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Organic silicon modified water-based polyester dispersion, preparation method thereof and water-based coating

A water-based polyester and water-based paint technology, applied in the field of polyester resin materials, can solve undiscovered problems and achieve enhanced stability, excellent adhesion, and good stability

Pending Publication Date: 2019-07-19
广东迪爱生彤德树脂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, almost all silicone-modified polyester resins on the market are solvent-based resins, and no silicone-modified water-based polyester resins have been found in the domestic market.

Method used

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  • Organic silicon modified water-based polyester dispersion, preparation method thereof and water-based coating
  • Organic silicon modified water-based polyester dispersion, preparation method thereof and water-based coating
  • Organic silicon modified water-based polyester dispersion, preparation method thereof and water-based coating

Examples

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preparation example Construction

[0044] The present invention also provides the preparation method of above-mentioned organosilicon-modified aqueous polyester dispersion, comprises the following steps:

[0045] S110: adding the polyol, the organosilicon intermediate and the catalyst into the reaction equipment, at a temperature of 115° C. to 200° C., until the organosilicon intermediate and the polyol fully react.

[0046] S210: Add dibasic acid and monomers with grafted functional groups, under the protection of nitrogen, slowly heat to 150°C-220°C, react until the acid value reaches 3-10mgKOH / g, cool down to 80°C-160°C, add Co-solvent to form polyester intermediate solution.

[0047] S310: adjusting the temperature to 100° C.-190° C., and adding the mixed monomer and part of the initiator dropwise into the polyester intermediate solution under agitation to carry out a copolymerization reaction.

[0048] Preferably, the monomers and part of the initiator are mixed to form a mixed liquid, and then the mixed ...

Embodiment 1

[0061] In this example, the raw materials for preparing the silicone-modified waterborne polyester dispersion include the following components by weight: 18 parts of polyols, 18 parts of silicone intermediates, 0.03 parts of catalysts, 7.5 parts of dibasic acids, 1 part of active functional group monomer, 7.5 parts of cosolvent, 5.5 parts of mixed monomer, 0.5 part of initiator, 2 parts of organic amine, 40 parts of deionized water.

[0062] The polyhydric alcohol is neopentyl glycol and trimethylolethane, and the contents of neopentyl glycol and trimethylolethane in parts by weight are respectively: 10 parts of neopentyl glycol and 8 parts of trimethylolethane.

[0063] The silicone intermediate is Corning 3074 intermediate.

[0064] The catalyst is tetrabutyl titanate.

[0065] The dibasic acid is isophthalic acid, adipic acid and phthalic anhydride, and the parts by weight of isophthalic acid, adipic acid and phthalic anhydride are respectively: 3 parts of isophthalic acid...

Embodiment 2

[0081] In this example, the raw materials for preparing the silicone-modified waterborne polyester dispersion include the following components by weight: 15 parts of polyols, 13 parts of silicone intermediates, 0.04 parts of catalysts, 8 parts of dibasic acids, 2 parts of active functional group monomer, 10 parts of co-solvent, 5 parts of mixed monomer, 1 part of initiator, 2 parts of organic amine, 49 parts of deionized water.

[0082] The polyhydric alcohol is neopentyl glycol and trimethylol propane, and the weight contents of neopentyl glycol and trimethylol propane are respectively 9 parts of neopentyl glycol and 6 parts of trimethylol propane.

[0083] The silicone intermediate is Dow Corning 3074 intermediate.

[0084] The catalyst is isobutyl titanate.

[0085] The dibasic acid is phthalic anhydride and azelaic acid, and the weight parts of phthalic anhydride and azelaic acid are respectively: 3 parts of phthalic anhydride and 5 parts of azelaic acid.

[0086] The mo...

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Abstract

The invention relates to an organic silicon modified water-based polyester dispersion, a preparation method thereof and a water-based coating. Raw materials for preparing the organic silicon modifiedwater-based polyester dispersion comprise the following components in parts by weight: 10-18 parts of polyol, 7.5-20 parts of organic silicon intermediate, 0.03-0.05 part of catalyst, 5-11 parts of dibasic acid, 1-3 parts of monomer with grafted active functional groups, 7-13 parts of cosolvent, 3-10 parts of mixed monomer, 0.5-1.5 parts of initiator, 1-2 parts of organic amine and 40-60 parts ofdeionized water, wherein the mixed monomer is an acrylic monomer. 10-18 parts by weight of polyol and 5-15 parts by weight of dibasic acid are adopted, so that the terminated functional groups of organic silicon modified water-based polyester contain more hydroxyl groups and carboxyl groups; during high-temperature curing formation of a film, carboxyl and hydroxyl are subjected to a cross-linkingreaction to form the film, so that a coating containing the organic silicon modified water-based polyester dispersion does not need additional addition of a curing agent in the spraying process, and the obtained coating film has excellent adhesive force, water resistance and high-temperature resistance.

Description

technical field [0001] The invention relates to the technical field of polyester resin materials, in particular to an organosilicon-modified water-based polyester dispersion, a preparation method thereof and a water-based paint. Background technique [0002] Silicone resin and polyester resin are two extremely important types of resin materials. Although these two types of resins have certain characteristics, they also have certain defects. Silicone resin has excellent properties such as heat resistance, weather resistance, and electrical insulation, but has problems such as poor mechanical strength, adhesion, and solvent resistance. The polyester resin has the characteristics of high fullness, high gloss, good adhesion, excellent chemical resistance, and high hardness of the coating film, but has defects such as high temperature resistance and poor workability. [0003] At present, strict environmental protection laws have been formulated successively at home and abroad to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/01C08F220/20C08F220/14C08F212/08C08F220/06C08F220/18C08G63/695C08G63/85C09D151/08
CPCC08F283/01C08F220/18C08F220/06C08F220/14C08F212/08C08G63/6958C08G63/85C09D151/08C08F220/1811C08F220/1804C08F220/1808
Inventor 麦嘉雯陈安珣陈鹏
Owner 广东迪爱生彤德树脂有限公司