CN110157229B - Environment-friendly wear-resistant coating for automobiles and preparation method thereof - Google Patents
Environment-friendly wear-resistant coating for automobiles and preparation method thereof Download PDFInfo
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- CN110157229B CN110157229B CN201910464917.XA CN201910464917A CN110157229B CN 110157229 B CN110157229 B CN 110157229B CN 201910464917 A CN201910464917 A CN 201910464917A CN 110157229 B CN110157229 B CN 110157229B
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- 238000000576 coating method Methods 0.000 title claims abstract description 82
- 239000011248 coating agent Substances 0.000 title claims abstract description 79
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 239000000945 filler Substances 0.000 claims abstract description 75
- 229920001225 polyester resin Polymers 0.000 claims abstract description 65
- 239000004645 polyester resin Substances 0.000 claims abstract description 65
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 49
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims abstract description 45
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims abstract description 30
- 229920005989 resin Polymers 0.000 claims abstract description 30
- 239000011347 resin Substances 0.000 claims abstract description 30
- 230000001050 lubricating effect Effects 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 230000002745 absorbent Effects 0.000 claims abstract description 15
- 239000002250 absorbent Substances 0.000 claims abstract description 15
- 239000003973 paint Substances 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 12
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 8
- 238000003756 stirring Methods 0.000 claims description 36
- 238000006243 chemical reaction Methods 0.000 claims description 26
- 238000010438 heat treatment Methods 0.000 claims description 26
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 21
- 229910052710 silicon Inorganic materials 0.000 claims description 21
- 239000010703 silicon Substances 0.000 claims description 21
- YIMQCDZDWXUDCA-UHFFFAOYSA-N [4-(hydroxymethyl)cyclohexyl]methanol Chemical group OCC1CCC(CO)CC1 YIMQCDZDWXUDCA-UHFFFAOYSA-N 0.000 claims description 10
- 239000002253 acid Substances 0.000 claims description 10
- MUTGBJKUEZFXGO-OLQVQODUSA-N (3as,7ar)-3a,4,5,6,7,7a-hexahydro-2-benzofuran-1,3-dione Chemical compound C1CCC[C@@H]2C(=O)OC(=O)[C@@H]21 MUTGBJKUEZFXGO-OLQVQODUSA-N 0.000 claims description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 9
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 9
- LIKFHECYJZWXFJ-UHFFFAOYSA-N dimethyldichlorosilane Chemical compound C[Si](C)(Cl)Cl LIKFHECYJZWXFJ-UHFFFAOYSA-N 0.000 claims description 7
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 6
- OOIOHEBTXPTBBE-UHFFFAOYSA-N [Na].[Fe] Chemical compound [Na].[Fe] OOIOHEBTXPTBBE-UHFFFAOYSA-N 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 claims description 6
- 230000007935 neutral effect Effects 0.000 claims description 6
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 6
- 238000001291 vacuum drying Methods 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- 238000007334 copolymerization reaction Methods 0.000 claims description 5
- 239000013530 defoamer Substances 0.000 claims description 5
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 claims description 5
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical group CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 claims description 4
- BVFSYZFXJYAPQJ-UHFFFAOYSA-N butyl(oxo)tin Chemical compound CCCC[Sn]=O BVFSYZFXJYAPQJ-UHFFFAOYSA-N 0.000 claims description 4
- OZCWUNHGNVXCCO-UHFFFAOYSA-N oxiran-2-ylmethyl hydrogen carbonate Chemical group OC(=O)OCC1CO1 OZCWUNHGNVXCCO-UHFFFAOYSA-N 0.000 claims description 4
- -1 trihydroxyethyl urea isocyanate Chemical group 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 239000012153 distilled water Substances 0.000 claims description 3
- XXMIOPMDWAUFGU-UHFFFAOYSA-N hexane-1,6-diol Chemical compound OCCCCCCO XXMIOPMDWAUFGU-UHFFFAOYSA-N 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 238000010992 reflux Methods 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 abstract description 14
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000005507 spraying Methods 0.000 abstract description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 8
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical group S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 8
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 8
- 239000002131 composite material Substances 0.000 description 7
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910008051 Si-OH Inorganic materials 0.000 description 4
- 229910006358 Si—OH Inorganic materials 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 4
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 4
- 125000002723 alicyclic group Chemical group 0.000 description 4
- 125000003118 aryl group Chemical group 0.000 description 4
- 238000004132 cross linking Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 125000004434 sulfur atom Chemical group 0.000 description 4
- 238000009835 boiling Methods 0.000 description 3
- 238000002834 transmittance Methods 0.000 description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical group [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 2
- 229910002808 Si–O–Si Inorganic materials 0.000 description 2
- 235000011037 adipic acid Nutrition 0.000 description 2
