン酸塩類、キサントゲン酸塩、第3級スルホニウム塩類、第2級ヨードニウム塩類、鉱酸類、ルイス酸類、有機酸類、ケイ酸類、四フッ化ホウ酸類、過酸化物、アゾ系化合物、酸性リン酸エステル類を挙げることができる。
本発明の光学材料用組成物には、重合硬化する際に、ポットライフの延長や重合発熱の分散化などを目的として、必要に応じて重合調節剤を添加することができる。重合調節剤は、長期周期律表における第13~16族元素のハロゲン化物を挙げることができる。
本発明の光学材料用組成物には、耐酸化性、耐候性、染色性、強度、屈折率等の各種性能の改良を目的として、組成成分の化合物の一部もしくは全部と反応可能な化合物(性能改良剤)を添加することも可能である。この場合は、反応のために必要に応じて公知の重合触媒を別途加えることができる。
本発明の光学材料用組成物においては、任意成分として、公知の酸化防止剤、ブルーイング剤、紫外線吸収剤、消臭剤等の各種添加剤を必要に応じて加え、得られる材料の実用性をより向上せしめることはもちろん可能である。
また、本発明の光学材料が重合中に型から剥がれやすい場合には公知の外部および/または内部密着性改善剤を、または型から剥がれにくい場合には公知の外部および/または内部離型性改善剤を、使用することもできる。これらの外部および/または内部密着性改善剤や外部および/または内部離型性改善剤は、重合硬化時に用いるガラスもしくは金属製の型に塗布することができるほか、本発明の光学材料用組成物に添加して、得られる光学材料と型の密着性または離型性を向上せしめることも有効である。
また、(d)イソシアネート化合物の含有量が光学材料用組成物全量に対し1質量%以上であることが、硬化物の強度の面から必要であり、更には(d)化合物が2質量%以上であることが望ましい。
また(d)化合物を共重合せしめるとともに硬化物の色調などの物性を向上させるため、(c)チオール化合物が必要となる。(c)化合物の含有量は先に述べたような理由から、光学材料用組成物全量に対し5質量%以上であることが望ましく、更には(c)化合物が8質量%以上であることがより望ましい。
本発明の光学材料用組成物の製造にあたっては、あらかじめ(a)化合物と(b)化合物とを(e)化合物を触媒として予備重合反応させる。この予備重合反応で得られる反応液には(a)化合物、(b)化合物および予備重合反応物が含まれる。予備重合反応で得られた反応液に、(c)化合物、(d)化合物、及び任意成分とを混合することが必要である。(a)化合物と(b)化合物を予備重合反応させることは、固体の(a)化合物をハンドリングする際には有効な手段であり、得られる光学材料の透明性も良好となる。また、これにより(a)化合物(硫黄等を有する無機化合物)を多量に配合することが可能となり、高屈折率、高強度、及び高耐熱性を備えた光学材料を提供しうる光学材料用組成物が得られる。
予備重合反応させる割合は特に制限されないが、注型時に(a)化合物が固体として存在しない程度に(a)化合物と(b)化合物とを予備重合反応させるのが好ましい。更に好ましくは、(a)化合物、(b)化合物それぞれ50~100質量%が予備重合反応に供され、特に好ましくは(a)化合物、(b)化合物それぞれ全質量部が予備重合反応に供される。
光学材料用組成物の製造方法は、詳しく述べるならば以下の通りである。(a)化合物と(b)化合物、および(a)化合物と(b)化合物を予備重合反応して得られる予備重合反応物を含む反応液、(c)化合物、(d)化合物、性能改良剤(組成成分の一部もしくは全部と反応可能な化合物)、予備重合反応触媒(e)化合物、重合触媒、重合調節剤、密着性改善剤または離型性改善剤、酸化防止剤、ブルーイング剤、紫外線吸収剤、消臭剤等の各種添加剤等は、全て同一容器内で同時に撹拌下に混合しても、各原料を段階的に添加混合しても、数成分を別々に混合後さらに同一容器内で再混合しても良い。各原料および添加剤等はいかなる順序で混合しても構わない。さらに、上述した(a)化合物と(b)化合物の組み合わせによる予備重合反応以外にも、各成分の2種類以上についてあらかじめ予備的な反応を行った後、混合しても構わない。例えば(a)化合物と(b)化合物について上記予備重合反応を行い、別途(c)化合物の一部と性能改良剤を(単に混合するのではなく)予備的に反応させ、それらを混合することも可能である。
