| abstract |
1520421 Polyoxyethylene-silalkylsilanes DOW CORNING Ltd 9 Oct 1975 [19 Oct 1974] 45364/74 Heading C3S Novel silanes wherein each R is CH3- C2H5- C3H7- or CF3C2H4-, at least 50% of the radicals R being CH3-, R<1> is a C1-6 alkyl radical, R<11> is a C2-6 divalent aliphatic radical having at least two carbon atoms directly between Q and the Si atom, X is H, R<111>, -COR<111> or -CO-OR<111>, R<111> is a C1-5 alkyl radical, a is 1 or 2, b is 2 or 3 and c is 3-12, may be prepared by addition of the hydride to the polyethylene glycol ether YO(C2H4O)cX, wherein Y is a C2-6 terminally olefinically unsaturated aliphatic hydrocarbon radical, in the presence of a catalyst for the reaction. In the Examples the silane is added to the alkyl polyethers and Uses.-Antifoam agents. |