Abstract: The present disclosure relates to hydrosilylation curable silicone rubber compositions having polyorganosiloxane cross-linkers containing at least two or at least three terminal silicon bonded hydrogen groups and one or more hydrosilylation cure inhibitor compounds selected from multiacrylates having at least three acrylate groups per molecule. Cured products resulting from the cure of such compositions and which may include elastomeric products are also disclosed. A hydrosilylation curable silicone composition comprises: (A) one or more polyorganosiloxanes containing at least two unsaturated groups per molecule, which unsaturated groups are selected from alkenyl and alkynyl groups and having a viscosity in a range of 1,000 to 200,000 mPa·s at 25° C.; (B) a polyorganosiloxane containing at least two terminal silicon bonded hydrogen groups; (C) at least one hydrosilylation catalyst; and (D) a hydrosilylation cure inhibitor comprising a multiacrylate compound having at least three acrylate groups per molecule.

Abstract: A silicone rubber composition is provided. The composition comprises: (A) a straight chain organopolysiloxane having at least two alkenyl groups in a molecule; (B) a resinous organopolysiloxane containing: SiO4/2 unit, R12R2SiO1/2 unit and R13SiO1/2 unit, wherein R1 independently represents an alkyl group having 1 to 12 carbon atoms and R2 represents an alkenyl group having 2 to 12 carbon atoms, and containing 0.1 to 5.0 mass % of the alkenyl groups; (C) an organopolysiloxane having at least two silicon atom-bonded hydrogen atoms in a molecule; (D) a hydrosilylation reaction catalyst; (E) a reinforcing silica fine powder; and (F) an intumescent flame retardant. When the composition is coated on a woven material, such as a base material for an airbag or the like, the composition can provide the woven material with sufficient flame retardance even with a low coating amount, and the composition can suppress an aperture of the woven material.

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 two-part curable liquid silicone rubber composition is composed of a first liquid composition and a second liquid composition, which are stored separately and yield upon mixing a silicone rubber-forming composition. The silicone rubber-forming composition comprises: (A) a diorganopolysiloxane having an average of at least 2 alkenyl groups in a molecule; (B) a silicon-bonded hydrogen atom-containing organopolysiloxane composed of (B-1) an organopolysiloxane having an average of not more than 2 silicon-bonded hydrogen atoms in a molecule only in side molecular chains and (B-2) an organopolysiloxane having 2 silicon-bonded hydrogen atoms only at both molecular terminals; (C) a calcium carbonate powder; and (D) a platinum-based catalyst. The two-part curable liquid silicone rubber composition provides a cured product with suppressed fluctuations of properties even if the mixing ratio of a first composition and a second composition is changed.

Abstract: A two-part curable liquid silicone rubber composition comprises a first liquid composition and a second liquid composition. The first and second liquid compositions are stored separately and yield, upon mixing, a silicone rubber forming composition. The silicone rubber composition comprises: (A) an alkenyl group-containing organopolysiloxane comprising (A-1) an organopolysiloxane having only a silicon-bonded alkenyl group at each molecular terminal and (A-2) an organopolysiloxane having from 1 to 4 silicon-bonded alkenyl groups in side molecular chains and containing not greater than 2.0 wt. % of alkenyl groups; (B) a calcium carbonate powder; (C) a hydrosilylation reaction catalyst; and (D) an organohydrogenpolysiloxane having silicon-bonded hydrogen atoms.

Abstract: A two-part curable liquid silicone rubber composition comprises a first liquid composition and a second liquid composition. The first and second liquid compositions are stored separately and yield, upon mixing, a silicone rubber forming composition. The silicone rubber composition comprises: (A) an alkenyl group-containing organopolysiloxane comprising (A-1) an organopolysiloxane having only a silicon-bonded alkenyl group at each molecular terminal and (A-2) an organopolysiloxane having from 1 to 4 silicon-bonded alkenyl groups in side molecular chains and containing not greater than 2.0 wt. % of alkenyl groups; (B) a calcium carbonate powder; (C) a hydrosilylation reaction catalyst; and (D) an organohydrogenpolysiloxane having silicon-bonded hydrogen atoms.

Abstract: A silicone rubber composition comprising: (A) a diorganopolysiloxane having with an average of at least two alkenyl groups in one molecule; (B) an organopolysiloxane having with an average of at least two silicon-bonded hydrogen atoms; (C) a calcium carbonate powder; (D) a diorganopolysiloxane capped at both molecular terminals with silanol groups which are free of alkenyl groups and silicon-bonded hydrogen atoms; and (E) a hydrosilylation reaction catalyst, may produce a silicone rubber with initially designed physical properties and adhesion to silicone rubber even after long storage.

Abstract: A silicone rubber composition comprising: 100 parts by mass of a diorganopolysiloxane (A) having on average at least two alkenyl groups in one molecule; 5 to 100 parts by mass of a quartz powder (B) with an average particle size in the range of 0.01 to 3.0 ?m; an organopolysiloxane (C) having on average of at least two silicon-bonded hydrogen atoms in one molecule {the mole ratio of silicon-bonded hydrogen atoms contained in this component to alkenyl groups of component (A) is in the range of 0.5 to 5}; 5 to 100 parts by mass of a calcium carbonate powder (D); and a hydrosilylation catalyst (E) (in an amount sufficient for accelerating the curing of the silicone composition of the present invention).