Abstract: A room-temperature curable polyorganosiloxane composition comprising the following components (A) to (C): (A) 100 parts by weight of (1) a mixture of a terminally reactive polyorganosiloxane represented by the formula R.sup.1.sub.a (R.sub.2 O).sub.3-a SiZ[R.sub.2 SiO].sub.n SiR .sup.1.sub.2 ZSi(OR.sup.2).sub.3-a R.sup.1.sub.a ; (2) a silane represented by the formula R.sup.3.sub.b Si(OR.sup.4).sub.4-b or a partially hydrolyzed condensation product thereof; the amount of (A) (1) being from 85 to 100 parts by weight; (B) from 0.01 to 20 parts by weight of a curing catalyst; and (C) from 0.5 to 20 parts by weight of a polycondensation reaction product of an amino group-containing silane represented by the formula X.sub.c Si(WNH.sub.2)Y.sub.3-c and a silazane represented by the formula X.sub.d Y.sub.3-d SiNHSiY.sub.3-d X.sub.d ; where all symbols are defined in the specification.

Abstract: Disclosed is a curable resin composition comprising (a) 100 parts by weight of a siloxane-amide block copolymer of formula (1): ##STR1## where R.sup.1 is a substituted or unsubstituted divalent hydrocarbon group; R.sup.2 may be the same or different and each is a substituted or unsubstituted monovalent hydrocarbon group; R.sup.3 is substituted or unsubstituted divalent aromatic hydrocarbon group; and m and an each are a number of 1 or more; (b) from 1 to 100 parts by weight of a crosslinking agent containing 2 or more epoxy groups in the molecule, and (c) up to 15 parts by weight of a curable catalyst. The composition can be cured at room temperature and in the absence of moisture in a closed system to give a cured product having high oil resistance and mechanical strength.

Abstract: An air cell comprising a cell container, a gas diffusion electrode which uses oxygen as an active material, and an air-inlet opening for communication with air outside the container. A porous film is provided to support the gas diffusion electrode, and an air-diffusing porous sheet impregnated with film-forming silicone is provided between the porous film and the air-inlet opening.

Abstract: A silicone rubber composition comprising(A) 100 parts by weight of a polyorganosiloxane having, per molecule, at least two structural units represented by the following formula:(R.sup.1).sub.a (R.sup.2).sub.b SiO.sub.(4-(a+b))/2 (I)(B) a polyorganohydrogensiloxane comprising structural units shown by the following formula:(R.sup.3).sub.c H.sub.d SiO(4-(c+d))/2 (II)and having at least three silicon-bonded hydrogen atoms per molecule, the amount of component (B) being such that the number of silicon-bonded hydrogen atoms in component (B) is from 0.5 to 4.0 per R.sup.1 group in the structural units shown by formula (I) of component (A),(C) from 0.1 to 10 parts by weight of a compound selected from the group consisting of an organosilicon compound having, per molecule, at least one silicon-bonded hydrogen atoms and at least one group represented by the following formula: ##STR1## and an acrylic- or methacrylic-functional silane coupling agent, (D) from 0.

Abstract: A process for producing a thermoplastic resin which comprises graft-polymerizing at least one vinyl monomer (IV) onto a modified polyorganosiloxane (III) obtained by condensation of from 90 to 99.8% by weight of an organosiloxane (I) having a structural unit represented by the formula R.sup.1.sub.n SiO.sub.(4-n)/2, wherein R.sup.1 represents a substituted or unsubstituted monovalent hydrocarbon group and n is an integer of from 0 to 3, and from 10 to 0.2% by weight of a graft crosslinking agent (II) having a modified alkoxysilane structure.

Abstract: A polyorganosiloxane series thermoplastic resin comprising a graft copolymer obtained from a vinyl monomer and a modified polyorganosiloxane, and a thermoplastic resin composition containing the same. The resin and the composition thereof have excellent slidability, abrasion resistance, weather resistance, cold resistance and impact resistance, and can be applied to new fields such as sliding parts, parts for cold district, outdoor parts, etc.

Abstract: A thermoplastic resin containing a graft copolymer obtained by graft-copolymerizing at least one vinyl monomer onto colloidal silica-core silicone-shell particles, and a process for producing the thermoplastic resin.A colloidal silica-core silicone-shell particles comprising(A) from 99.9 to 5% by weight of cores which are colloidal silica particles, and(B) from 0.1 to 95% by weight of shells comprising an organosiloxy group represented by the formula ##STR1## wherein R.sup.1 which may be the same or different each represents a substituted or unsubstituted monovalent hydrocarbon group having 1 to 8 carbon atoms, Q represents hydrogen atom or an alkyl group having 1 to 6 carbon atoms, p is an integer of 1 to 3, and q is an integer of 0 to 2, with proviso that (p+q) is an integer of 1 to 3, and/or a polyorganosiloxane represented by the average composition formula ##EQU1## wherein R.sup.

