CN114213950A - Scratch-resistant vehicle coat top coating and application thereof - Google Patents
Scratch-resistant vehicle coat top coating and application thereof Download PDFInfo
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- CN114213950A CN114213950A CN202111583590.1A CN202111583590A CN114213950A CN 114213950 A CN114213950 A CN 114213950A CN 202111583590 A CN202111583590 A CN 202111583590A CN 114213950 A CN114213950 A CN 114213950A
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- 238000000576 coating method Methods 0.000 title claims abstract description 73
- 239000011248 coating agent Substances 0.000 title claims abstract description 70
- 230000003678 scratch resistant effect Effects 0.000 title claims abstract description 32
- 150000002009 diols Chemical class 0.000 claims abstract description 70
- 239000003054 catalyst Substances 0.000 claims abstract description 54
- 239000012948 isocyanate Substances 0.000 claims abstract description 53
- 150000002513 isocyanates Chemical class 0.000 claims abstract description 53
- 239000004970 Chain extender Substances 0.000 claims abstract description 44
- 229920001610 polycaprolactone Polymers 0.000 claims abstract description 40
- 239000004632 polycaprolactone Substances 0.000 claims abstract description 39
- 229920000909 polytetrahydrofuran Polymers 0.000 claims abstract description 38
- 239000002904 solvent Substances 0.000 claims abstract description 32
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 102
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 claims description 69
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 claims description 34
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 claims description 34
- 239000000463 material Substances 0.000 claims description 32
- 239000003963 antioxidant agent Substances 0.000 claims description 29
- 230000003078 antioxidant effect Effects 0.000 claims description 29
- 239000012752 auxiliary agent Substances 0.000 claims description 28
- 239000002518 antifoaming agent Substances 0.000 claims description 25
- 239000000203 mixture Substances 0.000 claims description 15
- 238000002360 preparation method Methods 0.000 claims description 13
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 claims description 12
- 239000012975 dibutyltin dilaurate Substances 0.000 claims description 12
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 claims description 10
- YXRKNIZYMIXSAD-UHFFFAOYSA-N 1,6-diisocyanatohexane Chemical compound O=C=NCCCCCCN=C=O.O=C=NCCCCCCN=C=O.O=C=NCCCCCCN=C=O YXRKNIZYMIXSAD-UHFFFAOYSA-N 0.000 claims description 6
- PUPZLCDOIYMWBV-UHFFFAOYSA-N (+/-)-1,3-Butanediol Chemical compound CC(O)CCO PUPZLCDOIYMWBV-UHFFFAOYSA-N 0.000 claims description 4
- 229910052797 bismuth Inorganic materials 0.000 claims description 4
- NSPSPMKCKIPQBH-UHFFFAOYSA-K bismuth;7,7-dimethyloctanoate Chemical compound [Bi+3].CC(C)(C)CCCCCC([O-])=O.CC(C)(C)CCCCCC([O-])=O.CC(C)(C)CCCCCC([O-])=O NSPSPMKCKIPQBH-UHFFFAOYSA-K 0.000 claims description 4
- 239000013530 defoamer Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 239000013638 trimer Substances 0.000 claims description 4
- 239000005058 Isophorone diisocyanate Substances 0.000 claims description 2
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims description 2
- 235000019437 butane-1,3-diol Nutrition 0.000 claims description 2
- 239000002270 dispersing agent Substances 0.000 claims description 2
- XXMIOPMDWAUFGU-UHFFFAOYSA-N hexane-1,6-diol Chemical compound OCCCCCCO XXMIOPMDWAUFGU-UHFFFAOYSA-N 0.000 claims description 2
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 claims description 2
- 239000012974 tin catalyst Substances 0.000 claims description 2
- 238000007790 scraping Methods 0.000 abstract description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 239000006120 scratch resistant coating Substances 0.000 description 28
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 26
- 230000000052 comparative effect Effects 0.000 description 25
- 239000004721 Polyphenylene oxide Substances 0.000 description 20
- 229920000570 polyether Polymers 0.000 description 20
- 239000004433 Thermoplastic polyurethane Substances 0.000 description 17
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 17
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 16
- QUAMTGJKVDWJEQ-UHFFFAOYSA-N octabenzone Chemical group OC1=CC(OCCCCCCCC)=CC=C1C(=O)C1=CC=CC=C1 QUAMTGJKVDWJEQ-UHFFFAOYSA-N 0.000 description 16
- 229920005862 polyol Polymers 0.000 description 16
- 150000003077 polyols Chemical class 0.000 description 16
- 239000002994 raw material Substances 0.000 description 14
- 229910052757 nitrogen Inorganic materials 0.000 description 13
- 239000011527 polyurethane coating Substances 0.000 description 13
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 12
- 238000006243 chemical reaction Methods 0.000 description 11
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 10
- 239000003973 paint Substances 0.000 description 10
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical group CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 description 8
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical group OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 8
- 235000010354 butylated hydroxytoluene Nutrition 0.000 description 8
- 239000006185 dispersion Substances 0.000 description 6
- 239000008096 xylene Substances 0.000 description 6
- 238000011900 installation process Methods 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 229920002635 polyurethane Polymers 0.000 description 3
- 239000004814 polyurethane Substances 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical group CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 241000201976 Polycarpon Species 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- C08G18/30—Low-molecular-weight compounds