本発明の光学材料用組成物の製造方法においては、上記混合により樹脂組成物を製造後、脱気処理を行う場合がある。光学材料用組成物を重合硬化前にあらかじめ脱気処理することは、重合硬化して得られる光学材料の高度な透明性を達成する面から好ましい。
脱気処理は、(a)化合物、(b)化合物、(c)化合物、(d)化合物、および各種組成成分の一部もしくは全部と反応可能な化合物、重合触媒、重合調節剤、各種添加剤の混合前、混合時あるいは混合後に、減圧下に行う。好ましくは、混合時あるいは混合後に、減圧下に行う。
脱気処理により、除去される成分は、主に硫化水素等の溶存ガスや低分子量のメルカプタン等の低沸点物等であるが、脱気処理の効果を発現するのであれば、特に限定されない。
本発明の光学材料は、上記光学材料用組成物の製造方法で得られる光学材料用組成物を重合硬化して得られる。重合硬化は通常、光学材料用組成物をガラスや金属製の型に注入後、電気炉を用いて加熱したり、活性エネルギー線発生装置等を用いて紫外線などの活性エネルギー線を照射したりすることによって行われる。重合時間は0.1~100時間、通常1~48時間であり、重合温度は-10℃~160℃、通常-10℃~140℃である。重合は所定の重合温度で所定時間のホールド、0.1℃~100℃/hの昇温、0.1℃~100℃/hの降温およびこれらの組み合わせで行うことができる。
従来の(a)化合物、(b)化合物、(c)化合物、(d)化合物からなる組成物とその製造方法では、(a)化合物と(d)化合物を多量に配合すると、急速重合が起こり、屈折率1.73以上の硬化物(光学材料)を得ることはできなかった。
本発明によれば、光学材料用組成物の製造段階で(a)化合物と(b)化合物を1,2,2,6,6-ペンタメチルピペリジル-4-メタクリレートなどのヒンダードアミン化合物を触媒として予備重合反応させて適量を消費することによって、(a)化合物を完全に溶解させ、均一な液体組成物とすることが可能であり、かつ急速重合を起こすことなく重合硬化が可能であり、透明均一な光学材料を得ることが可能となった。
このように、本発明の特徴的な組成・製造方法を採用することにより、高屈折率(neが1.73以上)を達成し、さらに高強度(3点曲げ試験の伸びが13%以上、及び耐ドリル強度が良好)、および高耐熱性をも有する光学材料が容易に得られる。
デジタル精密屈折計(カルニュー光学工業株式会社製、KPR-200)を用い、25℃で測定した。
サンプルを厚さ3mmに切り出し、1mmφのピンに10gの加重を与え、30℃から10℃/分で昇温してTMA測定(セイコーインスツルメンツ製、TMA/SS6100)を行い、軟化点を測定した。
JIS規格K-7171に準拠し、厚さ2.5mm、幅10.0mmの平板を、オートグラフ(株式会社島津製作所製、AG-5000B)を用い、支点間距離40mmにおいて3点曲げ試験を行い、破断点の伸びを測定した。
[耐ドリル強度]
特開2008-101190号公報に示されている評価方法に準拠して、ドリルの回転数2500rpm、進入速度600mm/分で2.5mm厚の平板に直径2mmの穴を開けたときの周辺部の状態を測定した。周辺部に欠けが見られないものを○、見られたものを×とした。
(a)化合物として硫黄20質量部、(b)化合物としてビス(β-エピチオプロピル)スルフィド(以下b-1化合物と呼ぶ)80質量部の合計100質量部に、紫外線吸収剤として2-(2-ヒドロキシ-5-tert-オクチルフェニル)ベンゾトリアゾール1質量部を加え、50℃でよく混合し均一とした。次いで、予備重合反応触媒(e)化合物として1,2,2,6,6-ペンタメチルピペリジル-4-メタクリレート(以下e-1化合物と呼ぶ)0.01質量部を加え、(a)化合物が20℃において析出しなくなるまで50℃で予備重合反応させた。
