Chemistry: natural resins or derivatives; peptides or proteins; – Proteins – i.e. – more than 100 amino acid residues
Patent
1992-04-17
1994-02-08
Russel, Jeffrey E.
Chemistry: natural resins or derivatives; peptides or proteins;
Proteins, i.e., more than 100 amino acid residues
502402, 502403, 525 541, 525432, 528310, 528321, 528328, 530300, 530352, 604365, 604372, A61F 1315, B01J 2026, C07K 1500, C08L 7704
Patent
active
052849368
ABSTRACT:
Substantially water-insoluble, crosslinked polypeptides containing 15 to 85 mole % of amino acid residues such as glutamic acid, aspartic acid, phosphoserine, phosphohomoserine, phosphotyrosine, phosphothreonine, phosphoasparagine, or phosphoglutamine, and 15 to 85 mole % of amino acid residues such as lysine, arginine, asparagine, glutamine, serine or tyrosine, in which the degree of crosslinking is sufficient to result in a substantially water-insoluble polypeptide with the ability to absorb a 1 wt. % aqueous NaCl solution in an amount of at least 20 times the weight of the polypeptide, are useful as superabsorbents in devices such as diapers, etc. Mild alkaline hydrolysis of the crosslinked polypeptides increases their superabsorbency by two to three fold.
REFERENCES:
patent: Re32649 (1988-04-01), Brandt et al.
patent: 3474083 (1969-10-01), Shiga et al.
patent: 3948863 (1976-04-01), Akamatsu et al.
patent: 4534881 (1985-08-01), Sikes et al.
patent: 4585560 (1986-04-01), Sikes et al.
patent: 4587021 (1986-05-01), Wheeler et al.
patent: 4590260 (1986-05-01), Harada et al.
patent: 4654039 (1987-03-01), Brandt et al.
patent: 4703067 (1987-10-01), Mikita et al.
patent: 4771089 (1988-09-01), Ofstead
patent: 4777231 (1988-10-01), Bailey et al.
patent: 4833222 (1989-05-01), Siddal et al.
patent: 4866161 (1989-09-01), Sikes et al.
patent: 4868287 (1989-09-01), Sikes et al.
patent: 4892733 (1990-01-01), Bichon et al.
patent: 4996292 (1991-02-01), Fox et al.
patent: 5051401 (1991-09-01), Sikes
patent: 5204099 (1993-04-01), Barbier et al.
Overell et al., "Polymers of Some Basic and Acidic .alpha.-Amino Acids", J. Chem. Soc., 1955, pp. 232-236.
Fox et al., J. Am. Chem. Soc., vol. 82, pp. 3745-3751 (1959).
Fox et al., Science, vol. 128, p. 1214 (1958).
Donachy Julie
Sikes C. Steven
Russel Jeffrey E.
University of South Alabama
LandOfFree
Polyamino acid superabsorbents does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Polyamino acid superabsorbents, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polyamino acid superabsorbents will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-698720