Polyisobutenyl sulfonates having low polydispersity

Details Polyisobutenyl sulfonates having low polydispersity Polyisobutenyl sulfonates having low polydispersity

C - Chemistry, Metallurgy

08

F

C08F 8/36 (2006.01) C08F 6/02 (2006.01) C08F 10/10 (2006.01) C10M 151/02 (2006.01)

Patent

CA 2614456

The present invention provides for polyisobutenyl sulfonates, methods for preparing them, and composition employing them; wherein said polyisobutenyl sulfonates have improved low temperature and high temperature viscometric properties. The polyisobutenyl sulfonates are prepared by sulfonating polyisobutene and reacting the polyisobutenyl sulfonate with an alkali metal or alkaline earth metal, wherein the polyisobutene is characterized by having at least 90 mole percent methyl- vinylidene, a number average molecular weight of about 350 to 5,000, and a ratio of weight average molecular weight to number average molecular weight M w/M n of from about 1.01 to about 1.4.

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