Base materials for Mold making, particularly in Dentistry, his compositions for making Moulds on the basis of the same and Process for the production of these materials

摘要

The invention provides impression materials for use in dentistry comprising the reaction product of (a) a diisocyanate or triisocyanate, (b) a dihydroxy compound having a molecular weight of from 300 to 10,000 and (c) an unsaturated monohydroxy compound. The invention also includes processes for preparing said impression materials.