| 摘要 |
PURPOSE:To obtain the titled polymer, having excellent heat resistance, mechanical and electrical characteristics, etc., and suitable as composite and electrical insulating materials, adhesives, etc., by reacting an organic polyfunctional isocyanate with an organic polyfunctional carboxylic acid (anhydride) using a specific catalyst. CONSTITUTION:(A) An organic polyfunctional isocyanate (e.g. diisocyanatoe thane) and (B) an organic polyfunctional carboxylic acid (anhydride) (e.g. malonic acid) are dissolved in, e.g. an inert organic solvent (e.g. N,N- dimethylacetamide) and then (C) an alkali metal fluoride (e.g. lithium fluoride) and (D) a crown compound (e.g. dibenzo-14-crown-4) as a catalyst are added to carry out reaction at 20-250 deg.C in an atmosphere of an inert gas, e.g. nitro gen, to afford the aimed polymer.
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