Abstract: Novel processes for preparing hydridosiloxane and organohydridosiloxane resins are disclosed. The processes of the invention broadly provide for the steps of contacting a silane monomer with a solid state catalyst in the presence of a reaction mixture that includes a nonpolar, e.g., hydrocarbon, solvent, and a polar solvent, e.g., alcohol and water. The process is conducted under conditions effective to catalytically convert said silane monomer into hydridosiloxanes and organohydridosiloxanes. Recovery of the products is advantageously aided by the ease of separating the solid state catalyst from the reaction mixture. Hydridosiloxanes and organohydridosiloxanes resins produced by the processes of the invention are also provided.

Abstract: Aqueous silicone dispersions crosslinkable into elastomeric state by elimination of water therefrom, well adapted for the production of elastomer seals, e.g., for the building industry, include:(A) 100 parts by weight of an oil-in-water emulsion of an .alpha.,.omega.-(dihydroxy)polydiorganosiloxane stabilized with at least one anionic or nonionic surface-active agent, or mixture thereof;(B) 1 to 100 parts by weight of an hydroxylated silicone resin containing, per molecule, at least two different recurring structural units selected from among those of the formulae: R.sub.3 SiO.sub.0.5, R.sub.2 SiO, RSiO.sub.1.5 and SiO.sub.2, wherein the radicals R, which may be identical or different, are vinyl, phenyl or 3,3,3-trifluoropropyl radicals, or linear or branched chain alkyl radicals containing from 1 to 6 carbon atoms, said resin having a hydroxyl group weight content of from 0.1% to 10%;(C) 0 to 250 parts by weight of a nonsiliceous inorganic filler;(D) 0.

Abstract: A reaction of perfluoroolefins with bis(silyl) ethers to produce novel partially fluorinated and perfluorinated copolymers and macrocyclic compounds is disclosed.

Abstract: The invention provides a method for coating an article with a siloxane-based coating composition that results in a coating with high thermal mechanical stability, the method also allowing commercially acceptable speeds to be employed while inhibiting beading of the coating prior to cure. In one embodiment, an article is coated with a composition containing a first methylsilsequioxane oligomer having an initial viscosity of about 2000 cp or less, a second methylsilsequioxane oligomer having an initial viscosity of about 40,000 to about 90,000 cp, a viscosity-lowering additive of a lower aliphatic ketone, and a catalyst. In another embodiment, the invention provides a method for coating an article with a modified methylsilsequioxane coating suitable for higher temperature applications than an all-methyl coating.

Abstract: The invention relates to a substance mixture for a material for a cofferdam, to the material, and to the use and preparation thereof.

Abstract: A method for manufacturing a siloxane compound described by formula R.sup.1.sub.m Si{OSi(CH.sub.3).sub.2 H}.sub.(4-m) comprising reacting a silane compound or condensation product of a silane compound described by formula R.sup.1.sub.m Si(OR.sup.2).sub.(4-m), where R.sup.1 is selected from the group consisting of hydrogen and substituted or unsubstituted monovalent hydrocarbon groups, R.sup.2 is hydrogen, alkyl groups and alkoxyalkyl groups, and m is an integer from 0 to 3, with 1,1,3,3-tetramethyldisiloxane in an aqueous solution of an acid in which the acid concentration is 1.0 wt % or less, and the molar ratio of the aqueous solution to the 1,1,3,3-tetramethyldisiloxane is in the range of 0.5 to 1.5. The method is particularly useful for manufacturing siloxane compounds having dimethylhydrodosiloxy groups.

Abstract: An alkoxysilane compound represented by the formula (I) ##STR1## wherein R.sup.1, and R.sup.2 denote --CH.sub.3 or --C.sub.2 H.sub.5 and X denotes --COO.sup.- or --SO.sub.3.sup.-, p and n denote an integer of 1 to 3 and q denotes 0 or 1, where p+q=3, a surface processing solution containing the alkoxysilane compound or its acid-processed reaction product and a contact lens surface-processed with the surface processing solution. The alkoxysilane compound is capable of affording hydrophilicity to the surfaces of various substrates and may be utilized in the field of fibers, optical components, medical materials or in inspection and diagnostic drugs, particularly as a surface bound coating composition for contact lenses.

