Abstract: An optical assembly includes an optical device having an optical surface. The optical assembly further includes an encapsulant. The encapsulant substantially covers the optical surface. In some embodiments, the encapsulant is pre-formed.

Abstract: A method of forming an optical article includes the step of applying a silicone composition to a surface, wherein the silicone composition is a solid and has a glass transition temperature greater than room temperature. The silicone composition is heated to a temperature at or above the glass transition temperature such that the silicone composition flows. The silicone composition forms a light transmitting sheet upon cooling following the heating.

Abstract: The present disclosure provides methods of making organosiloxane polymer compositions from hydrosilylation curable compositions comprising at least the components (a) and (b) and at least one of components (c) and (d): (a) an organosiloxane resin material comprising aliphatic unsaturation; and (b) an organosiloxane crosslinker comprising multiple silicon atom-bonded hydrogen atoms (e.g., an “SiH siloxane”); in combination with at least one of (c) at least one organosiloxane comprising at least two silicon atom-bonded hydrogen atoms; and (d) at least one organosiloxane comprising at least two silicon atom-bonded hydrocarbyl groups comprising aliphatic unsaturation (e.g., a “di-vinyl functional siloxane”). Such hydrosilylation curable compositions have, in some instances, significantly faster cure speed, relative to their condensation curable counterparts.

Abstract: Curable compositions of “resin-linear” organosiloxane block copolymers comprising a superbase catalyst are disclosed. The addition of a superbase catalyst to compositions of certain resin-linear organosiloxane block copolymers results in curable compositions having faster cure rates, and improved mechanical strength and/or thermal stability over similar compositions without the superbase catalyst.

Abstract: The present disclosure relates to a method of making an optical assembly. An optical device is secured in a fixture, the optical device having an optical surface, wherein a silicone film is positioned with respect to the optical surface, the silicone film having a distal surface relative to the optical surface. The method includes, among other features, imprinting the distal surface of the silicone film to create a surface imprint in the distal surface of the silicone film.

Abstract: The present invention relates to a hot-meltable curable silicone composition for compression molding or laminating and a laminate provided with at least one layer comprising the composition, as well as a semiconductor device using these and a method of manufacturing the same. In accordance with the present invention, it is possible to efficiently manufacture a semiconductor device provided with a hemi-spheroidal lens- or dome-shaped seal. In the present invention, it is easy to control the shape of the seal, and the seal does not contain any bubbles. In the present invention, it is also easy to control the thickness of the coating layer of the semiconductor device apart from the seal.

Abstract: The various embodiments of the present invention relate to condensation curable silicone compositions comprising: a condensation curable polyorganosiloxane; and treated particles comprising a particulate solid having an effective amount of nitrogen-containing base (e.g., a nitrogen-containing superbase) disposed thereon. Other embodiments of the present invention relate to methods for preparing the aforementioned treated particles; the treated particles themselves; and methods of using the treated particles and compositions of the various embodiments of the present invention.

Abstract: The present disclosure provides hydrosilylation curable compositions comprising resin linear organosiloxane block copolymers comprising, among other things, from about 0.5 to about 5 mole % C1 to C30 hydrocarbyl group comprising at least one aliphatic unsaturated bond. Such hydrosilylation curable resin-linear organosiloxane block copolymers have significantly faster cure speed, relative to their condensation curable counterparts. A faster cure speed can be important for encapsulating electronic devices, such as light-emitting diode (LED) chip devices, particularly devices having tall structures.

Abstract: An optical assembly includes an optical device having an optical surface. The optical assembly further includes an encapsulant that substantially covers the optical surface. The encapsulant has a first layer (106) and a second layer (108). The first layer (106) has a first silicone-containing hot melt composition and a major surface (112). The second layer (108) has a second silicone-containing hot melt composition, the second layer (108) having a second major surface (110) in contact with the first major surface (112).

