Abstract: By curing or semi-curing an addition curable silicone resin composition comprising a phenyl-containing organopolysiloxane, placing an addition or peroxide curable silicone rubber composition in close contact with the cured or semi-cured resin, and heat curing the silicone rubber composition, there is prepared a composite material in which silicone resin and silicone rubber are firmly joined together.

Abstract: A highly heat-resistant crosslinked polymer is prepared by subjecting an organic-inorganic hybrid polymer consisting of the repeating monomeric units of the formula ##STR1## in which A is a divalent hydrocarbon group such as phenylene group, to an oxidative crosslinking reaction by heating in air at 50.degree. to 400.degree. C.

Abstract: Stable curable silicone compositions, well suited for the deposition of release coatings onto a wide variety of substrates, for example paper or plastic films, comprise a hydrosilylation-curable polyorganosiloxane oil and/or at least one Si alkenylated organopolysiloxane resin and, optionally, at least one organohydrosiloxane resin, an SiH crosslinking agent therefor, a hydrosilylation-inhibiting amount of a long chain acetylenic alcohol, advantageously having a boiling point higher than 250.degree. C., and a catalytically effective amount of a hydrosilylation catalyst, e.g., platinum or a platinum compound/complex.

Abstract: A method of making an organopolysiloxane sheet or tube polymer involves contacting a sheet or tube silicate with an organo-H-chlorosilane to form an organosiloxane sheet or tube polymer with pendent .tbd.Si--H groups. Subsequently, the organosiloxane sheet or tube polymer with pendent .tbd.Si--H groups is contacted with an alkenyl group containing compound in the presence of a hydrosilation catalyst. The catalyst is used in an amount effective to catalyze a hydrosilation reaction between the alkenyl group on the alkenyl group containing compound and the hydride functionality on the organosiloxane sheet or tube polymer with pendent .tbd.

Abstract: Curable organopolysiloxane composition that undergoes a uniform curb by both condensation and addition reactions without being subject to cure inhibition by cure inhibitors and thereby produces cured silicone that is strongly adherent to any of various substrates residing in contact with the composition during its cure. The curable organopolysiloxane composition is a mixture of organopolysiloxane with at least 2 silicon-bonded alkoxy groups in each molecule and organopolysiloxane with at least 2 silicon-bonded lower alkenyl groups in each molecule, an organopolysiloxane containing at least 2 silicon-bonded hydrogen atoms in each molecule, an alkoxysilane of the formula R.sup.1.sub.x Si(OR.sup.2).sub.(4-x) where R.sup.1 is a monovalent hydrocarbon group, R.sup.2 is alkyl or alkoxyalkyl, and x is 0, 1, or 2 or partial hydrolysis condensate thereof, an organozirconium compound or an organoaluminum compound, and a hydrosilylation reaction catalyst in a catalytic quantity.

Abstract: A curable composition providing a cured product having a silicon type interpenetrating polymer network, which comprises (A) a silsesquioxane ladder polymer, (B) a silicon compound having at least two SiH groups per molecule, (C) a silicon compound having at least two vinylsilyl groups per molecule and (D) a neutral platinum catalyst; and a process for producing a molded article comprising heating the curable composition under a controlled temperature for synchronously causing hydrolysis and condensation of the alkoxysilyl group and/or silanol group and hydrosilylation.

Abstract: Compositions, preferably elastomeric compositions, comprise high refractive index polysiloxane-based cross-linked copolymers and high refractive index polymeric resin components. Such compositions, which have refractive indexes of at least about 1.46, preferably at least about 1.48, are useful in producing foldable intraocular lenses.

Abstract: Control of the surface silanol density in silica fillers used in formulating heat curable rubbers enables control of the percent sealing force retention of the composite. Functionalizing the chemical agents used to effect such control adds additional means of controlling the physical properties of the resulting rubbers, especially silicone rubbers.

