Antifoam for compositions compatible with silicon oil

Details Antifoam for compositions compatible with silicon oil Antifoam for compositions compatible with silicon oil

B - Operations, Transporting

01

F

134/56

B01F 3/08 (2006.01) B01D 19/04 (2006.01) C08L 83/04 (2006.01)

Patent

CA 1093929

ABSTRACT An antifoam composition for reducing foaming tendencies in lubricating oil compositions is described which com- prises a major portion of (A) poly(dimethylsiloxane) having the general formula: Image wherein R is a methyl group and n has a value such that the average viscosity at 25°C is between 5?? and 500??, and a major amount finely dispersed therein of (B) perfluoroalkylpolyether of the formula: F- [CF(CF3)CF20 ]xC2F5 in which x has a value of from 10 to 41. A method of dispersing such perfluoroalkylpolyether in a lubricating oil is also described.

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