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Polyester type high-temperature-resistant powder coating

A powder coating, high temperature resistant technology, applied in powder coatings, polyester coatings, fire retardant coatings, etc., can solve the problems of easy discoloration, poor weather resistance and easy peeling of the coating film

Inactive Publication Date: 2020-10-20
ANHUI SHUNBANG FINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to provide a polyester-type high-temperature-resistant powder coating. When designing the powder coating, the polyester resin is improved so that it has high heat resistance and rigidity, and can achieve a service temperature above 220°C. Good performance, which effectively solves the problems of easy discoloration, easy peeling off and poor weather resistance of the coating film under high temperature conditions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A polyester type high temperature resistant powder coating, the preparation method specifically comprises the following steps:

[0018] Step 1: The modified polyester resin is made of the following components in parts by weight: 2.0 parts of 2-butyl-2 ethyl-1,3-propanediol, 16 parts of neopentyl glycol, 0.08 parts of trimethylolpropane, 1.4 parts of isophthalic acid, 13 parts of terephthalic acid, 0.8 parts of trimellitic anhydride, 1.5 parts of adipic acid, 0.4 parts of triphenyl phosphite, and 1.0 parts of tetraisopropyl titanate. The agent is modified, and the specific preparation method is as follows:

[0019] Weigh 2-butyl-2 ethyl-1,3-propanediol, neopentyl glycol, trimethylolpropane, isophthalic acid, terephthalic acid, adipic acid, tetratitanate Isopropyl ester is placed in a four-necked flask equipped with a stirrer, reflux condenser, and water separator, and nitrogen is introduced, and the temperature is raised to 180°C at a rate of 2.5°C / min, and the condense...

Embodiment 2

[0030] A polyester type high temperature resistant powder coating, the preparation method specifically comprises the following steps:

[0031] Step 1: The modified polyester resin is made of the following components in parts by weight: 2.1 parts of 2-butyl-2 ethyl-1,3-propanediol, 17 parts of neopentyl glycol, 0.09 parts of trimethylolpropane, 1.5 parts of isophthalic acid, 14 parts of terephthalic acid, 0.85 parts of trimellitic anhydride, 1.6 parts of adipic acid, 0.5 parts of triphenyl phosphite, and 1.3 parts of tetraisopropyl titanate. The agent is modified, and the specific preparation method is as follows:

[0032] Weigh 2-butyl-2 ethyl-1,3-propanediol, neopentyl glycol, trimethylolpropane, isophthalic acid, terephthalic acid, adipic acid, tetratitanate Isopropyl ester is placed in a four-necked flask equipped with a stirrer, reflux condenser, and water separator, and nitrogen is introduced, and the temperature is raised to 185°C at a rate of 2.8°C / min, and the condens...

Embodiment 3

[0043] A polyester type high temperature resistant powder coating, the preparation method specifically comprises the following steps:

[0044] Step 1: The modified polyester resin is made of the following components in parts by weight: 2.2 parts of 2-butyl-2 ethyl-1,3-propanediol, 19 parts of neopentyl glycol, 0.1 part of trimethylolpropane, 1.6 parts of isophthalic acid, 16 parts of terephthalic acid, 0.9 parts of trimellitic anhydride, 1.8 parts of adipic acid, 0.6 parts of triphenyl phosphite, and 1.5 parts of tetraisopropyl titanate. The agent is modified, and the specific preparation method is as follows:

[0045] Weigh 2-butyl-2 ethyl-1,3-propanediol, neopentyl glycol, trimethylolpropane, isophthalic acid, terephthalic acid, adipic acid, tetratitanate Isopropyl ester is placed in a four-necked flask equipped with a stirrer, a reflux condenser, and a water separator. Nitrogen is introduced, and the temperature is raised to 190°C at a rate of 3.0°C / min. The condensed wate...

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Abstract

The invention relates to a polyester type high-temperature-resistant powder coating. According to the invention, the preparation formula of the traditional polyester resin and the synthesis conditionsof reaction temperature, reaction time, additive addition and the like in the preparation process are changed; the physical and chemical properties of the prepared modified polyester resin are completely different from those of conventional polyester resin, the acid value of the prepared modified polyester resin is 69-79 mgKOH / g, the viscosity is 32-37 P / DEG C, the glass-transition temperature and decomposition temperature are increased, and the prepared modified polyester resin has good stability and heat resistance. The prepared powder coating is good in storage stability, not prone to agglomeration, beneficial to electrostatic spraying construction, good in film mechanical property and high in coating performance, the problem that a polyester resin system is poor in thermal stability is effectively solved, the mechanical property of a coating film is improved, and the effects of remarkably improving heat resistance, enhancing and toughening are achieved. The method is suitable forbatch production, the production cost of enterprises is greatly reduced, more economic benefits and social benefits are brought, and the method has very wide application prospects.

Description

technical field [0001] The invention relates to the technical field of coating preparation, in particular to a polyester type high temperature resistant powder coating. Background technique [0002] As an important role in industrial applications, the coating industry has always played an important role. For a long time, coatings exist in the form of solutions and are diluted with organic solvents. Not only is there a waste of raw materials, but it also has adverse effects on humans and the environment. In recent years, the development of powder coatings is very rapid, and its energy saving and pollution-free are loved by people. Powder coating is a new type of coating that is completely free of organic solvents and is coated in powder form, and is formed into a film after high-temperature melting, leveling, and curing. Powder coating is a solid powder synthetic resin coating composed of solid resin and pigments, fillers and additives. It is different from ordinary solvent-...

Claims

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Application Information

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IPC IPC(8): C09D167/02C09D5/03C09D7/61C09D7/65C09D7/63C09D7/62C08G63/20C08G63/78
CPCC08G63/20C08G63/78C08K2003/2241C08K2003/265C08L2201/08C09D5/033C09D5/18C09D167/02C08L83/04C08K13/06C08K9/04C08K9/02C08K3/26C08K3/34C08K3/22C08K3/36C08K5/098
Inventor 苗雪峰
Owner ANHUI SHUNBANG FINE CHEM
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