Use of (meth)acrylate ester of organosiloxanepolyols as additive for radiation curable coatings

• Main Authors: EBBRECHT, THOMAS DR, DOEHLER, HARDI, STADTMUELLER, STEFAN DR, SILBER, STEFAN DR
• Format: Patent
• Language: English; French; German
• Published: 08.09.1999
• Edition: 6
• 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

Gegenstand der Erfindung ist die Verwendung von (Meth)Acrylatgruppen enthaltenden Organopolysiloxanen als Additive für strahlenhärtende Beschichtungen. Organopolysiloxanes (I) containing (meth)acrylate groups are useful as an additive at a concentration of 0.01-10 wt.% in radiation curable coatings. Organopolysiloxanes (I) containing (meth)acrylate groups are useful as an additive at a concentration of 0.01-10 wt.% in radiation curable coatings. (I) is prepared by addition of an organopolysiloxane of formula (1) and a polyhydroxyalkenylether of formula (2) to 0.4-1 moles (meth)acrylic acid and 0-0.6 moles of a 2-10C monocarboxylic acid (w.r.t. hydroxyl groups) that is free from polymerizable double bonds, in the presence of a platinum or rhodium catalyst under conventional esterification conditions. R = 1-10C aliphatic or aromatic hydrocarbon; R = R or H whereby at least one R is H; R = 1-20C hydrocarbon, optionally containing ether linkages; a = 0-500; b = 0-5; c = 0-10; and d = 2-10.