Superabsorbing fibers and films and process for preparing same
AssigneeSolutia Inc.
InventorsYueting Chou, Timothy Paul Feast, Jingen Zhang
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Abstract
Superabsorbent fiber composition comprising partially hydrolyzed, internally plasticized, crosslinked, superabsorbing fibers derived from polysuccinimide and process for preparing same. Superabsorbent film composition comprising partially hydrolyzed, internally plasticized, crosslinked, superabsorbing film derived from polysuccinimide and process for preparing same.
Claims40
A process for preparing superabsorbing polyamide fibers comprising:
- i) reacting about 1 to about 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 about 60 to 90% of the succinimide groups of the poly(imide-co-amide) intermediate of i);
- iii) admixing crosslinker with the partially hydrolyzed poly(imide-co-amide) of ii) under non-crosslinking conditions to form a crosslinkable, uncrosslinked, partially hydrolyzed, internally plasticized PSI composition;
- iv) drawing fibers from the composition of iv);
- and
- v) subjecting the fibers to crosslinking conditions to crosslink a portion of uncrosslinked succinimide groups and form the superabsorbing polyamide fibers.
A process for preparing a partially hydrolyzed, internally plasticized polysuccinimide (PSI) composition comprising:
- i) reacting about 1 to about 20% of the succinimide groups of a polysuccinimide polymer having a weight average molecular weight of at least about 20,000 Daltons with one or more monoamines to form an internally plasticized poly(imide-co-amide) intermediate;
- and
- ii) hydrolyzing about 60 to about 90% of the succinimide groups of the poly(imide-co-amide) intermediate.
A process for preparing superabsorbing polyamide fibers which comprises:
- i) drawing fibers from an internally plasticized, partially hydrolyzed, crosslinkable, uncrosslinked polysuccinimide (PSI) composition;
- and
- ii) curing the fibers to crosslink succinimide groups of the PSI composition of i) to render the fibers superabsorbent.
An internally plasticized, partially hydrolyzed, uncrosslinked poly(imide-co-imide) composition useful in forming superabsorbing polymeric fibers or films comprising repeating structural units of ##STR17## wherein x, y and w represent the molar fractions of repeating structural units of the moieties in the internally plasticized, partially hydrolyzed, uncrosslinked poly(imide-co-amide), and are respectively about 0.01 to 0.20, about 0.60 to 0.90 and about 0.01 to 0.30 wherein the sum of x, y and w is 1.0;
- wherein M is an alkali metal cation, ammonium or quaternary ammonium;
- wherein R.sub.1 represents a hydrogen atom or a straight chain or branched, unsubstituted or substituted alkyl or alkenyl group of 1 to 55 carbon atoms, and R.sub.2 represents a hydrogen atom, --OH, or a straight chain or branched, unsubstituted or substituted alkyl or alkenyl group of 1 to 55 carbon atoms;
- wherein the alkyl or alkenyl groups of R.sub.1 and R.sub.2 optionally contain one or more hetero atoms selected from O, N and S, and are optionally substituted with common organic functional groups not interfering with the hydrolysis reaction.
Partially hydrolyzed, internally plasticized, crosslinked, superabsorbing fibers derived from polysuccinimide.
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 about 60 to 90% of the succinimide groups of the poly(imide-co-amide) intermediate of i);
- iii) admixing crosslinker with the partially hydrolyzed poly(imide-co-amide) of ii) under non-crosslinking conditions to form a crosslinkable, uncrosslinked, partially hydrolyzed, internally plasticized PSI composition;
- iv) forming film from the composition of iii);
- and
- v) subjecting the film to crosslinking conditions to crosslink a portion of uncrosslinked succinimide groups and form the superabsorbing polyamide film.
A process for preparing a partially hydrolyzed, crosslinkable, internally plasticized polysuccinimide (PSI) film comprising:
- i) reacting about 1 to about 20% of the succinimide groups of a polysuccinimide polymer having a weight average molecular weight of at least about 20,000 Daltons with one or more monoamines to form an internally plasticized poly(imide-co-amide) intermediate;
- and
- ii) hydrolyzing about 60 to 90% of the succinimide groups of the poly(imide-co-amide) intermediate;
- iii) admixing crosslinker with the partially hydrolyzed poly(imide-co-amide) of ii) under non-crosslinking conditions to form a crosslinkable, uncrosslinked, partially hydrolyzed, internally plasticized PSI composition;
- and
- iv) forming film from the composition of iii).
A process for preparing superabsorbing polyamide film which comprises:
- i) forming film from an internally plasticized, partially hydrolyzed, crosslinkable, uncrosslinked polysuccinimide (PSI) composition;
- and
- ii) curing the film to crosslink succinimide groups of the PSI composition of i) to render the film superabsorbent.
Partially hydrolyzed, internally plasticized, crosslinked, superabsorbing film derived from polysuccinimide.
Dependencies are inferred from the claim text.