Abstract: An oligosiloxane having the formula (R1O)aSi(OSiR22R3)4−a wherein R1 is alkyl; each R2 is independently selected from C1 to C10 monovalent hydrocarbyl free of aliphatic unsaturation; R3 is hydrocarbly free of aliphatic unsaturation and having at least 11 carbon atoms; and a is 1, 2, or 3; and a method of preparing an alkoxy-functional oligosiloxane.

Abstract: Liquid silicone rubber compositions that prior to cure have good fluidity and excellent moldability and that cure into a highly flame retardant silicone rubber with excellent high-voltage electrical insulating properties. The liquid silicone rubber compositions comprise: (A) polyorganosiloxane; (B) fumed silica; (C) surface-treated zinc carbonate powder as afforded by treating the surface of (a) zinc carbonate powder or basic zinc carbonate powder with (b) an organosilicon compound selected from organosilanes, organosilazanes, and organosiloxane oligomers; (D) polyorganohydrogensiloxane; and (E) platinum catalyst. The liquid silicone rubber compositions may further comprise (F) surface treated aluminum hydroxide powder, (G) triazole compound, and (H) a reaction mixture of (d) platinum compound and (e) 3,5-dimethyl-1-hexyn-3-ol.

Abstract: A polyoxyethylene alkyl ether fatty acid amide modified organopolysiloxane composition is superior in terms of its feel in use, and in its surface-protecting characteristics, surface lubricating characteristics, and anti-static properties. The composition shows no degeneration over long periods of time. It is superior in terms of its mixing stability in cosmetic based agents, and in lustering agents, lubricating agents, defoaming agents, fiber treatment agents, and paint additives, and has a superior effect in improving their surface characteristics. The composition is a polyoxyethylene alkyl ether fatty acid amide modified organopolysiloxane composition containing an amidopolyether-modified organopolysiloxane and a polyoxyethylene alkyl ether fatty acid.

Abstract: The present invention pertains to a method for the preparation of organosiloxane oligomer with the general formulaR.sup.1.sub.3 SiO(R.sup.2.sub.2 SiO).sub.n Hwhere each R.sup.1 and R.sup.2 are independently monovalent hydrocarbon groups and n has a value of 1 to 10; wherein the method comprises cohydrolyzing a triorganohalosilane and diorganodihalosilane in the presence of a basic compound in a two-layer liquid system comprised of an aqueous layer and an organic solvent layer. The method of the instant invention is a high-yield method for the preparation of organosiloxane oligomer having the silicon-bonded hydroxyl group at only one molecular chain terminal.

Abstract: The introduction of a room-temperature-curable organopolysiloxane composition that exhibits tack during the course of its cure and that forms a cured product strongly adherent to a variety of substrates when cured while in contact with substrate. Also, the introduction of a method for the preparation of this room-temperature-curable organopolysiloxane composition.

Abstract: The present invention relates to silicone release coating compositions comprising (A) a mixture of (i) a dimethylsiloxane-methylvinylsiloxane-methylphenylsiloxane copolymer and (ii) a dimethylsiloxanemethylvinylsiloxane copolymer, (B) an organohydrogenpolysiloxane, (C) a platinum catalyst, and (D) an organic solvent. The silicone release coating compositions of the present invention provide small release resistance values both at low and high peeling velocities and do not impair the residual adhesion of tacky substances that have come into contact with the coating.

Abstract: An organopolysiloxane suitable for modifying curable organic and silicone compositions is disclosed, said organopolysiloxane having the general formula ##STR1## wherein each R.sup.1 is a monovalent group independently selected from the group consisting of hydrocarbon groups and halogenated hydrocarbon groups; R.sup.2 is selected from the group consisting of the hydrogen atom, monovalent hydrocarbon groups and halogenated hydrocarbon groups; R.sup.3 is selected from the group consisting of epoxy-functional organic groups, alkoxysilylalkyl groups and alkyl groups having at least 6 carbon atoms; a is zero or a positive number; b is a positive number; c is a positive number; a/c has a value of zero to <4; b/c has a value of 0.05 to 4; and (a+b)/c has a value of 0.2 to 4, with the proviso that neither R.sup.1 nor R.sup.2 is an alkenyl group and that said organopolysiloxane has in its molecule at least one said epoxy-functional organic group and at least one said alkyl group having at least 6 carbons.

