Abstract: In a preferred embodiment this invention provides novel organopolysiloxanes which exhibit nonlinear optical response.Illustrative of an invention organopolysiloxane is a polymer corresponding to the formula: ##STR1## where n is an integer of at least 5.

Abstract: The storage stability of catalyst compositions comprising a platinum-alkenylsiloxane complex, an organopolysiloxane, and a microparticulate hydrophilic silica is substantially increased when the pK.sub.a of a dispersion containing specified amounts of said complex and said silica in a non-polar solvent is at least 2.0. The silica is treated with an alkaline material to achieve said pH.sub.a value.

Abstract: The present invention is directed to a method for crosslinking reactive polyolefins using a rhodium catalyzed hydrosilation reaction and novel siloxanes as crosslinkers.Also disclosed are novel siloxane compounds which are useful in the crosslinking of polyolefins and polyolefin compositions which have been crosslinked through use of the claimed process and siloxane crosslinkers.

Abstract: In a process for producing 5-vinylbicyclo[2.2.1]heptyltrichlorosilane by addition-reacting 5-vinylbicyclo[2.2.1]hepta-2-ene with trichlorosilane, a process for producing 5-vinylbicyclo[2.2.1]heptyltrichlorosilane characterized in that a palladium metal or palladium complex is used as a catalyst.

Abstract: Certain liquid polydiorganosiloxanes wherein each molecule contains at least one sequence of 2 or more vinyl radicals bonded to non-terminal silicon atoms extend the working time at 25.degree. C. of organosiloxane compositions that cure by a platinum catalyzed hydrosilation reaction without adversely affecting the cure rate of the composition at temperatures of about 100.degree. C. and above. The polydiorganosiloxane is prepared by the acid-catalyzed polymerization of the corresponding cyclic polydiorganosiloxanes in the presence of a chain-terminating organosilicon reactant.

Abstract: The method of this invention produces an elastomeric silicone sealant having an improved shelf life. The sealant comprises an alkoxysilethylene ended polydiorganosiloxane polymer, an alkoxytrialkoxysilane crosslinker, and a titanium catalyst.

Abstract: A curable mixture for preparing soft silicone elastomers having low exudation properties comprises:(a) 100 parts by weight of a vinyl-containing base polymer of the formula ##STR1## in which R and R' are alkyl having 1 to 8 carbon atoms, aryl having 3 to 8 carbon atoms, vinyl having 3 to 8 carbon atoms, and fluoroalkyl having 3 to 8 carbon atoms, with the proviso that said base polymer contains a statistical average of 0.5 to 1.8 vinyl groups per molecule, andx is a sufficiently large number that the viscosity of the polymer is between 0.1 and 300,000 Pascal-seconds at 20.degree. C.,(b) 0.1 to 50 parts by weight of an organohydrogensiloxane of the formula ##STR2## wherein R" is an alkyl having 1 to 8 carbon atoms, aryl having 3 to 8 carbon atoms or fluoralkyl having 3 to 8 carbon atoms,m is at least 3, and the sum of n and m is a sufficiently large number that said siloxane has a viscosity of 0.005 to 0.1 Pascal-seconds at 25.degree. C.

Abstract: A process for purifying alkylhalosilanes to reduce the content of olefinic impurities is described. The process comprises (A) contacting crude alkylhalosilanes, containing as a minor portion the olefinic impurities, with a hydrogen-containing halosilane and a soluble compound of a Group VIII metal; (B) facilitating reaction of the olefins with the hydrogen-containing silicon compound in contact with the Group VIII metal compound to form linear or branched silalkanes, said silalkanes having the formula,R.sup.ii.sub.m A.sub.n SiX.sub.p ; and(C) separating the alkylhalosilanes from the silalkanes formed in the reaction in (B).

Abstract: A process having the characteristic that a silicon compound having at least one hydrogen atom directly bonded to silicon in each molecule is addition reacted with an organic compound having at least one aliphatic double bond in each molecule in the presence of a platinum catalyst and an amide compound with the formula, RCONR.sup.1 R.sup.2. The presence of the amide maximizes the yield of the desired beta-adduct and minimizes the yield of the alpha-adduct.

Abstract: A method of forming preceramic polymers by mixing (A) an organic polysilane, preferably either a methylpolysilane of the formula [(RSiH).sub.x (RSi).sub.y ].sub.n, (where R is a lower alkyl group having from 1 to about 6 carbon atoms, a cycloalkyl group having from 3 to about 6 carbon atoms, a substituted or unsubstituted lower aryl group having from 6 to about 10 carbon atoms, a tri(lower)alkyl- or di(lower)alkylsilyl group x+y=1, (x and y are each >0 and also x=1, y=0), and n is an integer greater than 1) or a polycarbosilane having repeat units of the formula [R.sup.a Si(H)--(CH.sub.2).sub.q ], [R.sup.a Si(H)--CH.dbd.CH], and [R.sup.a Si(H)--C.tbd.C] (where R.sup.

