Abstract: An aqueous emulsion composition suitable for treating cellulosic or masonry surfaces to render them water repellent is disclosed, said composition comprising:(i) an alkoxysilane of the formulaR.sub.n Si(OR').sub.4-nwherein R is an alkyl radical, an alkenyl radical, phenyl, chloropropyl or trifluoropropyl, n is 1 or 2 and R' is an alkyl radical having 1 to 6 carbon atoms;(ii) a silane coupling agent of the formulaR".sub.m R'".sub.p Si(OR').sub.4-m-pwherein R" is selected from the group consisting of amino and quaternary ammonium organofunctional groups, R'" is an alkyl radical having 1 to 4 carbon atoms, R' has its previously defined meaning, m is 1 or 2 and p is 0 or 1, with the proviso that m+p is 2 or less and the molar ratio of said alkoxysilane (i) to said silane coupling agent (ii) is 0.5:1 to 3:1; and (iii) a polyisobutylene polymer, and preferred emulsions of the invention further comprising a wax component.

Abstract: There is disclosed a polyamide molding composition characterized by excellent moldability, release and lubricity, said composition comprising:(A) 100 parts by weight of a polyamide resin;(B) 0.1 to 120 parts by weight of a polydiorganosiloxane that contains neither carboxyl nor amino groups; and(C) a polysiloxane selected from the group consisting of carboxyl-containing polydiorganosiloxane and amino-containing polydiorganosiloxane, the amount of said polysiloxane (C) being 0.01 to 50 parts by weight for each 100 parts by weight of said component (B).

Abstract: A silicone composition having utility as an oil and water repellent coating for substrates when cured thereon is disclosed, said composition comprising:(A) 100 parts by weight of an organopolysiloxane that has a viscosity at 25.degree. C. of at least 40 centipoise and that contains at least 2 alkenyl groups in each molecule;(B) from 0.1 to 40 parts by weight of an organohydrogenpolysiloxane that contains at least 2 silicon-bonded hydrogen atoms in each molecule;(C) from 0.01 to 10 parts by weight of a perfluoroalkyl-containing organosilane having the general formula ##STR1## wherein R.sup.1 represents a monovalent hydrocarbon group, R.sup.2 represents a divalent hydrocarbon group, a is 2 or 3, and n is a number having a value of 4 to 12, with the proviso that R.sup.1 is not an alkenyl group; and(D) a catalytic quantity of a hydrosilylation-reaction catalyst.

Abstract: A free-flowing silicone polymer powder, having an average particle size of 1 to 1000 microns and prepared by mixing a polydiorganosiloxane with a silica filler, is uniformly dispersed in an organic resin using conventional equipment, such as a single screw or, preferably, a twin screw extruder. When employed at a concentration of about 0.5 to 25 parts by weight of powder per 100 parts by weight of resin, a significant improvement in the burn character of the modified resin is obtained such that the rate of heat release, generation of smoke and evolution of toxic carbon monoxide gas is significantly reduced relative to the unmodified resin.

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: There is disclosed a foam control composition comprising (I) a silicone defoamer reaction product and (II) a silicone glycol copolymer, which composition is particularly effective in defoaming highly acidic or highly basic aqueous systems. Component (I) is prepared by heating a mixture of (i) a polyorganosiloxane fluid, (ii) a resinous silicon compound, (iii) a finely divided filler and (iv) a catalytic amount of a compound for promoting the reaction of the other components at a temperature of 50.degree. C. to 300.degree. C.

Abstract: A fluorine-containing organosilicon compound and a method for its preparation are disclosed, said compound having the general formula ##STR1## in which R.sup.1 represents a monovalent hydrocarbon group, excluding alkenyl group, R.sup.2 represents a divalent organic group, a is 2 or 3, and m is an integer having a value of 4 to 12.

Abstract: A method for enhancing the dielectric properties of a new or in-service electrical cable is disclosed, the method comprising supplying the interstitial void space of the cable's conductor with a water-reative antitreeing agent having a diffusion coefficient of at least 1.times.10.sup.-7 cm.sup.2 /second at 50.degree. C. in the insulation of the cable and having an initial viscosity of .ltoreq.100 cP at 25.degree. C. The instant method provides a more symmetrical distribution of dielectric enhancing fluid in the insulation than prior art fluids and results in a significant reduction in cable treatment time.

