Abstract: A novel method is provided for preparing carboxy functional silicones, comprising the steps of:(1) addition reacting a mixture of ingredients containing(A) an olefin-terminated organoacyloxysilane;(B) an organohydrogenpolysiloxane, and(C) a precious metal or a precious metal-containing catalyst, and(2) hydrolyzing the addition reaction product prepared in step (1).

Abstract: Certain polysiloxane surface active agents containing radial organic polyether groups provide for improved stability of silicone emulsions, particularly antiperspirant stick compositions.

Abstract: Organosilicon compounds having at least one unit of the general formula ##STR1## in which R represents alkyl, R' is a divalent alkylene, oxyalkylene, alkenylene or oxyalkenylene, Z represents an alkyl, alkoxy or hydroxyl group, a has a value of 0, 1, 2 or 3 and c is 0 to 1, wherein at least one of Z and R' is linked to the multivalent aryl group via an ether linkage, are useful for absorbing UV radiation. Especially if polymeric (with e.g. diorganosiloxane units) they can be incorporated in sunscreen preparations to improve their substantivity to the skin. A process for preparing the compounds is also disclosed.

Abstract: A method is provided for making carboxy aryl terminated organosiloxanes, such as 1,1,3,3-tetramethyl-1-3-disiloxane diyl) bis(benzoic acid) by heating a mixture of an aqueous organic solvent and the corresponding haloacyl aryl terminated organosiloxane. The carboxy aryl terminated organolsiloxanes of the present invention can be used to make silicone polyester block copolymers and silicone polycarbonate block copolymers where the silicone block is joined to the organic block by an ester linkage.

Abstract: The present invention relates to polysiloxanes containing pendant sterically hindered phenol moieties. The compounds are represented by the general formula MD.sub.X D'.sub.y M.

Abstract: Non-crosslinked, branched liquid crystalline organosilicon compounds exhibit the general formula(R.sub.3 SiO.sub.1/2).sub.w (R.sub.2 SiO).sub.x (RSiO.sub.3/2).sub.y (SiO.sub.4/2).sub.zwhere at least one R represents a mesogenic (liquid crystal forming) group, the remaning R represent monovalent hydrocarbon or halohydrocarbon radicals, w represents an integer having a value of at least 1, x, y, and z individually represent an integer including zero, the sum of x and y is at least 1 and the sum of w, x, y, and z is from 4 to 50, inclusive.

Abstract: A process for preparing organofunctional organopolysiloxanes which comprises reacting a cyclic diorganopolysiloxane with a silane having a SiC-bonded monovalent organic radical with at least one functional group and at least one SiOC-bonded monovalent hydrocarbon radical which can be substituted by an ether oxygen atom, or with an oligomer of such a silane having a maximum of 10 silicon atoms per molecule, in the presence of a quaternary ammonium hydroxide.

Abstract: Novel organosiloxanes containing units of the formula ##STR1## in which Q represents a divalent group composed of carbon and hydrogen, and optionally oxygen or sulphur, and R represents a monovalent hydrocarbon group, the organosiloxanes also containing at least two silicon-bonded substituents selected from hydrogen atoms, alkoxy groups and alkoxyalkoxy groups. The organosiloxanes can be applied to textile fibres, optionally in conjunction with crosslinking agents and catalysts, to impart thereto resistance to soiling by oily substances.

Abstract: Organopolysiloxanes having the formulasA.sub.x R.sub.3-x SiO(SiR.sub.2-x A.sub.x O).sub.n SiR.sub.3-x A.sub.xor(SiR.sub.2-x A.sub.x O).sub.y,where R is a monovalent hydrocarbon radical or a halogenated monovalent hydrocarbon radical or a monovalent aliphatic radical consisting of carbon, hydrogen, ether oxygen and fluorine atoms; A is a SiC-bonded organic radical containing a carboxyl group and a carbonyl group to which is bonded an organic radical having at least one terminal carbon-carbon double bond; n is an integer having a value of at least 1; x is 0 or 1; and y is an integer having a value of from 3 to 10, in which the organopolysiloxanes contain at least one radical represented by A per molecule.

Abstract: Carboxyalkyl-substituted organopolysiloxanes are prepared by hydrolysis of a silalactone composition having the formula ##STR1## where n has an average value greater than zero, R and Q are hydrocarbon and X is Cl or Br. Silicon-containing compounds having the formula R.sub.a Z.sub.b SiO.sub.(4-a-b)/2, where Z is a hydrolyzable radical, can be cohydrolyzed therewith. The silalactone composition is prepared by gently heating a mixture of an ester having the formula X.sub.2 R SiQCO.sub.2 R' and a catalyst, such as N,N-dimethylbenzylamine.

Abstract: A method is provided for making silylaroylhalides such as chlorodimethylsilylbenzoyl chloride. Reaction is effected between substantially equivalent amounts of a polyhaloacyl aromatic compound, for example, terephthaloyl chloride and a polyhalopolysilane such as dichlorodisilane in the presence of a palladium catalyst.

Abstract: Novel organosiloxanes containing units of the formula ##STR1## in which Q represents a divalent group composed of carbon and hydrogen, and optionally oxygen or sulphur, and R represents a monovalent hydrocarbon group, the organosiloxanes also containing at least two silicon-bonded substituents selected from hydrogen atoms, alkoxy groups and alkoxyalkoxy groups. The organosiloxanes can be applied to textile fibres, optionally in conjunction with crosslinking agents and catalysts, to impart thereto resistance to soiling by oily substances.

