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Powder coating used on automotive aluminium wheels and suitable for balance weights to bond and preparation method thereof

A technology of powder coating and balance weight, applied in powder coatings, polyester coatings, epoxy resin coatings, etc., can solve the problems of poor adhesion of balance weights, unfavorable industrial application, and insufficient temperature transfer, so as to improve adhesion, improve The effect of sticking performance, simple preparation method

Active Publication Date: 2015-11-11
GUANGZHOU KINTE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN104356848A discloses a kind of automobile powder coating, by weight parts, by 45-50 parts of phenolic resin, 1-2 parts of epoxy resin, 15-25 parts of acrylic zinc resin, 20-25 parts of titanium dioxide, 3-6 parts Part of chrome yellow, 5-10 parts of silicone, 0.3-0.6 part of dibutyltin dilaurate, 2-3 parts of curing agent, 0.5-1 part of stabilizer and 2-2.5 parts of leveling agent; the prepared by the invention The coating has good toughness and high temperature resistance, but it limits the fineness of the powder coating to a narrow range, which is not conducive to industrial application
[0004] The above-mentioned powder coatings can improve the performance of the coating under certain conditions, but for the coating formed on the aluminum wheel hub of a large heat capacity automobile, there may be problems such as insufficient temperature transfer, poor leveling of the coating, and poor adhesion to the balance weight.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Carboxyl saturated polyester resin, which is prepared by melt polymerization of the following monomer components in parts by weight:

[0040] Terephthalic acid 30-50

[0041] Dimethyl terephthalate 30-50

[0042] Neopentyl Glycol 10-30

[0043] 1,6-Hexanediol 5-15

[0044] Trimethylolethane 1-5

[0045] Trimethylolpropane 3-5

[0046] Acidolysis agent 0-1;

[0047] The preparation method of described carboxyl saturated polyester resin, comprises the following steps:

[0048] 1) In the reaction kettle, add neopentyl glycol, 1,6-hexanediol, trimethylolethane, trimethylolpropane and water, and heat to melt;

[0049] 2) Add terephthalic acid and dimethyl terephthalate in sequence, and continue to heat up to 130°C with nitrogen;

[0050] 3) The temperature is heated from 130°C to 250°C until the acid value reaches 14-16mgKOH / g, and the first time vacuumizes for polycondensation reaction, the acid value reaches 4-6mgKOH / g, the softening point is 100-105°C and the melt ...

Embodiment 2

[0052] A kind of automobile aluminum wheel hub powder coating suitable for balance weight bonding, prepared from the following components by weight:

[0053] Carboxyl saturated polyester resin 30 parts

[0054] 70 parts of bisphenol A type epoxy resin

[0055] 0.5 parts of polyvinylpyrrolidone

[0056] 8 parts of mono-salt type matting curing agent

[0057] Auxiliary 5 parts

[0058] 15 parts of magnesium oxide;

[0059] The bisphenol A epoxy resin is bisphenol A epoxy resin modified by phenolic resin, the epoxy equivalent is 700-850g / eq, and the softening point is 65-80°C;

[0060] The polyvinylpyrrolidone has a molecular weight of 10000-15000;

[0061] The auxiliary agent is white carbon black, polyvinyl alcohol and methyl hydroxyethyl cellulose ether, and its weight ratio is 5:2:1;

[0062] According to the above-mentioned powder coating ratio, make the following preparation:

[0063] (1) Mix fillers and additives evenly, grind at 150-200°C for 0.5-1 hour, discharge an...

Embodiment 3

[0070] A kind of automobile aluminum wheel hub powder coating suitable for balance weight bonding, prepared from the following components by weight:

[0071] Carboxyl saturated polyester resin 40 parts

[0072] 60 parts of bisphenol A type epoxy resin

[0073] 1.5 parts of polyvinylpyrrolidone

[0074] 2 parts of mono-salt type matting curing agent

[0075] Auxiliary 7 parts

[0076] Silicon carbide 25 parts

[0077] 1 part of pigment;

[0078] The bisphenol A epoxy resin is bisphenol A epoxy resin modified by phenolic resin, the epoxy equivalent is 700-850g / eq, and the softening point is 65-80°C;

[0079] The polyvinylpyrrolidone has a molecular weight of 10000-15000;

[0080] The auxiliary agent is white carbon black, polyvinyl alcohol and methyl hydroxyethyl cellulose ether, and its weight ratio is 6:2:1;

[0081] According to the above-mentioned powder coating ratio, make the following preparation:

[0082] (1) Mix fillers and additives evenly, grind at 150-200°C f...

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Abstract

The invention discloses a powder coating used on automotive aluminium wheels and a preparation method thereof. The powder coating comprises the following components in parts by weight: 30-45 parts of carboxyl saturated polyester resin, 40-70 parts of bisphenol A epoxy resin, 0.5-2 parts of surfactant, 0-8 parts of single salt flatting curing agent, 5-10 parts of additives, 15-40 parts of fillers and 0-3 parts of pigments. The prepared powder coating used on automotive aluminium wheels has good breathability and excellent levelling property and balance weight bonding property.

Description

technical field [0001] The invention relates to a paint, in particular to an automobile aluminum wheel hub powder paint suitable for bonding balance weights and a preparation method thereof. Background technique [0002] With the development of the automobile industry, the performance requirements of automobiles are also getting higher and higher. Due to its good environmental protection and excellent corrosion resistance, powder coatings have gradually developed rapidly in the auto parts industry, especially in the application of automotive aluminum wheels. Powder coating is a new type of solvent-free 100% solid powder coating. It has the characteristics of no solvent, no pollution, recyclable, environmental protection, saving energy and resources, reducing labor intensity and high mechanical strength of the coating film. In recent years, more and more powder coatings are used on the exterior of automobile aluminum wheels, but the existing powder coatings all have the pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/04C09D167/02C09D7/12C09D5/03C08G63/91C08G63/20B29C47/92B29C48/92
Inventor 高庆福程里李光张捷胡百九
Owner GUANGZHOU KINTE IND
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