Abstract: A process for the preparation of (D) thiocyanato-bearing organoalkoxysilanes represented by the general formula (3) NCS—R1—Si(OR2)nR33-n wherein R1 is a divalent hydrocarbon group having 1 to 6 carbon atoms, R2 and R3 are monovalent hydrocarbon groups, and the subscript n has a value of from 0 to 3, in which (A) a thiocyanic acid salt represented by the general formula (1) MSCN, wherein M is an alkali metal and (B) a halogenated alkylalkoxysilane represented by the general formula (2) XR1Si(OR2)nR33-n wherein X is a halogen atom, and R1, R2, R3, and the subscript n are the same as above, are reacted in the presence of (C) a phase transfer catalyst.

Abstract: A vibration damping silicone composition that exhibits an excellent vibration damping performance and long-term storage stability comprising a silicone oil, a silicone resin powder that is solid at room temperature, and a surface-hydrophobic silica powder having a pH of greater than 6 but less than 9. The composition is particularly useful in shock absorbers for electronic and/or electrical equipment such as compact disk players, compact disk changers, mini-disk players, and car navigation devices.

Abstract: Magnetic separators are used for treating silicon-containing materials from chlorosilane reactors to remove magnetically influenced components in the silicon-containing materials. The removal of such impurities allows for enhanced reactivity of the silicon-containing materials in processes wherein the silicon-containing materials are raw materials for the production of silicon based compounds, such as, for example, basic alkylhalosilanes such as dimethyldichlorosilane, methyldichlorosilane, and other chlorosilanes such as trichlorosilane, which chlorosilanes are useful in the preparation of valuable silicon-containing products.

Abstract: The present invention relates to novel alkylamino-substituted organosilicon compounds and a method for their preparation. The described process involves a dehydrohalogenation reaction between a triorganosilylalkyl halide and an aminophenol in the presence of a hydrogen halide acceptor.

Abstract: A polish including a film forming wax material and an organopolysiloxane elastomer. The elastomer is in the form of particles mixed with the film forming wax. The particles are spherical and have an average diameter of from about 0.3 um to about 30 um. The polish contains at least one additive selected from the group consisting of organic solvents, silicone oils, and surfactants. The film forming wax material may be one of carnauba wax, montan wax, candelilla wax, ceresin wax, paraffin waxes, and beeswax.

Abstract: Hot-bonding silicone adhesive composition prepared by kneading and heating a mixture of a polydiorganosiloxane and a microparticulate silica and then adding an arbitrary amount of a solvent and an organopolysiloxane resin to the kneaded and heated mixture. The composition has substantially no tack at room temperature when freed of its solvent; however, it has high adhesive strength at elevated temperature.

Abstract: A polish including a film forming wax material and a silicone rubber. The rubber is in the form of particles mixed with the film forming wax, and the silicone rubber particles contain a silicone oil. The particles have an average diameter of from about 0.3 .mu.m to about 30 .mu.m. The polish includes at least one additive selected from the group consisting of organic solvents, a second silicone oil, and surfactants. The film forming wax material is one of carnauba wax, montan wax, candelilla wax, ceresin wax, paraffin waxes, or beeswax. The silicone rubber forming the particles is one of addition reaction curable silicone rubber compositions, condensation reaction curable silicone rubber compositions, organic peroxide curable organopolysiloxane compositions, or high energy curable silicone rubber compositions.

Abstract: The combination of a microencapsulated hydrosilylation catalyst selected from the group consisting of metals from the platinum group of the periodic table and compounds of these metals and a known inhibitor for this type of catalyst impart excellent storage stability to organosiloxane compositions that cure by a hydrosilation reaction while enabling these compositions to rapidly cure at temperatures above the softening temperature of the thermoplastic resin used to encapsulate the hydrosilylation catalyst. The curing rate of the composition is faster relative to compositions containing the microencapsulated catalyst without the catalyst inhibitor.

Abstract: This invention provides particulate catalyst compositions comprising a platinum-containing hydrosilation reaction catalyst and a polydiorganosilane exhibiting a softening point of from 50.degree. to 200.degree. C. The average particle size of the particulate does not exceed 100 micrometers, and the surface layer of the particulate is substantially free of said catalyst. Curable organopolysiloxane compositions containing the present catalyst compositions exhibit excellent storage stability.

Abstract: A semiconductor device (1) in which a heat-bondable cured silicone (7) is applied and heat-bonded to the surface of only a predetermined principal portion of the semiconductor device so as not to contact bonding wires (3), flip chip solder portions (8) or beam leads, in order to protect the surface of the principal portion, and a seal layer (6) or (10) is provided after the heat bonding of the cured silicone. The cured silicone (7) is preferably in the form of a film, and a heat-resistant base material (12) may be laminated to one side of the cured silicone. Breaking of bonding wires (3), cracking of solder portions (8) and separation of beam leads do not occur because only the portion to be protected can be protected by coating with the cured silicone (7) and the portion not to be protected is not so coated. Moreover, sisnce there is no contamination caused by a silicone exhalation, the occurrence of a defective bonding and the separation of a sealing resin can be prevented.

