Fluorinated lubricants

摘要

Fluorinated lubricants comprising "pour point depressant" additives of structure:

         X<Sub>1</Sub>-O (CF<Sub>2</Sub>O)<Sub>n</Sub>(CF<Sub>2</Sub>CF<Sub>2</Sub>O)<Sub>m</Sub>(CF<Sub>2</Sub>CF<Sub>2</Sub>CF<Sub>2</Sub>O)<Sub>p</Sub>(CF<Sub>2</Sub>CF<Sub>2</Sub>CF<Sub>2</Sub>CF<Sub>2</Sub>O)<Sub>q</Sub>-X<Sub>2</Sub>     (I)

wherein
-X<Sub>1</Sub>, X<Sub>2</Sub>, have formula -(CF<Sub>2</Sub>)<Sub>z</Sub>CF<Sub>3</Sub> wherein z is an integer from 0 to 3; n is an integer between 1 and 200; m is an integer between 0 and 200; p,q are integers between 0 and 10; (p+q)/(p+q+m+n) s 0.05; m/n s 0.7; the number average molecular weight of (I) is between 1,000 and 10,000.