Solvay Specialty Polymers Italy S.p.a.

Terry Michael Kitchens

Marco Avataneo

Marco Dossi

Bryan Benson

Philip Schild

Sean O'KEEFFE

The invention pertains to a fluoroelastomer composition comprising: (a) a vinylidene fluoride-based fluoroelastomer [fluoroelastomer (A)] comprising recurring units derived from vinylidene fluoride (VDF) and recurring units derived from at least one additional (per)fluorinated monomer; said fluoroelastomer (A): &#x2014;possessing a polydispersity index (IMWD) of between 1.5 and 3.5, &#x2014;comprising an amount of polar end groups of formula &#x2014;CFCHOH of at least 3 mmol/kg and at most 6 mmol/kg, and &#x2014;further comprising end of chain groups of formula &#x2014;CFH, &#x2014;CFCH, and, optionally, &#x2014;OC(o)&#x2014;R(with Rbeing a C-Calkyl group) in an amount such to satisfy the following inequality: [&#x2014;CFCHOH]+[&#x2014;CFH]+[&#x2014;CFCHH&#x2014;OC(o)R]&#x2264;30+(2&#xd7;10)/M, (b) at least one polyhydroxylated curing agent; (c) at least one accelerant; (d) at least one metal oxide selected from the group consisting of divalent metal oxides; and (e) optionally, at least one metal hydroxide, wherein the amount of said metal hydroxide, if present, is below 3 phr, based on 100 weight parts of fluoroelastomer (A).

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Cleveland, GA, United States of America

Terry Michael Kitchens