Abstract: A catalyst/cross-linking agent composition, containing at least onea) vinyltrialkoxysilane as cross-linking agent,b) dialkyltin oxide as catalyst,c) optional organic acid for the control of the reaction time,d) optional inert solvent, ande) optional dye or colored pigment,is especially useful for condensation/cross-linking of polysiloxanes, such as OH-endstopped polydimethylsiloxane, in making moldings. Especially useful for impression taking in the dental field.

Abstract: The invention relates to a process for preparing polyorganosiloxanes which comprise substantially no cyclic components and have uniform molecular weight distribution by reacting organosilicon compounds which have no condensable groups in the presence of a catalyst which exclusively promotes equilibration and suppresses formation of cyclic components. The resulting polyorganosiloxanes have a linear or branched structure. They can either be used immediately, for example in silicone rubbers and silicone greases, as components in release agents, in impregnating agents, in antifoams, etc., or are starting compounds for preparing organofunctionally modified polysiloxanes which are obtained by hydrosilylation of the polyorganosiloxanes with hydrocarbons and/or organic polymers.

Abstract: Compositions of unstrained perfluorinated organo substituted cyclosiloxanes of formula (I): ##STR1## wherein m is an integer of 1 to 12; n is an integer of 1 to 4; X is a divalent radical which may include O, NH, N(CH.sub.3), OC(O), NHC(O), N(CH.sub.3)C(O)CH.sub.2 ; and R.sup.F is a perfluorinated straight chain or branched chain monovalent alkyl radical of 1 to 25 carbon atoms; or R.sup.F is a perfluorinated ether radical of the general formula (II): ##STR2## wherein p is an integer of 1 to 10 are described, along with copolymer compositions prepared from these cyclopolysiloxanes and from mixtures of these cyclosiloxanes and other siloxanes.

Abstract: In the chain extension of a low molecular weight .alpha.,.omega.-dihydroxypoly(diorganosiloxane) wherein the siloxane is contacted with a chain extension catalyst, the improvement wherein said catalyst comprises at least one phosphoric acid ester, orthophosphoric acid, or a salt thereof. The reaction proceeds rapidly and, when complete, the catalyst can easily be deactivated to prevent degradation and/or rearrangement.

Abstract: A liquid silicone rubber base including (A) an alkenyl-containing organopolysiloxane, (B) a reinforcing silica filler, (C) a mixing assistant in the form of a silanol-containing compound, (E) an organohydrogen polysiloxane, (f) a platinum catalyst and optionally, (D) a wetting auxiliary catalyst is prepared by previously mixing 10-120 parts of component (A) with 1-35 parts of component (C) and 0-35 parts of component (D) to form a premix liquid, mixing the premix liquid with 100 parts of component (B) to form a premix power, and kneading the premix powder with the remainder of component (A). By adding a curing agent of organohydrogenpolysiloxane/platinum catalyst to the liquid silicone rubber base, there is obtained a liquid silicone rubber composition having improved fatigue endurance.

Abstract: A process for the acid-catalyzed synthesis of polysiloxane emulsions is discussed. The process utilizes pre-existing polysiloxane emulsion seeds to yield polysiloxane emulsions comprising optionally multi-layered mono-modal particles.

Abstract: A cross-linkable polymer composition contains a cross-linkable polymer with hydrolysable silane groups and at least one silanol condensation catalyst. The polymer composition is distinguished by the silanol condensation catalyst being a tinorganic compound of formula (I); RSn(OH).sub.k X.sub.1 OSn(OH).sub.m X.sub.n R', wherein R and R' are hydrocarbon radicals, R' being the same as or different from R, X is a halogen, h is 1 or 2, j is 1 or 2, h+j=3, k, l, m and n are 1 or 2, k+1=2, m+n=2 and at least one of 1 and n is different from 0. Preferably, the composition contains 0.0001-3% by weight of the silanol condensation catalyst.

Abstract: A process for the ring-opening polymerisation of cyclosiloxanes, which comprises contacting a cyclosiloxane with 1-500 ppm by weight of a phosphazene base, based on the weight of cyclosiloxane, in the presence of water, preferably 0.5-10 mols per mol of phospazene base. Also claimed is a process in which the cyclosiloxane is present together with an agent which inhibits catalyst activity of the phosphazene base, e.g. carbon dioxide or water, in which the polymerisation is initiated by reducing the effect of the inhibiting agent e.g. by heating.

Abstract: A novel resin composition for use in applications requiring low formaldehyde concentration levels. The novel composition comprising a stabilized polyacetal polymer with capped end groups is characterized by the concentration of formaldehyde generated from a formed object of the said composition in a closed environment being less than 20 ppm.

