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Polyester resin used for beta-hydroxyl alkyl amide solidified powdery paint having good water resistance and preparation method thereof

A hydroxyalkylamide, powder coating technology, applied in powder coatings, polyester coatings, coatings, etc., can solve the problem of poor water resistance and boiling resistance of the coating film, affecting the surface decoration performance of the coating film, and affecting the durable protection of the coating film. performance and other issues, to achieve the effect of improving flexibility, excellent decorative performance and protective performance, and improving impact resistance and bending

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] Therefore, due to the structure and performance characteristics of the curing agent hydroxyalkylamide, the polyester-Primid powder coating has the following two disadvantages in use: 1. The water resistance and water boiling resistance of the coating film are poor, and the coating film is not stable during use. It is easy to absorb water and turn white, which affects the surface decoration performance of the coating film and limits its wide use
2. The water resistance and boiling resistance of the coating film are poor, and the coating film is prone to color change and chalking during long-term use, which affects the durable protection performance of the coating film

Method used

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  • Polyester resin used for beta-hydroxyl alkyl amide solidified powdery paint having good water resistance and preparation method thereof
  • Polyester resin used for beta-hydroxyl alkyl amide solidified powdery paint having good water resistance and preparation method thereof
  • Polyester resin used for beta-hydroxyl alkyl amide solidified powdery paint having good water resistance and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment A

[0036] The concrete synthesis process is: (1) in the 5000ml reactor that is equipped with heating device, stirrer and distillation column, the mass number that adds formula quantity is 1665 parts of polyol component A (wherein 1665 parts are neopentyl glycol ), the normal pressure is heated up to 110-130 ℃; the mass fraction of adding formula quantity again is 2575 parts of polyacid component B (wherein 2200 parts are terephthalic acid, 300 parts are isophthalic acid and 75 parts are adipic acid acid) and 5 parts by mass of esterification catalyst component D (wherein 5 parts of monobutyltin oxide), gradually warming 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 99°C ± 2°C; Esterification water is distilled out, and when the temperature o...

Embodiment B

[0038] The specific synthesis process is: (1) in a 5000ml reactor equipped with a heating device, a stirrer and a distillation column, the polyol component A (wherein 1512 parts are neopentyl glycol) in which the mass parts of the formula amount are 1612 parts , 100 parts are 2-methyl-1,3-propanediol), normal pressure is heated up to 110-130 ℃; Add the polyacid component B (wherein 2200 parts are terephthalic acid components) in the mass parts of 2500 parts Formic acid, 300 parts is isophthalic acid), mass parts are 90 parts of hydrogenated dimer acid component C (wherein 90 parts are hydrogenated dimer soybean oil fatty acid) and mass parts are 5 parts of esterification catalyst component D (wherein 5 parts are monobutyltin oxide), gradually heat 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...

Embodiment C

[0040] The specific synthesis process is: (1) in a 5000ml reactor equipped with a heating device, a stirrer and a distillation column, the polyol component A (wherein 1540 parts are neopentyl glycol) is added with a formula quantity of 1620 parts by mass , 80 parts are 2-butyl-2-ethyl-1,3-propanediol), and the temperature is raised to 110-130 °C under normal pressure; then the mass parts of the formulation amount are 2440 parts of polyacid component B (wherein 2200 part is terephthalic acid, 240 parts are isophthalic acid), mass parts are 100 parts of hydrogenated dimer acid component C (wherein 50 parts are hydrogenated dimerized tall oil fatty acid, 50 parts are hydrogenated dimerized vegetable Seed oil fat number) and mass parts are 5 parts of esterification catalyst component D (wherein 4 parts are monobutyl tin oxide, 1 part is stannous oxalate), while stirring, gradually heat up. (2) The temperature of the material rises to 165-175°C, the esterification reaction begins, ...

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Abstract

The invention relates to polyester resin used for a powdery paint and a preparation method thereof, and provides the polyester resin used for the beta-hydroxyl alkyl amide solidified powdery paint having good water resistance and the preparation method thereof. The polyester resin comprises the following components by mass percentage through melt polymerization: a polyol component A, a polyatomic acid component B, a hydrogenated dimeric acid component C, an esterification catalyst component D, an alcoholysis agent component E and an anti-oxidant component F; the method comprises the following steps: adding the component A, then adding the component B, the component C and the component D, stirring the materials while heating gradually; performing fusion and esterification condensation; adding the component E and performing an acidolysis reaction; adding the component F, stirring the materials for a reaction; cooling the material and discharging the material, and cooling the product and crushing the product. A beta-hydroxyl alkyl amide solidified powdery paint film prepared by the polyester resin has excellent water resistance and boiling resistance, excellent levelability and fullness, and has machinery performances such as good impact resistance and bending.

Description

technical field [0001] The invention relates to a method for preparing powder coating components, in particular to a polyester resin for powder coatings with good curing and water resistance of β-hydroxyalkylamide and its preparation method Background technique [0002] Due to its economy, environmental protection, high efficiency, and excellent performance, powder coatings are recognized as green and environmentally friendly coatings. According to different matrix resins and curing agents, powder coatings can be divided into pure epoxy powder coatings, polyester-epoxy hybrid coatings, etc. Type powder coating, pure polyester type powder coating, polyurethane type powder coating and acrylic type powder coating, etc. The curing agents of pure polyester powder coating systems mainly include triglycidyl isocyanurate (TGIC), hydroxyalkylamide (Primid), polyepoxides, amino resins, tetramethoxyglycolurils, etc. At present, pure polyester powder coatings on the market are mainly p...

Claims

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Application Information

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IPC IPC(8): C08G63/20C08G63/199C08G63/183C08G63/78C09D167/02C09D5/03
CPCC08G63/20C08G63/183C08G63/199C08G63/78C09D5/03C09D167/02
Inventor 应明友汤明麟石嫚嫚黄志钱储坚刚
Owner ZHEJIANG CHUANHUA TIANSONG NEW MATERIAL CO LTD
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