- C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
- C08G18/3203—Polyhydroxy compounds
- C08G18/3206—Polyhydroxy compounds aliphatic
-
- 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
- C08G18/4266—Polycondensates having carboxylic or carbonic ester groups in the main chain prepared from hydroxycarboxylic acids and/or lactones
- C08G18/4269—Lactones
- C08G18/4277—Caprolactone and/or substituted caprolactone
-
- 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
- C08G18/48—Polyethers
- C08G18/4854—Polyethers containing oxyalkylene groups having four carbon atoms in the alkylene group
-
- 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
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6603—Compounds of groups C08G18/42, C08G18/48, or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38
- C08G18/6607—Compounds of groups C08G18/42, C08G18/48, or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3203
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Paints Or Removers (AREA)
Abstract
The invention relates to the technical field of coatings, in particular to a scratch-resistant vehicle coat top coating and application thereof. The scratch-resistant car coat top coating comprises the following components in parts by weight: 130-260 parts of isocyanate; 50-150 parts of polytetrahydrofuran dihydric alcohol; 50-150 parts of polycaprolactone diol; 10-20 parts of a catalyst; 10-40 parts of a chain extender; 800 portions and 1250 portions of solvent. Also provides application of the scratch-resistant car cover top coating in preparing a car cover top coating. The coating is prepared from isocyanate, polytetrahydrofuran diol, polycaprolactone diol, a catalyst, a chain extender and a solvent in a specific ratio, the scratch resistance of the coating is stronger, and no obvious scratch occurs under the influence of water driving of a scraper and scraping of scraper attachment in the process of installing the vehicle clothes.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to a scratch-resistant vehicle coat top coating and application thereof.
Background
When the automobile is used, the surface of the automobile is scratched by branches, gravels or other objects, so that paint on the surface of the automobile is easily damaged, high paint repair cost is needed for luxury automobiles, and a small expense is also needed for general automobiles. Therefore, the invisible automobile cover can be used for protecting the paint surface of an automobile in the industry at present, is a high-performance novel environment-friendly film, is widely applied to the automobile beauty maintenance industry, and is commonly known as a transparent paint surface protective film. The invisible automobile coat under ideal conditions has super toughness, and after being attached, the automobile paint surface can be isolated from air, so that the paint surface is protected for a long time.
However, since the existing car cover top coating is still under continuous improvement, the scratch resistance of the common car cover top coating under strong action is not good, for example, in the car cover installation process, more scratches are left on the surface of the invisible car cover due to the water-expelling of the scraper and the jointing of the scraper.
Disclosure of Invention
The invention provides a scratch-resistant car cover top coating, aiming at overcoming the problems that the scratch resistance of the common car cover top coating under the strong action is poor, for example, in the process of mounting a car cover, more scratches are left on the surface of a invisible car cover due to the water dispelling of a scraper and the jointing of the scraper. When the car cover is installed, scratches cannot be generated in the scraping process of the scraping plate and the scraping installation process.
In order to solve the technical problems, the invention adopts the technical scheme that: the scratch-resistant car coat top coating comprises the following components in parts by weight:
the coating is prepared from isocyanate, polytetrahydrofuran diol, polycaprolactone diol, a catalyst, a chain extender and a solvent in a specific ratio, and is cured through a high-temperature reaction to form a polyurethane coating with protective performance on polyurethane TPU.
Preferably, the polytetrahydrofuran diol is at least one of polytetrahydrofuran diol 1000 or polytetrahydrofuran diol 2000.
Preferably, the polycaprolactone diol can be one of polycaprolactone diol 1000, polycaprolactone diol 1500 and polycaprolactone diol 3000 in molecular weight, or a mixture of two or more of them.
Preferably, the chain extender is at least one of 1, 4-butanediol, 1, 3-butanediol and 1, 6-hexanediol.
Preferably, the isocyanate may be at least one of IPDI trimer, TDI trimer, HDI trimer.
Preferably, the catalyst is a metal organic catalyst, and the metal organic catalyst may be at least one of an organotin catalyst and an organobismuth catalyst.
More preferably, the organic tin catalyst is dibutyltin dilaurate, and the organic bismuth catalyst is at least one of bismuth neodecanoate and bismuth naphthenate.
Preferably, the solvent is a mixture of butanone, ethyl acetate and butyl acetate.
Further, the scratch-resistant vehicle coat top coating also comprises an auxiliary agent, wherein the auxiliary agent comprises at least one of an antioxidant, an ultraviolet resistant auxiliary agent, a dispersing agent and a defoaming agent; 5-10 parts of antioxidant, 5-10 parts of ultraviolet-resistant auxiliary agent and 2-10 parts of defoaming agent.
Also provides application of the scratch-resistant car cover top coating in preparing a car cover top coating.
