Fluorinated diester melt additives for thermoplastic polymers

A composition for providing repellency to low surface tension fluids comprising at least one thermoplastic polymer selected from the group consisting of polyolefin, polyester, polyamide and polyacrylate, and at least one compound or mixture selected from the group consisting of

• I) a compound of formula A
• Rf—O—C(O)—(CH2)n—C(O)—O—R1 A
• wherein
• Rf is selected from the group consisting of
• 1) F(CF2)x—(CH2)m wherein x is from about 4 to about 20, and m is from about 2 to about 6;
• and
• 2) F(CF2)x—SO2N(R3)—R4 wherein x is a positive integer of from about 4 to about 20;
• R3 is an alkyl radical of from about 1 to about 4 carbon atoms;
• and R4 is an alkylene radical of from about 1 to about 12 carbon atoms;
• R1 is a saturated aliphatic hydrocarbon having from about 12 to about 66 carbon atoms;
• and
• n is 1 to about 20;
• II) a compound of formula B
• Rf—O—C(O)—CH2—CH(R2)—C(O)—O—Rf B
• wherein
• each Rf is as defined above for formula A, and
• R2 is a saturated or unsaturated hydrocarbon having from 1 to about 30 carbon atoms;
• III) a mixture C comprising
• 1) at least one compound of formula A
• Rf—O—C(O)—(CH2)n—C(O)—O—R1 A
• 2) at least one compound of formula D
• Rf—O—C(O)—(CH2)n—C(O)—O—Rf D and
• 3) at least one compound of formula E
• R1—O—C(O)—(CH2)n—C(O)—O—R1 E
• wherein
• each Rf, R1, and n are as defined above for formula A;
• and
• IV) a compound of formula F
• [F(CF2)xCH2CH2—S—CH2]2—C—[CH2—O—C(O)—C17H35]2 F
• wherein x is from about 4 to about 20.