Abstract: A process comprising the hydrosilation of an aromatic vinyl compound by a hydridochlorosilane compound in the present of platinum or platinum compound and a carboxylic acid. The process favors the formation of the .beta.-adduct of the hydrosilation reaction.

Abstract: The instant invention pertains to a curable composition comprising(a) substance that generates free radicals under the action of ultraviolet radiation and(b) polymer molecule bearing functionality capable of polymerization under the action of said free radicals wherein (a) is a benzoin ether and makes up from 0.001 to 10 wt % of the total composition and (b) has the following formula(R.sub.3 SiO.sub.1/2).sub.a (R'.sub.2 SiO.sub.2/2).sub.b (R"SiO.sub.3/2).sub.c (SiO.sub.4/2).sub.din which R, R', and R" are each H or C.sub.1 to C.sub.10 hydrocarbyl possibly containing a heteroatom and at least 10% is, for example, a vinyl group, and a+b+c+d=1. The composition of the instant invention is a storage-stable UV-curable composition that does not suffer from cure inhibition by air or oxygen, that is very efficiently cured by low doses of UV radiation, and provides a highly heat-resistant cured pattern by heating after pattern formation.

Abstract: There is disclosed a method for preparing a silyl-functional living cationic polymer which can be subsequently coupled to form a moisture-curable telechelic system, said method comprising reacting, in the presence of a Lewis acid,(A) at least one cationically polymerizable monomer with(B) an initiator of the formula ##STR1## wherein R is selected from alkyl groups having 1 to 10 carbon atoms or aryl groups having 6 to 10 carbon atoms, R' is a divalent aliphatic hydrocarbon group having at least 3 carbon atoms, X is halogen, Y is selected from the group consisting of halogen, alkoxy. acyloxy and hydroxyl groups and a is 1, 2 or 3.

Abstract: A method for hydrosilylating a vinyl-substituted aromatic compound comprising reacting a hydrido (hydrocarbonoxy)silane compound with the vinyl-substituted aromatic compound in the presence of a platinum or platinum compound catalyst and a carboxylic acid. The presence of the carboxylic acid increases the positional selectivity of addition in the hydrosilylation reaction and reduces the polymerization of vinyl groups even in the case of a high-temperature or long-term hydrosilylation reaction.

Abstract: A method for forming a low surface energy coating for electrophotographic photosensitive body substrates does not require performing a physical surface reforming treatment such as corona discharge, plasma treatment, and the like. The process comprises: forming on the substrate at least one polysiloxane coating material, (B), that has a water contact angle greater than the water contact angle of the substrate; and thereafter forming an outermost surface coating material, (A), on top of coating material (B). The water contact angle of coating material (B) is smaller than the water contact angle of coating material (A). Coating material (A) comprises finely divided silica and a resin of the formula RSiO.sub.3/2, wherein not less than 1 mol % and not more than 80 mol % of the R groups are fluorohydrocarbon groups of 3 to 12 carbon atoms.

Abstract: This invention relates to a silicone release coating comprising (A) an organopolysiloxane having at least two crosslinkable carbon-carbon double bonds in each molecule, (B) an organopolysiloxane having at least two Si-bonded hydrogen atoms in each molecule, (C) a silylated polymethylsilsesquioxane and (D) platinum catalyst. The silicone release coating compositions of this invention can further comprise an inhibitor. The silicone release coating compositions of this invention do not decline in release resistance due to release paper aging or release liner aging.

Abstract: A method for making a triarylamine having a hydrocarbon oxysilyl group SiOR', where R' is an organic group comprising 1 to 10 carbon atoms, which is important as a hole transfer substance in electronic applications, at a high yield and high position selectivity, comprising reacting a hydrido (hydrocarbonoxy)silane compound with a triarylamine having a vinyl group in the presence of platinum or platinum compound catalyst and a carboxylic acid compound.

Abstract: A method for preparing compounds containing (hydrocarbonoxy)silyl groups by reacting an unsaturated organic compound with a hydrido (hydrocarbonoxy)silane compounds by means of the catalytic action of platinum or a platinum compound in the presence of a carboxylic acid compound.

