Abstract: A housing has a bud portion abutting an elongated stem portion. The bud portion is to fit within an ear. The bud portion has a primary sound outlet at its far end that is to be inserted into an outer ear canal, and abuts the stem portion at its near end. A speaker driver is inside the bud portion. Electronic circuitry inside the housing includes a wireless communications interface to receive audio content over-the-air and in response provides an audio signal to the speaker driver. A rechargeable battery as a power source for the electronic circuitry is located inside a cavity of the stem portion. Other embodiments are also described and claimed.

Abstract: The present invention is directed to solvent free particulated platinum group metal silicone resin catalyst resulting from the spray drying of an organic solvent mixture of a platinum group metal complex, and an alkenyl containing organosiloxane resin. Heat curable organopolysiloxane compositions containing such particulated platinum group metal silicone resin catalyst are also provided.

Abstract: Silicone-polycarbonate block copolymers are provided resulting from the reaction of certain siloxy aromatic imide siloxanes or hydroxyaromatic ester siloxanes which are made by effecting reaction between an organosiloxane having terminal aromatic anhydride groups or aromatic haloacyl groups which are each attached to silicon by silicon arylene linkages with an appropriate bishydroxyarylene compounds or hydroxyarylene amino compound. The aforementioned hydroxyaromatic imide siloxanes or hydroxyaromatic ester siloxanes are then phosgenated with a dihydric phenol or an aromatic bischloroformate. The silicone-polycarbonate block copolymers have been found to be flame retardant and useful as dielectric films and membranes, and as flame retardants in aromatic polycarbonates.

Abstract: Silicon hydrides substituted with oxygen containing radicals such as alkoxy, can be silylformylated with alkynes and carbon monoxide in the presence of a rhodium catalyst to produce silyl alkenyl acetals. The silyl alkenyl acetals are useful as plasticizers for organosilicon copolymers.

Abstract: Silicone copolymers, such as silicone polyimides, silicone polyamides silicone polyesters and silicone polycarbonates are provided having condensed tetraorganodisiloxy groups. These silicone copolymers and anhydride or acylaromatic organic terminated intermediates are crosslinkable by heat or electron beam radiation.

Abstract: Macrocyclic oligomers, including polycarbonates, polyesters, polyamides, polyimides, polyetherketones and polyethersulfones, are conveniently prepared from various spiro(bis)indane compounds, especially the 6,6'-difunctional 3,3',3'-tetramethylspiro(bis)indanes. The macrocyclic oligomers may be conveniently converted to linear polymers.

Abstract: A moisture curable solventless organopolysiloxane composition is provided useful as an adherent construction sealant. Improved cure rate, higher elongation at break values and lower modulus RTVs are achieved by using a bis(ureido)silane as a coupler and an aminoxysiloxane as a crosslinker for a silanol-terminated polydiorganosiloxane base polymer.

Abstract: An improved method for making biaryl compounds is disclosed, in which an aromatic acid halide having at least one strong electron-withdrawing group attached to or within the aromatic ring is reacted with at least one polysilane in the presence of an effective amount of a transition metal catalyst.

Abstract: Linear polyamide and polyimide copolysiloxane compositions are prepared by contacting a strongly acidic catalyst, basic catalyst or alkali metal fluoride with a macrocyclic spirobiindane polyamide or polyimide disiloxane, either alone or in combination with a cyclic polysiloxane such as octamethylcyclotetrasiloxane.

Abstract: Silicone-polycarbonate block copolymers are provided resulting from the reaction of certain siloxy aromatic imide siloxanes or hydroxyaromatic ester siloxanes which are made by effecting reaction between an organosiloxane having terminal aromatic anhydride groups or aromatic haloacyl groups which are each attached to silicon by silicon arylene linkages with an appropriate bishydroxyarylene compounds or hydroxyarylene amino compound. The aforementioned hydroxyaromatic imide siloxanes or hydroxyaromatic ester siloxanes are then phosgenated with a dihydric phenol or an aromatic bischloroformate. The silicone-polycarbonate block copolymers have been found to be flame retardant and useful as dielectric films and membranes, and as flame retardants in aromatic polycarbonates.

Abstract: There is provided by the present invention aromatic polyester-siloxane block copolymers which can be made by effecting the condensation between tetramethyldisiloxane bisbenzoic acid or acid chloride with a dihydric phenol such as bisphenol A or in combination with a mixture of such tetramethyldisiloxane bisbenzoic acid and aromatic acids, such as terephthalic acid or isophthalic acid. The aromatic polyester-siloxane block copolymers can be used as molding compounds, extruded films, in making composite matrix materials and as flame retardants for aromatic polycarbonates.

Abstract: Silicone foams are provided which have increased tensile strength as the result of using an effective amount of a silicone polyimide block copolymer having chemically combined organovinylsiloxy units in the silicone block.

Abstract: A method is provided for silylating aromatic acylhalide by effecting reaction between an aromatic acylhalide and halogenated polysilane in the presence of an effective amount of a supported transition metal catalyst, such as a transition metal catalyst supported by an organic or inorganic substrate.

Abstract: Flame retardant aromatic polycarbonate compositions are provided resulting from the use of certain poly(arylene silicon) materials in combination with aromatic polycarbonates. Included among the poly(arylene silicon) materials are aromatic polyester silioxanes, aromatic polyimide siloxanes and aromatic polysilphenylenes.

Abstract: Polyimidesiloxane coating compositions resulting from the intercondensation in the presence of methylanisole of various dianhydrides such as 2,2-bis[4-(3,4-dicarboxyphenoxy)phenyl]-propane dianhydride or bis(phthalicanhydride)tetramethyldisiloxane, or mixtures thereof with organic diamine such as toluenediamine, aminoalkyl terminated polydimethylsiloxane or oxydianiline.

Abstract: Silicone foams are provided which have increased tensile strength as the result of using an effective amount of a silicone polyimide block copolymer having chemically combined organovinylsiloxy units in the silicone block.

Abstract: Polyimide-siloxanes are provided resulting from the intercondensation of organic diamines with organosiloxanes having terminal silyl-substituted aromatic organic anhydride groups. Semiconductor devices and composites using such polyimidesiloxanes as dielectric or passivating layers, films, adhesives and composites are also provided.

Abstract: Polyimide-siloxanes are provided resulting from the intercondensation of organic diamines with organosiloxanes having terminal silyl-substituted aromatic organic anhydride groups.

Abstract: Macrocyclic oligomers, including polycarbonates, polyesters, polyamides, polyimides, polyetherketones and polyethersulfones, are conveniently prepared from various spiro(bis)indane compounds, especially the 6,6'-difunctional 3,3',3'-tetramethylspiro(bis)indanes. The macrocyclic oligomers may be conveniently converted to linear polymers.