Polyester resin having good stone chip-resistant performance used for transparent powdery paint and preparation method thereof

A powder coating and anti-stone chip technology, which is applied in the direction of powder coatings, etc., can solve the problems of transparent powder coating film transparency and poor leveling, surface hardness and toughness of the coating film, etc., to achieve excellent leveling, good stone resistance Impact performance, enhance the effect of flexibility

Inactive Publication Date: 2017-10-17
ZHEJIANG CHUANHUA TIANSONG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1. Due to the characteristics and characteristics of polyester resin, the transparency and leveling of the transparent powder coating film prepared by it are poor
[0007] 2. Due to the characteristics of the curing system, the surface hardness and toughness of the coating film are poor

Method used

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  • Polyester resin having good stone chip-resistant performance used for transparent powdery paint and preparation method thereof
  • Polyester resin having good stone chip-resistant performance used for transparent powdery paint and preparation method thereof
  • Polyester resin having good stone chip-resistant performance used for transparent powdery paint and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment A

[0043] The specific implementation of the synthesis process is: (1) in a 3000ml reactor equipped with a heating device, agitator and a distillation column, the polyol component A (wherein 775 parts of neopentyl glycol ), heated to 110-130°C under normal pressure; 1165 parts by mass of the proportioning amount was added to be polyacid component B (990 parts of terephthalic acid, 100 parts of isophthalic acid, 75 parts of adipic acid) and 2.5 parts by mass of esterification catalyst component D (including 2.5 parts of monobutyltin oxide), the temperature was gradually raised while stirring. (2) The temperature of the material rises to 165-175°C, the esterification reaction begins, and the esterification water begins to be generated and steamed out through the distillation column. The steam temperature at the top of the distillation column is controlled at 99°C ± 2°C; Esterification water is distilled out, and when the temperature of the material rises to 245°C ± 2°C, heat preser...

Embodiment B

[0045] The specific implementation of the synthesis process is: (1) in a 3000ml reactor equipped with a heating device, agitator and a distillation column, the polyol component A (wherein 695 parts of neopentyl glycol , 60 parts of 1,4-cyclohexanedimethanol), and the temperature is raised to 110-130°C under normal pressure; then 1090 parts by mass of the proportioning amount are put into polyacid component B (990 parts of terephthalic acid, 100 parts isophthalic acid), 60 parts by mass of hydrogenated dimer acid component C (60 parts of hydrogenated dimer soybean oil fatty acid) and 2.5 parts by mass of esterification catalyst component D (2.5 parts of single Butyltin oxide), gradually heating up while stirring. (2) The temperature of the material rises to 165-175°C, the esterification reaction begins, and the esterification water begins to be generated and steamed out through the distillation column. The steam temperature at the top of the distillation column is controlled at...

Embodiment C

[0047] The concrete implementation synthesis process is: (1) in the 3000ml reactor that is equipped with heating device, agitator and distillation column, the polyol component A (wherein 660 parts of neopentyl glycol , 60 parts of 2-methyl-1,3-propanediol, 60 parts of 1,4-cyclohexanedimethanol), and the temperature is raised to 110-130°C under normal pressure; Component B (990 parts of terephthalic acid, 80 parts of isophthalic acid, 60 parts of 1,4-cyclohexanedicarboxylic acid), 90 parts by mass of hydrogenated dimer acid component C (90 parts of Hydrogenated dimerized tall oil fatty acid) and the esterification catalyst component D (wherein 2.5 parts of monobutyltin oxide) that mass fraction is 2.5 parts, while stirring, gradually heat up. (2) The temperature of the material rises to 165-175°C, the esterification reaction begins, and the esterification water begins to be generated and steamed out through the distillation column. The steam temperature at the top of the distil...

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Abstract

The invention relates to polyester resin used for a transparent powdery paint and a preparation method thereof, and provides the polyester resin having good stone chip-resistant performance used for the transparent powdery paint and the preparation method thereof. The polyester resin comprises the following main components by mass percentage through fusion polymerization: a polyols component A, a polyacids component B, a hydrogenated dimeric acid component C, an esterification catalyst component D, an alcoholysis agent component E, an anti-oxidant component F and a curing accelerator component G; the preparation method comprises the following steps: adding the component A, then adding the component B, the component C and the component D, stirring the components and gradually heating the components; performing a melt esterification condensation reaction; performing a primary pressure reduction reaction; adding the component E and performing an alcoholysis reaction; performing a secondary pressure reduction reaction; adding the component F and the component G, stirring the components for a reaction; cooling the materials and discharging the product, and cooling the product and crushing the product. A polyurethane transparent powdery paint film prepared by the polyester resin has excellent levelability, high glossiness and transparency, and good stone chip-resistant performance.

Description

technical field [0001] The invention relates to a polyester resin for powder coatings and a preparation method thereof, in particular to a polyester resin for transparent powder coatings with good stone chip resistance and a preparation method thereof. Background technique [0002] With the improvement of people's living standards and the pursuit of high quality of life, affected by national environmental protection policies and industrial policies, the use of coatings containing volatile substances (VOC) emissions will be increasingly restricted. Powder coatings are a 100% solid Varieties of coatings without VOC emissions are recognized as green and environmentally friendly coatings due to their economical, environmental protection, high efficiency, and excellent performance. They are one of the main directions for the research and development of the coatings industry. With the development of powder coatings, the varieties of powder coatings are becoming more and more abund...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/183C08G63/199C08G63/85C08G63/91C09D175/06C09D5/03
CPCC08G63/183C08G63/199C08G63/85C08G63/916C09D5/03C09D175/06
Inventor 应明友黄志钱储坚刚章道军汤明麟
Owner ZHEJIANG CHUANHUA TIANSONG NEW MATERIAL CO LTD
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