Polyisocyanates containing allophanate groups based on diphenylmethane diisocyanate with predominantly or completely blocked isocyanate groups

• Main Authors: KOBELKA FRANK, SCHMALSTIEG LUTZ DR, PEDAIN JOSEF DR, ENGBERT THEODOR DR, CASSELMANN HOLGER DR
• Format: Patent
• Language: Czech; English
• Published: 16.10.2002
• Edition: 7
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOSITIONS BASED THEREON; CORRECTING FLUIDS; DYES; FILLING PASTES; INKS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC CHEMISTRY; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF MATERIALS THEREFOR; WOODSTAINS

Polyizokyan ty na b zi difenylmethandiizokyan tu s nejm n 95 % blokovan²ch izokyan tov²ch skupin, zp sob jejich v²roby a jejich pou it jako zes uj c ch prost°edk do polyurethanov²ch vypalovac ch lak .\ In the present invention there are disclosed polyisocyanates based on diphenylmethane diisocyanate with at least 95 percent of blocked isocyanate groups, process of their preparation and their use as crosslinking agents used in polyurethane stoving enamels.