Fluoroelastomer coating with high fluorine content and low-temperature solidification

A technology of fluoroelastomer and fluorine content, applied in the direction of coating, etc., can solve the problems of consumption, difficulty in realization and popularization and application, etc., and achieve the effects of expanding application range, simplifying construction conditions and processes, and excellent high temperature resistance

Inactive Publication Date: 2010-03-03
胡小林 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High temperature curing crosslinking, this method is difficult to realize and popularize in construction
In addition, high-temperature curing means that more energy is consumed and more toxic cross-linked by-products are formed, which deviates from the country's basic national policy of energy conservation and emission reduction.

Method used

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  • Fluoroelastomer coating with high fluorine content and low-temperature solidification
  • Fluoroelastomer coating with high fluorine content and low-temperature solidification
  • Fluoroelastomer coating with high fluorine content and low-temperature solidification

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Mix 100 grams of vinylidene fluoride, hexafluoropropylene copolymer elastomer (molecular weight: 120,000) with 5 grams of carbon black and silica reinforcing agent, and dissolve in a mixture of 550 grams of acetone, butanone and ethyl acetate ( Volume ratio 1:2:1). Stir at room temperature for 2 hours, gradually add 10 g of curing catalyst bisphenol F dropwise, and continue stirring for 2 hours. Then sieve (200 mesh), adopt spraying method to coat, and cure at room temperature for 48 hours. According to the requirements of the national standard, it was sprayed into various samples for performance testing, and the results are shown in the table below:

[0039] Performance Testing

[0040]

Embodiment 2

[0042] Mix 100 grams of vinylidene fluoride, hexafluoropropylene copolymer elastomer (molecular weight: 120,000) with 5 grams of carbon black and silica reinforcing agent, and dissolve in a mixture of 550 grams of acetone, butanone and ethyl acetate ( Volume ratio 1:2:1). Stir at room temperature for 2 hours, gradually add 10 g of curing catalyst bisphenol F dropwise, and continue stirring for 2 hours. Then it was sieved (200 mesh), painted by spraying method, and cured at 100°C for 4 hours. According to the requirements of the national standard, it was sprayed into various samples for performance testing, and the results are shown in the table below:

[0043] Performance Testing

[0044]

Embodiment 3

[0046] Mix 100 grams of vinylidene fluoride, hexafluoropropylene copolymer elastomer (molecular weight: 200,000) with 5 grams of carbon black and silica reinforcing agent, and dissolve in a mixture of 550 grams of acetone, butanone and ethyl acetate ( Volume ratio 1:2:1). Stir at room temperature for 2 hours, gradually add 10 g of curing catalyst bisphenol F dropwise, and continue stirring for 2 hours. Then sieve (200 mesh), adopt spraying method to coat, and cure at room temperature for 48 hours. According to the requirements of the national standard, it was sprayed into various samples for performance testing, and the results are shown in the table below:

[0047] Performance Testing

[0048]

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Abstract

The invention belongs to the technical field of coating, and particularly relates to fluoroelastomer coating with high fluorine content and low-temperature solidification. The coating adopts mixture formed by one or more than one of vinylidene fluoride, trifluorochlor oethylene, tetrafluoroethylene, hexafluoropropylene, alkenyl ether fluoride and hexafluoroether as the initial raw material, the initial raw material is dissolved in a proper solvent or aqueous solution, and the fluoroelastomer coating which has good fluidity and coating performance and can be solidified in low temperature solidification under the effect of a specified solidifying agent is obtained. Compared with the common fluorocarbon coating, the coating with high fluorine content (35 to 75 percent) has more excellent high-temperature resistance, chemical medium and weather resistance, can realize crosslinking, solidification and forming of fluoroelastomer molecules under the conditions of lower temperature and shortertime, and simplify conditions and techniques and construction, thus leading the large-area outdoor (field) coating to be possible and greatly expanding the application range of the fluorine material.

Description

technical field [0001] The invention relates to a fluoroelastomer coating with high fluorine content and low-temperature curing, especially a fluoroelastomer coating based on vinylidene fluoride, tetrafluoroethylene and hexafluoropropylene copolymer. The invention also relates to the preparation method and method of the coating application. Background technique [0002] Due to the high bond energy and low polarizability of the C-F bond in the molecule, fluorine materials have excellent high temperature resistance, chemical medium resistance, water and oil resistance, and are widely used in aerospace, petrochemical, pharmaceutical, electric power, and energy fields. Although fluorine materials have the above advantages, difficulty in processing has always been a difficulty in the promotion of fluorine materials. For example, tetrafluoro compounds are insoluble in conventional solvents, and as coatings, they must be sintered to form thin polymers. Difficult to popularize and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D127/16C09D127/12C09D127/18C09D127/20C09D123/14C09D129/10C09D7/12
Inventor 胡小林胡吉姜辉
Owner 胡小林
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