Aldehyde-functionalized polysaccharides
First Claim
1. A composition comprising at least one aldehyde-functionalized polysaccharide containing pendant aldehyde groups, said aldehyde-functionalized polysaccharide having a weight-average molecular weight of about 3,000 to about 250,000 Daltons and a degree of aldehyde substitution of greater than 40% to about 200%;
- wherein;
(i) said pendant aldehyde groups are attached to the polysaccharide through linking groups which do not contain a nitrogen atom;
(ii) said linking groups are attached to the polysaccharide by ether linkages; and
(iii) said linking groups contain an alkoxy group alpha to the pendant aldehyde group.
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Abstract
Novel aldehyde-functionalized polysaccharide compositions are described that are more stable in aqueous solution than oxidized polysaccharides or other types of polysaccharides containing pendant aldehyde groups. 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.
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Citations
8 Claims
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1. A composition comprising at least one aldehyde-functionalized polysaccharide containing pendant aldehyde groups, said aldehyde-functionalized polysaccharide having a weight-average molecular weight of about 3,000 to about 250,000 Daltons and a degree of aldehyde substitution of greater than 40% to about 200%;
- wherein;
(i) said pendant aldehyde groups are attached to the polysaccharide through linking groups which do not contain a nitrogen atom; (ii) said linking groups are attached to the polysaccharide by ether linkages; and (iii) said linking groups contain an alkoxy group alpha to the pendant aldehyde group. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- wherein;
Specification