CN107502174B - Water-based PU elastic coating and preparation method thereof - Google Patents
Water-based PU elastic coating and preparation method thereof Download PDFInfo
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- CN107502174B CN107502174B CN201710893592.8A CN201710893592A CN107502174B CN 107502174 B CN107502174 B CN 107502174B CN 201710893592 A CN201710893592 A CN 201710893592A CN 107502174 B CN107502174 B CN 107502174B
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/06—Polyurethanes from polyesters
-
- 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
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
-
- 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
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/44—Polycarbonates
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/02—Emulsion paints including aerosols
- C09D5/024—Emulsion paints including aerosols characterised by the additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Dispersion Chemistry (AREA)
- Paints Or Removers (AREA)
- Cosmetics (AREA)
Abstract
The invention discloses a water-based PU elastic coating and a preparation method thereof, wherein the water-based PU elastic coating comprises the following components: the water-based polyurethane coating comprises water-based polyester resin, water-dispersible polycarbonate dihydric alcohol, a dispersing agent, matting powder, a wetting agent, a leveling agent, an organic cosolvent, an anti-settling agent, polyurethane particles, an ammonia neutralizing agent and water-dispersible isocyanate; the invention overcomes the defects and shortcomings in the prior art, the VOC content of the aqueous PU elastic coating is less than 150g/L, which is reduced by 60-70% compared with the traditional solvent PU elastic coating, the pollutant emission of enterprises is reduced, after the aqueous PU elastic coating is dried, the surface of the coating film feels smooth, the elasticity is better, the water resistance, the alcohol resistance and the physical and chemical properties of the coating film are excellent, and the coating film passes the relevant detection standards of cosmetic coatings.
Description
Technical Field
The invention relates to a water-based PU elastic coating and a preparation method thereof, belonging to the technical field of cosmetics.
Background
In the existing production process, the ABS base material of cosmetics is mostly sprayed by using a solvent type PU elastic coating, the VOC (volatile organic compound) content of the solvent type PU elastic coating is 500-600 g/L, the organic solvent content is high, and pollutants are discharged and amplified.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and adopts a first technical scheme that: the water-based PU elastic coating comprises a component A and a component B, wherein the component A comprises the following components in percentage by weight: 40-55% of water-based polyester resin, 10-15% of water dispersible polycarbonate diol, 1-2% of dispersing agent, 5-7% of flatting agent, 0.5-1% of wetting agent, 0.5-1% of flatting agent, 5-10% of organic cosolvent, 1-2% of anti-settling agent, 2-5% of polyurethane particles, 10-20% of pure water and 0.5-1% of ammonia neutralizer.
The preferable technical scheme is as follows: the component B comprises the following components in percentage by weight: 75-80% of water dispersible isocyanate and 20-25% of pure water.
The second technical scheme adopted by the invention is as follows: a preparation method of a water-based PU elastic coating comprises the following steps:
component A
The first step is as follows: adding water dispersible polycarbonate diol into a clean container, slowly adding pure water, stirring to prepare a water dispersible polycarbonate diol semi-finished product, and filtering for later use;
the second step is that: adding water-based polyester resin into a clean container, sequentially adding a dispersing agent, an anti-settling agent and an organic cosolvent under a stirring state, and stirring;
the third step: under the stirring state, slowly and sequentially adding matting powder and polyurethane particles, and stirring;
the fourth step: slowly adding the water dispersible polycarbonate diol semi-finished product prepared in the first step under stirring, and stirring;
the fifth step: slowly adding the flatting agent and stirring;
and a sixth step: adding ammonia neutralizer, adjusting pH value, stirring, filtering and packaging;
b component
The seventh step: adding water dispersible polyisocyanate into a clean container, slowly adding pure water, stirring, filtering and packaging;
eighth step: the elastic coating is mixed according to the ratio of 5: 1: 0.5-1 of the component A, the component B and pure water.
