Abstract: A compound lens and a related method of manufacture are provided. The compound lens includes a first lens element and a second lens element such that a light emitting surface of the first lens element is integrally joined to a light receiving surface of the second lens element, the first and second lens element being in optical alignment with each other. The first and second lens element are molded from optical grade silicone and can achieve complex illumination objectives not possible with single lens constructions. The method of manufacture includes injecting a silicone resin molding compound into a mold cavity having the desired shape of the compound lens. The method of manufacture can include over-molding a lens holding member onto the compound lens and adding electro-optically active particles to a surface of the compound lens or to the silicone resin forming the compound lens.

Abstract: The invention generally provides a system and method for detecting, measuring, and/or classifying particulate and/or water contaminants in a fluid supply line, storage tank, or sump. Embodiments of the invention provide a contaminant detection apparatus with a detection chamber and a detection module. The detection chamber includes a housing with an internal fluid conduit and one or more acoustic transducers disposed in the housing. Alarms and/or automatic signaling may be included to shut off valves or pumps when contaminants are detected.

Abstract: A copolymer composition is provided that is formed as the reaction product of (I) a cured polyorganosiloxane intermediate having repeating Si—O—Si units and at least one Si—OH functional group and (II) a polyfluoropolyether silane. The cured polyorganosiloxane intermediate has a surface having a water contact angle ranging from 40° to 90° as measured by ASTM 5946-04. In certain embodiments, the copolymer composition provides improved dust resistance as compared with cured polyorganosiloxanes from which the copolymer composition is formed.

Abstract: The invention generally provides a system and method for detecting, measuring, and/or classifying particulate and/or water contaminants in a fluid supply line, storage tank, or sump. Embodiments of the invention provide a contaminant detection apparatus with a detection chamber and a detection module. The detection chamber includes a housing with an internal fluid conduit and one or more acoustic transducers disposed in the housing. Alarms and/or automatic signaling may be included to shut off valves or pumps when contaminants are detected.

Abstract: An opto-physical material comprises a curable matrix composition and an effective amount of an ultraviolet light additive dispersed therein. The opto-physical material has a refractive index ranging from 1 to 1.8 at 589 nm wavelength and a light transmission value of 30% or less at any wavelength in the ultraviolet light spectrum. In addition, a test value of an optical physical property for the opto-physical material does not differ by more than 5% from a predetermined value of the optical physical property when the predetermined value is measured under the same measurement conditions for an opto-physical material comprising a comparative curable matrix composition lacking the ultraviolet light additive, wherein the optical physical property is selected from color shift in the visible light spectrum, light diffusivity at any wavelength in the light spectrum, light transmission in the visible light spectrum, and combinations thereof.

Abstract: An opto-physical material comprises a curable matrix composition and an effective amount of an ultraviolet light additive dispersed therein. The opto-physical material has a refractive index ranging from 1 to 1.8 at 589 nm wavelength and a light transmission value of 30% or less at any wavelength in the ultraviolet light spectrum. In addition, a test value of an optical physical property for the opto-physical material does not differ by more than 5% from a predetermined value of the optical physical property when the predetermined value is measured under the same measurement conditions for an opto-physical material comprising a comparative curable matrix composition lacking the ultraviolet light additive, wherein the optical physical property is selected from color shift in the visible light spectrum, light diffusivity at any wavelength in the light spectrum, light transmission in the visible light spectrum, and combinations thereof.

Abstract: A compound lens and a related method of manufacture are provided. The compound lens includes a first lens element and a second lens element such that a light emitting surface of the first lens element is integrally joined to a light receiving surface of the second lens element, the first and second lens element being in optical alignment with each other. The first and second lens element are molded from optical grade silicone and can achieve complex illumination objectives not possible with single lens constructions. The method of manufacture includes injecting a silicone resin molding compound into a mold cavity having the desired shape of the compound lens. The method of manufacture can include over-molding a lens holding member onto the compound lens and adding electro-optically active particles to a surface of the compound lens or to the silicone resin forming the compound lens.

