Absorbent gelling materials of crosslinked polyaspartate
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United States of America Patent
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Jun 30, 1998
Grant Date -
N/A
app pub date -
Feb 2, 1996
filing date -
Feb 2, 1996
priority date (Note) -
Expired
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Abstract
Absorbent gelling materials are prepared by crosslinking polyaspartate units. The crosslinked homopolymers exhibit improved gel volumes, gel strengths and extractable material characteristics. Using diamine crosslinkers in an amount of 2.5-30 percent by weight, the blue-dextran saline gel volumes of at least 15 can be obtained. Similarly, gel strengths of 300 N/m.sup.2 or better, including gel strengths above 3000 N/m.sup.2, can be obtained. The resulting product is susceptible of a variety of uses, is biodegradable, and can be prepared in a particle size suitable for use in a diaper.
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