Abstract: A fluorosilicone antifoam having excellent and persistent anti foam activity against foaming in aqueous or organic solvent solutions in which a silicone surfactant or fluorosurfactant is dissolved. The fluorosilcione antifoam includes(A)(a) a fluorosilicone oil with the general formulaF(CF.sub.2).sub.a C.sub.2 H.sub.4 SiMe.sub.2 O(Me.sub.2 SiO).sub.n SiMe.sub.2 C.sub.2 H.sub.4 (CF.sub.2).sub.a Fin which a is an integer with a value of at least 4, n is an integer with a value of 0 to 300, and Me is methyl, or(b) a fluorosilicone oil with the general formulaXR.sub.2 SiO[F(CF.sub.2).sub.a C.sub.2 H.sub.4 SiMeO].sub.n SiR.sub.2 Xin which R is a monovalent hydrocarbon group, X is the F(CF.sub.2).sub.a C.sub.2 H.sub.4 group or a monovalent hydrocarbon group with the proviso that at least 1 of X is the F(CF.sub.2).sub.a C.sub.2 H.sub.4 group, n is an integer with a value of 1 to 300, and a is an integer with a value of at least 4;(B) microparticulate silica with a specific surface of at least 50 m.sup.

Abstract: The present invention relates to a silicone rubber composition for fixing roll service. More specifically, the invention relates to a silicone rubber composition for fixing roll service that is easily molded into a fixing roll as used in devices such as electrophotographic copiers, facsimile machines, and laser printers and that yields a fixing roll with an excellent mechanical strength and excellent toner release properties.

Abstract: Fluorosilicone lubricants comprise (A) a linear and/or cyclic polydiorganosiloxane containing at least one silicon-bonded perfluoroalkylethyl radical with at least four perfluorinated carbon atoms, and an additive selected from 1) heat stabilizers that are reaction products of cerium compounds and alkali metal silanolates or organopolysiloxanes with aminophenyl or naphthylaminophenoxy groups and 2) powdered fluororesins as cold temperature additives.

Abstract: A curable composition suitable for treating substrates in order to render them oil repellent, water repellent and stain resistant, said composition comprising:(A) a fluorine-containing organosilicon compound having the general formula ##STR1## wherein R.sup.1 denotes a monovalent hydrocarbon group, excluding alkenyl groups, R.sup.2 denotes a divalent organic group, a is 2 or 3, and m is an integer having a value of 4 to 12, or a partial hydrolysis and condensation product thereof, and(B) a catalytic quantity of a condensation-reaction catalyst.

Abstract: The introduction of a room-temperature-curable organopolysiloxane composition that cures at room temperature to give a rubber whose surface is easily coated with paint and from which the resulting paint film does not delaminate readily and that after curing is free from staining of the surface of the rubber and any substrates in contact with the rubber.

Abstract: A silicone rubber composition having good processability and good molding properties is disclosed, said composition comprising:(A) an organopolysiloxane containing vinyl groups;(B) a fluorine resin powder;(C) an organopolysiloxane containing units having the formulaF(CF.sub.2).sub.a CH.sub.2 CH.sub.2 Si(Me).sub.n O.sub.3-n/2in which a is an integer of at least 4, n is 0, 1 or 2 and Me denotes a methyl radical;(D) a reinforcing silica powder having a surface area of at least 50 m.sup.2 /g; and(E) a sufficient quantity of a curing agent to cure said composition.