- 239000001361 adipic acid Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 125000001931 aliphatic group Chemical group 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 150000008064 anhydrides Chemical class 0.000 description 2
- 239000012752 auxiliary agent Substances 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 235000019441 ethanol Nutrition 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- ULNRRNBMNIIOJK-UHFFFAOYSA-N isocyanatourea Chemical compound NC(=O)NN=C=O ULNRRNBMNIIOJK-UHFFFAOYSA-N 0.000 description 2
- 230000031700 light absorption Effects 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 238000005191 phase separation Methods 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000007142 ring opening reaction Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 230000003335 steric effect Effects 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 244000137852 Petrea volubilis Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 description 1
- 229910000360 iron(III) sulfate Inorganic materials 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 239000005028 tinplate Substances 0.000 description 1
- YUYCVXFAYWRXLS-UHFFFAOYSA-N trimethoxysilane Chemical compound CO[SiH](OC)OC YUYCVXFAYWRXLS-UHFFFAOYSA-N 0.000 description 1
- 150000003672 ureas Chemical class 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Classifications
-
- 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
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/42—Block-or graft-polymers containing polysiloxane sequences
- C08G77/445—Block-or graft-polymers containing polysiloxane sequences containing polyester sequences
-
- 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
- C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
- C09D4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09D159/00 - C09D187/00
-
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
-
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Inorganic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses an environment-friendly wear-resistant coating for automobiles, which is prepared from the following raw materials in parts by weight: 50-60 parts of modified polyester resin, 2.5-3 parts of wear-resistant filler, 1-1.5 parts of lubricating filler, 1-1.6 parts of curing agent, 0.2-0.3 part of defoaming agent, 0.3-0.4 part of anti-settling agent, 0.2-0.3 part of flatting agent, 0.1-0.2 part of ultraviolet absorbent, 5-8 parts of styrene and 40-50 parts of N, N-dimethylformamide; the invention also discloses a preparation method of the coating. The coating disclosed by the invention adopts the modified polyester resin as a coating film forming matrix, and the modified polyester resin has better water resistance, wear resistance, impact resistance and other properties; the wear-resistant filler is added, so that the wear-resistant filler can be well dispersed in a resin matrix to play a role in bearing and dispersing load, and can generate a tighter inorganic/organic coating with resin to enhance the wear resistance of the coating; the obtained paint has excellent wear resistance and water resistance, and can meet the requirements of spraying process of automobiles on production lines.
Description
Technical Field
The invention belongs to the technical field of automobile coating, and particularly relates to an environment-friendly wear-resistant coating for an automobile and a preparation method thereof.
Background
During the running of an automobile, parts such as a wheel cover, a vehicle bottom plate, a lower longitudinal beam, a mudguard and a door pedal of the automobile are easily impacted by sand and stone, and the parts are easily damaged and corroded, so that driving hidden troubles are brought. It is therefore very important and necessary to protect these parts of the automobile, where the commonly used protection method is to apply an abrasion resistant coating.
The existing coating has the following defects: the paint does not resist high temperature, and can crack, bubble and fall off after being exposed to the sun for a long time; the waterproof performance is poor, and the interior of the waterproof structure is easy to be corroded due to the easy penetration of rainwater; the paint is not resistant to collision, has poor wear resistance and poor adhesive force, and can be easily corroded due to paint falling after being cut and rubbed by careless scraping, so that the appearance and the service life of the automobile body are influenced.
Disclosure of Invention
The invention aims to provide an environment-friendly wear-resistant coating for automobiles and a preparation method thereof, wherein modified polyester resin is used as a coating film forming matrix, and the modified polyester resin has better performances of water resistance, wear resistance, impact resistance and the like; the wear-resistant filler is added into the coating, the wear-resistant filler can be well dispersed in a resin matrix to play a role in bearing and dispersing load, and C ═ C double bonds introduced into the surface of the modified mixed filler can perform a crosslinking reaction with unsaturated bonds in the resin to generate a tighter inorganic/organic coating, so that the wear resistance of the coating is greatly enhanced; in addition, volatile organic gas is not generated in the preparation process of the coating, so that the environment-friendly concept is met; the obtained paint has excellent wear resistance and water resistance, and can meet the requirements of spraying process of automobiles on production lines.
