Abstract: This invention provides organosiloxane compounds containing silicon-bonded polyoxometalate (POM) structures that are present as pendant groups. The invention also provides methods for preparing these reaction products.

Abstract: Iron and titanium oxide thin films are deposited onto functionalized self-assembled monolayers (SAMs) which are bonded to silicon or glass substrates. The resulting oxide thin films have ordered, uniform densely packed crystalline structures.

Abstract: Chloromethyltrichlorosilane is converted to polychlorocarbosilane and in turn to a polycarbosilane polymer that has utility as a precursor to silicon carbide ceramics.

Abstract: The invention relates to polymeric organosiloxane ammonium salts having a silica-like skeleton and including units of Formula (I): ##STR1## wherein R.sup.1 and R.sup.2 are identical or different and signify a group of Formula (II): ##STR2## wherein R.sup.5 is an alkylene group and the oxygen atoms are saturated by silicon atoms of additional groups corresponding to Formula (II), optionally with the insertion of cross-linking agents; R.sup.3 represents groups corresponding to R.sup.1 or R.sup.2, or hydrogen or an alkyl group; R.sup.4 represents hydrogen or an alkyl group; x is the charge number of an oxo anion of a monooxo-, isopolyoxo- or heteropolyoxo acid of the elements vanadium, niobium, tantalum, molybdenum or tungsten; and oxo groups of the X anion also may be replaced by peroxo groups. The invention also includes methods of preparing the salts of Formula (I) from salts of the type (R.sup.1 R.sup.2 R.sup.3 R.sup.4 N.sup.+).sub.y Y wherein Y is different from X.

Abstract: A composition of matter is provided which comprises low-shrinkage, wet-type unsaturated polyester (B.M.C.) having high thermal conductivity, glass fibers, and a particulate aluminum nitride filler having high thermal conductivity. Also provided is an electrical component housing which possesses high thermal conductivity and heat dissipation properties including a body of a low-shrinkage, wet-type unsaturated polyester (B.M.C.) composition having high thermal conductivity.

Abstract: A process for the gelling of a silicone varnish comprises reacting the silicone varnish with an organic coupling agent, preferably an organometallic coupling agent under conditions which are effective and to provide a gel. This gel has a viscosity which is effective for suspending high density particles in the resin without settling of the particles during subsequent processing such as spraying, casting, and/or curing processes. The silicone varnish contains hydroxyl substituents, and is preferably a polyhydroxy substituted silicone varnish, i.e., silanols.

Abstract: A process for preparing metallopolysilanes, which comprises reacting at least one disilane of the general formulaR.sub.6-n Si.sub.2 (OR.sup.1).sub.n (I)in which R may be the same or different and is a hydrogen atom or a monovalent hydrocarbon radical, R.sup.1 is the same or different monovalent alkyl groups, and n is 2, 3, 4, 5 or 6, and optionally mixed with at least one compound of the general formulaR.sup.2.sub.4-m Si(OR.sup.4)m (II)in which R.sup.2 may be the same or different and is the same as R, R.sup.4 may be the same or different and is the same as R.sup.1, and m is 1, 2, 3 or 4, with at least one compound of the general formula(R.sup.5 O)[A(OR.sup.5).sub.a-2.sup.O].sub.x R.sup.5 (III)in which R.sup.5 may be the same or different and is the same as R.sup.1, A is a metal from group IIa, IIIa, IVa, Va, IIIb, IVb or Vb of the Periodic Table, x is an integer of from 1 to 1,000, and a represents the valency of A, in the presence of at least one compound of the general formulaMOR.sup.3 (IV)in which R.sup.

