Abstract: Organosilsesquioxanes having at least one mesogenic side group and processes for their preparation, which comprise reacting organosilsesquioxanes having at least one Si-bonded hydrogen atom with chiral or achiral mesogenic compounds containing an aliphatic multiple bond.

Abstract: A synthesis process for polysilsesquioxanes which produces a high yield, tractable copolymer of perfectly alternating silsesquioxane and bridging group segments is provided. A difunctional silsesquioxane monomer of the formula Si.sub.8 R.sub.8 O.sub.11 (OA).sub.2 or Si.sub.7 R.sub.7 O.sub.9 (OSiR.sup.4 R.sup.5 R.sup.6)(OA).sub.2 is reacted with a difunctional compound of the formula X--M--X which forms a bridging group for a time sufficient to condense the difunctional silsesquioxane monomers and bridging groups into a linear polymer containing alternating silsesquioxane and bridging group segments. The resulting linear copolymer is essentially free of impurities and has controllable properties through the proper selection of the monomeric starting materials.

Abstract: Organo(poly)siloxanes composed of units of the formula [R.sub.a R.sup.1.sub.3-a SiO.sub.1/2 ], [R.sub.b R.sup.1.sub.2-b SiO.sub.2/2 ] and [R.sup.1 SiO.sub.3/2 ], in which R can be the same or different and represents a monovalent organic radical which is free from aliphatic carbon-carbon multiple bonding, R.sup.1 can be the same or different and represents a monovalent organic radical which has at least one aliphatic carbon-carbon multiple bond, a is 0, 1 or 2 and b is 0 or 1.

Abstract: An MQ organopolysiloxane compatible with organic plastics, has an epoxy-containing organic group, and has the following general formula ##STR1## R.sup.1 represents monovalent hydrocarbon groups, R.sup.2 represents the hydrogen atom and monovalent hydrocarbon groups, R.sup.3 represents epoxy-containing organic groups and alkoxysilylalkyl groups, a is 0 or a positive number, b and c are positive numbers, a/c has a value of 0 to 4, b/c has a value of 0.05 to 4, and (a+b)/c has a value of 0.2 to 4. Also, a method for the preparation of this organopolysiloxane comprises an addition reaction of an Si-H containing organopolysiloxane with an epoxy-containing compound in the presence of a hydrosilylation catalyst.

Abstract: There is disclosed a method for making organo-silicon polymers from alkyldisiloxanes and alkylsilicates wherein the alkyl groups of the disiloxanes have two or more carbons. Gelling of the organo-silicon polymers is avoided by; first mixing the disiloxane with the alkylsilicate and adding thereto a strong protic acid; and, after reaction has occurred in the aforementioned mixture, adding thereto, in a drop-wise manner, a solution of hydrochloric acid.

Abstract: This invention relates to an organopentasiloxane with the following formula ##STR1## wherein A is the hydrogen atom or an aliphatically unsaturated monovalent hydrocarbon group, R is the same or different monovalent hydrocarbon group, and n is an integer with a value of 2 to 4, which carries silicon-bonded hydrogen or a silicon-bonded, aliphatically unsaturated monovalent hydrocarbon group at one molecular chain terminal and silicon-bonded organoxy group(s) at the other terminal.

Abstract: Novel organosilicon compounds containing alkenyl groups and comprising units of the average formula ##STR1## in which R and R.sup.1 are hydrocarbon containing groups, and A is a radical of the formula ##STR2## in which R.sup.2, R.sup.3 and R.sup.4 are hydrocarbon containing groups; x is 0 or 1; y is 0 or 1, with the proviso that the sum x+y is 1 or 2; a is 0 or 1, with an average of 0.003 to 1.0; b is 0, 1, 2 or 3, with an average of 0.0 to 3.0; c is 0, 1, 2 or 3; with an average of 0.0 to 3.0; and the sum a+b+c.ltoreq.4, with an average of 1.5 to 4.0, with the proviso that each molecule contains at least one A radical and a method for preparation of the novel compounds are disclosed.