Abstract: This invention relates to an improved process for preparing, purifying and/or storing methacryloxy or acryloxy containing organosilicon compounds without the undesirable polymerization normally associated with the methacrylate bonds. In an alternative embodiment, the process is even further improved with the addition of certain stabilizers, and in particular diketone or ketoester stabilizers.

Abstract: Compounds of the formula Ia ##STR1## in which X and R.sup.1 to R.sup.6 are as defined in the claims, are obtainable by reacting monochlorosilanes of the formula II ##STR2## with tetrasubstituted ethylenes of the formula III ##STR3## X as Cl and Br can be replaced by ester groups of inorganic and organic acids. The compounds of the formula I and those with other ester groups are suitable especially as a protective-group reagent for hydroxyl, mercapto, carboxyl, amino and amide groups.

Abstract: Organopolysiloxane compounds containing at least one silicon-bonded, epoxy-terminated polyoxyalkylene group are useful for treating materials to provide hydrophilicity for the materials.

Abstract: A colloidal hydrosilylation catalyst is provided by effecting reaction between a silicon hydride or a siloxane hydride and a Pt(O) or Pt(II) catalyst. The colloidal catalyst forms stable mixtures with olefinically unsaturated organopolysiloxanes.

Abstract: A novel 2-substituted-1,3-butadiene compound which may be used as a coupling agent is disclosed, i.e. a 2-substituted-1,3-butadiene compound of the general formula (I) ##STR1## in which R.sup.1, R.sup.2 and R.sup.3 independently represent a halogen, a lower alkyl group, or a lower alkoxy group with the exception of those compounds wherein R.sup.1, R.sup.2 and R.sup.3 are all lower alkyl groups.

Abstract: Silane and monoalkylsilanes can be alkylated using an alkali metal aluminate, MAlR.sub.4, wherein M is Li, Na, or K and each R is a straight chain, alkyl radical solely composed of carbon and hydrogen containing from about 4 to about 18 carbon atoms. The aluminate can be used as a reactant, optionally in the presence of a straight chain alpha-olefin corresponding to the alkyl group in the aluminate. Alternatively, the aluminate can be used as a catalyst for the reaction of the olefin and the silane reactant, in which case from about 5 to about 10 mole percent of the aluminate (based on the silane reactant) is employed. The catalytic reaction is promoted by a smaller amount of a lithium salt such as lithium chloride. Both embodiments are conducted at somewhat elevated temperatures, approximately 160.degree.-210.degree. C., and at autogenous pressures, using reaction times of 8-20 hours.The products are useful as functional fluids or as intermediates.

Abstract: A process for the preparation of halopropyltrialkoxysilanes and halopropylalkylalkoxysilanes comprising the hydrosilation of allyl halides (including substituted allyl halides) with trialkoxysilanes and alkylalkoxy silanes over specific iridium-containing catalysts.

Abstract: A process for making an organosilicon compound containing an amino group, which comprises reacting an allylamine with the hydrosilyl group of a silicon compound represented by the formula:H(R.sup.1).sub.n Si(OR.sup.2).sub.3-nwherein R.sup.1 represents monovalent groups which may be identical of different and are selected from the group consisting of substituted or unsubstituted hydrocarbon groups, di- or trimethylsilyl groups and mono- or polyorganosiloxanyl groups; R.sup.2 represents an alkoxy-substituted or unsubstituted alkyl group; and n represents an integer of 0 to 3,in the presence of a complex of platinum with an olefin or its derivative, said reaction being carried out further in the presence of an amino compound represented by the formula:N(R.sup.3).sub.3 or HNQwherein R.sup.

Abstract: New organosilicon compounds of the formula ##STR1## R represents a hydrogen radical with 1 to 6 carbon atoms, or a phenyl radical;R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are the same or different and represent hydrogen or methyl radicals;R.sup.5, R.sup.6, R.sup.7 and R.sup.8 are the same or different and represent hydrogen, fluorine or hydrocarbon radicals with 1 to 8 carbon atoms, or fluorinated hydrocarbon radicals, in which at least one R.sup.5, R.sup.6 R.sup.7 or R.sup.8 radicals must be a fluorine or a fluorinated hydrocarbon radical;Y is a hydrolyzable radical, hydroxyl radical or organosiloxanyl radical;A represents ##STR2## in which R.sup.9 may be the same or different and represents a hydrogen or a methyl radical; anda has a value of 0, 1, 2, or 3.