Abstract: A room temperature vulcanizing type electroconductive silicone rubber composition comprising(A) 100 parts by weight of an organopolysiloxane having in one molecule thereof at least two hydroxyl groups and/or alkoxy groups, said hydroxyl groups and alkoxy groups being bonded to silicon atoms;(b) 10 to 850 parts by weight of a powdery or fibrous metallic oxide-type electroconductive material showing a white or a light and bright color;(C) 0.1 to 30 parts by weight of a crosslinking agent;(D) 0 to 5 parts by weight of a crosslinking catalyst; and(E) 1 to 500 parts by weight of a volatile organic solventis disclosed. The composition can cold cure to form a rubber-like elastomer showing a white color or a light and bright color and having a stable semiconducting properties over a long period of time.

Abstract: A silicone resin fine powder containing a quaternary ammonium group-containing organofunctional group and having excellent physiological activity, hydrophilicity and polarity, which comprises units represented by RSiO.sub.3/2 wherein R represents a substituted or unsubstituted monovalent hydrocarbon group, and additionally at least one of units represented by SiO.sub.2 and units represented by RSiO wherein R is the same as defined above.

Abstract: An ultraviolet-curable silicone composition comprising(A) 100 parts by weight of an epoxy-functional polyorganosiloxane which comprises structural units represented by the formula R.sup.1 R.sup.2 SiO, wherein R.sup.1 represents hydrogen atom or a monovalent hydrocarbon group and R.sup.2 represents hydrogen atom, a monovalent hydrocarbon group, or a monovalent epoxy-functional organic group, and in which at least two of all the organic groups are a monovalent epoxy-functional organic group;(B) from 1 to 80 parts by weight of at least one copolymer for regulating peel strength, which is soluble in component (A), selected from the group consisting of (i) a copolymer represented by a unit structure of MQ or M.sup.A Q, (ii) a copolymer represented by a unit structure of M.sup.A T, MT.sup.A or M.sup.A T.sup.A, and (iii) a copolymer represented by a unit structure of M.sup.A DQ, MD.sup.A Q or M.sup.A D.sup.A Q, wherein M represents an R.sup.3.sub.3 SiO.sub.1/2 unit, M.sup.A represents an R.sup.3.sub.2 R.sup.4 SiO.

Abstract: A process for continuously producing a heat-vulcanizable silicone rubber compound, which includes the steps of:(i) mixing (A) a diorganopolysiloxane having a viscosity as measured at 25.degree. C. of 1.times.10.sup.5 cP or more, (B) an inorganic filler and (C) a processing aid, as basic ingredients, by a high-speed mechanical shearing machine, thereby to obtain a flowable particulate mixture in which each ingredient is present in a substantially uniformly and finely dispersed state, and(ii) continuously feeding, at a constant feed rate, said particulate mixture to a continuously kneading and extruding machine through a feed opening thereof, which machine has two screws rotating in the same direction, thereby to obtain a homogeneous silicone rubber compound from a discharge opening of said kneading and extruding machine.

Abstract: A coating composition, a coated inorganic hardened product having a cured layer formed from the coating composition, and a process for producing the coated hardened product.A coating composition comprising the following components (A) to (C);(A) an organosilane oligomer solution containing silica particles dispersed therein, said solution being obtained by partially hydrolyzing a hydrolyzable organosilane represented by the formulaR.sup.1.sub.n SiX.sub.4-n (I)wherein R.sup.1 which may be the same or different each represents a substituted or unsubstituted monovalent hydrocarbon group having 1 to 8 carbon atoms, n is an integer of from 0 to 3, and X represents a hydrolyzable group, in a colloidal silica dispersed in an organic solvent or water,(B) a polyorganosiloxane having a silanol group in the molecule thereof, represented by the average composition formulaR.sup.2.sub.a Si(OH).sub.b O.sub.(4-a-b)/2 (II)wherein R.sup.

