20-06-2013 дата публикации
Номер: US20130158200A1
Disclosed herein is a curable composition comprising a polyhydroxy curable fluoroelastomer, a polyhydroxy curative, a cure accelerator and an unsaturated metal compound process aid. Such curable compositions have a lower Mooney viscosity than do similar compositions absent the process aid. 1. A curable fluoroelastomer composition comprising:A) a polyhydroxy curable fluoroelastomer;B) a polyhydroxy curative;C) a cure accelerator; and{'sub': (4-n)', 'n, 'sup': 1', '2', '3', '4', '5', '1', '2', '3', '1', '2', '3', '1', '1', '2', '3', '1', '5, 'D) an unsaturated metal compound process aid having the formula YMXwherein Y is selected from alkyl, aryl, carboxylic acid, or alkyl ester groups; M is selected from Si, Ge, or Sn; X is an allyl group CRRCR═CRR, vinyl group CR═CRR, allenyl group CR═C═CRR, alkynyl group C≡CR, or propargyl group CRRC≡CR; R-Rare selected independently from the group consisting of H, F, alkyl, aryl, heterocycle, or perfluoroalkyl groups; and n is 1,2, or 3.'}2. The curable composition of wherein said unsaturated metal compound process aid is of the formula YMXwherein M is Sn claim 1 , X is allyl group CRRCR═CRR claim 1 , Y is alkyl or aryl claim 1 , R-Rare H and n is 1 or 2.3. The curable composition of wherein said unsaturated metal compound process aid is allyltrioctylstannane.4. The curable composition of wherein said unsaturated metal compound process aid is allyltriphenylstannane.5. The curable composition of wherein said unsaturated metal compound process aid is diallyldioctylstannane.6. The curable composition of wherein said unsaturated metal compound process aid is of the formula YMXwherein M is Sn claim 1 , X is vinyl group CR═CRR claim 1 , Y is alkyl or aryl claim 1 , R-Rare H and n is 1.7. The curable composition of wherein said unsaturated metal compound process aid is vinyltrioctylstannane.8. The curable composition of wherein said unsaturated metal compound process aid is vinyltriphenylstannane.9. The curable composition of wherein ...
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