The purpose of the invention can be realized by the following technical scheme:
the environment-friendly wear-resistant coating for the automobile is prepared from the following raw materials in parts by weight: 50-60 parts of modified polyester resin, 2.5-3 parts of wear-resistant filler, 1-1.5 parts of lubricating filler, 1-1.6 parts of curing agent, 0.2-0.3 part of defoaming agent, 0.3-0.4 part of anti-settling agent, 0.2-0.3 part of flatting agent, 0.1-0.2 part of ultraviolet absorbent, 5-8 parts of styrene and 40-50 parts of N, N-dimethylformamide;
the preparation method of the environment-friendly wear-resistant coating for the automobile comprises the following steps:
step S1, adding the modified polyester resin into N, N-dimethylformamide, and heating to dissolve the modified polyester resin;
step S2, adding styrene, wear-resistant filler and lubricating filler, stirring at normal temperature of 200r/min for 30-40min, adding defoamer, anti-settling agent, leveling agent and ultraviolet absorbent, and continuing stirring at 200r/min for 20-30 min;
and step S3, finally adding a curing agent, and stirring for 10min to obtain the environment-friendly wear-resistant paint for the automobile.
Further, the wear-resistant filler is prepared by the following method:
(1) mixing sodium iron titanate whiskers and aluminum oxide according to a mass ratio of 10:3-4, and drying in a drying oven at 110 ℃ for 60min to obtain a mixed filler;
(2) weighing 3.2g of the mixed filler, putting the mixed filler into a three-neck flask filled with 50mL of n-hexane, performing ultrasonic dispersion for 90min, then dropwise adding 2.5mL of dimethyldichlorosilane into the flask, dropwise adding 10mL of distilled water, reacting for 8h at the constant temperature of 65 ℃, repeatedly filtering and washing with absolute ethyl alcohol immediately after the reaction is finished till the mixture is neutral, and then performing vacuum drying for 3-4h at 40 ℃;
(3) adding 80mL of toluene and 5mL of gamma-glycidoxypropyltrimethoxysilane into a 150mL round-bottom flask, stirring at constant temperature of 30 ℃ for 30min, adding the product obtained in the previous step, performing ultrasonic dispersion for 80min, heating to 70 ℃, stirring at constant temperature for reaction for 3-4h, filtering and washing repeatedly by using absolute ethyl alcohol immediately after the reaction is finished until the reaction is neutral, and performing vacuum drying at 45 ℃ to obtain the wear-resistant filler.
Further, the modified polyester resin is prepared by the following method:
(1) adding hexahydrophthalic anhydride and 1, 6-hexanediol into a three-mouth reaction bottle with a nitrogen protection and condenser, heating to melt, starting stirring, heating to 140 ℃, and keeping the temperature for 1 h;
(2) cooling the system to 80 ℃, adding dimethylbenzene, monobutyl tin oxide, tertiary carbonic acid glycidyl ester, 1, 4-cyclohexanedimethanol, trimethylolpropane and trihydroxyethyl urea isocyanate, heating to 160 ℃ under stirring, refluxing and dehydrating for 4 hours, heating to 220 ℃ according to the heating rate of 10 ℃/h, and stopping reaction when the measured acid value is less than or equal to 3.5mgKOH/g to obtain polyester resin;
(3) and mixing the polyester resin and the organic silicon resin according to the mass ratio of 2:1, and carrying out copolymerization reaction to obtain the modified polyester resin.
A preparation method of an environment-friendly wear-resistant coating for automobiles comprises the following steps:
step S1, adding the modified polyester resin into N, N-dimethylformamide, and heating to dissolve the modified polyester resin;
step S2, adding styrene, wear-resistant filler and lubricating filler, stirring at normal temperature of 200r/min for 30-40min, adding defoamer, anti-settling agent, leveling agent and ultraviolet absorbent, and continuing stirring at 200r/min for 20-30 min;
and step S3, finally adding a curing agent, and stirring for 10min to obtain the environment-friendly wear-resistant paint for the automobile.