Abstract: Silicone pressure sensitive compositions that combine high ultimate strength in a cured network with a lower modulus and have improved adhesive strength at elevated temperatures are disclosed. The pressure sensitive adhesive compositions are comprised of (A) a soluble, capped, organopolysiloxane resin containing less than 1.2 weight percent silicon-bonded hydroxyl groups based on the total weight of (A); (B) a diorganopolysiloxane polymer, each terminal group thereof containing at least two silicon-bonded hydrolyzable radicals said polymer having a viscosity at 25.degree. C. of 20 to 100,000 mm.sup.2 /s; and (C) a hydrolyzable silane.

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: A stream of a molten moisture curable organosiloxane composition is entrained in a current of a heated gas containing a concentration of water vapor below the saturation level of the gas at 25.degree. C. The gas current directs the organosiloxane composition toward the surface to be coated and provides an environment adjacent to the surface of the coated substrate that causes at least the surface layer of the composition to cure at a rate that is substantially constant and independent of the temperature and humidity in the macroscopic environment of the substrate.

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: Curable adhesive compositions comprise combinations of organosiloxane MQ resins and liquid polyorganosiloxanes of specified viscosity and functionality. The compositions are substantially free of unreactive materials and are applied in the molten state. Depending upon the concentration of reactive groups on the resin and polyorganosiloxane, the compositions may also include a silane containing an average of more than two hydrolyzable groups per molecule. Preferred compositions develop excellent adhesion to a variety of organic and metallic substrates during curing under ambient conditions.

Abstract: Organosiloxane compositions comprising specified combinations of MQ resins and liquid polyorganosiloxanes can be applied as molten materials to form coatings that are non-flowable under ambient conditions and can initially be remelted by heating the coating above its flow transition temperature. In the presence of moisture, the flow transition temperature of the coating gradually increases due to the reaction of hydrolyzable groups on the polyorganosiloxane ingredient until the coating is converted to a non-flowable resin reinforced elastomer. Preferred coatings are non-transferable at 25.degree. C. within ten minutes following application.

Abstract: This invention provides a single type of electrical connector suitable for use with cables containing from one up to the maximum number of electrical conductors that can be accommodated by passages within the connector without impairing the ability of the connector to exclude moisture and other contaminants from the area occupied by junctions between mating pairs of conductors. This is achieved by the combination of a preformed perforated gasket and a layer of penetrable, non-self-healing, non-flowing elastomer that seals all of the passages in the connector not occupied by conductors.

Abstract: Adding a dye with a visible color to an ultraviolet radiation curable composition which contains a photoinitiator which generates free radicals upon exposure to ultraviolet radiation produces a composition which changes visible color upon exposure to ultraviolet radiation. This visible color change indicates that the composition has cured. This cure indication is useful for compositions curable by ultraviolet radiation in the electronics and electrical industry.

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: The present invention is based on the discovery that a cured organic or organosiloxane gel will enter and flow through a conduit to a dispensing location as a coherent, homogeneous portion of material when (1) one end of the conduit is immersed in the gel (2) a sufficient pressure differential is applied between the surface of the gel and the interior of the conduit to cause the gel to enter and at least partially fill a portion of the conduit, and (3) sufficient pressure is then applied within the conduit to cause the gel to flow in the conduit to at least one dispensing location where the gel is withdrawn from the conduit as an integral, homogeneous stream of material.

Abstract: An apparatus for testing for leaks in individual cavities, such as pin sockets, in a component, such as an electrical connector, in which the pin sockets or other cavities to be tested for leaks extend into the component from a surface of the component is provided. The apparatus of this invention includes resilient surface for sealingly engaging the surface of the component which surrounds the sockets or other cavities. There is provided through the resilient surface a plurality of deformation resistant apertures, which may be, for example, hollow metal tubes, such as hypodermic needles protruding through the resilient surface. The apertures are geometrically arranged to correspond to the arrangement of the cavities so that one aperture is in alignment with the opening of each cavity. Each of the apertures is connected by a conduit to a pressure sensor, which is capable of measuring the rate of pressure decay or leakage out of the test section or cavity.

Abstract: A valve comprising a cylinder with a number of inlet and outlet ports at one end having movable therein a resiliently surfaced piston, wherein the valve is closed by movement of the piston to a position wherein the resilient surface simultaneously closes all of the ports. Means is provided to normally urge the valve toward an open position and closing means which may be highly pressurized air is provided to move the piston to a valve closed position.