| 摘要 |
PURPOSE:A resin composition excellent in wettability to teeth and mucosa and dimensional stability and suitable as, for example, a dental impression material, containing a specified blocked isocyanate compound, a compound having at least two active hydrogen atoms and a filler. CONSTITUTION:A composition based on a blocked isocyanate compound obtained by reacting (i) a urethane prepolymer having at lest two free -NCO groups in the molecule, obtained by a reaction between a polyisocyanate and a polyol of an average MW<=400 with (ii) a heterocyclic compound having a skeleton of the formula in the molecule, is mixed with a composition containing a compound having at least two active hydrogen atoms, a film and, if necessary, water. Examples of the polyols which can be particularly suitably used include addition polymers of at least one kind of a 2-6C alkylene oxide (including a cyclic ether) having an average MW of 500-20,000. Examples of the active hydrogen- containing compounds which can be particularly suitably used include polyglycerin and polyvinyl alcohol.
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