Patent ID: 8906974
Filing Date: 2014-12-09
Classification: C08G,C08J,C08L

Abstract:
1. A method for producing polyurethane foams comprising reacting at least one organic isocyanate containing two or more isocyanate functions, at least one polyol containing two or more isocyanate-reactive groups, and a blowing agent consisting of at least one halogenated olefin and at least one siloxane of formula (I): a in each occurrence independently is from 1 to 300, b in each occurrence independently is from 1 to 50, c in each occurrence independently is >0 to 4, d in each occurrence independently is >0 to 4, with the proviso that, per molecule of formula (I), the average number Σd of T-units and the average number Σc of Q-units per molecule are neither greater than 20, the average number Σa of D-units per molecule is not greater than 1500 and the average number Σb of R R in each occurrence independently is one or more than one moiety selected from the group consisting of linear, cyclic or branched, aliphatic or aromatic, saturated or unsaturated hydrocarbon moieties having 1 up to 20 carbon atoms, R R