Abstract: Radiation-curable silicone resin abrasion-resistant coatings are produced from the hydrolysis/condensation of tetra-alkoxysilanes, the condensation thereof with amine alcohol and combination with multifunctional acrylate monomers and oligomers. The cured compositions of the invention exhibit excellent abrasion resistance and offer low cost manufacture.

Abstract: The present invention relates to a release coating composition comprising an organopolysiloxane having fluorine containing organic groups and alkenyl groups, an organohydrogensiloxane, and a platinum-containing catalyst. The present invention also relates to a release coating composition comprising an organopolysiloxane having fluorine containing organic groups and silicon-bonded hydrogen groups, an alkenyl functional organopolysiloxane, and a platinum-containing catalyst. The curable silicone release coating compositions of this invention have excellent release properties from various tacky substances, especially silicone-based pressure sensitive adhesives, after curing, and also have excellent bonding characteristics when applied to various substrates.

Abstract: The invention is a method for the preparation of organic solvent-soluble polyheterosiloxanes containing MO.sub.2 (M=Ti or Zr) and SiO.sub.2 units. A compound MA.sub.4 (M=Ti or Zr, A=hydrolyzable group) and a compound Si(OR).sub.4 (R=hydrocarbon group or alkali metal atom) are hydrolyzed and condensed in the presence of a carboxylic acid, a phenol, or a diketone. This is followed by the addition of an organosilane R.sup.1.sub.3 SiX (R.sup.1 =hydrogen or hydrocarbon group, X=hydrolyzable group) and hydrolysis and condensation.

Abstract: Disclosed is a liquid epoxy resin composition comprising (A) a liquid epoxy resin, (B) a dimethylpolysiloxane having epoxy groups at its both ends, and (C) a dispersing agent comprising the reaction product of (C-1) a dimethylpolysiloxane having amino groups or carboxyl groups reactive with epoxy resins at its side chains or both ends and having phenyl groups or polyether groups for improving its compatibility with epoxy resins at its side chains, and (C-2) an epoxy resin having the same structure as the component (A). The composition has a reduced internal stress, while maintaining the heat resistance intrinsic to epoxy resins, and has excellent resistance, crack resistance and heat shock resistance.

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 radiation and moisture curable silicone conformal coating composition comprises a silicone fluid of a monovalent ethylenically unsaturated functional group endcapped silicone and at least one (meth)acryl-functionalized silicone; and a photoinitiator effective for radiation curing of the silicone composition. The encapped silicone is the product of a reaction between a silanol terminated silicone and a silane cross linker having joined directly to a silicon atom thereof a monovalent ethylenically unsaturated functional group and at least 2 hydrolyzable groups.

Abstract: The present invention is concerned with the use of linear phosphonitrilic chloride catalyst to make low molecular weight linear siloxanes.

Abstract: The present invention relates to silicone release coating compositions comprising (A) a mixture of (i) a dimethylsiloxane-methylvinylsiloxane-methylphenylsiloxane copolymer and (ii) a dimethylsiloxanemethylvinylsiloxane copolymer, (B) an organohydrogenpolysiloxane, (C) a platinum catalyst, and (D) an organic solvent. The silicone release coating compositions of the present invention provide small release resistance values both at low and high peeling velocities and do not impair the residual adhesion of tacky substances that have come into contact with the coating.

Abstract: Epoxysilicone polyether block copolymers, when combined with certain sulfonium photocatalysts, provide one-component shelf-stable UV curable compositions. Non-polyether containing epoxy silicones form one part UV curable compositions with sulfonium salt solubilized in the presence of fluoroalcohols.

Abstract: Short-chain linear phosphazenes as well as products of their reactions with water, alcohols and organosiloxanes, and the like, are active catalysts for polycondensation and redistribution of organosiloxane polymers.

