Light-resistant coating

• Main Authors: PEERLINGS, HENRICUS, GERTZMANN, ROLF
• Format: Patent
• Language: English; French; German
• Published: 31.08.2011
• 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

Anionically hydrophilized polyurethane-polyurea-polymer (G1) comprising at least one isocyanate prepolymer including at least one diisocyanate (20-60 wt.%), at least one macrodiol (20-80 wt.%), at least one 2,2-bis-(hydroxymethyl)-alkane-monocarboxylic acid (2-12 wt.%), at least one short-chain diol (0-15 wt.%), at least one monofunctional alcohol (0-10 wt.%), at least one N-(2-aminoalkyl)-2-aminoalkylsulfonic acid (0.5-10 wt.%), at least one diamine (0-15 wt.%), at least one monofunctional amine (0-10 wt.%), water (0-3 wt.%), and at least one neutralizing agent (0-10 wt.%), is new. Anionically hydrophilized polyurethane-polyurea-polymer (G1) comprising at least one isocyanate prepolymer including at least one diisocyanate (20-60 wt.%), at least one macrodiol (20-80 wt.%) having a number average molecular weight of 500-10000, at least one 2,2-bis-(hydroxymethyl)-alkane-monocarboxylic acid (2-12 wt.%), at least one short-chain diol (0-15 wt.%) having a number average molecular weight of 62-400, at least one monofunctional alcohol (0-10 wt.%) having a number average molecular weight of 32-350, at least one N-(2-aminoalkyl)-2-aminoalkylsulfonic acid (0.5-10 wt.%), at least one diamine (0-15 wt.%) having a molecular weight of 60-300, at least one monofunctional amine (0-10 wt.%), water (0-3 wt.%), and at least one neutralizing agent (0-10 wt.%), is new. In prepolymer stage a), the isocyanate content is adjusted to 65-85% of the calculated isocyanate content. The sum of 2,2-bis-(hydroxymethyl)-alkane-monocarboxylic acid and N-(2-aminoalkyl)-2-aminoalkylsulfonic acid is 3-15 wt.%. The ratio of 2,2-bis-(hydroxymethyl)-alkane-monocarboxylic acid to N-(2-aminoalkyl)-2-aminoalkylsulfonic acid is 6:1 to 1:1. An independent claim is included for preparation of the polymer (G1). Die vorliegende Erfindung betrifft neue recyclisierbare Abziehlacke basierend auf colösarfreien, wässrigen, lichtechten, anionischen Polyurethanpolyharnstoffen, Verfahrenen zu ihrer Herstellung und ihre Verwendung als Lack, vorzugsweise als Abziehlack zum temporären Schutz von Kraftfahrzeugen, Flugzeugen, Stahl- und Aluminiumprofilen, Glas- und Kunststotischeiben und beliebigen anderen Substraten und Verfahren zur Wiederverwertung der gebrauchten abgezogenen Lackschichten.