Abstract: Liquid organosiloxane MTQ resins of the general formula [M.sub.x T.sub.y Q.sub.z ].sub.n wherein M denotes a monofunctional, T a trifunctional and Q denotes a tetrafunctional siloxane unit is characterized by the fact that n has an average value of from 4 to 14, x+y is not less than z and not more than 2 z and x/y has a value of from 2/1 to 9/1. The resin molecule has at least one reactive substituent as defined and can be made by a method comprising (I) adding together a tetraalkoxysiloxane, a monoorganosilane and a triorganosilane or hexaorganodisiloxane in an acidified aqueous medium provided the tetraalkoxysilane is not added to the aqueous medium prior to the other components, (II) allowing the components to react together in said aqueous medium and, optionally (III) further reacting the finished resin with another compound having N atoms.

Abstract: Organo(poly)siloxanes having Si-linked, conjugated dienyl groups are prepared by adding a secondary or tertiary acetylenic alcohol (1) to an organo(poly)siloxane (2) having at least one Si-linked hydrogen atom in the presence of a catalyst (3) which promotes the addition of Si-linked hydrogen to an aliphatic multiple bond, and then eliminating water by an intramolecular reaction in the presence of an acid catalyst (4) from the alkenol groups of the organo(poly)siloxane thus obtained.

Abstract: Polyorganosiloxane which are useful as resist materials for use in microprocesses such as large scale integration device fabrication are those of the formula ##STR1## where R.sup.1 is a monovalent hydrocarbon group having 1 to 6 carbon atoms; R.sup.2 is a hydrogen atom or a monovalent hydrocarbon group having 1 to 6 carbon atoms; x and z are positive numbers; y is zero or a positive number; and 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.100. The polyorganosiloxanes can be prepared by cohydrolysis or condensation reactions of hydrolyzable group-containing organosilanes or disiloxanes with tetrafunctional hydrolyzable silanes.

Abstract: A bisindenyl derivate of the formula I ##STR1## (M.sup.1 =Si or Ge, R.sup.6 and R.sup.7 =unsubstituted or substituted idenyl radical)is obtained in very good yield by reacting a compound of the formula II ##STR2## (X=halogen) with a compound of the formula III or IVR.sup.6 -M.sup.2 (III) R.sup.7 -M.sup.2 (IV)(M.sup.2 =alkali metal)if, in the reaction, compound III or IV is added slowly to compound II.Compound I is suitable as a starting material for the preparation of metallocene catalyst components.

Abstract: A nonaqueous method is provided for making silicone oligomers by using stoichiometric amounts of formic acid to effect the condensation of polyalkoxysilanes or polayminosilanes. Reaction can be effected under ambient conditions.

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: Polysiloxanes of the general formula ##STR1## wherein R.sup.1 is the same or different and represents alkyl or phenyl,R.sup.2 is the same as R.sup.1 or represents the C.sub.n F.sub.2n+1 (CH.sub.2).sub.2 O--, in which n is a whole number from 4 to 16, with the proviso that no more than 90% of R.sup.2 has the meaning of R.sup.1,andx=5 to 100 andy=0 to 10.The polysiloxanes are effective defoamers of preparations containing organic solvents or of crude oil and may be synthesized from preferably equilibrated hydrogensiloxanes by reaction with C.sub.n F.sub.2n+1 (CH.sub.2).sub.2 OH.

Abstract: An efficient method is proposed for the preparation of an organosiloxane oligomer represented by the general formula YSi(R.sup.1).sub.n (--O--SiR.sub.3).sub.3-n, in which each of the groups denoted by R and R.sup.1 is a halogen-substituted or unsubstituted monovalent hydrocarbon group having 1 to 8 carbon atoms, Y is a hydrogen atom or a monovalent group selected from methyl, phenyl, vinyl, chloromethyl and 3-(meth)acryloxypropyl groups and n is zero, 1 or 2, by the reaction of an organosilicon halomagnesium salt of the formula R.sub.3 Si--O--MgX, in which X is a halogen atom, and an organosilane compound of the general formula YSi(R.sup.1).sub.n (Z).sub.3-n, in which Z is a halogen atom or a lower alkoxy group. In particular, tetrasiloxane compounds represented by the general formula Y.sup.1 Si[--O--Si(CH.sub.3).sub.2 (CH.sub.2 CH.sub.2 CF.sub.3)].sub.3, in which Y.sup.1 is a hydrogen atom, chloromethyl group or 3-methacryloxypropyl group, are each a novel compound not known in the prior art.

