Composition of matter comprising an intractable ionic...

Details Composition of matter comprising an intractable ionic... Composition of matter comprising an intractable ionic...

C - Chemistry, Metallurgy

08

L

400/6105, 400/64

C08L 23/32 (2006.01)

Patent

CA 1056544

ABSTRACT OF THE DISCLOSURE This invention relates to a processable ionic elastomer compositions having improved compression set properties, especially at elevated temperatures. In this invention an intractable ionic elastomer, for example, a sulfonated elastomer is blended with from 10 to 70 parts per hundred of a crystalline polyolefin to yield novel compositions having the above properties. Preferably the ionic elastomer is a sulfonated ethylene propylene terpolymer having from about .2 to 20 mole percent sulfonate groups, at least 95% of which are combined with counterions selected from the group consisting of Groups IA, IIA, IB and IIB of the Periodic Table of the Elements, aluminum, antimony, lead, and mixtures thereof. The sulfonated polymer is combined with said counterions by neutrali- zation of a polysulfonic acid precurser with a basic material in which the desired counterion is present as the cation thereof. The anion of said basic material is preferably selected from the group consisting of oxide, hydroxide, and lower alkanoates, for example, acetate, formate, and propionate.

239765

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