Polyester resin for powder coating and preparation method thereof

A polyester resin and powder coating technology, applied in powder coatings, polyester coatings, coatings, etc., can solve the problems of formaldehyde and non-compliance with environmental protection requirements, and improve weather resistance, glass transition temperature, and hardness high effect

Inactive Publication Date: 2019-11-05
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a polyester resin for powder coatings and a preparation method thereof, which solves the problem that the existing polyester resin powder coatings contain formaldehyde and do not meet the requirements of environmental protection

Method used

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  • Polyester resin for powder coating and preparation method thereof
  • Polyester resin for powder coating and preparation method thereof
  • Polyester resin for powder coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] This embodiment is the preparation of polyester resin for powder coating

[0046] The raw materials of polyester resin for powder coatings are: polyols, polyacids, acidolysis agents, esterification catalysts, antioxidants and curing accelerators, among which polyols include neopentyl glycol, bisphenol A, bisphenol S and trihydroxy Methyl propane; polybasic acid is terephthalic acid and adipic acid; polybasic acid is terephthalic acid and adipic acid; esterification catalyst is monobutyltin oxide; acidolysis agent is isophthalic acid and 1,4-cyclo Hexane dicarboxylic acid, and the molar ratio is 2:1; Antioxidant is antioxidant 1076 and antioxidant 168, and mass ratio is 1:1; Curing accelerator is triphenyl ethyl phosphorus bromide; Wherein, polyhydric alcohol and polyhydric The molar ratio of acid is 1.1:1, the ratio of the total molar weight of polybasic acid and acidolysis agent to the molar weight of polyol is 1.0476:1, and the amount of bisphenol A and bisphenol S ac...

Embodiment 2

[0049] This embodiment is the preparation of polyester resin for powder coating

[0050] The raw materials of polyester resin for powder coatings are: polyols, polyacids, acidolysis agents, esterification catalysts, antioxidants and curing accelerators, wherein polyols include neopentyl glycol, bisphenol A and trimethylolpropane; The polybasic acid is terephthalic acid and adipic acid; the polybasic acid is terephthalic acid and adipic acid; the esterification catalyst is monobutyltin oxide; the acidolysis agent is isophthalic acid and 1,4-cyclohexanedicarboxylic acid , and the molar ratio is 2:1; the antioxidant is antioxidant 1076 and antioxidant 168, and the mass ratio is 2:1; the curing accelerator is triphenylethylphosphorus bromide; wherein, the molar ratio of polyhydric alcohol / polyacid is 1.13:1, the ratio of the total molar mass of polybasic acid and acidolytic agent to the molar mass of polyol is 1.0502:1, the amount of bisphenol A accounts for 7wt% of the total mass...

Embodiment 3

[0053] This embodiment is the preparation of polyester resin for powder coating

[0054] The raw materials of polyester resin for powder coatings are: polyols, polyacids, acidolysis agents, esterification catalysts, antioxidants and curing accelerators, wherein polyols include neopentyl glycol, bisphenol A and trimethylolpropane; The polybasic acid is terephthalic acid and adipic acid; the polybasic acid is terephthalic acid and adipic acid; the esterification catalyst is monobutyltin oxide; the acidolysis agent is isophthalic acid and 1,4-cyclohexanedicarboxylic acid , and the molar ratio is 2:1; the antioxidant is antioxidant 1010 and antioxidant 168, and the mass ratio is 2:1; the curing accelerator is triphenylethylphosphorus bromide; wherein, the molar ratio of polyhydric alcohol / polyacid is 1.15, the ratio of the total molar weight of polybasic acid and acidolytic agent to the molar weight of polyol is 1.0475:1, the consumption of bisphenol A accounts for 10wt% of the to...

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Abstract

The invention relates to the technical field of coatings, in particular to polyester resin for a powder coating and a preparation method thereof. Raw materials of the polyester resin do not contain formaldehyde and are free of toxics, health and environmentally friendly. A bisphenol monomer has good heat resistance and high rigidity and is cheaper than neopentyl glycol. As other basic raw materials keep the same, the use of the bisphenol monomer can improve the glass transition temperature, storage performance and weather resistance of the polyester resin for the powder coating and the impactresistance of the coating; the addition of a small amount of trimethylolpropane can improve the branching degree of the polyester resin, and the use of an antioxidant can effectively enhance the oxidation resistance of the polyester resin, and then the weather resistance of the powder coating is improved.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a polyester resin for powder coatings and a preparation method thereof. Background technique [0002] Due to the advantages of economy, environmental protection, high efficiency and excellent performance, powder coatings are widely used in the coating of aluminum extrusion materials for doors and windows, home appliances and furniture, bicycle bodies and other fields. Powder coating has solvent-free, excellent mechanical properties and mechanical properties, which can well meet the needs of the market. As the governments of various countries restrict VOC emissions, powder coatings will gradually replace traditional solvent-based coatings and become a pillar industry in the coatings industry. [0003] Compared with other powder coatings, polyester resin powder coatings have better weather resistance and heat resistance, and other performance indicators basically meet the require...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/688C08G63/20C08G63/195C08G63/78C08G63/91C09D167/02C09D5/03
CPCC08G63/195C08G63/20C08G63/6886C08G63/78C08G63/916C08L2201/08C09D5/03C09D167/02C08K5/1345C08K5/526
Inventor 易国斌王韶顺刘杰鸣苏秋萍何嘉健
Owner GUANGDONG UNIV OF TECH
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