Abstract: Spherical, polymeric organosiloxane ammonium compounds are disclosed with a silica-like skeleton consisting of: ##STR1## units in which R.sup.1 and R.sup.2 stand for a group ##STR2## in which R.sup.5 is alkylene the oxygen atoms are saturated by silicon atoms of other groups (II) with the optional inclusion of cross-linking agents, R.sup.3 has the meaning of R.sup.1 and R.sup.2 or stands for hydrogen, alkyl, cycloalkyl or benzyl, R.sup.4 is hydrogen or alkyl, cycloalkyl, benzyl, allyl, propargyl, chloroethyl, hydroxyethyl or chloropropyl, X stands for a monovalent to trivalent anion of a protonic acid which forms stable salts with amine bases and x can be a number from 1 to 3.

Abstract: Metal-containing, shaped, polymeric, tertiary and/or secondary organosiloxane amine compounds are introduced which contain the metals Pd, Pt, Ru, Rh individually or in combination as well as optional promotors and/or moderators. The organosiloxane amine functioning as carrier for the metals contains the units ##STR1## and/or units ##STR2## in which R.sup.1 to R.sup.5 are a group ##STR3## with R.sup.6 as a double-bonded group bound to N and Si (e.g. an alkylene group) and X is an amine group such as The carrier substance can be cross-linked with cross-linking agents containing Si, Ti, Zr or Al. The metal-containing product is spherical in form and is defined by the parameters of sphere diameter, specific surface and pore volume as well as bulk density. A method of production is disclosed which can be carried out in several variants as well as the use of the metal-containing product as catalyst for hydrogenation reactions and oxidation reactions.

Abstract: A block copolymer is prepared by reacting an aluminum-nitrogen polymer and a silazane polymer at a temperature not greater than 400.degree. C. Block copolymers containing alkenyl or alkynyl groups can be crosslinked by supplying energy to generate free radicals. An AlN/SiC containing ceramic is formed by pyrolyzing the crosslinked block copolymer in a nonoxidizing atmosphere.

Abstract: A method of forming modified preceramic polymers comprising mixing organopolysilanes having a plurality of Si--H functional groups with an effective amount of a metallocene compound, and allowing the mixture to undergo a dehydrogenative reaction is disclosed. Pyrolysis of the modified polymer provides in high yields ceramic residues that approach stoichiometric SiC in composition. Preferably the organopolysilane starting material contains a plurality of tertiary Si--H bonds and has the general formula of [(RSiH).sub.x (RSi).sub.y ].sub.n where the sum of the coefficients x and y equal 1, n is an integer greater than 1, R is a lower alkyl group having from 1 to about 8 carbon atoms, a substituted or unsubstituted lower alkenyl group having from 2 to about 8 carbon atoms, a cycloalkyl group having from 3 to about 10 carbon atoms, substituted or unsubstituted aryl group having from 6 to about 10 carbon atoms.

Abstract: Polycarbosilanes having Si units which are linked by phenyl-substituted methylene bridges or by partially or completely fluorinated hydrocarbon bridges. These polycarbosilanes are obtained by a Grignard polycondensation reaction. If phenyl substituents are present on the silicon atoms of the polycarbosilanes, they may also optionally be exchanged for halogen atoms in additional halogenating reactions, so that polycarbosilanes can be prepared which are both fluorinated on the hydrocarbon bridges and halogenated (particularly fluorinated) on the silicon atoms.

Abstract: Hybrid sol-gel materials comprise silicate sols cross-linked with linear polysilane, polygermane, or poly(silane-germane). The sol-gel materials are useful as optical identifiers in tagging and verification applications and, in a different aspect, as stable, visible light transparent non-linear optical materials. Methyl or phenyl silicones, polyaryl sulfides, polyaryl ethers, and rubbery polysilanes may be used in addition to the linear polysilane. The linear polymers cross-link with the sol to form a matrix having high optical transparency, resistance to thermooxidative aging, adherence to a variety of substrates, brittleness, and a resistance to cracking during thermal cycling.

Abstract: Polycarbosilane compositions, which can serve as silicon carbide precursors, are formed by a Grignard coupling reaction of a halomethylcarbosilane followed by reduction using a metal hydride. The polycarbosilane compositions that result have a substantially 1:1 silicon to carbon stoichiometry, are substantially non-cyclic and branched, and comprise the repeat units SiH.sub.3 CH.sub.2 --, --SiH.sub.3 CH.sub.2 --, .dbd.SiHCH.sub.2 --, and .tbd.SiCH.sub.2 --.

