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Polyester resin for indoor powder coating and preparation method of polyester resin

A powder coating, polyester resin technology, applied in powder coatings, polyester coatings, coatings, etc., can solve the problem that the physical and mechanical properties and chemical resistance of the coating film are not ideal, there is not enough leveling time, and the leveling of the coating film is not enough. Good physical and mechanical properties and chemical resistance, good adhesion and good leveling

Inactive Publication Date: 2019-04-26
YANGZHOU XINBAO RESIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the polyester resin used for indoor powder coatings on the market has a large molecular weight and high viscosity, resulting in insufficient leveling time when the powder coating melts, poor leveling of the coating film, low gloss, poor physical and mechanical properties and durability of the coating film. Disadvantages such as unsatisfactory chemical performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A polyester resin for indoor powder coatings, comprising the following raw materials by mass percentage: 4% neopentyl glycol, 14% ethylene glycol, 15% diethylene glycol, 0.7% trimethylolpropane, 65% terephthalic acid, 0.4% isophthalic acid, 0.4% trimellitic anhydride, 0.1% monobutyltin oxide and 0.4% 18 / 16 tertiary amine.

[0017] Its preparation method comprises the following steps:

[0018] (1) The temperature of the reactor is raised to 80° C., the rotating speed of the stirring paddle is adjusted to 30 rpm, and 4% neopentyl glycol, 14% ethylene glycol, 15% diethylene glycol, and 0.7% trimethylol Propane, 65% terephthalic acid, 0.4% isophthalic acid, and 0.1% monobutyltin oxide are put into the reactor;

[0019] (2) The rotating speed of the stirring paddle is adjusted to 45rpm, the temperature of the reactor is raised to 240°C at a heating rate of 2°C / 15min, and the reaction is carried out at 240°C for 110min;

[0020] (3) Carry out polycondensation reaction 50min...

Embodiment 2

[0023] A polyester resin for indoor powder coatings, comprising the following raw materials by mass percentage: 4% neopentyl glycol, 14% ethylene glycol, 15% diethylene glycol, 0.4% trimethylolpropane, 65% terephthalic acid, 0.5% isophthalic acid, 0.5% trimellitic anhydride, 0.1% monobutyltin oxide and 0.5% 18 / 16 tertiary amine.

[0024] Its preparation method comprises the following steps:

[0025] (1) The temperature of the reactor is raised to 80° C., the rotating speed of the stirring paddle is adjusted to 30 rpm, and 4% neopentyl glycol, 14% ethylene glycol, 15% diethylene glycol, and 0.4% trimethylol are Propane, 65% terephthalic acid, 0.5% isophthalic acid, and 0.1% monobutyltin oxide are put into the reactor;

[0026] (2) The rotating speed of the stirring paddle is adjusted to 45rpm, the temperature of the reactor is raised to 240°C at a heating rate of 3°C / 15min, and the reaction is carried out at 240°C for 120min;

[0027] (3) Carry out polycondensation reaction 6...

Embodiment 3

[0030] A polyester resin for indoor powder coatings, comprising the following raw materials by mass percentage: 4% neopentyl glycol, 14% ethylene glycol, 15% diethylene glycol, 0.8% trimethylolpropane, 65% terephthalic acid, 0.5% isophthalic acid, 0.3% trimellitic anhydride, 0.1% monobutyltin oxide and 0.3% 18 / 16 tertiary amine.

[0031] Its preparation method comprises the following steps:

[0032] (1) The temperature of the reactor is raised to 80° C., the rotating speed of the stirring paddle is adjusted to 30 rpm, and 4% neopentyl glycol, 14% ethylene glycol, 15% diethylene glycol, and 0.8% trimethylol Propane, 65% terephthalic acid, 0.5% isophthalic acid, and 0.1% monobutyltin oxide are put into the reactor;

[0033] (2) The rotating speed of the stirring paddle is adjusted to 45rpm, the temperature of the reactor is raised to 240°C at a heating rate of 2°C / 15min, and the reaction is carried out at 240°C for 100min;

[0034] (3) Carry out polycondensation reaction 40min...

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PUM

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Abstract

The invention relates to the technical field of powder coatings, in particular to polyester resin for an indoor powder coating and a preparation method of the polyester resin. The powder coating prepared from the polyester resin for the indoor powder coating with high levelling property and high gloss has the following characteristics: 1, the melt viscosity is low during melt leveling, so that thepowder coating has sufficient leveling time, good film leveling property and high gloss; 2, adhesion to a coated object is good, and base coat is not needed; 3, the preparation range of the coating is wide, and coatings with different performance requirements and curing speeds can be prepared; 4, a film has good physical mechanical properties and chemical resistance.

Description

technical field [0001] The invention relates to the technical field of powder coatings, in particular to a polyester resin for indoor powder coatings and a preparation method thereof. Background technique [0002] Powder coating is a new type of solvent-free 100% solid powder environment-friendly coating. It has the advantages of high coating efficiency, good protection and decorative performance, and has received extensive attention from all over the world, thus achieving sustained and rapid development. It is mainly used in home appliances, metal furniture, medical equipment, auto parts, construction aluminum profiles and other fields. [0003] At present, the polyester resin used for indoor powder coatings on the market has a large molecular weight and high viscosity, resulting in insufficient leveling time when the powder coating melts, poor leveling of the coating film, low gloss, poor physical and mechanical properties and durability of the coating film. Chemical perf...

Claims

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Application Information

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IPC IPC(8): C09D167/02C09D5/03C08G63/672C08G63/78
CPCC08G63/672C08G63/78C09D5/03C09D167/02
Inventor 张爱东倪燕周立文夏金士
Owner YANGZHOU XINBAO RESIN
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