なお、本実施例では、予備重合反応を(a)化合物が約50モル%反応したところで停止させており、得られた組成物中には(a)化合物が残存した状態にある。(a)化合物の反応割合は、反応液を液体クロマトグラフィー分析ならびに屈折率を測定することにより求めた。
(a)化合物と(b)化合物の量を変更する以外は実施例1と同様に行った。得られた光学材料の屈折率およびアッベ数、耐熱性、伸びおよび耐ドリル強度の評価結果を表1に示した。
(c)化合物と(d)化合物の量を変更する以外は実施例1と同様に行った。得られた光学材料の屈折率およびアッベ数、耐熱性、伸びおよび耐ドリル強度の評価結果を表1に示した。
予備重合反応触媒である(e)化合物の量を変更する以外は実施例1と同様に行った。得られた光学材料の屈折率およびアッベ数、耐熱性、伸びおよび耐ドリル強度の評価結果を表1に示した。
(b)化合物のb-1化合物の代わりに、ビス(β-エピチオプロピル)ジスルフィド(以下b-2化合物と呼ぶ)を使用し、(a)および(b)化合物の量を変更する以外は実施例1と同様に行った。得られた光学材料の屈折率およびアッベ数、耐熱性、伸びおよび耐ドリル強度の評価結果を表1に示した。
(d)化合物のd-1化合物の代わりに、1,3-ビス(1-イソシアナート-1-メチルエチル)ベンゼン(以下d-2化合物と呼ぶ)を使用し、(d)化合物の量を変更する以外は実施例4と同様に行った。得られた光学材料の屈折率およびアッベ数、耐熱性、伸びおよび耐ドリル強度の評価結果を表1に示した。
(d)化合物のd-1化合物の代わりに、1,3-ビス(イソシアナトメチル)シクロヘキサン(以下d-3化合物と呼ぶ)を使用する以外は実施例1と同様に行った。得られた光学材料の屈折率およびアッベ数、耐熱性、伸びおよび耐ドリル強度の評価結果を表1に示した。
(c)化合物のc-1化合物の代わりに、p-キシリレンジチオール(以下c-2化合物と呼ぶ)を使用する以外は実施例1と同様に行った。得られた光学材料の屈折率およびアッベ数、耐熱性、伸びおよび耐ドリル強度の評価結果を表1に示した。
(c)化合物を、c-1化合物とペンタエリスリトールテトラキス(3-メルカプトプロピオネート)(以下c-3化合物と呼ぶ)あるいはc-1化合物と1,2-ビス(2-メルカプトエチルチオ)-3-メルカプトプロパン(以下c-4化合物と呼ぶ)のように2種類の(c)化合物を併用する、かつ各化合物の質量部を変更する以外は実施例1と同様に行った。得られた光学材料の屈折率およびアッベ数、耐熱性、伸びおよび耐ドリル強度の評価結果を表1に示した。
(e)化合物のe-1化合物の代わりにビス(2,2,6,6-テトラメチル-4-ピペリジル)セバケート(以下e-2化合物と呼ぶ)を使用し、使用量を変更する以外は実施例1と同様に行った。得られた光学材料の屈折率およびアッベ数、耐熱性、伸びおよび耐ドリル強度の評価結果を表1に示した。
(a)化合物として硫黄15質量部、(b)化合物としてb-1化合物85質量部の合計100質量部に、紫外線吸収剤として2-(2-ヒドロキシ-5-tert-オクチルフェニル)ベンゾトリアゾール1質量部を加え、60℃でよく混合し均一とした。次いで、予備重合反応触媒として2-メルカプト-1-メチルイミダゾール(以下e-3化合物と呼ぶ)0.5質量部を加え、(a)化合物が20℃において析出しなくなるまで50℃で予備重合反応させた。その後、得られた組成物を20℃に冷却した。そこへ、重合触媒としてトリエチルベンジルアンモニウムクロライド0.03質量部、重合調節剤としてジ-n-ブチルスズジクロライド0.20質量部を溶解させ、実施例1と同様に重合硬化させた。
得られた光学材料の屈折率およびアッベ数、耐熱性および伸びの評価結果を表1に示した。得られた光学材料は伸びおよび耐ドリル強度が不十分であった。