Abstract: In a silicone composition comprising an aliphatic unsaturated group-containing diorganopolysiloxane and an organohydrogenpolysiloxane, there is blended a hydrosilylation catalyst. The catalyst is obtained by stabilizing a platinum group compound with an organopolysiloxane of formula (3):R.sup.4.sub.f R.sup.5.sub.g (CH.sub.3).sub.h SiO.sub.(4-f-g-h)/2 (3)wherein R.sup.4 is a C.sub.2-8 aliphatic unsaturated group, R.sup.5 is a monovalent hydrocarbon group excluding an aliphatic unsaturated group and methyl group, letters f, g, and h are (f+g)/(f+g+h).gtoreq.0.10, 0.0001<f.ltoreq.2.0, and 1.8<f+g+h<2.205. The stabilized platinum group compound is included in a silicone resin comprising at least a R.sup.6 SiO.sub.3/2 or SiO.sub.4/2 unit wherein R.sup.6 is a monovalent hydrocarbon group, at least 10 mol % of the organic groups being the same group as R.sup.5, the silicone resin having a melting or softening point of 30.degree. to 200.degree. C.

Abstract: A process for producing oxygen-free or low-oxygen shaped bodies of silicon carbide, particularly SiC fibers, by using chemically reactive polysilanes and/or polycarbosilanes as precursors. In accordance with the invention green fibers are stabilized preferably in the presence of reactive gases.

Abstract: Substantially branched alkenyl silicone polymer compositions having on average at least two branching points per molecule provide paper release compositions wherein the delamination force is reduced at all delamination speeds.

Abstract: The present invention provides a bouncing putty with low density and other desirable properties. The density is preferably between 0.33 and 0.95 g/cc, preferably between about 0.5 and 0.75 g/cc and particularly preferably about 0.6 g/cc. Borosilicone rubber base is mixed with density-reducing filler, preferably in the form of thermoplastic microspheres. Addition of a thinning agent reduces stiffness and addition of a lubricating oil improves the handling characteristics. A moisture scavenger can be added to maintain the characteristics of the bouncing putty even if some moisture is absorbed during use. A polarity modifier such as glycerine can be added to soften the putty. If desired, a colorant can be added as well.

Abstract: An addition reaction type silicone rubber composition for injection molding compounded with an azo compound, carbon black, and at least one of cerium hydroxide and cerium oxide is disclosed. Silicone rubber moldings having a small compression set and an excellent flame retardance are obtained without need of carrying out a postcure after primary molding. Further, integral molding of the silicone rubber and a thermoplastic resin can be carried out.

Abstract: Organopolysiloxane sheet or tube polymers are made by contacting a sheet or tube silicate with an alkenyl group containing chlorosilane to form an alkenylsiloxy polymer, and subsequently contacting the alkenylsiloxy sheet or tube polymer with a hydrosilane or hydrosiloxane in the presence of a hydrosilation catalyst, to catalyze a reaction between the alkenyl group on the alkenylsiloxy polymer and hydride functionality on the hydrosilane or hydrosiloxane. Silylalkoxysiloxane sheet or tube polymers are made by contacting a sheet or tube silicate with an acidic solution of an alkenyl alcohol to form a polymeric sheet or tube alkenyloxysiloxane, and subsequently contacting the alkenyloxysiloxane with a hydrosilane or hydrosiloxane in the presence of a hydrosilation catalyst, to catalyze a reaction between the alkenyl group on the alkenyloxysiloxane and hydride functionality on the hydrosilane or hydrosiloxane.

Abstract: Organosilicon polymers, including crosslinked polymers and crosslinkable prepolymers, of cyclic polysiloxanes, organic dyes, and, optionally, polyenes. The dyes include those with delocalized Pi electron systems linking electron donor groups and electron acceptor groups, and with at least two carbon-carbon double bond-containing pendant groups attached to at least two different sites from among the indicated delocalized Pi electron systems, donor groups, and acceptor groups. Also disclosed are optical substrates coated with the organosilicon crosslinked polymers exhibiting second order non-linear optical susceptibility.

Abstract: Pressure sensitive silicone adhesive compositions having excellent peel adhesive strength, high tack and excellent quick stick capability are provided. Generally the adhesive composition is made of a MQ resin and a silicone gum, to which a silicone fluid is added. A cure catalyst can then be added to the mixture prior to coating.