Abstract: The present invention utilizes a class of novel hydrosilation catalysts that are inhibited in the absence of molecular oxygen to prepare storage stable, one part curable compositions containing (1) compounds with alkenyl radicals and (2) compounds with silicon-bonded hydrogen atoms. The compositions are stable until exposed to molecular oxygen, at which time they cure in the same manner as conventional compositions containing these ingredients.

Abstract: Straight-chain diorganopolysiloxanes having alkoxy endgroups, well adapted for formulation into single-component polysiloxane compositions which are stable on storage in the absence of moisture, but which crosslink into elastomeric state in the presence of moisture, are prepared by reacting a dihydroxydiorganopolysiloxane with a polyalkoxysilane, and advantageously also with an alkanol, in the presence of a catalytically effective amount of sodium hydroxide or potassium hydroxide.

Abstract: An addition-curing type organopolysiloxane composition comprising, in addition to an alkenyl-containing organopolysiloxane and an organohydrogenpolysiloxane, an amine compound represented by the general formula:(R.sup.2).sub.2 N--R.sup.4 --N(R.sup.3).sub.2wherein R.sup.2 is an alkyl radical of from 1 to 4 carbon atoms, R.sup.3 is an alkyl radical of from 1 to 4 carbon atoms or a hydrogen atom, and R.sup.4 is an alkylene radical of from 2 to 4 carbon atoms, or an amine compound represented by the general formula:R.sup.5 --NH.sub.2wherein R.sup.5 is an alkyl radical of from 2 to 4 carbon atoms, and acetylene alcohol. The composition has excellent long-time shelf stability at room temperature and, when heated, rapidly cures to yield a gel form or elastomer form cured product.

Abstract: The present invention relates to an improved process for preparing foams comprising reacting polyisocyanates with an in situ produced stable low solids dispersion of polyureas and/or polyhydrazodicarbonamides in a hydroxyl-group-containing material as a dispersing agent by reacting:(a) organic polyisocyanates with(b) a member selected from the group consisting of (i) polyamines containing primary and/or secondary amino groups, (ii) hydrazines, (iii) hydrazides, or (iv) mixtures thereof, in(c) said hydroxyl-group-containing material.

Abstract: A room temperature vulcanizing type electroconductive silicone rubber composition comprising(A) 100 parts by weight of an organopolysiloxane having in one molecule thereof at least two hydroxyl groups and/or alkoxy groups, said hydroxyl groups and alkoxy groups being bonded to silicon atoms;(b) 10 to 850 parts by weight of a powdery or fibrous metallic oxide-type electroconductive material showing a white or a light and bright color;(C) 0.1 to 30 parts by weight of a crosslinking agent;(D) 0 to 5 parts by weight of a crosslinking catalyst; and(E) 1 to 500 parts by weight of a volatile organic solventis disclosed. The composition can cold cure to form a rubber-like elastomer showing a white color or a light and bright color and having a stable semiconducting properties over a long period of time.

Abstract: A composition which is an aqueous solution including (i) an alkyltrialkoxysilane with C.sub.1 to C.sub.6 alkyl groups on silicon; (ii) a silane coupling agent, (iii) an amino resin, and (iv) a quaternary ammonium silane. The composition is used to render surfaces water repellent.

Abstract: A surface treating composition for excluding water penetration which is a solution obtained by combining water; an alkyltrialkoxysilane selected from the group consisting of C.sub.1 to C.sub.6 alkyl groups on silicon and blends of alkyltrialkoxysilanes with C.sub.1 to C.sub.6 alkyl groups on silicon; a silane coupling agent; and an aqueous silicone emulsion of an anionically stabilized hydroxyl endblocked polydiorganosiloxane, amorphous silica and an organic tin salt.

Abstract: A coating composition comprising a colloidal silica, an organohydroxysilane, a partial condensate of the organohydroxysilane and a liquid medium containing ethylene glycol monobutyl ether in an amount of at least 20% by weight, which is applied to a substrate, shows excellent properties such as storage stability, workability for coating or painting, heat resistance, surface hardness, chemical resistance, abrasion resistance, scratch resistance, stain resistance and weather resistance.

