Dow Corning Toray Company, Ltd.

Dupont Toray Specialty Materials Kabushiki Kaisha

Dow Corning Corporation

Dow Toray Co., Ltd.

Dow Conring Toray Co., Ltd.

Dow Corning Toray., Ltd.

Ddp Specialty Electronic Materials US 9, LLC

Akito Hayashi

Tomohiro Iimura

Haruhiko Furukawa

Seiki Tamura

Tatsuo Souda

Akihiko Kobayashi

Michitaka Suto

Kazuhiro Nishijima

Sayuri Sawayama

Takashi Sagawa

Shunya Takeuchi

Sawako Inagaki

Seiji Hori

Maki Itoh

Yusuke Miyamoto

Gunn Jo

Sawako Horie

Tomohiro Ilmura

Hidetoshi Kondo

Jina Chon

Min-Hee Kwon

A curable silicone composition is capable of forming a cured product having excellent elongation characteristics. The curable silicone composition, comprises: (A) a resinous alkenyl group-containing organopolysiloxane containing less than two alkenyl groups per molecule on average, which is represented by average unit formula (I):

Curable silicone composition, encapsulant and optical semiconductor device

A curable silicone composition encapsulates, coats, or adheres an optical semiconductor element. The curable silicone composition can form a cured product with sufficiently low gas-permeability, and with little weight decrease and little change in hardness even on long-term exposure to high temperatures. The curable silicone composition comprises resinous organopolysiloxane that contains at least one (ArSiO) unit, wherein Ar denotes an aryl group.

Curable silicone composition, optical semiconductor device and a method of manufacturing the same

A curable hot-melt silicone composition exhibits excellent mechanical properties, particularly strength and extension, even when formed in a film or sheet shape. The curable hot-melt silicone composition contains (A) alkenyl group-containing organopolysiloxane having at least 2 alkenyl groups per molecule, (B) branched organohydrogenpolysiloxane having at least 2 silicon-bonded hydrogen atoms per molecule, at 0.1 to 5% by mass relative to the total mass of the composition, (C) additive represented by average unit formula (C-1), (D) hydrosilylation catalyst, and (E) silica.

Curable hotmelt silicone composition, encapsulant, film and optical semiconductor device

A curable silicone composition is disclosed. The curable silicone composition comprises: (A) a linear organopolysiloxane having at least two silicon atom-bonded alkenyl groups per molecule, wherein at least 5 mole % of all silicon atom-bonded organic groups are aryl groups; (B) an organopolysiloxane containing siloxane units represented by the general formula RSiOwhere each Rrepresents an independently selected monovalent hydrocarbon group, and siloxane units represented by the general formula SiO, wherein the amount of alkenyl groups is at least 6% by weight; (C) an organopolysiloxane having at least two silicon atom-bonded hydrogen atoms per molecule; and (D) a hydrosilylation reaction catalyst. The curable silicone composition forms a cured product with little weight reduction, little change in hardness, and little crack generation after thermal aging.

Curable silicone composition, cured product thereof, and optical semiconductor device

A co-modified organopolysiloxane having a viscosity at 25&#xb0; C. of not more than 1,500 mPa&#xb7;s, a group that has a siloxane dendron structure, a hydrophilic group, and expressed by the following general formula (1): RRLQSiO(1). The invention also relates to a powder treatment agent, a powder in oil dispersion, an external use preparation (particularly a cosmetic composition) composition comprising the co-modified organopolysiloxane. In said general formula (1), Ris a monovalent hydrocarbon group or a hydrogen atom; Ris a monovalent hydrocarbon group having from 6 to 30 carbons; Lis a silylalkyl group having a siloxane dendron structure; and Q is a hydrophilic segment.

