CN112409854A - Stone-impact-resistant coating for low-density aluminum substrate - Google Patents
Stone-impact-resistant coating for low-density aluminum substrate Download PDFInfo
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- CN112409854A CN112409854A CN202011280853.7A CN202011280853A CN112409854A CN 112409854 A CN112409854 A CN 112409854A CN 202011280853 A CN202011280853 A CN 202011280853A CN 112409854 A CN112409854 A CN 112409854A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
- C09D127/02—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D127/04—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C09D127/06—Homopolymers or copolymers of vinyl chloride
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- 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
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- 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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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Abstract
The invention discloses a stone impact resistant coating for a low-density aluminum substrate, which is prepared from the following raw materials in parts by weight: 15-25 parts of PVC paste resin, 5-15 parts of ternary vinyl chloride-vinyl acetate copolymer, 1-5 parts of adhesion promoting resin LTH, 1-5 parts of tackifying resin, 30-40 parts of plasticizer, 1-3 parts of moisture-proof agent, 3-8 parts of diluent, 0.1-1 part of carbon black, 1-5 parts of hollow glass beads and 20-30 parts of filler. The stone-impact-resistant coating can be baked and cured at 140 ℃ for 20min, compared with the common PVC type stone-impact-resistant coating, a cured product has good adhesive force with an aluminum substrate, and the baked density is 0.9-1.1 g/cm3Can effectively reduce the weight of the vehicle body, and is more than common PThe weight of the VC stone impact resistant coating is reduced by over 35 percent.
Description
Technical Field
The invention relates to an anti-stone-impact coating for automobiles, in particular to an anti-stone-impact coating for a low-density aluminum substrate.
Background
In the running process of the automobile, the underbody and wheel fenders and the like are often impacted and washed by silt, broken stones, sewage and the like, so that the underbody is easy to rust and loses the protection capability. Further, vibration of the engine and wheels during running of the automobile may cause resonance with the chassis at a certain frequency, which may cause an uncomfortable feeling, and thus it is necessary to apply a chassis anti-stone-impact paint to these portions. With the popularization of new energy automobiles in a large number, in order to reduce the weight of an automobile body, parts such as engine parts, a battery box shell, chassis parts and the like are mostly made of aluminum alloy materials. The traditional PVC stone-impact-resistant coating has poor adhesion to aluminum materials, is easy to fall off, and cannot meet the use requirements. Chinese patent CN107384052A prepares an aluminum plate type stone chip resistant coating, the purpose of increasing the adhesive force of an aluminum substrate is achieved by adding modified epoxy resin, but the viscosity of the epoxy resin is higher, the spraying property of the stone chip resistant coating is influenced by large addition amount, and the purpose of increasing the adhesive force is not achieved by small addition amount.
Disclosure of Invention
In order to overcome the defects of the stone impact resistant coating in the prior art, increase the adhesive force of the stone impact resistant coating to an aluminum substrate and further reduce the sprayed weight, the invention provides the stone impact resistant coating for the low-density aluminum substrate, the coating is cured at 140 ℃ for 20min, and a cured product has good adhesive force with the aluminum substrate, and has the advantages of low density, good spraying property, excellent vibration and noise reduction performance and the like.
The invention adopts the following specific technical scheme: a stone impact resistant coating for a low density aluminum substrate, characterized in that: the composite material is prepared from the following raw materials in parts by weight:
15-25 parts of PVC paste resin, 5-15 parts of ternary vinyl chloride-vinyl acetate copolymer, 1-5 parts of adhesion promoting resin LTH, 1-5 parts of tackifying resin, 30-40 parts of plasticizer, 1-3 parts of moisture-proof agent, 3-8 parts of diluent, 0.1-1 part of carbon black, 1-5 parts of hollow glass beads and 20-30 parts of filler.
The invention has the beneficial effects that: the stone-impact-resistant coating can be baked and cured at 140 ℃ for 20min, compared with the common PVC type stone-impact-resistant coating, a cured product has good adhesive force with an aluminum substrate, and the baked density is (0.9-1.1) g/cm3The weight of the car body can be effectively reduced by more than 35 percent compared with the weight of the common PVC type stone-impact-resistant coating.
