Biodegradable, water-resistant polymer material
First Claim
1. Biodegradable, water resistant polymer material formed in a layer or film of predetermined thickness and produced by a process comprising the steps ofa. at least partially derivatizing polysaccharides and/or polypeptides at their hydroxyl, amino, imino, thiol and/or carboxyl groups in a non-radical reaction with an agent including cross-linkable groups to form an uncross-linked reaction product andb. converting the uncross-linked reaction product to form a product of cross-linking reaction by cross-linking the cross-linkable groups, whereinc. said material biodegrades within a reasonable length of time.
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Abstract
A novel biodegradable, water-resistant polymer material which can be produced with defined material properties is suggested, in particular in the form of foils, films, strips, masses, molded articles or the like, this material consisting essentially of a product of the cross-linking reaction of polysaccharides and/or polypeptides, the hydroxyl, amino, imino, thiol and/or carboxyl groups of which are derivatized at least partially in a non-radical reaction with agents which include groups cross-linkable in a process step following the derivatization and separate therefrom.
38 Citations
25 Claims
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1. Biodegradable, water resistant polymer material formed in a layer or film of predetermined thickness and produced by a process comprising the steps of
a. at least partially derivatizing polysaccharides and/or polypeptides at their hydroxyl, amino, imino, thiol and/or carboxyl groups in a non-radical reaction with an agent including cross-linkable groups to form an uncross-linked reaction product and b. converting the uncross-linked reaction product to form a product of cross-linking reaction by cross-linking the cross-linkable groups, wherein c. said material biodegrades within a reasonable length of time.
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21. A biodegradable polymer produced by a process comprising the steps of:
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(a) providing a starting material, said starting material comprising a polypeptide; (b) at least partially derivatizing said starting material at a reactive group selected from among hydroxyl, amino, imino, thiol, and carboxyl in a non-radical reaction with an agent including cross-linkable groups to form an uncrosslinked reaction product; and (c) converting said uncrosslinked reaction product to a biodegradable polymeric reaction product by cross-linking the cross-linkable groups. - View Dependent Claims (24, 25)
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22. A biodegradable polymer produced by a process comprising the steps of:
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a. providing a starting material, said starting material comprising at least one polypeptide portion and at least one polysaccharide portion; b. at least partially derivatizing said starting material at a reactive group selected from among hydroxyl, amino, imino, thiol, and carboxyl in a non-radical reaction with an agent including cross-linkable groups to form an uncrosslinked reaction product; and c. converting said uncrosslinked reaction product to a biodegradable polymeric reaction product by cross-linking the cross-linkable groups. - View Dependent Claims (23)
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Specification