The preferable technical scheme is as follows: and the ambient temperature from the first step to the eighth step is 15-35 ℃.
The preferable technical scheme is as follows: standing at room temperature for at least 30 minutes before filtering in the first step, the sixth step and the seventh step, and filtering by using a 300-mesh filter screen.
The preferable technical scheme is as follows: the stirring speed of the first step and the seventh step is 800 revolutions per minute, and the stirring time is 10-15 minutes.
The preferable technical scheme is as follows: and in the second step, the fourth step, the fifth step and the sixth step, the stirring speed is 500 revolutions per minute, and the stirring time is 5-10 minutes.
The preferable technical scheme is as follows: and in the third step, stirring is carried out for 90-120 minutes at a rotating speed of 1000 revolutions per minute, and then stirring is carried out for 10-15 minutes at a rotating speed of 300 revolutions per minute.
The preferable technical scheme is as follows: the PU elastic coating can be sprayed on an ABS base material of cosmetics and forms a coating film with excellent physical and chemical properties after being dried.
Due to the application of the technical scheme, the invention has the following advantages:
the water-based PU elastic coating replaces the existing solvent-based PU elastic coating, the VOC content of the water-based PU elastic coating is less than 150g/L, the VOC is reduced by 60-70% compared with the VOC of the traditional solvent PU elastic coating, the pollutant emission of enterprises is reduced, after the water-based PU elastic coating is dried, the surface of a coating film feels smooth, the elasticity is better, the water resistance, the alcohol resistance and the physical and chemical properties of the coating film are excellent, and the coating film passes the relevant detection standard of cosmetic coatings.
Detailed Description
Example (b): the invention provides a water-based PU elastic coating, which comprises the following components in percentage by weight according to different embodiments, as detailed in Table 1:
table 1: component A
The waterborne polyester resin adopts Nanchang Yushi technology PS2100B, and the coating film has the advantages of high curing speed and good elasticity; the water dispersible polycarbonate diol is prepared by adopting Japanese Asahi to be converted into PCDX-103 and compounding with water-based polyester PS-2100B, so that the adhesive force, water resistance and chemical resistance of a coating film are improved; the special polyurethane particles adopt C series of Nissan Shang company, and after the coating is formed into a film, the coating surface is uniformly distributed, so that the silky hand feeling of the coating is provided; the matting powder is E-1011 from Tosoh corporation of Japan; the wetting agent adopts Tego280 of German Digao company; the leveling agent adopts BYK-347 of BYK company; the dispersant adopts BYK-190 of BYK company; the ammonia neutralizer is HAIMENDED (N-methyl-ethyl-amino) DMAE; as the water-dispersible isocyanate, DNW-5500 manufactured by NIPPA DIC was used.
According to the formula in the above embodiment, the specific preparation method is as follows:
component A
The first step is as follows: taking a clean container, adding water dispersible polycarbonate dihydric alcohol at the ambient temperature of 15-35 ℃, slowly adding pure water at the rotating speed of 800 rpm under the stirring state at the rotating speed of 500 rpm, stirring for 10-15 minutes to prepare a water dispersible polycarbonate dihydric alcohol semi-finished product, standing for 30 minutes at room temperature, and filtering with a 300-mesh filter screen for later use;
the second step is that: taking a clean container, adding water-based polyester resin at the ambient temperature of 15-35 ℃, sequentially adding a dispersant, an anti-settling agent and an organic cosolvent under the stirring state at the rotating speed of 500 revolutions per minute, stirring for 5-10 minutes,
the third step: under the stirring state, slowly adding flatting powder and polyurethane particles in sequence, firstly stirring for 90-120 minutes at the rotating speed of 1000 revolutions per minute, and then stirring for 10-15 minutes at the rotating speed of 300 revolutions per minute;
the fourth step: slowly adding the mixture into the first step to prepare a water dispersible polycarbonate diol semi-finished product under stirring, stirring at the rotating speed of 500 r/min for 5-10 min,
the fifth step: slowly adding the flatting agent, stirring for 5-10 minutes at the rotating speed of 500 revolutions per minute at the temperature of 15-35 ℃,
and a sixth step: and finally, adding an ammonia neutralizing agent to adjust the pH value to 7.5-8, stirring at the temperature of 15-35 ℃ for 5-10 minutes at the rotating speed of 500 revolutions per minute, cooling the coating to room temperature, detecting, filtering the coating twice by a 300-mesh filter screen, and packaging.