Abstract: Colloidal silica-core silicone-shell particles, an emulsion containing, as a solid component, at least 30% by weight of the silica-core silicone-shell particles, and a process for producing the emulsion.A colloidal silica-core silicone-shell particles comprising(A) from 99.9% to 5% by weight of cores which are colloidal silica particles, and(B) from 0.1% to 95% by weight of shells comprising an organosiloxy group represented by the formula ##EQU1## wherein R.sup.1 which may be the same or different each represents a substituted or unsubstituted monovalent hydrocarbon group having 1 to 8 carbon atoms, Q represents hydrogen atom or an alkyl group having 1 to 6 carbon atoms, p is an integer of 1 to 3, and q is an integer of 9 to 2, with proviso that (p+q) is an integer of 1 to 3,or a polyorganosiloxane represented by the average composition formula ##EQU2## wherein R.sup.2 represents a substituted or unsubstituted monovalent hydrocarbon group having 1 to 8 carbon atoms and a is a number of 0.8 to 3.0.

Abstract: A silicone-based composite rubber composition having good processability on rolls which is obtained by compounding a rubber-forming polymer (A) comprising a polyorganosiloxane and an organic rubber, a silicon compound (B) having at least two hydrolyzable groups per molecule which are able to undergo hydrolysis and condensation reactions with silanols, and a heavy metal compound, amine, or quaternary ammonium salt (C) which catalyzes the hydrolysis and condensation reactions, and allowing the resulting formulation to undergo hydrolysis and condensation reactions while the formulation is kept being deformed by shearing; a crosslinkable, silicone-based composite rubber composition comprising the silicone-based composite rubber composition having blended therewith an organic rubber-crosslinking agent; and an oil seal and a rubber hose both obtained from the crosslinkable, silicone-based composite rubber composition.

Abstract: A method for hydrolyzing an organochlorosilane to produce an organopolysiloxane, which comprisesa first-stage hydrolysis of hydrolyzing the organochlorosilane using a substantially stoichiometrically equivalent amount of water, thereby producing a hydrolyzate, anda second-stage hydrolysis of hydrolyzing the hydrolyzate obtained in the first-state hydrolysis using a stoichiometrically excess amount of aqueous hydrogen chloride solution having a predetermined hydrogen chloride concentration, thereby to produce an organopolysiloxane as a hydrolyzate and, at the same time, regulate the viscosity of the organopolysiloxane.

Abstract: Disclosed is an electroconductive silicone composition, which contains an acetylene black having an HCl-absorption of 12 ml/5 g or less and an I-adsorption of 50 mg/g or less and which has improved workability. The composition may further contain a magnesium carbonate, a silicone oil and/or a carbon black having a mean grain size of 200 m.mu. or more and a specific surface area of 15 m.sup.2 /g or less. The it composition has improved reproducibility and temperature-dependent stability with respect to the electroconductivity as well as improved fire-resistance.Also disclosed is a silicone ink comprising (A) an addition-curable polyorganosiloxane, (B) a carbon black having an I-adsorption of 50 mg/g or less, a mean grain size of 35 m.mu. or more and a DBP adsorption of 150 ml/100 g or more, and (C) a solvent. The ink has improved storage stability.

Abstract: Disclosed is a curable silicone composition comprising: (A) an organopolysiloxane having a silicon-bonded unsaturated aliphatic radical; (B) an organopolysiloxane having a silicon-bonded mercaptoalkyl radical; and (C) a photoreaction-initiating amount of photoreaction initiator. The photoreaction initiator includes arylcarbonyl phosphine oxide compounds, having a radical selected from the group consisting of substituted and unsubstituted aryl radicals, and another two radicals selected from the group consisting of substituted and unsubstituted monovalent hydrocarbon radicals. The above silicone, composition is efficiently cured by visible light radiation and usable for photo-curable adhesives.

Abstract: A polyorganosiloxane series thermoplastic resin comprising a graft copolymer obtained from a vinyl monomer and a modified polyorganosiloxane, and a thermoplastic resin composition containing the same. The resin and the composition thereof have excellent slidability, abrasion resistance, weather resistance, cold resistance and impact resistance, and can be applied to new fields such as sliding parts, parts for cold district, outdoor parts, etc.

Abstract: Disclosed is an electroconductive silicone rubber composition containing, as a carbon black, a furnace black having an iodine adsorption amount of 50 mg/g or less and a DBP oil absorption amount of 200 ml/100 g or more. The composition has an improved and suitable crosslinking rate. The composition provides a cured product having a good crosslinking density and a sufficient electroconductive capacity.

Abstract: A room temperature-curable polyorganosiloxane composition which can provide a cured elastic product having a smooth surface, comprising (A) a hydroxyl-terminated polyorganosiloxane, (B) a silane having at least two silicon-bonded ketoximato groups per molecule and/or a partial hydrolysis condensate of the silane, (C) a curing catalyst, and (D) an organozirconium compound.