Abstract: A room temperature-curing silicone elastomer composition which has excellent workability before curing and forms a silicone elastomer after curing which exhibits low modulus and high elongation. This composition contains a hydroxyl-capped polydiorganosiloxane, a siloxane chain extender of the formulaR.sup.1 (R.sup.2.sub.n R.sup.3.sub.(3-n) SiO)Si(OR.sup.4).sub.2in which R.sup.1, R.sup.2, and R.sup.3 are aliphatic monovalent hydrocarbon groups, R.sup.4 is a hydrocarbon group having from 1 to 8 carbon atoms per group, and n is 0 or 1, an alkoxysilane crosslinker, and a curing catalyst.

Abstract: This invention includes di- and tri(alkoxysilylalkyl)- or haloalkoxysilylalkylcyclic pentanes, which may have substituents thereon, including vinyl groups, and their use as waterproofing agents, as crosslinking agents in room temperature vulcanizing silicone caulks, in coating compositions and as surface treatments. The cyclic hydrocarbons are pentane (C.sub.s). The silane groups are attached to the ring through an alkyl group, which may have substituents thereon. Multiple silane groups may be attached to the ring. The silanes may have the standard substituents thereon, including alkoxy and halogens.The specific silanes contemplated herein have the following formula:R.sub.a X.sub.3-a Si(CR'.sub.2).sub.n !.sub.b cycloC.sub.5 R".sub.

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

Abstract: A room temperature curable rubber composition of a condensation curing type that comprises as a base polymer a diorganopolysiloxane or a polyoxyalkylene in which both ends of the molecular chain are blocked with a hydrolyzable silyl group, and a carbonyl compound, an amino group containing organic compound, and an .alpha.,.beta.-unsaturated carbonyl compound that are blended with the base polymer. Since the room temperature curable rubber composition is cured with water in the air and at the same time the dehydration condensation of the carbonyl group and the amino group produces water in the composition, the quick curability and deep curability are improved remarkably.

Abstract: A radiation surface-curable RTV silicone composition which subsequent to radiation surface curing thereof, is interiorly moisture-curable in character. Such radiation surface-curable, interiorly moisture-curable RTV silicone composition comprises: a silanol-containing silicone; a silane cross-linker for the silicone, such cross-linker having joined directly to a silicon atom thereof an ethylenically unsaturated functional group and at least two hydrolyzable functional groups; and a photoinitiator effective for radiation surface curing of the silicone composition. Also disclosed is a "liquid potting system" formulation, which is irradiated subsequent to dispensing thereof at the potting locus, so that the radiation surface-cured skin layer overlies and contains (cooperatively with the associated bounding surface(s) of the potting locus) the uncured liquid, so that the potted structure or material is encapsulated in a liquid (damping) medium.

Abstract: Strain-crystallizing poly{methyl(3,3,3-trifluoropropyl)siloxane} elastomers and methods for their making. The process comprises the cross-linking of cis stereoregular polymers prepared by reacting isomers of 1,3,5-trimethyl-1,3,5-tris(3',3',3'-trifluoropropyl)cyclotrisiloxane, where at least 30 percent of the isomers are of cis configuration, in the presence of an aprotic polar promoter and a lithium compound. The lithium compound initiates ring opening and polymerization of the isomers without affecting the steric arrangement of the leomars. Elastomers prepared by cross-linking these cis stereoregular polymers have sufficient cis 3,3,3-trifluoropropyl substitution to allow the elastomers to strain crystallize and provide reinforcement to the elastomers at typical use temperatures.

Abstract: A resin composition comprising a) a high molecular weight compound containing an average of 2 or more hydroxyl groups and an average of 2 or more epoxy groups per molecule and having a number average molecular weight of 3,000 to 200,000; b) a silane compound having an average of 1 or more alkoxysilane, silanol and acyloxysilane groups per molecule and having a number average molecular weight of 104 to 200,000; and c) a metal chelate compound, is curable at a relatively low temperature to yield a film having excellent resistance to weathering.

Abstract: A room temperature vulcanizable composition comprises a diorganopolysiloxane blocked with a silanol group at both ends of the molecular chain, an organopolysiloxane having at least three silanol groups in the molecule, and at least one member selected from the group consisting of organosilanes and organopolysiloxanes each having two hydrolyzable groups in one molecule. The composition ensures easy control of its working life and is able to yield a cured product having a low modulus over a long time.

Abstract: A moisture-curable silicone hot melt pressure sensitive adhesive composition is disclosed, said composition comprising: (A) a solid alkoxy functional organopolysiloxane resin containing curing radicals of the formula --ZSiR.sup.1.sub.x (OR.sup.2).sub.3-x ; wherein R.sup.1 is a monovalent hydrocarbon radical, R.sup.2 is selected from the group consisting of a alkyl radical and alkoxyalkyl radical, Z is a divalent linking radical, and the subscript x has a value of 0 or 1; (B) a diorganopolysiloxane polymer, each terminal group thereof containing at least one silicon-bonded hydrolyzable functional radical selected from the group consisting of alkoxy radicals having 1 to 4 carbon atoms, ketoxime radicals, aminoxy radicals, acetamido radicals, N-methylacetamido radicals and acetoxy radicals; said polymer having a viscosity at 25.degree. C. of 20 to <100,000 mm.sup.

Abstract: A coating composition for carriers which are adapted for use in electrophotography is described. The composition comprises an organopolysiloxane of the following average unit formula (1)R.sup.1.sub.a Si(OR.sup.2).sub.b O.sub.[4-(a+b)]/2 (1)wherein R.sup.1 represents an alkyl group having from 1 to 10 carbon atoms or a phenyl group, R.sup.2 represents a hydrogen atom or an alkyl, alkenyl or alkoxyalkyl group, each having from 1 to 10 carbon atoms for the alkyl and alkenyl and from 2 to 10 carbon atoms for the alkoxyalkyl, a is a value of 0.8.ltoreq.a.ltoreq.1.8, b is a value of 0<b<3, an organosilane of the following general formula (2) serving as a crosslinking agent for the organopolysiloxane(CH.sub.3).sub.2 SiX.sub.2 (2)wherein each X represents an alkenoxy group or oxime having from 2 to 10 carbon atoms, and a curing catalyst for the organopolysiloxane. Carriers having core particles and a cured film of the composition formed on individual particles are also described.

Abstract: A silicone copolymer emulsion comprising:(A) 10 to 90 wt % of a silicone component containing(i) 5 to 60 wt % of compound (a) and(ii) 95 to 40 wt % of a crosslinkable silicone;(B) 90 to 10 wt % of a copolymerizable monomer; and(C) a curing catalyst,said compound (a) being expressed by the following formula (1): ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 denote alkyl, phenyl, (meth)acryloxyalkyl and the like.

Abstract: A curable composition suitable for treating substrates in order to render them oil repellent, water repellent and stain resistant, said composition comprising:(A) a fluorine-containing organosilicon compound having the general formula ##STR1## wherein R.sup.1 denotes a monovalent hydrocarbon group, excluding alkenyl groups, R.sup.2 denotes a divalent organic group, a is 2 or 3, and m is an integer having a value of 4 to 12, or a partial hydrolysis and condensation product thereof, and(B) a catalytic quantity of a condensation-reaction catalyst.

Abstract: A dealcoholation condensation type room temperature curable composition of the present invention comprises (A) a diorganopolysiloxane blocked by mono-, di- or tri-alkoxysilyl group at both terminal ends, (B) an alkoxysilane having the formula (1):R.sup.1.sub.4-n Si(OR.sup.2).sub.n (1)wherein R.sup.1 and R.sup.2 are a monovalent hydrocarbon group and n is 3 or 4, or a partially hydrolyzed product thereof, (C) a titanate ester or a titanium complex and (D) an organosilicon compound having the formula (2): ##STR1## wherein R.sup.3 and R.sup.4 are a hydrogen atom or an alkyl group, R.sup.5 and R.sup.6 are each a monovalent hydrocarbon group, R.sup.7 is an alkyl group or an alkoxyalkyl group, a is 0 or 1 and m is an integer of 0 to 3. The composition is very excellent in shelf stability.

Abstract: Reaction products of titanates with .beta.-dicarbonyl compounds and citrates and their use in one-component RTV silicones.

Abstract: Room temperature curable polymeric composition A room temperature curable polymeric composition comprising (A) at least one hydrolyzable silyl group-containing polymer selected from the group consisting of alkylene oxide polymers blocked by a hydrolyzable silyl group at a terminal end of molecular chain thereof and organopolysiloxanes blocked by a hydrolyzable silyl group at a terminal end of molecular chain thereof, (B) an epoxy compound, (C) a carbonyl group-containing organic compound, (D) an amino group-containing organic compound, and (E) a curing catalyst for the component (A). The composition is excellent in fast-curing property and deep portion curing property, and a cured product obtained therefrom has good rubber properties.

Abstract: Adhesion promoting compositions for bonding a layer of organic polymer to a layer of organosiloxane elastomer during curing of the elastomer by a platinum group metal-catalyzed hydrosilation reaction comprise (a) a copolymer containing repeating units derived from at least one ethylenically unsaturated organic compound and at least one silane containing an ethylenically unsaturated organic group and at least two silicon-bonded hydrolyzable groups per molecule, and (b) an organohydrogensiloxane containing an average of at least three silicon-bonded hydrogen atoms per molecule. If the adhesion promoting composition is to be used with an elastomer prepared by curing an organosiloxane elastomer at temperatures below about 80 degrees C., the adhesion promoting composition includes an alkyl orthosilicate and an organotitanium compound.

Abstract: A silicone composition capable of being cured by both a moisture-curing mechanism and an ultraviolet (UV) curing mechanism is provided. The silicone composition comprises:1 a reactive organosiloxane prepared by a condensation reaction of a silicone (1) represented by the general formula ##STR1## where R.sup.1 and R.sup.2 are each an organo group, and a is a number corresponding to a kinematic viscosity of 25-50,000 cSt, measured at 25.degree. C., with a vinyl ether silane compound represented by the general formula: ##STR2## where m and n are each an integer of 1 to 5, R.sup.3 and R.sup.4 are each an alkyl group having 1 to 3 carbon atoms or allyl, and b is 0 or 1;2 0-70 parts by weight of a silicone oil having trimethylsilyl group as an end group;3 a catalytic amount of a photopolymerization catalyst; and4 a catalytic amount of a silicone moisture-curing catalyst.

Abstract: A room temperature curable composition suitable as top coat and providing coating films having good properties such as surface appearance, gloss, stain resistance, weatherability and adhesion and a small contact angle with water, which comprises (A) an acrylic copolymer having a specific reactive silicon-containing group such as alkoxysilyl group, (B) a specific hydrolyzable silicon compound and/or its partial hydrolysis condensation product, (C) a specific curing catalyst such as an organic carboxylic acid, a combination of an organic carboxylic acid with an organic amine, or an organometallic compound, and (D) an adhesion improving agent such as a silane coupling agent or its reaction product with an epoxy compound.

Abstract: Disclosed is a method of forming high dielectric constant coatings on substrates. The method comprises applying a coating of hydrogen silsesquioxane resin and a high dielectric constant filler onto a substrate and heating the coated substrate at a temperature sufficient to convert the hydrogen silsesquioxane resin to a silica containing ceramic matrix containing the filler.

Abstract: Vulcanizable organopolysiloxane compositions comprise a hydroxy-terminated organopolysiloxane, an acrylic or methacryllc functional alkoxy silane, a divalent tin compound, an alkoxy-.alpha.-silyl ester, a photopolymerization initiator, and a curing catalyst whereby the composition is cured by UV irradiation and/or by the action of moisture in air. The composition has good shelf stability and can yield rubber elastomers having good physical properties.

Abstract: A composition curable to a silicone rubber exhibits adhesion to metal and glass substrates under both dry and wet conditions where the composition contains an alkenyl-containing polydiorganosiloxane, an organohydrogensiloxane, a hydrosilation catalyst containing platinum, an (epoxy-functional organo)trialkoxysilane, an alkoxy-silicon compound, and a titanium compound having Ti--O--CH bonds and the molar amount of alkoxy-silicon compound exceeds the molar amount of (epoxyfunctional organo)trialkoxysilane.

