Aldehyde-functionalized polysaccharides
First Claim
1. A composition comprising at least one aldehyde-functionalized polysaccharide containing pendant dialdehyde groups, said aldehyde-functionalized polysaccharide having a weight-average molecular weight of about 1,000 to about 1,000,000 Daltons and a degree of aldehyde substitution of about 5% to about 100%, wherein:
- (i) each pendant dialdehyde group is attached to the polysaccharide through a linking group comprising carbon, hydrogen, and oxygen atoms,(ii) said linking group is attached to the polysaccharide by an ether or an ester linkage,(iii) said linking group does not contain an aromatic ring,(iv) said pendant dialdehyde groups comprise two aldehyde functionalities separated by 2 to 4 atoms, and(v) said two aldehyde functionalities are not bound to two adjacent carbon atoms that are bound together by a carbon-carbon double bond.
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Accused Products
Abstract
Novel aldehyde-functionalized polysaccharide compositions containing pendant dialdehyde groups are described that are more stable in aqueous solution than oxidized polysaccharides. The aldehyde-functionalized polysaccharides may be reacted with various amine-containing polymers to form hydrogel tissue adhesives and sealants that may be useful for medical applications such as wound closure, supplementing or replacing sutures or staples in internal surgical procedures such as intestinal anastomosis and vascular anastomosis, tissue repair, preventing leakage of fluids such as blood, bile, gastrointestinal fluid and cerebrospinal fluid, ophthalmic procedures, drug delivery, and preventing post-surgical adhesions.
88 Citations
12 Claims
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1. A composition comprising at least one aldehyde-functionalized polysaccharide containing pendant dialdehyde groups, said aldehyde-functionalized polysaccharide having a weight-average molecular weight of about 1,000 to about 1,000,000 Daltons and a degree of aldehyde substitution of about 5% to about 100%, wherein:
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(i) each pendant dialdehyde group is attached to the polysaccharide through a linking group comprising carbon, hydrogen, and oxygen atoms, (ii) said linking group is attached to the polysaccharide by an ether or an ester linkage, (iii) said linking group does not contain an aromatic ring, (iv) said pendant dialdehyde groups comprise two aldehyde functionalities separated by 2 to 4 atoms, and (v) said two aldehyde functionalities are not bound to two adjacent carbon atoms that are bound together by a carbon-carbon double bond. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification