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Polyester resin for low-gloss TGIC system powder coating and preparation method and application thereof

A powder coating, polyester resin technology, applied in powder coatings, polyester coatings, coatings, etc., can solve the problems of matching curing, low melt viscosity, low gloss coating film, etc., to achieve good stability, excellent flatness, Excellent smoothness effect

Inactive Publication Date: 2019-02-12
周鹤洋
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The polyester resin P5980 used in CN106752765A is an indoor powder coating polyester resin matched with E-12 epoxy resin, which can only be used for indoor powder coating systems, and is only suitable for low temperature curing such as 160 ° C / 15min can be obtained Low-gloss coating, high temperature curing 180°C / 15min cannot achieve a good matting effect due to low melt viscosity, and the P5980 polyester resin cannot be cured with TGIC, so it is not suitable for TGIC outdoor weather resistance system

Method used

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  • Polyester resin for low-gloss TGIC system powder coating and preparation method and application thereof
  • Polyester resin for low-gloss TGIC system powder coating and preparation method and application thereof
  • Polyester resin for low-gloss TGIC system powder coating and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] The preparation method of low-gloss TGIC system polyester resin, its steps are as follows:

[0064] S1: prepare raw material A, the molar percentage of raw material A component is as follows:

[0065]

[0066] Prepare raw material B: the content of each component of raw material B is as follows:

[0067] Esterification catalyst: di-n-octyltin dichloride, its consumption is 0.2mol% of the total molar weight of raw material A;

[0068] Antioxidant: Antioxidant 1010, its dosage is about 0.3mol% of the total molar weight of raw material A;

[0069] In the following steps, take according to the dosage prepared in S1;

[0070] S2: Add neopentyl glycol, polyethylene glycol diglycidyl ether, and 3-hydroxy-4-aminobutyric acid prepared in S1 into a mixer, and heat and melt at 125° C. to obtain a mixed material;

[0071] S3: Add isophthalic acid, pyridine-2,6-dicarboxylic acid, and 6-acetylaminocaproic acid to the mixed material obtained in S2, and at the same time add an es...

Embodiment 2

[0112] The preparation method of low-gloss TGIC system polyester resin, its steps are as follows:

[0113] S1: prepare raw material A, the molar percentage of raw material A component is as follows:

[0114]

[0115] Prepare raw material B: the content of each component of raw material B is as follows:

[0116] Esterification catalyst: di-n-octyltin dichloride, its consumption is 0.1mol%;

[0117] Antioxidant 1010, the dosage is about 0.2mol%;

[0118] In the following steps, take according to the dosage prepared in S1;

[0119] S2: Add neopentyl glycol, polyethylene glycol diglycidyl ether, and 3-hydroxy-4-aminobutyric acid prepared in S1 into a mixer, and heat and melt at 128°C to obtain a mixed material;

[0120] S3: Add isophthalic acid, pyridine-2,6-dicarboxylic acid, and 6-acetylaminocaproic acid to the mixed material obtained in S2, and add an esterification reaction catalyst at the same time, and gradually raise the temperature to 220°C under the protection of ni...

Embodiment 3

[0124]The preparation method of low-gloss TGIC system polyester resin, its steps are as follows:

[0125] S1: prepare raw material A, the molar percentage of raw material A component is as follows:

[0126]

[0127] Prepare raw material B: the content of each component of raw material B is as follows:

[0128] Catalyst for esterification reaction: di-n-octyltin dichloride, the dosage is about 0.3mol%;

[0129] Antioxidant: Antioxidant 1010, the dosage is about 0.3mol%;

[0130] In the following steps, take according to the dosage prepared in S1;

[0131] S2: Add neopentyl glycol, polyethylene glycol diglycidyl ether, and 3-hydroxy-4-aminobutyric acid prepared in S1 into a mixer, and heat and melt at 125° C. to obtain a mixed material;

[0132] S3: Add isophthalic acid, pyridine-2,6-dicarboxylic acid, and 6-acetylaminocaproic acid to the mixed material obtained in S2, and at the same time add the esterification reaction catalyst di-n-octyltin dichloride, and gradually hea...

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Abstract

The invention belongs to the technical field of resin production, and specifically relates to polyester resin for low-gloss TGIC system powder coating, a preparation method of the polyester resin, andapplication of the polyester resin. The polyester resin is mainly prepared from isophthalic acid, pyridine-2,6-dicarboxylic acid, 6-acetylaminocaproic acid, 3-hydroxy-4-aminobutyric acid, polyethylene glycol diglycidyl ether, neopentyl glycol, 2,4,6-trihydroxybenzoic acid, N-hydroxyethyl ethylenediamine tri-acetic acid, an esterification catalyst and an antioxidant. The molecules of the polyesterresin prepared by the method disclosed by the invention simultaneously contain active amino groups, hydroxyl groups and carboxyl groups, difference between the three kinds of base groups and epoxidegroups in TGIC molecules in curing reaction rate can be used for preparing low-gloss powder coating (gloss<20%), and the film coating properties can completely reach various requirements of powder coating.

Description

technical field [0001] The invention belongs to the technical field of resin production, and in particular relates to a low-gloss TGIC system powder coating polyester resin, and also relates to a preparation method of the polyester resin and an application of the polyester resin. Background technique [0002] Since its appearance in the 1970s, powder coatings do not contain organic solvents and are 100% solid components. Compared with conventional coatings, powder coatings have the advantages of no pollution, saving energy and resources, high mechanical strength of coating films, and full recovery of excess coatings. Advantages, it is more and more widely used in the coating of household appliances, automobile industry, office appliances, metal materials, outdoor buildings and other shells. [0003] Ordinary powder coatings for TGIC systems are currently the most widely used outdoor weather-resistant powder coatings. Due to the relatively uniform and single molecular structu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/685C09D167/00C09D5/03
CPCC08G63/6854C09D5/03C09D167/00
Inventor 周鹤洋
Owner 周鹤洋
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