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A kind of high solid content two-component polyurethane environmental protection coating and preparation method thereof

A two-component polyurethane, high-solid technology, used in polyurea/polyurethane coatings, anti-corrosion coatings, coatings, etc., to achieve the effects of fast solvent evaporation, fast drying and excellent adhesion

Active Publication Date: 2019-10-18
UNION FOSHAN CHEM +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The above-mentioned Chinese patents CN103666229A, CN105419599A, CN104073141A high-solid two-component polyurethane coating main agent is hydroxyl acrylic resin, polyester resin, aldehyde resin; although alkyd resin is useful in the main agent of Chinese patent CN105378001A, the solid content is on the low side < 65% , strictly speaking, it is not a high solids coating

Method used

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  • A kind of high solid content two-component polyurethane environmental protection coating and preparation method thereof
  • A kind of high solid content two-component polyurethane environmental protection coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A kind of high solid alkyd resin A, its preparation process is as follows:

[0035] a), by weight percentage, sequentially add 23.0 parts of castor oil, 6.8 parts of isophthalic acid, 27.8 parts of phthalic anhydride, 3 parts of adipic acid, 10 parts of glycerin, 5 parts of trimethylolpropane, 1,4-butanediol 4 parts, 6.2 parts of polyethylene glycol 200 are added in the reaction kettle, start heating, when the material in the kettle is completely melted, pass into N 2 , start stirring and raise the temperature to 120°C, add 0.5 part of organotin catalyst, then raise the temperature to 165°C~180°C, add 6.0 parts of benzoic acid and 3 parts of reflux solvent, keep the reaction for 2~3h, and remove the water brought out by the reflux reaction 3.3 parts, and the cooled reflux solvent is transported to the top of the packed tower with a circulation pump;

[0036] b) When little water is separated, add 3.0 parts of dodecanol, heat up to 190°C for 1 hour, heat up to 200°C for...

Embodiment 2

[0039] A kind of high solid alkyd resin B, its preparation process is as follows:

[0040] a), by weight percentage, sequentially add 25.0 parts of soybean oil, 18.0 parts of phthalic anhydride, 12.0 parts of adipic acid, 3.5 parts of maleic anhydride, 12 parts of glycerin, 4.2 parts of trimethylolpropane, 6.0 parts of neopentyl glycol, poly Add 5.2 parts of ether glycol 400 into the reaction kettle, start heating, when the material in the kettle is completely melted, feed N 2 , start stirring and raise the temperature to 120°C, add 0.6 parts of organotin catalyst, then raise the temperature to 165°C-180°C, add 5.0 parts of benzoic acid and 3 parts of reflux solvent, keep the reaction for 2-3 hours, and remove the water brought out by the reflux reaction 3.6 parts, and the cooled reflux solvent is transported to the top of the packed tower with a circulation pump;

[0041] b) When little water is separated, add 2.5 parts of dodecyl alcohol, heat up to 190°C for 1 hour, heat u...

Embodiment 3

[0044] A kind of high solid alkyd resin C, its preparation process is as follows:

[0045] a), by weight percentage, sequentially add 22.0 parts of soybean oil, 25.6 parts of phthalic anhydride, 10.2 parts of adipic acid, 12.5 parts of trimethylolpropane, 10.0 parts of ethylene glycol, and 6.0 parts of polyethylene glycol 300 into the reaction kettle , start heating, when the material in the kettle is completely melted, feed N 2 , start stirring and raise the temperature to 120°C, add 0.5 part of organotin catalyst, then raise the temperature to 165°C~180°C, add 6.0 parts of benzoic acid and 3.6 parts of reflux solvent, keep the reaction for 2~3 hours, and remove the water brought out by the reflux reaction 3.8 parts, and the cooled reflux solvent is transported to the top of the packed tower with a circulation pump;

[0046] b) When little water is separated, add 2.6 parts of dodecyl alcohol, heat up to 190°C for 1 hour, then heat up to 200°C for 1 hour, then heat up to 210°...

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Abstract

The invention relates to a high-solid-content bi-component polyurethane environmentally-friendly coating. The coating is composed of an A component and a B component, and the A: the B=1:(0.5-1.2), wherein the A component is composed of high-solid-content alkyd resin, a filler or a color paste, an auxiliary agent and a solvent; and the B component is a polyurethane curing agent. The invention alsoprovides a preparation method of the high-solid-content alkyd resin with a solid content of 90%. According to the prepared high-solid-content bi-component polyurethane environmentally-friendly coatingprovided by the invention, the solid content under construction is >= 80%, the VOC is <= 200g / L, and the hazardous substance limiting amounts meet the requirements of a standard GB 18581-2009 and HJ414-2007; the coating has a high solid content and low viscosity, quick drying performance, no precipitation during storage; the film has good levelling performance and transparency, the thickness of the film of one-time film formation is > 140[mu]m, and the film has no sagging; and the film has excellent adhesion, water resistance, chemical resistance, abrasion resistance, scratch resistance and mechanical properties, and is widely used for surface coating of woodwares, metals, concrete and the like.

Description

technical field [0001] The invention relates to a two-component polyurethane coating, in particular to a high-solid content two-component polyurethane environmental protection coating and a preparation method thereof, belonging to the technical field of environmental protection coatings. Background technique [0002] Polyurethane coatings are currently the most commonly used type of coatings. Two-component polyurethane coatings are composed of isocyanate prepolymer and hydroxyl resin, usually called the main agent component and curing agent component; It is acrylic polyurethane, alkyd polyurethane, polyester polyurethane, polyether polyurethane, epoxy polyurethane and other varieties. Two-component polyurethane coatings have low film-forming temperature, strong adhesion, good wear resistance, high hardness, chemical resistance, good weather resistance and good mechanical properties, etc. They are widely used in wood coatings, automotive repair coatings, anti-corrosion coatin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/14C09D5/08C09D7/45C08G18/68C08G63/668C08G63/676C08G63/49
Inventor 许钧强康伦国张武王会池阳京辉陈龙
Owner UNION FOSHAN CHEM
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