COMPOSICION CURABLE DE SILICON PARA PROTECCION CONTRA LA CORROSION

• Main Authors: ANH BE, CHARLES PATRICK ZEMANEK, DIPAK NARULA
• Format: Patent
• Language: Spanish
• Published: 24.12.1992
• Edition: 5
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; CORRECTING FLUIDS; DYES; FILLING PASTES; INKS; 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 INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; USE OF MATERIALS THEREFOR; WOODSTAINS

La presente invención se refiere a una composición curable de silicón, caracterizada porque comprende (I) de aproximadamente 1 a 99 partes en peso de un copolímero de organopolisiloxano líquido, preparado mediante un método que comprende (a) formar una mezcla homogénea que tiene un número de ácido mayor que cero, y que consiste esencialmente de a) una solución de solvente orgánico de un siloxano copolimérico resinoso que contiene radicales hidroxilo unidos al silicio y que consiste esencialmente de unidades R2Si01/2 y unidades Si04/2 en donde la reación de unidades de R3Si01/2 a unidades Si04/s es un radical hidrocarburo monovalente y b) un organohidrógeno polisiloxano líquido en donde cada radical orgánico es, independientemente, un radical hidrocarburo monovalente, habiendo un promedio de por lo menos un radical hidrógeno organohidrógenopolisiloxano. A composition which provides excellent corrosion protection to metals, particularly ferrous metals which are to be exposed to moisture and/or salt, is disclosed. The composition comprises (I) a reaction product (or blend) of a resinous copolymeric siloxane solution with a liquid organohydrogenpolysiloxane, (II) a hydroxy-functional diorganopolysiloxane and (III) an organosilane. The composition may be cured on metal surfaces, either at room temperature or at elevated temperatures, to provide a strongly adhering corrosion protective coating.