Abstract: The method of dripping an alkyl silicate into a mixture of an aqueous hydrochloric acid which contains at least 5 weight percent hydrogen chloride and a trialkylsilane or a disiloxane at a temperature of from 0.degree. to 90.degree. C. is a highly reproducible method for producing a three-dimensional structure of monofunctional siloxane units and tetrafunctional siloxane units. The organosilicon polymers produced are useful as tack agents, coating agents, and as additives in other compositions.

Abstract: Silahydrocarbons such as tetraorganosilanes prepared from halo-substituted silanes and an organomagnesium compound in the presence of a catalytically effective amount of a thiocyanate.

Abstract: Silahydrocarbons such as tetraorganosilanes prepared from halo-substituted silanes and an organomagnesium compound in the presence of a catalytically effective amount of a cyanide.

Abstract: Multifunctional organopolysiloxane resin systems are provided whose starting materials comprise a reactive vinyl containing silane, a disubstituted silane and a trisubstituted silane hydrolyzed together to form a resin system. The preferred material of the resin system has a viscosity of from 7 to 70 centistokes at 25.degree. C. The preferred material is in the form of a contact lens and also contains an ester and a hydrophilic agent.

Abstract: Polyorganosiloxane traction fluids which contain significant amounts of mono-organosiloxane units are described. Specifically, the disclosed polyorganosiloxane traction fluids contain 7 to 45 weight percent siloxane units of formula [RSiO.sub.3/2 ], 40 to 90 weight percent of siloxane units of formula [R.sub.2 SiO], and 0 to 20 weight percent of siloxane units of formula [(CH.sub.3).sub.3 SiO.sub.1/2 ] where the molar ratio of [R.sub.3 SiO.sub.1/2 ] units to [RSiO.sub.3/2 ] units is less than 1 and where R is either cyclohexyl radicals, phenyl radicals, and/or methyl radicals. The polyorganosiloxane traction fluids of this invention are particularly well suited for use in traction drive systems and transmissions subject to wide operating temperature conditions.

Abstract: A method for producing solventless liquid organopolysiloxanes is disclosed. The method involves hydrolyzing an organo silicon composition comprising at least one compound having the general formulaY.sub.(4-n) Si(OR).sub.nwhere Y is phenyl or a primary or secondary alkyl group having from one to four carbon atoms, R is an alkyl group having from one to three carbon atoms, and n is an integer from one to four, and wherein the ratio of OR groups to silicon atoms in the composition is from 2.3:1 to 3.1:1. The products of hydrolysis are then heated to cause substantial siloxane formation by condensation and to distill water and alcohol by-products. Heating is continued until the water content of the resulting siloxane composition is less than 1 percent. The purity of the organo silicon composition, the amount of water used for hydrolysis, the amount of acid present during hydrolysis, and the heating of the organopolysiloxane are so controlled that the solventless organopolysiloxane has a viscosity at 25.degree. C.

Abstract: A very simple and versatile method is proposed for the preparation of an aqueous emulsion of silicone in which an organochlorosilane or a mixture of organochlorosilanes is added dropwise into an aqueous medium in the presence of a surface active agent or, preferably, into an aqueous medium containing a surface active agent in advance followed by or with concurrent removal of the hydrogen chloride from the mixture by adding an alkaline neutralizing agent or by use of the techniques of ion exchange so that a stable aqueous emulsion can be produced in the aqueous medium at the same time as the organochlorosilane or silanes are hydrolyzed followed by the dehydration condensation of the resultant silanol compounds to form an organopolysiloxane in situ by the catalytic activity of the hydrogen chloride formed by the hydrolysis.

Abstract: Ungelled reaction products of a condensation product with an amino silane are formed. The products are capable of curing at a low temperature to form durable coatings. Polyols can optionally be blended with the ungelled reaction products to provide useful coating compositions.

