Abstract: A method of de-hazing distillate fuel is disclosed which comprises adding to the fuel a solution of a halide salt dissolved in an alcohol, and an alcohol soluble organosiloxane. The halide salt may be the chloride of magnesium, cadmium, copper, nickel or the tetra methyl ammonium group, for example the salt may have the formula MgCl.sub.2.6H.sub.2 O or (CH.sub.3).sub.4 NCl. The organosiloxane may be a cyclic, linear or branched material and may have e.g. a minor amount of siloxane units having the general formula ##EQU1## and a minor amount of siloxane units having the general formula ##EQU2## in which each R represents a substituted or unsubstituted hydrocarbon group of up to ten carbon atoms, a has the value 0, 1, 2, or 3, b has the value 0, 1 or 2, c has the value 1 or 2, and each Z represents a group linked to the silicon atom and comprising a functional organic group. Each group Z may be a group selected from the polyoxyalkylene group R'(OCH.sub.2 CH.sub.2).sub.p (OCH.sub.2 CH.CH.sub.3).sub.

Abstract: Polysilanes having higher molecular weight are prepared in a higher yield by reacting diorganodihalosilanes with an alkali metal at a temperature of at least 150.degree. C. in a medium which comprises a solvent in which the diorganodihalosilane is soluble. Preferred solvents comprise siloxanes, particularly cyclic dimethylsiloxanes.

Abstract: An organopolysiloxane composition comprising (1) a polydiorganosiloxane, (2) an organosiloxane having at least one silicon-bonded group selected from anilinophenoxy and naphthylaminophenoxy groups and (3) a siloxy metal compound wherein the metal is Ti, Zr or Hf, or a zirconium salt of a monocarboxylic acid.The compositions are stabilized against high temperature oxidative degeneration and are useful inter alia as viscous coupling fluids for automobile fan clutches.

Abstract: The specification discloses a method of de-hazing distillate fuel which comprises adding to the fuel an organosiloxane having at least one quaternary ammonium substituted siloxane unit having the general formulaR.sub.a ZSiO.sub.(3-a)/2 (i)in which a has the value of 1 or 2, each R represents a substituted or unsubstituted hydrocarbon group of up to 10 carbon atoms provided that one of the Rs may be a hydroxyl group when a has the value 2, Z represents a quaternary ammonium groupR'N.sup.+ (R.sup.2).sub.3 X.sup.- (ii)linked to the silicon atom of the siloxane unit, R' represents a divalent hydrocarbon group linking the silicon and nitrogen atoms, each R.sup.2 represents an alkyl group having up to 20 carbon atoms and X.sup.- represents a halogen ion. Preferred organosiloxanes also comprise siloxane units according to the general formulaR.sub.b SiO.sub.

Abstract: Organosilanes and organosiloxanes characterized by the group .tbd.SiQSO.sub.3.sup.- Na.sup.30 in which Q is alkylene or phenylene are prepared by reacting the corresponding mercaptopropylsubstituted silanes and siloxanes with sodium permanganate.The products have surface active properties and are useful as emulsifying agents and for reducing the surface tension of aqueous media.

Abstract: Improved pharmaceutical delivery devices which can deliver hydrophilic or polar pharmaceutically active materials, as well as optionally hydrophobic or non-polar materials, have small particles with on average a diameter below 20 microns of a drug component comprising the hydrophilic or polar pharmaceutically active material, dispersed in a silicone matrix. These devices are produced by using certain organopolysiloxane-polyoxyalkylene copolymers. Preferably an emulsion of the drug component in a silicone containing composition is made before curing the composition to an elastomer.

Abstract: A process for preparing polysilanes of the general formula (RSi).sub.n wherein each R denotes independently an alkyl, aryl, alkaryl or aralkyl group having from 1 to 18 carbon atoms and n is at least 8, comprises reacting at least one silane of the general formula RSiX.sub.3 wherein R is as defined above and X denotes a halogen atom with an alkali metal in an organic liquid medium in which the silane is soluble, preferably tetrahydrofuran.

Abstract: Foam control agents for inclusion in detergent compositions in powder form, are particulate and comprise a silicone antifoam compound and an organic material which is a fatty acid or a fatty alcohol, having 12 to 20 carbon atoms, or a mixture thereof and which has a melting point in the range 45.degree. to 80.degree. C. and is insoluble in water. The foam control agents are made by a process in which the antifoam and the organic material are contacted in their liquid phase. These foam control agents give a good storage stability in the detergent powders.

Abstract: A composition which is curable to an elastomer comprising (1) a siloxane gum having a Williams plasticity of at least 100 mm/100 at 25.degree. C., (2) a reinforcing silica filler, (3) a copolymer of R.sub.3 SiO.sub.0.5 units and SiO.sub.2 units in which R represent a monovalent hydrocarbon group having less than 7 carbon atoms, (4) mica and (5) an organic peroxide curing agent.The compositions are useful for providing fire resistant insulation on electrical equipment.

Abstract: A curable composition comprising (A) a siloxane-polyester copolymer, (B) one or more solvents for the siloxane-polyester copolymer, (C) a silane having silicon-bonded alkoxy or alkoxy-alkoxy groups and a silicon-bonded substituent containing an epoxy group, (D) aluminium acetylacetonate and (E) a tetraalkyl titanate.The compositions are heat-curable and are useful for the formation of protective and decorative coatings on substrates such as metals and plastics.