As a preferred possible embodiment, the process for preparing a scratch-resistant invisible car cover top coat with the coating according to the invention comprises the following steps:
(1) under the protection of nitrogen, 5-35% of isocyanate, PTMEG, PCL, a catalyst, a chain extender, an antioxidant, an anti-ultraviolet auxiliary agent, a defoaming agent and a solvent are mixed and then dispersed and reacted for 3 hours at the rotating speed of 800rpm at the temperature of 70 ℃;
(2) reducing the temperature to 30 ℃ to be used as a material A of the polyurethane coating, and using the remaining isocyanate as a material B;
(3) before use, mixing the material A and the material B, and carrying out dispersion reaction for 30 minutes at the rotating speed of 800rpm to obtain the scratch-resistant coating;
(4) coating the scratch-resistant coating on a TPU (thermoplastic polyurethane) base film through a coating machine, baking for 3 minutes at 100 ℃, and forming a scratch-resistant invisible car cover top coating after curing and film forming.
Compared with the prior art, the beneficial effects are:
the polyurethane coating is prepared from isocyanate, polytetrahydrofuran diol, polycaprolactone diol, a catalyst, a chain extender and a solvent in a specific ratio, and is cured through a high-temperature reaction, so that a polyurethane coating with a protective property is formed on a polyurethane TPU, the coating is higher in scratch resistance, and no obvious scratch can occur under the influence of water removal of a scraper and scraping of scraper attachment in the installation process of the car clothes; the coating is scratch-resistant, and has the performances of rainstain resistance, stain resistance, low temperature resistance, excellent dynamic performance and the like. In addition, the raw materials used by the coating designed by the invention are easy to obtain, the synthesis operation is simple, the cost is lower, and the coating is suitable for industrial production and application.
Drawings
The invention has no attached drawing.
Detailed Description
The present invention will be further described with reference to specific embodiments, but the present invention is not limited to the examples in any way. The starting reagents employed in the examples of the present invention are, unless otherwise specified, those that are conventionally purchased.
HDI trimer, kesichuang;
PTMEG-1000, basf;
PCL1000, polycarpon, hunan;
BYK-036, Bick.
Example 1
The embodiment provides a scratch-resistant coating which is prepared from the following raw materials in parts by weight: 133 parts of isocyanate, 100 parts of polycaprolactone diol, 100 parts of polytetrahydrofuran diol, 10 parts of catalyst, 10 parts of chain extender, 5 parts of antioxidant, 8 parts of anti-ultraviolet auxiliary agent, 900 parts of solvent and 5 parts of defoaming agent.
Wherein, the isocyanate is HDI tripolymer, and the molecular weight of polytetrahydrofuran dihydric alcohol is PTMEG-1000; the polycaprolactone diol is PCL-1000; the catalyst is dibutyltin dilaurate; the chain extender is triethanolamine; the antioxidant is 2, 6-di-tert-butyl-4-methylphenol; the anti-ultraviolet auxiliary agent is 2-hydroxy-4-n-octoxy benzophenone; the solvent is a mixture of butanone, ethyl acetate and butyl acetate (the weight ratio of butanone to ethyl acetate to butyl acetate is 1:4: 1); the defoaming agent is BYK-036.
The preparation method of the scratch resistant coating comprises the following steps:
(1) under the protection of nitrogen, 33 parts by weight of isocyanate, 100 parts by weight of polytetrahydrofuran diol, 100 parts by weight of polycaprolactone diol, 10 parts by weight of catalyst, 10 parts by weight of chain extender, 5 parts by weight of antioxidant, 8 parts by weight of anti-ultraviolet assistant, 5 parts by weight of defoamer, 150 parts by weight of butanone, 600 parts by weight of ethyl acetate and 150 parts by weight of butyl acetate are mixed and then dispersed and reacted for 3 hours at the rotating speed of 800rpm at the temperature of 70 ℃;
(2) reducing the temperature to 30 ℃ to be used as a material A of the polyurethane coating, and remaining 100 parts by weight of isocyanate to be used as a material B;
(3) before use, materials A and B were mixed and dispersed at 800rpm for 30 minutes.
(4) The scratch-resistant coating is coated on a TPU base film through a coating machine, baked for 3 minutes at 100 ℃, and cured to form a film, so that a scratch-resistant invisible car cover top coating is formed.
Example 2
The embodiment provides a scratch-resistant coating which is prepared from the following raw materials in parts by weight: 176 parts of isocyanate, 100 parts of polycaprolactone diol, 100 parts of polytetrahydrofuran diol, 10 parts of catalyst, 20 parts of chain extender, 5 parts of antioxidant, 8 parts of anti-ultraviolet auxiliary agent, 900 parts of solvent and 5 parts of defoaming agent.
Wherein, the isocyanate is HDI tripolymer; the polytetrahydrofuran diol is PTMEG-1000; the polycaprolactone diol is PCL-1000; the catalyst is dibutyltin dilaurate; the chain extender is triethanolamine; the antioxidant is 2, 6-di-tert-butyl-4-methylphenol; the anti-ultraviolet auxiliary agent is 2-hydroxy-4-n-octoxy benzophenone; the solvent is a mixture of butanone, ethyl acetate and butyl acetate (the weight ratio of butanone to ethyl acetate to butyl acetate is 1:4: 1); the defoaming agent is BYK-036.