The stone chip resistant coating has good adhesive force with an aluminum substrate, because the ternary vinyl chloride-vinyl acetate copolymer is added, the ternary vinyl chloride-vinyl acetate copolymer is modified by carboxyl or hydroxyl, contains free carboxyl or hydroxyl and can chemically react with aluminum; the adhesion promoting resin LTH is a polar polyester resin containing carboxyl produced by Degussa, and can obviously improve the adhesion of the coating to an aluminum substrate. The tackifying resin polyamide molecule contains long-chain aliphatic hydrocarbon group and has toughening effect, and the molecule also contains polar amide group and amine group. These polar groups produce good dative bonds with the aluminum substrate, thereby resulting in chemical adhesion.
The stone-impact-resistant coating has low density which is only (0.9-1.1) g/cm3The hollow glass beads are added, so that the density is reduced by more than 35% compared with that of the common PVC stone-impact-resistant coating, the quality of an automobile can be further reduced, and the stone impact resistance, the corrosion resistance and the like of the product are not influenced.
The stone impact resistant coating for the low-density aluminum base material can be applied to the positions of a new energy automobile aluminum or aluminum alloy battery shell bottom, a battery box body and the like, plays roles in vibration reduction, noise reduction, stone impact resistance and the like, and meets the light weight development of automobiles.
Detailed Description
The present invention will be described in further detail with reference to examples, but the formulation of the chipping resistant coating material for low density aluminum substrates according to the present invention is not limited to the examples.
The stone impact resistant coating for the low-density aluminum substrate comprises the following raw materials in parts by weight:
15-25 parts of PVC paste resin, 5-15 parts of ternary vinyl chloride-vinyl acetate copolymer, 1-5 parts of adhesion promoting resin LTH, 1-5 parts of tackifying resin, 30-40 parts of plasticizer, 1-3 parts of moisture-proof agent, 3-8 parts of diluent, 0.1-1 part of carbon black, 1-5 parts of hollow glass beads and 20-30 parts of filler.
Preferably, the ternary vinyl chloride-vinyl acetate-maleic anhydride ternary copolymer resin or the vinyl chloride-vinyl acetate-vinyl alcohol ternary copolymer resin is any one or the combination of two of the vinyl chloride-vinyl acetate-maleic anhydride ternary copolymer resin and the vinyl chloride-vinyl acetate-vinyl alcohol ternary copolymer resin.
Preferably, the tackifying resin is a polyamide resin.
Preferably, the plasticizer is any one or combination of dioctyl phthalate, diisononyl phthalate, diisodecyl phthalate, dioctyl adipate and dioctyl sebacate.
Preferably, the moisture barrier agent is calcium oxide.
Preferably, the diluent is odorless kerosene having a flash point of 80 ℃.
Preferably, the hollow glass beads are borosilicate rigid hollow spheres with a particle size of 35-55 μm and a density of 0.1-0.3 g/cm3。
Preferably, the filler is nano calcium carbonate.
The stone-impact resistant coating for the low-density aluminum substrate is produced by adopting the following process: weighing 15-25 parts of PVC paste resin, 5-15 parts of ternary vinyl chloride-vinyl acetate copolymer resin, 1-5 parts of adhesion promoting resin LTH, 1-5 parts of tackifying resin, 30-40 parts of plasticizer, 1-3 parts of moisture-proof agent, 3-8 parts of diluent and 0.1-1 part of carbon black according to the mass ratio, adding the mixture into a high-speed dispersion machine, uniformly stirring and dispersing at a high speed, adding 1-5 parts of hollow glass beads and 20-30 parts of filler, uniformly stirring, pumping the mixture into a curing tank, circulating and curing to obtain the stone-impact-resistant coating for the low-density aluminum base material.
Example 1
20 parts of PVC paste resin, 8 parts of chloroethylene-vinyl acetate-maleic anhydride terpolymer resin, 2 parts of adhesion promoting resin LTH, 1 part of polyamide resin, 32 parts of dioctyl phthalate, 2 parts of calcium oxide, 5 parts of odorless kerosene and 0.5 part of carbon black, adding the mixture into a high-speed dispersion machine, stirring at a high speed to disperse uniformly, adding 3.5 parts of hollow glass beads and 26 parts of nano calcium carbonate, stirring at a high speed to disperse uniformly, pumping the mixture into a curing tank to circulate and cure, and thus obtaining the low-density aluminum-based stone-impact-resistant coating. The coating is placed in an oven at 140 ℃ for 20 minutes and then cured, and after being cooled to room temperature and placed for 24 hours, performance test is carried out.