Abstract: Silanes and organosiloxanes having the group ##STR1## wherein Q represents an olefinically-saturated divalent hydrocarbon group and Y represents --O--or --NH--.They can be prepared by the reaction of sodium sulphite or sodium bisulphite on the ester or amide ##STR2## and are useful as surface active agents.

Abstract: A method for making siloxane resins consisting essentially of tetravalent SiO.sub.2 units and monovalent R.sub.3 SiO.sub.0.5 and H.sub.a R.sub.3-a SiO.sub.0.5 units wherein each R denotes an alkyl group or an aryl group having less than 9 carbon atoms and a denotes 1 or 2, comprises reacting in the presence of an acidic catalyst a siloxane resin consisting essentially of R.sub.3 SiO.sub.0.5 units and SiO.sub.2 units with (H.sub.a R.sub.3-a Si).sub.2 O, where R and a are as defined above. Novel resins wherein only 0.1 to 30 percent of the monovalent units have SiH groups are also disclosed.

Abstract: Water-in-oil compositions having a continuous oil phase comprising a silicone and a hydrocarbon cleaning component, a discontinuous water phase, comprise as emulsifier an organopolysiloxane of the formulaZ(Me).sub.2 SiO[(Me).sub.2 SiO].sub.x [(Me)(R)SiO].sub.y [(Me)(QR')SiO].sub.z --Si(Me.sub.2)Zwhere Me denotes methyl, Q a polyoxyalkylene radical, R a C.sub.6 -C.sub.16 alkyl radical, R' an alkylene and Z a monovalent radical. The organopolysiloxane allows stability and easy emulsification of water into an oil phase comprising those silicones and hydrocarbons which are preferred in polishes.

Abstract: The specification discloses a method of controlling foaming of liquid hydrocarbon fuels (e.g. diesel fuel and jet fuel) by inclusion therein of certain siloxane polyoxyalkylene copolymer as antifoam agents. The copolymers have an average molecular formula such that oxyalkylene groups of the copolymer provide from about 25% to about 65% by weight of the copolymer. Preferred copolymers are according to the general formulaMe.sub.3 SiO(Me.sub.2 SiO).sub.x (MeR'SiO).sub.y SiMe.sub.3in which each Me represents a methyl group, each R' represents a group according to the general formulaQ(OA).sub.n OZin which Q represents a divalent group attached to the silicon atom, each A represents an ethylene group, n has a value from 10 to 15, Z represents a hydrogen atom or a group OCR" in which R" represents a monovalent group and the ratio x:y lies in the range 1:1 to 11:1, more preferably in the range 3:1 to 7:1.

Abstract: Compounds represented by the general formula ##STR1## when a and b are each 0 or 1 and R represents OH or lower alkoxy when a is 1, or OH or -NR'.sub.2 when a is zero. They can be prepared by the reaction of allyl glycidly ether with the appropriate organic acid e.g. salicylic acid.Useful as ultra-violet absorbent substances and as intermediates for the preparation of other such substances, for example by polymerization and copolymerization and by reaction with organosilicon compounds having silicon-bonded hydrogen atoms.

Abstract: A medical-surgical dressing comprising a reinforced sheet of silicone elastomer foam having a thickness not exceeding 10 millimeters, one of the surfaces of the sheet having a surface layer of open cell foam and the other surface having a substantially non-cellular surface skin. The dressing may be manufactured by a process comprising depositing a liquid foamable silicone composition on an absorbent surface, allowing the composition to foam and set to an elastomer and thereafter separating the foam sheet from the substrate.The dressings are useful e.g. for the treatment of wounds, burns and as liners for plaster casts.

Abstract: A siloxane treating composition comprises (1) a mixture and/or a reaction product of (A) a polydiorganosiloxane having at least one silicon-bonded --OX group, X being H, alkyl or alkoxyalkyl and at least one silicon-bonded aminoalkyl or polyaminoalkyl acid salt group, and (B) a silicon compound having more than 2 silicon-bonded groups which are reactive with --OX of (A), and (2) a water-soluble solvent for (A) which comprises one or both glycol ethers of the formula C.sub.4 H.sub.9 --O--(CH.sub.2 --CH.sub.2 --O).sub.n H where n is 1 or 2. These compositions have improved penetration ability and stability, especially when used as aqueous composition for rendering substrates, such as masonry, hydrophobic.Also claimed is a process for making such compositions and a process for applying them to substrates.

Abstract: Organosiloxane-oxyalkylene copolymers in which a silicon atom of at least one organosiloxane unit has attached thereto the group--X(OR).sub.n OSiR'.sub.a (OR").sub.3-awherein X represents a divalent hydrocarbon group, R represents an alkylene group having 2 to 4 carbon atoms, n is an integer of at least 2, R' represents alkyl, vinyl, allyl or phenyl, R" represents alkyl or alkoxyalkyl and a has a value of 1 or 2, at least 40% of the total substituents in the copolymer being methyl.The copolymers are film forming and are particularly suitable for the treatment of textile fibres to facilitate the removal of oily stains during laundering.

Abstract: A textile treating composition, useful as a composition for the softening of textiles during the rinse cycle of a laundry operation, comprises a cationic surfactant which is substantive to water rinse on textiles and a polydiorganosiloxane having at least one amido containing substitutent, preferably of the formula ##STR1## where R is an alkylene group. The composition is preferably utilized in the form of an aqueous dispersion. A process for treating textile fabrics is also described.Textile fabrics when treated with this composition exhibit a less greasy feel than prior art textile fabrics and also have an improved rewet time.

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.