Abstract: An alkenyl-functional silylated polymethylsilsesquioxane that contains no more than 0.12 residual silanol per Si atom and is obtained by silylating the silanol in starting polymethylsilsesquioxane. The starting polymethylsilsesquioxane has a predetermined number average molecular weight, Mn, from 380 to 2,000 and is represented by the general formula(CH.sub.3 SiO.sub.3/2).sub.n (CH.sub.3 Si(OH)O.sub.2/2).sub.mwherein m and n are positive numbers that provide the predetermined Mn, with the proviso that the value of m/(m+n) is less than or equal to 0.152/(Mn.times.10.sup.-3)+0.10 and greater than or equal to 0.034/(Mn.times.10.sup.-3). The alkenyl-functional silylated polymethylsilsesquioxane has the formula(CH.sub.3 SiO.sub.3/2).sub.n (CH.sub.3 Si(OH)O.sub.2/2).sub.m-k (CH.sub.3 Si(OSiR.sup.1 R.sup.2 R.sup.3)O.sub.2/2).sub.kwherein k is a positive number smaller than A, (m-k/(m+n) is less than or equal to 0.12, and R.sup.1, R.sup.2 and R.sup.

Abstract: A hydrogen-functional silylated polymethylsilsesquioxane that contains no more than 0.12 residual silanol per Si atom and is obtained by silylating the silanol in starting polymethylsilsesquioxane. The starting polymethylsilsesquioxane has a predetermined number average molecular weight, Mn, from 380 to 2,000 and is represented by the general formula(CH.sub.3 SiO.sub.3/2).sub.n (CH.sub.3 Si(OH)O.sub.2/2).sub.mwherein m and n are positive numbers that provide the predetermined Mn, with the proviso that the value of m/(m+n) is less than or equal to 0.152/(Mn.times.10.sup.-3)+0.10 and greater than or equal to 0.034/(Mn.times.10.sup.-3). The hydrogen-functional silylated polymethylsilsesquioxane has the formula(CH.sub.3 SiO.sub.3/2).sub.n (CH.sub.3 Si(OH)O.sub.2/2).sub.m-k (CH.sub.3 Si(OSiR.sup.1 R.sup.2 R.sup.3)O.sub.2/2).sub.kwherein k is a positive number smaller than m, (m-k/(m+n) is less than or equal to 0.12, and R.sup.1, R.sup.2, and R.sup.

Abstract: A process for the preparation of an electrically conductive coating material for use in electrophotography applications comprises subjecting an epoxy-functional silane to hydrolytic condensation in a mixed solvent of alcohol and water in the presence of silica. The hydrolyzed material is then heat cured to form a resin coating comprising (R.sup.1 SiO).sub.3/2 units, where R.sup.1 comprises epoxy-functional groups. The coating has superior optical homogeneity and electrical conductivity without being detrimental to the functionality required of electrophotographic photosensitive bodies.

Abstract: A heat resistant grease composition containing a fluorosilicone base oil, a fluororesin thickener and an additive, that has a reduced gelling, reduced base oil evaporation, and stable heat resistance.

Abstract: A silylated polymethylsilsesquioxane, that contains no more than 0.12 residual silanol per Si atom and has a predetermined number average molecular weight from 380 to 2,000 is obtained by silylating the silanol in a starting polymethylsilsesquioxane with the formula(CH.sub.3 SiO.sub.3/2).sub.n (CH.sub.3 Si(OH)O.sub.2/2).sub.mwherein m and n are positive numbers that provide the specified molecular weight and 0.034/(M.times.10.sup.-3).ltoreq.m/(m+n).ltoreq.0.152/(M.times.10.sup.-3)+ 0.10. The silylated polymethylsilsequioxanes of the present invention exhibit compatibility with silicone polymers, e.g., polydimethylsiloxanes. As a consequence, the silylated polymethylsilsesquioxanes of the invention can be used in a wide range of applications as, for example, a reinforcing filler for rubbers.

