Patent ID: 9096717
Filing Date: 2015-08-04
Classification: C08G,C08L,C09D

Abstract:
1. A process for the preparation of a polyol mixture comprising polyether carbonate polyol A) and polyol containing urethane groups B), wherein (i) in a first step a crude mixture containing the polyether carbonate polyol A) and a cyclic carbonate is formed by copolymerization, wherein one or more alkylene oxides and carbon dioxide are added on to one or more H-functional starter substances in the presence of at least one double metal cyanide (DMC) catalyst, wherein and (ii) in a second step at least one amino-functional substance is added to the crude mixture formed in step (i) and is reacted with the cyclic carbonate formed in step (i) to form the polyol containing urethane groups B), wherein the reaction according to step (ii) is carried out at temperatures of between 0 and 150° C.