Abstract: A multi-component type curable silicone rubber composition includes: (A) 100 parts by weight of an organopoly-siloxane capped at molecular terminals with an alkoxy group or silanol group, (B) 0.5 to 20.0 parts by weight of an organic compound having at least two alkoxysilyl groups within single molecule and including a non-silicon-oxygen bond between the silyl groups, (C) 0.05 to 2.0 parts by weight of water, and (D) a catalytic amount of a curing catalyst. The multi-component type curable silicone rubber composition is composed of multiple separately stored compositions.

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).

Abstract: An adhesive for silicone rubber, comprising at least the following: A 100 parts by weight of an organopolysiloxane having an average of two or more alkenyl groups per molecule; B an organopolysiloxane having an average of two or more silicon bonded hydrogen atoms in each molecule, used in an amount such that the molar ratio of silicon bonded hydrogen atoms in component B to alkenyl groups in component A at which the molar ratio of the silicon bonded hydrogen atoms in this component to the alkenyl groups in component A is from 0.01 to 20 (i.e. from 1:100 to 20:1); C from 5 to 200 parts by weight of calcium carbonate powder with a BET specific surface area of from 5 to 50 m2g; and D a platinum-based catalyst, used in an amount capable of inducing curing in the present composition.

Abstract: An adhesive for silicone rubber, comprising at least the following: A 100 parts by weight of an organopolysiloxane having an average of two or more alkenyl groups per molecule; B an organopolysiloxane having an average of two or more silicon bonded hydrogen atoms in each molecule, used in an amount such that the molar ratio of silicon bonded hydrogen atoms in component B to alkenyl groups in component A at which the molar ratio of the silicon bonded hydrogen atoms in this component to the alkenyl groups in component A is from 0.01 to 20 (i.e. from 1:100 to 20:1); C from 5 to 200 parts by weight of calcium carbonate powder with a BET specific surface area of from 5 to 50 m2g; and D a platinum-based catalyst, used in an amount capable of inducing curing in the present composition.

Abstract: A silicone rubber composition comprising

Abstract: A silicone rubber composition comprising (A) 100 weight parts of a polydiorganosiloxane mixture comprising (i) 1 to 99 wt % polydiorganosiloxane having at least two silicon atom-bonded vinyl groups per molecule and (ii) the remaining percentage of polydiorganosiloxane having at least two non-vinyl silicon atom-bonded alkenyl groups per molecule, (B) a polyorganosiloxane having at least two silicon atom-bonded hydrogen atoms per molecule, (C) 0.

Abstract: A Heat-curable silicone rubber composition comprising (A) 100 weight parts organopolysiloxane with the average unit formula RXSiO(4−x)/2 each R is independently selected from the group consisting of hydroxyl and substituted and unsubstituted monovalent hydrocarbon groups and x has a value from 1.9 to 2.1 and containing at least 2 silicon-bonded alkenyl groups in each molecule, (B) 10 to 100 weight parts reinforcing filler, (C) 0.1 to 10 weight parts carboxiloxane dendrimer that contains at least 3 silicon-bonded hydrogen atoms in each molecule, and (D) 0.1 to 10 weight parts organoperoxide.

Abstract: A silicone rubber composition for application as electrical insulation that cures into a highly water-resistant silicone rubber that has excellent electrical properties and in particular has excellent high-voltage electrical insulation properties. The silicone rubber composition comprises(A) polyorganosiloxane,(B) surface-treated aluminum hydroxide powder surface treated with an organosilane or organosilazane, and(C) curing agent.Also, the composition afforded by the addition of 1 to 200 weight parts (D) microparticulate silica to components (A) to (C).

Abstract: A silicone rubber composition comprising(A) polyorganosiloxane described by average formula R.sub.a SiO.sub.(4-a)/2, where R denotes substituted and unsubstituted monovalent hydrocarbon groups and a is a number from 1.95 to 2.05 and having at least 2 silicon-bonded alkenyl groups in each molecule;(B) microparticulate silica;(C) the reaction mixture of(a) a platinum compound and(b) an organosilicon compound described by general formula ##STR1## where R.sup.1, R.sup.2, and R.sup.3 represent C.sub.1 to C.sub.10 monovalent hydrocarbon groups and a is 1, 2, or 3;(D) curing agent, and optionally(E) triazole compound.

Abstract: A silicone rubber composition that cures into a highly flame-retardant silicone rubber with excellent electrical insulation characteristics and that does so without sacrificing mechanical strength. The silicone rubber composition comprises:(A) polyorganosiloxane described by average formula R.sub.a SiO.sub.(4-a)/, where R denotes substituted and unsubstituted monovalent hydrocarbon groups and a is a number from 1.95 to 2.05 and having at least 2 silicon-bonded alkenyl groups in each molecule;(B) microparticulate silica;(C) the reaction mixture of(a) a platinum compound and(b) a compound containing a carbon-carbon double bond and a carbon-carbon triple bond;(D) curing agent, and optionally(E) a triazole compound.

Abstract: A heat-curable silicone rubber composition whose cure provides silicone rubber with excellent high-voltage electrical insulating properties. The heat-curable silicone rubber composition comprises:(A) polyorganosiloxane gum described by average compositional formulaR.sub.a SiO.sub.(4-a)/2,where R represents substituted and unsubstituted monovalent hydrocarbon groups and a is a number from 1.95 to 2.05 and that contains at least 2 silicon-bonded alkenyl groups in each molecule,(B) microparticulate silica,(C) zinc carbonate powder or basic zinc carbonate powder, and(D) organoperoxide.

Abstract: A curable silicone rubber composition comprising (A) organopolysiloxane comprising at least 2 silicon atom-bonded alkenyl groups in each molecule described by formula R.sub.a SiO.sub.(4-a)/2, where R represents a substituted or unsubstituted monovalent hydrocarbon group and a is a number from 1.95 to 2.05; (B) fine powdery silica; (C) a reaction mixture of (a) a platinum compound and (b) a compound containing an alkynyl group and an alcoholic hydroxy group in each molecule; and (D) a curing agent. The present invention is also a manufacturing method of curable silicone rubber composition. The curable silicone rubber compositions have an excellent flame-retarding property and good tracking resistance and other electrical properties.

Abstract: The present invention is silicone rubber compositions the exhibit high mechanical strength and excellent electrical properties such as tracking resistance, arc resistance, and erosion resistance. The improved properties are obtained by incorporation in the compositions aluminum hydroxide powder which has been treated with a treating agent selected from the group consisting of silanes and siloxanes having alkenyl and alkoxy or hydroxy substitution.

Abstract: A pressure-sensitive adhesive having an excellent tack and adhesive strength is obtained from a composition which comprises an organic solvent solution of an alkenyl group-containing silicone polymer having a gum-like consistency, a tackifying silicone resin, a curing agent for the alkenyl group-containing silicone polymer and a platinum-containing catalyst. The composition can be cured by heating at relatively low temperatures.