The preparation method of the scratch resistant coating comprises the following steps:
(1) under the protection of nitrogen, mixing 56 parts by weight of isocyanate, 100 parts by weight of polytetrahydrofuran diol, 100 parts by weight of polycaprolactone diol, 10 parts by weight of catalyst, 20 parts by weight of chain extender, 5 parts by weight of antioxidant, 8 parts by weight of anti-ultraviolet assistant, 5 parts by weight of defoaming agent, 150 parts by weight of butanone, 600 parts by weight of ethyl acetate and 150 parts by weight of butyl acetate, and then carrying out dispersion reaction at the rotating speed of 800rpm for 3 hours at 70 ℃;
(2) reducing the temperature to 30 ℃ to be used as a material A of the polyurethane coating, and remaining 120 parts by weight of isocyanate to be used as a material B;
(3) before use, materials A and B were mixed and dispersed at 800rpm for 30 minutes.
(4) The scratch-resistant coating is coated on a TPU base film through a coating machine, baked for 3 minutes at 100 ℃, and cured to form a film, so that a scratch-resistant invisible car cover top coating is formed.
Example 3
The embodiment provides a scratch-resistant coating which is prepared from the following raw materials in parts by weight: 219 parts of isocyanate, 100 parts of polycaprolactone diol, 100 parts of polytetrahydrofuran diol, 10 parts of catalyst, 30 parts of chain extender, 9 parts of antioxidant, 6 parts of anti-ultraviolet auxiliary agent, 1200 parts of solvent and 9 parts of defoaming agent.
Wherein, the isocyanate is HDI tripolymer; the polytetrahydrofuran diol is PTMEG-1000; the polycaprolactone diol is PCL-1000; the catalyst is dibutyltin dilaurate; the chain extender is triethanolamine; the antioxidant is 2, 6-di-tert-butyl-4-methylphenol; the anti-ultraviolet auxiliary agent is 2-hydroxy-4-n-octoxy benzophenone; the solvent is a mixture of butanone, ethyl acetate and butyl acetate (the weight ratio of butanone to ethyl acetate to butyl acetate is 1:4: 1); the defoaming agent is BYK-036.
The preparation method of the scratch resistant coating comprises the following steps:
(1) under the protection of nitrogen, 69 parts by weight of isocyanate, 100 parts by weight of polytetrahydrofuran diol, 10 parts by weight of catalyst, 30 parts by weight of chain extender, 9 parts by weight of antioxidant, 6 parts by weight of ultraviolet-resistant auxiliary agent, 9 parts by weight of defoaming agent, 200 parts by weight of butanone, 800 parts by weight of ethyl acetate and 200 parts by weight of butyl acetate are mixed and then are subjected to dispersion reaction at the rotating speed of 800rpm for 3 hours at 70 ℃;
(2) reducing the temperature to 30 ℃ to be used as a material A of the polyurethane coating, and remaining 150 parts by weight of isocyanate to be used as a material B;
(3) before use, materials A and B were mixed and dispersed at 800rpm for 30 minutes.
(4) The scratch-resistant coating is coated on a TPU base film through a coating machine, baked for 3 minutes at 100 ℃, and cured to form a film, so that a scratch-resistant invisible car cover top coating is formed.
Example 4
The embodiment provides a scratch-resistant coating which is prepared from the following raw materials in parts by weight: 262 parts of isocyanate, 100 parts of polycaprolactone diol, 100 parts of polytetrahydrofuran diol, 10 parts of a catalyst, 40 parts of a chain extender, 9 parts of an antioxidant, 6 parts of an ultraviolet-resistant auxiliary agent, 1200 parts of a solvent and 9 parts of a defoaming agent, wherein the isocyanate is an HDI trimer; the polytetrahydrofuran diol is P-1000; the molecular weight of the polycaprolactone diol is 1000, and the polycaprolactone diol is 2012 from Hunan PolyKernel company; the catalyst is dibutyltin dilaurate; the chain extender is triethanolamine; the antioxidant is 2, 6-di-tert-butyl-4-methylphenol; the anti-ultraviolet auxiliary agent is 2-hydroxy-4-n-octoxy benzophenone; the solvent is a mixture of butanone, ethyl acetate and butyl acetate (the weight ratio of butanone to ethyl acetate to butyl acetate is 1:4: 1); the defoaming agent is BYK-036.
The preparation method of the scratch resistant coating comprises the following steps:
(1) under the protection of nitrogen, mixing 72 parts by weight of isocyanate, 100 parts by weight of polytetrahydrofuran diol, 100 parts by weight of polycaprolactone diol, 10 parts by weight of catalyst, 40 parts by weight of chain extender, 9 parts by weight of antioxidant, 6 parts by weight of ultraviolet-resistant auxiliary agent, 9 parts by weight of defoaming agent, 200 parts by weight of butanone, 800 parts by weight of ethyl acetate and 200 parts by weight of butyl acetate, and then carrying out dispersion reaction at the rotating speed of 800rpm for 3 hours at 70 ℃;
(2) reducing the temperature to 30 ℃ to be used as a material A of the polyurethane coating, and leaving 190 parts by weight of isocyanate to be used as a material B;
(3) before use, materials A and B were mixed and dispersed at 800rpm for 30 minutes.
