Polyester resin for high filling mark covering powder paint and preparation method thereof

A polyester resin and powder coating technology, applied in powder coatings, polyester coatings, coatings, etc., can solve the problems of increased equipment loss, prolonged process, increased maintenance requirements, etc., to prevent oxidation side reactions and achieve excellent surface performance. , the effect of increasing the conversion rate

Inactive Publication Date: 2018-05-15
ZHEJIANG GUANGHUA NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, various manufacturers have realized that the amount of single-piece paint used in painting has increased, equipment loss has increased, mai

Method used

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  • Polyester resin for high filling mark covering powder paint and preparation method thereof
  • Polyester resin for high filling mark covering powder paint and preparation method thereof
  • Polyester resin for high filling mark covering powder paint and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0039] Example 1:

[0040] A polyester resin for high filling and shading powder coatings is made with the following parts by weight:

[0041]

[0042] Among them, the branching agent is trimethylolpropane. The esterification catalyst is a mixture of dibutyltin oxide and monobutyltin oxide, and the mass ratio of the two is 1:1.5. The curing accelerator is a mixture of tetrabutylammonium chloride and ethyltriphenylphosphonium bromide, and the mass ratio of the two is 1:1. The antioxidant is a mixture of antioxidant 3114 and antioxidant 168, and the mass ratio of the two is 2:1.

[0043] The preparation method of the above-mentioned polyester resin for high filling and shading powder coatings, the specific steps are as follows:

[0044] (1) Add neopentyl glycol, pentaerythritol, 1,4-cyclohexanedicarboxylic acid, branching agent and esterification catalyst to the reactor containing the water-containing agent in sequence, continue to pass nitrogen, and heat to 240°C. Stir the reaction ...

Example Embodiment

[0052] Example 2:

[0053] A polyester resin for high filling and shading powder coatings is made with the following parts by weight:

[0054]

[0055] Among them, the branching agent is trimethylolethane. The esterification catalyst is a mixture of dibutyltin oxide and monobutyltin oxide, and the mass ratio of the two is 1:1.5. The curing accelerator is a mixture of tetrabutylammonium chloride and ethyltriphenylphosphonium bromide, and the mass ratio of the two is 1:1. The antioxidant is a mixture of antioxidant 3114 and antioxidant 168, and the mass ratio of the two is 2:1.

[0056] The preparation method of the above-mentioned polyester resin for high filling and shading powder coatings, the specific steps are as follows:

[0057] (1) Add neopentyl glycol, pentaerythritol, 1,4-cyclohexanedicarboxylic acid, branching agent and esterification catalyst to the reactor containing the water-containing agent in sequence, continue to pass nitrogen, and heat to 250°C. Stir the reaction u...

Example Embodiment

[0065] Example 3:

[0066] A polyester resin for high filling and shading powder coatings is made with the following parts by weight:

[0067]

[0068] Among them, the branching agent is pentaerythritol. The esterification catalyst is a mixture of dibutyltin oxide and monobutyltin oxide, and the mass ratio of the two is 1:1.5. The curing accelerator is a mixture of tetrabutylammonium chloride and ethyltriphenylphosphonium bromide, and the mass ratio of the two is 1:1. The antioxidant is a mixture of antioxidant 3114 and antioxidant 168, and the mass ratio of the two is 2:1.

[0069] The preparation method of the above-mentioned polyester resin for high filling and shading powder coatings, the specific steps are as follows:

[0070] (1) Add neopentyl glycol, pentaerythritol, 1,4-cyclohexanedicarboxylic acid, branching agent, and esterification catalyst to the reactor containing the water agent in sequence, continue to pass nitrogen, and heat to 250°C. Stir the reaction until the rea...

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Abstract

The invention discloses polyester resin for high filling mark covering powder paint and a preparation method thereof. Neopentyl glycol, pentaerythritol, terephthalic acid, m-phthalic acid and 1,4-cyclohexanedicarboxylic acid are used as raw materials to be prepared into the polyester resin through esterification polymerization. The powder paint prepared by the polyester resin has excellent film coating performance, is particularly applicable to the field of automobile hubs and the like, and has high filling mark covering performance; good surface levelling property, hardness, adhesive force, salt spray resistance, light resistance and aging resistance are realized.

Description

technical field [0001] The invention relates to a polyester resin, in particular to a polyester resin for high-filling and concealing powder coatings. The invention belongs to the technical field of powder coating. Background technique [0002] Powder coating is a green coating produced without volatile organic solvents. Because of its characteristics of resource saving, solvent-free, low pollution, high efficiency, one-time coating molding, and wide application fields, it has developed rapidly in all countries in the world. Especially since entering the 21st century, environmental protection requirements have driven its rapid development even more. Energy-saving, low-pollution environmentally friendly powder coatings have always been in an important position in development. [0003] About 80% of the thermosetting powder coating market uses polyester resin as the main film-forming substance. The polyester resin market for wheels in the Chinese market used to be in a state...

Claims

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Application Information

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IPC IPC(8): C08G63/20C08G63/85C09D167/02C09D5/03
CPCC08G63/20C08G63/85C09D5/03C09D167/02
Inventor 祝一平
Owner ZHEJIANG GUANGHUA NEW MATERIALS
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