Abstract: The present invention provides a cosmetic exhibiting superior feeling to the touch and a superior uniformity using a novel organopolysiloxane. The cosmetic contains a liquid organopolysiloxane having fluidity at 25° C. and having a crosslinked three-dimensional network structure. The aforementioned liquid organopolysiloxane has a loss factor, tan ?, at a shear frequency of 10 Hz, which is 1 or more.

Abstract: This inventive thickener or gellant for oil materials is characterized by comprising (A) an high molecular weight organopolysiloxane that has a polyglycerol structure-containing hydrophilic group Q and that is represented by the following structural formula (1): R3-q(R11)qSi—O—(SiR112—O)n1—(SiR11Q-O)n2—(SiR11L-O)n3—Si(R)11)qR3-q wherein R11 is a monovalent hydrocarbyl group or a hydrogen atom; L is a chain organosiloxane group, n1, n2, and n3 are numbers in the ranges 200?n1?1000, 0?n2?20, and 0?n3?50; R is a group selected from L and Q; q is an integer in the range from 0 to 3; wherein when n2=0, q is an integer in the range from 1 to 3 and at least one R is Q. The thickener or gellant exhibits an excellent compatibility with a variety of oil systems.

Abstract: 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.

Abstract: The present invention provides a cosmetic for hair which is superior in view of a sensation during use, effects of styling and/or conditioning hair after use, and cleansing properties. A sugar alcohol-modified silicone having a specified chemical structure in which a sugar alcohol-modified group and optionally a silylalkyl group having a dendron structure, and/or a long chain hydrocarbon group are possessed in one molecule is blended in a cosmetic for hair.

Abstract: The present invention provides a cosmetic for hair in which smooth combability without a frictional sensation during cleansing and applying to hair, namely during wetting, the aforementioned effects are not lost by a rinsing operation, smooth combability during and after drying the hair is exhibited, a moisturizing feeling on touch is exhibited without stickiness, and a flexible styling sensation is provided to the hair. A co-modified organopolysiloxane having both a specified hydrophilic group and a siloxane dendron structure-containing group is blended in a cosmetic for hair as an essential component.

Abstract: 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.

Abstract: The present invention has an objective to provide a surface treatment agent which is safe with no generation of hydrogen, can be suitably used in a surface treatment of powder(s), exhibits good compatibility with other raw materials of cosmetics, and therefore, can improve a dispersing property and stability of powder(s) contained in a cosmetic, as well as provide a powder which has been subjected to a surface treatment with the aforementioned powder treatment agent, and a cosmetic raw material and a cosmetic which are produced by blending them, exhibit superior storage stability, have a superior outer appearance, and exhibit a superior sensation during use. A sugar alcohol-modified organopolysiloxane having a specified structure is used in the powder treatment.

Abstract: A cosmetic raw material comprising the following components (A), (B), and (C): (A) a specific polyether-modified organopolysiloxane; (B) a chain-form silicone oil that is a liquid at 25° C., does not contain a cyclic structure, and does not contain a resinous structure; and (C) an oil that is a liquid at 30° C. and that characteristically (c1) has at least one hydroxyl group in each molecule, (c2) has from 0 to 3, as the number of moles of addition, oxyethylene units in each molecule, (c3) has an HLB value in the range from 0.1 to 6.0, and (c4) has an average molecular weight in the range from 200 to 7000.

Abstract: This inventive thickener or gellant for oil materials is characterized by comprising (A) an high molecular weight organopolysiloxane that has a polyglycerol structure-containing hydrophilic group Q and that is represented by the following structural formula (1): R3-q(R11)qSi—O—(SiR112—O)n1—(SiR11Q-O)n2—(SiR11L-O)n3—Si(R)11)qR3-q wherein R11 is a monovalent hydrocarbyl group or a hydrogen atom; L is a chain organosiloxane group, n1, n2, and n3 are numbers in the ranges 200?n1?1000, 0?n2?20, and 0?n3?50; R is a group selected from L and Q; q is an integer in the range from 0 to 3; wherein when n2=0, q is an integer in the range from 1 to 3 and at least one R is Q. The thickener or gellant exhibits an excellent compatibility with a variety of oil systems.

Abstract: 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.

Abstract: A novel organopolysiloxane having a hydrophilic group, which can be produced easily and is not susceptible to two-phase separation, sedimentation of unreacted materials or the like after production, while being chemically stable and excellently practical, is disclosed. A method for producing the organopolysiloxane; and uses of the organopolysiloxane are also disclosed. The organopolysiloxane is a co-modified organopolysiloxane which has a group having a siloxane dendron structure and a hydrophilic group.

Abstract: To provide a method of producing a polyoxyalkylene-modified polysiloxane composition that is free of acid-mediated carbon-oxygen bond and silicon-oxygen bond cleavage, that is substantially deodorized and also does not generate odor with elapsed time, and that is therefore well suited for use in cosmetic applications, e.g., for hair cosmetics, skin cosmetics, and so forth. A production method of this invention is characterized by removing the odor-causing substance from a polyoxyalkylene-modified polysiloxane composition that has been synthesized by a hydrosilylation reaction, by subjecting the polyoxyalkylene-modified polysiloxane composition to a hydrolysis treatment in the presence of an acidic inorganic salt that is a solid at 25° C. and gives a specific pH at 25° C. in aqueous solution; for example, potassium hydrogensulfate.