Abstract: A method for enhancing the dielectric properties of a new or in-service electrical cable is disclosed, the method comprising supplying the interstitial void space of the cable's conductor with a fluid mixture comprising(A) an antitreeing agent; and(B) a water-reactive compound,wherein (B) has a diffusion coefficient of at least 1.times.10.sup.-7 cm.sup.2 /second at 50.degree. C. in the insulation of the cable and the mixture has an initial viscosity of .ltoreq.100 cP at 25.degree. C. The instant method provides a more symmetrical distribution of dielectric enhancing fluid in the insulation than prior art fluids and results in a significant reduction in cable treatment time.

Abstract: A curable fluorosilicone resin composition is disclosed, which composition comprises(A) 100 parts by weight of a fluorosilicone resin consisting essentially of F(CF.sub.2)aCH.sub.2 CH.sub.2 SiO.sub.3/2) siloxane units and, optionally, R.sub.b SiO.sub.(4-b)/2 siloxane units, wherein R is a substituted or unsubstituted monovalent hydrocarbon group having 1 to 8 carbon atoms, a is an integer with a value of at least 4 and b is an integer with a value of 0 to 3, with the proviso that when said fluorosilicone resin contains said R.sub.b SiO.sub.(4-b)/2 siloxane units, the ratio of said F(CF.sub.2).sub.a CH.sub.2 CH.sub.2 SiO.sub.3/2 siloxane units to said R.sub.b SiO.sub.(4-b)/2 siloxane units is at least 1;(B) 1 to 90 parts by weight of a component selected from the group consisting of an organosilane and its partial hydrolysis product, said organosilane having the general formula R.sup.1.sub.c SiX.sub.4-c wherein R.sup.

Abstract: A silicone pressure-sensitive adhesive composition having high adhesion and tack while having a high percentage of adhesive failure when peeled from substrates is disclosed, said composition consisting essentially of(A) 50 to 80 parts by weight of an MQ organopolysiloxane resin;(B) 20 to 50 parts by weight of a polydiorganosiloxane having at least 3 alkenyl groups in its molecule, with the proviso that the alkenyl group content of said polydiorganosiloxane is 0.1 to 4 mole percent, the total amount of components (A) and (B) being 100 parts by weight;(C) an organohydrogenpolysiloxane crosslinking agent having, on average, at least 3 SiH groups per molecule, the amount of said organohydrogenpolysiloxane being sufficient to provide a molar ratio of said SiH groups of component (C) to said alkenyl groups of component (B) in the range of 0.1 to <1.0; and(D) a curing amount of a hydrosilation catalyst.

Abstract: There is disclosed a fluorosilicone composition which, when cured onto a substrate such as paper, provides a surface which readily releases such tacky materials as silicone pressure-sensitive adhesive, said composition comprising(A) 100 parts by weight of an organopolysiloxane that contains in each molecule at least 1 fluorine-containing organic group and at least 2 alkenyl groups;(B) 0.1 to 40 parts by weight of an organohydrogenpolysiloxane that contains at least 2 silicon-bonded hydrogen atoms in each molecule;(C) 0.01 to 20 parts by weight of an organopolysiloxane that contains in each molecule at least 1 fluorine-containing organic group, with the proviso that said organopolysiloxane (C) contains neither alkenyl groups nor silicon-bonded hydrogen groups; and(D) a catalytic amount of a hydrosilylation catalyst.

Abstract: A siloxane powder composition which can impart improved lubricity character to a thermoplastic resin is disclosed, said composition being prepared by mixing(A) 100 parts by weight of a liquid polydiorganosiloxane and(B) 40 to 200 parts by weight of a silica powder that has a specific surface of at least 50 m.sub.2 /g using sufficient shear to prepare a powder in which the surface of component (B) is coated with component (A), and then mixing this powder with(C) 10 to 50 parts by weight of a polyorganosiloxane resin which is a solid at room temperature, said resin consisting essentially of (R.sub.3 SiO.sub.1/2) siloxane units and (SiO.sub.2) siloxane units in the molar ratio of 1:4 to 1:1,where R is selected from the group consisting of alkyl radicals and phenyl radical.

