CN114752286A - Corrosion-resistant water-based polyester coating for automobile shell and preparation method thereof - Google Patents
Corrosion-resistant water-based polyester coating for automobile shell and preparation method thereof Download PDFInfo
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- CN114752286A CN114752286A CN202210460163.2A CN202210460163A CN114752286A CN 114752286 A CN114752286 A CN 114752286A CN 202210460163 A CN202210460163 A CN 202210460163A CN 114752286 A CN114752286 A CN 114752286A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 98
- 238000005260 corrosion Methods 0.000 title claims abstract description 71
- 238000000576 coating method Methods 0.000 title claims abstract description 66
- 239000011248 coating agent Substances 0.000 title claims abstract description 64
- 230000007797 corrosion Effects 0.000 title claims abstract description 50
- 229920000728 polyester Polymers 0.000 title claims abstract description 41
- 238000002360 preparation method Methods 0.000 title claims description 25
- 229920001225 polyester resin Polymers 0.000 claims abstract description 45
- 239000004645 polyester resin Substances 0.000 claims abstract description 45
- 239000000049 pigment Substances 0.000 claims abstract description 33
- 239000003381 stabilizer Substances 0.000 claims abstract description 31
- 239000002270 dispersing agent Substances 0.000 claims abstract description 29
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 28
- 239000008367 deionised water Substances 0.000 claims abstract description 28
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 28
- 239000000945 filler Substances 0.000 claims abstract description 26
- 239000000080 wetting agent Substances 0.000 claims abstract description 23
- 239000002994 raw material Substances 0.000 claims abstract description 20
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 15
- 239000000203 mixture Substances 0.000 claims description 32
- 238000003756 stirring Methods 0.000 claims description 23
- 239000003054 catalyst Substances 0.000 claims description 16
- 238000010438 heat treatment Methods 0.000 claims description 16
- 238000006243 chemical reaction Methods 0.000 claims description 15
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical group CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 claims description 11
- 230000004048 modification Effects 0.000 claims description 9
- 238000012986 modification Methods 0.000 claims description 9
- 239000002253 acid Substances 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 8
- 230000032050 esterification Effects 0.000 claims description 8
- 238000005886 esterification reaction Methods 0.000 claims description 8
- 239000011259 mixed solution Substances 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- 239000004814 polyurethane Substances 0.000 claims description 8
- 229920002635 polyurethane Polymers 0.000 claims description 8
- 150000005846 sugar alcohols Polymers 0.000 claims description 8
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 6
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 4
- 229920000570 polyether Polymers 0.000 claims description 4
- 229920001296 polysiloxane Polymers 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 3
- 239000010445 mica Substances 0.000 claims description 3
- 229910052618 mica group Inorganic materials 0.000 claims description 3
- OEOIWYCWCDBOPA-UHFFFAOYSA-N 6-methyl-heptanoic acid Chemical compound CC(C)CCCCC(O)=O OEOIWYCWCDBOPA-UHFFFAOYSA-N 0.000 claims description 2
- JLTDJTHDQAWBAV-UHFFFAOYSA-N N,N-dimethylaniline Chemical compound CN(C)C1=CC=CC=C1 JLTDJTHDQAWBAV-UHFFFAOYSA-N 0.000 claims description 2
- GLMOMDXKLRBTDY-UHFFFAOYSA-A [V+5].[V+5].[V+5].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O Chemical compound [V+5].[V+5].[V+5].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O GLMOMDXKLRBTDY-UHFFFAOYSA-A 0.000 claims description 2
- 239000006229 carbon black Substances 0.000 claims description 2
- 239000010941 cobalt Substances 0.000 claims description 2
- 229910017052 cobalt Inorganic materials 0.000 claims description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 2
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 2
- GEMHFKXPOCTAIP-UHFFFAOYSA-N n,n-dimethyl-n'-phenylcarbamimidoyl chloride Chemical compound CN(C)C(Cl)=NC1=CC=CC=C1 GEMHFKXPOCTAIP-UHFFFAOYSA-N 0.000 claims description 2
- 239000002736 nonionic surfactant Substances 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 125000005372 silanol group Chemical group 0.000 claims description 2
- 239000004408 titanium dioxide Substances 0.000 claims description 2
- 239000012002 vanadium phosphate Substances 0.000 claims description 2
- ADJMNWKZSCQHPS-UHFFFAOYSA-L zinc;6-methylheptanoate Chemical compound [Zn+2].CC(C)CCCCC([O-])=O.CC(C)CCCCC([O-])=O ADJMNWKZSCQHPS-UHFFFAOYSA-L 0.000 claims description 2
- -1 polysiloxane Polymers 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 15
- 238000005299 abrasion Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 6
- 239000002131 composite material Substances 0.000 abstract description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 abstract description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 2
