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

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
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Example Embodiment

[0035] Example A

[0036] The specific synthesis process is as follows: (1) In a 5000ml reactor equipped with heating device, stirrer and distillation column, add 1665 parts of polyol component A (of which 1665 parts are neopentyl glycol). ), the normal pressure is increased to 110-130℃; the mass parts of the formula amount is 2575 parts of polybasic acid component B (2200 parts of terephthalic acid, 300 parts of isophthalic acid and 75 parts of hexamethylene Acid) and 5 parts by mass of the esterification catalyst component D (5 parts of monobutyl tin oxide), gradually heating up while stirring. (2) When the material temperature rises to 165-175°C, the esterification reaction begins, and esterified water begins to be generated and steamed out through the distillation column. Control the top steam temperature of the distillation column at 99°C ± 2°C; gradually increase the temperature while the esterification reaction The esterified water is distilled out, and when the temperatu...

Example Embodiment

[0037] Example B

[0038] The specific synthesis process is as follows: (1) In a 5000ml reactor equipped with heating device, stirrer and distillation column, add 1612 parts of polyol component A (of which 1512 parts are neopentyl glycol). , 100 parts is 2-methyl-1,3-propanediol), the normal pressure is raised to 110-130°C; then 2500 parts of polybasic acid component B (2200 parts of terephthalic acid) Formic acid, 300 parts is isophthalic acid), 90 parts by mass of hydrogenated dimer acid component C (90 parts of which are hydrogenated dimerized soybean oil fatty acid) and 5 parts by mass of esterification catalyst component D (5 parts of which are monobutyl tin oxide), gradually increase the temperature while stirring. (2) When the material temperature rises to 165-175°C, the esterification reaction begins, and esterified water begins to be generated and steamed out through the distillation column. Control the top steam temperature of the distillation column at 99°C ± 2°C; gra...

Example Embodiment

[0039] Example C

[0040] The specific synthesis process is as follows: (1) In a 5000ml reactor equipped with heating device, stirrer and distillation column, add 1620 parts of polyol component A (1540 parts of which are neopentyl glycol). , 80 parts is 2-butyl-2-ethyl-1,3-propanediol), the normal pressure is raised to 110-130°C; then 2440 parts of polybasic acid component B (of which 2200 Parts are terephthalic acid, 240 parts are isophthalic acid), 100 parts by mass of hydrogenated dimer acid component C (of which 50 parts are hydrogenated dimerized tall oil fatty acid, 50 parts are hydrogenated dimerized vegetable Seed oil fat number) and 5 parts by mass of esterification catalyst component D (4 parts are monobutyl tin oxide and 1 part is stannous oxalate), gradually heating up while stirring. (2) When the material temperature rises to 165-175°C, the esterification reaction begins, and esterified water begins to be generated and steamed out through the distillation column. Co...

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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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