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Aqueous coating for automobile plastic part

A technology of water-based paint and plastic parts, applied in the direction of coating, etc., can solve the problems of environmental impact of waste, damage of plastic film parts, increased cost, etc., and achieve the effects of reducing pretreatment steps, protecting the environment, and good acid and alkali resistance

Active Publication Date: 2018-09-21
HEBEI CHENYANG INDAL & TRADE GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of acid treatment, flame treatment, surfactant treatment, hot solvent treatment, ultraviolet treatment and plasma treatment will not only increase the cost, but also damage the plastic film to a certain extent.
[0004] At present, the pretreatment steps of automotive plastic parts before painting are complicated, and generally require unconventional pretreatment. Careless unconventional pretreatment operations will cause damage to the parts, and the discharged waste will have a negative impact on the environment.

Method used

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  • Aqueous coating for automobile plastic part
  • Aqueous coating for automobile plastic part
  • Aqueous coating for automobile plastic part

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment

[0024]

[0025]

[0026] The first resin is polyacrylic acid dispersion containing hydroxyl functional groups, high solid content and high molecular weight (about 830g / mol), solid content 40 ± 2%, pH value 8 ± 0.5, add 15-25 parts of water to dilute , mixed with aliphatic polyisocyanate, can prepare room temperature drying or 80 ℃ forced drying high-gloss topcoat, the cured paint film is tough, and the single-coat adhesion is good, and has good water resistance and solvent resistance. The second resin is a hydroxyl polyacrylic acid dispersion, the solid content is about 42%, the hydroxyl content is about 2%, and the pH value is 7.7±0.5. The rheological additive is organically modified montmorillonite clay Similar rheological additives, density 1.73 (g / cm3), model B38, purchased from Xiamen Kangdilong Trading Co., Ltd. The film-forming aid is one or both of dipropylene glycol methyl ether or dipropylene glycol monobutyl ether. The anti-flash rust agent, model YF-1207, is...

Embodiment 5

[0028] Embodiment 5 coating is in the following table 1 in each plastic substrate surface mechanical performance test result:

[0029] Table 1

[0030]

[0031]

[0032] Product detection performance is as follows table 2 (embodiment 5):

[0033] Table 2

[0034]

[0035] It can be seen from Table 1 that the coating has good adhesion to ABS, PP, and PC, and has good hardness, and the wear resistance can also meet the standard, which can meet the performance requirements of the surface coating of plastic materials. Select PP material surface coating to do further performance test, table 2 is water-based polyurethane coating of the present invention coated on PP material and other performance index inspection results, as can be seen from the table has high storage stability, coating surface gloss It has good performance of water boiling resistance and chemical corrosion resistance. It can provide good protection for automotive plastic parts and meet the requirements o...

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Abstract

The invention discloses an aqueous coating for an automobile plastic part. The aqueous coating comprises the following components in parts by weight: 50-70 parts of an aqueous polyacrylic acid dispersant, 2-4 parts of a dispersant, 3-5 parts of a leveling agent, 0.5-1 part of a defoaming agent, 3-5 parts of filming aids, 5-8 parts of nano titania, 15-20 parts of coarse whiting, 5-8 parts of precipitated barium sulphate of 1500 meshes, 0.1-0.3 part of rheologic aids, 1-3 parts of a water-soluble titanate coupling agent, 1-3 parts of a flash-rust inhibitor, 0.5-1 part of a thickening agent, 70-90 parts of an isocyanate curing agent and 15-25 parts of a solvent. Th invention further discloses a preparation method of the aqueous coating. The aqueous coating disclosed by the invention is a sealed polyurethane coating which can be applied to a plastic part after common pretreatment, and a coating layer is high in acid-alkali resistance, corrosion resistance and tension strength and excellentin adhesion property.

Description

technical field [0001] The invention relates to the technical field of water-based industrial coatings, in particular to a water-based coating used for automotive plastic parts. Background technique [0002] In recent years, my country's automobile industry has developed rapidly, a large amount of automobile exhaust is discharged into the atmosphere, and the environmental situation is deteriorating. This also makes people put forward higher requirements for the appearance, safety, energy saving and environmental protection of automobiles. The use of lightweight plastic materials can not only reduce the quality of the car, save energy, and make the car safer and more comfortable. It is also more resistant to atmospheric corrosion and gasoline than metal, and is easy to process and shape to reduce production costs. Therefore, it has been more and more widely used. usage of. [0003] Although the application of plastic parts has many advantages, the plastic parts themselves al...

Claims

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Application Information

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IPC IPC(8): C09D133/00C09D7/65C09D7/61
CPCC09D7/65C09D133/00C09D7/61C08L2205/025C08K2003/2241C08K2003/3045C08K2003/265C08L33/00C08K13/02C08K3/22C08K3/30C08K3/26
Inventor 马利纳胡中源董立志程璐
Owner HEBEI CHENYANG INDAL & TRADE GROUP CO LTD
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