Dow Toray Co., Ltd.

Norihisa Kishimoto

Hiroshi Fukui

Kyoko Toyama

Seiji Hori

Hiroshi Ueki

Yasue Kanzaki

Sayuri Kikunaga

An organopolysiloxane is provided. The organopolysiloxane is represented by a general formula. In the general formula, Rare the same or different aliphatic unsaturated monovalent hydrocarbon groups having 2 to 12 carbon atoms, Rs are the same or different monovalent hydrocarbon groups having 1 to 12 carbon atoms and not having an aliphatic unsaturated bond, Rs are the same or different alkyl groups having 1 to 3 carbon atoms, 'n' is an integer of from 1 and 500, and “a” is 0 or 1. A thermally conductive silicone composition having the organopolysiloxane as a component is also provided. The organopolysiloxane can be used as a surface treatment agent for a thermally conductive filler. The organopolysiloxane provides for favorable handling/workability of compositions even if such compositions are highly loaded with a thermally conductive filler.

Organopolysiloxane, method of producing the same, and thermally conductive silicone composition

Provided is a curable organopolysiloxane composition for forming a film, which has low viscosity before curing, has excellent mechanical strength and dielectric breakdown strength after curing, and can provide a uniform and thin organopolysiloxane cured film. The curable organopolysiloxane composition comprises: a curing reactive organopolysiloxane, a curing agent, (D1) reinforcing fine particles having a BET specific surface area exceeding 100 m/g, which have been surface treated with an organic silicon compound, and (D2) reinforcing fine particles having a BET specific surface area within a range of 10 to 100 m/g, which have been surface treated with an organic silicon compound. The mass ratio of components (D1) and (D2) is within a range of 50:50 to 99:1, and the sum of components (D1) and (D2) is within a range of 10 to 40 mass %. A method of manufacturing an organopolysiloxane cured film using the curable organopolysiloxane composition is also provided.

Curable organopolysiloxane composition for forming films, and method for producing organopolysiloxane cured film

A treatment agent for a cosmetic powder is provided. The treatment agent contains a reactive organosiloxane represented by the following general formula (1) as a main ingredient: In general formula (1): each Ris independently an alkyl group having 1 to 30 carbon atoms; each Ris independently an alkyl group having 1 to 20 carbon atoms; Ris a divalent alkylene group; n is an integer of 1 to 200; and p is an integer of 1 to 3. The treatment agent for a cosmetic powder of this disclosure is capable of imparting excellent lipophilicity. A cosmetic raw material having cosmetic effect and giving an excellent feeling of use, and a cosmetic are also provided.

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Chiba, Japan

Norihisa Kishimoto