Solidification-stable blocked polyisocyanates

• Main Author: THIEBES CHRISTOPH,RICHTER FRANK,HALPAAP REINHARD,BAUMBACH BEATE,MAGER DIETER,FUESSEL CHRISTIAN
• Format: Patent
• Language: English
• Published: 24.10.2007
• Subjects: 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 MACROMOLECULAR COMPOUNDS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF MATERIALS THEREFOR; WOODSTAINS

Storage-stable Polyisocyanates based on aliphatic and/or cycloaliphatic diisocyanates including from 1 to 20% by weight of alkylamino groups of the formula R R N as a constituent of biuret groups, wherein R and R independently of one another are aliphatic or cycloaliphatic C1-C12 alkyl radicals, and where at least 95 mol % of the isocyanate groups are blocked with at least one blocking agent, and the polyisocyanates contain from 4.0 to 21.0% by weight of blocked and free NCO groups (calculated as NCO, molecular weight=42). The polyisocyanates are used to produce coating compositions, coatings, and coated substrates.