Abstract: Linear triorganosiloxy-terminated polydiorganosiloxanes having a silanol content of less than about 200 ppm are prepared by condensing linear higher molecular weight polydiorganopolysiloxanediols having one Si-bonded hydroxyl group in each terminal unit and a silanol content of preferably greater than about 1000, in two separate stages, one using a fixed bed of a solid form of a conventional equilibration catalyst, and the other using a condensation/disproportionation catalyst, e.g., a phosphonitrilic halide or an oligomer thereof or a reaction product thereof with water, an alcohol, an acid, or a siloxane or silane, until the polydiorganosiloxane has reached the desired low content of silanol groups, e.g., below 200 ppm, by weight. The two stages can be carried out in either order, and a conventional monofunctional chain terminating agent can be present in either or both stages. The process preferably does not increase the cyclic byproduct content.

Abstract: Organofunctional siloxanes useful in a wide variety of personal care and plastics applications are disclosed having a carboxyalkylaminoalkyl functionality.

Abstract: A condensation curing type room temperature curable organopolysiloxane composition, comprising (A) a diorganopolysiloxane the both ends of the molecular chain of which are terminated with a hydroxyl group, (B) an organosilicon compound containing at least three hydrolyzable groups bonded to a silicon atom in the molecule or its partial hydrolysis-condensation product, (C) an alkoxysilane having a fluorine-containing organic group, and (D) aluminum hydroxide. This composition can form a cured product excellent in soil resistance and can keep favorably the tracking resistance for a long period of time. Particularly, the composition is quite useful as a protective coating material for high voltage power supply parts used outdoors.

Abstract: Novel organopolysiloxanes having one silanol group within a molecule and the method for manufacturing them at high purity and high yield. The organopolysiloxanes having a silanol group are expressed by the formula (1) below: ##STR1## wherein R.sup.1 is a monovalent hydrocarbon group with 1 to 8 carbon atoms, each of R.sup.2, R.sup.3 and R.sup.4 is a monovalent hydrocarbon group with 1 to 8 carbon atoms or a siloxyl group expressed by --OSiR.sup.5 R.sup.7, wherein R.sup.5, R.sup.6 and R.sup.7 are monovalent hydrocarbon groups with 1 to 8 carbon atoms, Y is either a hydrogen atom, a halogen atom, or a monovalent hydrocarbon group with 1 to 12 carbon atoms, n is an integer of from 0 to 12, and a is either 0 or 1, with the proviso that the grouping Y--(CH.sub.2).sub.n --Si does not includes H--Si, CH.sub.3 --Si or a hydrolyzable silyl group.

Abstract: The present invention relates to a silicone pressure-sensitive adhesive composition which cure upon exposure to ambient moisture. The moisture-curable silicone pressure-sensitive adhesive composition of the instant invention comprise:(A) an organopolysiloxane resin containing curing radicals of the formula --SiY.sub.2 ZNY'ZSiR.sup.1.sub.x Y".sub.3-x wherein R.sup.1 is a monovalent hydrocarbon radical, each Z is a divalent linking group, each Y is independently selected from the group consisting of a monovalent organic radical, an enoloxy radical, an alkoxy radical, and an oximo radical; Y' is selected from the group consisting of a monovalent organic radical, a hydrogen atom, and --ZSiR.sup.1.sub.x Y".sub.

Abstract: The novel organosiloxane compounds of the present invention are characterized by the presence of 1) a silicon atom containing at least two alkoxy or other hydrolyzable groups and the group --OR.sup.1 Si.dbd. wherein R.sup.1 represents a divalent organic group comprising carbon, hydrogen, and, optionally, oxygen, and 2) a silicon bonded hydrogen atom or alkenyl radical. A preferred method for preparing the compounds is by the reaction of 1) a silane containing a silicon-bonded alkenyloxy group and at least two silicon-bonded hydrolyzable groups or a precursor of said hydrolyzable groups and 2) an organohydrogensiloxane. The reaction is conducted in the presence of a hydrosilation catalyst.

