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Fluorinated Block Copolymers

A technology of block copolymer and fluorination, which is applied in the field of fluorinated block copolymers, can solve the problems of not being interested in it, and the cost of perfluoroelastomers is not desirable.

Active Publication Date: 2020-07-28
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for certain applications and markets, the cost of perfluoroelastomers may make them undesirable or prohibitive

Method used

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  • Fluorinated Block Copolymers
  • Fluorinated Block Copolymers
  • Fluorinated Block Copolymers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-5

[0133] Embodiment 1-5 (EX 1-EX 5) and comparative example A-D (CE A-CE D)

[0134] With the exception of Polymer 8, which had a modulus too high to be processed otherwise, each of the above polymers was individually compounded on a two-roll mill as follows: 100 parts of polymer, 30 phr of carbon black, 3 phr of active Auxiliary and 2phr of peroxide. As mentioned above, follow the "Transition T α and T β ", "Cure Rheology" and "Physical Properties" tested the compounded polymers and the results are reported in Table 2. The physical properties of CE C were not tested as it did not exhibit sufficient curing properties.

[0135] The physical properties of Ex 1-5 and CE A, CE B and CE D were also tested at 150°C and the results are also shown in Table 2.

[0136] Table 2

[0137]

[0138]

[0139] In Table 2, NA means not applicable. For example, in CE A, the O-rings were not manufactured because they were difficult to machine, so the compression set was not tested. ...

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Abstract

Described herein are millable fluorinated block copolymers having at least one A block and at least one B block, wherein the A block is a semi-crystalline segment, and the semi-crystalline The crystalline segment comprises repeated divalent monomer units derived from TFE, HFP, and VDF; and the B block is a segment comprising repeated divalent monomer units derived from HFP and VDF; and wherein the The modulus at 100° C. of the millable fluorinated block copolymer is 0.1 MPa to 2.5 MPa.

Description

technical field [0001] The present invention describes fluorinated block copolymers that can be processed as elastomers. Background technique [0002] There is an increasing demand for higher temperature elastomers that are adequately competent at temperatures such as 200°C to 330°C. Due to the higher bond energy of the C-F bond, perfluoroelastomers (fully fluorinated molecules) have traditionally been used at these extreme temperature conditions. For certain applications and markets, however, the cost of perfluoroelastomers may make them undesirable or prohibitive. [0003] Partially fluorinated elastomers are generally less expensive than perfluorinated elastomers, and because they contain some fluorine, they perform adequately in some of the same extremes as perfluorinated elastomers (such as chemical resistance, etc.). However, partially fluorinated elastomers do not perform as well as their perfluorinated counterparts in high temperature sealing applications requiring...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F293/00
CPCC08F293/005C08F2438/01C08F16/24C08F214/222C08F214/262C08F214/282C08F299/022C08K5/14
Inventor 迈克尔·H·米切尔丹尼斯·杜谢恩福士达夫沃纳·M·A·格鲁泰尔特拉里·A·拉斯特彼得·J·斯科特卡尔·D·韦兰德特
Owner 3M INNOVATIVE PROPERTIES CO