Cross-linked water-swellable indene-maleic anhydride interpolymers
AssigneeThe Standard Oil Company
InventorsGary W. Dirks, George S. Li, John F. Jones
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Abstract
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< groupings.
Claims5
The cross-linked, water-swellable solid polymer composition which results from the polymerization in an inert organic diluent in the presence of a free-radical initiator at a temperature in the range of 0.degree. to 100.degree. C of a mixture of substantially equimolar amounts of maleic anhydride and indene and from 0.01 to 10% by weight based on the combined weight of maleic anhydride and indene of a cross-linking monomer having a plurality of polymerizable CH.sub.2 .dbd.C<
- groupings.
Dependencies are inferred from the claim text.