Abstract: Crosslinked or crosslinkable organosilicon polymers and prepolymers comprising either (i) alternating (a) cyclic polysiloxane or tetrahedral siloxysilane residues and (b) polycyclic hydrocarbon residues derived from polycyclic polyenes having at least two non-aromatic, non-conjugated carbon-carbon double bonds in their rings linked through carbon to silicon bonds, wherein at least one of the cyclic polysiloxanes or tetrahedral siloxysilanes (a) or the polycyclic polyenes (b) used to form the polymer or prepolymer has three or more reactive sites; or (ii) a linear poly(organohydrosiloxane) polymer having at least 30% of its .dbd.SiH groups reacted to hydrocarbon residues derived from polycyclic polyenes having at least two non-aromatic, non-conjugated carbon-carbon double bonds in their rings; wherein the polymer or prepolymer further comprises a coupling monomer having at least one carbon-carbon double bond which reacts with SiH during hydrosilation.

Abstract: Water-borne alkyd resin compositions are disclosed comprising maleinized fatty acid. Substitution of the aromatic triacid component of the composition with the maleinized fatty acid permits a reduction in the amount of organic cosolvent employed to solubilize the resin in the water. Alkyd resin containing paint formulations also are disclosed.

Abstract: The invention relates to a novel hydrolyzable silicone resin composition comprising a polysiloxane having at least one polyvalent metal ester group represented by either one of the following formulae:(--COO--) (.sub.m --M--(R.sub.2).sub.n--R.sub.1 --COO--).sub.m --M--(R.sub.2).sub.n ##STR1## in which R.sub.2 is a hydroxyl group, an alkoxyl group, an alkyl group, a halogen or oxygen atom; R.sub.1 is a bivalent organic residue; p and q each is 0 or an integer of 1 to 8; m is an integer of 2 or more; n is 0 or an integer of 1 or more, providing that the sum of m and n is equal to the valence number of metal M; and M is a bivalent to tetravalent metal selected from the group consisting of Ti, Al, Mg, Zn, Pb, Zr, Cu, Ni, Co and Sn, its preparation and coating composition containing the same, which is useful in an antifouling paint.

Abstract: Spherical, polymeric organosiloxane ammonium compounds are disclosed with a silica-like skeleton consisting of: ##STR1## units in which R.sup.1 and R.sup.2 stand for a group ##STR2## in which R.sup.5 is alkylene the oxygen atoms are saturated by silicon atoms of other groups (II) with the optional inclusion of cross-linking agents, R.sup.3 has the meaning of R.sup.1 and R.sup.2 or stands for hydrogen, alkyl, cycloalkyl or benzyl, R.sup.4 is hydrogen or alkyl, cycloalkyl, benzyl, allyl, propargyl, chloroethyl, hydroxyethyl or chloropropyl, X stands for a monovalent to trivalent anion of a protonic acid which forms stable salts with amine bases and x can be a number from 1 to 3.

Abstract: Essentially infusible/insoluble crosslinked polysilazanes, well adapted for pyrolysis and conversion into silicon carbide and/or silicon nitride ceramic materials, are produced by intimately contacting a fusible and organic solvent soluble polysilazane starting material with an effective crosslinking amount of gaseous triflic acid, CF.sub.3 SO.sub.3 H, and in which starting polysilazane the organic radicals directly bonded to silicon atoms are saturated and/or aromatic hydrocarbon radicals and such starting polysilazane being devoid of hydrogen atoms directly bonded to a silicon atom.

Abstract: A composition suitable for forming a pressure sensitive adhesive is provided comprising a homogeneous mixture of two intermediate pressure sensitive adhesive compositions. The pressure sensitive adhesives formed by curing this composition have improved peel strength and adhesion properties.

