| 摘要 |
<p>PURPOSE:To obtain the titled polymer, having excellent impact strength, processable into the form of a sheet and useful as automotive outside sheets, printed circuit boards, etc., by subjecting a cyclic carbonate and polyfunctional isocyanate compound to polymerization reaction using potassium fluoride as a catalyst. CONSTITUTION:The aimed polymer obtained by subjecting a cyclic carbonate (e.g. ethylene carbonate, chloroethylene carbonate or propylene carbonate) and a polyfunctional isocyanate compound (e.g. 2,4-toluylene diisocyanate or 4,4'- diphenylmethane diisocyanate) to polymerization reaction, preferably in the absence of a solvent at ambient temperature - 160 deg.C using potassium fluoride as a catalyst with preferably a cocatalyst (e.g. crown ether or polyethylene glycol) together.</p> |
