Process for the preparation of modified polyether polyols

Details Process for the preparation of modified polyether polyols Process for the preparation of modified polyether polyols

C - Chemistry, Metallurgy

08

L

400/103, 400/201

C08L 51/08 (2006.01) C08F 283/06 (2006.01) C08G 18/63 (2006.01) C08G 18/64 (2006.01) C08L 75/08 (2006.01)

Patent

CA 1121090

ABSTRACT OF THE DISCLOSURE The instant invention is directed to a process for the preparation of modified polyether polyols comprising polymerizing, of from 1 to 50 parts by weight of a mixture of 20 to 100% by weight (based on the total quantity of monomers) of acrylonitrile and 0 to 80% by weight of sturene on 50 to 99 parts by weight of the polyether polyol in the the presence of a polymerization initiator which yields radicals, wherein said polymeri- zation is carried out in the presence of from 0.1 to 1.5% by weight, based on the total quantity of monomers put into the process, of a compound of the formula: A = CH - X - R wherein A represents a divalent group Image or Image R prepresents a C1-18 alkyl, C1-10 cycloalkyl, or substituted or unsubstituted benzyl group, R' represents C1-8 alkyl group, n represents 0, 1 or 2 and X represents oxygen or sulfur.

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