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Polytetrafluoroethylene modified epoxy resin powder paint

An epoxy resin powder, polytetrafluoroethylene technology, used in the field of powder coatings, can solve the problems of low weather resistance and heat resistance, unsatisfactory water resistance, poor aging resistance, etc., to improve water resistance, reduce Mobility, fast curing effect

Inactive Publication Date: 2016-02-10
安徽圣德建材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to its excellent adhesion, corrosion resistance, hardness, flexibility and impact strength, epoxy resin is the first type of application in thermosetting powder coatings. It has been widely used in household appliances, vehicles, hardware machinery and other fields, but Due to the presence of aromatic ether groups in the epoxy resin coating, it is extremely sensitive to ultraviolet rays, so that its weather resistance and heat resistance are not high, and its aging resistance is not good. It is easy to yellow and powder during baking or sunlight exposure. , affects the gloss, and the decoration becomes poor. In addition, with the development of society, people have put forward higher requirements for the performance of epoxy resin powder coatings. The water resistance of the existing epoxy resin powder coatings can no longer meet the high-speed The requirements of the developing society need to be modified

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A kind of polytetrafluoroethylene modified epoxy resin powder coating that the present invention proposes, its raw material comprises the following components by weight: 80 parts of epoxy resins, 15 parts of modified polytetrafluoroethylenes, 20 parts of organosilicon resins, phenolic resin 2 parts of resin, 0.8 parts of tetramethylthiourea, 2 parts of polyethylene wax, 5 parts of glycerol, 3 parts of nano-zinc oxide, 10 parts of fumed silica, 2 parts of attapulgite, 12 parts of talcum powder, titanium dioxide 2 parts, 2 parts of 2-phenylimidazole, 2 parts of toluene diisocyanate, 1 part of leveling agent;

[0017] Wherein, the modified polytetrafluoroethylene is prepared according to the following process: put 100 parts of polytetrafluoroethylene ultrafine powder into a 60Co radiation source under aerobic conditions for pre-irradiation according to parts by weight, and after the absorbed dose is 35kGy Take it out, put it into the reaction device, then add 25 parts of s...

Embodiment 2

[0019] A kind of polytetrafluoroethylene modified epoxy resin powder coating that the present invention proposes, its raw material comprises the following components by weight: 50 parts of epoxy resins, 30 parts of modified polytetrafluoroethylenes, 5 parts of organosilicon resins, phenolic resin 5 parts of resin, 0.2 parts of tetramethylthiourea, 4 parts of polyethylene wax, 1 part of glycerin, 10 parts of nano-zinc oxide, 3 parts of fumed silica, 9 parts of attapulgite, 3 parts of talc, titanium dioxide 10 parts, 0.5 parts of 2-phenylimidazole, 3.5 parts of toluene diisocyanate, 0.2 parts of leveling agent;

[0020] Wherein, the modified polytetrafluoroethylene is prepared according to the following process: put 100 parts of polytetrafluoroethylene ultrafine powder into a 60Co radiation source under aerobic conditions for pre-irradiation according to parts by weight, and after the absorbed dose is 45kGy Take it out, put it into the reaction device, then add 10 parts of styre...

Embodiment 3

[0022] A kind of polytetrafluoroethylene modified epoxy resin powder coating that the present invention proposes, its raw material comprises the following components by weight: 65 parts of epoxy resins, 25 parts of modified polytetrafluoroethylenes, 12 parts of silicone resins, phenolic resin 3.6 parts of resin, 0.5 parts of tetramethylthiourea, 3.6 parts of polyethylene wax, 3.2 parts of glycerol, 8.5 parts of nano-zinc oxide, 6 parts of fumed silica, 8 parts of attapulgite, 8 parts of talcum powder, titanium dioxide 8.8 parts, 1 part of 2-phenylimidazole, 3.2 parts of toluene diisocyanate, 0.5 parts of leveling agent;

[0023] Wherein, the epoxy value of described epoxy resin is 0.42;

[0024] Preferably, the average particle diameter of the nano zinc oxide is 30nm; the average particle diameter of the fumed silica is 40nm;

[0025] The modified polytetrafluoroethylene is prepared according to the following process: put 100 parts of polytetrafluoroethylene ultrafine powder ...

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Abstract

The invention discloses polytetrafluoroethylene modified epoxy resin powder paint. Raw materials of the paint include: epoxy resin, modified polytetrafluoroethylene, organic silicon resin, phenolic resin, tetramethylthiourea, polyethylene wax, glycerol, nano-zinc oxide, fumed silica, attapulgite, talcum powder, titanium dioxide, 2-phenylimidazole, toluene diisocynate and flatting agents. The modified polytetrafluoroethylene is prepared according to the following process: polytetrafluoroethylene ultrafine powder is placed in a 60 Co radioactive source for pre-irradiation under an aerobic condition and taken out after the absorbed dose is between 35 kGy and 45 kGy; next, styrene, vinyl triethoxy silane, 4-vinylpyridine and absolute methanol are added, and the mixture is subjected to ultrasonic oscillation and then temperature rise reaction under the protection of nitrogen; after reaction is over, washing and drying are performed to obtain the modified polytetrafluoroethylene. The polytetrafluoroethylene modified epoxy resin powder paint is good in weather fastness and ageing resistance, excellent in water resistance and corrosion resistance, good in decorative performance and long in service life.

Description

technical field [0001] The invention relates to the technical field of powder coatings, in particular to a polytetrafluoroethylene modified epoxy resin powder coating. Background technique [0002] Powder coating is a new type of solvent-free, 100% solid powder coating, which has the characteristics of no solvent, no pollution, recyclable, environmental protection, saving energy and resources, reducing labor intensity, and high mechanical strength of the coating film. It is divided into thermoplastic powder Coatings and thermosetting powder coatings. Due to its excellent adhesion, corrosion resistance, hardness, flexibility and impact strength, epoxy resin is the first type of application in thermosetting powder coatings. It has been widely used in household appliances, vehicles, hardware machinery and other fields, but Due to the presence of aromatic ether groups in the epoxy resin coating, it is extremely sensitive to ultraviolet rays, so that its weather resistance and h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D151/00C09D183/04C09D161/06C09D123/06C09D5/03C09D7/12C08F259/08C08F212/08C08F230/08C08F226/06
Inventor 邱华岭
Owner 安徽圣德建材科技有限公司
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