End-capped polyalkylene glycols

Details End-capped polyalkylene glycols End-capped polyalkylene glycols

C - Chemistry, Metallurgy

07

C

C07C 43/20 (2006.01) C07C 43/11 (2006.01) C07C 217/76 (2006.01) C07C 323/19 (2006.01) C08G 65/08 (2006.01) C08G 65/26 (2006.01) C08G 65/329 (2006.01) C08G 65/332 (2006.01) C08G 65/334 (2006.01) C08L 71/02 (2006.01) C10M 107/34 (2006.01) C10M 107/44 (2006.01) C10M 107/46 (2006.01) C10M 145/26 (2006.01) C10M 169/04 (2006.01)

Patent

CA 2085958

Case 7800(2) ABSTRACT OF THE DISCLOSURE END-CAPPED POLYALKYLENE GLYCOLS A polyether having the formula RX[(CxH2xO)n(cyH2yO)pZ]m (I) wherein: R is either an alkyl or alkyl phenyl group having from 7 to 30 carbon atoms, X is selected from O, S or N; x is an integer from 2 to 4; y is an integer from 6 to 30; Z is a hydrocarbyl group containing from 1 to 30 carbon atoms; m is 1 when X is O or S or m is 2 when X is N; n and p are such that the polether contains between 1 and 40% by weight of (CyH2yO) units and between 40 and 80% by weight of (CxH2xO) units; and the molecular weight of the polyrther is between 500 and 3,500. Lubricating oil compositions comprising such polyethers are disclosed. A method of preparing the polyethers is disclosed and comprises preparing a H-capped polyether, preparing an alkali-metal salt thereof and reacting said salt with an alkylating agent.

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