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Powder coating polyester resin for exhaust pipe of motor vehicle and preparation method thereof

A powder coating and polyester resin technology, applied in powder coatings, fireproof coatings, polyester coatings, etc., can solve the problem that the temperature and weather resistance cannot meet the needs of actual use, achieve efficient esterification combination, improve efficiency, strong rigid effect

Active Publication Date: 2019-02-05
ZHEJIANG GUANGHUA NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In reality, the coatings coated on motor vehicle exhaust pipes have relatively high requirements for temperature and weather resistance. However, the coatings actually coated on motor vehicle exhaust pipes cannot meet the needs of actual use in terms of temperature and weather resistance. Therefore, it is urgent to develop a powder coating with good temperature resistance and weather resistance to solve the problems in the prior art

Method used

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  • Powder coating polyester resin for exhaust pipe of motor vehicle and preparation method thereof
  • Powder coating polyester resin for exhaust pipe of motor vehicle and preparation method thereof
  • Powder coating polyester resin for exhaust pipe of motor vehicle and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0057] A kind of powder coating polyester resin for motor vehicle exhaust pipe that the present invention proposes, its raw material comprises by weight: 54.1 parts of terephthalic acid, 32.7 parts of neopentyl glycol, 1,3-bis(2-hydroxyethyl) 11.5 parts of -5,5-dimethylhydantoin, 1.6 parts of Cyclo, 84 parts of isophthalic acid, 4.7 parts of cyclohexanedicarboxylic acid, 0.1 parts of monobutyltin oxide, 0.1 parts of triphenyl phosphite, curing Accelerator 1.5 parts.

[0058] The present invention also proposes a method for preparing a powder coating polyester resin for motor vehicle exhaust pipes, comprising the steps of:

[0059] S1. Feeding: Put neopentyl glycol into the reaction kettle, stir, heat, and melt until the temperature of the material is greater than 60°C, and slowly add terephthalic acid, Cyclo and monobutyltin oxide;

[0060] S2. Heating esterification: During esterification, the temperature at the top of the tower is controlled to be ≤102°C, and the temperatur...

Embodiment 2

[0065] A kind of powder coating polyester resin for motor vehicle exhaust pipe that the present invention proposes, its raw material comprises by weight: 51.5 parts of terephthalic acid, 26.3 parts of neopentyl glycol, 1,3-bis(2-hydroxyethyl) 20.4 parts of -5,5-dimethylhydantoin, 1.5 parts of Cyclo, 8.0 parts of isophthalic acid, 4.4 parts of cyclohexanedicarboxylic acid, 0.1 parts of monobutyl tin oxide, 0.1 parts of triphenyl phosphite, curing Accelerator 1.5 parts.

[0066] The present invention also proposes a method for preparing a powder coating polyester resin for motor vehicle exhaust pipes, comprising the steps of:

[0067] S1. Feeding: Put neopentyl glycol into the reaction kettle, stir, heat, and melt until the temperature of the material is greater than 60°C, and slowly add terephthalic acid, branched components and catalysts;

[0068] S2. Heating esterification: During esterification, the temperature at the top of the tower is controlled to be ≤102°C, and the tem...

Embodiment 3

[0073] The present invention proposes a powder coating polyester resin for motor vehicle exhaust pipes, which has the following raw materials in parts by mass: 53.9 parts of terephthalic acid, 31.8 parts of neopentyl glycol, 1,3-bis(2-hydroxyethyl)- 11.4 parts of 5,5-dimethylhydantoin, 2.6 parts of Cyclic acid, 8.3 parts of isophthalic acid, 4.7 parts of cyclohexanedicarboxylic acid, 0.1 part of monobutyltin oxide, 0.1 part of triphenyl phosphite, curing accelerator 1.5 parts.

[0074] The present invention proposes also a kind of preparation method of powder coating polyester resin for motor vehicle exhaust pipe, comprises the following steps:

[0075] S1. Feeding: Put neopentyl glycol into the reaction kettle, stir, heat, and melt until the temperature of the material is greater than 60°C, and slowly add terephthalic acid, Cyclo and monobutyltin oxide;

[0076] S2. Heating esterification: During esterification, the temperature at the top of the tower is controlled to be ≤10...

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Abstract

The invention provides powder coating polyester resin for an exhaust pipe of a motor vehicle. The powder coating polyester resin is prepared from the following raw materials: dicarboxylic acid, dihydric alcohol, a branching component, an esterification and polycondensation catalyst, an antioxidant and a curing accelerator. The powder coating polyester resin is prepared by carrying out feeding andstirring, carrying out heating and fusing, carrying out heating and esterifying, adding acid for end capping, carrying out vacuum polycondensation, carrying out cooling and adding the auxiliaries so as to obtain a finished product of the resin. According to the powder coating polyester resin, a powder coating prepared from the polyester resin has relatively high glass transition temperature, so that polyester and the powder coating have very excellent storage stability, the prepared polyester powder coating has excellent weather resistance and temperature resistance, temperature-resistant monomers of bis-hydroxyethyl hydantoin and 1,3,5-tris(2-hydroxyethyl)cyanuric acid with three functional groups are adopted, so that the temperature resistance and the weather resistance of the polyesterpowder coating are greatly improved through the synergistic effect of the two monomers, light lose is basically avoided at the temperature of 350 DEG C / 2 h, and relatively good adhesive force and impact performance are achieved.

Description

technical field [0001] The invention relates to the technical field of powder coating preparation, in particular to a powder coating polyester resin for motor vehicle exhaust pipes and a preparation method thereof. Background technique [0002] With the progress of society and the improvement of people's living standards, there are more and more motor vehicles. In outdoor conditions, the sun and rain will definitely cause rust and corrosion to the exhaust pipes of motor vehicles. Therefore, the exhaust pipes of motor vehicles Coating and protection are becoming more and more important. Generally speaking, when the exhaust gas of a motor vehicle reaches the exhaust pipe, the temperature reaches 200-300°C, so this requires the coating to withstand high temperatures for a long time and have good weather resistance. [0003] Powder coating is a new type of coating that is coated in powder form and solidified by baking, melting, leveling, and film formation. The international "...

Claims

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Application Information

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IPC IPC(8): C09D167/00C09D5/03C09D7/61C09D7/63C08G63/685C08G63/85
CPCC08G63/6854C08G63/85C08K2003/2241C08K2003/3045C08L2201/08C09D5/033C09D5/18C09D167/00C08L63/00C08K3/22C08K3/30C08K5/07
Inventor 孙杰风许国徽褚海涛
Owner ZHEJIANG GUANGHUA NEW MATERIALS
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