Patent US2134408A successfully refreshed from Google Patents.
EP0328050A2
Expired / Lapsed
EP
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High strength chitosan fibers and fabrics thereof
Assignee: EIDP Inc
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Filing: 1989-02-08
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Granted: —
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Expires: 2009-02-08
Abstract
Abstract High strength chitosan fibers from chitin and chitosan derivatives and the process for making these fibers are disclosed.
Inventors
- 👤 George Vincent De Lucca
- 👤 Lorenzo Fred Pelosi
- 👤 John Philip O'brien
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 17:57
CPC Classifications
D; D01; D01F; D01F11/00; C; C08; C08B; C08B37/00; C08B37/0006; C08B37/0024; C08B37/0027; C08B37/003; C08L; C08L5/00; C08L5/08; D01F9/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
62 words
A method for preparing high strength chitosan fibers comprising spinning an anisotropic solution of a derivative of chitin or of chitosan through an inert gas and into a coagulating bath, removing as-spun fiber and treating it with alkali to remove acetyl formyl or other pendant groups at the 2, 3 and 6 carbon positions of the glucosamine repeating unit to form chitosan.
Claim 2
Independent Claim
62 words
A method for preparing high strength chitosan fibers comprising spinning an anisotropic solution of a derivative of chitin or of chitosan through an inert gas and into a coagulating bath, removing as-spun fiber and treating it with alkali to remove acetyl formyl or other pendant groups at the 2, 3 and 6 carbon positions of the glucosamine repeating unit to form chitosan.
Claim 3
Dependent Claim
23 words
The process of claim 1 wherein the as-spun fiber is formed into a fabric prior to conversion to chitosan by treatment with alkali.
Claim 4
Dependent Claim
24 words
The process of claim 1 wherein the as-spun fiber is treated by immersion in about a 50 to 70 wt. % solution of NaOH.
Claim 5
Dependent Claim
9 words
Chitosan fiber produced by the process of claim 1.
References Cited (Backward Citations)
No citation records indexed.
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