Abstract: Liquid organosiloxane MTQ resins of the general formula [M.sub.x T.sub.y Q.sub.z ].sub.n wherein M denotes a monofunctional, T a trifunctional and Q a tetrafunctional siloxane unit, n has an average value of from 4 to 14, x+y is not less than z and not more than 2 z and x/y has a value of from 2 to 9 are prepared by a method comprising (I) adding together (A) a silane of the general formula SiZ.sub.4, (B) a silane of the general formula RSiY.sub.3 and (C) a silane of the formula R.sub.3 SiX or (C') a disiloxane of the formula (R.sub.3 Si).sub.2 O in an acidic aqueous medium and (II) allowing Components (A), (B) and (C) or (C') to react together. X denotes a halogen or alkoxy group, Y denotes X or --OSiR'.sub.3, Z denotes an alkoxy group and Component (A) is not added to the aqueous medium prior to Components (B) and (C) or (C').

Abstract: The invention is a method of manufacturing a substrate, and particularly of manufacturing a release paper. The method comprises coating a release paper base with a primer coat, and curing the primer coat. The cured primer coat is then overlayed with a heat-curable or an ultraviolet-curable silicone coating which is, in turn, cured with heat or ultraviolet light. A product manufactured in accordance with this method enables a facing adhered to this release paper to be removed relatively easily from that release paper.

Abstract: The present invention provides microencapsulated liquid or solubilized curing catalysts for one-part heat curable organosiloxane compositions. The curing catalysts are prepared by the photoinitiated polymerization of at least one solubilized hydroxyl-containing ethylenically unsaturated organic compound in the presence of a photoinitiator for the polymerization of said compound, an optional surfactant, and a liquid or solubilized curing catalyst for organosiloxane compositions. The curing agent is in the form of coordination complex with an ethylenically or acetylenically unsaturated organic compound and the solvent for the polymerization reaction is a mono- or polyhydric alcohol. At least a portion of the present microcapsules are less than one micron in diameter, and substantially all are less than about three microns in diameter. Compositions containing the preferred platinum group metals as catalysts are optically transparent.

Abstract: A curable organopolysiloxane composition comprising an organopolysiloxane gum having higher alkenyl groups, an organohydrogenpolysiloxane crosslinker, a solvent, a platinum group metal-containing catalyst and an inhibitor therefor provides for the formation of a tough, cured release film.When this composition is coated on the surface of any of various types of substrates, for example, paper, synthetic resin films, fibers, etc., and then heated for 10 to 20 seconds at 80 to 90 degrees Centigrade, it forms a cured film which manifests an extremely stable release performance for tacky substances, such as, for example, pressure-sensitive adhesives, and the like, while at the same time evidencing an excellent adherence to the substrate itself.The compositions can be used with synthetic resin films, such as polyolefin, which are easily deformed by heat and with poorly heat-tolerant paper.

Abstract: A dermatologically-acceptable, moisture vapor-permeable, pressure-sensitive adhesive composition that is a single-phase solid at ambient temperature and resists dissolution when exposed to water, comprises a polymer adhesive which is the product of a process comprising the steps of chain extending a water-soluble derivatized capped prepolymer which comprises a first terminal group and a low-temperature curable group, until the resultant polymer attains a determined level of tackiness, and then subjecting the polymer to low-temperature curing. The adhesive is used to advantage in medical products like adhesive bandages, plasters, dressings and surgical drapes, and can dissolve water-soluble bio-active additives.

