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Ground powder paint for aluminium wheel hub of cars

An aluminum wheel and primer technology, applied in powder coatings, epoxy resin coatings, coatings, etc., can solve the problems of high price and poor leveling, and achieve the effect of low production cost and high leveling.

Inactive Publication Date: 2006-04-19
GUANGZHOU QINGTIAN INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, with the rapid development of the domestic automobile industry, more and more powder coatings are used for auto parts. Among them, powder coating for aluminum wheels of automobiles is also widely used in the world. Because most of the primer coatings used on aluminum wheels of automobiles in my country rely on imports, These base powder coatings have problems such as poor leveling and high prices. In this way, in the process of spraying aluminum wheel hubs of automobiles, a fine grinding process must be added before the color paint can be sprayed.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The automobile aluminum wheel base powder coating of the present invention, its component and weight ratio are:

[0016] 30 parts of carboxyl polyester with an acid value of 30-60mgKOH / kg

[0017] 100 parts of epoxy resin with an epoxy equivalent of 600-750g / eq

[0018] Cyclic amidine and polybasic acid salt matting curing agent 8 parts

[0019] 1 part benzoin

[0020] Barium sulfate 10 parts

[0021] Titanium dioxide 20 parts

[0022] Acrylic copolymer leveling agent 1.5 parts

[0023] Preparation process: First, pre-mix each component according to the proportion, wherein the pre-mixing time is 200 seconds, and the dispersion speed is 1000 rpm; then kneading and extruding at a temperature of 100°C; finally crushing and sieving. The coating is baked and cured at 180°C / 10mins.

Embodiment 2

[0025] The automobile aluminum wheel base powder coating of the present invention, its component and weight ratio are:

[0026] 60 parts of carboxyl polyester with an acid value of 30-60mgKOH / kg

[0027] 40 parts of epoxy resin with an epoxy equivalent of 600-750g / eq

[0028] Cyclic amidine and polybasic acid salt matting curing agent 0 parts

[0029] Benzoin 0.6 parts

[0030] Barium sulfate 50 parts

[0031] Titanium dioxide 0 parts

[0032] Acrylic copolymer leveling agent 0.8 parts

[0033] Preparation process: First, pre-mix the components according to the proportion, and the pre-mixing time is 250 seconds, and the dispersion speed is 800 rpm; then kneading and extruding at a temperature of 110 ° C; finally crushing and sieving. The coating is baked and cured at 180°C / 10mins.

Embodiment 3

[0035] The automobile aluminum wheel base powder coating of the present invention, its component and weight ratio are:

[0036] 50 parts of carboxyl polyester with an acid value of 30-60mgKOH / kg

[0037] 80 parts of epoxy resin with an epoxy equivalent of 600-750g / eq

[0038] Cyclic amidine and polybasic acid salt matting curing agent 5 parts

[0039] Benzoin 0.8 parts

[0040] Barium sulfate 30 parts

[0041] Titanium dioxide 10 parts

[0042] Acrylic copolymer leveling agent 1.2 parts

[0043] Preparation process: First, pre-mix each component according to the proportion, and the pre-mixing time is 230 seconds, and the dispersion speed is 900 rpm; then kneading and extruding at a temperature of 110°C; finally crushing and sieving. The coating is baked and cured at 180°C / 10mins.

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Abstract

A priming paint for the aluminium hub of car is prepared proportionally from carboxypolyester, epoxy resin, dulling-solidifying agent (cycloamidine and polyprotic acid), borneol, barium sulfate, titanium white powder, and acrylic acid copolymer as leveling agent.

Description

technical field [0001] The invention relates to a chemical powder coating, in particular to a powder coating for the bottom of an aluminum wheel hub of an automobile. Background technique [0002] Due to the energy-saving and VOC-free performance of powder coatings, domestic powder coating technology has developed rapidly in recent years. At present, with the rapid development of the domestic automobile industry, more and more powder coatings are used for auto parts. Among them, powder coating for aluminum wheels of automobiles is also widely used in the world. Because most of the primer coatings used on aluminum wheels of automobiles in my country rely on imports, These base powder coatings have problems such as poor leveling and high price. In this way, in the process of spraying aluminum wheel hubs of automobiles, a fine grinding process must be added before the color paint can be sprayed. As the requirements of customers are getting higher and higher, the requirements fo...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D5/03B60C27/00
Inventor 高庆福何达荣程里
Owner GUANGZHOU QINGTIAN INDAL
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