Abstract: The present invention pertains to a curable silicone composition comprised of (A) an organopolysiloxane represented by the formula ##STR1## wherein R.sup.1 is a monovalent hydrocarbon group other than an alkenyl group; R.sup.2 is a monovalent hydrocarbon group other than an alkenyl group or hydrogen; R.sup.3 is an organic group that contains an epoxy group or an alkoxysilylalkyl group with the proviso that at least one R.sup.3 group is an organic group containing an epoxy group; a is either 0 or a positive number; b is a positive number; c is a positive number; a/c has a value of between 0 to 4, b/c has a value of between 0.05 to 4, and (a+b)/c has a value of between 0.2 to 4; and (B) a curing compound selected from curing agents or curing catalysts. The curable silicone composition of the present invention has superior curing properties and is capable of forming a hardened silicone material with superior flexibility and heat resistance after curing.

Abstract: A room temperature curable polyether composition, comprising a polyether compound of which at least one terminal has a group, represented by the general formula (1): ##STR1## wherein R.sup.1 is an alkyl group or an aryl group, R.sup.2 is a hydrogen atom or a monovalent organic group, R.sup.3 is a divalent organic group, X is a hydrogen atom, a halogen atom, a hydroxyl group, an alkoxyl group, an alkenyloxy group, an acyloxy group, a ketoximate group, an amido group, an aminoxy group or a mercapto group and a is an integer of 0 to 2, and of which main chain comprises a fluorine-containing polyether chain, represented by the general formula (2): ##STR2## wherein R.sub.f is a perfluoro group, R.sup.4 is a divalent organic group, m is an integer of 4 or more and n is an integer of 0 or more. The cured product thereof is excellent in rubber properties and is useful as one-part or two-part type elastic sealant.

Abstract: Oligosiloxanes of the formula I ##STR1## where R.sup.1 is a C.sub.1 -C.sub.4 -alkyl andn is from 2 to 50,are chiefly used for fabricating fiber-reinforced composite and ceramic materials.

Abstract: A method of making a polydimethylsiloxane which has both low reactivity endgroups of the formula(R"O)R.sub.2 SiO--where R" is an alkyl group of 1 to 4 carbon atoms, and high reactivity endgroups of the formula ##STR1## in which a polydimethylsiloxane having the high reactivity endgroups is mixed with a hydroxyl terminated polydimethylsiloxane and then a difunctional silane, R.sub.2 SiX.sub.2 where R is methyl or vinyl and X is N-methylacetamido. These polydimethylsiloxanes are useful for making sealants with reduced modulus.

Abstract: Liquid organosilicon compounds containing at least one alkenyl radical per molecule are included as an ingredient of moisture curable organosiloxane compositions containing a liquid polydiorganosiloxane with alkoxysilalkylene terminal units and an organotitanium compound as the curing catalyst. The organosilicon compound reacts with silicon-bonded hydrogen atoms present in said composition, thereby preventing the generation of hydrogen during storage and/or curing of the composition. One source of silicon bonded hydrogen is one of the reactants used to prepare the polydiorganosiloxane.

Abstract: A moisture-curable silicone hot-melt adhesive composition is disclosed, which composition comprises(i) a solid hydroxyl-functional organopolysiloxane resin comprising R.sub.3 SiO.sub.1/2 siloxane units and SiO.sub.4/2 siloxane units in a molar ratio of 0.5/1 to 1.2/1, wherein R is selected from hydrocarbon or halogenated hydrocarbon radicals;(ii) a diorganopolysiloxane polymer having silicon-bonded hydroxyl terminal groups and having a viscosity at 25.degree. C. of 100 to 500,000 centipoise, the weight ratio of said resin (i) to said polymer being (ii) in the range 40:60 to 75:25;(iii) a ketoximosilane, the amount of said ketoximosilane being sufficient to provide a molar ratio of X groups to total hydroxyl groups on said resin (i) and said diorganopolysiloxane (ii) of 0.9 to 3; and(iv) optionally, sufficient catalyst to accelerate the cure of said composition, said composition being an essentially solvent-free non-slump solid at room temperature, being extrudable at .ltoreq.150.degree. C.