Abstract: Curable compositions of “resin-linear” organosiloxane block copolymers comprising a nanoparticulate filler are disclosed. In some instances, even at high loading levels, curable and solid compositions comprising “resin linear” organosiloxane block copolymers and a nanoparticulate filler exhibit melt flow and cure behavior. In addition, the nanoparticulate filler present in the curable and solid compositions comprising “resin linear” organosiloxane block copolymers have the effect of significantly in creasing the refractive index of the curable and solid compositions.

Abstract: Methods of making optical assemblies and electronic devices comprising, depositing a solid silicone-containing hot melt composition in powder form onto an optical surface of an optical device; and forming, from the silicone-containing hot melt composition, an encapsulant that substantially covers the optical surface of the optical device. In some embodiments, the silicone containing hot melt composition is a reactive or unreactive silicone-containing hot melt. In some embodiments, the composition is a resin-linear silicone-containing hot melt composition and the composition comprises a phase separated resin-rich phase and a phase separated linear-rich phase.

Abstract: Curable compositions of resin-linear organosiloxane block copolymers that exhibit stress relaxation behavior are disclosed.

Abstract: A process is disclosed for preparing a resin-linear organosiloxane block copolymer by reacting a silanol terminated linear organosiloxane and an organosiloxane resin containing hydrolyzable groups to form a resin-linear organosiloxane block copolymer. The resulting resin-linear organosiloxane block copolymer is then crosslinked to sufficiently increase the average molecular weight of the resin-ituted organosiloxane block copolymer by at least 50%. The resin-linear organosiloxanes block copolymers prepared by the disclosed process may provide optically solid compositions which may be considered as “reprocessable.

Abstract: A process is disclosed for preparing a resin-linear organosiloxane block copolymer. The resin-linear organosiloxanes block copolymers prepared by the disclosed process may provide optically solid compositions which may be considered as “reprocessable”.

Abstract: The present invention relates to a hot-meltable curable silicone composition for compression molding or laminating and a laminate provided with at least one layer comprising the composition, as well as a semiconductor device using these and a method of manufacturing the same. In accordance with the present invention, it is possible to efficiently manufacture a semiconductor device provided with a hemi-spheroidal lens- or dome-shaped seal. In the present invention, it is easy to control the shape of the seal, and the seal does not contain any bubbles. In the present invention, it is also easy to control the thickness of the coating layer of the semiconductor device apart from the seal.

Abstract: Curable compositions of “resin-linear” organosiloxane block copolymers comprising a metal ligand complex are disclosed. The addition of a metal ligand complex to compositions of certain resin-linear organosiloxane block copolymers results in curable compositions having faster cure rates, and improved mechanical strength and/or thermal stability over similar compositions without the metal ligand complex.

Abstract: A method of forming an optical article includes the step of applying a silicone composition to a surface, wherein the silicone composition is a solid and has a glass transition temperature greater than room temperature. The silicone composition is heated to a temperature at or above the glass transition temperature such that the silicone composition flows. The silicone composition forms a light transmitting sheet upon cooling following the heating.

Abstract: Resin-linear organosiloxane block copolymers combined with linear or resin organopolysiloxane components are disclosed. In some embodiments, the combination of resin-linear organosiloxane block copolymers with linear or resin organopolysiloxane components provides compositions having improved physical properties, such as improved toughness and flow behavior.

Abstract: An optical article includes a silicone-containing composition. The silicone composition includes a first region having a first refractive index and a second region having a second refractive index. The first refractive index is different than the second refractive index.

Abstract: A process is disclosed for preparing a resin-linear organosiloxane block copolymer by reacting a linear organosiloxane and an organosiloxane resin to form a resin-linear organosiloxane block copolymer. The resulting resin-linear organosiloxane block copolymer is then crosslinked to increase the average molecular weight of the resin-linear organosiloxane block copolymer. The resin-linear organosiloxanes block copolymers prepared by the disclosed process may provide solid, optically clear compositions which may be considered as “reprocessable.