Abstract: A composition contains a mixture of an inorganic binder and alkyl-modified silsesquioxane resin particles, where the alkyl-modified silsesquioxane resin particles are distributed throughout the inorganic binder and have an average particle size in a range of 20 to 200 nanometers as determined by dynamic light scattering.

Abstract: A polyorganosiloxane hot melt adhesive composition includes a polyolefin-polydiorganosiloxane block copolymer, a polydiorganosiloxane, and a polyorganosilicate resin. The hot melt adhesive composition is useful in electronic device assembly processes.

Abstract: A polysiloxane resin-polyolefin copolymer may be prepared using either a hydrosilylation catalyst or a Lewis Acid catalyst. The copolymer may have polyorganosilicate or silsesquioxane resin blocks. The copolymer may have polyethylene or poly(ethylene/octene) blocks.

Abstract: A moisture curable polyorganosiloxane composition is disclosed. The composition comprises: (A) a polyorganosiloxane endblocked with alkoxysilyl-containing groups at both molecular terminals; (B) a polyorganosiloxane resin having a content of OZ in a range of from about 50 mol % to about 150 mol %, wherein each Z is H or an alkyl group such that OZ represents a silanol group and/or a silicon atom-bonded alkoxy group; and (C) a polyorganosiloxane resin having an alkoxysilyl-containing group. The composition exhibits good to excellent coating performance without using a solvent. In addition, the composition can cure by contacting moisture in air to form a cured product exhibiting good to excellent mechanical properties.

Abstract: A curable coating composition is provided having multi-functionalized acrylic copolymer and amino-functional silicone resin curing agents. The acrylic copolymer of the curable coating composition has, in polymerized form, epoxy functionalized groups and cure compatibility groups and the amino-functional silicone resin is an aryloxy-containing amino-functional siloxane, which optionally is derived from sterically hindered alcohol-amine precursor moieties. The coating compositions are useful in the field of superior weatherable and durable coatings and are useful to replace isocyanate-containing polyurethane based coatings. Also provided are coated articles produced from the curable composition.

Abstract: A curable coating composition is provided having multi-functionalized acrylic copolymer and amino-functional silicone resin curing agents. The acrylic copolymer of the curable coating composition has, in polymerized form, epoxy functionalized groups and cure compatibility groups and the amino-functional silicone resin is an alkoxy functional siloxane, which optionally is derived from sterically hindered alcohol-amine precursor moieties. The coating compositions are useful in the field of superior weatherable and durable coatings and are useful to replace isocyanate-containing polyurethane based coatings. Also provided are coated articles produced from the curable composition.

Abstract: A room temperature curable organopolysiloxane composition comprises: (A) an organopolysiloxane having alkoxysilyl-containing groups at both molecular terminals; (B) an organopolysiloxane resin; (C) an alkoxysilane; and (D) a condensation-reaction catalyst. The room temperature curable organopolysiloxane composition exhibits good to excellent storage stability. In addition, the room temperature curable organopolysiloxane composition can form a cured product exhibiting good to excellent mechanical properties.

Abstract: A composition contains a mixture of silyl hydride, a silanols and/or silyl ether, a Lewis acid catalyst and an amine having the following formula: R1R2R3N; where the nitrogen is not a member of an N?C—N linkage and each of R1, R2, and R3 is independently selected from a group consisting of hydrogen, alkyl, substituted alkyl, and conjugated moieties; and wherein at least one of R1, R2 and R3 is a conjugated moiety connected to the nitrogen by a conjugated carbon.

Abstract: A composition contains a mixture of silyl hydride, a siloxane, a Lewis acid catalyst and an amine having the following formula: R1R2R3N; where the nitrogen is not a member of an N?C—N linkage and where each of R1, R2, and R3 is independently selected from a group consisting of hydrogen, alkyl, substituted alkyl, and conjugated moieties; and wherein at least one of R1, R2 and R3 is a conjugated moiety connected to the nitrogen by a conjugated carbon.

Abstract: A composition contains a mixture of silyl hydride, an alpha-beta unsaturated ester, a Lewis acid catalyst and an amine having the following formula: R1R2R3N; where the nitrogen is not a member of an N?C—N linkage and where each of R1, R2, and R3 is independently selected from a group consisting of hydrogen, alkyl, substituted alkyl, and conjugated moieties; and wherein at least one of R1, R2 and R3 is a conjugated moiety connected to the nitrogen by a conjugated carbon.

Abstract: A composition contains a mixture of silyl hydride, an epoxide, a Lewis acid catalyst and an amine having the following formula: R1 R2 R3 N; where the nitrogen (N) is not a member of a N?C—N linkage and wherein each of R1, R2, and R3 is independently selected from a group consisting of hydrogen, alkyl, substituted alkyl, and conjugated moieties; and wherein at least one of R1, R2, and R3 is a conjugated moiety connected to the nitrogen by a conjugated carbon if the epoxide is linear and wherein none of R1, R2, and R3 are connected to the amine nitrogen with a conjugated carbon if the epoxide is a cyclic epoxide.