Abstract: A primer composition has blended therein an organic silicon compound having in a molecule at least one group of the formula: ##STR1## wherein R.sup.1 is a monovalent hydrocarbon group or a group represented by QSi( R.sup.4 O).sub.a (R.sup.5).sub.3-a, Q is a divalent organic group, R.sup.4 and R.sup.5 each are a monovalent hydrocarbon group, a is an integer of 0 to 3, R.sup.2 and R.sup.3 each are a hydrogen atom or a monovalent hydrocarbon group, and n is 0, 1 or 2. The primer composition is a useful adhesive since it is effective for joining silicone elastomers and similar adherends to supports such as paint coated metals and resins.

Abstract: A room temperature curable organopolysiloxane composition comprising: (A) 100 parts by weight of a diorganopolysiloxane blocked by hydroxyl group at both terminal ends of its molecule, (B) from 0.5 to 30 parts by weight of an organosilicon compound having at least three silicon-bonded hydrolyzable groups in its molecule or a partially hydrolyzed product of the organosilicon compound, (C) from 0.1 to 15 parts by weight of an alkoxysilane having the following general formula (1): ##STR1## wherein R.sup.1 and R.sup.2 are each an unsubstituted or substituted monovalent hydrocarbon group of from 1 to 8 carbon atoms, R.sup.3 is a divalent hydrocarbon group of from 1 to 8 carbon atoms which may contain an amide linkage (--CONH--) or ether oxygen linkage, Rf is a divalent perfluoroalkylene group or a divalent perfluoropolyether group, and n is an integer from 1 to 3, and a cured product of the composition.

Abstract: Bisphosphine oxide monomers and homologs thereof may be incorporated into polycarbonates in order to obtain a flame retardant polymer. More particularly, bis[2,5-(diphenylphosphine oxide)]-1,4-hydroquinone and homologs thereof may be used to prepare flame retardant polycarbonates that retain high glass transition temperature and high impact resistances.

Abstract: Organo(poly)siloxanes with siloxane units at the end of the chain having organyloxy and hydrogen groups are disclosed as well as a process for producing the same by reacting .alpha.,w-dihydroxyorgan(poly)siloxanes with silanes having a group that can be easily separated and their use in organo(poly)siloxane mixtures that can be stored in the absence of water but which can be cross-linked into elastomers at ambient temperature in the presence of water. Also, a process is disclosed for producing organopolysiloxane elastomers by cross-linking cross-linkable mixtures by addition of Si-linked hydrogen to SiC-linked residues with aliphatic carbon-carbon multiple linkage.

Abstract: Polysilanes are produced from hydrosilanes using as a catalyst a mixture of a specific metallocene compound and a specific silyl compound or a mixture of the specific metallocene compound and a specific metallic hydride.This invention can efficiently provide a polymer having a higher degree of polymerization than in case of using a known catalyst.

Abstract: A moisture-curable silicone composition, suitable for use as a coating or pressure-sensitive adhesive, is disclosed, said composition comprising (i) a hydroxyl-functional organopolysiloxane resin comprising R.sub.3 SiO.sub.1/2 siloxane units and SiO.sub.4/2 siloxane units in a molar ratio of 0.5/1 to 1.2/1. respectively, wherein R is a hydrocarbon or halogenated hydrocarbon radical: (ii) a diorganopolysiloxane polymer having at least two silicon-bonded alkoxy groups and at least one carbon-bonded amine group in its molecule, said polymer having a viscosity at 25.degree. C. of 20 to 100,000 centipoise, the weight ratio of said resin to said polymer being in the range 20:80 to 80:20; (iii) optionally, a hydrolyzable silane in sufficient amount to provide stability to said composition; and (iv) optionally, sufficient catalyst to accelerate the cure of said composition.

Abstract: Room temperature curable organopolysiloxane compositions (and the hardened products of such compositions) which comprise (A) a diorganopolysiloxane with hydroxyl groups at both ends, (B) a quaternary functional silane with four groups to be hydrolyzed and/or partially hydrolyzed products thereof, (C) a curing catalyst, (D) a filler, (E) a tertiary functional silane with three groups to be hydrolyzed and/or partially hydrolyzed products thereof and (F) an amine functional silane and/or an addition products with an acrylic acid ester or with a methacrylic acid ester show good adhesiveness towards surface-activated objects which has superior water-resistance.

