Abstract: A liquid silicone rubber composition for use in high-voltage eletrical insulating parts comprising (A) a polyorganosiloxane containing alkenyl groups, (B) fumed silica, (C) a polyorganohydridosiloxane, (D) a platinum type catalyst, (E) finely powdered aluminum hydroxide, and (F) a powdered metal compound selected from the group consisting of powdered zinc oxidc, powdered zinc borate, and powdered magnesium hydroxide and a method for manufacturing such a composition.

Abstract: A method of continuous emulsification that can emulsify high-viscosity organopolysiloxane gums and is capable of continuous mass production. A compounding extruder is used whose barrel 1 contains at least 2 mixing element-equipped shafts 3 installed in parallel. On each shaft elevations and depressions are formed along the axial direction and the elevations and depressions on respective shafts intermesh. Organopolysiloxane gum, emulsifying agent, and water are continuously supplied as starting materials to this compounding extruder, and an organopolysiloxane-in-water emulsion is produced by mixing and homogenizing the starting materials by subjecting them through rotation of the mixing element-equipped shafts to a shearing action at a shear rate of at least 10/second (i.e. 10 reciprocal seconds).

Abstract: A method for manufacturing a siloxane compound described by formula R.sup.1.sub.m Si{OSi(CH.sub.3).sub.2 H}.sub.(4-m) comprising reacting a silane compound or condensation product of a silane compound described by formula R.sup.1.sub.m Si(OR.sup.2).sub.(4-m), where R.sup.1 is selected from the group consisting of hydrogen and substituted or unsubstituted monovalent hydrocarbon groups, R.sup.2 is hydrogen, alkyl groups and alkoxyalkyl groups, and m is an integer from 0 to 3, with 1,1,3,3-tetramethyldisiloxane in an aqueous solution of an acid in which the acid concentration is 1.0 wt % or less, and the molar ratio of the aqueous solution to the 1,1,3,3-tetramethyldisiloxane is in the range of 0.5 to 1.5. The method is particularly useful for manufacturing siloxane compounds having dimethylhydrodosiloxy groups.

Abstract: A silatrane derivative having the formula: ##STR1## wherein each R.sup.1 is independently a hydrogen atom or an alkyl group; each R.sup.2 is independently selected from the group consisting of a hydrogen atom, an alkyl group, and an alkoxysilyl-containing organic group having the general formula:--R.sup.4 --Si(OR.sup.5).sub.x R.sup.6.sub.(3-x)wherein R.sup.4 is a divalent organic group, R.sup.5 is a C.sub.1 to C.sub.10 alkyl group, R.sup.6 is a monovalent hydrocarbon group, and x is 1, 2, or 3, with the proviso that at least one R.sup.2 is the alkoxysilyl-containing organic group; and each R.sup.3 is independently selected from the group consisting of a monovalent hydrocarbon group, a C.sub.1 to C.sub.10 alkoxy group, a glycidoxyalkyl group, an oxiranylalkyl group, an acyloxyalkyl group, a haloalkyl group, and an aminoalkyl group.

Abstract: An addition reaction-curing conductive silicone composition comprises: an organopolysiloxane with alkenyl groups, an organopolysiloxane with silicon-bonded hydrogen atoms, a conductive microparticulate, a platinum catalyst, and a volatile solvent; and the composition cures to yield a conductive cured silicone product that has low resistance and resistivity values, a resistance value independent of temperature, and little variation in resistance and resistivity values over time.

Abstract: The object of the present invention is to provide ?a! a cosmetic raw material which allows the uniform dispersion of a powdered silicone rubber in a cosmetic, ?b! a cosmetic ?i! which consists of the abovementioned cosmetic raw material and other cosmetic raw materials, ?ii! which contains a uniformly dispersed powdered silicone rubber, and ?iii! which has a good feeling on the fingers and skin, good spreading characteristics and a good feeling during use, and ?c! a method for manufacturing such a cosmetic with good efficiency.The present invention provides ?a! a cosmetic raw material which is characterized by the fact that said material consists of an aqueous suspension of a powdered silicone rubber with a mean particle size of 0.

Abstract: A silicone gel composition that contains(a) a silicone oil,(b) a polyoxyalkylene group-containing organopolysiloxane with the formula ##STR1## wherein R is the methyl or phenyl group; A is the methyl group, phenyl group, or polyoxyalkylene groups with the formula--C.sub.3 H.sub.6 O(C.sub.2 H.sub.4 O).sub.a (C.sub.3 H.sub.6 O).sub.b R'wherein R' is the hydrogen atom, an acyl group, or alkyl groups having 1 to 4 carbon atoms, a is an integer with a value of 5 to 50, and b is an integer with a value of 5 to 50;m is an integer with a value of 50 to 1,000; andn is an integer with a value of 1 to 40,and (c) water.

Abstract: A novel branched siloxane-silalkylene copolymer containing a plurality of silicon-bonded hydrogen atoms or silicon-bonded alkoxy groups in the molecule. The copolymers are used to improve properties, such as, mechanical strength, adhesiveness, and durability of an end product.