Co-modified organopolysiloxane, and treatment agent and external use preparation comprising the same

The present invention provides a novel organopolysiloxane in which a rich hydrophilic property is exhibited, not only superior miscibility with a hydrophilic component and but also a hydrophobic property are exhibited, and superior miscibility with both a silicone oil and a non-silicone oil such as a hydrocarbon oil, an ester oil or the like, and provide various usages of the aforementioned novel organopolysiloxane by developing the superior characteristics thereof such as good surface activity power, a distinctive sensation during use, increased stability and the like. A co-modified organopolysiloxane having a specified chemical structure in which a sugar alcohol-modified group and a long-chain hydrocarbon group are present in one molecule is produced. The co-modified organopolysiloxane is blended, as a surfactant, a powder treatment agent, a gelling agent or the like, or as a cosmetic raw material appropriately together with powder(s), oil agent(s) or the like, in a preparation for external use, and in particular, a cosmetic.

Organopolysiloxane and powder treatment agent, preparation for external use and cosmetic comprising the same

A curable silicone composition comprising: (A) an organopolysiloxane represented by the average unit formula: (RSiO)(RSiO)(RSiO)(Rare alkyl groups, alkenyl groups, aryl groups, or aralkyl groups; Rare alkyl groups or alkenyl groups; Ris an alkyl group, aryl group, or an aralkyl group, provided that, in a molecule, at least 0.5 mol % of Rto Rare the alkenyl groups, at least one of Ris the aryl group or the aralkyl group; and x, y and z are numbers satisfying: 0.01&#x2264;x&#x2264;0.5, 0.01&#x2264;y&#x2264;0.4, 0.1&#x2264;z&#x2264;0.9, and x+y+z=1); (B) a straight-chain organopolysiloxane having at least two alkenyl groups in a molecule; (C) an organopolysiloxane having at least two silicon atom-bonded hydrogen atoms in a molecule; and (D) a hydrosilylation reaction catalyst. A cured product exhibiting excellent dispersibility of phosphor and having crack resistance is formed.

Curable silicone composition, cured product therefrom, and optical semiconductor device

The present invention relates to a curable silicone composition comprising: (A) an organopolysiloxane represented by the average unit formula: (RSiO)(RSiO)(RSiO)(RSiO), wherein, Rare the same or different alkyl groups having from 1 to 12 carbons, alkenyl groups having from 2 to 12 carbons, aryl groups having from 6 to 20 carbons, or aralkyl groups having from 7 to 20 carbons, provided that at least two Rin a molecule are the alkenyl groups; Ris an aryl group having from 6 to 20 carbons or an aralkyl group having from 7 to 20 carbons; Ris an alkyl group having from 1 to 12 carbons; and a, b, c, and d are respectively numbers satisfying: 0.01&#x2266;a&#x2266;0.5, 0&#x2266;b&#x2266;0.7, 0.01&#x2266;c&#x3c;0.7, 0.1&#x2266;d&#x3c;0.9, and a+b+c+d=1; (B) a linear organopolysiloxane having at least two silicon-bonded alkenyl groups and at least one silicon-bonded aryl group in a molecule; (C) an organopolysiloxane having at least two silicon-bonded hydrogen atoms in a molecule; (D) a hydrosilylation-reaction catalyst. The curable silicone composition has excellent handling/workability and forming a cured product with a high refractive index and low gas permeability when cured.

A surface treatment agent or a powder treatment agent comprising a co-modified organopolysiloxane is disclosed. The co-modified organopolysiloxane is represented by the general formula: RRQSiO. The co-modified organopolysiloxane has a number average molecular weight of less than 4500 and includes a long-chain alkyl group and a polyoxyalkylene group in the molecule.

Treatment agent and cosmetic composition comprising co-modified organopolysiloxane

The present invention provides a curable silicone composition for forming a cured product which inhibits the discoloration of silver electrodes or a silver-plated substrate in an optical semiconductor device due to a sulfur-containing gas, the curable silicone composition comprising: (A) an organopolysiloxane having at least two silicon-bonded alkenyl groups per molecule; (B) an organohydrogenpolysiloxane having at least two silicon-bonded hydrogen atoms per molecule; (C) an organic compound having an organic value of at least 175 in an organic conceptual diagram and having a specific group; and (D) a hydrosilylation reaction catalyst. In addition, the present invention provides an optical semiconductor device in which silver electrodes or a silver-plated substrate of an optical semiconductor device is sealed or covered with a cured product of the composition described above, the optical semiconductor device having excellent reliability after a sulfur resistance test.

