摘要:
In a process for preparing a polyether alcohol d1) by reaction of a) at least one compound having at least three hydrogen atoms reactive with alkylene oxides and a molecular weight Mn of not more than 600 g/mol with b) an alkylene oxide by using c) a catalyst, said reaction is carried out in the presence of a polyether alcohol d) having a hydroxyl number of 100-800 mg KOH/g and a functionality of 1.5 to 8.
摘要:
The invention relates to a process for preparing rigid polyurethane foams, which comprises reacting a) polyisocyanates with b) compounds having at least two hydrogen atoms reactive with isocyanate groups in the presence of c) blowing agents, wherein said compounds having at least two hydrogen atoms reactive with isocyanate groups b) comprise at least one polyether alcohol b1) having a functionality of 2-8 and a hydroxyl number of 200-800 mgKOH/g, obtained by addition of an alkylene oxide b1b) onto a compound having at least two hydrogen atoms b1a), hereinafter also known as starter substances, reactive with alkylene oxides by using an amine b1c) as catalyst.
摘要:
The invention relates to a process for preparing polyurethanes, which comprises reacting a) polyisocyanates with b) compounds having at least two hydrogen atoms reactive with isocyanate groups, wherein said compounds having at least two hydrogen atoms reactive with isocyanate groups b) comprise at least one polyether alcohol b1) having a functionality of 2-8 and a hydroxyl number of 200-600 mgKOH/g, obtained by addition of an alkylene oxide b1b) onto a compound having at least two hydrogen atoms reactive with alkylene oxides by using an amine b1c) as catalyst.
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.