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A pe bright white finish

A white finish, bright technology, applied in polyester coatings, coatings, etc., can solve problems such as affecting the feel and scratch resistance of the paint film, greening of PE paint, coarse grains, etc.

Inactive Publication Date: 2011-12-21
SHANGHAI CHANGRUNFA PAINT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. When the PE paint is used as a white finish paint, the dispersibility of the pigment titanium dioxide added in the PE paint is poor, and because the unsaturated resin in the PE paint will self-polymerize at high temperature, it will cause the pigment titanium dioxide to be dispersed after dispersion. , it is easy to reunite and return to coarse, so that the surface of the paint film is not smooth, there are coarse grains, and stratification will occur;
[0005] 2. Usually, the oxidation-reduction action of initiators and accelerators in PE paint will generate a large number of free radicals to initiate the addition of double bonds in unsaturated resins, and the oxygen in the air will consume a large number of free radicals, making the paint film The surface layer is not dry, affecting the feel and scratch resistance of the paint film;
[0006] 3. Since cobalt isooctanoate, which is usually used as an accelerator in PE paint, is a non-ferrous metal salt, it will cause PE paint to turn green
Therefore, the green change problem also hinders the further development of PE white topcoat to a certain extent.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A PE bright white topcoat, including 48% unsaturated polyester, 13.5% epoxy-modified acrylate, 28% rutile titanium dioxide.

[0023] The PE bright white finish paint of the present invention solves the dispersion and grinding problems of titanium dioxide by adding epoxy-modified acrylate therein, wherein 13.5% epoxy-modified acrylate is preferred. Epoxy-modified acrylate contains double bonds, which can initiate polymerization through initiators and accelerators; and its thermal stability is very good, and it will not self-polymerize at high temperatures. It can be used as a grinding resin to solve the dispersion of titanium dioxide. and grinding issues.

[0024] Simultaneously, added 48% unsaturated polyester in the present embodiment. Preferably, an air-drying monomer is added to the unsaturated polyester during the synthesis process and introduced into the polyester linear molecular chain of the unsaturated polyester. Therefore, the drawbacks of slow drying or stic...

Embodiment 2

[0028] A PE bright white finish, including 40% unsaturated polyester, 15.75% epoxy-modified acrylate, 29.25% rutile titanium dioxide, 1% wetting and dispersing agent, 2% silicone defoamer, 1% silicone leveling agent and 6.5% styrene.

[0029] In this example, 2% silicone defoamer and 1% silicone leveling agent were added. The defoaming agent can not only eliminate the air bubbles generated during the paint mixing and prevent fish eyes and pinholes caused by the air bubbles, but also will not cause surface "fogging" and shrinkage; the leveling agent can prevent the PE paint from being The increase of paint viscosity hinders the discharge of gas and causes orange peel and shrinkage. At the same time, it can change the fluidity of the paint, ensure the uniform surface tension of the paint film, improve the anti-shrinkage ability, and make the paint film smooth, free of shrinkage, depression, Surface defects such as orange peel, while not affecting the interlayer adhesion. In th...

Embodiment 3

[0032] A PE bright white finish, including 44% unsaturated polyester, 17% epoxy-modified acrylate, 28% rutile titanium dioxide, 2% wetting and dispersing agent, 1% silicone defoamer , 1% silicone leveling agent and 7% styrene composition and initiator, accelerator and diluent. Composition: weight ratio of initiator: accelerator: diluent=100:0.6:3:50. Among them, cobalt isooctanoate is selected as the initiator, and the metal cobalt content in the initiator is 4%; ethyl ketone peroxide is selected as the accelerator.

[0033] In this embodiment, the accelerator in the PE bright white finish paint is preferably cobalt isooctanoate, and the initiator is preferably ethyl ketone peroxide. Of course, in other embodiments, other reagents can also be selected as accelerator and initiator. The embodiment does not limit this.

[0034] When cobalt isooctanoate is used as the accelerator, since cobalt isooctanoate is a non-ferrous metal salt, it will affect the color of PE paint to a ce...

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Abstract

The invention discloses a PE bright white finish paint, which comprises 40%-48% of unsaturated polyester, 13.5%-18% of epoxy-modified acrylate, and 28%-30.5% of rutile titanium dioxide. The PE bright white finish paint of the present invention has the advantages of good weather resistance, high hardness, high fullness and fast curing, and can effectively solve the problems of greening, poor air-drying property and poor dispersibility of titanium dioxide.

Description

technical field [0001] The invention relates to the field of chemical coatings, in particular to a PE bright white finish paint. Background technique [0002] Generally, polyurethane (PU) paint is mostly used when making bright white surfaces. PU paint has high brightness and good whiteness, but has poor weather resistance, low hardness, and contains more gases harmful to human body. When producing some furniture with high requirements on weather resistance and hardness, the use of PU paint often fails to meet customer requirements; at the same time, PU paint with poor weather resistance and low hardness will also affect the production efficiency of manufacturers to a certain extent , especially in winter, the increase in the hardness of PU paint will largely restrict the production efficiency of furniture manufacturers. Compared with PU paint, unsaturated polyester (PE) paint has tough and plump paint film, good weather resistance, high hardness, fast curing and low odor,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/06C09D133/00C09D7/12
Inventor 孙伟
Owner SHANGHAI CHANGRUNFA PAINT
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