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Fluoropolymers containing organo-silanes and methods of making the same

A technology of organosilane and polymer, which is applied in the field of preparation of fluoropolymers, which can solve the problems of chemical resistance, high temperature stability, high tensile strength, low refractive index, chemical modification of fluoropolymers, and damage to beneficial properties.

Inactive Publication Date: 2002-02-20
ATOCHEM OF NORTH AMERICA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Fluoropolymers that previously had beneficial properties such as chemical resistance, high temperature stability, high tensile strength and / or low refractive index have the disadvantage that subsequent modifications such as post-crosslinking or post-chemical modification are not feasible because doing so may impair these beneficial properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] 1 gram of disodium phosphate was dissolved in 900 grams of a mixture solution of 2 / 3% by weight perfluoroalkane carboxylate in deionized water. This mixture was then added to a 2.0 liter autoclave. The closed autoclave was then heated to 80° C. and then vented to atmospheric pressure. Then, 132 ml of -6.5 °C, 650 psia liquid VF2 was added to the autoclave, and the reaction mixture was heated to 100 °C, followed by the addition of 45 ml of 3% by weight di-n-propyl peroxydicarbonate and 2 / 3% by weight all An initiator emulsion consisting of a mixture of fluoroalkane carboxylates dispersed in deionized water was used to initiate polymerization. During initiation, the pressure drops, and then the initiator emulsion is continuously added at a rate of 2 ml / min over a period of 78 minutes and VF2 and A mixture of 25% by weight vinyltri-tert-butoxysilane in methanol to maintain the pressure at 600 psia. The monomer feed was stopped and the initiator emulsion feed was maintai...

Embodiment 2

[0069] 0.5 g of trisodium phosphate was dissolved in 800 g of a mixture solution of 2 / 3% by weight perfluoroalkane carboxylate in deionized water. This mixture was then added to a 2.0 liter autoclave. The closed autoclave was then heated to 80° C. and then vented to atmospheric pressure. The temperature was raised to 90°C. Then, 123.4 ml of liquid VF2 at -6.5°C, 550 psia was added to the autoclave. Polymerization was started by adding 55 ml of an initiator emulsion consisting of a mixture of 3% by weight di-n-propyl peroxydicarbonate and 2 / 3% by weight perfluoroalkane carboxylate dispersed in deionized water. During the initiation process, the pressure first increased and then decreased, and then the initiator emulsion was continuously added at a rate of 2 ml / min, and 109.5 ml of 4.5% by weight phosphoric acid diphosphate was continuously added at a rate of 1.5 ml / min over a period of 80 minutes. A solution of sodium in deionized water and a mixture of VF2 and 25% by weight...

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PUM

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Abstract

A fluoropolymer is described which is a polymer reaction product of a fluoropolymer comprising a polymer reaction product of: a) at least one first alkylene co-monomer containing at least one fluorine atom; b) optionally at least one monomer selected from: 1) at least one second alkylene containing at least one fluorine atom; 2) at least one alkyl alkenyl ether containing at least one fluorine atom; 3) at least one aliphatic or cyclic ketone containing at least one fluorinated alpha-alpha position; or 4) non-fluorinated alkene, alkyl alkenyl ether, or alkenyl ester; and c) at least one sterically hindered alkenyl or alkenyl ether organo silane co-monomer with or without at least one fluorine substituent. The fluoropolymer can be subsequently cross-linked or further reacted. Methods of making the fluoropolymer are further disclosed as well as applications of the fluoropolymers.

Description

background of the invention [0001] The present invention relates to fluoropolymers and uses of these fluoropolymers. More specifically, the present invention relates to fluoropolymers containing organosilane functional groups. The present invention also relates to a process for the preparation of fluoropolymers. [0002] Various attempts have been made to prepare fluoropolymers for various reasons. Fluoropolymers are traditionally used in applications requiring special properties such as low surface energy, high chemical resistance, low dielectric loss or extreme demands on aging resistance. However, sometimes these unique properties are problems in themselves when working with fluoropolymers. For example, the lack of functional groups that promote adhesion to substrates, facilitate crosslinking, provide sites for subsequent chemical modification, introduce ion exchange capability, or ion conductivity severely limit the utility of conventional fluoropolymers. Thus, there i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F2/22C08F214/18C08F230/08C08G77/24C08L27/12
CPCC08F230/08C08F230/085
Inventor R·阿明-萨纳伊C·C·格雷恩
Owner ATOCHEM OF NORTH AMERICA INC