Abstract: The present invention relates to radiation curable silicone vinyl ethers and methods for preparing silicone vinyl ethers. More particularly, the present invention relates compositions containing vinyl ether functional silicones and to the preparation and use of silicone vinyl ethers which are curable by addition of photocleavable acids and exposure to ultraviolet or electron beam radiation.

Abstract: An aromatic polycarbodiimide containing a siloxane bond in the polymer main chain thereof.The polycarbodiimide can adhere at a low temperature in a short time and has a high heat resistance. The polycarbodiimide has a good adhesive property to an adherend such as semiconductor elements, has a low hygroscopic property and is excellent in the storage stability. Therefore, the polycarbodiimide can be stored for a long period of time at normal temperature.

Abstract: The present invention relates to a series of novel silicone phosphate esters which mitigate eye and skin irritation when used in synergistic combinations with fatty alcohol sulfates and fatty alcohol ether sulfates. These materials form complexes which have surprisingly low irritation properties.

Abstract: Method of making polysiloxanes by ring opening polymerization of dimethylcyclosiloxanes such as hexamethylcyclotrisiloxane (D.sub.3), and cyclosiloxanes such as 1,3,5-trimethyl-1,3,5-tris(3',3',3'-trifluoropropyl) cyclotrisiloxane (F.sub.3) or 1,3,5,7-tetramethyl-1,3,5,7-tetrakis(3',3',3'-trifluoropropyl) cyclotetras iloxane (F.sub.4) in an acid-free system using electrophillic initiators. The reaction mixture is formed under anhydrous conditions and contains (i) the cyclosiloxanes, (ii) a Lewis base such as 2,6-di-tert-butylpyridine which serves as a co-catalyst and an acid scavenger, and optionally (iii) a salt of a strong acid such as tetrabutylammonium trifluoromethane sulfonate. The anhydrous mixture is contacted with a silyl ester of a strong acid such as triflic acid. The anhydrous reaction mixture is agitated at room temperature until a polysiloxane is formed.

Abstract: There is disclosed a method of making polysilanes by polymerization of a silane in the presence of a catalyst comprising a phosphine-stabilized polyhydride of an early transition metal of Groups 4 to 7 of the Periodic Table and the resultant polysilanes which have a molecular weight higher than 1,000 and a polydispersity below about 2.

Abstract: A method for the preparation of hydrophobic silica gels which are useful as reinforcing fillers in rubber compositions. The method comprises two steps, where in the first step a silica hydrosol is contacted with a sufficient concentration of a strong mineral acid at a pH less than about pH 1 to form a silica hydrogel. In the second step the silica hydrogel is contacted with described organosilicon compounds in the presence of a catalytic amount of a strong acid to effect hydrophobing of the silica hydrogel thereby forming a hydrophobic silica gel having a surface area within a range of about 100 m.sup.2 /g to 750 m.sup.2 /g as measured in the dry state. In a preferred method the hydrophobic silica hydrogel is contacted with a sufficient quantity of a water-immiscible organic solvent to convert the hydrophobic silica hydrogel into a hydrophobic silica organogel.

Abstract: The present invention provides a process for the production of poly(diorganosiloxane)/polycarbonate block copolymers in a melt using specific transesterification catalysts.

Abstract: The present invention relates to a silicone composition prepared by reacting a mixture of (i) a polyisobutylene compound, (ii) a polyorganosiloxane, (iii) a silicon compound, and (iv) a catalytic amount of a catalyst. The compositions of this invention are resistant to phase separation and are useful as foam control compositions in foam producing systems.

Abstract: The invention relates to a catalyst for preparing organosiloxanes and polyorganosiloxanes which are obtained primarily by polycondensation processes. The catalyst of the invention is a reaction product of phosphonitrilic chloride with a compound of the general formula ?R.sub.3 SiO(R.sub.2 SiO).sub.m !.sub.3 P.dbd.O (I), where R are, independently of one another, identical or different, unsaturated and/or saturated monovalent hydrocarbon radicals having from 1 to 6 carbon atoms or hydrogen, with the proviso that only one hydrogen atom is bound to each silicon atom and m has a value between 0 and 1000. Volatile chlorine-containing silicon compounds formed during the reaction can, if required, be completely or partially removed.

Abstract: A composition (comprising) an M-rich silicone and a catalyst is useful for de-polymerizing polymerized silicones thereby facilitating the recycle of electrical devices by enabling the removal of silicone coatings thereon.

