Curable fluoroelastomer composition
View Patent ↗Fluoroelastomer compositions comprising fluoroelastomers having copolymerized units of a nitrile-containing cure site monomer are cured with a phthalhydrazide hydrazine or hydroxylamine salt curative.
1. A curable composition comprising:
A) a fluoroelastomer comprising copolymerized units of a nitrile group-containing cure site monomer; and
B) a phthalhydrazide salt of hydrazine or hydroxylamine.
2. A curable composition of claim 1 wherein said phthalhydrazide salt is hydrazine phthalhydrazide.
3. A curable composition of claim 1 wherein said phthalhydrazide salt is hydroxylamine phthalhydrazide.
4. A curable composition of claim 1 further comprising a curative accelerator.
5. A curable composition of claim 1 further comprising a curative in addition to said phthalhydrazide salt.
6. A cured article made from the composition of claim 1 .
7. A cured article of claim 6 having a volume swell, measured according to ASTM D1414, after exposure to 225° C. water for at least 70 hours of less than 5% and a compression set, 300° C., 70 hours, 25% compression, measured according to ASTM D395, of less than 70%.