Abstract: Disclosed herein is a method of labeling room temperature vulcanizable silicon polymers at the "T" junction branch points by utilizing cross-linkers of the formula D-SiX.sub.3, wherein X is a leaving group and D is a complex organic molecule useful as a dye, fluorophore, or indicator.

Abstract: Disclosed is an automotive coating composition comprising (i) a basal resin which is either (a) a copolymer containing a specific polysiloxane macromonomer having two or more functional groups selected from the class consisting of hydroxyl and alkoxy groups per molecule and a number average molecular weight of 400 to 100,000 and an oxirane group-containing vinyl monomer as comonomer units or (b) a mixture of a polymer (I) containing said polysiloxane macromonomer as an essential monomer unit and a polymer (II) containing an oxirane group-containing vinyl monomer as an essential monomer unit and (ii) a chelate compound selected from the class consisting of aluminum chelate compounds, titanium chelate compounds and zirconium chelate compounds.

Abstract: An infusible organic silazane polymer is prepared by melting, shaping, and infusibilizing an organic silazane polymer. The infusibilizing step includes two steps of treating the shaped polymer with a gas containing the vapor of an infusibilizing silicon, boron, phosphorus or metal compound and further treating with a water vapor-containing gas or ammonia gas. The infusible polymer is efficiently sintered into ceramic fibers without fusion bond.

Abstract: Hollow ceramic fibers are prepared by melt spinning an organic silazane polymer, infusibilizing the fiber to form an infusible layer on the surface, and pyrolyzing the fiber to obtain a ceramic fiber having an empty interior. The infusibilizing step includes two steps of treating the fiber with a gas containing the vapor of an infusibilizing silicon, boron, phosphorus or metal compound and further treating with a water vapor-containing gas or ammonia-containing gas. The surface infusible fibers are efficiently sintered into hollow ceramic fibers without fusion bond.

Abstract: A heat-resistant paint comprising a dispersion or solution of a polymetallocarbosilane and an inorganic filler in an organic solvent,wherein said polymetallocarbosilane is an organometallic polymer having a number average molecular weight of 400 to 50,000 comprising(A) carbosilane bond units of the formula ##STR1## wherein R.sub.1 and R.sub.2 may be identical or different and each represents a lower alkyl group, phenyl group or a hydrogen atom, and(B) metalloxane bond units of the formula(M--O)wherein M represents at least one element selected from the group consisting of Ti, Zr, Cr and Mo,wherein said inorganic filler is at least one material selected from the group consisting of oxides, borates, phosphates, silicates, silicides, borides, nitrides and carbides; andwherein said inorganic filler is present in an amount of 10 to 900 parts by weight per 100 parts by weight of said polymetallocarbosilane.

Abstract: Transesterification curing of ester polymers and hydroxyl polymers is effected by the inclusion of a transesterification catalyst comprising a catalytic amount of epoxy resin and certain inorganic salts.

Abstract: A process for the preparation of preceramic metallopolysilanes is described. The process consists of reacting polysilanes with metallic compounds from which can be generated open coordination sites associated with the metallic element. Such open coordination sites can be generated by the reduction of the metallic compound with an alkali metal reducing agent, or by heating a metallic compound which has thermally labile ligands, or by the UV irradiation of a carbonyl-containing metallic compound. The metals which can be incorporated into the polysilane include aluminum, boron, chromium, molybdenum, tungsten, titanium, zirconium, hafnium, vanadium, niobium, and tantalum. These metallopolysilanes are useful, when fired at high temperatures, to form metal-containing ceramic materials.

Abstract: A novel polymetalosilazane having a metal/silicon atomic ratio of from 0.001 to 3 and a number average molecular weight of about 200 to 500,000 is prepared by a process comprising: reacting a polysilazane having a number average molecular weight of about 100 to 500,000, which has a skelton consisting substantially of units ##STR1## at least one R being hydrogen, with a metal alkoxide in which the metal is selected from metals of the groups IIA and III to V of the Periodic Table.

