The Standard Oil Company

Gary W Dirks

George S Li

John F Jones

Irving Rosen

Polymeric compositions having high heat-distortion temperatures which function as gas and vapor barrier materials which are composed of an olefinically unsaturated nitrile, such as acrylonitrile, and indene are produced by the copolymerization of said olefinically unsaturated nitrile and crude indene which can be derived from various sources.

Process for preparing low-cost copolymers from acrylonitrile and crude

Polymer resins which are relatively high softening and function as gas and vapor barrier materials are composed of an olefinically unsaturated nitrile, such as acrylonitrile, a vinyl ether, such as butyl vinyl ether, and indene or coumarone.

Acrylonitrile-vinyl ether-indene or coumarone polymers

Polymers which are water swellable in the form of their salts are prepared by polymerization of a monomeric mixture of maleic anhydride, indene and a cross-linking monomer containing a plurality of CH.sub.2 .dbd.C&lt; groupings.

Cross-linked water-swellable indene-maleic anhydride interpolymers

Polymer resins which are impact resistant, have high flexural strengths, are relatively high softening and function as gas and vapor barrier materials are composed of an olefinically unsaturated nitrile, such as acrylonitrile, a vinyl ether, such as butyl vinyl ether, indene and a conjugated diene rubber, such as an acrylonitrile-butadiene copolymer.

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Scottsdale, AZ, United States of America

Gary W Dirks