Abstract: A composition contains (a) a silicon-free mercapto compound comprising 2 or more mercapto groups; (b) a linear polyorganosiloxane containing one or more than one terminally unsaturated alkenyl group, 40 mole-percent or more phenyl groups relative to moles of silicon atoms and at least one alkoxysilyl group per molecule; (c) a resinous polyorganosiloxane containing one or more than one terminally unsaturated alkenyl group and 20 mole-percent or more phenyl groups relative to moles of silicon atoms; (d) a photoinitiator; and (e) a moisture cure catalyst; and wherein the molar ratio of mercapto groups to terminally unsaturated alkenyl groups in the composition is in a range of 0.3 to 2.0.

Abstract: A polyolefin-polydiorganosiloxane block copolymer may be prepared by hydrosilylation reaction.

Abstract: A composition contains: (a) a silicon-free mercapto compound comprising 2 or more mercapto groups; (b) a linear polyorganosiloxane containing one or more than one terminally unsaturated alkenyl group, 40 mole-percent or more phenyl groups relative to moles of silicon atoms and at least one alkoxysilyl group per molecule; (c) a resinous polyorganosiloxane containing one or more than one terminally unsaturated alkenyl group and 20 mole-percent or more phenyl groups relative to moles of silicon atoms; (d) a photoinitiator; and (e) a moisture cure catalyst; and wherein the molar ratio of mercapto groups to terminally unsaturated alkenyl groups in the composition is in a range of 0.3 to 2.0.

Abstract: A method for producing a sealed optical semiconductor device includes: placing inner and outermost layer sealing films on a substrate on which an optical semiconductor element is mounted within a pressure reduction chamber, and reducing the pressure; a step in which the outermost film is heated, and at least the periphery of the outermost film is thermally fused to the surface of the substrate; and a step in which the reduction of pressure is released, and the substrate is sealed by the outermost film and the inner film. The temperature T2 of the substrate when the reduction of pressure is released is a temperature at which the outermost film exhibits a tensile strength of 0.02-0.15 MPa and an elongation at break of 200-450%. The inner film exhibits a loss tangent (tan ?) of 1.6 or more at the temperature T2.

Abstract: An aqueous dispersion containing (meth)acrylate polymer particles and substituted silsesquioxane-based particles dispersed in an aqueous carrier, wherein: (a) the substituted silsesquioxane-based particles have an volume-average size of 5 nanometers or more and at the same time less than 500 nanometers as determined by dynamic light scattering; and (b) the substituted silsesquioxane-based particles are substituted only with one or more than one moiety selected from a group consisting of alkyl, aryl, hydroxyl, trace amounts of alkoxy and combinations thereof and contain 50 mole-percent or less hydroxyl substitution in the form silanol functionalities relative to moles of substituted silsesquioxane-based particle as determined by infrared spectroscopy.

Abstract: A hot melt adhesive composition includes a polyolefin-polydiorganosiloxane block copolymer, a polydiorganosiloxane, and a polyorganosilicate resin. The hot melt adhesive composition is useful in electronic device assembly processes.

Abstract: A method for producing a sealed optical semiconductor device makes it possible to seal an optical semiconductor element using a sealing film. The method includes: placing a sealing film on an optical semiconductor element substrate on which an optical semiconductor element is placed within a pressure reduction chamber, and the pressure within the chamber is reduced; heating the film where at least the periphery of the film is thermally fused to the surface of the optical semiconductor element placement substrate; and a step in which the reduction of pressure within the chamber is released and the optical semiconductor element placement substrate is sealed by the film. The temperature T2 of the optical semiconductor element placement substrate when the reduction of pressure within the chamber is released is a temperature at which the film exhibits a tensile strength of 0.02-0.15 MPa and an elongation at break of 150-450%.

Abstract: A moisture curable polyorganosiloxane composition is disclosed. The composition comprises: (A) a polyorganosiloxane endblocked with alkoxysilyl-containing groups at both molecular terminals; (B) a polyorganosiloxane resin having a content of OZ in a range of from about 50 mol % to about 150 mol %, wherein each Z is H or an alkyl group such that OZ represents a silanol group and/or a silicon atom-bonded alkoxy group; and (C) a polyorganosiloxane resin having an alkoxysilyl-containing group. The composition exhibits good to excellent coating performance without using a solvent. In addition, the composition can cure by contacting moisture in air to form a cured product exhibiting good to excellent mechanical properties.

Abstract: A method for preparing a graft copolymer having a polyolefin backbone and polyorganosiloxane pendant groups can be catalyzed by a Lewis Acid catalyst, Piers-Rubenstzjan catalyst, or hydrosilylation reaction catalyst. The graft copolymer prepared by the method is useful as a thermoplastic elastomer or as a compatibilizer in compositions containing both a polyolefin and a polyorganosiloxane.