Polyurethane prepolymers based on oleochemical polyols,...

Details Polyurethane prepolymers based on oleochemical polyols,... Polyurethane prepolymers based on oleochemical polyols,...

C - Chemistry, Metallurgy

08

G

403/14, 402/157

C08G 18/76 (2006.01) C08G 18/36 (2006.01) C08G 18/48 (2006.01) C08G 18/66 (2006.01) C08L 75/04 (2006.01)

Patent

CA 1293584

ABSTRACT OF THE DISCLOSURE The invention relates to isocyanate-terminated polyurethane prepolymers containing a stoichiometric excess of an isocyanate compo- nent comprised of one or more aromatic isocyanates containing on aver- age from 2 to 4 isocyanate groups per molecule and a polyol component comprised of an oleochemical polyol prepared by epoxidation of a triglyceride containing olefinic unsaturation and subsequent ring open- ing with an alcohol. In use, accelerators, flameproofing agents, blow- ing agents and, optionally, liquefying agents, dyes and/or stabilizers, are included. The oleochemical polyol does not contain any free epoxide groups and is obtained by complete ring opening of epoxidized triglycerides of a fatty acid mixture containing at least partly olefinically unsaturated fatty acids with one or more C1-C12 alcohols and partial conversion by alcoholysis or transesterification of the triglyceride derivatives to alkyl ester polyols containing from 1 to 12 carbon atoms in the alkyl radical. A process for the production of these polyurethane prepolymers and to their use as starting materials for the production of polyurethane foams is included.

543653

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