(a)化合物として硫黄16質量部、(b)化合物としてb-1化合物84質量部の合計100質量部に、紫外線吸収剤として2-(2-ヒドロキシ-5-tert-オクチルフェニル)ベンゾトリアゾール1質量部を加え、60℃でよく混合し均一とした。次いで、e-3化合物0.5質量部を加え、(a)化合物が20℃において析出しなくなるまで60℃で予備重合反応させた。
(c)化合物のc-1化合物の代わりに、ビス(2-メルカプトエチル)スルフィド(以下c-5化合物と呼ぶ)を使用する以外は比較例2と同様に行った。得られた光学材料の屈折率およびアッベ数、耐熱性、伸びおよび耐ドリル強度の評価結果を表1に示した。得られた光学材料は伸びおよび耐ドリル強度が不十分であった。
(b)化合物としてb-1化合物100質量部、(c)化合物としてc-1化合物16質量部、内部離型剤としてポリオキシエチレンラウリルエーテルリン酸ナトリウム0.005質量部、重合触媒としてテトラ-n-ブチルアンモニウムブロマイド0.03質量部、重合調節剤としてジ-n-ブチルスズジクロライド0.05質量部を混合し、均一な組成物とし1300Paの減圧下で30分脱気を行った後、実施例1と同様に重合硬化させた。得られた光学材料の屈折率およびアッベ数、耐熱性、伸びおよび耐ドリル強度の評価結果を表1に示した。得られた光学材料は屈折率および耐熱性が不十分であった。
表1に示した組成に変更した以外は比較例4を繰り返した。得られた光学材料の屈折率およびアッベ数、耐熱性、伸びおよび耐ドリル強度の評価結果を表1に示した。得られた光学材料はいずれも屈折率が低く、伸びが不十分なものもあった。
表1に示した組成に変更した以外は比較例4を繰り返した。(a)化合物が溶け残ったまま重合硬化してしまい、均一透明な光学材料は得られなかった。
比較例2と同様に予備重合反応を行い、得られた組成物を20℃に冷却した。そこへ、あらかじめ重合触媒としてトリエチルベンジルアンモニウムクロライド0.03質量部、重合調節剤としてジ-n-ブチルスズジクロライド0.20質量部をc-1化合物9質量部に溶解させたものを、マスターバッチとして加え、次いでd-1化合物3質量部を順に加え混合したが、急速重合が起こり、光学材料は得られなかった。
(a)硫黄
(b-1)ビス(β-エピチオプロピル)スルフィド
(b-2)ビス(β-エピチオプロピル)ジスルフィド
(c-1)m-キシリレンジチオール
(c-2)p-キシリレンジチオール
(c-3)ペンタエリスリトールテトラキス(3-メルカプトプロピオネート)
(c-4)1,2-ビス(2-メルカプトエチルチオ)-3-メルカプトプロパン
(c-5)ビス(2-メルカプトエチル)スルフィド
(d-1)m-キシリレンジイソシアネート
(d-2)1,3-ビス(1-イソシアナート-1-メチルエチル)ベンゼン
(d-3)1,3-ビス(イソシアナトメチル)シクロヘキサン
(e-1)1,2,2,6,6-ペンタメチルピペリジル-4-メタクリレート
(e-2)ビス(2,2,6,6-テトラメチル-4-ピペリジル)セバケート
(e-3)2-メルカプト-1-メチルイミダゾール
Claims (6)
- 下記(a)化合物10~50質量部(ただし光学材料用組成物全量に対して10質量%以上)、下記(b)化合物50~90質量部、下記(c)化合物1~50質量部および下記(d)化合物1~50質量部(ただし光学材料用組成物全量に対して1質量%以上)を原料とする光学材料用組成物の製造方法であって(ただし、質量部は(a)化合物と(b)化合物との合計量を100質量部とした値)、下記(a)化合物と下記(b)化合物とをヒンダードアミンを触媒として予備重合反応させて得られた反応液と下記(c)化合物および下記(d)化合物を混合することを特徴とする光学材料用組成物の製造方法。
(a)硫黄原子を有する無機化合物
(b)エピスルフィド基を1分子中に1個以上有するエピスルフィド化合物
