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A kind of organosilicon-modified carboxyl-terminated polyester resin for Tgic heat-resistant powder coating and preparation method thereof

A carboxyl-terminated polyester and powder coating technology, applied in powder coatings, polyester coatings, coatings, etc., can solve the problems of heat resistance and limit of polymer, achieve good modification effect and improve performance , the effect of reducing costs

Active Publication Date: 2015-09-30
GUANGZHOU KINTE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the performance advantage and price advantage of this type of polyester resin can greatly expand its market and application range, it should be noted that due to the copolymerization of silicone and polyester resin, that is to say, its chain segment also contains more C-O bond and C-C bond, and this is the main reason why polymers are not heat-resistant, so there is actually a limit to the degree of heat resistance that can be improved

Method used

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  • A kind of organosilicon-modified carboxyl-terminated polyester resin for Tgic heat-resistant powder coating and preparation method thereof
  • A kind of organosilicon-modified carboxyl-terminated polyester resin for Tgic heat-resistant powder coating and preparation method thereof
  • A kind of organosilicon-modified carboxyl-terminated polyester resin for Tgic heat-resistant powder coating and preparation method thereof

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Embodiment Construction

[0025] The silicone in the following synthesis examples can be alkoxy (Si-OR') silicone intermediates (oligomers), including Dow Corning products such as RSN-3074, RSN-3037 and Wacker 368, and can also be silicone intermediates (oligomers) containing Silicone hydroxyl (Si-OH) silicone intermediates (oligomers), including Dow Corning's RSN-6018 and Wacker 604.

[0026] Synthesis Example 1: Synthesis of Silicone Modified Polyester Resin A

[0027] In a 1L four-necked flask equipped with a heating mantle, stirrer, thermometer, distillation column and condenser tube, add 215g of neopentyl glycol, raise the temperature to 140°C until the neopentyl glycol is completely melted, and then add silicon hydroxyl (Si-OH ) silicone intermediate (RSN-6018) 60g, heat up to 170°C, keep warm for 1h, then add 321.5g of terephthalic acid and 0.6g of tetrabutyl titanate in sequence, heat up to 180°C under nitrogen gas to start esterification React and produce esterified water to distill out. Dur...

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Abstract

The invention discloses an organosilicon modified carboxyl-terminated polyester resin for a heat-resistant powder coating. The organosilicon modified carboxyl-terminated polyester resin is formed by melt polycondensation reaction of the following components by weight percent: 5-25 percent of organosilicon, 25-45 percent of polyatomic alcohol, 35-65 percent of aromatic polyhydric acid, 0-5 percent of fat polyhydric acid, 4-15 percent of acidolysis agent and 0.01-0.15 percent of esterification catalyst. The invention further discloses a preparation method of the organosilicon modified carboxyl-terminated polyester resin for the heat-resistant powder coating. The polyester resin prepared by adopting the method has proper glass transition temperature, softening point and storage stability, and the powder coating prepared by the organosilicon modified carboxyl-terminated polyester resin has excellent heat resistance and is particularly suitable for polyester / TGIC curing systems.

Description

technical field [0001] The invention relates to an organosilicon-modified carboxyl-terminated polyester resin for TGIC heat-resistant powder coatings, and also relates to a preparation method of the organosilicon-modified carboxyl-terminated polyester resin. Background technique [0002] Powder coating and its coating have developed rapidly since the 1970s and 1980s due to the characteristics of low pollution, resource saving, high labor productivity and ease of automatic production. With the development of the coatings industry, powder coatings have been widely used in the coating of metal substrates. In recent years, the development and application of functional products such as antibacterial, high wear-resistant, and heat-resistant types have become powder coatings. direction of development. Heat-resistant powder coatings refer to powder coatings that can withstand temperatures above 200°C for a long time, have a good coating film, and enable the protected object to fun...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/695C09D167/00C09D167/02C09D5/03
Inventor 顾宇昕谢静李勇何涛曾定
Owner GUANGZHOU KINTE IND
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