Abstract: The specification describes and claims a composition curable to an elastomer in the presence of moisture and characterized in that it comprises the product obtained by mixing (A) 100 parts by weight of a polydiorganosiloxane having at least two silicon-bonded hydroxyl groups and wherein at least 50 percent of the total organic substituents are methyl groups, (e.g. according to the genertal formula H(OSiR".sub.2).sub.x OH wherein substantially all of the groups R" are methyl groups and x is an integer having an average value from 250 to 1500), (B) from 1 to 40 parts by weight of one or more oxime silanes of the general formulaR.sub.4-n Si(ON.dbd.CR'.sub.2).sub.nwherein each R represents an alkyl group having less than 6 carbon atoms, a vinyl group, an allyl group or a phenyl group, each R' represents an alkyl group having from 1 to 6 carbon atoms or a phenyl group and n has an average value of from 2.1 to 3 and (C) from 0.1 to 1.

Abstract: An improvement in the process for preparing an organometallic polymer having a main chain constituted of silicon and/or germanium or having a main chain constituted of a linkage including carbon and silicon or germanium and further having side chain constituted of organic substituting groups, such as alkyl or aryl group. The improved process comprises the step of dehalogenating an organosilane or organogermane halide in the presence of an alkali metal and a crown ether having 28 or less carbon atoms and 10 or less oxygen atoms, whereby the organosilane or organogermane halide is polymerized by condensation. The crown ether acts as a promotor, and preferable examples used in the process of the invention include 18-crown-6 and 12-crown-4. The molecular weight of the organometallic high polymer prepared by the process of the invention distributes within a relatively narrow range in the neighborhood of about 100,000, resulting in excellent moldability of the polymer.

Abstract: A method is provided for coating a substrate with a non-toxic irradiation curable epoxy resin composition. There is used an alkoxy-substituted aryl onium salt, in combination with a non-toxic oxirane-containing organic or silicone resin.

Abstract: This invention relates to thermoplastic, aromatic polycarbonates prepared with the aid of chain terminating agents corresponding to formula (I) ##STR1## to a process for the preparation of these polycarbonates and to their use for the production of moulded articles for optical purposes.

Abstract: This invention relates to a process for the preparation of polyarylene sulphides by melt condensation, in which the sulphide bridges of the polymer are formed by the splitting off of a compound which is volatile under the reaction conditions.

Abstract: This invention relates to a process for the preparation of polyarylene sulphides by melt condensation, in which the sulphide bridges of the polymer are formed by the splitting off of a compound which is volatile under the reaction conditions.

Abstract: The invention relates to organomineral products of high strength obtainable by reacting a polyisocyanate in an aqueous alkali silicate solution in the presence of a catalyst prompting the trimerization of the polyisocyanate. In preparing them, the catalyst is used in an amount of 5.5 to 14.5 mmole per mole of NCO groups in the reaction mixture. The organomineral products of the invention are suitable as construction, coating, sealing or insulating materials or as putty or adhesives.

Abstract: A process for the preparation of preceramic metallopolysilanes is described. The process consists of contacting and reacting organohalogendisilanes with metal-containing compounds in the presence of a redistribution catalyst in an inert, essentially anhydrous atmosphere while removing volatile byproducts. The resulting metallopolysilanes contain significant amounts of aluminum, boron, chromium, lanthanum, molybdenum, neodymium, niobium, samarium, tantalum, titanium, tungsten, vanadium, yttrium, or zirconium. Such metallopolysilanes can be prepared with relatively low oxygen levels. These polymers are useful as chemical intermediates to synthesize organosilicon materials or polymers. These polymers are also useful, when fired at high temperatures, to form ceramic materials.

Abstract: An organoalkoxysilane/alumina sol-gel composition and method for its production are disclosed whereby an aluminum alkoxide is hydrolyzed in water to form a sol, to which is added a hydrolyzable organoalkoxysilane of the general formulaR.sub.x Si(OR').sub.4-xwherein R is an organic radical, R' is a low molecular weight alkyl radical, and x is at least 1 and less than 4. The composition is dried and cured to form an organosiloxane/alumina monolith or coating on a substrate.

