BIOABSORBABLE POLYMERS FROM BIOABSORBABLE POLYISOCYANATES AND USES THEREOF
申请人:Bezwada Rao S.
公开号:US20090292029A1
公开(公告)日:2009-11-26
Novel bioabsorbable and/or biocompatible polyurethanes, polyureas, polyamideurethanes and polyureaurethanes with tunable physical, mechanical properties and hydrolytic degradation profiles are provided for use in biomedical applications such as stents, stent coatings, scaffolds, foams, and films. The disclosed polymers may be derived from biocompatible and/or bioabsorbable polyisocyanates. The present invention also relates to new and improved methods for the preparation of the biocompatible and/or bioabsorbable polyisocyanates.
CONTROL RELEASE OF BIOLOGICALLY ACTIVE COMPOUNDS FROM MULTI-ARMED OLIGOMERS
申请人:Bezwada Rao S.
公开号:US20090076174A1
公开(公告)日:2009-03-19
The present invention relates to the discovery of biodegradable multi-armed oligomers wherein the end groups of these oligomers have been functionalized with biologically active molecules. The resultant multi-armed oligomers end-functionalized with biologically active molecules have a controllable degradation profile. The hydrolytic degradation of oligomers of the present invention releases the biologically active compound as such with no change in native chemical structure.
PROCESS FOR THE PREPARATION OF CROSSLINKED NITROXIDE POLYMERS
申请人:Nesvadba Peter
公开号:US20100240858A1
公开(公告)日:2010-09-23
The invention relates to a process for the preparation of crosslinked polymers bearing nitroxide groups, which are prepared by a method frequently called atom transfer radical addition polymerization (ATRA). A further aspect of the invention is the use of such polymeric crosslinked nitroxides as stabilizers for polymers against the detrimental influences of heat and UV light, as stabilizers against premature polymerization of vinyl aromatic monomers and as active electrode materials in secondary batteries.