Abstract: The present invention relates to coating compositions comprising a vinyl- or higher alkenyl-enblocked polydiorganosiloxane, a silicon-bonded hydrogen endblocked polydiorganosiloxane, a platinum catalyst, and an inhibitor which increase the release force of pressure sensitive adhesives (PSA's) adhered thereto. The compositions of the present invention can additionally comprise an organohydrogenpolysiloxane crosslinker. The present invention further relates to a method of release control by crosslink density (or bulk modulus) control.

Abstract: Silicone hydraulic compositions, comprising a polydimethylsiloxane fluid and a phenylmethylsiloxane/dimethylsiloxane copolymer having a viscosity at least ten fold greater than said polydimethylsiloxane fluid and having a molar phenylmethylsiloxane content of about 4.5 percent to about 7 percent are disclosed. The fluids exhibit a reduced viscosity temperature coefficient (VTC) relative to conventional polydimethylsiloxane oils and are useful in hydraulic applications such as viscous coupling and viscous damping.

Abstract: A random siloxane copolymer composition, and a process for using the composition in a hydraulic brake system of a vehicle, is described. The random copolymer consists essentially of alkylmethylsiloxane and dimethylsiloxane units, wherein said alkyl group contains from five to ten carbon atoms, and the viscosity of said fluid is 15-50 cS at 25.degree. C. Within a relatively narrow compositional range, these fluids dissolve at least 15% less air than comparable polydimethylsiloxane fluids. Moreover, the copolymer may be readily formulated into brake fluid compositions which meet Department of Transportation (DOT 5) and, in the case of preferred compositions, Military (MIL-B-46176) specifications. The potential benefit of reduced air solubility is an improved margin of safety under harsh driving conditions.

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: Traction fluids containing certain siloxane components and, optionally, certain cycloaliphatic hydrocarbon components are described. These traction fluids possess high traction coefficients and good low temperature viscosity properties which make these fluids ideally suited for use in traction drive systems subjected to wide operating temperature conditions.

Abstract: A particular silicone dielectric fluid, having aliphatic hydrocarbon or substituted aliphatic hydrocarbon substituents, with a specific gravity of at least 1.02, is employed to encapsulate and insulate an electrical cable splice. The same particular silicone dielectric fluid, with a specific gravity of at least 1.02 is also used to fill an electrical cable's conductor interstices.

Abstract: A particular dielectric fluid, having a composition with a specific gravity of at least 1.02 and consisting essentially of a silicone fluid and an additive, soluble in said silicone fluid, selected from the group consisting of trimethylsilyl treated (CH.sub.3).sub.3 SiO.sub.1/2 /SiO.sub.2 resin copolymer, dipropyleneglycoldibenzoate, dixylylethane, phenylxylylethane, and a mixture of [(CH.sub.3).sub.3 Si].sub.2 O treated silica and a silica aerogel, is employed to encapsulate and insulate an electrical cable splice. The same particular dielectric field composition is also used to fill an electrical cable's conductor interstices.

Abstract: A vapor booster diffusion pump is provided with an organosiloxane pump fluid consisting essentially of octamethyl-3,5-diphenyltetrasiloxane.