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Polyester resin for anti-yellowing HAA (N,N,N',N'-tetra(Beta-hydroxyethyl)adipamide) system powder paint, preparation method and application

A polyester resin and powder coating technology, applied in powder coatings, polyester coatings, coatings, etc., can solve the problems of anti-oxidation, general anti-yellowing performance, decline in anti-yellowing performance, and performance decline, and achieve anti-yellowing Excellent denaturation performance, high temperature resistance and excellent anti-yellowing performance

Active Publication Date: 2018-12-21
HUANGSHAN HUIZHOU KANGJIA CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] For the long-acting anti-yellowing polyester resin obtained by the above method, the raw materials of the polyester used are still mainly traditional raw materials. Antioxidants are used to achieve high temperature resistance and yellowing resistance. The added antioxidants are small in size and do not participate in the reaction of polyester resin. The coating is easily lost when used outdoors, resulting in a decrease in anti-yellowing performance, especially after boiling. Significant drop in performance in terms of yellowing

Method used

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  • Polyester resin for anti-yellowing HAA (N,N,N',N'-tetra(Beta-hydroxyethyl)adipamide) system powder paint, preparation method and application
  • Polyester resin for anti-yellowing HAA (N,N,N',N'-tetra(Beta-hydroxyethyl)adipamide) system powder paint, preparation method and application
  • Polyester resin for anti-yellowing HAA (N,N,N',N'-tetra(Beta-hydroxyethyl)adipamide) system powder paint, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] Anti-yellowing HAA system powder coating polyester resin and preparation method thereof, comprising the following steps:

[0081] Prepare the raw materials according to the following proportions:

[0082] main ingreadient:

[0083] Pyromellitic dianhydride 12mol%; 1,6-hexanediamine 9mol%; isophthalic acid 12mol%; phloroglucinol formic acid 15mol%; ethanetricarboxylic acid monoester 12mol%; Hydroxyhexane 14mol%; Neopentyl glycol 16mol%; 2,2'-biphenyl dicarboxylic acid 10mol%;

[0084] Accessories:

[0085] Catalyst dioctyltin oxide, consumption is 0.2mol%;

[0086] Antioxidant 2,2'-thiobis(4-methyl-6-tert-butylphenol), the consumption is 0.9mol% of the total molar weight of main raw materials;

[0087] Wherein, the preparation method of ethanetricarboxylic acid monoester compound is as follows: ethanetricarboxylic acid and tetrakis [β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester according to molar ratio 1 Dissolve in xylene solvent in a rati...

Embodiment 2

[0127] The preparation method of the used polyester resin of anti-yellowing HAA system coating comprises the steps:

[0128] Prepare the raw materials according to the following proportions:

[0129] main ingreadient:

[0130]Pyromellitic dianhydride 9mol%; 1,6-hexanediamine 7mol%; isophthalic acid 15mol%; phloroglucinol formic acid 15mol%; ethanetricarboxylic acid monoester 14mol%; Hydroxyhexane 15mol%; Neopentyl glycol 15mol%; 2,2'-biphenyl dicarboxylic acid 10mol%;

[0131] Accessories:

[0132] Catalyst dioctyltin oxide, the dosage is 0.1mol% of the total molar weight of main raw materials;

[0133] Antioxidant 2,2'-thiobis(4-methyl-6-tert-butylphenol), the consumption is 1mol% of the total molar weight of main raw materials;

[0134] Wherein, the preparation method of ethanetricarboxylic acid monoester compound is with embodiment 1;

[0135] After preparing the ingredients, follow the steps below:

[0136] (1) Put pyromellitic dianhydride, 1,6-hexamethylenediamine a...

Embodiment 3

[0142] The preparation method of the used polyester resin of anti-yellowing HAA system coating comprises the steps:

[0143] Prepare the raw materials according to the following proportions:

[0144] main ingreadient:

[0145] Pyromellitic dianhydride 18mol%; 1,6-hexanediamine 13mol%; isophthalic acid 8mol%; phloroglucinol formic acid 12mol%; ethanetricarboxylic acid monoester 12mol%; Hydroxyhexane 14mol%; Neopentyl glycol 15mol%; 2,2'-biphenyl dicarboxylic acid 8mol%;

[0146] Accessories:

[0147] Catalyst dioctyltin oxide, the dosage is 0.3mol% of the total molar weight of main raw materials;

[0148] Antioxidant 2,2'-thiobis(4-methyl-6-tert-butylphenol), the consumption is 1.5mol% of the total molar weight of main raw materials;

[0149] Wherein, the preparation method of ethanetricarboxylic acid monoester compound is with embodiment 1;

[0150] After preparing the ingredients, follow the steps below:

[0151] (1) Put pyromellitic dianhydride, 1,6-hexamethylenediamin...

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Abstract

The invention belongs to the technical field of resin production, and particularly relates to a polyester resin for an anti-yellowing HAA (N,N,N',N'-tetra(Beta-hydroxyethyl)adipamide) system and further relates to a preparation method and application of the polyester resin. The anti-yellowing HAA system provided by the invention is polymerized by using pyromellitic dianhydride, 1,6-hexanediamine,isophthalic acid, phloroglucinol formic acid, ethanetricarboxylic acid monoester, 2,5-dihydroxy hexane, neopentyl glycol and 2,2'-diphenic acid. Because a polyimide chain is carried in the molecular chain of the polyester resin obtained by the materials and a specific process, the high temperature-resistant and anti-yellowing properties are excellent; moreover, because the materials containing phenolic hydroxyl groups, such as phloroglucinol formic acid and ethanetricarboxylic acid monoester, are used for participating in reaction and the phenolic functional group with high anti-yellowing capability is contained in the polyester chain, the polyester product has excellent high temperature-resistant and anti-yellowing properties, and is ultimately used in the powder paint of the HAA system,so that a coated panel with excellent anti-yellowing property can be obtained.

Description

technical field [0001] The invention belongs to the technical field of resin production, and in particular relates to a polyester resin for an anti-yellowing HAA system, and also relates to a preparation method and application of the above-mentioned polyester resin. Background technique [0002] The full name of HAA is N, N, N', N'-tetra(β-hydroxyethyl) adipamide, which contains amine groups in the molecule, which leads to insufficient anti-yellowing performance on the surface of the coating film, and the coating film is prone to yellowing at high temperature , HAA system anti-yellowing coating film is difficult to obtain. [0003] CN107868234A discloses a method for preparing long-acting anti-yellowing polyester resin, the method comprising: [0004] (1) carry out condensation polymerization after a part of polybasic acid is mixed with polyol, esterification catalyst and polymerization inhibitor, in order to obtain the first reaction system of acid number 10-18mg KOH / g; ...

Claims

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Application Information

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IPC IPC(8): C08G63/685C08G73/10C09D167/00C09D5/03C09D7/61C09D7/63
CPCC08G63/6854C08G73/1082C08K2003/2241C08K2003/3045C09D5/033C09D167/00C08K3/22C08K3/30C08K5/20
Inventor 周勇王永垒吴泽凯汪利华谭卫东洪昭武
Owner HUANGSHAN HUIZHOU KANGJIA CHEM CO LTD
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