The invention has the beneficial effects that:
the invention adopts modified polyester resin as film forming material of paint, and introduces linear structure dihydric alcohol in the middle of 2 rigid six-membered rings of hexahydrophthalic anhydride by using the reaction of hydroxyl ring-opening anhydride in the initial reaction stage of synthesizing polyester resin, so that the structure not only can greatly improve the flexibility of polyester resin, but also avoids the steric effect of 2 six-membered rings due to carbon chain windingThe viscosity of the resin is increased, 1, 4-cyclohexanedimethanol is introduced at the later stage of polyester synthesis, and like hexahydrophthalic anhydride, the 1, 4-cyclohexanedimethanol has a saturated six-membered ring structure, the weather resistance is good, the hardness and the flexibility are both considered, and the polyester resin prepared by using the 1, 4-cyclohexanedimethanol has more excellent hydrolysis resistance; in addition, the six-membered ring in the alicyclic dibasic acid has a structure similar to that of an aromatic benzene ring, the Tg of the alicyclic dibasic acid is slightly lower than that of the aromatic dibasic acid, certain rigidity and oil resistance can be provided for resin, and meanwhile, the aliphatic long carbon chain can rotate freely, so that the flexibility of a high polymer can be improved, and the requirement on the impact resistance of a coating film can be met; furthermore, hexahydrophthalic anhydride and adipic acid do not have benzene ring structures, so that the phenomena of severe light loss and aging of a coating film due to ultraviolet light absorption are avoided, and the weather resistance of the coating film is enhanced; the trishydroxyethyl urea isocyanate contained in the polyester resin, the-CH thereof2-CH2-OH reacts with-Si-O-on the organic silicon resin to obtain organic silicon resin modified polyester resin; the heat-resistant temperature of the polyester resin is 155 ℃, the heat-resistant temperature of the organic silicon resin is 300 ℃, and the heat-resistant temperature of the organic silicon resin copolymerization modified polyester resin is 200-250 ℃, so that the heat-resistant performance of the coating film can be improved through modification of the organic silicon resin, and the organic silicon resin contains a large amount of Si-O-Si covalent bond networks with good wear resistance, has good compactness and wear resistance, and can improve the wear resistance of the polyester resin; the polyester resin is modified by the organic silicon resin, so that the water resistance is improved, the surface free energy of the modified polyester resin is reduced along with the increase of the content of the organic silicon, the surface free energy of the polyester resin can be reduced to a great extent by using a small amount of the organic silicon, and the reduction of the surface free energy is favorable for improving the water resistance of a coating film;
the invention adds wear-resistant filler into the coating, the surfaces of the sodium iron titanate crystal whisker and the aluminum oxide both contain hydroxyl, Si-Cl of the dimethyldichlorosilane reacts with the hydroxyl to generate-O-Si-OH which is grafted on the surface of the filler, and the hydroxyl on the-O-Si-OH is further grafted with Si-O-CH of the gamma-glycidyl ether oxypropyl trimethoxy silane3Reacting to graft the molecular chain of gamma-glycidoxypropyltrimethoxysilane to the end of dimethyldichlorosilane to form a mixed fillerAn organic shell layer is formed on the surface, and the phase separation of an organic matrix and an inorganic phase is weakened according to the similarity and intermiscibility principle, so that the dispersion of inorganic powder in the organic matrix is facilitated; because the high-hardness and high-strength mixed filler can be used as a stress supporting point to bear external load in the friction process, the direct contact between the polymer matrix of the composite material and a friction pair is avoided, and the load is borne and transferred, so that the hardness of the composite material is improved on the whole, the matrix of the coating is effectively protected, and the wear resistance of the composite coating is improved; when the wear-resistant filler is worn, the load mainly occurs between the wear-resistant filler and the mating part, so that the contact area between the base body and the opposite grinding surface is effectively reduced, the adhesive wear is reduced, and the friction factor is reduced; meanwhile, C ═ C double bonds introduced into the surface of the modified mixed filler can generate crosslinking reaction with unsaturated bonds in resin to generate a more compact inorganic/organic coating, so that the wear resistance of the coating is greatly enhanced;
lubricating filler is doped in the coating, wear-resistant filler is matched for the coating to play a role in lubrication, the lubricating filler is molybdenum disulfide, molybdenum disulfide molecules are in a hexagonal layered structure, the molecular arrangement of the molybdenum disulfide molecules is that molybdenum atoms are arranged in the middle, sulfur atoms are arranged on the outer layer, and microscopically, the binding capacity of S atoms among molecular layers is weaker, so that the lubricating condition that the molecular layers are easy to move is formed, the molybdenum disulfide plays an excellent role in lubrication in a coating film, 2 contact surfaces meet good lubricating requirements, and the effect of reducing abrasion and friction is achieved;
