Method of preparing thermoplastic random copolymer composition containing zinc oxide and aminosiloxane
A method of preparing a composition containing a fluorocarbon thermoplastic random copolymer comprising the steps of:(a) providing a mixture having:(i) a fluorocarbon thermoplastic random copolymer having subunits of:&#8212;(CH2CF2)x&#8212;, &#8212;(CF2CF(CF3)y&#8212;, and &#8212;(CF2CF2)z&#8212;,&#8195;whereinx is from 1 to 50 or 60 to 80 mole percent,y is from 10 to 90 mole percent.z is from 10 to 90 mole percent.x+y+z equals 100 mole percent;(ii) a filler comprising zinc oxide;(iii) a curable amino functional polydimethyl siloxaie copolymer comprising aminofunctional units selected from tile group consisting of (aminoethylaminopropyl) methyl, ( aminopropyl) methyl and (aminopropyl) dimethyl; and(iv) a bisphenol residue curing agent; and(b) curing the mixture for 3 to 10 hours at a temperature in the range of 220&deg; C. to 280&deg; C. and for an additional 2 to 10 hours at a temperature in the range of 250&deg; C. to 270&deg; C.
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Jiann H. Joseph A. Muhammed Charles C.
Chen Pavlisko Aslam Anderson