Abstract: A room-temperature-curable silicone elastomer composition that is highly workable prior to its cure and that cures to give a silicone elastomer having a desirable stiffness is made from a silanol-terminated polydiorganosiloxane, a dialkoxysiloxane of the formula ##STR1## where R.sup.1 represents monovalent hydrocarbon groups and R.sup.2 represents monovalent hydrocarbon groups having 1 to 8 carbon atoms, a tri- or tetra-alkoxysilane, and a curing catalyst.

Abstract: A solvent-free, cold-setting ternary organosiloxane composition is disclosed, which contains (A) liquid organopolysiloxane, (B) a cross-linking agent, and (C) a curing catalyst, said organopolysiloxane (A) being constituted by organosilicon group of X--Si (wherein X represents a hydrogen atom or a monovalent hydrocarbyl group) and functional side chain of OR (wherein R represents a hydrogen atom, a C.sub.1 -C.sub.5 alkyl group or an acyl group), said cross-linking agent (B) being one or more organometallic compounds selected from the group consisting of an organoaluminum compound, an organoboron compound, an organosilicon compound, an organotitanium compound and an organozirconium compound having at least one functional group selected from among an alkoxy group, an acyloxy group and an oxime group, and said curing catalyst (C) being a metal-containing organic compound, with the total contents of the metal elements of the ternary composition being 40% by weight or more in terms of MO.sub.

Abstract: Cyclopentadienyl and/or cyclopentadienylene and/or dicyclopentadienylene-substituted polyorganosiloxanes that are crosslinkable into elastomeric state on exposure to atmospheric oxygen and/or to moisture are well suited, e.g., for adhesive applications in the construction industry and for diverse insulating/coating applications.

Abstract: The invention provides a thermal and addition curable silicone release coating comprising a mixture of an epoxysilicone controlled release additive containing at least one tri- or quadri-functional siloxane unit, a vinyl-functional silicone base polymer, a temperature-dependent hydrosilation inhibitor and an effective hydrosilation catalyst.

Abstract: Silethynylenedisiloxane polymers are described with repeating units represented by --R.sup.1 R.sup.2 SiC.tbd.CSiR.sup.3 R.sup.4 OSiR.sup.5 R.sup.6 O-- where R.sup.1 -R.sup.6 independently represent hydrogen atoms, alkyl groups, aryl groups, or alkenyl groups. The polymers are prepared by reacting a disilylacetylene compound represented by the formula X.sup.1 R.sup.1 R.sup.2 SiC.tbd.CSiR.sup.3 R.sup.4 X.sup.1 and a silane compound represented by the formula X.sup.2.sub.2 SiR.sup.5 R.sup.6 where X.sup.1 and X.sup.2 represent H, OH, OM, or a hydrolyzable group. X.sup.1 and X.sup.2 are not identical and are selected so that they undergo a condensation reaction to form a siloxane bond.

Abstract: A room temperature vulcanizable organopolysiloxane composition comprises (A) a diorganopolysiloxane which is blocked with an alkoxy group at both ends of a molecular chain thereof, (B) a tri or tetraalkoxysilane, (C) a titanium curing catalyst, (D) a silica filler, and (E) an alkoxysilane which is less hydrolyzable than the alkoxysilane of (B). The composition yields a cured product having high strength and high elongation and is low in viscosity and extrusion rate. A method for preparing the composition is also provided in which the ingredients (A) to (D) are first mixed together, to which the ingredient (E) is added.

Abstract: There is disclosed a method for forming a solid, epoxy-functional silicone resin by hydrolyzing and condensing a mixture of at least one organoalkoxysilane and a beta-(3,4-epoxycyclohexyl)-functional trialkoxysilane in the presence of an organotitanate catalyst. The silicone resins prepared according to the instant method find utility in the formulation of powder coatings, either alone or in combination with organic resins.