Example 2
15 parts of PVC paste resin, 12 parts of vinyl chloride-vinyl acetate-maleic anhydride terpolymer resin, 1 part of adhesion promoting resin LTH, 2 parts of polyamide resin, 35 parts of diisononyl phthalate, 1 part of calcium oxide, 8 parts of odorless kerosene and 0.1 part of carbon black are added into a high-speed dispersion machine and then uniformly stirred at a high speed, 5 parts of hollow glass beads and 21.9 parts of nano calcium carbonate are added and dispersed at a high speed, and after uniform stirring, the mixture is pumped into a curing tank to be circulated and cured, so that the low-density aluminum-based stone-impact-resistant coating is obtained. The coating is placed in an oven at 140 ℃ for 20 minutes and then cured, and after being cooled to room temperature and placed for 24 hours, performance test is carried out.
Example 3
25 parts of PVC paste resin, 5 parts of chloroethylene-vinyl acetate-maleic anhydride terpolymer resin, 2 parts of adhesion promoting resin LTH, 3 parts of polyamide resin, 32 parts of diisodecyl phthalate, 3 parts of calcium oxide, 3 parts of odorless kerosene and 1 part of carbon black are added into a high-speed dispersion machine, then uniformly stirred and dispersed at a high speed, then 1 part of hollow glass microsphere and 25 parts of nano calcium carbonate are added, uniformly stirred and dispersed at a high speed, pumped into a curing tank for circulation and curing, and finally the stone impact resistant coating for the low-density aluminum substrate is obtained. The coating is placed in an oven at 140 ℃ for 20 minutes and then cured, and after being cooled to room temperature and placed for 24 hours, performance test is carried out.
Example 4
22 parts of PVC paste resin, 7 parts of chloroethylene-vinyl acetate-vinyl alcohol ternary copolymer resin, 3 parts of adhesion promoting resin LTH, 2 parts of polyamide resin, 33 parts of dioctyl adipate, 1.5 parts of calcium oxide, 5.5 parts of odorless kerosene and 0.5 part of carbon black, adding the mixture into a high-speed dispersion machine, uniformly stirring and dispersing at a high speed, adding 2 parts of hollow glass beads and 23.5 parts of nano calcium carbonate, uniformly stirring, pumping the mixture into a curing tank, circulating and curing to obtain the stone-impact-resistant coating for the low-density aluminum substrate. The coating is placed in an oven at 140 ℃ for 20 minutes and then cured, and after being cooled to room temperature and placed for 24 hours, performance test is carried out.
Example 5
18 parts of PVC paste resin, 6 parts of vinyl chloride-vinyl acetate-vinyl alcohol ternary copolymer resin, 4 parts of adhesion promoting resin LTH, 1 part of polyamide resin, 33 parts of dioctyl sebacate, 1.5 parts of calcium oxide, 6 parts of odorless kerosene and 1 part of carbon black are added into a high-speed dispersion machine, then the mixture is uniformly stirred and dispersed at a high speed, 4 parts of hollow glass beads and 25.5 parts of nano calcium carbonate are added, and after the mixture is uniformly stirred and dispersed at a high speed, the mixture is pumped into a curing tank to be circulated and cured, so that the stone impact resistant coating for the low-density aluminum base material is obtained. The coating is placed in an oven at 140 ℃ for 20 minutes and then cured, and after being cooled to room temperature and placed for 24 hours, performance test is carried out.
The low density aluminum substrates of examples 1 through 5 were tested for stone chip resistance as shown in Table 1 below:
TABLE 1 Performance testing of chip resistant coatings for low density aluminum substrates
The test results of examples 1-5 show that the shear strength of the stone-impact resistant coating for low-density aluminum substrates is greater than 1MPa, the adhesion to the aluminum substrate is good, and the cohesive failure is 100%. Simultaneously the cured density is 0.9-1.06 g/cm3Compared with the conventional stone-impact-resistant coating, the weight of the coating can be reduced by 40%, the light weight of an automobile is facilitated, and the fuel consumption is reduced.
