Keratin-based powders and hydrogel for pharmaceutical applications
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United States of America Patent
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N/A
Issued Date -
N/A
app pub date -
Apr 8, 2003
filing date -
Sep 13, 1999
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A hydratable, highly absorbent keratin solid fiber or powder capable of absorbing a large weight excess of water may be produced by partially oxidizing hair keratin disulfide bonds to sulfonic acid residues and reacting the sulfonic acid residues with a cation. The neutralized suspension can be filtered, washed, and dried, leaving keratin solid which can be shredded into fibers and further ground into powder. Addition of water to the solid produces a hydrogel. The powder or hydrogel may be useful as an absorbent material, as a therapeutic for skin, or as an excipient. The keratin materials can be incorporated into nonwoven films. The hydrogel can be used as a biocompatible viscoelastic filler for implant applications. Another use for the absorbent keratin and keratin hydrogel is as an excipient in pharmaceutical and cosmetic applications.
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Cited Art Landscape
Patent Citation Ranking
- 11 Citation Count
- A61K Class
- 61.71 % this patent is cited more than
- 21 Age