초록 ▼

Crosslinked poly(amino acids) useful as superabsorbent polymers and an improved process for preparing the crosslinked poly(amino acids) is disclosed. Use of polyaziridine and polyepoxide crosslinkers allows the production of superabsorbent polymers that is free of special handling steps required to

Crosslinked poly(amino acids) useful as superabsorbent polymers and an improved process for preparing the crosslinked poly(amino acids) is disclosed. Use of polyaziridine and polyepoxide crosslinkers allows the production of superabsorbent polymers that is free of special handling steps required to process hydrogel materials using conventional preparation methods.

대표청구항 ▼

[ We claim:] [1.] A crosslinked poly(amino acid) having the stoichiometric formula: EQU [A].sub.x [B].sub.y, rein A represents repeat units of backbone polymer structure [1] and B represents crosslinking units of structures [2] or [3] randomly distributed among the units of polymer structure [1] thr

[ We claim:] [1.] A crosslinked poly(amino acid) having the stoichiometric formula: EQU [A].sub.x [B].sub.y, rein A represents repeat units of backbone polymer structure [1] and B represents crosslinking units of structures [2] or [3] randomly distributed among the units of polymer structure [1] through ester linkage formation with a carboxylate group of radical R, [ STR 6 ] wherein x represents weight percent of A units and y represents weight percent of B units, based on weight of combined A and B units; wherein x is from 80 to 99.9 weight percent and y is from 0.1 to 20 weight percent; m is 0, 1 or 2; n is from 20 to 20,000; R is a radical selected from the group consisting of one or more of --C(.dbd.O)OM, --CH.sub.2 C(.dbd.O)OM and --CH.sub.2 CH.sub.2 C(.dbd.O)OM, and M is selected from the group consisting of one or more of H, alkali metal ion and alkaline earth metal ion; X is O, S or N; R.sup.1 is a residue of a di-, tri- or tetrafunctional group selected from (C.sub.1-C.sub.4)alkylene, aryl, arylalkyl and methylene ether of a (C.sub.6 -C.sub.5)polyphenol, (C.sub.2 -C.sub.6)alkanepolyol or poly(alkylene glycol); each R.sup.2 is H when X is O or S and each R.sup.2 is independently H or (C.sub.1 -C.sub.3)alkyl when X is N; R.sup.3 is a residue of a di-, tri- or tetrapropionate ester of a (C.sub.2 -C.sub.6)alkanepolyol; a is 0 or 1; and b is 1, 2 or 3.