Abstract: A polysiloxane containing an ethylidene norbornyl group possesses a terminal group represented by the formula: ##STR1## wherein R.sup.1 stands for a monovalent hydrocarbon group, a hydroxyl group, an alkoxy group, or at least one of the hydrocarbon groups represented by Y, and each R.sup.2 stands for the same or different groups selected from the class consisting of hydrogen, monovalent hydrocarbon groups, and a group represented by R.sup.1 wherein R.sup.1 has the same meaning as defined above, and being substantially in the form of a straight chain, 0 to 100 mol %, providing that 100 mol % is excluded where neither of the R.sup.1 's in the terminal groups is a hydrocarbon group represented by Y of the component units being represented by the formula: ##STR2## wherein each R.sup.3 's stand for the same or different groups selected from the class consisting of hydrogen and monovalent hydrocarbon groups and 100 to 0 mol %, providing that 0 mol % is excluded where neither of the R.sup.

Abstract: Multifunctional organopolysiloxane resin systems are provided whose starting materials comprise a reactive vinyl containing silane, a disubstituted silane and a trisubstituted silane hydrolyzed together to form a resin system. The preferred material of the resin system has a viscosity of from 7 to 70 centistokes at 25.degree. C. The preferred material is in the form of a contact lens and also contains an ester and a hydrophilic agent.

Abstract: A method for the preparation of 3-chloropropyltrichlorosilane is carried out by conversion of trichlorosilane with allylchloride in the presence of a platinum containing polymeric organosiloxane-ammonium compound containing units represented by the structural formula: ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 represent a group of the formula:R.sup.5 --SiO.sub.3/2 (2)wherein R.sup.5 denotes an alkylene group and the free valences of the oxygen atoms are saturated by silicon atoms of further groups of the formula (2), optionally with incorporation of crosslinking agents, R.sup.4 has the same meaning as R.sup.1, R.sup.2 and R.sup.3 or hydrogen, alkyl, cycloalkyl or benzyl, Y.sup.x- represents PtX.sub.4.sup.2- or PtX.sub.6.sup.2- (X is Cl or Br) and can also be an inorganic 1 to 3 functional anion of a protonic acid which yields stable salts with amine bases or the hydroxy group, and x is a number from 1 to 3.

Abstract: A process for preparing vinyl-tri-t-oxysilanes by reacting a tri-t-alkoxysilane with an alkyne in the presence of a platinum hydrosilation catalyst at a reaction temperature greater than 150.degree. C. forms a vinyl-tri-t-alkoxysilane in high yields and of high quality.

Abstract: The invention provides a novel class of organosilicon compounds useful as a curing agent in a room temperature curable organopolysiloxane composition, which is represented by the general structural formulaR.sub.2 CH--CR.dbd.C(OR)--O--Si(R.sup.1).sub.3-m (O--CR.dbd.CH--R).sub.m,in which each R is a hydrogen atom or a substituted or unsubstituted monovalent hydrocarbon group independently from the others, R.sup.1, if any, is a substituted or unsubstituted monovalent hydrocarbon group and the suffix m is 2 or 3. The compound can readily be synthesized by the reaction of an .alpha.,.beta.-unsaturated ester compound represented by the general formulaR.sub.2 C.dbd.CR--CO--OR,and an alkenyloxy-containing silane compound represented by the general formulaHSi(R.sup.1).sub.3-m (O--CR.dbd.CH--R).sub.m,in which R.sup.1, R and m each have the meaning as defined above, in the presence of a rhodium compound as a catalyst.

Abstract: Polymeric complex compounds of molybdenum, tungsten, manganese, rhenium and of the metals of the sub-groups VIII and I of the Periodic Table of Elements, which complex compounds have a silica-type structure are disclosed. At least one amine ##STR1## is bonded coordinately to the central metal atom. The atomic ratio of metal to nitrogen is from 1:1 to 1:10.sup.6. The required charge compensation is effected by means of an anion. In (1), R.sup.1 and R.sup.2 represent a group ##STR2## and R.sup.4 is an alkylene grouping. The oxygen atoms are saturated by silicon atoms of further groups (2), if appropriate with incorporation of crosslinking agents. R.sup.3 may have the meaning of R.sup.1 and R.sup.2, or represents hydrogen, an alkyl group, a cycloalkyl group or the benzyl group. The polymers can contain several metals. The invention also relates to processes for their preparation, and uses in catalysis.

