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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AI-Extracted Technical Summary

Problems solved by technology

In addition to incompatibility, TAIC also tends to undergo undesired homopolymeriz...

Method used

[0029] Other materials may be incorporated into the composition to further enhance the physical properties of the composition. For example, acid acceptors may be employed to facilitate curing and thermal stability of the compound. Suitable acid acceptors may include, for example, magnesium oxide, lead oxide, calcium oxide, calcium hydroxide, lead dibasic phosphate, zinc oxide, bar...

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.

Technology Topic

SilanesElastomer +5

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Examples

Experimental program(2)
Effect test(1)

Example Embodiment

[0041] Instance

[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

[0047] Examples 1-11 and Comparative Examples 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.

PUM

Description & Claims & Application Information

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