Curable silicone composition, and optical semiconductor device

Problem: To provide a novel copolymer capable of use as a surface treatment agent which is safe and does not generate hydrogen, which has good compatibility with other cosmetic raw materials so as to be able to improve compounding stability of a cosmetic, which contributes to good water resistance, sebum resistance, gloss, feel, hair attachment ability, skin attachment ability and the like of a cosmetic, which further may be used for treatment of powders of a wide range of cosmetics, and which nearly entirely suppresses the occurrence of dispersion failure on the skin. Resolution Means: A copolymer comprising: (A) an unsaturated monomer having a carbosiloxane dendrimer structure; and A content of the unsaturated monomer having the carbosiloxane dendrimer structure is in the range of 35 to 50% by mass of the total monomer units of the copolymer. The present invention is also a liquid composition, surface treatment agent, and powder composition including such a copolymer, as well as a cosmetic raw material containing such components.

Copolymer having carbosiloxane dendrimer structure and hydrophilic group

A curable silicone composition comprising: (A) an organopolysiloxane represented by the average unit formula: (RSiO)(RSiO)(RSiO)(Rare alkyl groups, alkenyl groups, aryl groups, or aralkyl groups; Rare alkyl groups or alkenyl groups; Ris an alkyl group, aryl group, or an aralkyl group, provided that, in a molecule, at least 0.5 mol % of Rto Rare the alkenyl groups, at least one of Ris the aryl group or the aralkyl group; and a, b, and c are numbers satisfying: 0.01&#x2266;a&#x2266;0.5, 0.4&#x2266;b&#x2266;0.8, 0.01&#x2266;c&#x2266;0.5, and a+b+c=1); (B) an organopolysiloxane that is different from component (A); (C) an organopolysiloxane having at least two silicon atom-bonded hydrogen atoms in a molecule; and (D) a hydrosilylation reaction catalyst. A cured product exhibiting excellent dispersibility of phosphor and having high strength and gas barrier properties is formed.

An excellent oil-thickening or -gelling agent is provided. The agent is compatible with various oils and can freely control the form or viscosity of oily raw materials or cosmetics by changing the quantity thereof added. The agent contains a novel co-modified organopolysiloxane that contains both a group having a siloxane dendron structure and a hydrophilic group and that preferably has a degree of polymerization of 200 or more. A gel composition containing the co-modified organopolysiloxane is also provided. The gel composition is useful as a base that permits stable and easy preparation of cosmetics having various viscoelasticities and forms. An oil is kept in the form of a gel that has a viscoelasticity falling within the intermediate range between the viscoelasticity of liquid and that of solid. Cosmetics containing the thickening or gelling agent are also provided.

Thickening or gelling agent for oily raw materials

The present invention provides a co-modified organopolysiloxane having a specified chemical structure in which a sugar alcohol-modified group and a silylalkyl group having a siloxane dendron structure, and optionally a long-chain hydrocarbon group are present. The co-modified organopolysiloxane is blended, as a surfactant, a powder treatment agent, a gelling agent or the like, or as a cosmetic raw material together with powder (s), oil agent (s) or the like, in a preparation for external use, and in particular, a cosmetic.

Organopolysiloxane and use thereof as surfactant, powder treatment agent, thickening agent of oil-based raw material or gelling agent. gel and emulsion compositions, as well as, preparations for external use and cosmetics comprising the same

A co-modified organopolysiloxane having a group having a siloxane dendron structure and a group containing a saccharide component (e.g. a sugar lactone amide alkyl group) is disclosed. The present invention also provides a method for producing the co-modified organopolysiloxane, as well as a surface treatment agent, a powder treatment agent, a powder composition, a powder-in-oil dispersion, a preparation for external use, and the like containing the co-modified organopolysiloxane.

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Ichihara, Japan

Akito Hayashi