Patent ID: 6169157
Filing Date: 2001-01-02
Classification: A43B,C08G,C08K

Abstract:
A process for the production of semi-rigid, solid or cellular polyurethane-based mouldings comprising the reaction of a) organic and/or modified organic polyisocyanates with b) one or more higher molecular weight polyhydroxyl compounds, c) one or more chain extenders and/or crosslinking agents, in the presence of d) one or more reaction accelerators or catalysts, e) an active ingredient mixture comprising a carbodiimide derivative and a lactone derivative, as well as f) optionally, other auxiliary agents and additives, wherein component a) and/or b) contains a hydrolytically cleavable ester polyol component, and the addition of the active ingredient combination e) to the reaction mixture results in a content of the selected lactone of 0.5 to 20.0% by weight, and in a content of the selected derivative containing carbodiimide groups of 0.2 to 4.0% by weight.