Nitrogen-containing compounds suitable for use in the production of polyurethanes
The present invention relates to the use of nitrogenous compounds of formula (I) and/or corresponding quaternized and/or protonated compounds for production of polyurethanes, to compositions comprising said compounds and also to polyurethane systems, in particular polyurethane foams, obtained using said compounds.
1. A process for making a polyisocyanate polyaddition product comprising mixing
(1) from 20 wt % to 95% wt %, the wt % based on the weight of the polyisocyanate polyaddition product, of a nitrogenous compound and/or corresponding quaternized and/or protonated compound and a polyol component with an isocyanate component and a blowing agent and reacting this composition, wherein this nitrogenous compound conforms to formula (III)
wherein the compound of formula (III) by Williamson's ether is synthesised by reacting 2-chloro-methyl ether with an excess of at least two equivalents of pyrrolidine and;
(2) from 0.1 wt % to <30 wt % based on the weight of the polyisocyanate polyaddition product of ingredients including,
a) 1-(2-hydroxyethyl)pyrrolidine,
b) 2-(2-(pyrrolidin-1-yl)ethoxy)ethanol, and
c) 1-(2-(pyrrolidin-1-yl)propoxy)propan-2-ol.
2. The process according to claim 1 , further comprising at least one solvent, wherein the mass ratio of total catalyst of formulae (III) to solvent is in the range from 100:1 to 1:4.