Abstract: The invention involves a silicone gel composition comprising (A) 100 parts by weight of an organopolysiloxane of average compositional formula (1):R.sup.1.sub.a R.sup.2.sub.b SiO.sub.(4-a-b)/2 (1)wherein R.sup.1 is an alkenyl group: R.sup.2 is an optionally substituted, monovalent hydrocarbon group without an aliphatic unsaturated bond and the subscripts a and b are positive numbers 0<a<3, 0<b<3, and 1<a+b<3,(B) 0.05 to 10 parts by weight of an organosiloxane oligomer having alkenyl groups bound to silicon atoms only at the terminal ends of the molecule and at least three such alkenyl groups per molecule,(C) an organohydrogen polysiloxane having at least two hydrogen atoms bound to silicon atoms per molecule, and(D) a catalytic amount of an addition reaction catalyst. The invention also involves electronic materials coated therewith.

Abstract: A novel curable organopolysiloxane-epoxy resin composition, which is capable of giving a cured body having excellent mechanical properties without the problem of adhesion to the metal mold, is proposed. The composition comprises: (a) an epoxy resin; (b) an organopolysiloxane containing vinyl groups; (c) an organohydrogenpolysiloxane as the crosslinking agent of the component (b); (d) a platinum compound as a catalyst for the hydrosilation reaction; and (e) a specific organic aluminum compound, such as tris(acetylacetonato) aluminum, each in a specified proportion.

Abstract: The present invention relates to storage-stable polysiloxane compositions which give permanently water-wettable elastomers. The polysiloxane compositions of the present invention which vulcanize to yield elastomers are useful as dental impression compositions.

Abstract: Silicone adhesive compositions having excellent quick stick, peel and tack adhesion properties are provided. Generally the adhesive composition is the reaction mixture of a silanol-containing siloxane resin, a silicone polymer gum, and a silicone fluid containing functionality capable of reacting with silanol and silanol-like groups; optionally, a solvent; and a cure catalyst are added.

Abstract: Hot-melt silicone pressure sensitive adhesive compositions containing organic waxes, methods of using the compositions and devices made using the compositions are disclosed. The hot-melt silicone pressure sensitive adhesive compositions include a mixture of (i) a silicate resin, (ii) a silicone fluid, and (iii) an organic wax having a melting point of between 30.degree. C. and 150.degree. C. The organic wax decreases dynamic viscosity of the adhesive at temperatures equal to or below about 200.degree. C.

Abstract: Linear or straight-chain trimethylsiloxy endcapped methylhydrogen polysiloxanes are made by contacting hexamethyldisiloxane with a highly pure methylhydrogen cyclic siloxane, in the presence of anhydrous trifluoromethane sulfonic acid catalyst at room temperature. Trimethylsiloxy endcapped alkylmethyl siloxanes are made by reacting the linear or straight-chain trimethylsiloxy endcapped methylhydrogen polysiloxanes with an alpha-olefin, in the presence of a platinum catalyst. Alkylmethyl cyclic siloxanes containing zero parts per million residual .tbd.SiH, are made by reacting anhydrous alpha-olefins and a highly pure methylhydrogen cyclic siloxane, in the presence of dried platinum supported on carbon catalyst.

Abstract: Crosslinkable copolymers suitable for use as elevated temperature pressure-sensitive adhesives comprise randomly arranged silarylene units and siloxane units. Preferably, there is present in the copolymer backbone in the range of 0.8 to 1.2 siloxane to silarylene units, and there being present in the copolymer a crosslinking functionality.

Abstract: An addition curable silicone pressure sensitive adhesive composition having high lap shear strength particularly at elevated temperatures is described; containing (A) an aromatic soluble, MQ resin or resinous copolymer having R.sub.3 SiO.sub.1/2 and SiO.sub.4/2 ; (B) an alkenyl-containing polydiorganosiloxane having a viscosity of at least about 3,000 centipoise at 25.degree. C.; (C) a set of multi-functional silicones as crosslinkers; (D) from 0 to about 100 parts by weight of a reaction mixture containing from 60 to 100 parts by weight of Component (A) and from about 40 to 0 parts by weight of Component (B); (E) a hydrosilylation catalyst; and optionally (F) from 0 to about 40% by weight of an organic solvent.