the coating disclosed by the invention adopts the modified polyester resin as a coating film forming matrix, and the modified polyester resin has better water resistance, wear resistance, impact resistance and other properties; the wear-resistant filler is added into the coating, the wear-resistant filler can be well dispersed in a resin matrix to play a role in bearing and dispersing load, and C ═ C double bonds introduced into the surface of the modified mixed filler can perform a crosslinking reaction with unsaturated bonds in the resin to generate a tighter inorganic/organic coating, so that the wear resistance of the coating is greatly enhanced; in addition, volatile organic gas is not generated in the preparation process of the coating, so that the environment-friendly concept is met; the obtained paint has excellent wear resistance and water resistance, and can meet the requirements of spraying process of automobiles on production lines.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The environment-friendly wear-resistant coating for the automobile is prepared from the following raw materials in parts by weight: 50-60 parts of modified polyester resin, 2.5-3 parts of wear-resistant filler, 1-1.5 parts of lubricating filler, 1-1.6 parts of curing agent, 0.2-0.3 part of defoaming agent, 0.3-0.4 part of anti-settling agent, 0.2-0.3 part of flatting agent, 0.1-0.2 part of ultraviolet absorbent, 5-8 parts of styrene and 40-50 parts of N, N-dimethylformamide;
the curing agent is an N3390 type isocyanate curing agent;
the defoaming agent is BYK-066N, BYK-054;
the anti-settling agent is BYK-410 and can also be used as an anti-sagging auxiliary agent, and the modified urea type auxiliary agent can be used for thick coating during coating construction and does not influence the gloss of a coating film;
the leveling agent is BYK-378, which can obviously improve the surface smoothness of the coating and improve the stain resistance and wear resistance of the coating;
the lubricating filler is molybdenum disulfide, molybdenum disulfide molecules are in a hexagonal layered structure, the molecular arrangement of the molybdenum disulfide molecules is that molybdenum atoms are arranged in the middle, sulfur atoms are arranged on the outer layer, and microscopically, the bonding capability of S atoms among molecular layers is weaker, so that the lubricating condition that the molecular layers are easy to move is formed, the molybdenum disulfide has an excellent lubricating effect in a coating, 2 contact surfaces meet good lubricating requirements, and the effect of reducing abrasion and friction is achieved;
the wear-resistant filler is prepared by the following method:
(1) mixing sodium iron titanate whiskers and aluminum oxide according to a mass ratio of 10:3-4, and drying in a drying oven at 110 ℃ for 60min to obtain a mixed filler;
(2) weighing 3.2g of the mixed filler, putting the mixed filler into a three-neck flask filled with 50mL of n-hexane, performing ultrasonic dispersion for 90min, then dropwise adding 2.5mL of dimethyldichlorosilane into the flask, dropwise adding 10mL of distilled water, reacting for 8h at the constant temperature of 65 ℃, repeatedly filtering and washing with absolute ethyl alcohol immediately after the reaction is finished till the mixture is neutral, and then performing vacuum drying for 3-4h at 40 ℃;
(3) adding 80mL of toluene and 5mL of gamma-glycidoxypropyltrimethoxysilane into a 150mL round-bottom flask, stirring at constant temperature of 30 ℃ for 30min, adding the product obtained in the previous step, performing ultrasonic dispersion for 80min, heating to 70 ℃, stirring at constant temperature for reaction for 3-4h, filtering and washing repeatedly with absolute ethyl alcohol immediately after the reaction is finished until the reaction is neutral, and performing vacuum drying at 45 ℃ to obtain the wear-resistant filler;
the sodium iron titanate whisker has excellent mechanical and physicochemical properties such as high strength, wear resistance, high temperature resistance, acid and alkali resistance and the like, can effectively improve the mechanical property of the composite material, and improves the wear resistance, heat resistance, size stability and the like of the material; the aluminum oxide has high hardness, high temperature resistance and fire resistance, but is inferior to sodium ferric sulfate whiskers in improving the wear resistance and the en-type heat resistance of the material, and the aluminum oxide partially replaces the sodium ferric titanate whiskers, so that the price of the aluminum oxide is low, and the production cost can be reduced; secondly, the surface of the alumina contains more hydroxyl groups, so that the subsequent modification treatment of the filler is easy;
sodium iron titanate whisker and alumina surface both contain hydroxyl, the Si-Cl of dimethyldichlorosilane reacts with hydroxyl to generate-O-Si-OH which is grafted on the surface of the filler, and the hydroxyl on the-O-Si-OH is further grafted with the Si-O-CH of gamma-glycidoxypropyltrimethoxysilane3Reacting to graft the molecular chain of gamma-glycidoxypropyltrimethoxysilane to the tail end of dimethyldichlorosilane to form a layer of organic shell on the surface of the mixed filler, and weakening the phase separation of the organic matrix and the inorganic phase according to the similarity and intermiscibility principle, thereby being beneficial to the dispersion of inorganic powder in the organic matrix;