Abstract: A photocurable composition comrpising: (a) a photopolymerizable silane or siloxane containing epoxycylohexyl group(s), (b) a photoinitiator, and (c) a photosensitizer, wherein the photosensitizer comprises at least one material selected from the group consisting of sulfolene, sulfolene derivatives, isatin and isatin derivatives.

Abstract: Polysiloxanes having pendant and/or telechelic carbonyl functionality, i.e., aldehyde functionality .tbd.Si--R--CH.dbd.O or ketone functionality .tbd.Si--R--CR.dbd.O, are manufactured in high yield by ozonolysis of polydiorganosiloxanes containing alkenyl groups, followed by treatment with a reducing agent such as zinc and acetic acid. The process is relatively fast and economical using readily available starting materials such as hexenyl-functional polymers. In particular, aldehyde functionality on the polymer can be used as a polymeric crosslinking agent.

Abstract: In the production of a poly(diorganosiloxane) with diorganyloxyorganylsilyl or triorganyloxysilyl end groups wherein at least one .alpha.,.omega.-dihydroxypoly(diorganosiloxane) is reacted with at least one alkoxysilane in the presence of a catalyst, the improvement which comprises employing as the catalyst at least one phosphoric acid ester or salt thereof. The reaction proceeds rapidly and, when complete, the catalyst can easily be deactivated to prevent degradation and/or rearrangement.

Abstract: A process for the synthesis of polysiloxane emulsions is discussed. The process yields mono modal polysiloxane emulsions, providing control over the particle size and dispersity.

Abstract: A method for stabilizing a mixture comprising a polydiorganosiloxane and an alkali metal. The method comprises contacting a polydiorganosiloxane and an alkali metal with a siloxy phosphonate described by formula ##STR1## where each R.sup.1, R.sup.2, and R.sup.3 is an independently selected hydrocarbon comprising one to about 12 carbon atoms, n=0 or 1, and x, y, and z are integers, where x=1 to 1000, y=0 to 1000, and z=0 to 1000.

Abstract: The present invention is hydrophobic silica gels and a method for their preparation under neutral conditions. The method comprises two steps, where in the first step the pH of a silica hydrosol is adjusted with a base to within a range of about pH 3 to pH 7 to facilitate formation of a silica hydrogel. In the second step the silica hydrogel is contacted with an organosilicon compound in the presence of a catalytic amount of a strong acid to effect hydrophobing of the silica hydrogel. In a preferred method, in a third step the hydrophobic silica gel is contacted with a sufficient quantity of a water-immiscible organic solvent to convert the hydrophobic silica hydrogel into a hydrophobic silica organogel.

Abstract: The present invention relates to initiators for the polymerization and/or crosslinking, cationically and under photochemical and/or thermal activation and/or activation by a beam of electrons, of monomers and/or polymers containing organofunctional groups.The said initiators are of the type comprising an onium salt of an element from groups 15 to 17 of the Periodic Table (Chem & Eng News, Vol 63, N5, 26, of 4 Feb. 1985) and they are characterized in that they contain at least one polymerization and/or crosslinking accelerator chosen from .alpha.-hydroxylated carboxylic acid esters such as, for example, lactic acid esters. Another subject of the invention is compositions based on at least one cationically crosslinkable polyorganosiloxane and on at least one initiator.

Abstract: A sequential catalysis of the ring opening polymerization of cyclic organosiloxanes using a base catalyst that can be neutralized by a subsequent redistribution and condensation catalyst such as a Lewis acid catalyst, preferably a phosphonitrilic compound, permits the rapid synthesis of functionalized and poly-functionalized silicone copolymers such as alkenyl hydride copolymers, a new composition of matter.

Abstract: Method of making polysiloxanes by ring opening polymerization of 1,3,5-trimethyl-1,3,5-tris(3',3',3'-trifluoropropyl) cyclotrisiloxane (F.sub.3) or 1,3,5,7-tetramethyl-1,3,5,7-tetrakis(3',3',3'-trifluoropropyl) cyclotetras iloxane (F.sub.4) in an acid-free system using electrophillic initiators. The reaction mixture is formed under anhydrous conditions and contains (i) either F.sub.3 or F.sub.4, (ii) a Lewis base such as 2,6-di-tert-butylpyridine which serves as an acid scavenger, and optionally (iii) a salt of a strong acid such as tetrabutylammonium trifluoromethane sulfonate. The anhydrous mixture is contacted with a silyl ester of a strong acid such as triflic acid. The anhydrous reaction mixture is agitated at room temperature until a polysiloxane is formed.