Abstract: A gel-forming silicone composition comprising (A) an organopolysiloxane containing a silicon-bonded alkenyl group or groups in an average amount of from 0.15 to 0.35 mol % based on all silicon-bonded organic groups contained per molecule, (B) a non-functional organopolysiloxane, (C) an organohydrogenpolysiloxane containing an average of 2 silicon-bonded hydrogen atoms per molecule, and (D) an addition reaction catalyst. The silicone composition is able to give a gel-like cured silicone product with low modulus of elasticity while retaining flexibility.

Abstract: A method for making a fluorinated polydiorganosiloxane base composition and the composition prepared thereby. The base composition can be addition cured using a platinum-metal group catalyst and an organohydrogensiloxane crosslinker to form a fluorosilicone elastomer having improved resiliency and compression set properties.

Abstract: Addition-curable platinum group metal catalyzed silicone compositions are provided which utilize an adhesion promoter in the form of a Michael reaction product of a bis(aminoalkyl)tetraalkyldisiloxane, such as bis(aminopropyl)tetramethyldisiloxane, with an acryloxyorganotrialkoxysilane, for example, acryloxypropyltrimethoxysilane. The addition-curable silicone compositions can bond to plastic and metal substrates at temperatures of less than 100.degree. C. and in less than 1 hour, forming composites which fail cohesively upon separation.

Abstract: A resin composition curable through a Michael reaction between (a) a component having a plurality of .alpha., .beta.-unsaturated carbonyl groups and (b) a component having a plurality of activated methylene, activated methyne or hydroxyl groups is disclosed. The curing reaction is catalyzed with a quaternary ammonium, quaternary phosphonium or tertiary sulfonium salt in the presence of an epoxy compound independently added to the composition or covalently attacted to either component (a) or component (b).

Abstract: A silicone rubber composition is prepared by mixing 100 parts by weight of an alkenyl-containing organopolysiloxane having a degree of polymerization of at least 3,000 and 5 to 30 parts by weight of finely divided silica having a specific surface of at least 50 m.sup.2 /g with 0.5 to 10 parts by weight of an organopolysiloxane resin having a weight average molecular weight of 500 to 50,000, a OH group content of 0.0001 to 0.01 mol/g, and a liquefying temperature of 50.degree. to 150.degree. C., at a temperature above the liquefying temperature of the resin. The composition has high plasticity in an uncured base compound form and is effective for extrusion molding. The composition cures into silicone rubber having low hardness, good flexibility and excellent physical properties, finding a variety of applications.

Abstract: Compositions in the form of aqueous dispersions which contain dihydroxypolyorganosiloxanes, amino-functional silanes and cyclic oligosiloxanes and/or reaction products of these components, are suitable for coating sheet materials made of fiber materials. This confers, to the sheet materials, good waterproofness properties with good permanency of the waterproofness, good low-temperature flexibility and springiness.

Abstract: The present invention provides organosiloxane compositions that cure to optically transparent gels by a hydrosilation reaction and contain a) two types of alkenyl-substituted organopolysiloxanes, and b) a diorganopolysiloxane containing an average of at least two silicon-bonded hydrogen atoms per molecule that are located on non-terminal silicon atoms. The molar ratio of silicon-bonded hydrogen atoms to alkenyl radicals in the composition is from 0.1 to 1.2.

Abstract: An addition curing type silicone rubber composition comprising an aliphatic unsaturated group-containing organopolysiloxane, an organohydrogenpolysiloxane and a platinum series catalyst is further blended with a triazine or sulfide control agent to provide a composition which is stable and resistant against premature gelation at room temperature and thus has long-term storage stability. Heating causes the composition to be quickly vulcanized at an acceptable rate into a silicone rubber having satisfactory physical properties.