- 239000000805 composite resin Substances 0.000 abstract description 2
- 239000006115 industrial coating Substances 0.000 abstract description 2
- 239000001301 oxygen Substances 0.000 abstract description 2
- 229910052760 oxygen Inorganic materials 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 239000012791 sliding layer Substances 0.000 abstract description 2
- 230000002209 hydrophobic effect Effects 0.000 abstract 1
- 239000003795 chemical substances by application Substances 0.000 description 8
- 150000001412 amines Chemical class 0.000 description 7
- 238000010790 dilution Methods 0.000 description 7
- 239000012895 dilution Substances 0.000 description 7
- 238000001914 filtration Methods 0.000 description 7
- 230000007613 environmental effect Effects 0.000 description 6
- 239000013530 defoamer Substances 0.000 description 5
- 239000003973 paint Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 230000002708 enhancing effect Effects 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction 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
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paints Or Removers (AREA)
Abstract
The invention relates to the technical field of water-based industrial coatings, and discloses a corrosion-resistant water-based polyester coating for an automobile shell, which comprises the following raw materials in parts by weight: 50-70 parts of water-based polyester resin, 2-8 parts of pigment, 0.2-0.5 part of wetting agent, 0.1-0.4 part of dispersing agent, 10-30 parts of deionized water, 15-30 parts of anti-corrosion filler, 0.2-0.5 part of stabilizer, 0.3-0.8 part of accelerator and 0.5-1 part of defoaming agent. According to the invention, the graphene is introduced into the water-based polyester resin, and has good hydrophobic property and good mechanical property, so that the graphene can block the permeation of water, oxygen, chloride ions and the like in the environment, the corrosion resistance of the coating is improved, meanwhile, the hardness of the composite coating is enhanced, in the abrasion process, the graphene forms a sliding layer and friction heat is rapidly transferred and dissipated, so that the abrasion resistance of the coating is enhanced, the local damage of the coating can be durably avoided by the graphene resin composite coating, and the service life of the coating is prolonged.
Description
Technical Field
The invention relates to the technical field of water-based industrial coatings, in particular to a corrosion-resistant water-based polyester coating for an automobile shell and a preparation method thereof.
Background
With the national environmental protection and the continuous emergence of the relevant environmental protection policies, the environmental protection water-based paint is absolutely necessary to replace the solvent-based paint. In order to reduce and avoid the serious pollution caused by VOC released from organic solvent, the water paint is widely used. With the improvement of living standard, people have higher and higher requirements on automobile coating, even new requirements on coating of trucks and motorcycles, and the automobile coating gradually develops towards the directions of environmental protection, high performance, high gloss and diversified colors. The water-based automobile coating has the characteristics of hard and bright film, bright color, good environmental protection, flexibility, impact resistance, weather resistance, heat-resistant baking property, gloss retention, chemical resistance, quick drying, good adhesive force, high brightness and the like, is simple to construct, strong in environmental protection and low in price, and is a development trend in recent years.
However, the existing water-based paint still has the phenomena of poor corrosion resistance and low wear resistance of a coating film in the using process, so that the corrosion-resistant water-based polyester paint for the automobile shell is continuously ground for solving the problems.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the corrosion-resistant waterborne polyester coating for the automobile shell and the preparation method thereof, which have the advantages of enhancing the corrosion resistance and the wear resistance of a coating film layer and solve the problems of low corrosion resistance and poor wear resistance of the conventional waterborne coating.
(II) technical scheme
In order to achieve the purpose of enhancing the advantages of the corrosion resistance and the wear resistance of the coating film, the invention provides the following technical scheme: the corrosion-resistant water-based polyester coating for the automobile shell comprises the following raw materials in parts by weight: 50-70 parts of water-based polyester resin, 2-8 parts of pigment, 0.2-0.5 part of wetting agent, 0.1-0.4 part of dispersing agent, 10-30 parts of deionized water, 15-30 parts of anti-corrosion filler, 0.2-0.5 part of stabilizer, 0.3-0.8 part of accelerator and 0.5-1 part of defoaming agent.