because the high-hardness and high-strength mixed filler can be used as a stress supporting point to bear external load in the friction process, the direct contact between the polymer matrix of the composite material and a friction pair is avoided, and the load is borne and transferred, so that the hardness of the composite material is improved on the whole, the matrix of the coating is effectively protected, and the wear resistance of the composite coating is improved; when the wear-resistant filler is worn, the load mainly occurs between the wear-resistant filler and the mating part, so that the contact area between the base body and the opposite grinding surface is effectively reduced, the adhesive wear is reduced, and the friction factor is reduced; meanwhile, C ═ C double bonds introduced into the surface of the modified mixed filler can generate crosslinking reaction with unsaturated bonds in resin to generate a more compact inorganic/organic coating, so that the wear resistance of the coating is greatly enhanced;
the modified polyester resin is prepared by the following method:
(1) adding hexahydrophthalic anhydride and 1, 6-hexanediol into a three-mouth reaction bottle with a nitrogen protection and condenser, heating to melt, starting stirring, heating to 140 ℃, and keeping the temperature for 1 h;
(2) cooling the system to 80 ℃, adding dimethylbenzene, monobutyl tin oxide, tertiary carbonic acid glycidyl ester, 1, 4-cyclohexanedimethanol, trimethylolpropane and trihydroxyethyl urea isocyanate, heating to 160 ℃ under stirring, refluxing and dehydrating for 4 hours, heating to 220 ℃ according to the heating rate of 10 ℃/h, and stopping reaction when the measured acid value is less than or equal to 3.5mgKOH/g to obtain polyester resin;
(3) mixing polyester resin and organic silicon resin according to the mass ratio of 2:1, and carrying out copolymerization reaction to obtain modified polyester resin;
wherein the mass ratio of the added 1, 4-cyclohexanedimethanol, the added trihydroxyethyl urea isocyanate and the added trimethylolpropane is 0.3:0.4: 1; the addition amounts of the monobutyl tin oxide and the tertiary carbonic acid glycidyl ester are respectively 1 percent and 15 percent of the mass of the system;
in the initial reaction stage, dihydric alcohol with a linear structure is introduced into the middle of a rigid six-membered ring of 2 hexahydrophthalic anhydride by utilizing the reaction of hydroxyl ring-opening anhydride, the structure not only can greatly improve the flexibility of polyester resin, but also avoids the increase of resin viscosity caused by carbon chain winding due to the steric effect of the 2 six-membered rings, 1, 4-cyclohexanedimethanol is introduced in the later stage of polyester synthesis, the 1, 4-cyclohexanedimethanol has a saturated six-membered ring structure as with hexahydrophthalic anhydride and has good weather resistance,the hardness and the flexibility are considered, and the polyester resin prepared by using the 1, 4-cyclohexanedimethanol has more excellent hydrolysis resistance; in addition, the six-membered ring in the alicyclic dibasic acid has a structure similar to that of an aromatic benzene ring, the Tg of the alicyclic dibasic acid is slightly lower than that of the aromatic dibasic acid, certain rigidity and oil resistance can be provided for resin, and meanwhile, the aliphatic long carbon chain can rotate freely, so that the flexibility of a high polymer can be improved, and the requirement on the impact resistance of a coating film can be met; furthermore, hexahydrophthalic anhydride and adipic acid do not have benzene ring structures, so that the phenomena of severe light loss and aging of a coating film due to ultraviolet light absorption are avoided, and the weather resistance of the coating film is enhanced; the trishydroxyethyl urea isocyanate contained in the polyester resin, the-CH thereof2-CH2-OH reacts with-Si-O-on the organic silicon resin to obtain organic silicon resin modified polyester resin; the heat-resistant temperature of the polyester resin is 155 ℃, the heat-resistant temperature of the organic silicon resin is 300 ℃, and the heat-resistant temperature of the organic silicon resin copolymerization modified polyester resin is 200-250 ℃, so that the heat-resistant performance of the coating film can be improved through modification of the organic silicon resin, and the organic silicon resin contains a large amount of Si-O-Si covalent bond networks with good wear resistance, has good compactness and wear resistance, and can improve the wear resistance of the polyester resin; the polyester resin is modified by the organic silicon resin, so that the water resistance is improved, the surface free energy of the modified polyester resin is reduced along with the increase of the content of the organic silicon, the surface free energy of the polyester resin can be reduced to a great extent by using a small amount of the organic silicon, and the reduction of the surface free energy is favorable for improving the water resistance of a coating film;
the preparation method of the environment-friendly wear-resistant coating for the automobile comprises the following steps:
step S1, adding the modified polyester resin into N, N-dimethylformamide, and heating to dissolve the modified polyester resin;
step S2, adding styrene, wear-resistant filler and lubricating filler, stirring at normal temperature of 200r/min for 30-40min, adding defoamer, anti-settling agent, leveling agent and ultraviolet absorbent, and continuing stirring at 200r/min for 20-30 min;
and step S3, finally adding a curing agent, and stirring for 10min to obtain the environment-friendly wear-resistant paint for the automobile.
