Perfluoropolyether lubricants having antiwear properties

Details Perfluoropolyether lubricants having antiwear properties Perfluoropolyether lubricants having antiwear properties

C - Chemistry, Metallurgy

10

M

253/112

C10M 107/38 (2006.01) C10M 107/44 (2006.01) C10M 169/00 (2006.01) C10M 169/04 (2006.01)

Patent

CA 2032023

Lubricating compositions having high antiwear properties and comprising : A) from 100 to 0.1%, preferably from 10 to 0.5% by weight of a polyether of general formula : Image where: T, T' either the same or different from each other are inert end groups -CF2X, -C2F4X, -C3F6X or fluorinated reactive end groups containing carboxylic and/ or alcoholic and/or ketonic and/or amidic and/or aminic and/or alkoxylic, at least one of T and T' being one of said reactive end groups; X - F, Cl; m, n, s, p = integers such that the polyether has an average molecular weight ranging from 1,000 to 100,000, with the proviso that, when none of them is zero, s/p is about 10, s/n ranges from 0.5 to 1.5, n/m is about 10, while when n is zero, s/n is about 10 and s/m is about 20; while when s, p are zero, n/m ranges from 0.6 to 2; B) from 0 to 99.9%, preferably from 90 to 99.5% by weight of a perfluoropolyether having non-reactive end groups. The lubricating compositions of the present invention, can be used, with proper thickening agents, also for formulation of lubricating greases having high antiwear properties.

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