Abstract: The introduction of release coating-forming silicone compositions that yield cured release coatings that exhibit excellent release properties against tacky substances and do not impair the residual adhesion of tacky substances.Silicone composition for the formation of cured release coatings, that characteristically comprises(A) 100 weight parts of a cured coating-forming silicone composition into which there is admixed(B) 0.5 to 500 weight parts organosilicon polymer with the following average unit formula ##STR1## wherein R represents C.sub.1 to C.sub.10 monovalent hydrocarbon groups that are free of aliphatic unsaturation; R.sup.1 represents organic groups selected from the group consisting essentially of C.sub.2 to C.sub.20 alkylene groups and organic groups with the formulas --R.sup.3 (OR.sup.3).sub.y -- and --R.sup.3 --(R.sub.2 SiO).sub.z R.sub.2 Si--R.sup.3 -- (R is defined as above, R.sup.3 denotes C.sub.2 to C.sub.

Abstract: Silicone pressure sensitive adhesive compositions which cure in the presence of moisture comprise an adhesive component which bears alkoxy radical-containing curing radicals and, optionally, a catalyst to accelerate the reaction of moisture with the alkoxy radicals to form siloxane bonds. Curing provides adhesives ranging from pressure sensitive adhesives having improved properties to permanent adhesives. The adhesives are useful for adhering an object to a surface and thereafter improving the bond between the object and the surface by exposure to moisture.

Abstract: Disclosed are denture adhesive compositions possessing improved aesthetics and comprising a component which provides for easy removal of the adhesive from the denture and a hydrophilic powder.

Abstract: An adhesive silicone composition comprising a diorganopolysiloxane, an organohydrogenpolysiloxane, and a platinum catalyst is blended with an organohydrogenpolysiloxane having at least two hydrogen atoms each bonded to a silicon atom in a molecule and containing an aromatic ring-bearing hydrocarbon radical in an amount of at least 12 mol % of the entire monovalent organic radicals bonded to silicon atoms, or a compound containing at least one hydrogen atom bonded to a silicon atom in a molecule and having a radical of two benzene rings separated by --R.sup.13 R.sup.14 Si--, --R.sup.13 R.sup.14 SiO--, --OR.sup.13 R.sup.14 SiO-- or --R.sup.13 R.sup.14 SiOR.sup.13 R.sup.14 Si-- wherein R.sup.13 and R.sup.14 are a monovalent hydrocarbon radical. The composition firmly adheres to organic resins, but is readily releasable from metal molds.

Abstract: An aqueous silicone coating composition containing a reactive siloxane polymer and a non-reactive dimethylpolysiloxane in an aqueous carrier having an effective amount of at least one dispersing agent to disperse the siloxanes throughout the aqueous carrier. Also provided is a method of lubricating substrates by applying an aqueous silicone coating composition to the substrate and curing the silicone thereon, as well as lubricated surgical needles prepared by that method.

Abstract: The invention is a curable composition whose essential structural elements are M and Q units and which provides a cured product that has a flexural modulus capable of withstanding practical applications. The curable organopolysiloxane composition comprises (A) an alkenyl-functional organopolysiloxane whose main components are the R.sup.1.sub.3 SiO.sub.1/2 and SiO.sub.4/2 units where R.sup.1 represents monovalent organic groups, (B) an SiH-containing organopolysiloxane whose main components are the R.sup.2.sub.3 SiO.sub.1/2 and SiO.sub.4/2 units where R.sup.2 represents the hydrogen atom and monovalent organic groups and (C) a platinum catalyst. In addition, the composition exhibits a post-cure flexural modulus of at least 100 MPa.

Abstract: The present invention relates to a method for the preparation of silicone resins, the method comprising the steps of (I) mixing (a) a silicone resin, (b) an organic solvent, and (c) an acid catalyst to form a reaction product, and (II) reacting a diorganopolysiloxane or tetraorganodisiloxane with the reaction product of (I) at a temperature of 50.degree. C. to 150.degree. C. The present invention also relates to resins produced by the method of the present invention.