Abstract: This invention pertains to an addition-curable silicone adhesive composition that is extrudable and flowable at room temperature in the absence of a solvent comprising (A) 40 to 95 parts of an alkenyl functional siloxane resin consisting essentially of R.sub.3 SiO.sub.1/2 siloxane units and SiO.sub.4/2 siloxane units, wherein R is a monovalent hydrocarbon radical having 1 to 6 carbon atoms; there being from 0.5 to 1.5 R.sub.3 SiO.sub.1/2 units for every SiO.sub.4/2 units; said resin containing 0.01 to 22 wt % alkenyl functionality; (B) 0.5 to 10 parts of an SiH containing polyorganosiloxane having an average of at least 2 silicon-bonded hydrogen atoms per molecule and having a viscosity of 0.8 to 2,000 mm.sup.2 /s; (C) a hydrosilylation catalyst in sufficient quantity to promote curing of said composition; (D) optionally, up to 70 parts of a polydiorganosiloxane having at least two ethylenically or acetylenically unsaturated groups per molecule and having a viscosity of 100 to 80,000 mm.sup.

Abstract: The present invention provides crosslinkable compositions comprising(A) an organosilicon compound having radicals containing aliphatic carbon-carbon multiple bonds,(B) an organosilicon compound having Si-bonded hydrogen atoms,(C) a catalyst which promotes the addition of Si-bonded hydrogen onto aliphatic multiple bond, and optionally(D) an agent which retards the addition of Si-bonded hydrogen onto aliphatic multiple bond at room temperatureand to the use of the crosslinkable compositions for producing coatings which repel tacky substances.The present invention also relates to organosilicon compounds having Si-bonded hydrogen atoms, and to a process for their preparation.

Abstract: Organopolysiloxane oils and gums are produced by the condensation of silanol-terminated organosiloxane in the presence of an effective amount of a peralkylated phosphazene base as a catalyst and at reduced pressure.

Abstract: Liquid polysiloxanes are used in defoamant preparations, as diffusion-resistant plasticizer oils, separation agents, or impregnation agents. The liquid polysiloxanes are obtained by reacting:(1) 100 parts by weight of the hydrolysis product of dimethyldichlorosilane having a viscosity of less than 200 mm.sup.2 /sec at 25.degree. C.;(2) 1-100 parts by weight of a polydiorganosiloxane having a viscosity of less than 200 mm.sup.2 /sec at 25.degree. C., of formula (I)R.sup.3.sub.c SiO.sub.(4-c)/2, (I)where each R.sup.3 is independently a substituted or unsubstituted hydrocarbon group with 1-30 carbon atoms, and c has mean value 1.9-3.0; and(3) 0.1-20 parts by weight of one or more compounds (a)-(d),where (a) is a silicon compound of formula (II)R.sup.4.sub.d SiX.sub.(4-d), (II)where R.sup.

Abstract: A coating composition having excellent antifogging property, good abrasion resistance, improved adhesion to the substrate and good water resistance, which comprises an epoxy functional organosilane or the hydrolysate or condensate thereof; an amino functional organosilane or the hydrolysate or condensate thereof; a hydrophilic (meth)acrylate monomer, or a copolymer of two components selected from the hydrophilic (meth)acrylate monomer, another hydrophilic monomer and an organosilane and/or a terpolymer of the three components; a curing catalyst; and, optionally, a multi-functional (meth)acrylate monomer having at least two (meth)acryl groups and a radical polymerization initiator.

Abstract: A process for the preparation of organopolysiloxanes which contain at least one unit of the formula(R.sup.1 O).sub.3-m R.sub.m SiO.sub.1/2 (I)in whichR is identical or different and is a hydrogen atom or monovalent, optionally substituted hydrocarbon radical,R.sup.1 is identical or different and is a monovalent, optionally substituted hydrocarbon radical having 1 to 8 carbon atoms andm is 0, 1 or 2,which comprises, in a 1st step, reacting organosilicon compounds (1) which contain at least one Si-bonded hydroxyl group with at least one silane (2) of the formula(R.sup.1 O).sub.4-m SiR.sub.m (II)and/or partial hydrolysates thereof, in which R, R.sup.1 and m have the above mentioned meaning, in the presence of a fluoride salt (3), and, optionally, in a 2nd step, when the reaction has ended, adding component (4) which can bond fluoride ions.