Preferably, the corrosion-resistant water-based polyester coating for the automobile shell comprises the following raw materials in parts by weight: 50-60 parts of water-based polyester resin, 2-6 parts of pigment, 0.2-0.4 part of wetting agent, 0.1-0.3 part of dispersing agent, 10-25 parts of deionized water, 15-25 parts of anti-corrosion filler, 0.2-0.4 part of stabilizer, 0.3-0.5 part of accelerator and 0.5-0.8 part of defoaming agent.
Preferably, the corrosion-resistant water-based polyester coating for the automobile shell comprises the following raw materials in parts by weight: 50 parts of water-based polyester resin, 4 parts of pigment, 0.2 part of wetting agent, 0.2 part of dispersing agent, 15 parts of deionized water, 15 parts of anti-corrosion filler, 0.2 part of stabilizer, 0.3 part of accelerator and 0.5 part of defoaming agent.
Preferably, the pigment is one of titanium dioxide, pigment carbon black, scarlet powder and talcum powder, and the anticorrosive filler is graphene, mica iron oxide, sericite and glass flakes.
Preferably, the wetting agent is a silanol nonionic surfactant, and specifically is one of GSK-588, GSK-582 and GSK-585, the dispersant is one of tegodipers 757W dispersant, tegodipers 750W dispersant or tegodipers 755W dispersant, and the defoamer is one of polyether defoamer, silicone defoamer, polyether modified silicone vial defoamer or silicone defoamer.
Preferably, the stabilizer is glycol ether EB; butyl cellosolve; butoxyethanol; ethylene glycol monobutyl ether; 2-n-butoxyethanol; the ethylene glycol monobutyl ether is one of cobalt naphthenate, cobalt isooctanoate, zinc isooctanoate, N-dimethylaniline, N-diethylaniline and vanadium phosphate.
The invention also provides a corrosion-resistant waterborne polyester coating for the automobile shell and a preparation method thereof, and the corrosion-resistant waterborne polyester coating comprises the following specific steps:
s1, mixing the polyhydric alcohol and the dibasic acid, adding the mixture into a reaction kettle with a thermometer, a stirrer and a condensing device, heating to 190 ℃ for 160-;
s2, cooling the mixed solution a in the step 1 to 90-120 ℃, adding an esterification catalyst, a modification catalyst and waterborne polyurethane, heating to 150-190 ℃, after the raw materials in the reaction kettle are completely fused, reducing the temperature to 90-120 ℃, simultaneously adding organic amine, stirring to adjust the pH value to be qualified, adding deionized water for dilution and filtration, and standing for 30 minutes to obtain the waterborne polyester resin.
S3, adding 0.2-0.5 part of wetting agent and 0.1-0.4 part of dispersing agent into 50-70 parts of water-based polyester resin, stirring uniformly, adding 2-8 parts of pigment and 15-30 parts of anti-corrosion filler, and dispersing by a grinder until the fineness of the anti-corrosion filler and the pigment in the water-based polyester resin reaches 10-20um to obtain a mixture a;
s4, adding 0.5-1 part of defoaming agent, 0.2-0.5 part of stabilizer and 0.3-0.8 part of accelerator into the mixture a prepared in the step 1, stirring for 8-15min until the mixture a is completely mixed with the defoaming agent, the stabilizer and the accelerator, and adding 10-30 parts of deionized water to adjust the viscosity to be qualified, thus obtaining the corrosion-resistant water-based polyester coating for the automobile shell.
(III) advantageous effects
Compared with the prior art, the invention provides the corrosion-resistant water-based polyester coating for the automobile shell and the preparation method thereof, and the corrosion-resistant water-based polyester coating has the following beneficial effects:
1. the device can block the permeation of water, oxygen, chloride ions and the like in the environment due to the introduction of graphene into the water-based polyester resin, and meanwhile, the graphene anti-corrosion coating which is uniformly dispersed and oriented parallel to the surface of the substrate can form a labyrinth barrier to block the permeation path of corrosive media and block the passage formed by a primary battery, so that the corrosion rate of the substrate is delayed, and meanwhile, due to the good mechanical property of the graphene, the common resin coating has poor scratch resistance, the composite coating has excellent elasticity and deformation resistance due to the doping of the graphene, the hardness of the composite coating is enhanced, the graphene forms a sliding layer and friction heat is rapidly transferred and dissipated in the abrasion process, so that the abrasion resistance of the coating is enhanced, and the graphene resin composite coating can permanently avoid the local damage of the coating, the service life of the coating is prolonged.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious 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 first embodiment is as follows:
the corrosion-resistant water-based polyester coating for the automobile shell comprises the following raw materials in parts by weight: 50 parts of water-based polyester resin, 4 parts of pigment, 0.2 part of wetting agent, 0.2 part of dispersing agent, 15 parts of deionized water, 15 parts of anti-corrosion filler, 0.2 part of stabilizer, 0.3 part of accelerator and 0.5 part of accelerator.