Abstract: Compositions which comprise(A) a polymeric organosilicon compound having 1 to 6 Si-bonded hydrogen atoms per molecule,(B) a polymeric organosilicon compound having at least two alkenyl groups per molecule and a viscosity of not more than 100 mm.sup.2 /s,(C) a polymeric organosilicon compound having on average at least 10 Si-bonded hydrogen atoms per molecule,(D) a catalyst and, optionally(E) an inhibitor,with the proviso thatthe molar ratio of all the Si-bonded hydrogen atoms to all the SiC-bonded alkenyl groups in the composition is on average less than 1,the composition comprises (B) in an amount such that the composition comprises on average at least 1.1 alkenyl radicals of (B) per Si-bonded hydrogen atom of (A)and the content of Si-bonded hydrogen atoms of (C) is 5% to 50%, based on the number of all the Si-bonded hydrogen atoms present.

Abstract: A heat curable silicone elastomer composition includes (1) an organopolysiloxane having at least two aliphatic unsaturated hydrocarbon groups, (2) an organohydrogenpolysiloxane having at least two hydrogen atoms, and (3) a platinum-containing silicone resin having a melting or softening point of 49.degree. to 150.degree. C. and containing 0.05-0.3 mol % of SiOH group. The composition is storage stable at room temperature and efficiently cures through hydrosilylation reaction at high temperature.

Abstract: A rubber compound comprising (A) an organopolysiloxane having at least two alkenyl groups in a molecule and (B) reinforcing silica powder is blended with (C) silicone elastomer particles obtained by reacting an organohydrogenpolysiloxane with a vinyl group-containing organopolysiloxane such that the molar ratio of .tbd.SiH group to --CH.dbd.CH.sub.2 group ranges from 1.2 to 5 and (D) a platinum catalyst to form a silicone rubber composition which cures into a product having high rubber strength despite the inclusion of silicone elastomer particles. The composition finds typical use as silicone rubber parts in copying machines.

Abstract: A composition for a solvent resistant silicone gel which comprises (A) 100 weight parts of branched organopolysiloxane having vinyl groups which contains:______________________________________ (CF.sub.3 --CH.sub.2 --CH.sub.2)(CH.sub.3)SiO units 70.0-98.5 mol % RSiO.sub.1.5 units 0.5-10.0 mol %, and (CH.sub.2 .dbd.CH)(CH.sub.3).sub.2 SiO.sub.0.5 units 1.0-10.0 mol %, ______________________________________where R is a group selected from a 3,3,3-trifluoropropyl group, a phenyl group, a methyl group and a vinyl group, (B) 0.1 to 30 weight parts of organohydrogen polysiloxane having at least one hydrogen atom bound to a silicon atom within the molecule, and (C) an addition reaction catalyst. The composition can form a cured silicone gel product which possesses a superior solvent resistance towards, for example, gasoline, while maintaining flexibility at low temperature.

Abstract: There is disclosed a curable resin composition that has an excellent fluidity prior to curing and that cures to form a molding resin that is flexible, highly moisture resistant, and strongly resistant to heat shock, said composition comprising(A) 100 weight parts of a curable resin; and(B) 0.1 to 500 weight parts of an epoxy group-containing silicone resin that has the general formula(R.sup.1 SiO.sub.3/2).sub.a (R.sup.2 R.sup.3 SiO.sub.2/2).sub.b (SiO.sub.4/2).sub.cwherein R.sup.1, R.sup.2 and R.sup.3 each represents a group selected from the group consisting of an epoxy group-containing organic group and a monovalent hydrocarbon group with the proviso that said epoxy group-containing organic groups comprise 0.1 to 40 mole percent of the total silicon-bonded organic groups in said silicone resin (B), a is a positive number, b is zero or a positive number, c is zero or a positive number, b/a has a value of zero to 10, c/(a+b+c) has a value of zero to 0.

Abstract: Disclosed is a novel resin of the structure (HSiO.sub.1.5).sub.x (R.sub.1 R.sub.2 R.sub.3 SiO.sub.0.5).sub.y, wherein R.sub.1, R.sub.2, and R.sub.3 are independently selected from hydrogen, alkyls and aryls, x is 0.25 to 0.99, y is 0.01 to 0.75 and x+y=1.0. Also disclosed is a method for making these resins.