Abstract: A process for treating a polysilazane, characterized in that a polysilazane possessing on average at least two, and preferably at least three, hydrocarbon groups having aliphatic unsaturation per molecule is treated catalytically in the presence of a catalytically efficient amount of a co-ordination catalyst. The polysilazanes treated in this manner possess high thermal resistance and can be used, in particular, as precursors of ceramic products, with a high yield of inorganic product.

Abstract: A process for the catalytic treatment of a polysilazane containing an average of at least two, preferably at least three, .tbd.SiH groups per molecule with a catalytically effective quantity of a strong inorganic or organic acid catalyst. The other organic radicals in the polysilazane that are bonded to the silicon or nitrogen atoms are hydrocarbon radicals free from alkene or alkyne unsaturations. The polysilazanes treated in this manner can be characterized by good thermal behavior and can be used, in particular, as precursors of ceramic products with a high yield of inorganic products.

Abstract: New rhodium containing organopolysiloxane-ammonium compounds are described which consist of units of the formula ##STR1## in which R.sup.1, R.sup.2 and R.sup.3 are R.sup.5 --SiO.sub.3/2 (2), R.sup.5 is an alkylene group and the free valences of the oxygen atoms are saturated by silicon atoms of other groups (2), optionally with the insertion of cross-linking agents, R.sup.4 is hydrogen, an alkyl, cycloalkyl or benzyl group, x.sup.n-- is a complex monovalent or polyvalent metal anion of rhodium and chloride, bromide or iodide. Methods for preparing these rhodium-containing organopolysiloxane-ammonium compounds as well as their use as catalysts in reactions with carbon monoxide are also disclosed.

Abstract: The invention relates to a process for preparing moldings based on silicon oxycarbide, which comprises reacting a molding containing from 50 to 90 percent by weight of silicon oxycarbide having an average particle size of from 0.5 to 50 um with from 10 to 50 percent by weight of a silicone resin having the general formula[(CH.sub.3 SiO).sub.x (OR).sub.y (OH).sub.z ].sub.n,in which R is an alkyl radical having from 1 to 4 carbon atoms, x is in the range of from 1.4 to 1.5, y is in the range of from 0 to 0.08, z is in the range of from 0 to 0.08 and n is in the range of from 20 to 40, under a nonoxidizing atmosphere or in a vacuum at temperatures in the range of from 700.degree. to 1500.degree. C.

Abstract: A method for the cathodic protection of a metal object is disclosed. The object is coated with a resin-containing curable silicone composition which contains a minor portion of a triorganosiloxy endblocked diorganopolysiloxane. After the silicone composition is cured, the object is maintained at a negative potential relative to an electrically conductive environment by a current source means. The compositions of the present invention have been found to exhibit significant improvement with respect to cathodic disbondment relative to similar silicone compositions of the prior art.

Abstract: A method of forming preceramic polymers using a organopolysilane 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 lower alkenyl group having from 2 to about 6 carbon atoms, a substituted or unsubstituted lower aryl group having from 6 to about 10 carbons atoms, a tri(lower)alkyl- or di(lower)alkylsilyl group and n is an integer greater than 1, and reacting it with alkali metal amides or silylamides in catalytic quantities is disclosed. Preferably, the alkali metal amide is a polymeric alkali metal silylamide of the formula [(R.sup.1 SiHNH).sub.a (R.sup.1 SiN).sub.b (R.sup.1 SiHNM).sub.c ].sub.m where a+b+c=I; R.sup.

Abstract: An adhesive composition comprising (1) a polymetallocarbosilane or a polycarbosilane and (2) a silicone resin. The adhesive composition further comprises an inorganic filler.

