Fluorinated diesters useful for imparting repellency of low surface tension
fluids to thermoplastic polymers of formulae
R.sub.f --O--C(O)--(CH.sub.2).sub.n --C(O)--O--R.sub.1 ;
R.sub.f --O--C(O)--CH.sub.2 --CH(R.sub.2)--C(O)--O--R.sub.f ;
a mixture of R.sub.f --O--C(O)--(CH.sub.2).sub.n --C(O)--O--R.sub.1,
R.sub.f --O--C(O)--(CH.sub.2).sub.n --C(O)--R.sub.f, and R.sub.1
--O--C(O)--(CH.sub.2).sub.n --C(O)--O--R.sub.1 ;
and [F(CF.sub.2).sub.x CH.sub.2 CH.sub.2 --S--CH.sub.2 ].sub.2
--C--[CH.sub.2 --O--C(O)--C.sub.17 H.sub.35 ].sub.2 ;
wherein R.sub.f is F(CF.sub.2).sub.x --(CH.sub.2).sub.m wherein x is 4 to
20 and m is 2 to 6, or F(CF.sub.2).sub.x --SO.sub.2 N(R.sub.3)--R.sub.4
wherein x is 4 to 20; R.sub.1 is a saturated aliphatic hydrocarbon with an
average carbon chain length of 12 to 66 carbons; R.sub.2 is a saturated or
unsaturated hydrocarbon with 1-20 carbon atoms; R.sub.3 is an alkyl
radical having 1 to 4 carbon atoms; R.sub.4 is an alkylene radical having
1 to 12 carbon atoms; n is 1 to 20, and x is 4 to 20 are disclosed.
