BLOCKED POLYISOCYANATES, METHOD OF PREPARATION THEREOF, UTILIZATION THEREOF AS COMPONENTS OF PROTECTIVE AND DECORATIVE COATINGS, AND MAGNETIC RECORDING MEDIUM BASED ON BLOCKED POLYISOCYANATES

摘要

FIELD: polymer materials. SUBSTANCE: invention provides blocked polyisocyanates containing isocyanurate, urethan, urea, allophanate, or biuret groups and based on aliphatic and cycloaliphatic diisocyanates and multifunctional protonodonor compounds at their molar ratio from 1.0:1.0 to 1.0: 1.2, respectively. Blocked polyisocyanates are stable upon long- term storage, show low stability, and are prepared according to simple single-stage technology. EFFECT: widened application area for polyisocyanate products. 8 cl, 4 tbl, 8 ex