(4) The scratch-resistant coating is coated on a TPU base film through a coating machine, baked for 3 minutes at 100 ℃, and cured to form a film, so that a scratch-resistant invisible car cover top coating is formed.
Example 5
The embodiment provides a scratch-resistant coating which is prepared from the following raw materials in parts by weight: 133 parts of isocyanate, 50 parts of polycaprolactone diol, 150 parts of polytetrahydrofuran diol, 10 parts of catalyst, 10 parts of chain extender, 5 parts of antioxidant, 8 parts of anti-ultraviolet auxiliary agent, 900 parts of solvent and 5 parts of defoaming agent.
Wherein, the isocyanate is HDI tripolymer; the polytetrahydrofuran diol is PTMEG-1000; the polycaprolactone diol is PCL-1000; the catalyst is dibutyltin dilaurate; the chain extender is triethanolamine; the antioxidant is 2, 6-di-tert-butyl-4-methylphenol; the anti-ultraviolet auxiliary agent is 2-hydroxy-4-n-octoxy benzophenone; the solvent is a mixture of butanone, ethyl acetate and butyl acetate (the weight ratio of butanone to ethyl acetate to butyl acetate is 1:4: 1); the defoaming agent is BYK-036.
The preparation method of the scratch resistant coating comprises the following steps:
(1) under the protection of nitrogen, 33 parts by weight of isocyanate, 150 parts by weight of polytetrahydrofuran diol, 50 parts by weight of polycaprolactone diol, 10 parts by weight of catalyst, 10 parts by weight of chain extender, 5 parts by weight of antioxidant, 8 parts by weight of anti-ultraviolet assistant, 5 parts by weight of defoamer, 150 parts by weight of butanone, 600 parts by weight of ethyl acetate and 150 parts by weight of butyl acetate are mixed and then dispersed and reacted for 3 hours at the rotating speed of 800rpm at the temperature of 70 ℃;
(2) reducing the temperature to 30 ℃ to be used as a material A of the polyurethane coating, and remaining 100 parts by weight of isocyanate to be used as a material B;
(3) before use, materials A and B were mixed and dispersed at 800rpm for 30 minutes.
(4) The scratch-resistant coating is coated on a TPU base film through a coating machine, baked for 3 minutes at 100 ℃, and cured to form a film, so that a scratch-resistant invisible car cover top coating is formed.
Example 6
The embodiment provides a scratch-resistant coating which is prepared from the following raw materials in parts by weight: 133 parts of isocyanate, 150 parts of polycaprolactone diol, 50 parts of polytetrahydrofuran diol, 10 parts of catalyst, 10 parts of chain extender, 5 parts of antioxidant, 8 parts of anti-ultraviolet auxiliary agent, 900 parts of solvent and 5 parts of defoaming agent.
Wherein, the isocyanate is HDI tripolymer; the polytetrahydrofuran diol is PTMEG-1000; the polycaprolactone diol is PCL-1000; the catalyst is dibutyltin dilaurate; the chain extender is triethanolamine; the antioxidant is 2, 6-di-tert-butyl-4-methylphenol; the anti-ultraviolet auxiliary agent is 2-hydroxy-4-n-octoxy benzophenone; the solvent is a mixture of butanone, ethyl acetate and butyl acetate (the weight ratio of butanone to ethyl acetate to butyl acetate is 1:4: 1); the defoaming agent is BYK-036.
The preparation method of the scratch resistant coating comprises the following steps:
(1) under the protection of nitrogen, 33 parts by weight of isocyanate, 50 parts by weight of polytetrahydrofuran diol, 150 parts by weight of polycaprolactone diol, 10 parts by weight of catalyst, 10 parts by weight of chain extender, 5 parts by weight of antioxidant, 8 parts by weight of ultraviolet-resistant auxiliary agent, 5 parts by weight of defoaming agent, 150 parts by weight of butanone, 600 parts by weight of ethyl acetate and 150 parts by weight of butyl acetate are mixed and then dispersed and reacted for 3 hours at the rotating speed of 800rpm at the temperature of 70 ℃;
(2) reducing the temperature to 30 ℃ to be used as a material A of the polyurethane coating, and remaining 100 parts by weight of isocyanate to be used as a material B;
(3) before use, materials A and B were mixed and dispersed at 800rpm for 30 minutes.
(4) The scratch-resistant coating is coated on a TPU base film through a coating machine, baked for 3 minutes at 100 ℃, and cured to form a film, so that a scratch-resistant invisible car cover top coating is formed.
