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Tri-block hybrid fluorosilicone polymer and preparation method thereof

A fluorosilicone polymer and tri-block technology, applied in coatings and other directions, can solve problems such as large expansion coefficient and unsatisfactory surface energy, and achieve good adhesion and excellent surface inertness

Active Publication Date: 2019-07-05
无锡龙驰氟硅新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention proposes a tri-block hybrid fluorosilicon polymer, which can solve the problem that the organic silicon coating has a large expansion coefficient in organic solvents and combustion oils, and the surface energy is not ideal.

Method used

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  • Tri-block hybrid fluorosilicone polymer and preparation method thereof
  • Tri-block hybrid fluorosilicone polymer and preparation method thereof
  • Tri-block hybrid fluorosilicone polymer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 50 parts of hydroxyl-terminated perfluoropolyether, 2 parts of isophorone isocyanate, 0.1 part of 2-hydroxy-2-methyl-1-phenyl-1-acetone, and 0.02 part of dibutyltin dilaurate are dissolved in the first part of acetone solvent (60 parts), add it to the reaction kettle, and react at a constant temperature of 80°C for a period of time. After the temperature drops to 60°C, quickly add the mixed solution of 50 parts of silane vinyl monomer and the second part of acetone solvent (40 parts), and pass through nitrogen gas After a period of time, photopolymerization is carried out under the irradiation of ultraviolet rays, etc., and the triblock hybrid fluorosilicone polymer is obtained as follows:

[0026]

[0027] After it is cured with KH550, the coating properties with good adhesion to PET film can be obtained as follows:

[0028]

Embodiment 2

[0030] 50 parts of hydroxyl-terminated VDF-HFP rubber, 3 parts of hexamethylene isocyanate, 0.6 part of 2-hydroxy-2-methyl-1-phenyl-1-acetone, 0.1 part of dibutyltin dilaurate are dissolved in the first part of ethyl acetate Add the ester solvent (50 parts) into the reaction kettle, and react at a constant temperature of 80°C for a period of time. After dropping to 60°C, quickly add the mixed solution of 50 parts of silane vinyl monomer and the second part of acetone solvent (50 parts), and pass through After entering nitrogen for a period of time, photopolymerization is carried out under the irradiation of ultraviolet light, etc., and the triblock hybrid fluorosilicon polymer is obtained as follows:

[0031]

[0032] Using AF and KH550 for dual curing, the properties obtained are as follows

[0033]

Embodiment 3

[0035] 50 parts of hydroxyl-terminated perfluoropolyether, 2 parts of isophorone isocyanate, 0.1 part of 2-hydroxy-2-methyl-1-phenyl-1-acetone, and 0.02 part of dibutyltin dilaurate are dissolved in the first part of acetone solvent (60 parts), add it to the reaction kettle, and react at a constant temperature of 80°C for a period of time. After dropping to 60°C, quickly add the mixed solution of 50 parts of fluorine-containing vinyl silane monomer and the second part of acetone solvent (40 parts), After passing nitrogen gas for a period of time, the photopolymerization reaction is carried out under the irradiation of ultraviolet light, etc., and the triblock hybrid fluorosilicon polymer is obtained as follows:

[0036]

[0037] Compared with Example 1, the surface was reduced to 9 mN / m due to the introduction of fluorine-containing vinyl silane. Its performance is as follows:

[0038]

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Abstract

The invention discloses a triblock hybrid fluorosilicone polymer. The triblock hybrid fluorosilicone polymer is characterized in that the structural formula of the triblock hybrid fluorosilicone polymer is as shown in the description, wherein Rf is a fluorine-containing chain segment, Rsi is a silicone-containing chain segment, and R1 is an isolating radical between two NCOs in isocyanate. The prepared triblock hybrid fluorosilicone coating has good adhesive force and excellent surface inertia after being cured, and can be used as either an ultra-light release agent or a ship protective coating.

Description

technical field [0001] The invention relates to the technical field of polymer compounds, in particular to a triblock hybrid fluorosilicon polymer and a preparation method thereof. Background technique [0002] Silicone coating has many unique properties, such as weather resistance, aging resistance, ozone resistance, water repellency, flame retardant, etc. These excellent properties are incomparable and replaceable by other organic polymer coatings. Therefore, silicone coatings have been widely used in aerospace, electronics, chemical textiles, medical and health, mechanical construction and other fields. However, the silicone coating has a large swelling degree in organic solvents, combustion oil, and lubricating oil. In addition, although the surface energy of the silicone coating is already very small, 21-22mN / m, it is still not ideal. These all greatly limit the application of silicone coating. At present, the most effective method is to introduce fluorine-containing...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F293/00C08F230/08C08F2/48C08G18/75C08G18/73C08G18/62C09D153/00C09D5/20
CPCC08F2/48C08F230/08C08F293/00C08G18/6279C08G18/73C08G18/755C09D5/20C09D153/00
Inventor 白永平王宇张晓勇李卫东席丹殷晓芬
Owner 无锡龙驰氟硅新材料有限公司
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