Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Jeffrey F. Dormish0
Karl W. Haider0
Rick V. Starcher0
Edwin R. Hortelano0
Irene L. Yano0
James Y. J. Chung0
Date of Patent
November 16, 2010
0Patent Application Number
116541730
Date Filed
January 17, 2007
0Patent Primary Examiner
Patent abstract
A method of making a polyether-polydialkylsiloxane block copolymer is provided. The method comprises providing a mixture comprising at least one alkylene oxide and at least one silanol-terminated polydialkylsiloxane; and polymerizing the mixture in the presence of a double metal cyanide complex catalyst, and optionally in the presence of an aprotic solvent and/or an antioxidant. A polyether-polydialkylsiloxane block copolymer having a molecular weight of 150-50,000 g/mole and having a polydispersity index of 1.0 to 1.5 made by the above method is also provided.
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