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US 6,294,588 B1Granted
Superabsorbing fibers and films and processes for preparing same
AssigneeSolutia Inc.
InventorsYueting Chou, Timothy Paul Feast, Jingen Zhang, David Sikora
Life of this patent
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Abstract
Superabsorbent fiber and film compositions comprising partially acidified, hydrolyzed, internally plasticized, crosslinked, superabsorbing fibers or film derived from polysuccinimide and processes for preparing same.
Claims14
A process for preparing superabsorbing polyamide film comprising:
- i) reacting about 1 to 20% of the succinimide groups of a polysuccinimide (PSI) with one or more monoamines to form an internally plasticized poly(imide-co-amide) intermediate;
- ii) hydrolyzing essentially all of the succinimide groups of the poly(imide-co-amide) intermediate of i) to form an internally plasticized polyamide;
- iii) acidifying about 1 to 50% of the hydrolyzed succinimide groups of the polyamide of ii);
- iv) admixing crosslinker with the partially acidified polyamide of iii) under non-crosslinking conditions to form a crosslinkable, uncrosslinked, partially acidified, hydrolyzed, internally plasticized PSI composition;
- v) forming film from the composition of iv);
- and
- vi) subjecting the film to crosslinking conditions to crosslink a portion of uncrosslinked groups and form the superabsorbing polyamide film.
4 more elements
A process for preparing superabsorbing polyamide film which comprises:
- i) forming film from an internally plasticized, partially acidified, hydrolyzed, crosslinkable, uncrosslinked polysuccinimide (PSI) composition;
- and
- ii) curing the film to crosslink the uncrosslinked groups of the PSI composition of i) to render the film superabsorbent.
Partially acidified, hydrolyzed, internally plasticized, crosslinked, superabsorbing film derived from polysuccinimide.
Dependencies are inferred from the claim text.