Abstract: Halogenated polycarbosilanes are prepared by reacting a polycarbosilane containing at least 0.1 weight percent Si-H groups with a halogenating reagent selected from the group consisting of chlorine, bromine, phosphorous pentachloride, phosphorous pentabromide, antimony pentachloride, N-chlorosuccinimide, N-bromosuccinimide, sulfonyl chloride, and mixtures of CH.sub.e X.sub.f and a free radical initiator where e is 0 or 1, f is 3 or 4, the sum (e+f) is 4, and X is chlorine or bromine. The halogenated polycarbosilanes can be further treated to produce other derivatized polycarbosilanes. The halogenated and derivatized polycarbosilanes can be converted to silicon carbide-containing ceramic materials by pyrolysis at elevated temperatures under an inert atmosphere.

Abstract: Cross-linked organosilazane polymers which are useful as ceramic precursors and film casting are disclosed.

Abstract: A method for stablizing organopolysiloxanes containing phosphonitrilic chlorides and/or their reaction products against viscosity changes by reacting the phosphorus compounds present in the organopolysiloxanes with at least one oxide, hydroxide or carbonate of a divalent or trivalent metal, and thereafter separating the solid from the organopolysiloxanes.

Abstract: A process for the treatment of polyorganosilazanes and/or polyorgano(disilyl)silazanes with an effective quantity of a catalyst system comprising (i) an ionic inorganic salt of the formula M.sup.30 A.sup.-, and (II) a compound capable of complexing with the cation M.sup.+ of the salt. The M.sup.+ cation is a metal ion or a quaternary ammonium ion, and A.sup.- is a compatible anion.The polysilazanes are selected from organopolysilazanes and organopoly(disilyl)silazanes. When treated in this manner, the polysilazanes are characterized by good thermal behavior and can, in particular, be used, after pyrolysis, as precursors of ceramic products.

Abstract: Novel linear polysiloxane-polylactone block copolymers are useful as surface modifying additives due in part to their miscibility with a wide variety of base polymers. A particularly preferred polysiloxane-polycaprolactone linear blocked copolymer is miscible with nylon and is useful for forming surface modified nylon products.

Abstract: A diorganopolysiloxane terminated at both molecular chain ends each with a monohydrocarbyl dialkoxy silyl group, which is useful as a base ingredient in room temperature-curable silicone rubber compositions, is prepared by first reacting a silanol-terminated diorganopolysiloxane with a monohydrocarbyl tri(ketoxime) silane to replace the silanolic hydroxy group with a monohydrocarbyl di(ketoxime) siloxy group and then reacting the oxime-terminated diorganopolysiloxane with a monohydric alcohol, e.g. methyl alcohol, to replace the ketoxime groups with alkoxy groups. The reactions can proceed under very mild conditions without any catalyst so that the desired alkoxy-terminated diorganopolysiloxane is obtained in a high purity.

Abstract: A method of forming preceramic polymers using a polycarbosilane having repeat units of the formula [RSi(H)--(CH.sub.2).sub.q ] (where R is H, 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 carbons atoms, q is an integer 1 or greater), by reacting it with alkali metal silylamides in a weight ratio of polycarbosilane:silylamide of 10:1 or less is disclosed. Preferably, the alkali metal silylamide is a polymeric alkali metal silylamide of the formula [(R.sup.1 SiHNH).sub.a (R.sup.1 SiN).sub.b (R.sup.1 SiHNM).sub.c ].sub.m where a+b+c=1; R.sup.

Abstract: A method of forming preceramic polymers using a organopolysilane 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 lower alkenyl group having from 2 to about 6 carbon atoms, a substituted or unsubstituted lower aryl group having from 6 to about 10 carbons atoms, a tri(lower)alkyl- or di(lower)alkylsilyl group and n is an integer greater than 1, and reacting it with alkali metal amides or silylamides in catalytic quantities is disclosed. Preferably, the alkali metal amide is a polymeric alkali metal silylamide of the formula [(R.sup.1 SiHNH).sub.a (R.sup.1 SiN).sub.b (R.sup.1 SiHNM).sub.c ].sub.m where a+b+c=1; R.sup.

