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Base coating composition for non-ferrous metal

A base paint and composition technology, applied in the direction of polyester paint, coating, etc., can solve the problems of reducing corrosion resistance, chipping resistance, hardness, repaintability, yellowing, non-softness, etc., and achieve excellent The effect of initial adhesion

Active Publication Date: 2017-01-04
KCC CORP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Both coating systems have problems with powder primer, interlayer adhesion and recoatability. The acrylic / melamine or acrylic / urethane type varnish (clear) or colored paint used in the past is not soft , can cause intercoat adhesion, reduced recoatability, or cause yellowing
In addition, Japanese Laid-Open Patent Publication No. 1991-162468 discloses a copolyester resin cross-linked into polyisocyanate and directly used for alloy wheels on aluminum alloy casting wheels. However, it is used for When used in a 2-component type 1-coat system, the physical properties required for wheels, such as corrosion resistance, chipping resistance, hardness, and recoatability, will decrease

Method used

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  • Base coating composition for non-ferrous metal
  • Base coating composition for non-ferrous metal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] After implementing the powder primer pretreatment on the aluminum substrate, the coating compositions of Examples 1-4 and Comparative Examples 1-2 having the composition of the following Table 1 are coated as liquid varnish samples and powder varnish samples , to evaluate the physical properties of the coatings.

[0031] For the pretreatment of the powder primer, electrostatic coating is used to make the coating thickness 80-120 microns, and the curing is carried out at a curing temperature of 170°C for 10 minutes. For liquid varnish samples, apply After using air spraying or electrostatic spraying to coat 20-35 microns on the substrate, after a setting time of 10 minutes at room temperature, use the same coating method as the substrate to coat the liquid varnish, set After 10 minutes it was cured at about 140°C for 10 minutes. For the powder varnish sample, after the 20-35 micron coating is carried out by air spraying or electrostatic spraying on the substrate that ...

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Abstract

The invention relates to a base coating composition for non-ferrous metal, which can exhibit excellent initial stage adhesion, interlayer adhesion, recoating performance and scratch resistance in the coating of non-ferrous metal by containing polyester polyhydric alcohol resin, acrylic acid polyhydric alcohol resin, melamine resin, epoxy resin and the balance of a solvent, and a coating object.

Description

technical field [0001] The invention relates to a primer composition for coating non-ferrous metals and coated articles. Background technique [0002] Substrates of non-ferrous metals such as aluminum The adhesion to paint is not good, and its use conditions are harsh, so the paint used is required to have excellent physical properties. Therefore, in the case of automobile wheels, two major types of coating systems are generally formed. The first is to apply a powder primer once on an aluminum wheel that has undergone pretreatment such as acid treatment, and then apply a 1-time coating system. After the first liquid base (liquid base), the coating system of wet on wet (wet on wet) liquid varnish is applied once, and the second is applied on aluminum wheels that have undergone pretreatment such as acid treatment. A coating system in which a powder primer is applied once, a liquid primer is applied once, diamond cutting is applied, and a powder clear coat is applied once. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/00C09D133/00C09D7/12
CPCC08L2205/025C08L2205/035C09D7/65C09D167/00C08L33/00C08L63/00C08L91/06C08L23/06C08L67/00
Inventor 黄东准奉志勋白在洪郑容旭朴永熙
Owner KCC CORP CO LTD
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