Abstract: A silicone rubber composition is disclosed. The silicone rubber composition comprises: (A) an organosiloxane having at least two alkenyl groups in each molecule; (B) a silica filler; (C) an organopolysiloxane having at least two silicon atom-bonded hydrogen atoms in each molecule; (D) a hydrosilylation reaction catalyst; and (F) an adhesion promoter. Component (B) is prepared by surface-treating a silica filler with (E) a surface treatment agent in the presence of part or all of component (A). The silicone rubber composition generally exhibits excellent adhesion to various organic resins in contact during curing while simultaneously exhibiting excellent mold releasability with respect to a mold used for the molding thereof.

Abstract: A silicone rubber composition comprises: (A) an organopolysiloxane having at least two alkenyl groups in a molecule and free of an aryl group; (B) (B-1) an organosiloxane having in a molecule at least one aryl group, at least one silicon-bonded hydrogen atom, and free of an alkenyl group, or a mixture of components (B-1) and (B-2) an organosiloxane having in a molecule at least one aryl group and at least one alkenyl group; (C) an acrylic compound or a methacrylic compound; (D) an organopolysiloxane having at least two silicon-bonded hydrogen atoms in a molecule and free of an aryl group and an alkenyl group; and (E) a hydrosilylation reaction catalyst. The silicone rubber composition exhibits excellent adhesive properties with respect to diverse organic resins it comes into contact with during its cure, and at the same time possesses excellent mold-release properties with respect to metal dies used for its molding.

Abstract: A silicone rubber composition is disclosed. The silicone rubber composition comprises: (A) an organosiloxane having at least two alkenyl groups in each molecule; (B) a silica filler; (C) an organopolysiloxane having at least two silicon atom-bonded hydrogen atoms in each molecule; (D) a hydrosilylation reaction catalyst; and (F) an adhesion promoter. Component (B) is prepared by surface-treating a silica filler with (E) a surface treatment agent in the presence of part or all of component (A). The silicone rubber composition generally exhibits excellent adhesion to various organic resins in contact during curing while simultaneously exhibiting excellent mold releasability with respect to a mold used for the molding thereof.

Abstract: A silicone rubber composition comprises: (A) an organopolysiloxane having at least two alkenyl groups in a molecule and free of an aryl group; (B) (B-1) an organosiloxane having in a molecule at least one aryl group, at least one silicon-bonded hydrogen atom, and free of an alkenyl group, or a mixture of components (B-1) and (B-2) an organosiloxane having in a molecule at least one aryl group and at least one alkenyl group; (C) an acrylic compound or a methacrylic compound; (D) an organopolysiloxane having at least two silicon-bonded hydrogen atoms in a molecule and free of an aryl group and an alkenyl group; and (E) a hydrosilylation reaction catalyst. The silicone rubber composition exhibits excellent adhesive properties with respect to diverse organic resins it comes into contact with during its cure, and at the same time possesses excellent mold-release properties with respect to metal dies used for its molding.

Abstract: A liquid silicone rubber composition comprising an alkenyl group-containing liquid organopolysiloxane, a reinforcing silica filler, an organohydrogenpolysiloxane, a platinum group catalyst, a liquid organopolysiloxane that is free of crosslinking groups and is compatible with the alkenyl group-containing liquid organopolysiloxane, and a liquid organopolysiloxane that is free of crosslinking groups and is incompatible with the alkenyl group-containing liquid organopolysiloxane, wherein the cured material therefrom has a JIS type A durometer hardness of 15 to 26 and a tensile stress at 100% elongation of 0.25 to 0.60 MPa. Also, a through hole-containing sealing member comprising this cured material.

Abstract: The present invention provides a polyurethane which is non-sticky, exhibits superior handling properties and superior moldability, and has superior adhesive properties with silicones even if a surface activation treatment is not carried out beforehand. The polyurethane of the present invention contains polyol units and organic polyisocyanate units. The polyol units contain an alkenyl group-containing organopolysiloxane structure in an amount ranging from 0.01 to 20% by weight with respect to the weight of the aforementioned polyurethane.

Abstract: A liquid silicone rubber composition comprising an alkenyl group-containing liquid organopolysiloxane, a reinforcing silica filler, an organohydrogenpolysiloxane, a platinum group catalyst, a liquid organopolysiloxane that is free of crosslinking groups and is compatible with the alkenyl group-containing liquid organopolysiloxane, and a liquid organopolysiloxane that is free of crosslinking groups and is incompatible with the alkenyl group-containing liquid organopolysiloxane, wherein the cured material therefrom has a JIS type A durometer hardness of 15 to 26 and a tensile stress at 100% elongation of 0.25 to 0.60 MPa. Also, a through hole-containing sealing member comprising this cured material.

Abstract: The present invention provides a polyurethane which is non-sticky, exhibits superior handling properties and superior moldability, and has superior adhesive properties with silicones even if a surface activation treatment is not carried out beforehand. The polyurethane of the present invention contains polyol units and organic polyisocyanate units. The polyol units contain an alkenyl group-containing organopolysiloxane structure in an amount ranging from 0.01 to 20% by weight with respect to the weight of the aforementioned polyurethane.

Abstract: A mouldable silicone gel composition that forms a low compression set silicone gel that exhibits an excellent mould releasability comprising: A, 100 parts by weight of an organopolysiloxane having at least two alkenyl groups in each molecule, B, an organopolysiloxane having at least two silicon-bonded hydrogen atoms in each molecule, in an amount such that the molar ratio of silicon bonded hydrogen atoms in component B to alkenyl groups in component A is from 0.5:1 to 10: 1, C 100 to 500 parts by weight of organopolysiloxane whose molecule is free of both alkenyl groups and silicon bonded hydrogen, and D a platinum group catalyst, in an amount sufficient to effect the cure of the composition.

Abstract: A moldable silicone gel composition that forms a low compression set silicone gel that exhibits an excellent mold releasability. The composition comprises the following components: A, 100 parts by weight of an organopolysiloxane having at least two alkenyl groups in each molecule, B, an organopolysiloxane having at least two silicon-bonded hydrogen atoms in each molecule, in an amount such that the molar ratio of silicon bonded hydrogen atoms in component B to alkenyl groups in component A is from 0.5:1 to 10:1, C 100 to 500 parts by weight of organopolysiloxane whose molecule contains which is free of both alkenyl groups and silicon bonded hydrogen, and D a platinum group catalyst, in an amount sufficient to effect the cure of the composition.

Abstract: An ink composition for silicone rubber comprising

Abstract: A silicon rubber composition for insert molding or two-cavity molding comprising from 0.01 wt % to 10 wt % of a phenolic compound having at least one alkoxy group and at least one alkenyl group per molecule.

Abstract: The present invention relates to a curable silicone composition comprising (A) an alkenyl-functional organopolysiloxane, (B) a siloxane-modified acrylic polymer, (C) an organohydrogenpolysiloxane, and (D) a hydrosilylation reaction catalyst. The curable silicone compositions of this invention cure into a highly oil-resistant and highly wear-resistant coating and are useful as base compositions for inks for silicone moldings, and are also useful for imparting release against pressure sensitive adhesives while maintaining a degree of printability.