Fibre and film of a water-absorbent water-insoluble material having a matrix of a copolymer
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United States of America Patent
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Nov 14, 1995
Grant Date -
N/A
app pub date -
Nov 16, 1994
filing date -
May 22, 1992
priority date (Note) -
Expired
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Abstract
Fiber or film of water-absorbent water-insoluble fibrous material has a matrix of a crosslinked copolymer formed from 50 to 95% by weight of ethylenically unsaturated carboxylic monomer and 5 to 50% by weight of copolymerisable ethylenically unsaturated monomer. The matrix contains regions of a dispersed polymeric material, the matrix copolymer and the dispersed polymeric material being mutually immiscible and chemically substantially nonreactive under ambient conditions. The fiber or film can be produced by extruding a solution or dispersion of the polymeric material in a solution of the matrix copolymer in its non-crosslinked state into a gaseous environment.
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