The preparation method of the waterborne polyester resin comprises the following specific steps:
s1, mixing the polyhydric alcohol and the dibasic acid, adding the mixture into a reaction kettle with a thermometer, a stirrer and a condensing device, heating to 190 ℃ for 160-;
s2, cooling the mixed solution a in the step 1 to 90-120 ℃, adding an esterification catalyst, a modification catalyst and waterborne polyurethane, heating to 150-190 ℃, after the raw materials in the reaction kettle are completely fused, reducing the temperature to 90-120 ℃, simultaneously adding organic amine, stirring to adjust the pH value to be qualified, adding deionized water for dilution and filtration, and standing for 30 minutes to obtain the waterborne polyester resin.
The invention also provides an automobile shell corrosion-resistant water-based polyester coating and a preparation method thereof, wherein the preparation method comprises the following steps: the method comprises the following specific steps:
s1, adding 0.2 part of wetting agent and 0.2 part of dispersing agent into 50 parts of water-based polyester resin, stirring uniformly, adding 4 parts of pigment and 15 parts of graphene, and dispersing by a grinder until the fineness of the anticorrosive filler and the pigment in the water-based polyester resin reaches 10-20 mu m to obtain a mixture a
S2, adding 0.5 part of defoaming agent, 0.2 part of stabilizing agent and 0.3 part of accelerating agent into the mixture a prepared in the step 1, stirring for 8-15min until the mixture a is completely mixed with the defoaming agent, the stabilizing agent and the accelerating agent, and adding 15 parts of deionized water to adjust the viscosity to be qualified, thus obtaining the corrosion-resistant waterborne polyester coating for the automobile shell.
Example two:
the corrosion-resistant water-based polyester coating for the automobile shell comprises the following raw materials in parts by weight: 50 parts of water-based polyester resin, 4 parts of pigment, 0.2 part of wetting agent, 0.2 part of dispersing agent, 15 parts of deionized water, 15 parts of anti-corrosion filler, 0.2 part of stabilizer, 0.3 part of accelerator and 0.5 part of accelerator.
The preparation method of the waterborne polyester resin comprises the following specific steps:
s1, mixing the polyhydric alcohol and the dibasic acid, adding the mixture into a reaction kettle with a thermometer, a stirrer and a condensing device, heating to 190 ℃ for 160-;
s2, cooling the mixed solution a in the step 1 to 90-120 ℃, adding an esterification catalyst, a modification catalyst and waterborne polyurethane, heating to 150-190 ℃, after the raw materials in the reaction kettle are completely fused, reducing the temperature to 90-120 ℃, simultaneously adding organic amine, stirring to adjust the pH value to be qualified, adding deionized water for dilution and filtration, and standing for 30 minutes to obtain the waterborne polyester resin.
The invention also provides an automobile shell corrosion-resistant water-based polyester coating and a preparation method thereof, wherein the preparation method comprises the following steps: the method comprises the following specific steps:
s1, adding 0.2 part of wetting agent and 0.2 part of dispersing agent into 50 parts of water-based polyester resin, stirring uniformly, adding 4 parts of pigment and 15 parts of graphene, and dispersing by a grinder until the fineness of the anticorrosive filler and the pigment in the water-based polyester resin reaches 20-40 mu m to obtain a mixture a
S2, adding 0.5 part of defoaming agent, 0.2 part of stabilizer and 0.3 part of accelerator into the mixture a prepared in the step 1, stirring for 8-15min until the mixture a is completely mixed with the defoaming agent, the stabilizer and the accelerator, and adding 15 parts of deionized water to adjust the viscosity to be qualified, thus obtaining the corrosion-resistant waterborne polyester coating for the automobile shell.