As can be seen from the combination of examples 1-6, the coating compositions prepared in the examples are shown in Table 1:
TABLE 1
Comparative example 1
The comparative example provides a coating, which is prepared from the following raw materials in parts by weight: 117 parts of isocyanate, 100 parts of hydroxyl polyether polyol, 10 parts of catalyst, 5 parts of chain extender and 260 parts of solvent, wherein the isocyanate is TDI; the hydroxyl polyether polyol is trihydroxy polyether polyol with the molecular weight of 450 and is purchased from CASE polyether of the Dow chemical company; the catalyst is dibutyltin dilaurate; the chain extender is BDO (1, 4-butanediol); the solvent is a mixture of xylene and cyclohexanone (weight ratio xylene: cyclohexanone 1: 1).
The preparation method of the comparative example paint comprises the following steps:
(1) under the protection of nitrogen, mixing 117 parts by weight of isocyanate, 100 parts by weight of hydroxyl polyether polyol, 65 parts by weight of xylene and 65 parts by weight of cyclohexanone, and then carrying out dispersion reaction at 75 ℃ at the rotating speed of 800rpm for 3 hours;
(2) then reducing the temperature to 50 ℃, adding 10 parts by weight of catalyst and 5 parts by weight of chain extender, heating to 75 ℃, and reacting at the constant temperature of 800rpm for 3.5 hours;
(3) reducing the temperature to 40 ℃, adding 65 parts by weight of dimethylbenzene and 65 parts by weight of cyclohexanone, and dispersing at the rotating speed of 800rpm for 5min to obtain the coating.
The comparative coating is coated on a TPU base film through a coating machine, baked for 3 minutes at 100 ℃, and cured to form a film, so that the invisible car cover top coating is formed.
Comparative example 2
The comparative example provides a coating, which is prepared from the following raw materials in parts by weight: 117 parts of isocyanate, 67 parts of hydroxyl polyether polyol, 10 parts of catalyst, 5 parts of chain extender and 260 parts of solvent, wherein the isocyanate is TDI; the hydroxyl polyether polyol is trihydroxy polyether polyol, has the molecular weight of 300, and is purchased from CASE polyether of the Dow chemical company; the catalyst is dibutyltin dilaurate; the chain extender is BDO (1, 4-butanediol); the solvent is a mixture of xylene and cyclohexanone (weight ratio xylene: cyclohexanone 1: 1).
The preparation method of the comparative example paint comprises the following steps:
(1) under the protection of nitrogen, mixing 117 parts by weight of isocyanate, 67 parts by weight of hydroxyl polyether polyol, 65 parts by weight of xylene and 65 parts by weight of cyclohexanone, and then carrying out dispersion reaction at 75 ℃ at the rotating speed of 800rpm for 3 hours;
(2) then reducing the temperature to 50 ℃, adding 10 parts by weight of catalyst and 5 parts by weight of chain extender, heating to 75 ℃, and reacting at the constant temperature of 800rpm for 3.5 hours;
(3) reducing the temperature to 40 ℃, adding 65 parts by weight of dimethylbenzene and 65 parts by weight of cyclohexanone, and dispersing at the rotating speed of 800rpm for 5min to obtain the coating.
The comparative coating is coated on a TPU base film through a coating machine, baked for 3 minutes at 100 ℃, and cured to form a film, so that the invisible car cover top coating is formed.
Comparative example 3
The comparative example provides a coating, which is prepared from the following raw materials in parts by weight: 250 parts of isocyanate, 200 parts of hydroxyl polyether polyol, 17 parts of catalyst, 100 parts of chain extender and 600 parts of solvent, wherein the isocyanate is TDI; the hydroxyl polyether polyol is trihydroxy polyether polyol, has the molecular weight of 1000, and is purchased from CASE polyether of the Dow chemical company; the catalyst is bismuth neodecanoate; the chain extender is trimethylolpropane; the solvent is a mixture of butanone, ethyl acetate and butyl acetate (weight ratio of butanone to ethyl acetate to butyl acetate: 1:4: 1).
The preparation method of the comparative example paint comprises the following steps:
(1) under the protection of nitrogen, 250 parts by weight of isocyanate, 17 parts by weight of catalyst, 100 parts by weight of chain extender, 40 parts by weight of butanone, 160 parts by weight of ethyl acetate and 40 parts by weight of butyl acetate are mixed and then dispersed and reacted for 4 hours at the rotating speed of 800rpm at the temperature of 60 ℃;
(2) then reducing the temperature to 45 ℃, adding 200 parts by weight of hydroxyl polyether polyol, heating to 75 ℃, and reacting at the constant temperature of 800rpm for 2 hours;
(3) reducing the temperature to 45 ℃, adding 60 parts by weight of butanone, 240 parts by weight of ethyl acetate and 60 parts by weight of butyl acetate into a reaction kettle, and dispersing for 15min at the rotating speed of 500rpm to obtain the scratch-resistant coating.
The comparative coating is coated on a TPU base film through a coating machine, baked for 3 minutes at 100 ℃, and cured to form a film, so that the invisible car cover top coating is formed.