B component
The seventh step: taking a clean container, adding water dispersible polyisocyanate at the ambient temperature of 15-35 ℃ and the air humidity of below 70%, slowly adding pure water under the stirring state at the rotating speed of 500 r/min, stirring for 10-15 min at the rotating speed of 800 r/min, standing for 30 min at room temperature, filtering by a 300-mesh filter screen, and packaging.
According to the above embodiment and in combination with the above preparation method, the aqueous PU elastic coating prepared by mixing the component A, the component B and pure water in the ratio of 5: 1: 0.5-1 is sprayed on the ABS base material of cosmetics, and after forced drying in an oven, a coating film is prepared, and the performance parameters of the obtained coating film are shown in Table 2:
TABLE 2
The VOC content of the aqueous PU elastic coating is less than 150g/L, which is reduced by 60-70% compared with the traditional solvent PU elastic coating, the pollutant emission of enterprises is reduced, after the aqueous PU elastic coating is dried, the surface of the coating film feels silky, the elasticity is better, the water resistance, the alcohol resistance and the physical and chemical properties of the coating film are excellent, and the coating film passes the relevant detection standards of cosmetic coatings.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (4)
1. The water-based PU elastic coating is characterized by comprising a component A and a component B, wherein the component A comprises the following components in percentage by weight: 40-55% of water-based polyester resin, 10-15% of water dispersible polycarbonate diol, 1-2% of dispersing agent, 5-7% of flatting agent, 0.5-1% of wetting agent, 0.5-1% of flatting agent, 5-10% of organic cosolvent, 1-2% of anti-settling agent, 2-5% of polyurethane particles, 10-20% of pure water and 0.5-1% of ammonia neutralizer;
the component B comprises the following components in percentage by weight: 75-80% of water dispersible isocyanate and 20-25% of pure water;
the VOC content of the coating is less than 150 g/L.
2. The aqueous PU elastomeric coating according to claim 1, wherein the PU elastomeric coating is sprayed on a cosmetic ABS substrate and dried to form a coating film having excellent physicochemical properties.
3. A method for preparing the aqueous PU elastomeric coating according to claim 1, comprising the steps of:
component A
The first step is as follows: adding water dispersible polycarbonate diol into a clean container, slowly adding pure water, stirring at a stirring speed of 800 rpm for 10-15 minutes to prepare a water dispersible polycarbonate diol semi-finished product, filtering for later use, standing at room temperature for at least 30 minutes before filtering, and filtering with a 300-mesh filter screen;
the second step is that: adding water-based polyester resin into a clean container, sequentially adding a dispersing agent, an anti-settling agent and an organic cosolvent under a stirring state, and stirring;
the third step: under the stirring state, slowly adding flatting powder and polyurethane particles in sequence, stirring for 90-120 minutes at the rotation speed of 1000 revolutions per minute, and then stirring for 10-15 minutes at the rotation speed of 300 revolutions per minute;
the fourth step: slowly adding the water dispersible polycarbonate diol semi-finished product prepared in the first step under stirring, and stirring;
the fifth step: slowly adding the flatting agent and stirring;
and a sixth step: adding an ammonia neutralizing agent, adjusting the pH value to 7.5-8, stirring, packaging after filtering, standing at room temperature for at least 30 minutes before filtering, and filtering with a 300-mesh filter screen;
b component
The seventh step: adding water dispersible polyisocyanate into a clean container, slowly adding pure water, stirring at the stirring speed of 800 rpm for 10-15 minutes, packaging after filtering, standing at room temperature for at least 30 minutes before filtering, and filtering with a 300-mesh filter screen;
eighth step: the elastic coating is mixed according to the ratio of 5: 1: 0.5-1 of the component A, the component B and pure water;
wherein the ambient temperature of the first step to the eighth step is 15-35 ℃.
