ADDITIVE ORGANOPOLYSILOXANE COMPOSITION, CURABLE COMPOSITION, AND FILM

• Main Authors: DEHLIN, Lori, BEKEMEIER, Tom, MITCHELL, Tim, RICH, Dave, NG, Sze-Sze, CRAY, Steve
• Format: Patent
• Language: English; French
• Published: 18.07.2019
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; 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; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF MATERIALS AS ADHESIVES; USE OF MATERIALS THEREFOR; WOODSTAINS

An (A) additive organopolysiloxane composition is disclosed which comprises (A1) a branched organopolysiloxane polymer comprising M, D and Q siloxy units and (A2) a silicone resin. The (A) additive organopolysiloxane composition has a content of aliphatically unsaturated groups of from 1.5 to 7.0 wt.%. A curable composition is also disclosed, the curable composition comprising the (A) additive organopolysiloxane composition, (B) an organosilicon compound having at least two silicon-bonded hydrogen atoms per molecule, and (C) a hydrosilylation catalyst. A method of preparing the curable and a method of forming a film with the curable composition are also disclosed. L'invention concerne une composition d'organopolysiloxane additive (A) qui comprend (A1) un polymère organopolysiloxane ramifié comprenant des motifs siloxy M, D et Q et (A2) une résine de silicone. La composition d'organopolysiloxane additive (A) a une teneur en groupes à insaturation aliphatique de 1,5 à 7,0 % en poids. L'invention concerne également une composition durcissable, la composition durcissable comprenant (A) la composition d'organopolysiloxane additive, (B) un composé d'organosilicium ayant au moins deux atomes d'hydrogène liés à du silicium par molécule et (C) un catalyseur d'hydrosilylation. L'invention concerne également un procédé de préparation de la composition durcissable et un procédé de formation d'un film avec la composition durcissable.