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US 2013/0158154 A1Published application
Coagent for free radical curing fluoroelastomers
AssigneeE.I.Du Pont De Nemours and Company
InventorsDonald F. Lyons, Peter A. Morken, Walter W. Schmiegel
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Abstract
Disclosed herein are curable compositions comprising a free radical curable fluoroelastomer, a free radical generating compound and an unsaturated metal compound coagent. Such compositions cure well, exhibit good (i.e. low) compression set resistance and process well (i.e. have reduced polymer viscosity compared to similar compositions not containing the unsaturated metal compound coagent).
Claims16
A curable fluoroelastomer composition comprising:
- A) a fluoroelastomer having chloro, bromo or iodo cure sites;
- B) a free radical generating compound;
- and
- C) an unsaturated metal compound coagent having the formula Y(4-n)MXn wherein Y is selected from alkyl, aryl, carboxylic acid, or alkyl ester groups;
- M is selected from Si, Ge, Sn, or Pb;
- X is an allyl group CR1R2CR3═CR4R5, vinyl group CR1═CR2R3, allenyl group CR1═C═CR2R3, alkynyl group C≡CR1, or propargyl group CR1R2C≡CR3;
- R1—R5 are selected independently from the group consisting of H, F, alkyl, aryl, heterocycle, or perfluoroalkyl groups;
- and n is 1, 2, or 3.
5 more elements
Dependencies are inferred from the claim text.