Abstract: Organoboron nitride polymers are produced by polymerization of organoboron nitride compounds having a cyclic structure of the formula (XBNR).sub.3 wherein R represents hydrogen, a saturated or unsaturated alkyl group or an aryl group and X represents a primary, secondary or tertiary amino group or a silylamino group in the presence of at least one of amine compounds of the formula R.sup.1 NH.sub.2 and amine compounds of the formula R.sup.1 NHR.sup.2 wherein R.sup.1 and R.sup.2 which may be the same or different individually represent an alkyl, aryl or silyl group. The organoboron nitride polymers are suitable as a raw material for the production of boron nitride and as a binder for boron nitride powders.

Abstract: The invention provides a novel means for providing a highly heat-resistant and corrosion-resistant coating film on the surface of a substrate such as a semiconductor silicon wafer or glass plate by coating the surface with a liquid coating composition which is a solution of an oligomeric organopolysiloxane as a partial dehydration-condensation product of a monohydrocarbylsilane triol RSi(OH).sub.3, optionally, with admixture of a dihydrocarbylsilane diol R.sub.2 Si(OH).sub.2, R being a monovalent hydrocarbon group, e.g. methyl or phenyl, in an organic solvent followed by baking of the coated substrate to convert the coating layer into a cured resin film.

Abstract: There is provided a room temperature vulcanizable silicone rubber composition which upon curing to the solid, elastic state exhibits improved adhesion to various substrates, comprising:(a) a polydiorganosiloxane wherein the silicon atom at each polymer chain end has bonded thereto at least two hydrolyzable groups,(b) an effective amount of non-chelate condensation catalyst, and(c) an effective amount of metal chelate adhesion promoter.

Abstract: Polymeric silicon alkoxide solutions are produced and then stabilized by the addition of calcium acetate. The calcium acetate serves to prevent the rapid evaporation of the polymerized silicon solution when applied as a coating to various substrates. Glass fiber substrates are preferred.

Abstract: This invention relates to organosiloxane compositions which have application as protective coatings for soft substrates. The compositions of the invention include a substituent selected from each of the following classes of compositions: organo-alkoxysilanes; polyoxymethylenes; monocarboxylic organic acids; and optionally inorganic hydroxyacids. The coatings formed form these compositions have properties as adhesion promoters and are abrasion resistant.

Abstract: Disclosed is an ungelled resin comprising a compound corresponding to a specified formula (I) which compound typically is prepared by reaction of an aminoalkyloxy silane with an organic isocyanate. The ungelled resin contains a hydrolyzable group that is attached directly to Silicon. The ungelled resin can be utilized in coating compositions. The ungelled resin can be cured with moisture and/or with polyols, and can be used to provide protective and/or decorative films on a variety of substrates.The novel compounds contained in the ungelled resin for convenience can be thought of as prepared from an organic isocyanate having an average functionality of at least 1; a silicon-containing compound corresponding to a specified formula (III) infra, the silicon-containing compound having at least one hydrolyzable group; and a compound containing at least 2 carbon atoms, at least 1 functional group reactive with a moiety on the silicon-containing compound and at least one amino group.

Abstract: Disclosed is a composition containing a novel ungelled resin in combination with an effective amount of a cure-promoting catalyst selected from the group consisting of triflic acid (i.e., trifluoromethane sulfonic acid), a neutralization product of triflic acid with ammonia, a neutralization product of triflic acid with an amine, a tetraalkyl ammonium salt of triflic acid, and mixtures of one or more of the aforesaid catalysts. The composition can be cured with moisture and/or with polyols and can be used to provide protective and/or decorative films on a variety of substrates.The novel ungelled resin comprises a compound corresponding to a specified formula (I) which compound typically is prepared by reaction of an aminoalkyloxy silane with an organic isocyanate. The ungelled resin contains a hydrolyzable group that is attached directly to silicon.

Abstract: Siloxane modified isocyanurate polymers are disclosed which are the reaction product of a siloxane containing polyahl and a polyisocyanate in the presence of a catalyst for a trimerization of the isocyanate to form isocyanurate rings.

