New polyether alcohols containing organosiloxane groups by means of alkoxylisation of epoxide functional (poly) organosiloxanes to double metal cyanide (DMC) catalysts and method for its production

摘要

Process for producing polyethersiloxane compound (VI) comprises alkoxylation of epoxide function containing (poly)organosiloxanes in the presence of double metal cyanide (DMC) catalyst. Process for producing polyethersiloxane compound of formula (VI) comprises alkoxylation of epoxide function containing (poly)organosiloxanes in the presence of double metal cyanide (DMC) catalyst. A : a silicon group of formula (-Si(R) 2-(O-Si(R) 2) a+b-O-(Si(R)(O-(Si((R) 2)-O) d-Si((R) 2)-R)-Si((R) 3)-O) c-Si((R) 3)) (VIa) or (-Si(R)(O-Si((R) 3))-(O-Si(R) 2) b-O-(Si(R)(O-(Si((R) 2)-O) d-Si((R) 3))-O) c-Si((R) 3)) (VIb); a : 0-5; b : 0-500; c : 0-50; d : 0-200; e : 0-18; f : 1-200; g : 0-10000; and h : 0-1000, where: the fragments with the indices f, g and h are permutable with each other freely and are interchangeable within the polyether chain, and the different monomer units with index numbers, f, g and h are formed in blocks or subjected to a statistical distribution. An independent claim is included for the polyethersiloxane compound (VI) produced by the above process, in which the fragment with the index g is in an excess molar ratio against the fragment with the index f, where the polyether siloxane (VI) is free of excess polyethers with f value of 0. [Image].