Water swellable compositions
AssigneeGAF Corporation
InventorsEarl P. Williams, Donald H. Lorenz
Life of this patent
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Abstract
Water swellable reaction product of monobasic amine and crosslinked interpolymer of maleic anhydride, monovinyl alkyl ether and 1-5 mole percent crosslinking agent comprising divinyl ether of aliphatic diol.
Claims11
A water swellable composition consisting essentially of reaction product of monobasic amine and crosslinked interpolymer consisting essentially of substantially equimolar quantities of maleic anhydride and a monovinyl alkyl ether wherein the alkyl group contains from 1 to 4 carbon atoms and from about 1 to about 5 mole percent, based on the monovinyl alkyl ether, of a crosslinking agent having a formula selected from the class consisting of:
- H.sub.2 C.dbd.CH--O--X.sub.1 --OCH.dbd.CH.sub.2
- and
- H.sub.2 C.dbd.CH.sub.2 --(OX.sub.2).sub.n --OCH.dbd.CH.sub.2
- where X.sub.1 represents an alkylene group of two to twelve carbon atoms and X.sub.2 represents an alkylene group of two to four carbon atoms and n represents an integer of 2 to 100.
Dependencies are inferred from the claim text.