Abstract: Hydraulic fluid compositions are disclosed which have a high boiling point, a high compatibility with standard brake fluid and a high solubility of water. The disclosed hydraulic fluid compositions comprise from 1 to 100 percent by weight of selected siloxane-oxyalkylene copolymers and are suitable for use, for example, as automobile brake fluids.

Abstract: A process is described by which numerous waste or by-product chlorosilane streams can be treated to obtain a granular gel that is easily handleable in further processing steps, shipment, or disposal operations. By hydrolyzing a combined stream with an average SiCl functionality greater than or equal to 2.8 in an aqueous medium at elevated temperature a granular gel is obtained in all cases. The combined stream can be formed by blending several different streams to obtain the desired average SiCl functionality. If the aqueous medium is concentrated hydrogen chloride, the hydrogen chloride generated in the hydrolysis step can be recovered.

Abstract: Alkoxysilanes are hydrolyzed with water in the presence of various hydrolysis catalysts. The hydrolysis catalysts include the solid oxides of the Group IIa metals and solid acid catalysts. The solid acid catalysts are used in conjunction with neutralizing agents and optionally with condensation catalysts.Generally, the process for hydrolyzing alkoxysilanes comprises: mixing an alkoxysilane, a stoichiometric excess of water and an effective catalytic amount of hydrolysis catalyst selected from the group consisting of a solid oxide of a Group IIa metal, a solid acid catalyst and mixtures thereof; neutralizing the hydrolysis mixture with a sufficient amount of neutralizing agent, for example, magnesium oxide; and separating the hydrolysis product from the mixture. When a Group IIa metal oxide hydrolysis catalyst is used, the liquid portion of the hydrolysate is neutral, and no additional neutralizing agent is required in the mixture.

Abstract: The present invention relates to a variety of silicone diffusion pump fluids which are inexpensive to produce. An example of a preferred diffusion pump fluid of the present case is one of the formula, ##STR1## where .phi. is phenyl and such that the fluid boils at 245.degree. C. at 1.5 mm. of Hg pressure. The present invention also has within its scope a process for producing such silicone diffusion pump fluids by hydrolyzing the appropriate chlorosilanes by a reverse hydrolysis procedure, that is, adding the appropriate amount of water to the mixture of chlorosilanes.

Abstract: Novel diaralkyldichlorosilanes expressed by the general formula (I) ##STR1## (wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 each represent hydrogen atom or an alkyl group having 1.about.4 carbon atoms, but a case where R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are all hydrogen atom is excluded),and a process for producing the same are provided.They are useful as monomers for producing polysiloxanes and as intermediates for synthesizing novel organosilicon compounds.

Abstract: A method for imparting a hydrophobic property to a fine oxide powder by treating it with an organo-polysiloxane in the presence of an alkali catalyst. The method is carried out with at least 1.5% by weight of organo-polysiloxane of molecular weight not exceeding 10,000, at least 0.5% by weight of ammonia or an aliphatic amine of a boiling point lower than 100.degree. C. and at least 1.5% by weight of water are added to a dry weight of the fine oxide powder (a quantity obtained after removal of adsorption water content under reduced pressure not exceeding 5 mmHg in mercury meter at 100.degree. to 110.degree. C.). Of these additives, the ammonia or the aliphatic amine of a boiling point not exceeding 100.degree. C. is added at a temperature not exceeding 60.degree. C. Then, after an aging process for at least 15 minutes, heating is carried out to a temperature between 60.degree. and 150.degree.0 C. for a period of at least 30 minutes. All processes are carried out under normal pressure.

Abstract: A process for making cold-setting, non-shrinkable polyurethane foam resins using a mixture of silicon compounds of the formula:A.sub.x B.sub.x+2whereinx=2-25, preferably 2-5A is the group R' Si O.sub.3/2B is the group (R).sub.3 Si O.sub.1/2R represents an alkyl group having from 1 to 3 carbon atomsR' represents an aryl group having from 6 to 14 carbon atoms, with the proviso that the mixture contains at least one compound wherein x is greater than 3.