Example three:
the corrosion-resistant water-based polyester coating for the automobile shell comprises the following raw materials in parts by weight: 50 parts of water-based polyester resin, 4 parts of pigment, 0.2 part of wetting agent, 0.2 part of dispersing agent, 15 parts of deionized water, 25 parts of anti-corrosion filler, 0.2 part of stabilizing agent, 0.3 part of accelerating agent and 0.5 part of accelerating agent.
The preparation method of the waterborne polyester resin comprises the following specific steps:
s1, mixing the polyhydric alcohol and the dibasic acid, adding the mixture into a reaction kettle with a thermometer, a stirrer and a condensing device, heating to 190 ℃ for 160-;
s2, cooling the mixed solution a in the step 1 to 90-120 ℃, adding an esterification catalyst, a modification catalyst and waterborne polyurethane, heating to 150-190 ℃, after the raw materials in the reaction kettle are completely fused, reducing the temperature to 90-120 ℃, simultaneously adding organic amine, stirring to adjust the pH value to be qualified, adding deionized water for dilution and filtration, and standing for 30 minutes to obtain the waterborne polyester resin.
The invention also provides an automobile shell corrosion-resistant water-based polyester coating and a preparation method thereof, wherein the preparation method comprises the following steps: the method comprises the following specific steps:
s1, adding 0.2 part of wetting agent and 0.2 part of dispersing agent into 50 parts of water-based polyester resin, stirring uniformly, adding 4 parts of pigment and 25 parts of graphene, and dispersing by a grinder until the fineness of the anticorrosive filler and the pigment in the water-based polyester resin reaches 10-20 mu m to obtain a mixture a
S2, adding 0.5 part of defoaming agent, 0.2 part of stabilizer and 0.3 part of accelerator into the mixture a prepared in the step 1, stirring for 8-15min until the mixture a is completely mixed with the defoaming agent, the stabilizer and the accelerator, and adding 15 parts of deionized water to adjust the viscosity to be qualified, thus obtaining the corrosion-resistant waterborne polyester coating for the automobile shell.
The coatings prepared in examples one-three were tested as follows:
corrosion resistance-GB/T1771-1991; adhesion-GB/T1720-1979; abrasion resistance-GB/T23988-2009 abrasion thickness of falling sand to smear within same time
According to the table above, when the graphene accounts for 30% of the waterborne polyester resin and the grinding fineness is 10-20um, the overall corrosion resistance, adhesion and wear resistance of the coating film layer are stronger.
Example four:
the corrosion-resistant water-based polyester coating for the automobile shell comprises the following raw materials in parts by weight: 50 parts of water-based polyester resin, 4 parts of pigment, 0.2 part of wetting agent, 0.2 part of dispersing agent, 15 parts of deionized water, 25 parts of anti-corrosion filler, 0.2 part of stabilizing agent, 0.3 part of accelerating agent and 0.5 part of accelerating agent.
The preparation method of the water-based polyester resin comprises the following specific steps:
s1, mixing the polyhydric alcohol and the dibasic acid, adding the mixture into a reaction kettle with a thermometer, a stirrer and a condensing device, heating to 190 ℃ for 160-;
s2, cooling the mixed solution a in the step 1 to 90-120 ℃, adding an esterification catalyst, a modification catalyst and waterborne polyurethane, heating to 150-190 ℃, after the raw materials in the reaction kettle are completely fused, reducing the temperature to 90-120 ℃, simultaneously adding organic amine, stirring to adjust the pH value to be qualified, adding deionized water for dilution and filtration, and standing for 30 minutes to obtain the waterborne polyester resin.
The invention also provides an automobile shell corrosion-resistant water-based polyester coating and a preparation method thereof, wherein the preparation method comprises the following steps: the method comprises the following specific steps:
s1, adding 0.2 part of wetting agent and 0.2 part of dispersing agent into 50 parts of water-based polyester resin, stirring uniformly, adding 4 parts of pigment and 25 parts of mica iron oxide, and dispersing by a grinding machine until the fineness of the anti-corrosion filler and the pigment in the water-based polyester resin reaches 10-20 mu m to obtain a mixture a
S2, adding 0.5 part of defoaming agent, 0.2 part of stabilizer and 0.3 part of accelerator into the mixture a prepared in the step 1, stirring for 8-15min until the mixture a is completely mixed with the defoaming agent, the stabilizer and the accelerator, and adding 15 parts of deionized water to adjust the viscosity to be qualified, thus obtaining the corrosion-resistant waterborne polyester coating for the automobile shell.
