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Fluoropolymer curing co-agent compositions

A technology for curing reactive, fluorocarbon polymers, applied in the field of fluoropolymer curing coagent compositions, capable of solving problems such as incompatibility and processing difficulties

Inactive Publication Date: 2008-12-24
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition to incompatibility, TAIC also tends to undergo undesired homopolymerization, which can lead to processing difficulties when making fluorinated elastomers

Method used

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  • Fluoropolymer curing co-agent compositions
  • Fluoropolymer curing co-agent compositions

Examples

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example

[0042] Unless otherwise specified, all parts, percentages, ratios, etc. in the examples and other parts of the specification are by weight, and all reagents used in the examples are or can be obtained from general chemical suppliers, such as Sigma-Aldrich Company , Saint Louis, Missouri, or can be synthesized by conventional methods.

[0043] These abbreviations are used in the following examples: wt = weight, min = minutes, mol = moles; phr = parts per hundred parts of rubber, hr = hours, °C = degrees Celsius, psi = pounds per square inch, MPa = million pascals , And Nm = Newton-meter.

[0044] The following abbreviations and abbreviated names are used:

[0045] Abbreviation

[0046] Abbreviation

example 1-11 and comparative example 1-7

[0048] The selected fluoropolymer was mixed with the additives indicated in Table 1 on a two-roll mill. The mixed mixture was pressure-cured under various temperature and time conditions as indicated in Table 3. The molded test sheets and O-rings were then post-cured in air under various temperature and time conditions as indicated in Table 3.

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Abstract

Provided is a composition comprising a fluorocarbon polymer, a radical initiator, and a first curing co-agent. The first curing co-agent comprises at least one silicon-containing group selected from a hydrocarbyl silane and a hydrocarbyl silazane. Furthermore, the first curing co-agent is substantially free of siloxane groups and comprises at least one polymerizable ethylenically unsaturated group. Also provided are the reaction product of these compositions and a method of making an elastomer comprising curing these compositions.

Description

Technical field [0001] This specification relates to fluoropolymer curing coagent compositions, cured products, and methods for curing. Background technique [0002] Fluorinated (especially perfluorinated) elastomers have unique heat and chemical resistance properties. However, it can be difficult to prepare these elastomers from fluoropolymer precursors (sometimes referred to as "green gums"). Fluoropolymer precursors and compositions containing these fluoropolymer precursors may be incompatible with processing additives such as triallyl isocyanurate (TAIC) and curing additives. In addition to incompatibility, TAIC also tends to undergo undesirable homopolymerization, which can cause processing difficulties when preparing fluorinated elastomers. Summary of the invention [0003] In one aspect, this specification relates to a composition comprising a fluorocarbon polymer, a free radical initiator, and a first curing co-agent. The first curing coagent is selected from hydrocarbyl...

Claims

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Application Information

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IPC IPC(8): C08L27/12C08L101/00
CPCC08F14/18C08K5/0025C08K5/54C08K5/5403C08F2/00C08L27/12C08L101/00
Inventor 艾里克·W·阿代尔彼得·比辛格尔史蒂文·G·科威林罗伯特·E·埃格斯凯·H·洛哈斯沃尔那·M·A·格鲁塔特
Owner 3M INNOVATIVE PROPERTIES CO
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