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US 5,397,837 AGranted
Compatibilized blends containing halogenated copolymers of isobutylene and para-methyl styrene and carboxy modified elastomers
AssigneeExxon Chemical Patents Inc.
InventorPalanisamy Arjunan
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Abstract
A compatibilized polymer blend composition is provided which comprises a uniform admixture of a halogenated copolymer of an isomonoolefin, such as polyisobutylene, and a para-alkylstyrene, such as para-methylstyrene blended with a carboxy-modified elastomer. Blends also containing an unmodified elastomer are provided wherein the carboxy-modified elastomer serves to compatibilize the unmodified elastomer and the halogenated copolymer.
Claims12
A compatibilized elastomer blend composition comprising a uniform admixture of:
- (i) a halogenated interpolymer of a C.sub.4 to C.sub.7 isomonoolefin copolymerized with a para-alkylstyrene, said copolymer containing from about 0.5 to about 20 mole % of monomer units of the following structure randomly distributed therein:
- ##STR3## wherein R and R' are independently selected from the group consisting of hydrogen and lower alkyl, R" is independently selected from the group consisting of hydrogen, lower alkyl and halogen, and X is bromine or chlorine;
- and
- (ii) a carboxy-modified elastomer.
1 more element
Dependencies are inferred from the claim text.