Abstract: An alkoxy endblocked polydiorgansiloxane of the formulaZ--(SiR.sub.2 O).sub.n SiR.sub.2 --Zwhere Z is ##STR1## where Y isR.sub.a (R'O).sub.(3-a) Si--,X is ##STR2## in which a is 0 or 1, d has a value of 1 to 3 inclusive, v is 0 or 1, n.ltoreq.8, p has a value of 3 to 6 inclusive, q has a value of 2 to 6 inclusive, r has a value of 4 to 6 inclusive, w is 0 or 1, Me is methyl, R.sup.1 is an alkyl radical having from 1 to 6 inclusive carbon atoms, each R is a monovalent radical independently selected from the group consisting of hydrocarbon radicals and halogenated hydrocarbon radicals, R' is an alkyl radical of 1 to 3 inclusive carbon atoms, R" is a divalent hydrocarbon radical selected from the group consisting of --(CH.sub.2).sub.b -- and --CH(Me)(CH.sub.2).sub.

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: Organosilicon compounds with a siloxane portion and groups of the general formula --OR'OCH.dbd.CHR'' (i) linked via an Si--O--C bond, wherein R' is a divalent hydrocarbon radical or a group --R.degree.--(OR.degree.).sub.n --, wherein R.degree. is alkylene and n is from 1 to 12, R'' is H or alkyl are useful in radiation curable compositions, in which they are mixed with an initiator. The compositions are particularly useful in UV radiation curable relase coatings.

Abstract: Compositions which have a long shelf life in the absence of water, but crosslink in the presence of water at room temperature to form elastomers which are prepared by mixing (1) an organopolysiloxane containing condensable terminal groups with (2) an organosilicon compound containing at least three hydrolyzable groups per molecule which are bonded directly to silicon, (3) a condensation catalyst and, optionally, at least one additional substance, in which the condensation catalyst (3), is a reaction product obtained from the reaction of a finely divided, inorganic oxide with a reactive titanium compound.

Abstract: A polydimethylsiloxane which has both low reactivity endgroups and high reactivity endgroups. These polydimethylsiloxanes are useful for making sealants with reduced modulus. An example of these polydimethylsiloxanes is one having low reactivity endgroups of the formulaXR.sub.2 SiO--where X is methoxy or methylethylketoximo, and R is methyl or vinyl and high reactivity endgroups having a formulaY.sub.b R.sub.(3-b) SiO--in which b is 2 or 3, R is methyl radical, and each Y is a hydrolyzable group selected from the group consisting of a ketoximo group and methoxy.

Abstract: The presence of both an organotitanium compound and a microencapsulated platinum-containing hydrosilation catalyst in organosiloxane compositions curable by a hydrosilation reaction not only increases the heat stability of elastomers prepared from the composition, but also unexpectedly increases the cure rate of the compositions. In addition to the platinum-containing and organotitanium co-catalysts the curable compositions comprise an organohydrogenpolysiloxane curing agent and a liquid or high consistency organopolysiloxane containing an average of at least two ethylenically unsaturated hydrocarbon radicals per molecule.

Abstract: A room temperature vulcanizable silicone rubber composition is provided, comprising (A) an organopolysiloxane containing at least one amino group represented by --R.sup.1 NH.sub.2 in a molecule and having a viscosity of from 25 to 500,000 cst at 25.degree. C. wherein R.sup.1 is a divalent C.sub.1-20 hydrocarbon group or a divalent C.sub.1-20 organic group containing an ether bond or --NH-- bond, (B) an organic silicon compound of the formula: OCNR.sup.2 SiR.sub.a.sup.3 X.sub.3-a wherein R.sup.2 has the same meaning as R.sup.1, R.sup.3 is a monovalent C.sub.1-10 hydrocarbon group, X is an alkoxy, ketoxime, alkenyloxy or acyloxy group, and a is 0 or 1, and (C) a curing catalyst. The composition cures at room temperature, providing a product having improved heat resistance, weather resistance and adhesion.

Abstract: A binder for cork chips is provided by an RTV organopolysiloxane composition comprising (1) a diorganopolysiloxane blocked with an alkoxysilyl group at either end of its backbone, (2) a crosslinking agent in the form of an alkoxysilane or a partial hydrolysate thereof, (3) an organic titanate, (4) a network polysiloxane comprising triorganosiloxy and SiO.sub.2 units and having a terminal SiOH group blocked with an alkoxysilyl group, and (5) an epoxy-modified alkoxysilane or a partial hydrolysate thereof. Cork plugs are obtained by mixing the composition with cork chips followed by molding and curing.