EP 0401210 A4 19901227 - THERMALLY REVERSIBLE POLYURETHANE HYDROGELS AND COSMETIC, BIOLOGICAL AND MEDICAL USES
Title (en)
THERMALLY REVERSIBLE POLYURETHANE HYDROGELS AND COSMETIC, BIOLOGICAL AND MEDICAL USES
Publication
Application
Priority
US 8800280 W 19880201
Abstract (en)
[origin: WO8907117A1] Thermally reversible polyurethane hydrogels are formed by adding water to a gel forming hydrophilic polyurethane polymer produced by reacting under anhydrous conditions an organic diisocyanate with a glycol component in an NCO/OH mole ratio of from about 0.5/1 to about 1/1 wherein the percentage by weight of the diisocyanate in the reaction mixture is from about 2 % to about 25 %. The hydrogels are solids at room temperature but liquify at higher temperatures such as body temperature and therefore are useful as carriers for the protection, delivery and sustained release of a variety of active agents including pharmaceuticals, cosmetics, living cells and organisms.
IPC 1-7
IPC 8 full level
A61K 8/04 (2006.01); A61K 8/87 (2006.01); A61K 9/20 (2006.01); A61L 26/00 (2006.01); A61Q 17/00 (2006.01); A61Q 19/00 (2006.01); C08G 18/48 (2006.01); C08G 18/66 (2006.01); C08G 18/75 (2006.01)
CPC (source: EP)
A61K 8/042 (2013.01); A61K 8/87 (2013.01); A61K 9/2031 (2013.01); A61L 26/0019 (2013.01); A61L 26/008 (2013.01); A61Q 13/00 (2013.01); A61Q 15/00 (2013.01); A61Q 17/00 (2013.01); A61Q 19/00 (2013.01); C08G 18/4833 (2013.01); C08G 18/6674 (2013.01); C08G 18/758 (2013.01); C08G 2210/00 (2013.01)
C-Set (source: EP)
Citation (search report)
- [X] EP 0043974 B1 19840620
- [E] GB 2203158 A 19881012 - TYNDALE PLAINS HUNTER LTD
- [A] EP 0117768 A1 19840905 - ESSILOR INT [FR]
- See references of WO 8907117A1
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
WO 8907117 A1 19890810; EP 0401210 A1 19901212; EP 0401210 A4 19901227
DOCDB simple family (application)
US 8800280 W 19880201; EP 88902003 A 19880201