Abstract: The release agent compositions of the present invention comprise mixtures of amino-functional and amine-free polydimethylsiloxanes wherein the viscosity, amine equivalent and content of dimethylsiloxane oligomers containing up to 20 silicon atoms are within specified limits. The compositions do not evolve oily volatiles or silicon dioxide powder even during exposure to elevated temperatures.

Abstract: Diorganopolysiloxane compositions are provided with excellent heat resistance, especially diorganopolysiloxane compositions that are suitable for synthetic fiber lubricants. The diorganopolysiloxane composition is a mixture of (A) a diorganopolysiloxane oil and (B) an amino-group-containing diorganopolysiloxane, and has an average amino equivalent in the range of 10,000-1,000,000 and a viscosity at 25.degree. C. in the range of 10-100,000 cs.

Abstract: The present invention relates to an electroviscous fluid comprising the dispersion in an electrical insulating fluid of an organopolysiloxane having at least one metal sulfonate group in its molecule. The electroviscous fluid of the present invention can further comprise a polyether. The electroviscous fluid of the present invention does not wear or abrade surrounding equipment, is thermally stable, and that has a large electroviscous effect (yield value) and an excellent dispersion stability.

Abstract: An organopolysiloxane suitable for modifying curable organic and silicone compositions is disclosed, said organopolysiloxane having the general formula ##STR1## wherein each R.sup.1 is a monovalent group independently selected from the group consisting of alkyl radicals having 1 to 5 carbon atoms and phenyl radical; R.sup.2 is a monovalent group independently selected from the group consisting of hydrogen, alkyl radicals having 1 to 5 carbon atoms and phenyl radical; R.sup.3 is selected from the group consisting of alkoxysilylalkyl groups and alkyl groups having at least 6 carbon atoms; a is zero or a positive number; b is a positive number; c is a positive number; a/c has a value of zero to <4; b/c has a value of 0.05 to 4; and (a+b)/c has a value of 0.2 to 4, with the proviso that said organopolysiloxane has in its molecule at least one said alkoxysilylalkyl group and at least one said alkyl group having at least 6 carbons.

Abstract: A method for the preparation of a powder mixture of cured silicone microparticles and inorganic microparticles is disclosed, said method comprising (I) forming a water-based suspension of (A) a plurality of cured silicone microparticles having an average diameter of 0.1 to 200 micrometers, (B) a plurality of inorganic microparticles having an average particle diameter of 0.1 to 200 micrometers and, optionally, (C) at least one surfactant; and (II) removing the water from said water-based suspension. The resultant powder mixture is relatively free from agglomeration and may be easily dispersed in organic resins to form a homogeneous mixture for such applications as paints and coatings.

Abstract: Disclosed is a method for the formation of a thick silicon oxide film on the surface of a substrate. The method comprises forming a hydrogen silsesquioxane resin film on the surface of a substrate followed by converting the hydrogen silsesquioxane resin into silicon oxide ceramic by heating the resin film-bearing substrate in a mixed gas atmosphere of above 0 volume % up to 20 volume % oxygen and 80 volume % up to, but not including, 100 vol % inert gas until the content of silicon-bonded hydrogen in the silicon oxide product has reached .ltoreq.80% of the content of silicon-bonded hydrogen in the hydrogen silsesquioxane resin.

Abstract: A film-forming organopolysiloxane composition is disclosed which imparts an excellent releaseability and lubricity to the surface of various types of rubber materials. The composition comprises a solvent dispersion of(a) 50 to 90 weight percent of a block organopolysiloxane copolymer;(b) 2 to 50 weight percent of a compound selected from the group consisting of an organosilane or a partial hydrolyzate thereof;(c) 4 to 40 weight percent of a mixture an epoxy group-containing organoalkoxysilane and an alkenyl group-containing organoacetoxysilane in a weight ratio of 1:9 to 9:1 or a condensation-reaction product thereof;(d) 0.1 to 10 weight percent of an hydroxy or alkoxy terminated diorganopolysiloxane; and(f) 0.1 to 10 weight percent of a condensation-reaction catalyst.