Comparative example 4
The comparative example provides a coating, which is prepared from the following raw materials in parts by weight: 250 parts of isocyanate, 200 parts of hydroxyl polyether polyol, 13 parts of acrylate, 17 parts of catalyst, 100 parts of chain extender and 600 parts of solvent, wherein the isocyanate is TDI; the hydroxyl polyether polyol is trihydroxy polyether polyol, has the molecular weight of 1000, and is purchased from CASE polyether of the Dow chemical company; the catalyst is bismuth neodecanoate; the chain extender is trimethylolpropane; the solvent is a mixture of butanone, ethyl acetate and butyl acetate (weight ratio of butanone to ethyl acetate to butyl acetate: 1:4: 1).
The preparation method of the comparative example paint comprises the following steps:
(1) under the protection of nitrogen, 250 parts by weight of isocyanate, 13 parts by weight of acrylate, 17 parts by weight of catalyst, 100 parts by weight of chain extender, 40 parts by weight of butanone, 160 parts by weight of ethyl acetate and 40 parts by weight of butyl acetate are mixed and then dispersed and reacted for 4 hours at the rotating speed of 800rpm at the temperature of 60 ℃;
(2) then reducing the temperature to 45 ℃, adding 200 parts by weight of hydroxyl polyether polyol, heating to 75 ℃, and reacting at the constant temperature of 800rpm for 2 hours;
(3) reducing the temperature to 45 ℃, adding 60 parts by weight of butanone, 240 parts by weight of ethyl acetate and 60 parts by weight of butyl acetate into a reaction kettle, and dispersing for 15min at the rotating speed of 500rpm to obtain the scratch-resistant coating.
The comparative coating is coated on a TPU base film through a coating machine, baked for 3 minutes at 100 ℃, and cured to form a film, so that the invisible car cover top coating is formed.
Comparative example 5
The comparative example provides a scratch-resistant coating, which is prepared from the following raw materials in parts by weight: 305 parts of isocyanate, 50 parts of polycaprolactone diol, 150 parts of polytetrahydrofuran diol, 10 parts of a catalyst, 50 parts of a chain extender, 5 parts of an antioxidant, 8 parts of an ultraviolet-resistant auxiliary agent, 1200 parts of a solvent and 5 parts of a defoaming agent, wherein the isocyanate is an HDI trimer; polytetrahydrofuran diol, having a molecular weight of 1000, is commercially available from basf as polytetrahydrofuran diol-1000; the molecular weight of the polycaprolactone diol is 1000, and the polycaprolactone diol is 2012 from Hunan PolyKernel company; the catalyst is dibutyltin dilaurate; the chain extender is triethanolamine; the antioxidant is 2, 6-di-tert-butyl-4-methylphenol; the anti-ultraviolet auxiliary agent is 2-hydroxy-4-n-octoxy benzophenone; the solvent is a mixture of butanone, ethyl acetate and butyl acetate (the weight ratio of butanone to ethyl acetate to butyl acetate is 1:4: 1); the defoaming agent is BYK-036.
The preparation method of the scratch resistant coating comprises the following steps:
(1) under the protection of nitrogen, 205 parts by weight of isocyanate, 150 parts by weight of polytetrahydrofuran diol, 50 parts by weight of polycaprolactone diol, 10 parts by weight of catalyst, 50 parts by weight of chain extender, 5 parts by weight of antioxidant, 8 parts by weight of anti-ultraviolet assistant, 5 parts by weight of defoamer, 200 parts by weight of butanone, 800 parts by weight of ethyl acetate and 200 parts by weight of butyl acetate are mixed and then dispersed and reacted for 3 hours at the rotating speed of 800rpm at the temperature of 70 ℃;
(2) reducing the temperature to 30 ℃ to be used as a material A of the polyurethane coating, and remaining 100 parts by weight of isocyanate to be used as a material B;
(3) before use, materials A and B were mixed and dispersed at 800rpm for 30 minutes.
(4) The scratch-resistant coating is coated on a TPU base film through a coating machine, baked for 3 minutes at 100 ℃, and cured to form a film, so that a scratch-resistant invisible car cover top coating is formed.
Comparative example 6
The comparative example provides a scratch-resistant coating, which is prepared from the following raw materials in parts by weight: 120 parts of isocyanate, 50 parts of polycaprolactone diol, 150 parts of polytetrahydrofuran diol, 10 parts of a catalyst, 7.5 parts of a chain extender, 5 parts of an antioxidant, 8 parts of an ultraviolet-resistant auxiliary agent, 700 parts of a solvent and 5 parts of a defoaming agent, wherein the isocyanate is an HDI trimer; polytetrahydrofuran diol, having a molecular weight of 1000, is commercially available from basf as polytetrahydrofuran diol-1000; the molecular weight of the polycaprolactone diol is 1000, and the polycaprolactone diol is 2012 from Hunan PolyKernel company; the catalyst is dibutyltin dilaurate; the chain extender is triethanolamine; the antioxidant is 2, 6-di-tert-butyl-4-methylphenol; the anti-ultraviolet auxiliary agent is 2-hydroxy-4-n-octoxy benzophenone; the solvent is a mixture of butanone, ethyl acetate and butyl acetate (the weight ratio of butanone to ethyl acetate to butyl acetate is 1:4: 1); the defoaming agent is BYK-036.
