Epoxy polyurethane gloss varnish

An epoxy polyurethane and clear topcoat technology, applied in the field of coatings, can solve the problems of poor weather resistance, restricted materials, and poor paint film fullness, and achieve the effect of improving gloss, maintaining excellent performance, and meeting the requirements of high gloss.

Pending Publication Date: 2020-06-12
福州展辰新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, epoxy resin coatings have the problem of poor fullness of the paint film, and the paint film is easy to pulverize and lose gloss outdoors, so it is not suitable for high decorative performance coatings
Although the gloss of traditional polyurethane and UV-cured glossy topcoats is better than that of epoxy resin coatings, they are still limited by the nature of the material itself, and the gloss has a bottleneck, usually ≤ 100° (60° angle), and then go up It is very difficult to improve
Although there are also researches on the use of polyurethane to modify epoxy resin for the preparation of coatings, such as the Chinese invention patent with application number 201710307969.7, which discloses a polyurethane modified epoxy resin and its preparation method and electrophoretic coating. The resin is modified to overcome the shortcomings of epoxy resin, such as poor weather resistance, poor fullness of the paint film, and easy chalking and loss of paint film outdoors, significantly improve the weather resistance and fullness of the paint film, and can be applied to outdoor coatings and high decorative performance coatings, but the glossiness (60° angle) of the final coating is only 85°

Method used

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  • Epoxy polyurethane gloss varnish
  • Epoxy polyurethane gloss varnish

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A kind of epoxy polyurethane gloss clear finish paint, comprises main agent, curing agent and diluent;

[0031] The main agent is made of the following components: 85kg of epoxy resin, 14.7kg of ethyl acetate, 0.2kg of defoamer and 0.1kg of leveling agent;

[0032] The curing agent is made of the following components: 50kg of toluene diisocyanate (TDI) adduct and 50kg of butyl acetate;

[0033] Described diluent is made of following components: the butyl acetate of 50kg and the propylene glycol methyl ether acetate of 50kg;

[0034] The epoxy resin is Miki SM601-75.

[0035] The preparation method of the above-mentioned epoxy polyurethane clear finish paint is as follows: add epoxy resin in a clean and pollution-free container, add ethyl acetate, defoamer, and leveling agent in turn under stirring conditions, and disperse evenly to obtain the main agent;

[0036] Stir and mix the main agent, curing agent and diluent according to the weight ratio of the main agent, cur...

Embodiment 2

[0038] A kind of epoxy polyurethane gloss clear finish paint, comprises main agent, curing agent and diluent;

[0039] The main agent is made of the following components: 88kg of epoxy resin, 11.7kg of ethyl acetate, 0.3kg of defoamer and 0.3kg of leveling agent;

[0040] The curing agent is made of the following components: 55kg of toluene diisocyanate (TDI) adduct and 45kg of butyl acetate;

[0041] Described diluent is made up of following components: the butyl acetate of 40kg and the propylene glycol methyl ether acetate of 60kg;

[0042] In the above-mentioned epoxy polyurethane clear finish paint, the weight ratio of main agent, curing agent and diluent is 1:0.55:0.35; the main agent curing agent and diluent are stirred and mixed according to the ratio to obtain the epoxy polyurethane clear finish paint;

[0043] The epoxy resin is a bisphenol A type epoxy resin with an epoxy value of 20.

Embodiment 3

[0045] A kind of epoxy polyurethane gloss clear finish paint, comprises main agent, curing agent and diluent;

[0046] The main agent is made of the following components: 90kg of epoxy resin, 9.3kg of ethyl acetate, 0.4kg of defoamer and 0.3kg of leveling agent;

[0047] The curing agent is made of the following components: 60kg of toluene diisocyanate (TDI) adduct and 40kg of butyl acetate;

[0048] Described diluent is made of following components: the butyl acetate of 60kg and the propylene glycol methyl ether acetate of 40kg;

[0049] In the above-mentioned epoxy polyurethane clear finish paint, the weight ratio of the main agent, curing agent and diluent is 1:0.6:0.25; the main agent curing agent and the diluent are stirred and mixed in proportion to obtain the epoxy polyurethane bright clear surface paint;

[0050] The epoxy resin is Miki SM601-75; the defoamer is BYK066N, and the leveling agent is Efka EFKA3600; the toluene diisocyanate (TDI) adduct curing agent is Baye...

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Abstract

The invention discloses an epoxy polyurethane glossy varnish, and belongs to the technical field of coatings. The epoxy polyurethane gloss varnish is composed of a main agent, a curing agent and a diluent in a weight ratio of 1: (0.5-0.6): (0.25-0.35). The main agent comprises bisphenol A epoxy resin with an epoxy value of 20, and the curing agent in the curing agent comprises a toluene diisocyanate adduct and butyl acetate. According to the epoxy polyurethane gloss varnish, the main agent, the curing agent and the diluent are added according to a proper ratio, the epoxy resin hydroxyl reactswith a polyurethane curing agent, a firm coating film with extremely high gloss of 104-106 degrees can be prepared, and the technical bottleneck that the gloss of the existing epoxy resin, polyurethane and ultraviolet curing varnish is relatively low and cannot break through 100 degrees is overcome, and thus the epoxy polyurethane varnish can be used as a coating with high decorative performance.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to an epoxy polyurethane clear finish paint. Background technique [0002] With the improvement of material and cultural living standards, people have higher and higher requirements for the aesthetics and decorative effects of home furniture. In order to strengthen their competitiveness, furniture manufacturers also urgently need to find differences from competitors and thus attract consumers. When it comes to glossy finishes, furniture manufacturers want as high a gloss as possible. Epoxy resin coatings have the characteristics of strong adhesion, chemical resistance, corrosion resistance, water resistance, thermal stability and electrical insulation, and are widely used in construction and decoration industries. However, epoxy resin coatings have the problems of poor fullness of the paint film, and the paint film is easy to pulverize and lose gloss outdoors, so it is...

Claims

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Application Information

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IPC IPC(8): C09D175/04C08G18/58C08G18/76
CPCC08G18/58C08G18/7614C09D175/04
Inventor 龚旭孔令飞
Owner 福州展辰新材料有限公司
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