Example five:
the corrosion-resistant water-based polyester coating for the automobile shell comprises the following raw materials in parts by weight: 50 parts of water-based polyester resin, 4 parts of pigment, 0.2 part of wetting agent, 0.2 part of dispersing agent, 15 parts of deionized water, 25 parts of anti-corrosion filler, 0.2 part of stabilizer, 0.3 part of accelerator and 0.5 part of accelerator.
The preparation method of the water-based polyester resin comprises the following specific steps:
s1, mixing the polyhydric alcohol and the dibasic acid, adding the mixture into a reaction kettle with a thermometer, a stirrer and a condensing device, heating to 190 ℃ for 160-;
s2, cooling the mixed solution a in the step 1 to 90-120 ℃, adding an esterification catalyst, a modification catalyst and waterborne polyurethane, heating to 150-190 ℃, after the raw materials in the reaction kettle are completely fused, reducing the temperature to 90-120 ℃, simultaneously adding organic amine, stirring to adjust the pH value to be qualified, adding deionized water for dilution and filtration, and standing for 30 minutes to obtain the waterborne polyester resin.
The invention also provides an automobile shell corrosion-resistant water-based polyester coating and a preparation method thereof, wherein the preparation method comprises the following steps: the method comprises the following specific steps:
s1, adding 0.2 part of wetting agent and 0.2 part of dispersing agent into 50 parts of water-based polyester resin, stirring uniformly, adding 4 parts of pigment and 25 parts of sericite, and dispersing by a grinder until the fineness of the anti-corrosion filler and the pigment in the water-based polyester resin reaches 10-20 mu m to obtain a mixture a
S2, adding 0.5 part of defoaming agent, 0.2 part of stabilizer and 0.3 part of accelerator into the mixture a prepared in the step 1, stirring for 8-15min until the mixture a is completely mixed with the defoaming agent, the stabilizer and the accelerator, and adding 15 parts of deionized water to adjust the viscosity to be qualified, thus obtaining the corrosion-resistant waterborne polyester coating for the automobile shell.
Example six:
the corrosion-resistant water-based polyester coating for the automobile shell comprises the following raw materials in parts by weight: 50 parts of water-based polyester resin, 4 parts of pigment, 0.2 part of wetting agent, 0.2 part of dispersing agent, 15 parts of deionized water, 25 parts of anti-corrosion filler, 0.2 part of stabilizing agent, 0.3 part of accelerating agent and 0.5 part of accelerating agent.
The preparation method of the water-based polyester resin comprises the following specific steps:
s1, mixing the polyhydric alcohol and the dibasic acid, adding the mixture into a reaction kettle with a thermometer, a stirrer and a condensing device, heating to 190 ℃ for 160-;
s2, cooling the mixed solution a in the step 1 to 90-120 ℃, adding an esterification catalyst, a modification catalyst and waterborne polyurethane, heating to 150-190 ℃, after the raw materials in the reaction kettle are completely fused, reducing the temperature to 90-120 ℃, simultaneously adding organic amine, stirring to adjust the pH value to be qualified, adding deionized water for dilution and filtration, and standing for 30 minutes to obtain the waterborne polyester resin.
The invention also provides an automobile shell corrosion-resistant water-based polyester coating and a preparation method thereof, wherein the preparation method comprises the following steps: the method comprises the following specific steps:
s1, adding 0.2 part of wetting agent and 0.2 part of dispersing agent into 50 parts of water-based polyester resin, stirring uniformly, adding 4 parts of pigment and 25 parts of glass flakes, and dispersing by a grinder until the fineness of the anti-corrosion filler and the pigment in the water-based polyester resin reaches 10-20 mu m to obtain a mixture a
S2, adding 0.5 part of defoaming agent, 0.2 part of stabilizer and 0.3 part of accelerator into the mixture a prepared in the step 1, stirring for 8-15min until the mixture a is completely mixed with the defoaming agent, the stabilizer and the accelerator, and adding 15 parts of deionized water to adjust the viscosity to be qualified, thus obtaining the corrosion-resistant waterborne polyester coating for the automobile shell.