Abstract: A batch or continuous process for the production of low molecular weight hydrogen siloxanes catalyzed by soluble phosphonitrilic halides or solid acid catalysts such as acid washed clays, zeolites and ion exchange resins.

Abstract: A coating composition comprising:a hydrolyzed or partially hydrolyzed alkoxysilane,a solvent,and an arylcyclobutene;is useful in a variety of applications, including coatings for multichip modules, flat panel displays and integrated circuits. The preferred alkoxysilanes correspond to the formula: ##STR1## wherein R is C.sub.1 -C.sub.6 alkylidene, C.sub.1 -C.sub.6 alkylene, arylene, or a direct bond; Y is C.sub.1 -C.sub.6 alkyl, C.sub.2 -C.sub.6 alkenyl, aryl, 3-methacryloxy, 3-acryloxy, 3-aminoethylamino, or 3-amino; R' is independently in each occurrence C.sub.1 -C.sub.6 alkyl; and Z is C.sub.1 -C.sub.6 alkyl, C.sub.2 -C.sub.6 alkenyl or OR'.

Abstract: Novel methods for the preparation of polymers useful as precursors to ceramic materials by catalytic activation of Si--H bonds are disclosed. The methods comprise reacting, in the presence of a catalyst effective to activate Si--H bonds, Si--N bonds, or both, and/or a reactive solvent, a polymer in the form of a polysilane, polysilazane, polysiloxane or polycarbosilane with a reactant having the structural formula R--X--H, wherein X is NR' or O, R is H, organic, silyl, siloxyl, silazanyl or carbosilyl and may contain at least one additional X--H group, and R' is H, amino, silyl or silazanyl, to produce a modified polymer containing at least one Si--X bond. Polymers produced by these methods are also disclosed.

Abstract: The present invention relates to radiation curable silicone vinyl ethers and methods for preparing silicone vinyl ethers. More particularly, the present invention relates compositions containing vinyl ether functional silicones and to the preparation and use of silicone vinyl ethers which are curable by addition of photocleavable acids and exposure to ultraviolet or electron beam radiation.

Abstract: The present invention relates to compositions comprising vinyl ether functional siloxanes and aromatic iodonium salt or aromatic sulfonium salt photoinitiators which cure upon exposure to ultraviolet or electron beam radiation. The present invention further relates to use of these compositions in pressure sensitive release applications.

Abstract: The invention relates to a process for stabilizing organopolysiloxanes which contain phosphazenes and/or their reaction products which promote the condensation and/or equilibration of organopolysiloxanes. To stabilize any previously known organopolysiloxanes which contain phosphazenes and/or their reaction products against re-arrangements and also molecular weight changes and viscosity changes resulting therefrom, it is proposed that the said phosphorus compounds be brought into contact with at least one non-basic, solid adsorbent.

Abstract: The present invention provides a sealing component for connector waterproofing having an excellent heat resistance, low-temperature resistance and oil resistance which can be economically produced in a reduced molding time. A novel sealing component for connector waterproofing is provided, which comprises a vulcanized composition comprising at least (a) 100 parts by weight of an organopolysiloxane represented by the following average composition formula (I) containing at least two alkenyl groups per molecule and having a viscosity of at least 100,000 cs, (b) from 0.1 to 20 parts by weight of an organohydrogenpolysiloxane represented by the following average composition formula (II) containing at least two hydrogen atoms directly bonded to silicon atom per molecule, (c) from 5 to 500 parts by weight of a finely divided silica filler, (d) the catalytic amount of a platinum catalyst, (e) from 0.005 to 5 parts by weight of a sulfide compound represented by the following general formula (III), and (f) from 0.

Abstract: Use of a certain class of acid washed clays enables a fixed bed process for the production of very low viscosity low silanol content silicone fluids to be produced in a fixed bed single reactor process.

Abstract: A liquid silicone rubber composition contains (A) an organopolysiloxane having at least two alkenyl groups, (B) a reinforcing silica filler, (C) a condensation catalyst, (D) a silanol group-containing siloxane wetter, (E) an organohydrogenpolysiloxane having at least two hydrogen atoms, and (F) a platinum catalyst. Components (C) and (D) assist in blending a large amount of the silica filler in the composition. The composition is smoothly flowing, quickly curable and suitable for injection molding.