Abstract: A diorganosiloxane polymer suitable for modifying thermosetting resins and its preparation are disclosed, said polymer being terminated at each molecular end with an epoxy group-containing organopolysiloxane residue of the following general formula ##STR1## wherein R.sup.1 is a monovalent hydrocarbon group free of alkenyl groups, R.sup.2 is selected from the group consisting of hydrogen and a monovalent hydrocarbon group free of alkenyl groups, R.sup.3 is a monovalent group selected from the group consisting of an epoxy group-containing organic group and an alkoxysilylalkyl group, with the proviso that at least one R.sup.3 group is an epoxy group-containing organic group, R.sup.4 is a divalent hydrocarbon group, a is zero or a positive number, b is a positive number, c is a positive number, a/c is a positive number in the range of zero to 4, b/c is a positive number in the range of 0.05 to 4, and (a+b)/c is a positive number in the range of 0.2 to 4.

Abstract: A moisture-curable silicone hot-melt adhesive composition is disclosed, which composition comprises(i) a solid hydroxyl-functional organopolysiloxane resin comprising R.sub.3 SiO.sub.1/2 siloxane units and SiO.sub.4/2 siloxane units in a molar ratio of 0.5/1 to 1.2/1, wherein R is selected from hydrocarbon or halogenated hydrocarbon radicals;(ii) a diorganopolysiloxane polymer having silicon-bonded hydroxyl terminal groups and having a viscosity at 25.degree. C. of 100 to 500,000 centipoise, the weight ratio of said resin (i) to said polymer being (ii) in the range 40:60 to 75:25;(iii) a ketoximosilane, the amount of said ketoximosilane being sufficient to provide a molar ratio of X groups to total hydroxyl groups on said resin (i) and said diorganopolysiloxane (ii) of 0.9 to 3; and(iv) optionally, sufficient catalyst to accelerate the cure of said composition, said composition being an essentially solvent-free non-slump solid at room temperature, being extrudable at .ltoreq.150.degree. C.

Abstract: A method for the preparation of a random diorganosiloxane-diorganosilazane copolymer is disclosed, which method comprises polymerizing(A) a mixture or polymerization reaction product of(a) a hexaorganodisiloxane and(b) a cyclic diorganosiloxane with(B) a cyclic diorganosilazane of the formula ##STR1## wherein R.sup.1 is a monovalent hydrocarbon group, R.sup.2 is hydrogen or a monovalent hydrocarbon group and n is 3 or 4, the polymerization being carried out in the presence of cesium hydroxide.

Abstract: A fluorosilicone polymer, and a curable composition having utility as a release coating which contains the polymer, are disclosed, said polymer having the structureT(F(CF.sub.2).sub.a C.sub.2 H.sub.4 CH.sub.3 SiO).sub.x (RCH.sub.3 SiO).sub.y (QCH.sub.3 SiO).sub.z Twherein T is a monovalent group selected from triorganosiloxy radicals or hydroxyl radical, R is a monovalent group selected from hydrocarbon radicals or substituted hydrocarbon radicals, Q is an alkenyl radical having 4 to 8 carbon atoms, a is an integer having a value of at least 4, x, and z are integers, each having a value of at least 1, y is an interger having a value of 0 or at least 1, with the proviso that (x+y+z).gtoreq.50, x/(x+y+z).gtoreq.0.25 and z/(x+y+z) .ltoreq.0.1.

Abstract: The present invention relates to a polyester-fiber-treatment agent that can impart smoothness and flexibility to polyester fiber at the same time that it also equips the polyester fiber with nonflammability. The treatment agent for the polyester fiber is based on an organosilicon compound that contains an organic group comprising a bromine-containing organic group bonded to silicon via carbon where the organosilicon compound has a bromine content of at least 5 weight percent.

Abstract: An organocyclosiloxane having utility as a coupling agent is disclosed, said organocyclosiloxane having the general formula ##STR1## wherein R.sup.1 is independently selected from monovalent hydrocarbon groups having 1 to 8 carbons, R.sup.2 is selected from the group consisting of an alkoxy group and an alkoxysilylalkyl group, R.sup.3 is an organofunctional group selected from the group consisting of glycidoxyalkyl, methacryloxyalkyl, N-(trialkylsilyl)aminoalkyl, (hydroxyphenyl)alkyl and haloalkyl, x is 1 to 6 and y is 1 to 6, with the proviso that x+y is an integer having a value of 3 to 8.

Abstract: Coupling agent and primer compositions comprising a conventional silane coupling agent (1), and a disilyl crosslinker compound (II) of the general formula(RO).sub.3 SiR'Si(OR).sub.3where RO denotes a hydrolyzable group, R' denotes a divalent organic radical, and the weight ratio of (I) to (II) is between 1:99 and 99:1 inclusive.