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US 8,618,222 B2Granted
Curable fluoroelastomer composition
AssigneeE. I. Du Pont de Nemours and Company
InventorsChristopher J Bish, Peter A Morken
Life of this patent
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Abstract
Fluoroelastomer compositions comprising fluoroelastomers having copolymerized units of a nitrile group-containing cure site monomer are cured with certain hydroxylamine derivatives. The hydroxylamine derivative is of formula R1(C(O))nNHOR2 wherein n is 0 or 1; R1 is H, C(O)R3, C(O)R4, C(O)OR3, or C(O)SR3; R2 is H, C(O)R3, or C(O)OR3; R3 is C1-C20 alkyl group, aryl, heterocycle, benzyl, 9-fluorenylmethyl, or CH2R4; and R4 is a fluoroalkyl group, with the proviso that R1 and R2 cannot simultaneously be H.
Claims10
A curable composition comprising:
- A. a fluoroelastomer comprising copolymerized units of a nitrile group-containing cure site monomer;
- and
- B. an hydroxylamine derivative of formula R1(C(O))nNHOR2 wherein n is 0 or 1;
- R1 is H, C(O)R3, C(O)R4, C(O)OR3, or C(O)SR3;
- R2 is H, C(O)R3, or C(O)OR3;
- R3 is C1-C20 alkyl group, aryl, heterocycle, benzyl, 9-fluorenylmethyl, or CH2R4;
- and R4 is a fluoroalkyl group, with the proviso that R1 and R2 cannot simultaneously be H.
4 more elements
Dependencies are inferred from the claim text.