Abstract: Tetraalkylsilane compounds are produced by contacting an admixture comprising(A) at least one alkylsilane selected from the group consisting of(i) a monoalkylsilane having the formulaR--Si--H.sub.3,(ii) a dialkylsilane having the formulaR--SiH.sub.2 --R.sub.1,(iii) a trialkylsilane having the formulaR--SiH--(R.sub.1).sub.2,and mixtures thereof, wherein R and R.sub.1 each represent an alkyl radical of from one to 20 carbon atoms per molecule, and(B) at least one alpha olefin containing from two to about 20 carbon atoms per molecule, under an inert atmosphere with an oxygenated, platinum-containing catalyst in which the platinum catalyst is selected from the group consisting of (i) a platinum catalyst having a basicity substantially equal to or less than that provided by a platinum-containing catalyst having a triphenylphosphine ligand, or (ii) a heterogeneous platinum-containing catalyst, under hydrosilylation conditions.

Abstract: A low oiling gel filled article comprising a polydiorganosiloxane gel contained within a polysiloxane rubber envelope. The gel is characterized as being the addition product of a first prepolymer having silicon-bonded additional radicals on a terminal silicon atom, and a second prepolymer having silicon-bonded addition radicals on several intermediate silicon atoms. The polydiorganosiloxane prepolymers, and complex fluid, as well as processes for making same, are also disclosed herein.

Abstract: The present invention relates to a method of preparing 2-phenylethylchlorosilanes. Hydrogen chlorosilanes and styrene are used as starting products, and they are reacted together in the presence of benzothiazole. Benzothiazole is used at least in the same amount as the platinum catalyst. The preferred molar ratio of platinum catalyst to benzothiazole is between 1:2 and 1:50. The reaction can be performed with high yields of the 2-isomer, which is virtually free of the 1-isomer, at temperatures up to about 90.degree. C. At the same time, an excess pressure of up to 6 bar is easily tolerable without marked reduction of the yields of the desired product.

Abstract: A hydrosilation catalyst is provided having platinum atoms anchored onto a hydroxylated oxide of silicon or aluminum by Pt--S linkages through sulfur organo siloxy groups. A hydrosilation method and a method for making such platinum catalyst is also provided.

Abstract: A hydrosilation catalyst is provided having platinum atoms anchored onto a hydroxylated oxide of silicon or aluminum by Pt-S linkages through sulfur organo siloxy groups. A hydrosilation method and a method for making such platinum catalyst is also provided.

Abstract: [2-(p-t-Butylphenyl)ethyl]silanes are provided having the general formula:Si(B).sub.x (R).sub.y (A).sub.zwherein B is a (p-t-butylphenyl)ethyl moiety, R is an alkyl or aryl moiety and A is a hydrolyzeable moiety; x equals 1 or 2, y equals 0, 1 or 2 and z equals 1, 2 or 3 such that x plus y plus z equals 4. The bulky substituted silanes are produced by the hydrosilylation of p-t-butylstyrene.[2-(p-t-Butylphenyl)ethyl] substituted disiloxanes are also provided, having the general formula:(B).sub.x (R).sub.y (A).sub.z Si--O--Si(A).sub.z (R).sub.y (B).sub.xwherein B, R, A, x, y and z are as defined above except that z equals 0,1 or 2 and x plus y plus z equals 3. The bulky substituted disiloxanes are produced by the hydrolysis of above-described bulky substituted silanes.

Abstract: This invention relates to a process for preparing tetrafluoroethyloxyalkyl silanes by the addition of silanes containing Si-bonded hydrogen to tetrafluoroethyl-alkenylether in a tubular reactor in which the reaction mixture containing an excess of silanes is recycled at a rate of at least 10 meters per minute.

Abstract: Platinum-styrene complexes are prepared by reacting a platinum halide with styrene or substituted styrenes in the presence of a basic material for a sufficient amount of time to form a complex having more than one and less than four gram atoms of halogen per gram atom of platinum.These platinum-styrene complexes may be used to promote the addition of organosilicon compounds having at least one .tbd.SiH group per molecule to a compound containing aliphatic unsaturation.

Abstract: A method of hydrosilating non-aromatic carbon to carbon pi bonds comprising exposing a mixture of a compound having a said pi bond and a silane having silanic hydrogen to a platinum metal catalyst, and subjecting the mixture to ultrasonic energy while exposed to said catalyst.

