摘要:
The present invention relates to hydrophobic polyetherester polyols, to a process for preparing them, and to the use of the polyetherester polyols of the invention for producing polyurethanes.
摘要:
The present invention relates to a process for preparing polyether polyols, in which at least one hydroxyl-comprising fatty acid ester and/or at least one hydroxyl-modified fatty acid ester is reacted with the aid of a double metal cyanide catalyst in at least two process sections with in each case a mixture of ethylene oxide and at least one further alkylene oxide different from ethylene oxide.
摘要:
The invention relates to a polyetherester polyol comprising the reaction product of a1) 5 to 63 wt % of one or more polyols or polyamines or mixtures thereof having an average functionality of 2.5 to 8, a2) 2 to 50 wt % of one or more fatty acids, fatty acid monoesters or mixtures thereof, a3) 35 to 70 wt % of one or more alkylene oxides of 2 to 4 carbon atoms.
摘要:
The present invention relates to a process for producing polyurethane (PU) rigid foams by reaction of polyisocyanates with compounds having two or more isocyanate-reactive hydrogen atoms in the presence of blowing agents.