Example 1
The environment-friendly wear-resistant coating for the automobile is prepared from the following raw materials in parts by weight: 50 parts of modified polyester resin, 2.5 parts of wear-resistant filler, 1 part of lubricating filler, 1 part of curing agent, 0.2 part of defoaming agent, 0.3 part of anti-settling agent, 0.2 part of leveling agent, 0.1 part of ultraviolet absorbent, 5 parts of styrene and 40 parts of N, N-dimethylformamide;
the coating is prepared by the following steps:
step S1, adding the modified polyester resin into N, N-dimethylformamide, and heating to dissolve the modified polyester resin;
step S2, adding styrene, wear-resistant filler and lubricating filler, stirring at normal temperature of 200r/min for 30min, adding a defoaming agent, an anti-settling agent, a leveling agent and an ultraviolet absorbent, and continuing stirring at 200r/min for 20 min;
and step S3, finally adding a curing agent, and stirring for 10min to obtain the environment-friendly wear-resistant paint for the automobile.
Example 2
The environment-friendly wear-resistant coating for the automobile is prepared from the following raw materials in parts by weight: 55 parts of modified polyester resin, 2.8 parts of wear-resistant filler, 1.3 parts of lubricating filler, 1.3 parts of curing agent, 0.25 part of defoaming agent, 0.35 part of anti-settling agent, 0.25 part of flatting agent, 0.15 part of ultraviolet absorbent, 6.5 parts of styrene and 45 parts of N, N-dimethylformamide;
the coating is prepared by the following steps:
step S1, adding the modified polyester resin into N, N-dimethylformamide, and heating to dissolve the modified polyester resin;
step S2, adding styrene, wear-resistant filler and lubricating filler, stirring at normal temperature of 200r/min for 35min, adding a defoaming agent, an anti-settling agent, a leveling agent and an ultraviolet absorbent, and continuing stirring at 200r/min for 25 min;
and step S3, finally adding a curing agent, and stirring for 10min to obtain the environment-friendly wear-resistant paint for the automobile.
Example 3
The environment-friendly wear-resistant coating for the automobile is prepared from the following raw materials in parts by weight: 60 parts of modified polyester resin, 3 parts of wear-resistant filler, 1.5 parts of lubricating filler, 1.6 parts of curing agent, 0.3 part of defoaming agent, 0.4 part of anti-settling agent, 0.3 part of flatting agent, 0.2 part of ultraviolet absorbent, 8 parts of styrene and 50 parts of N, N-dimethylformamide;
the coating is prepared by the following steps:
step S1, adding the modified polyester resin into N, N-dimethylformamide, and heating to dissolve the modified polyester resin;
step S2, adding styrene, wear-resistant filler and lubricating filler, stirring at normal temperature of 200r/min for 40min, adding a defoaming agent, an anti-settling agent, a leveling agent and an ultraviolet absorbent, and continuing stirring at 200r/min for 30 min;
and step S3, finally adding a curing agent, and stirring for 10min to obtain the environment-friendly wear-resistant paint for the automobile.
Comparative example 1
The modified polyester resin in example 1 was changed to a general commercially available resin, and the preparation process was not changed.
Comparative example 2
The raw materials of the wear-resistant filler in the example 1 are removed, and the preparation process is unchanged.
Comparative example 3
The lubricating filler material of example 1 was removed and the remainder was unchanged.
Comparative example 4
Common commercial automotive coatings.
