Patent ID: 7696264

Claim:
A process for preparing a silicon-containing polytrimethylene homo- or copolyether comprising: providing reactants comprising: (c) polytrimethylene homo- or copolyether ether glycol, wherein from about 50 to 100 mole mole percent of the repeating units of the polytrimethylene homo- or copolyether are trimethylene ether units, and wherein the polytrimethylene homo- or copolyether has an Mw/Mn ratio of 1.7 or greater; and (d) a silicon-containing reactant of the formula: Si(W)(X)(Y)(Z), where W, X and Y are groups that are easily displaceable from silicon by reaction with water and/or alcohols, and Z is selected from the group consisting of: (i) C1-C 20 linear or branched alkyl groups, (ii) cycloaliphatic groups, (iii) aromatic groups, each of (i), (ii) and (iii) being optionally substituted with a member selected from the group consisting of O, N, P and S, (iv) hydrogen, and (v) groups that are easily displaceable from silicon by water and/or alcohol; and contacting said polytrimethylene homo- or copolyether ether glycol reactant in (c) with said silicon-containing reactant in (d) at elevated temperature.