Polyether alcohols bearing alkoxysilyl groups by alkoxylation of epoxy-functional alkoxysilanes over double metal cyanide (DMC) catalysts, and processes for preparation thereof

A polyether structure of formula (VIII)

• wherein
• a is an integer of from 1 to 3,
• b is an integer of from 0 to 3, wherein the sum of a and b is 3,
• c is an integer of 0 to 18,
• d is an integer of from 4 to 20,
• e is an integer of from 1 to 500,
• f is an integer of from 0 to 30,
• g is an integer of from 0 to 70,
• h, i and j are integers of from 0 to 100, and wherein fragments with the indices d to j are freely permutable with one another,
• and wherein
• R is linear or branched alkyl radicals having 1 to 20 carbon atoms or haloalkyl groups having 1 to 20 carbon atoms, and
• R1 is an alkoxy, arylalkoxy, alkylarylalkoxy a polyetheralkoxy radical or a multiply fused phenolic group,
• R2 and R3, and R5 and R6, are each H or a hydrocarbon radical having 1 to 20 carbon atoms, where the R5 and R6 radicals are hydrocarbon radical and the hydrocarbon radical may be bridged cycloaliphatically via the fragment Y, where
• Y may be absent or is a methylene bridge having 1 or 2 methylene units, with the proviso that, when Y is absent, the R2 or R3 radicals are each independently a linear or branched hydrocarbon radical having 1 to 20 carbon atoms,
• R4 is a linear or branched alkyl radial of 1 to 24 carbon atoms or an aromatic or cycloaliphatic radical which is bonded to a glycidyloxypropyl group which is bonded via an ether or ester function,
• n is an integer of 2 to 8 and R7 and R8 are each independently hydrogen, alkyl, alkoxy, aryl, or aralkyl groups, and
• R9, R10, R11 and R12 are each independently hydrogen, alkyl, alkenyl, alkoxy, aryl or aralkyl groups, where the alkyl radical or alkenyl radical may be bridged cycloaliphatically or aromatically via the Z fragment, where Z may be either a divalent alkylene radical or alkenylene radical.