Abstract: An optical silica-containing polysiloxane resin comprises colloidal silica and a polysiloxane resin. The polysiloxane resin has the formula RSiO.sub.3/2, where R is selected from the group consisting of hydrocarbon groups of 1 to 4 carbon atoms and fluorohydrocarbon groups of 3 to 10 carbon atoms. The fluorohydrocarbon groups have the general formula C.sub.n F.sub.(2n+1) C.sub.2 H.sub.4 --, where n is an integer of 1 to 8. The optical silica-containing polysiloxane resin has high light transmissivity and high surface hardness, and can be used for optical elements.

Abstract: Curable compositions comprising a substance that produces a base when exposed to radiation and a polymer molecule that contains silicon-hydrogen bonds which react with hydroxyl groups under the action of the base to form silicon-oxygen bonds (Si--O) and hydrogen molecules. These compositions cure when exposed to radiation. A pattern can be formed by placing a mask between a coating of the composition and the radiation source during this exposure episode and thereafter dissolving the uncured composition. The compositions have little weight loss during their cure, they can be cured by low intensity radiation, and they yield heat-resistant cured products.

Abstract: This invention pertains to a curable composition comprising a N-substituted 4-(o-nitrophenyl)dihydropyridine (a compound that generates base under the action of ultraviolet radiation) and a silanol-containing polymer that condenses under the action of the base generated to form a siloxane bond. The compositions of the instant invention cure by exposure to ultraviolet radiation. Cured patterns may be formed from the curable composition by interposing a mask between a film of the said composition and the radiation source during UV exposure, then dissolving and removing the uncured composition to form a pattern, and thereafter heating the residual material. The compositions can be cured by low-strength ultraviolet radiation and produce a highly heat-resistant cured product.

Abstract: A curable polysiloxane of formulaA.sub.a B.sub.b (R.sub.3 SiO.sub.0.5).sub.c (R.sub.2 SiO).sub.d (RSiO.sub.1.5).sub.e (SiO.sub.2).sub.fwhere A and B are silacyclobutane, disilacyclobutane or benzosilacyclobutene functional groups. A composition of matter comprising this polysiloxane and a copper, silver or gold containing catalyst. A method of curing this polysiloxane.

Abstract: A drug formulation for producing sustained therapeutic efficacy, which releases at least one water-soluble drug over a prolonged period of time at a substantially constant rate wherein said drug formulation comprises(a) a nondisintegrating inner layer comprised of a biocompatible material that contains at least one uniformly dispersed water-soluble drug; and(b) an outer layer comprised of a biocompatible material that surrounds the circumference of the said inner layer, is impermeable to water, and is capable of controlling the swelling of the inner layer; wherein the ratio of the axial length of the drug formulation to the cross-sectional diameter of the inner layer is one or more and wherein one or both ends of the inner layer are open so as to come into direct contact with the external environment.

Abstract: The invention provides a method for manufacturing a polysiloxane resin with charge transporting property by uniformly dissolving a charge transporting material to a practical concentration in a polysiloxane resin. The charge transporting material that is dissolved in the polysiloxane resin is an aromatically substituted tertiary amine which has been modified by substitution of one or more of the aromatic groups with a hydrocarbon group containing a silyl group with hydrolyzable substituents.

Abstract: A method of manufacturing solvent-soluble charge transporting materials capable of imparting charge-tranporting properties to polysiloxane resins. These materials have the formula A-?R.sup.1 SiR.sup.2.sub.3-n Q.sub.n !.sub.p where A is a tertiary amine and organic group derived from a compound having charge transporting properties with an ionization potential of 4.5-6.2 eV; R.sup.1 is an alkylene group of 1-18 carbon atoms; R.sup.2 is a monovalent hydrocarbon group or a monovalent halogen-substituted hydrocarbon group of 1-15 carbon atoms; Q is a hydrolyzable group such as--OR.sup.3 where R.sup.3 is an alkyl group of 1-6 carbon atoms; n and p are each 1-3. This silicon-type charge transporting material is characterized by aromatic groups, and alkoxysilyl groups bonded via hydrocarbon groups onto the aromatic rings.