Abstract: An improved self-bonding curable organopolysiloxane composition which contains (A) an organopolysiloxane having at least 2 silicon-bonded alkenyl groups in each molecule, (B) an organopolysiloxane having at least 2 silicone-bonded hydrogen atoms in each molecule, (C) a catalytic quantity of a platinum-type catalyst, (D) a carbonyl complex of a Group VIB element, and (E) a compound containing a silicon-bonded alkoxy group which is selected from the group consisting of silanes or siloxane oligomers. Examples of the carbonyl complex are molybdenum hexacarbonyl, tungsten hexacarbonyl, and chromium hexacarbonyl.

Abstract: An acrylic rubber composition containing an amino group-containing silicon compound is characterized by excellent roll workability and a rapid vulcanization rate and characteristically does not require secondary vulcanization.

Abstract: What is disclosed and claimed are organopolysiloxanes having liquid crystalline properties at relatively low temperatures as compared to prior art materials. The organopolysiloxanes have this property by virtue of a unique chemical spacer between the siloxane and the mesogenic groups, which spacers are oxyalkylene groups.

Abstract: The method of the present invention provides for the manufacturing of an alkenyl group-containing organopolysiloxane using an alkali catalyst in the presence of oxygen and in the absence of carbon dioxide. The copolymer is characterized by a viscosity of at least 500 cst at 25.degree. C., can be efficiently manufactured and is free of gelation. In the method an organopolysiloxane represented by the average formula R.sup.1.sub.a SiO.sub.(4-a)/2 in which R.sup.1 is a monovalent hydrocarbon group free of aliphatic unsaturation and a 4-8 carbon atom alkenyl group-containing organopolysiloxane represented by the average formula R.sup.2.sub.b R.sup.3.sub.c SiO.sub.(4-b-c)/2 are copolymerized.

Abstract: The reaction product of a cerium compound with an alkali metal silanolate in combination with a platinum compound and a titanium compound when added to a peroxide-curable silicone rubber composition yields a transparent, heat stable and flame resistant cured silicone rubber.

Abstract: Cured silicone rubber powder containing large amounts of particulate material formed by dispersing a liquid silicone rubber composition curable by a platinum-catalyzed hydrosilation reaction into water. The presence of a low molecular weight, volatile polydiorganosiloxane makes it possible to incorporate at least 100 parts by weight of particulate material per 100 parts of curable polydiorganosiloxane into the composition. The volatile polydiorganosiloxane is removed from the cured polwder. Finely divided magnetic metals, electrically conductive materials and reinforcing silica powders can be incorporated using the present method.

Abstract: A method for preparation of polycyclic 1,3-thiazolidines is described. The method comprises reacting a fluoride ion source, in a solvent, with an onium salt synthesized by the reaction of a nitrogenous heteroaromatic compound with a halomethyl trimethylsilylmethyl sulfide, the halomethyl trimethylsilylmethyl sulfide being selected from the group consisting of chloromethyl trimethylsilylmethyl sulfide, bromomethyl trimethylsilylmethyl sulfide, or iodomethyl trimethylsilylmethyl sulfide.

Abstract: Alkali-soluble organopolysiloxanes useful in the alkali-developing resist materials for use in microprocesses in LSI device fabrication have the following general formula ##STR1## where A is a hydroxyphenyl group; R is an alkylene group having 1 to 4 carbon atoms; n is zero or one; R.sup.1 is an alkyl group having 1 to 4 carbon atoms; x and z are positive numbers; y is zero or a positive number; x, y, and z have values such that their ratios are 0.3.ltoreq.(x+y)/z.ltoreq.4; and zero.ltoreq.y/x.ltoreq.5.

Abstract: A microemulsion with an average particle size not exceeding 0.15 micrometers or organopolysiloxane composed of trifunctional siloxane units with the formula RSiO.sub.3/2 and difunctional siloxane units with the formula R.sup.1.sub.2 SiO is characterized by transparency, by excellent mechanical, dilution, and blending stabilities and by an excellent stability against pH variations. The microemulsion is prepared by process comprising the slow addition, to an aqueous emulsion-polymerization catalyst solution, of a crude emulsion prepared from an organotrialkoxysilane having the formula RSi(OR.sup.1).sub.3, a cyclic organopolysiloxane having the formula (R.sup.1.sub.2 SiO).sub.n, a surfactant, and water. A microemulsion which consists of 30 to 95 mol % trifunctional siloxane units and 70 to 5 mol % difunctional siloxane units is useful as a fiber-treatment agent that can impart slip resistance to fibrous material without stiffening the hand, while at the same time not causing oil spots.

Abstract: In the joining of silicone-coated fabrics in the present invention, a silicone rubber adhesive, which is plastic at room temperature and is an addition-curing type containing platinum-type catalyst or a radical-curing type containing organoperoxide, is inserted into the overlap region of said silicone rubber-coated fabrics. This overlap region is then hot-cured after press-adhering or is hot-cured while press-adhering. As a consequence, the silicone-coated fabrics are tightly bonded in an accurate, watertight and airtight manner.