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Yellowing-free polyurethane matte varnish

A polyurethane varnish, polyurethane technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of poor matting, slow drying, high curing agent price, and achieve strong adhesion, fast drying, and good fullness.

Inactive Publication Date: 2015-02-18
上海展辰涂料有限公司 +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are disadvantages such as slow drying, high price of curing agent, poor matting performance, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A non-yellowing polyurethane matte varnish, comprising a main paint agent, a curing agent and a thinner. The main ingredients of the paint are as follows: 65 kg of soybean oil modified alkyd resin, 15 kg of butyl acetate, 12 kg of propylene glycol methyl ether acetate, 0.3 kg of defoamer, 0.3 kg of leveling agent, 0.5 kg of anti-settling agent, 0.5 kg of anti-yellowing auxiliary agent, 6.4 kg of matting powder, 100 kg. The materials for the curing agent are as follows: 32.0 kg of toluene diisocyanate (TDI) trimer, 32.0 kg of toluene diisocyanate (TDI)-trimethylolpropane adduct, 36.0 kg of butyl acetate, yielding 100 kg. The diluent was taken as follows: 55.0 kilograms of butyl acetate, 20.0 kilograms of dimethyl carbonate, 10.0 kilograms of propylene glycol methyl ether acetate, 15.0 kilograms of xylene, and 100 kilograms were obtained. Construction weight ratio: main agent: curing agent: thinner = 1: 0.5: 0.5. Construction method: spraying.

[0025] According to GB / ...

Embodiment 2

[0048] A non-yellowing polyurethane matte varnish, comprising a main paint agent, a curing agent and a thinner. The main ingredients of the paint are as follows: 80 kg of soybean oil modified alkyd resin, 5 kg of butyl acetate, 10 kg of propylene glycol methyl ether acetate, 0.1 kg of defoamer, 0.2 kg of leveling agent, 0.1 kg of anti-settling agent, Anti-yellowing agent 1 kg, matting powder 3.6 kg. The materials for the curing agent are as follows: 32.0 kg of toluene diisocyanate (TDI) trimer, 32.0 kg of toluene diisocyanate (TDI)-trimethylolpropane adduct, and 36.0 kg of butyl acetate. The diluent retrieving material is: 40.0 kilograms of butyl acetate, 20.0 kilograms of dimethyl carbonate, 25.0 kilograms of propylene glycol methyl ether acetate, 15.0 kilograms of xylene. Construction weight ratio: main agent: curing agent: thinner = 1: 0.5: 0.8. Construction method: spraying.

[0049] According to GB / T 23997-2009 "Solvent-based Polyurethane Wood Coatings for Interior Dec...

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Abstract

The invention relates to yellowing-free polyurethane matte varnish. The yellowing-free polyurethane matte varnish is characterized in that a host of the yellowing-free polyurethane matte varnish comprises soybean oil modified alkyd resin, mixture of butyl acetate and propylene glycol monomethyl ether acetate, a defoaming agent, a levelling agent, an anti-settling agent, extinction powder and an anti-yellowing auxiliary, a curing agent comprises toluene diisocynate (TDI) tripolymer, a toluene diisocynate (TDI)-trimethylolpropane addition product and butyl acetate, and a diluent comprises butyl acetate, dimethyl carbonate, propylene glycol monomethyl ether acetate and dimethylbenzene. By adopting the technical scheme, the yellowing-free polyurethane matte varnish has the beneficial effects that the yellowing-free polyurethane matte varnish is applied to surface finishing of woodware; spraying mode is adopted during coating, the yellowing-free polyurethane matte varnish has the characteristics of high hardness, good fullness, strong adhesion and no formation of bubbles and pinholes and has the prominent characteristics that drying speed is high, especially low-temperature drying performance is good, cost is low, matting property is good and transparency is excellent as compared with the yellowing-free polyurethane matte varnish used in the current market.

Description

technical field [0001] The invention relates to a non-yellowing polyurethane matte varnish used for surface coating of wooden products. Background technique [0002] Now the non-yellowing polyurethane matte varnishes coated on the surface of wooden products all use curing agents such as alkyd resins with good yellowing resistance and hexamethylene diisocyanate prepolymers with excellent yellowing resistance. It has the advantages of good fullness, excellent adhesion, and good flexibility. For example, the application number is 201110177967, the application date is June 28, 2011, and the invention name is a low-odor, non-yellowing polyurethane-based matte varnish application for wood, which is characterized in that the paint is made of yellowing resistance. A good oleic acid alkyd resin plus an environmentally friendly solvent is formulated into a matte varnish as component A, and n-butyl acetate, OK.D.S and HX-90B are formulated into component B, with n-butyl acetate and di...

Claims

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Application Information

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IPC IPC(8): C09D175/14C09D175/06C09D7/12
CPCC09D175/14C08L2201/10C08L2205/035C09D7/20C09D7/65C09D175/06C08L101/00C08L83/04C08L83/12C08L77/00C08L67/04
Inventor 刘锋周琼辉刘志刚
Owner 上海展辰涂料有限公司
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