Abstract: Compositions curable by radiation e.g. UV radiation are disclosed and claimed which comprise an organosiloxane having at least two siloxane units including groups --RSH, an organosiloxane having at least two siloxane units including ethylcyclohexenyl groups, and a photoinitiator. The compositions cure on exposure to UV radiation and may be used to produce on a variety of substrates coatings which are of reduced odor. Also, disclosed and claimed is a method of treating a substrate which comprises applying a coating of such compositions and irradiating the coating. Examples given refer to production of coatings on paper substrates to provide cured coatings.

Abstract: A moisture curable composition having an improved storage stability comprising a hydrolyzable silyl group-containing vinyl polymer and an orthoacetic acid ester as a stabilizer. The storage stability of the composition containing the hydrolyzable silyl group-containing vinyl polymer, which is curable in the presence of moisture at low temperatures, can be remarkably improved by the presence of the orthoacetic acid ester.

Abstract: Radiation polymerizable compositions containing organopolysiloxanes having an average of at least one nitrogen-containing group per molecule linked to a silicon atom through an Si--N or Si--O--N linkage and a photo-induced free radical source.

Abstract: A novel branched hydrosilyl-modified polycarbosilane which can be pyrolized to obtain improved yields of silicon carbide. This novel branched hydrosilyl-modified polycarbosilane can be prepared in a one-step reaction from mixtures of silane monomers containing vinyl or halomethyl moieties with silane monomers containing hydrosilyl groups.

Abstract: A very simple and versatile method is proposed for the preparation of an aqueous emulsion of silicone in which an organochlorosilane or a mixture of organochlorosilanes is added dropwise into an aqueous medium in the presence of a surface active agent or, preferably, into an aqueous medium containing a surface active agent in advance followed by or with concurrent removal of the hydrogen chloride from the mixture by adding an alkaline neutralizing agent or by use of the techniques of ion exchange so that a stable aqueous emulsion can be produced in the aqueous medium at the same time as the organochlorosilane or silanes are hydrolyzed followed by the dehydration condensation of the resultant silanol compounds to form an organopolysiloxane in situ by the catalytic activity of the hydrogen chloride formed by the hydrolysis.

Abstract: The present invention provides a method for preparing a precious metal catalyzed, heat curable silicon release coating composition. Also, there is provided an article of manufacture for packaging the ingredients necessary to practice the method of the invention.

Abstract: Disclosed are coating compositions containing pigment in a vehicle comprising a dispersion of colloidal silica, a mixture of a hydrolyzable trialkoxysilane and a hydrolyzable dialkoxysilane, alcohol, water and sufficient acidifying agent to provide a pH of the vehicle ranging from about 2.8 to about 6.0.

Abstract: Disclosed are coating compositions containing a vehicle comprising a dispersion of colloidal silica, a hydrolyzable alkoxysilane, an alcohol, water, and an acidifying agent selected from a soluble metal acid phosphate, phosphoric acid, and a mixture thereof.

Abstract: A process for preparing organopolysiloxanes having SiC-bonded organofunctional groups, which comprises reacting an organopolysiloxane containing SiC-bonded hydroxyl and/or alkoxy groups and having an average of about 0.85 to 1.8 SiC-bonded monovalent hydrocarbon radicals or halogenated monovalent hydrocarbon radicals for each Si atom, with an organosilicon compound containing alkoxy groups and/or siloxane oxygen groups and at least one SiC-bonded organofunctional radical per molecule in the presence of an organic solvent and a basic catalyst.The resultant organopolysiloxanes having SiC-bonded organofunctional groups may, for example, be used for preparing modified polymers by copolymerizing the organopolysiloxanes with a monomer containing an aliphatic double bond, such as styrene or hydroxyethyl methacrylate, or by reacting the organopolysiloxanes with an additional polymer such as an epoxy resin.

Abstract: The present invention provides a method for preparing a precious metal catalyzed, heat curable silicon release coating composition. Also, there is provided an article of manufacture for packaging the ingredients necessary to practice the method of the invention.