Claims (8)
1. The stone impact resistant coating for the low-density aluminum substrate is characterized by comprising the following raw materials in parts by weight:
15-25 parts of PVC paste resin
5-15 parts of ternary vinyl chloride-vinyl acetate copolymer
1-5 parts of adhesion promoting resin LTH
1-5 parts of tackifying resin
30-40 parts of plasticizer
1-3 parts of moisture-proof agent
3-8 parts of diluent
0.1-1 part of carbon black
1-5 parts of hollow glass beads
20-30 parts of a filler.
2. The chip resistant coating for low density aluminum substrates of claim 1 wherein: the ternary vinyl chloride-vinyl acetate copolymer resin is one or the combination of vinyl chloride-vinyl acetate-maleic anhydride ternary copolymer resin or vinyl chloride-vinyl acetate-vinyl alcohol ternary copolymer resin.
3. The chip resistant coating for low density aluminum substrates of claim 1 wherein: the tackifying resin is polyamide resin.
4. The chip resistant coating for low density aluminum substrates of claim 1 wherein: the plasticizer is any one or combination of more of dioctyl phthalate, diisononyl phthalate, diisodecyl phthalate, dioctyl adipate and dioctyl sebacate.
5. The chip resistant coating for low density aluminum substrates of claim 1 wherein: the moisture-proof agent is calcium oxide.
6. The chip resistant coating for low density aluminum substrates of claim 1 wherein: the diluent is odorless kerosene with a flash point of 80 ℃.
7. The chip resistant coating for low density aluminum substrates of claim 1 wherein: the hollow glass beads are rigid hollow spheres or particles made of borosilicate materialA diameter of 35 to 55 μm and a density of 0.1 to 0.3 g/cm3。
8. The chip resistant coating for low density aluminum substrates of claim 1 wherein: the filler is nano calcium carbonate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011280853.7A CN112409854A (en) | 2020-11-16 | 2020-11-16 | Stone-impact-resistant coating for low-density aluminum substrate |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011280853.7A CN112409854A (en) | 2020-11-16 | 2020-11-16 | Stone-impact-resistant coating for low-density aluminum substrate |
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| CN112409854A true CN112409854A (en) | 2021-02-26 |
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| CN202011280853.7A Pending CN112409854A (en) | 2020-11-16 | 2020-11-16 | Stone-impact-resistant coating for low-density aluminum substrate |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114437590A (en) * | 2021-12-31 | 2022-05-06 | 张家港爱科思汽车配件有限公司 | Mixed foaming type vehicle bottom stone-impact-resistant coating and preparation method thereof |
| CN116218295A (en) * | 2023-03-01 | 2023-06-06 | 博尔泰(上海)化工科技发展有限公司 | Low-density high-damping PVC (polyvinyl chloride) coating and preparation method thereof |
| CN116239918A (en) * | 2023-03-01 | 2023-06-09 | 博尔泰(上海)化工科技发展有限公司 | Scratch-coatable low-density high-strength expansion type paint and preparation method thereof |
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| CN107057481A (en) * | 2017-04-28 | 2017-08-18 | 雅拓莱焊接科技（惠州）有限公司 | A kind of peelable blue glue of heat cure |
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2020
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| CN101402772A (en) * | 2008-10-30 | 2009-04-08 | 匡建钢 | Low-temperature plasticizing type PVC plastic colloidal sols and method of producing the same |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114437590A (en) * | 2021-12-31 | 2022-05-06 | 张家港爱科思汽车配件有限公司 | Mixed foaming type vehicle bottom stone-impact-resistant coating and preparation method thereof |
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| CN116239918A (en) * | 2023-03-01 | 2023-06-09 | 博尔泰(上海)化工科技发展有限公司 | Scratch-coatable low-density high-strength expansion type paint and preparation method thereof |
| CN116218295B (en) * | 2023-03-01 | 2024-05-07 | 博尔泰(上海)化工科技发展有限公司 | Low-density high-damping PVC (polyvinyl chloride) coating and preparation method thereof |
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Application publication date: 20210226 |