The preparation method of the scratch resistant coating comprises the following steps:
(1) under the protection of nitrogen, 20 parts by weight of isocyanate, 150 parts by weight of polytetrahydrofuran diol, 50 parts by weight of polycaprolactone diol, 10 parts by weight of catalyst, 7.5 parts by weight of chain extender, 5 parts by weight of antioxidant, 8 parts by weight of anti-ultraviolet assistant, 5 parts by weight of defoaming agent, 125 parts by weight of butanone, 450 parts by weight of ethyl acetate and 125 parts by weight of butyl acetate are mixed and then dispersed and reacted for 3 hours at the rotating speed of 800rpm at the temperature of 70 ℃;
(2) reducing the temperature to 30 ℃ to be used as a material A of the polyurethane coating, and remaining 100 parts by weight of isocyanate to be used as a material B;
(3) before use, materials A and B were mixed and dispersed at 800rpm for 30 minutes.
(4) The scratch-resistant coating is coated on a TPU base film through a coating machine, baked for 3 minutes at 100 ℃, and cured to form a film, so that a scratch-resistant invisible car cover top coating is formed.
As can be seen from the combination of comparative examples 1-6, the component contents of the coating in each comparative example are shown in Table 2:
effect example 1
12 coatings prepared in examples 1 to 6 and comparative examples 1 to 6 were scratched back and forth 30 times with almost the same force using a copper brush on the prepared invisible car clothes, and the scratch condition of the coating surface was observed by an AFM atomic force microscope. The test results of examples 1 to 6 and comparative examples 1 to 6 are shown in table 3 below.
TABLE 3
Through the comparison of the experiments, in the comparative experiment, in the installation process of the invisible car cover, due to the reason of the copper brush and the fact that the coating does not have the scratch resistance, the problem that scratches exist on the appearance of the invisible car cover, and scratches influencing the surface appear in the processing process; and can affect the gloss of the surface; the coating is prepared by adopting the formula of the coating designed by the invention and adopting isocyanate, polytetrahydrofuran dihydric alcohol, polycaprolactone dihydric alcohol, a catalyst, a chain extender and a solvent in a specific ratio, and a polyurethane coating with protective performance is formed on polyurethane TPU through high-temperature reaction and solidification, so that the coating has stronger scratch resistance, and no obvious scratch can be generated under the influence of water removal of a scraper and scraping of scraper attachment in the installation process of the car clothes; the coating is scratch-resistant, and has the performances of rainstain resistance, stain resistance, low temperature resistance, excellent dynamic performance and the like. In addition, the raw materials used by the coating designed by the invention are easy to obtain, the synthesis operation is simple, the cost is lower, and the coating is suitable for industrial production and application.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. The scratch-resistant vehicle coat top coating is characterized by comprising the following components in parts by weight:
2. the scratch resistant vehicle coat topcoat of claim 1, wherein the polytetrahydrofuran diol comprises one or both of polytetrahydrofuran diol 1000 or polytetrahydrofuran diol 2000.
3. The scratch resistant automotive topcoat material of claim 1, wherein the polycaprolactone diol comprises one or more of polycaprolactone diol 1000, polycaprolactone diol 1500, and polycaprolactone diol 3000 in molecular weight.
4. The scratch resistant automotive topcoat material of claim 1, wherein the chain extender comprises one or more of 1, 4-butanediol, 1, 3-butanediol, 1, 6-hexanediol.
5. The scratch resistant automotive topcoat of claim 1, wherein the isocyanate comprises one or more of IPDI trimer, TDI trimer, HDI trimer.
6. The scratch resistant automotive topcoat of any one of claims 1 to 5, wherein the catalyst is a metal organic catalyst; the metal organic catalyst comprises one or more of an organic tin catalyst and an organic bismuth catalyst.
7. The scratch resistant automotive topcoat of claim 6, wherein the organotin catalyst comprises dibutyltin dilaurate and the organobismuth catalyst comprises one or more of bismuth neodecanoate and bismuth naphthenate.
8. The scratch resistant automotive topcoat material of any one of claims 1 to 5, wherein the solvent is a mixture of methyl ethyl ketone, ethyl acetate and butyl acetate.
9. The scratch resistant automotive topcoat material of any one of claims 1 to 5, further comprising an auxiliary agent, wherein the auxiliary agent comprises at least one of an antioxidant, a UV resistant auxiliary agent, a dispersant, a defoamer; 5-10 parts of antioxidant, 5-10 parts of ultraviolet-resistant auxiliary agent and 2-10 parts of defoaming agent.
10. Use of the scratch resistant automotive topcoat of any one of claims 1 to 9 in the preparation of an automotive topcoat.
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| CN113072873A (en) * | 2021-04-30 | 2021-07-06 | 中科院长春应化所黄埔先进材料研究院 | Coating and preparation method and application thereof |
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| CN113278353A (en) * | 2021-04-30 | 2021-08-20 | 中科院长春应化所黄埔先进材料研究院 | Coating and preparation method and application thereof |
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