Abstract: The present invention relates to a peroxide-curable silicone rubber composition which, when cured, exhibits a reduced modulus and improved tear strength relative to prior art systems without sacrificing other desirable properties, such as high tensile strength of the cured rubber or storage stability of the uncured rubber base, said composition comprising:(A) 100 parts by weight of a diorganopolysiloxane gum;(B) 10 to 75 parts by weight a reinforcing filler;(C) a polybutylene oligomer having a number average molecular weight of 200 to less than 900 and having functionality selected from the group consisting of epoxy, alkoxyphenylene, hydroxyl, carboxyl, anhydride and fully saturated; and, optionally,(D) a hydroxy-terminated diorganopolysiloxane having a degree of polymerization of 2 to 50.

Abstract: An MQ resin is functionalized by heating with a functionalized organosilicon material such as a disiloxane or halosilane in the presence of a linear phosphonitrilic halide, a short chain linear phosphazene or a strong acid such as trifluoromethanesulfonic acid.

Abstract: An organopolysiloxane composition contains (A) a both end hydroxyl-blocked diorganopoly-siloxane, (B) a hydroxyl-free diorganopoly-siloxane having a degree of polymerization equal to or greater than that of (A), (C) an organo-hydrogenpolysiloxane having at least three hydrogen atoms in a molecule, (D) an organosilane containing at least two alkoxy groups and an amino group attached to a silicon atom through an alkylene group in a molecule and/or a partial hydrolyzate thereof, (E) a fatty acid metal salt, (F) polycarbonate powder having a mean particle size of up to 50 .mu.m, and optionally (G) an organo-silane containing at least two alkoxy groups and a mercapto group attached to a silicon atom through an alkylene group in a molecule and/or a partial hydrolyzate thereof. It is applied to a rubber substrate to form a wear resistance coating thereon.

Abstract: A method for manufacturing, with high yield and without accompanying depolymerization, an organosilicon polymer with double-ended functionality which contains a bond between a silicon atom and a hydrogen atom or an alkenyl group at both ends of the molecular chain. The organosilicon polymer with double-ended functionality is expressed by the general formula:R.sup.3 R.sup.1.sub.2 SiO(R.sup.1.sub.2 SiO).sub.p R.sup.1.sub.2 Si {R.sup.4 R.sup.1.sub.2 SiO(R.sup.1.sub.2 SiO).sub.m SiR.sup.1 .sub.2 }.sub.n R.sup.3.wherein R.sup.1 is a C.sub.1-10 monovalent hydrocarbon group that does not contain an aliphatic unsaturated bond, R.sup.2 is a C.sub.2-10 alkenyl group, R.sup.3 in the same molecule is either only a hydrogen atom or only a C.sub.2-10 alkenyl group, R.sup.4 is a C.sub.2-10 alkylene group, m is an integer equal to or greater than 0, n is a positive integer and p is an integer equal to or greater than 0. This method is an addition polymerization of a diorganosiloxane expressed by the general formulaR.sup.3 R.

Abstract: A curable organopolysiloxane composition which cures freely, uninhibited by moisture or heat, and the cured silicone substance formed has excellent adhesive strength to various substrates when cured in contact with them. The curable organopolysiloxane composition 100 parts by weight of an organopolysiloxane mixture of an alkoxy-organopolysiloxane with a viscosity at 25.degree. C. of 0.02-1,000 Pa.s and at least two silicon-bonded alkoxy groups in each molecule and an alkenyl-organopoly-siloxane with a viscosity at 25.degree. C. of 0.02-1,000 Pa.s and at least two silicon-bonded lower alkenyl groups in each molecule; an organohydrogenpolysiloxane having at least two silicon-bonded hydrogen atoms in each molecule and in an amount such that there are 0.3-5 mols silicon-bonded hydrogen atom per one mol of the silicon-bonded lower alkenyl groups in the composition; 0.1-20 parts by weight of an alkoxysilane represented by the following formula or its partial hydrolysis condensateR.sup.1.sub.a Si(OR.sup.2).sub.