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Stone-impact-resistant coating for low-density aluminum substrate

An aluminum substrate, anti-stone chip technology, applied in polyester coatings, polyamide coatings, coatings, etc., can solve the problems of not being able to meet the use requirements, easy to fall off, increase adhesion, etc., to meet the requirements of lightweight development, reduce The effect of vehicle weight and good adhesion

Inactive Publication Date: 2021-02-26
三友(天津)高分子技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional PVC anti-stone chip coating has poor adhesion to aluminum and is easy to fall off, which cannot meet the requirements of use
Chinese patent CN107384052A has prepared an aluminum plate type anti-stone chip coating. Adding modified epoxy resin has achieved the purpose of increasing the adhesion of the aluminum substrate, but the viscosity of the epoxy resin is high, and the amount added will greatly affect the sprayability of the anti-stone chip coating. , the amount added is small and the purpose of increasing adhesion cannot be achieved

Method used

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  • Stone-impact-resistant coating for low-density aluminum substrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 20 parts of PVC paste resin, 8 parts of vinyl chloride-vinyl acetate-maleic anhydride ternary copolymer 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, 0.5 parts of carbon black, add to the high-speed disperser and stir at high speed to disperse evenly, then add 3.5 parts of hollow glass microspheres, 26 parts of nano-calcium carbonate and stir at high speed to disperse, stir evenly, pump the material to the aging tank for circulation , aging, that is, to obtain stone chipping-resistant coatings for low-density aluminum substrates. The coating was cured after being placed in an oven at 140°C for 20 minutes, and performance tests were performed after cooling to room temperature for 24 hours.

Embodiment 2

[0024] 15 parts of PVC paste resin, 12 parts of vinyl chloride-vinyl acetate-maleic anhydride ternary copolymer 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 to the high-speed disperser and stirred at high speed to disperse evenly, then 5 parts of hollow glass microspheres and 21.9 parts of nano-calcium carbonate are added to disperse at high speed, stirred evenly, and then pumped into the aging tank for circulation. After aging, the anti-stone chip coating for low-density aluminum substrates can be obtained. The coating was cured after being placed in an oven at 140°C for 20 minutes, and performance tests were performed after cooling to room temperature for 24 hours.

Embodiment 3

[0026] 25 parts of PVC paste resin, 5 parts of vinyl chloride-vinyl acetate-maleic anhydride ternary copolymer resin, 2 parts of adhesion promoting resin LTH, 3 parts of polyamide resin, 32 parts of diisodecyl phthalate, 3 parts of calcium oxide 1 part, 3 parts of odorless kerosene, 1 part of carbon black, add to the high-speed disperser and stir at high speed to disperse evenly, then add 1 part of hollow glass microspheres, 25 parts of nano-calcium carbonate and stir at high speed to disperse, stir evenly and pump the materials into the aging tank Circulation and aging can obtain stone chip-resistant coatings for low-density aluminum substrates. The coating was cured after being placed in an oven at 140°C for 20 minutes, and performance tests were performed after cooling to room temperature for 24 hours.

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Abstract

The invention discloses a stone-impact-resistant coating for a low-density aluminum substrate. The stone-impact-resistant coating is prepared from the following raw materials in parts by weight: 15-25parts of PVC paste resin, 5-15 parts of ternary vinyl chloride-vinyl acetate resin, 1-5 parts of adhesion promoting resin LTH, 1-5 parts of tackifying resin, 30-40 parts of plasticizer, 1-3 parts ofmoisture-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 DEGC for 20 min, compared with a common PVC type stone-impact-resistant coating, the stone-impact-resistant coating has the advantages that a cured product and an aluminum base material have good adhesive force, the density after baking is 0.9-1.1 g / cm<3>, the weight of a vehicle body can be effectively reduced, and the weight is reduced by 35% or above compared with that of the common PVC type stone-impact-resistant coating.

Description

technical field [0001] The invention relates to an anti-stone chip coating for automobiles, in particular to an anti-stone chip coating for low-density aluminum substrates. Background technique [0002] When the car is running, the bottom of the car and the fenders of the wheels are often impacted and washed by sand, gravel and sewage, which makes the bottom of the car easily corroded and loses its protection. In addition, the vibration of the engine and wheels when the car is running will resonate with the chassis at a certain frequency, which will make people feel uncomfortable. Therefore, it is necessary to spray the anti-stone impact coating on these parts of the chassis. With the mass promotion of new energy vehicles, in order to reduce the weight of the body, some parts such as engine parts, battery box shells and chassis parts are mostly made of aluminum alloy. The traditional PVC anti-stone chip coating has poor adhesion to aluminum and is easy to fall off, which ca...

Claims

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Application Information

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IPC IPC(8): C09D127/06C09D167/00C09D177/00C09D7/61C09D7/65
CPCC08L2205/025C08L2205/035C09D127/06C09D7/61C09D7/65C09D7/70C08L27/06C08L67/00C08L77/00C08K13/04C08K7/28
Inventor 吴子刚高之香李建武万福荣陈力李世春陈雨
Owner 三友(天津)高分子技术有限公司
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