PURPOSE: To obtain a mixture excellent in fuel resistance and hardness from a predetermined amt. of a specific thermoplastic polydiorganosiloxane/ polycarbonate block copolymer and a predetermined amt. of polytetrafluoroethylene.
CONSTITUTION: This mixture is constituted of 80-99 wt.% of a thermoplastic polydiorganosiloxane/polycarbonate block copolymer produced form α,ω-bis- hydroxyaryloxypolydiorganosiloxane with a polymerization degree of 5-100 [e.g.; compd. represented by formula (wherein R is 1-3C alkyl, n- and t-butyl or phenyl and (m) is 5-100)] with an average mol.wt. of 10,000-200,000, aromatic carbonate structural unit content of 70-99 wt.% and diorganosiloxane unit content of 30-1% and 20-1 wt.% of a polytetrafluoroethylene polymer with an average particle size of 0.1-700 μm and a number average mol.wt. of 4,000-900,000.
BERUNAA NOUFUERUTONE
FURANTSUUYOZEFU GIIREN
PEETAA TATSUKE