(c)メルカプト基を1分子あたり1個以上有するチオール化合物
(d)イソシアネート基を1分子あたり1個以上有するイソシアネート化合物 - 前記ヒンダードアミンが、1,2,2,6,6-ペンタメチルピペリジル-4-メタクリレートであることを特徴とする請求項1記載の光学材料用組成物の製造方法。
- 請求項1または2記載の光学材料用組成物の製造方法により光学材料用組成物を製造する工程と、得られた光学材料用組成物を重合硬化させる工程とを含む光学材料の製造方法。
- 請求項3記載の製造方法によって得られる光学材料であって、屈折率(ne)が1.73以上である、光学材料。
- 請求項4記載の光学材料を含むメガネ用レンズ。
- ツーポイントフレームに装着可能な強度を有する請求項5記載のメガネ用レンズ。
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JP2013189630A (ja) * | 2012-02-14 | 2013-09-26 | Mitsubishi Gas Chemical Co Inc | 光学材料用重合性組成物 |
KR20160114144A (ko) | 2014-03-11 | 2016-10-04 | 미쯔이가가꾸가부시끼가이샤 | 광학 재료용 중합성 조성물 및 광학 재료 |
US10266636B2 (en) | 2014-03-11 | 2019-04-23 | Mitsui Chemicals, Inc. | Process for producing episulfide compound for optical material, episulfide-containing composition, and polymerizable composition for optical material including the same composition |
KR20180113569A (ko) | 2016-03-18 | 2018-10-16 | 미쯔이가가꾸가부시끼가이샤 | (폴리)술피드 화합물의 제조 방법 및 에피술피드 화합물의 제조 방법 |
US10844010B2 (en) | 2016-03-18 | 2020-11-24 | Mitsui Chemicals, Inc. | Process for producing (poly)sulfide compound and process for producing episulfide compound |
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US9458293B2 (en) | 2016-10-04 |
EP2810972B1 (en) | 2016-11-02 |
JPWO2013115212A1 (ja) | 2015-05-11 |
JP5817850B2 (ja) | 2015-11-18 |
EP2810972A1 (en) | 2014-12-10 |
CN104080837B (zh) | 2016-06-15 |
BR112014018872A2 (ja) | 2017-06-20 |
US20140378628A1 (en) | 2014-12-25 |
KR20140117463A (ko) | 2014-10-07 |
EP2810972A4 (en) | 2015-09-09 |
IN2014DN06876A (ja) | 2015-05-22 |
KR101561636B1 (ko) | 2015-10-20 |
CN104080837A (zh) | 2014-10-01 |
BR112014018872B1 (pt) | 2021-03-02 |
BR112014018872A8 (pt) | 2017-07-11 |
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