| 摘要 |
PURPOSE:To obtain a triblock copolymer excellent in low temperature resistance and chemical resistance, comprising polyfluoroolefin segments and polysiloxane segments. CONSTITUTION:An ABA triblock polysiloxane/polyfluoroolefin block copolymer wherein polyfluorinated segments A are bonded to a polysiloxane segment B through linking parts. Examples of said segments A which can be used include homopolymers and copolymers of a fluoroolefin selected from among vinylidene fluoride, vinyl fluoride, trifluoroethylene, tetrafluoroethylene, chlorotrifluoroethylene, hexafluoropropylene and perfluoroalkyl vinyl ether. Examples of said segments B which can be used include homopolymers and copolymers of a disubstituted siloxane having alkyl groups, fluoroalkyl groups or aryl groups.
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