Abstract: Carboxyfunctional silicone glycols are made by equilibration at elevated temperatures of silicone glycols in which the glycol radical or radicals are bonded to silicon with an Si--C linkage and carboxyfunctional siloxanes in which the carboxy radical or radicals are bonded to silicon with an Si--C linkage in the presence of an acid catalyst which is capable of breaking Si--O linkages but not Si--C linkages. The carboxyfunctional silicone glycols so produced are of the type which are useful as profoamers, surfactants, spreading agents for active chemicals, such as pesticides, hydrophilizing treatments for fabrics and hair, as emollients in cosmetic formulations and as chelates.

Abstract: What is disclosed is a composition of matter useful in expediting the coagulation of whole blood. The coagulation promoter is a polysiloxane which contains at least one hydroxy functional or carboxylic functional monovalent hydrocarbon radical bonded to a silicon atom.

Abstract: Optical contact lenses and silicone hydride polymers therefor are disclosed.

Abstract: Stabilizers for inorganic silicate corrosion inhibitor additives in antifreeze/coolant formulations are described. The stabilizers have the structure ##STR1## where n is an integer from 1 to 20 and R is a solubilizing agent. The solubilizing group may be a cyano-terminated group, a diol ether group, an acid group, an amide group, a group which will yield a diol on hydrolysis, among others. These stabilizers help prevent the inorganic silicate additives from precipitating out and thus extend the shelf life of antifreeze formulations into which they are incorporated.

Abstract: The invention provides a novel diorganopolysiloxane compound composed of dimethysiloxane units, methyl (2-perfluoroalkylethyl)siloxane units and methyl acyloxyalkylsiloxane units. The novel diorganopolysiloxane compounds of the invention have excellent lubricating properties so that they are useful as an additive ingredient in various materials such as coating compositions, magnetic layer of recording tapes and the like where lubricity or mold releasability is essential.

Abstract: Organopolysiloxane lubricant compositions comprising a polysiloxane chain containing silicon-bonded hydrocarbon radicals and silicon-bonded ester radicals. The ester functional organopolysiloxanes are obtained by reacting an allyl ester, by Si-olefin addition, with an organohydrogenpolysiloxane in the presence of a platinum catalyst.

Abstract: Compositions having liquid crystal phases which contain at least one component consisting of an organopolysiloxane having mesogenic molecules chemically bonded thereto as side chains which are obtained by grafting vinyl-substituted mesogenic molecules to an organohydrogenpolysiloxane. The organopolysiloxane backbone may also carry different molecules, such as nematogenic and cholesterogenic or chiral molecules, as side chains.

Abstract: A method for the manufacture of organopolysiloxanes for use in abhesive coating materials wherein organopolysiloxanes having the formula ##STR1## in which R.sup.1 is an alkyl group with 1 to 4 carbon atoms, a vinyl group and/or a phenyl group, with the proviso that at least 90 mole percent of the R.sup.1 groups are methyl groups,a has a value 1.8 to 2.2, andb has a value of 0.004 to 0.5,are reacted with at least equimolar amounts of pentaerythritol triacrylate or pentaerythritol trimethacrylate and separating the product from the solid components suspended therein. The organopolysiloxanes can be rapidly cured and simultaneously fixed on the carrier.

Abstract: The present invention relates to a process for obtaining dilane derivatives of sepiolite by reaction with alkoxy-silanes to improve their reinforcing capacity in polymers, the reaction being carried out by placing the finely divided sepiolite and the alkoxy-silane in close contact, either by vaporization of the latter by the action of heat or by the spraying thereof with nitrogen, the contact taking place in countercurrent in a column of suitable dimensions, the reaction temperature ranging between room temperature and the vaporization temperature of the alkoxy-silane, further characterized in that the silane derivative of the sepiolite is subsequently dried to 110.degree. C. to remove the reaction byproducts.

Abstract: A hydrocarbon fuel very highly improved in combustion efficiency and not generating any harmful substances. It is obtained by adding a compound of organic silicon of the formula, (SiCH.sub.2 CH.sub.2 COOH).sub.n O.sub.3, to an ordinary hydrocarbon fuel, such as gasoline, kerosene or the like.

Abstract: This invention relates to organosiloxanes which have SiC-bonded ester groups and contain at least one unit of the general formula:ROOCCH.sub.2 CH(COOR)CH.sub.2 CHR'CH.sub.2 Si(CH.sub.3).sub.a O.sub.3-a/2in which R represents the same or different monovalent hydrocarbon radicals having from 1 to 12 carbon atoms, which are free of aliphatic unsaturation and which may contain one ether oxygen atom; R' represents hydrogen or a methyl group (CH.sub.3) and a is 0, 1 or 2. These organosiloxanes can be prepared by hydrolyzing or co-hydrolyzing silanes of the general formula:ROOCCH.sub.2 CH(COOR)CH.sub.2 CHR'CH.sub.2 Si(CH.sub.3).sub.a X.sub.3-a,where R, R' and a are the same as above and X represents the same or different hydrolyzable atoms or groups. Also, they may be prepared by the addition of a diester of allyl succinic acid and/or methallyl succinic acid to an organosiloxane containing Si-bonded hydrogen.