4. The preparation method of the water-based PU elastic coating material according to claim 3, wherein the stirring speed of the second step, the fourth step, the fifth step and the sixth step is 500 r/min, and the stirring time is 5-10 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710893592.8A CN107502174B (en) | 2017-09-22 | 2017-09-22 | Water-based PU elastic coating and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710893592.8A CN107502174B (en) | 2017-09-22 | 2017-09-22 | Water-based PU elastic coating and preparation method thereof |
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| CN107502174A CN107502174A (en) | 2017-12-22 |
| CN107502174B true CN107502174B (en) | 2020-06-30 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113185908A (en) * | 2021-06-18 | 2021-07-30 | 河北三棵树涂料有限公司 | High-performance reflective heat-insulation water-based exterior wall elastic coating and preparation method thereof |
| CN114350237B (en) * | 2022-01-11 | 2022-12-23 | 广州亦盛环保科技有限公司 | Water-based steel wool-resistant wear-resistant coating and preparation method and construction method thereof |
| CN115651507A (en) * | 2022-11-18 | 2023-01-31 | 杭州立威化工涂料股份有限公司 | High-oil-stain-resistance elastic coating for notebook computer and use method thereof |
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| CN1891774A (en) * | 2005-06-10 | 2007-01-10 | 拜尔材料科学股份公司 | Coating composition for scratch-resistant topcoats, containing oligocarbonates |
| CN101054431A (en) * | 2006-04-11 | 2007-10-17 | 拜尔材料科学股份公司 | Aqueous polyurethane dispersions with improved storage stability |
| CN102002166A (en) * | 2010-10-11 | 2011-04-06 | 中国海洋石油总公司 | Hydroxylated polyurethane water dispersoid for waterborne soft-feel coating and preparation method thereof |
| CN102850502A (en) * | 2007-11-16 | 2013-01-02 | 旭化成化学株式会社 | Polycarbonate diol with ease of reaction stabilization |
| CN104341843A (en) * | 2013-06-11 | 2015-02-11 | 现代摩比斯株式会社 | Composition for painting and varnishing parts of vehicle and varnishing parts of vehicle using the same |
| DE102014226785A1 (en) * | 2013-12-27 | 2015-07-02 | Asahi Kasei Chemicals Corporation | Polycarbonate-containing carbonate compounds |
-
2017
- 2017-09-22 CN CN201710893592.8A patent/CN107502174B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1891774A (en) * | 2005-06-10 | 2007-01-10 | 拜尔材料科学股份公司 | Coating composition for scratch-resistant topcoats, containing oligocarbonates |
| CN101054431A (en) * | 2006-04-11 | 2007-10-17 | 拜尔材料科学股份公司 | Aqueous polyurethane dispersions with improved storage stability |
| CN102850502A (en) * | 2007-11-16 | 2013-01-02 | 旭化成化学株式会社 | Polycarbonate diol with ease of reaction stabilization |
| CN102002166A (en) * | 2010-10-11 | 2011-04-06 | 中国海洋石油总公司 | Hydroxylated polyurethane water dispersoid for waterborne soft-feel coating and preparation method thereof |
| CN104341843A (en) * | 2013-06-11 | 2015-02-11 | 现代摩比斯株式会社 | Composition for painting and varnishing parts of vehicle and varnishing parts of vehicle using the same |
| DE102014226785A1 (en) * | 2013-12-27 | 2015-07-02 | Asahi Kasei Chemicals Corporation | Polycarbonate-containing carbonate compounds |
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