Patent ID: 6191216
Filing Date: 2001-02-20
Classification: C08G,C09J

Abstract:
Hydrophilic, self-adhesive polyurethane gel compositions prepared froma) polyether polyols with 2 to 6 hydroxyl groups and having OH values of 20 to 112 and an ethylene oxide (EO) content of .gtoreq.10 wt. %,b) anti-oxidants,c) bismuth(III) carboxylates soluble in the polyether polyols a) and based on carboxylic acids having 2 to 18 C atoms as catalysts together withd) hexamethylene diisocyanate or a modified hexamethylene diisocyanate,wherein the product of the functionalities of the polyurethane-forming components a) and d) is at least 5.2, the quantity of catalyst c) amounts to 0.005 to 0.25 wt. %, relative to the polyols a), the quantity of anti-oxidants b) is in the range of .gtoreq.0.1 wt. %, relative to the polyols a) and a ratio of free NCO groups in component d) to the free OH groups in component a) in the range from 0.30 to 0.70 is selected.