Improving lubricant air release rates

C - Chemistry – Metallurgy – 10 – M

Patent

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Details

C10M 143/12 (2006.01) C10M 129/54 (2006.01) C10M 143/10 (2006.01)

Patent

CA 2658630

The air release rate of lubricating compositions is significantly enhanced when the composition is formulated with one or more vinyl aromatic-olefin block copolymers that forms a micelle-like structure in the oil. Compositions having the specified copolymers retain less than about 2.5% air after 1 min. at 50°C when tested by ASTM D 3427.

La vitesse de désaération de compositions lubrifiantes est notablement améliorée lorsque la composition est formulée avec un ou plusieurs copolymères blocs aromatique vinylique-oléfine qui forment une structure de type micelle dans l'huile. Des compositions comportant les copolymères spécifiés retiennent moins de 2,5% d'air environ au bout d'une minute à 50°C sous test ASTM D 3427.

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