Process for alkylene oxide polymerization

Details Process for alkylene oxide polymerization Process for alkylene oxide polymerization

C - Chemistry, Metallurgy

08

G

402/266

C08G 65/04 (2006.01) C08G 65/12 (2006.01) C08G 65/26 (2006.01)

Patent

CA 1279435

- 52 - PROCESS FOR ALKYLENE OXIDE POLYMERIZATION ABSTRACT OF THE DISCLOSURE The molecular weight of polyalkylene oxides produced by the polymerization of a cyclic oxide in contact with a catalyst comprising the reaction product of a dihydrocarbyl zinc compound and a linear alkanediol in contact with a silica dispersion aid and nonionic surfactant in an inert diluent is controlled by the continuous addition of a very dilute solution of chain transfer agent having a pKa value of from 9 to 22 to the polymerizing mixture during the polymerization reaction at a carefully controlled rate so as not to terminate the polymerization reaction. D-14583

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