Abstract: An organosilicon polymer whose main-chain skeleton is composed mainly of following structural units (A), (B), (C), (D), (E) and (F) ##STR1## wherein R represents CH.sub.3 or H, said structural units forming linear, branched and cyclic structures, and said main-chain skeleton further having a polysilane skeleton ##STR2## (2.ltoreq.n.ltoreq.10). The said organosilicon polymer can be produced by adding at least one anhydrous metal halide to a polysilane having the structure ##STR3## the amount of the metal halide being 0.5 to 10% by weight based on the weight of the polysilane; and heating the mixture in an atmosphere inert to the reaction.

Abstract: The present invention relates to novel polymer compositions and the novel method of their synthesis. The novel polymer compositions are synthesized by forming a tetrahydrofuran solution of a polymer selected from the group consisting of polyvinylchloride, polystyrene, and silicone; adding an anhydrous manganese salt of the formula:MnX.sub.2wherein X is a species capable of forming an anion, preferably a halogen or a thiocyanate, then adding to the solution of polymer and manganese salt, a phosphine of the formula:PR.sup.1 R.sup.2 R.sup.3wherein R.sup.1, R.sup.2, and R.sup.3 may be the same or different, and each is selected from the group consisting of substituted or unsubstituted alkyl, cycloalkyl or aryl groups or hydrogen, provided that no more than two of the groups R.sup.1, R.sup.2, and R.sup.3 are substituted or unsubstituted aryl groups and that at least one of the groups R.sup.1, R.sup.2, and R.sup.3 is a substituted or unsubstituted alkyl, cycloalkyl or aryl group.

Abstract: An improved molding process is provided which comprises treating a mold surface with certain curable silicone compositions to improve the release of molded articles from the mold. The silicone mold release composition is obtained by mixing predominately hydroxyl terminated polydimethylsiloxane, an alkoxysilane such as methyltrimethoxysilane, a metal alkoxide such as tetraalkyltitanate and a non-reactive, volatile solvent. The composition is stable if stored in containers that exclude moisture, but cures when exposed to moisture. Molds with surfaces coated by these compositions provide easy release of many successively molded articles such as high resiliency polyurethane foam cushions for automobiles.

Abstract: What is disclosed is a process for preparing a silicon nitride-containing ceramic material from a R.sub.3 SiNH-containing silazane polymer, which has been rendered infusible by treatment with certain reactive metal halides, by heating the infusible silazane polymer to an elevated temperature under an inert atmosphere. Suitable reactive metal halides are of the general formula MX.sub.n or R.sub.b SiX.sub.(4-b) where M is a metal atom of valence n, X is chlorine or bromine, R is selected from the group consisting of vinyl, hydrogen, phenyl, and alkyl radicals containing 1 to 3 carbon atoms, and b has a value of 0, 1, or 2. Preferred reactive metal halides are SiCl.sub.4 and HSiCl.sub.3.

Abstract: The disclosure of this application is directed to water-curable, silane modified thermoplastic polymers, which are particularly useful as extrudates about wires and cables providing insulation or jacketing thereon, produced by reacting a mixture containing an organo titanate and a thermoplastic polymer having pendant silane moieties.

Abstract: A liquid composition comprising a dispersion of silica colloid in alcohol and a thermo-setting resin. The dry film of this composition is superior in chemical resistance, surface hardness, abrasion resistance, heat resistance and adhesiveness to a substrate.

Abstract: Relatively stable masterbatch compositions are provided comprising a matrix having a polysiloxane dispersed therein, prepared by admixing a solid or liquid matrix, a monomeric silane and a silane condensation catalyst with the result that the monomeric silane condenses to a polysiloxane which is dispersed throughout the matrix per se or as a reactant therein. The masterbatch composition can be admixed with alkylene-alkyl acrylate copolymers in the presence of an organic titanate, to produce water-curable compositions, containing water-curable, silane modified alkylene-alkyl acrylate copolymers, which are useful as extrudates about wires and cables providing protective coatings thereon.