发明名称 |
COMPOSITION AND METHOD TO HOMOGENEOUSLY MODIFY OR CROSS-LINKCHITOSAN UNDER NEUTRAL CONDITIONS |
摘要 |
In accordance with the present invention there is provided a new composition and method for chemically modifying chitosan, including N-substituting or N- cross-linking, under homogeneous conditions by providing neutral aqueous chitosan solutions with enhanced reactivity. The method comprises the steps of i) preparing a clear aqueous solution of chitosan, said solution comprising 0.1 to 10% by weight of a chitosan, and 0.1 to 20% by weight of at least one buffering agent having a pKa between 6.0 and 7.6, said solution having a pH ranging from 6.8 to 7.2; and ii) dissolving homogeneously at least one reage nt into the solution of step a), said reagent being reactive toward amine group s of chitosan; and said reagent being at a concentration from 0.01 to 10% by weight. The chitosan in the aqueous solution is chemically modified or cross - linked by a selective substitution on the amino group of chitosan
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申请公布号 |
CA2467049(A1) |
申请公布日期 |
2003.05.22 |
申请号 |
CA20022467049 |
申请日期 |
2002.11.15 |
申请人 |
BIOSYNTECH CANADA INC. |
发明人 |
CHAPUT, CYRIL;SELMANI, AMINE;DABBARH, FOUAD;BERRADA, MOHAMMED;CHENITE, ABDELLATIF |
分类号 |
A61L27/46;A61L27/52;C08B37/08;C08L5/08;(IPC1-7):C08B37/08 |
主分类号 |
A61L27/46 |
代理机构 |
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主权项 |
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地址 |
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