The coatings prepared in examples three to six were tested as follows:
corrosion resistance-GB/T1771-1991; adhesion-GB/T1720-1979; abrasion resistance-GB/T23988-2009 abrasion thickness of falling sand to smear within same time
The comparison in the table shows that when the anti-corrosion filler in the water-based polyester coating is graphene, the overall corrosion resistance, adhesion and wear resistance of the coating film layer are better.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The corrosion-resistant water-based polyester coating for the automobile shell is characterized by comprising the following raw materials in parts by weight: 50-70 parts of water-based polyester resin, 2-8 parts of pigment, 0.2-0.5 part of wetting agent, 0.1-0.4 part of dispersing agent, 10-30 parts of deionized water, 15-30 parts of anti-corrosion filler, 0.2-0.5 part of stabilizer, 0.3-0.8 part of accelerator and 0.5-1 part of defoaming agent.
2. The corrosion-resistant water-based polyester coating for the automobile shell, according to claim 1, is characterized by comprising the following raw materials in parts by weight: 50-60 parts of water-based polyester resin, 2-6 parts of pigment, 0.2-0.4 part of wetting agent, 0.1-0.3 part of dispersing agent, 10-25 parts of deionized water, 15-25 parts of anti-corrosion filler, 0.2-0.4 part of stabilizer, 0.3-0.5 part of accelerator and 0.5-0.8 part of defoaming agent.
3. The corrosion-resistant water-based polyester coating for the automobile shell, according to claim 2, is characterized by comprising the following raw materials in parts by weight: 50 parts of water-based polyester resin, 4 parts of pigment, 0.2 part of wetting agent, 0.2 part of dispersing agent, 15 parts of deionized water, 15 parts of anti-corrosion filler, 0.2 part of stabilizer, 0.3 part of accelerator and 0.5 part of defoaming agent.
4. The corrosion-resistant water-based polyester coating for automobile shells as claimed in claim 1, wherein: the pigment is one of titanium dioxide, pigment carbon black, scarlet powder and talcum powder, and the anti-corrosion filler is graphene, mica iron oxide, sericite and glass flakes.
5. The corrosion-resistant water-based polyester coating for automobile shells as claimed in claim 4, wherein: the wetting agent is a silanol nonionic surfactant, and is specifically one of GSK-588, GSK-582 and GSK-585, the dispersing agent is one of TEGODispers757W dispersing agent, TEGODispers750W dispersing agent or TEGODispers755W dispersing agent, and the defoaming agent is one of polyether defoaming agent, organosilicon defoaming agent, polyether modified silicon vial defoaming agent or polysiloxane defoaming agent.
6. The corrosion-resistant waterborne polyester coating of claim 1, wherein: the stabilizer is glycol ether EB; butyl cellosolve; butoxyethanol; ethylene glycol monobutyl ether; 2-n-butoxyethanol; the accelerator is one of cobalt naphthenate, cobalt isooctanoate, zinc isooctanoate, N-dimethylaniline, N-diethylaniline and vanadium phosphate.
7. The preparation method of the corrosion-resistant waterborne polyester coating for the automobile outer shell according to claim 1 is characterized by comprising the following specific steps of:
s1, mixing the polyhydric alcohol and the dibasic acid, adding the mixture into a reaction kettle with a thermometer, a stirrer and a condensing device, heating to 190 ℃ for 160-;
s2, cooling the mixed solution a in the step 1 to 90-120 ℃, adding an esterification catalyst, a modification catalyst and waterborne polyurethane, heating to 150-;
s3, adding 0.2-0.5 part of wetting agent and 0.1-0.4 part of dispersing agent into 50-70 parts of waterborne polyester resin, stirring uniformly, adding 2-8 parts of pigment and 15-30 parts of anticorrosive filler, and dispersing by a grinder until the fineness of the anticorrosive filler and the pigment in the waterborne polyester resin reaches 10-20 mu m to obtain a mixture a;
s4, adding 0.5-1 part of defoaming agent, 0.2-0.5 part of stabilizer and 0.3-0.8 part of accelerator into the mixture a prepared in the step 1, stirring for 8-15min until the mixture a is completely mixed with the defoaming agent, the stabilizer and the accelerator, and adding 10-30 parts of deionized water to adjust the viscosity to be qualified, thus obtaining the corrosion-resistant water-based polyester coating for the automobile shell.
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