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Epoxy polysiloxane graphene heavy-duty anticorrosion coating and preparation method

A technology of epoxy polysiloxane and graphene, which is applied in the direction of anti-corrosion coatings, epoxy resin coatings, coatings, etc., can solve the problems of affecting the anti-corrosion effect of epoxy resin, easy coating of coatings, and poor weather resistance, etc., to achieve Excellent leveling performance, stable price, and low overall cost

Active Publication Date: 2016-08-17
WUHAN HOSTS COATING MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Normal temperature outdoor heavy-duty anti-corrosion / long-life dual-performance coatings have fewer formulations and are difficult to popularize under outdoor coating conditions
The main reason is that the epoxy resin has a benzene ring structure, and its weather resistance is poor. Long-term exposure to ultraviolet light will cause the coating to be prone to powdering and foaming, which greatly affects the outdoor anti-corrosion effect of the epoxy resin.

Method used

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  • Epoxy polysiloxane graphene heavy-duty anticorrosion coating and preparation method

Examples

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Effect test

Embodiment 1

[0033] A kind of epoxy polysiloxane graphene heavy anticorrosion coating, its preparation steps are as follows:

[0034] (1) Synthesis of epoxy polysiloxane: 48g of hydrogenated bisphenol A epoxy resin and 52g of methoxypolysiloxane were added to a nitrogen-filled reactor, the temperature was raised to 70°C, and 0.1g of dilauric acid dilaurate was added dropwise. Butyl tin; then slowly increase the temperature to 135°C, the reaction time is 6h; cool down to 60°C, add 2g of 3-aminopropyltrimethoxysilane dropwise at the same time, continue the reaction for 2h; finally add petroleum ether for extraction, the petroleum ether layer is the sample mixture Liquid, low pressure vacuum (-0.08MPa, 40°C) to remove solvent, cooling to obtain epoxy polysiloxane.

[0035] (2) Weigh 29.0 g of hydrogenated bisphenol A epoxy resin, 10.0 g of epoxy polysiloxane of step (1) and 4.0 g of graphene according to the proportion, mix and heat to 50° C. in a water bath for dissolution to obtain a mixed ...

Embodiment 2

[0040] A kind of epoxy polysiloxane graphene heavy anticorrosion coating, its preparation steps are as follows:

[0041] (1) Synthesis of epoxy polysiloxane: Add 45g of hydrogenated bisphenol A epoxy resin and 52g of methoxy polysiloxane into a nitrogen-filled reactor, heat up to 80°C, and add 0.1g of dilauric acid dilaurate dropwise Butyl tin; then slowly raise the temperature to 125°C, the reaction time is 6h; cool down to 55°C, add 2.5g of 3-aminopropyltriethoxysilane dropwise at the same time, continue the reaction for 2h; finally add petroleum ether for extraction, the petroleum ether layer is the sample Mixed solution, low pressure vacuum (-0.08MPa, 40°C) to remove solvent, cooling to obtain epoxy polysiloxane;

[0042] (2) Weigh 30 g of hydrogenated bisphenol A epoxy resin, 10.0 g of epoxy polysiloxane of step (1) and 4.0 g of graphene according to the proportion, mix and heat to 50° C. in a water bath for dissolution to obtain a mixed resin.

[0043] (3) Add 2.0g of p...

Embodiment 3

[0047] A kind of epoxy polysiloxane graphene heavy anticorrosion coating, its preparation steps are as follows:

[0048] (1) Synthesis of epoxy polysiloxane: 60g of hydrogenated bisphenol A epoxy resin and 40g of methoxypolysiloxane were added to a nitrogen-filled reactor, the temperature was raised to 80°C, and 0.1g of dilauric acid dilaurate was added dropwise. Butyl tin; then slowly raise the temperature to 145°C, the reaction time is 5h; cool down to 60°C, add 1.5g of 3-aminopropyltrimethoxysilane dropwise at the same time, continue the reaction for 2h; add petroleum ether for extraction, and the petroleum ether layer is the sample mixture , low-pressure vacuum (-0.08MPa, 40°C) to remove the solvent, and cool to obtain epoxy polysiloxane.

[0049] (2) E-51 epoxy resin 20.0g, hydrogenated bisphenol A epoxy resin 9.0g, step (1) epoxy polysiloxane 7.0g and graphene 8.0g are called according to the proportioning, and the water bath is heated to 50 after mixing ℃ for dissoluti...

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Abstract

The invention discloses epoxy polysiloxane graphene heavy-duty anticorrosion coating, comprising component A and component B according to a weight ratio of 100:17-24; the component A includes: epoxy resin, epoxy polysiloxane and graphene; the component B includes: cashew nut shell oil-modified amine curing agent. A preparation method of this coating includes: (1), hydrogenated bisphenol A epoxy resin and epoxy polysiloxane into a reactor introduced with nitrogen, heating to 60-80 DEG C, and adding dibutyltin dilaurate; heating slowly to 125-135 DEG C, and reacting for 5-6 h; cooling to 55-60 DEG C, adding silane coupling agent, and continuing to react for 2 h; extracting with petroleum ether, and removing a solvent at 40 DEG C at low vacuum pressure of 0.08 MPa; (2), mixing the epoxy resin, the epoxy polysiloxane of step (1) and graphene, heating for dissolving, adding other materials, and mixing; the coating prepared herein has excellent properties such as aging resistance, water resistance, hardness, flexibility, and salt water resistance.

Description

technical field [0001] The invention relates to an epoxy polysiloxane graphene heavy-duty anti-corrosion coating and a preparation method thereof, belonging to the field of fine chemical coatings. Coatings are suitable for various chemical pipelines, chemical production equipment, extremely effective protection of workpieces that require corrosion resistance and heat resistance, protection of offshore platform equipment, protection of fine parts and equipment, protection of standard parts, etc. Background technique [0002] In recent years, the environment has deteriorated, resulting in acid rain, acid mist, microorganisms, etc., which have caused serious corrosion of underground pipelines, underground bridge pier infrastructure, ships, etc., and it is also very difficult to maintain. At present, compared with Europe, America and Japan, domestic technology is lacking; per capita metal resources in my country are less, but more than 20% of metals are corroded every year. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D183/10C09D5/08C09D7/12C08G77/42C08G59/50
CPCC08G59/50C08G77/42C08K2201/014C09D5/08C09D7/61C09D7/63C09D7/65C09D163/00C08L83/10C08K13/02C08K3/04C08K3/36C08K3/40C08K3/34C08K2003/2241
Inventor 李文廖龙李伟操文平张军李金程蔓莉
Owner WUHAN HOSTS COATING MATERIAL CO LTD
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