The coatings prepared in examples 1 to 3 and comparative examples 1 to 4 were subjected to the following property tests:
preparing a coating on a tinplate which is polished by water sand paper with the grain diameter of 0.0308mm and wiped by absolute ethyl alcohol by using a 400-micrometer coating preparation device, and curing for 7d at normal temperature;
coating adhesion: testing was performed according to GB/T9286-1998; the coating hardness was tested according to GB/T6739-; abrasion resistance test of the coating: after the surface of the coating is uniformly wiped by 0000# steel wool, the light transmittance and the haze of the coating are tested by an SGW-820 light transmittance/haze tester; boiling resistance: placing the cured sample plate in 100 ℃ boiling water to boil for a certain time, and testing the adhesive force of the coating according to an adhesive force testing method;
it can be known that the adhesion grades of the coatings prepared in the examples 1 to 3 reach 2 grades, the hardness reaches 4H, in terms of wear resistance, the light transmittance after polishing is 89.9 to 90.2%, and the haze is 3.25 to 3.32%, and by combining with the comparative example 2, the wear-resistant filler can effectively enhance the wear-resistant performance of the coating, and by combining with the comparative example 3, the lubricating filler is added to play an auxiliary role in the wear-resistant filler to enhance the wear-resistant performance of the coating; the adhesion force of the coating prepared in the examples 1-3 is basically unchanged after boiling for 1h and 2h, and is 2 grade, which shows that the water resistance of the coating is good, and the modified polyester resin can enhance the water resistance of the coating by combining the comparative example 1.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (2)
1. The environment-friendly wear-resistant coating for the automobile is characterized by being prepared from the following raw materials in parts by weight: 50-60 parts of modified polyester resin, 2.5-3 parts of wear-resistant filler, 1-1.5 parts of lubricating filler, 1-1.6 parts of curing agent, 0.2-0.3 part of defoaming agent, 0.3-0.4 part of anti-settling agent, 0.2-0.3 part of flatting agent, 0.1-0.2 part of ultraviolet absorbent, 5-8 parts of styrene and 40-50 parts of N, N-dimethylformamide;
the wear-resistant filler is prepared by the following method:
(1) mixing sodium iron titanate whiskers and aluminum oxide according to a mass ratio of 10:3-4, and drying in a drying oven at 110 ℃ for 60min to obtain a mixed filler;
(2) weighing 3.2g of the mixed filler, putting the mixed filler into a three-neck flask filled with 50mL of n-hexane, performing ultrasonic dispersion for 90min, then dropwise adding 2.5mL of dimethyldichlorosilane into the flask, dropwise adding 10mL of distilled water, reacting for 8h at the constant temperature of 65 ℃, repeatedly filtering and washing with absolute ethyl alcohol immediately after the reaction is finished till the mixture is neutral, and then performing vacuum drying for 3-4h at the temperature of 40 ℃ to obtain a product;
(3) adding 80mL of toluene and 5mL of gamma-glycidoxypropyltrimethoxysilane into a 150mL round-bottom flask, stirring at constant temperature of 30 ℃ for 30min, adding the product obtained in the step (2), performing ultrasonic dispersion for 80min, heating to 70 ℃, stirring at constant temperature for reaction for 3-4h, filtering and washing repeatedly with absolute ethyl alcohol immediately after the reaction is finished until the reaction is neutral, and performing vacuum drying at 45 ℃ to obtain the wear-resistant filler;
the modified polyester resin is prepared by the following method:
(1) adding hexahydrophthalic anhydride and 1, 6-hexanediol into a three-mouth reaction bottle with a nitrogen protection and condenser, heating to melt, starting stirring, heating to 140 ℃, and keeping the temperature for 1 h;
(2) cooling the system to 80 ℃, adding dimethylbenzene, monobutyl tin oxide, tertiary carbonic acid glycidyl ester, 1, 4-cyclohexanedimethanol, trimethylolpropane and trihydroxyethyl urea isocyanate, heating to 160 ℃ under stirring, refluxing and dehydrating for 4 hours, heating to 220 ℃ according to the heating rate of 10 ℃/h, and stopping reaction when the measured acid value is less than or equal to 3.5mgKOH/g to obtain polyester resin;
(3) mixing polyester resin and organic silicon resin according to the mass ratio of 2:1, and carrying out copolymerization reaction to obtain modified polyester resin;
the preparation method of the environment-friendly wear-resistant coating for the automobile comprises the following steps:
step S1, adding the modified polyester resin into N, N-dimethylformamide, and heating to dissolve the modified polyester resin;
step S2, adding styrene, wear-resistant filler and lubricating filler, stirring at normal temperature of 200r/min for 30-40min, adding defoamer, anti-settling agent, leveling agent and ultraviolet absorbent, and continuing stirring at 200r/min for 20-30 min;
and step S3, finally adding a curing agent, and stirring for 10min to obtain the environment-friendly wear-resistant paint for the automobile.
2. The preparation method of the environment-friendly wear-resistant coating for the automobile as claimed in claim 1, characterized by comprising the following steps:
step S1, adding the modified polyester resin into N, N-dimethylformamide, and heating to dissolve the modified polyester resin;
step S2, adding styrene, wear-resistant filler and lubricating filler, stirring at normal temperature of 200r/min for 30-40min, adding defoamer, anti-settling agent, leveling agent and ultraviolet absorbent, and continuing stirring at 200r/min for 20-30 min;
and step S3, finally adding a curing agent, and stirring for 10min to obtain the environment-friendly wear-resistant paint for the automobile.
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20220523 Granted publication date: 20210713 Pledgee: Agricultural Bank of China Limited Heshan sub branch Pledgor: Guangdong paint color new material Co.,Ltd. Registration number: Y2022980003239 |