POLYMER/ISOCYANATES

摘要

Novel improved polymer/polyisocyanate composition made by polymerizing acrylonitrile alone or with one or more ethylenically unsaturated monomer in situ in a polyisocyanate. The polyisocyanate comprises a diarylalkylene diisocyanate. a polymeric diarylalkylene polyisocyanate; a quasi-prepolymer of a diarylalkylene diisocyanate or a polymeric diarylalkylene diisocyanate with an active hydrogen organic compound having at least two active hydrogen atoms per molecule; a mixture of a diarylalkylene diisocyanate, its carbodiimide and its trifunctional trimeric cycloadduct; or a mixture of two or more such polyisocyanates, to form a highly stable dispersion of small polymer particles in said polyisocyanate. The novel compositions are highly useful in the production of polyurethane products.