Polyhydroxy curable fluoroelastomer compositions

摘要

Disclosed herein is a curable composition comprising a polyhydroxy curable fluoroelastomer, a polyhydroxy curative, a cure accelerator and an unsaturated metal compound process aid comprising a siloxane having at least one vinyl or allyl group bonded to a silicon atom. Such curable compositions have a lower Mooney viscosity than do similar compositions absent the process aid.

主权项

1. A curable fluoroelastomer composition comprising:
A) a polyhydroxy curable fluoroelastomer; B) a polyhydroxy curative; C) a cure accelerator; and D) an unsaturated metal compound process aid comprising a siloxane having at least one vinyl or allyl group bonded to a silicon atom, wherein said unsaturated metal compound process aid is:
1,5-divinyl-3,3-diphenyl-1,1,5,5-tetramethyltrisiloxane,1,3-divinyl-1,3-diphenyl-1,3-dimethyldisiloxane,1,5-divinylhexamethyltrisiloxane,1,3-divinyltetraphenyldisiloxane, orvinyl terminated diphenylsiloxane-dimethylsiloxane copolymer.