Patent ID: 6841602

Claim:
A mixture comprising (1) a cross-linkable thermosetting resin providing composition and intimately admixed therewith, (2) from about 0.01 to 5%, by weight, based on the weight of the mixture of an additive comprising a polyfluoroalkylsiloxane, said additive having a lower surface energy than that of the thermoset resin formed by cross-linking said composition; said additive being a polyfluoroalkylsiloxane having the formula: wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 and R 7 may be the same or different and may be alkyl, cycloalkyl or aryl; R 7 may also be —(CH 2 )-mCF 3; m is an integer from 0 to 20, and n is an integer from 1 to 5,000; or a silanol terminated derivative of said polyfluoro-alkylsiloxane; wherein the concentration of said polyfluoroalkylsiloxane through a cross-section of the mixture is lower in the interior thereof and higher at the surfaces thereof.