COMPOSICIONES DE PINTURA TERMOENDURECIBLES

• Main Authors: SHIBATOH, KISHIO, LUER, INGO, NUKITA, AKITO
• Format: Patent
• Language: Spanish
• Published: 01.02.2001
• Edition: 7
• 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

LA INVENCION SE REFIERE A COMPOSICIONES DE PINTURA QUE PERMITEN FORMAR PELICULAS DE PINTURA CON EXCELENTE RESISTENCIA AL ACIDO, A LA INTEMPERIE, AL CALOR Y AL AMARILLEAMIENTO. SE DESCRIBE ASIMISMO UNA COMPOSICION DE PINTURA TERMOENDURECIBLE QUE CONTIENE (A) POLIOL QUE TIENE EN CADA MOLECULA DOS O MAS GRUPOS HIDROXILO SECUNDARIOS, PROTEGIDOS ESTERICAMENTE. DICHO POLIOL SE OBTIENE POR MEDIO DE UNA REACCION DE ESTERIFICACION DE UN COMPUESTO QUE CONTIENE UN GRUPO EPOXI Y QUE NO PRESENTA ENLACES INSATURADOS POLIMERIZABLES, Y DE UN COMPUESTO QUE CONTIENE CARBOXILO, QUE TIENE DOS O MAS GRUPOS CARBOXILO; Y (B) ESTER DE ACIDO 1,3,5 - TRIAZINA - 2,4,6 - TRIS - CARBAMICO, QUE SE PUEDE REPRESENTAR MEDIANTE LA FORMULA GENERAL C 3 N 3 (NHCOOR) 3 O UN OLIGOMERO DEL MISMO, EN DONDE LA RELACION MOLAR DE GRUPOS HIDROXILO SECUNDARIOS QUE SE ORIGINAN A PARTIR DEL COMPONENTE (A) ANTERIORMENTE MENCIONADO: GRUPOS NHCOOR ORIGINADOS A PARTIR DEL COMPONENTE (B) ANTERIORMENTE MENCIONADO EN LA COMPOSICION, ES DE 1:3 A3:1. (EN DICHA FORMULA, R REPRESENTA UN GRUPO ALQUILO QUE TIENE DE 1 A 20 ATOMOS DE CARBONO, UN GRUPO ARILO QUE TIENE DE 6 A 20 ATOMOS DE CARBONO O UN GRUPO ARALQUILO QUE TIENE DE 7 A 20 ATOMOS DE CARBONO.) To obtain paint compositions with which it is possible to form paint films which have excellent acid resistance, weather resistance and heat resistance and which also have excellent yellowing resistance. A heat hardenable paint composition which contains (A) polyol which has in each molecule two or more sterically protected secondary hydroxyl groups, being a polyol obtained by means of an esterification reaction of an epoxy group containing compound which has one epoxy group and which does not have a polymerizable unsaturated bond and a carboxyl group containing compound which has two or more carboxyl groups; and (B) 1,3,5-triazine-2,4,6-tris-carbamic acid ester which can be represented by the general formula indicated below, or an oligomer thereof, wherein the mol ratio secondary hydroxyl groups originating from the aforementioned (A) component:NHCOOR groups originating from the aforementioned (B) component in the composition is from 1:3 to 3:1.General Formula(In this formula, R represents an alkyl group which has from 1 to 20 carbon atoms, an aryl group which has from 6 to 20 carbon atoms or an aralkyl group which has from to 20 carbon atoms.)