| 摘要 |
PROBLEM TO BE SOLVED: To obtain the subject composition good in polyol curability and affording cured products of high resistance to heat and oil by incorporating a specific copolymer with a salt of an organic onium compound and an organic polyhydroxy compound, and a metal oxide and/or metal hydroxide. SOLUTION: This elastic copolymer composition comprises (A) an elastic copolymer composed of pref. 35-65 mol.%, 20-50 mol.% and 0.5-15 mol.% of tetrafluoroethylene-based polymerization unit, propylene-based polymerization unit and vinylidene fluoride-based polymerization unit, respectively, (B) one or more kinds of salt of an organic onium compound (e.g. an organic quaternary ammonium compound such as tetramethylammonium chloride) and an organic polyhydroxy compound [e.g. an aromatic polyhydroxy compound such as 2,2-bis(4-hydroxyphenyl)propane], (C) one or more kinds of metal oxide and metal hydroxide (e.g. an oxide or hydroxide of a bivalent metal such as magnesium, calcium, lead or zinc).
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