Abstract: The present invention provides a paper feed roll adapted for office machines which exhibits a high friction coefficient suitable for the conveyance of copying paper, printing paper, original, etc. and less abrasion. A process for the preparation of such a paper feed roll is also provided. Further, a silicone rubber composition suitable for the foregoing paper feed roll having an excellent formability to roll is provided. In particular, a novel silicone rubber-coated paper feed roll is provided, which is prepared from a silica-containing silicone rubber composition. The silicone rubber obtained by curing the silica-containing silicone rubber composition and composes the paper feed roll has an impact resilience of not less than 80% after curing as determined by JIS K6301, a permanent compression set of not more than 4% under a condition of 25% compression at 70.degree. C. for 22 hours and a 100% modulus of from 0.3 to 1.0 MPa.

Abstract: A release agent comprising a mixture of (A) a dimethylpolysiloxane and (B) an organopolysiloxane with phenolic hydroxyl groups, said mixture having an average phenol equivalent within the range of 10,000 to 5,000,000 and a dimethylsiloxane oligomer with less than 20 silicon atoms in an amount of less than 5,000 ppm, said agent having a viscosity within the range of 5.times.10.sup.-5 to 1.times.10.sup.-1 m.sup.2 /s at 25.degree. C. The release agent of the present invention possesses excellent heat-resistant and release properties, and suppresses formation of formaldehyde under the effect of thermal decomposition.

Abstract: A silicone rubber electrical wire insulating covering formed by curing a composition comprising (A) 100 parts by weight of a polydiorganosiloxane gum, (B) 10 to 150 parts by weight of finely powdered silica, (C) 0.01 to 20 parts by weight of a zinc compound, and (D) 0.1 to 10 parts by weight of a methyl-group-substituted benzoyl peroxide. When cured the composition has good electrical insulating characteristics and does not adhere to electrical conductors.

Abstract: A method for inhibiting polymerization of acrylic-functional silanes comprising forming a mixture comprising an acrylic-functional silane and a polymerization inhibitor described by formula ##STR1## where n is 0 or 1; M is an atom selected from a group consisting of N, P, As, Sb, O, S, Se, Sn, and I; R is an independently selected monovalent hydrocarbon group or hydrogen atom; m is 1, 2, or 3; and X is a conjugate base of an organic acid or inorganic acid.

Abstract: This invention relates to a silicone release coating composition comprising an organopolysiloxane having at least 2 alkenyl groups in each molecule, an organopolysiloxane having at least 3 silicon-bonded hydrogen atoms in each molecule, a carbon-carbon triple bond-functional alcohol having a boiling point at ambient pressure of at least 140.degree. C., an organosilicon compound having at least 3 carbon-carbon triple bond-functional hydrocarbon groups bonded across oxygen to silicon, and a platinum catalyst. The silicone release coating compositions of this invention have excellent bath stability, form a very stable thin film on applicator rolls, cure rapidly even at relatively low temperatures, have stable curing characteristics during the course of bath aging, and exhibit stable release values during the course of bath aging.

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 method for preparing fatty acid chlorides. The method comprises reacting a silylation product of a fatty acid comprising at 1east 2 aliphatically unsaturated bonds per molecule and a chlorinating agent.

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 liquid silicone rubber composition for a lubricant seal having after it is cured high resistance to lubricant, with high stability displayed even in lubricant that has been subjected to thermal and oxidative degradation, and having its rubber elasticity well maintained. The liquid silicone rubber composition for a lubricant seal comprises the following ingredients: (A) an organopolysiloxane containing 2 or more silicon-atom-bonded alkenyl groups in each molecule; (B) an inorganic filler; (C) an oxide or hydroxide of an alkaline-earth metal with an atomic weight of 40 or greater; (D) an organohydrogensiloxane containing 3 or more silicon-atom-bonded hydrogen atoms in each molecule; and (E) a platinum-type catalyst.

Abstract: A catalyst enables hydrosilylation of aliphatically unsaturated carbon-carbon bonds by silicon-bonded hydrogen to be conducted rapidly in water. The catalyst provides a rapid method of carrying out hydrosilylation in water. An emulsion form of catalyst includes a dispersion in water of liquid catalyst, the main component of which is a platinum and alkenylsiloxane complex. The volumetric average particle size of liquid catalyst dispersed is less than or equal to 1 .mu.m. Hydrosilylation of an aliphatically unsaturated carbon-carbon bond by silicon-bonded hydrogen is carried out in water using the catalyst.

Abstract: A silicone rubber composition that yields silicone rubber whose durometer can be freely reduced without a concomitant reduction in the mechanical properties of the silicone rubber. The reduction in durometer is achieved by controlling the concentration of an organosiloxane having hydrogen substitution on terminal silicon atoms.

Abstract: A semiconductor device in which the surface of the semiconductor element is coated with a cured silicone in which there is dispersed filler having an average particle diameter of 0.01 to 500 micrometers and a specific gravity of 0.01 to 0.95 characterized in that the concentration of said filler is higher in the layer of said cured material remote from the element than in the layer of said cured material adjoining the element. The method for fabricating such a device comprises coating the surface of a semiconductor element with a curable silicone composition in which there is dispersed a filler having an average particle diameter of 0.01 to 500 micrometers and a specific gravity of 0.01 to 0.95 and thereafter curing said composition after the elapse of sufficient time for the filler in the layer of the composition adjoining the element to migrate into the layer of said composition remote from the element.