Particle-comprising polyether alcohols

摘要

The invention relates to particle-comprising polyether alcohols which can be prepared by in-situ polymerization of olefinically unsaturated monomers in a polyether alcohol, wherein the polymerization is carried out in the presence of at least one compound (A) comprising a polysiloxane chain to which at least one polyether chain comprising at least one reactive hydrogen atom and a polyether chain comprising at least one olefinic double bond are bonded.

主权项

1. A particle-comprising polyether alcohol produced by a process comprising performing an in-situ polymerization of at least one olefinically unsaturated monomeric compound in a polyether alcohol as a carrier polyol, wherein:
the in-situ polymerization is carried out in the presence of at least one macromer which is distinct from the carrier polyol, said macromer comprising a polysiloxane chain to which at least one polyether chain comprising at least one reactive hydrogen atom and a polyether chain comprising at least one olefinic double bond are bonded; the at least one macromer is represented by formula (I): where x, y and z are all greater than zero; A, B and C are arranged randomly and x, y and z are selected such that a ratio of a molecular weight of the polysiloxane chain to a total molecular weight of the macromer is from 0.25:1 to 0.65:1; Me is a methyl group; R is an alkyl group having from 1 to 10 carbon atoms; M is an alkylene or arylene group or araliphatic group having from 2 to 10 carbon atoms, which is optionally bound to a polyether chain via an ether, ester, urethane, carbonate or acetal bond; m, n are integers which are selected such that molecular weight Mn of each unit A ranges from 500 to 2000 and molecular weight Mn of each unit C ranges from 500 to 2000 and a ratio n:m for both of A and C is in a range of from 20:80 to 80:20; and the polysiloxane chain is a polymer backbone of formula: having a molecular weight Mn in a range of from 3000 to 7000, in which x, y and z are defined as above.