Abstract: Described herein is a primer composition which comprises a solution or dispersion of: (a) about 2 percent to about 30 percent by weight of a film-forming resin; (b) about 2 percent to about 80 percent by weight of a reaction product of an epoxy silane and an amino silane, wherein the amino silane contains at least two amine groups per molecule, which is prepared by (1) contacting an amino silane and epoxy silane in amounts such that the molar ratio of epoxy silane to amino silane in the reaction mixture is less than about 1.8:1.0 and then (2) adding additional epoxy silane to the reaction mixture so that the molar ratio of epoxy silane to amino silane is at least about 2:1 in a volatile solvent. Described herein is also a method of bonding a vehicle window to a vehicle window flange using the primer composition and a urethane adhesive.

Abstract: Several method is of preparing formed spherical polymeric complexes of metals of the 8th subgroup of the periodic system with ligands of an organosiloxane copolycondensate optionally cross-linked by means of cross-linking agents containing Si, Ti, Zr and/or Al (statistical, block-shaped or mixed) with special posttreatment stages are described.

Abstract: Heat curable primerless silicone compositions are provided comprising an aqueous/organic solvent silicone dispersion in combination with an adhesion promoter, such as acrylate or methacrylate ester, for example, a caprolactone acrylate or methacrylate adhesion promoter. Composites of a thermoplastic substrate, such as a polycarbonate, and the thermally cured primerless silicone compositions are also provided.

Abstract: A siloxane modified polyimide resin having high heat resistance and processability is prepared by reacting a siloxane diamine of formula (1) and an aromatic diamine of formula (2) with an aromatic tetracarboxylic dianhydride of formula (3) in a polar solvent. ##STR1## wherein, R represents ##STR2## R.sub.1 and R.sub.2 represent aromatic or aliphatic hydrocarbons; n represents an integer of 1 to 1000;X.sub.1 represents ##STR3## X.sub.

Abstract: The present invention relates to a series of novel silicone phospholipid polymers which are highly lubricious, produce high levels of copious foam, have low irritation properties and are film formers when applied to hair and skin. The compounds, because they are based upon terminal dimethicone copoylols make flat polymers when phosphated and derivatized. As will become apparent, the polymers of the present invention will orientate themselves into planar sheets, silicone on one side of the plane, fatty portion on the other side in aqueous and other solutions. These flat polymers have the unexpected property of producing non-occlusive films when applied to hair skin and fiber.

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: 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: The present invention provides a relatively simple synthesis procedure for the formation of silane hydrolyzate compositions of the formula ##EQU1## where R is hydrogen or a methyl group, n is an integer greater than about 8, and x is a number between 0 and 2. The hydrolyzate compositions are metastable in solvent solution, but become insoluble after coating on a substrate. The resins are useful as planarizing coatings for substrates such as electronic devices and can be ceramified by subjecting them to an oxidizing atmosphere at a temperature of between about 100.degree. to 1000.degree. C. to form ceramic or ceramic-like coatings on such substrates.

Abstract: Flame retardant graft organopolysiloxane-polycarbonate copolymers are provided which can be made by effecting addition between a silicon-hydride siloxane and an aliphatically unsaturated substituted bisphenol followed by phosgenation of the resulting adduct. Alternatively, direct addition of the silicon-hydride siloxane onto an aliphatically unsaturated substituted polycarbonate backbone also can be effected.

Abstract: Phenol-organopolysiloxane chainstoppers are phosgenated in combination with a bisphenol to make flame retardant organopolysiloxane-polycarbonate triblock copolymers. The phenol-organopolysiloxane chainstoppers can be made by effecting addition between an aliphatically unsaturated phenol and a silicon-hydride organopolysiloxane.

Abstract: Linear and cyclic diorganopolysiloxanes containing thioalkyl (meth)acrylate functional groups bonded via an SiC linkage to the polysiloxane backbone are crosslinkable under the influence of UV or an electron beam, and thus are well suited, e.g., for the sheathing of optical fibers.