Abstract: In a process for the addition of silanes or siloxanes having SiH groups to compounds with olefinic double bonds, the invention relates to the use of catalysts of the general formulaYX.sub.2 (NH.sub.3).sub.2in which Y is a platinum or palladium radical, andX is a chlorine, bromine or iodine radical or the NO.sub.2 group.The catalysts have a high selectivity. Side reactions and disproportionation reactions are avoided.

Abstract: There is provided a method for preparing .beta.-phenylethylchlorosilanes comprising forming a mixture of styrene, a chlorosilane having at least one silicon-bonded hydrogen atom, a platinum catalyst and a tertiary amine, and heating the mixture in order to effect addition of the chlorosilane to styrene.

Abstract: A method for improving the activity of a platinum catalyst in promoting the addition of Si-bonded hydrogen atoms to compounds containing aliphatic unsaturation which comprises reacting an ammonium platinum silicon complex with a compound containing aliphatic unsaturation in the presence of a basic compound.

Abstract: A method for producing mono-substituted dichlorosilanes selectively with a high yield from dichlorosilane is provided. According to this method, dichlorosilane and a specified compound having a double bond at .alpha.-position are reacted in the presence of a catalyst which is a homogeneous complex of ruthenium, rhodium, nickel or platinum, and a phosphine compound, or is a ruthenium chloride.

Abstract: Novel disubstituted dichlorosilane compounds which have two different specified substituents and are necessary as monomers for preparing special silicone resin are provided and a method for producing same without accompaniment of by-product production is also provided.

Abstract: In the method of producing 3-chloropropyltrichlorosilane by the addition reaction of trichlorosilane to allyl chloride, [Pt(PPh.sub.3).sub.2 Cl.sub.2 ] is used as the catalyst for the reaction.Side reactions are suppressed to give a high yield of the product.

Abstract: A process for the addition of Si-bonded hydrogen to an aliphatic multiple bond in the presence of a platinum catalyst which is obtained by dissolving a platinum halide in at least 20 parts by weight of olefin for each part by weight of the platinum halide, and subsequently heating and mixing the solution obtained with from 0.5 to 1 mole of a primary and/or secondary amine for each gram atom of platinum.

Abstract: The invention provides a novel class of organosilane compounds having a glycidyloxy group and one or more of alkenyloxy groups bonded to the silicon atom as represented by the general formula ##STR1## in which R.sup.1 is a monovalent hydrocarbon group having from 1 to 8 carbon atoms, R.sup.2, R.sup.3 and R.sup.4 are each a hydrogen atom or a monovalent hydrocarbon group having from 1 to 8 carbon atoms, m is an integer of 3, 4 or 5 and n is a number of zero, 1 or 2. The organosilane compound, e.g. 3-glycidyloxypropyl-containing alkenyloxysilanes can be readily prepared by the addition reaction of glycidyl allyl ether and a corresponding alkenyloxysilane having a hydrogen atom directly bonded to the silicon atom in the presence of a platinum catalyst. The organosilane compounds are useful as a coupling agent to increase adhesive bonding strength between inorganic and organic materials.

Abstract: This invention relates to the preparation of organosilicon compounds by the addition of a silicon compound containing Si-bonded hydrogen to a compound having an aliphatic multiple bond in the presence of a catalyst which promotes the addition of Si-bonded hydrogen to compounds containing an aliphatic multiple bond. In this process the reactants and the catalyst are continuously introduced into a pipe-shaped reactor while the contents of the reactor, which are maintained in a liquid phase by the application of pressure are circulated in the reactor at a rate of at least 1,000 cm per minute and while the reaction mixture is continuously being removed from the reactor.

Abstract: Novel diaralkyldichlorosilanes expressed by the general formula (I) ##STR1## (wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 each represent hydrogen atom or an alkyl group having 1.about.4 carbon atoms, but a case where R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are all hydrogen atom is excluded),and a process for producing the same are provided.They are useful as monomers for producing polysiloxanes and as intermediates for synthesizing novel organosilicon compounds.

Abstract: In the addition of an unsaturated compound into a silane of the formulaR.sub.1 R.sub.2 SiXHwhereinX is Cl or Br, andR.sub.1 and R.sub.2 each independently is an alkyl, aryl or aralkyl radical with up to 20 C atoms, or an alkenyl or alkinyl radical with up to 12 C atoms,the improvement which comprises effecting the addition reaction in the presence of at least one of aluminum chloride, aluminum bromide, aluminum oxychloride and aluminum oxybromide.

Abstract: A process for the production of an ethylsilane, which comprises contacting vinyl chloride with hydrogen silane in the presence of a platinum or palladium catalyst at a pressure of not less than 5 bars.