Abstract:
This invention relates to a silicone oil emulsion that contains cross-linked silicone particles in drops of silicone oil which have an average particle diameter of 0.1 to 500 μm and are dispersed in water, wherein the silicone oil contains epoxy groups, acryl groups, methacryl groups, silicon-bonded alkoxy groups, or silicon-bonded hydroxyl groups but is free of silicon-bonded hydrogen atoms and alkenyl groups, said cross-linked silicone particles is formed by a hydrosilation reaction. Furthermore, this invention also relates to a silicone oil composition obtained by removing water from said emulsion.
Abstract:
A composite cured silicone powder comprising: cured silicone powder (A) that has an average particle size of 0.1 to 500 micrometers; an inorganic fine powder (B) coated on the surface of said cured silicone powder (A); and a surface-active agent (C) coated on the surface of said inorganic fine powder (B); a method for producing the composite cured silicone powder which comprises the step of mixing the following components under conditions of mechanical shearing: (A) a cured silicone powder that has an average particle size of 0.1 to 500 micrometers, (B) an inorganic fine powder, and (C) a surface-active agent.
Abstract:
Aqueous suspensions of cross-linked silicone particles comprising: (A) cross-linked silicone particles with an average particle size of from 0.1 to 500 μm, (B) N-acyl-, N-hydrocarbon taurines and/or their salts, and (C) water, aqueous emulsions of oil containing cross-linked silicone particles comprising: (A) cross-linked silicone particles with an average particle size of from 0.1 to 500 μm, (D) oil, (B) N-acyl-, N-hydrocarbon taurines and/or their salts, and (C) water, with component (A) contained in droplets of component (D) dispersed in water, and cosmetic raw materials comprising said aqueous suspensions or said aqueous emulsions. The suspensions and emulsions are characterized by superior stability and by low environmental impact and minimal effects on the human body. In addition, they are extremely useful as cosmetic raw materials because of their superior cosmetics functionality such as wetness and smoothness.
Abstract:
Spherical crosslinked organic particles exhibit a good dispersibility in thermoplastic resins, thermosetting resins, paints, coatings, cosmetics, rubbers, and toners and carriers employed in electrostatic development. Highly efficient methods for preparing these crosslinked organic particles are provided. Suspensions of crosslinked organic particles have excellent handling properties, and are highly blendable with other components. Highly efficient methods for preparing these suspensions are also provided. The spherical crosslinked organic particles have an average particle size of 0.1-500 &mgr;m, and can be prepared by emulsifying in water using an emulsifying agent, a fluid composition containing (A) an organic compound that has at least 2 aliphatically unsaturated bonds in each molecule, (B) a silicon-containing organic compound that has at least 2 silicon-bonded hydrogen atoms in each molecule, (C) an hydrosilylation reaction catalyst, crosslinking the fluid composition by carrying out an hydrosilylation reaction, and thereafter removing water.
Abstract:
A silicone rubber powder obtained by curing a condensation-curable silicone rubber composition in a dispersed state in water, having an epoxy equivalent measured by a titration method equal to or lower than 3,000 and an average particle size in the range of 0.1 to 100 μm; and a method of manufacturing a silicone rubber powder comprising the steps of dispersing in water a silicone rubber composition comprising at least components (A) through (C) listed below; adding component (D); and curing the mixture: (A) a diorganopolysiloxane capped at both molecular terminals with silanol groups and having in one molecule 30 or less silicon atoms; (B) an organopolysiloxane having in one molecule at least two silicon-bonded hydrogen atoms; (C) an epoxy-containing alkoxysilane; and (D) a condensation-reaction catalyst. The silicone rubber powder has low epoxy equivalent and possesses excellent dispersibility in organic resins, and the method is efficient in manufacturing of the aforementioned powder.
Abstract:
A silicone rubber powder obtained by curing a condensation-curable silicone rubber composition in a dispersed state in water, having an epoxy equivalent measured by a titration method equal to or lower than 3,000 and an average particle size in the range of 0.1 to 100 μm; and a method of manufacturing a silicone rubber powder comprising the steps of dispersing in water a silicone rubber composition comprising at least components (A) through (C) listed below; adding component (D); and curing the mixture: (A) a diorganopolysiloxane capped at both molecular terminals with silanol groups and having in one molecule 30 or less silicon atoms; (B) an organopolysiloxane having in one molecule at least two silicon-bonded hydrogen atoms; (C) an epoxy-containing alkoxysilane; and (D) a condensation-reaction catalyst. The silicone rubber powder has low epoxy equivalent and possesses excellent dispersibility in organic resins, and the method is efficient in manufacturing of the aforementioned powder.
Abstract:
An aqueous emulsion comprises as the disperse phase obtained by emulsifying a mixture consisting of (A) a linear organosilicon polymer whose main chain is composed of diorganosiloxane units and alkylene units and (B) an oil that is liquid at room temperature. The emulsion can be produced by emulsifying a mixture of (a) a diorganopolysiloxane having silicon-bonded hydrogen atoms at the two ends of the molecular chain, (b) a diolefin or diorganopolysiloxane having silicon-bonded alkenyl groups at the two ends of the molecular chain, and (c) an oil that is liquid at room temperature and does not contain hydrosilation-reactive groups, in water, and, in this state, component (a) and component (b) are addition-polymerized using (d) a hydrosilation reaction catalyst. Cosmetic materials incorporating such aqueous emulsions possess excellent lubricating properties, good dispersibility, and adherence; a method of preparation of the emulsion; and skin and hair cosmetic materials prepared from the emulsion with excellent sensation of smoothness and moistness to the touch.
Abstract:
Cross-linked silicone particles, which have secondary amino groups represented by general formula: R1NH—R2— (where R1 designates an aryl group or an aralkyl group, and R2 designates a bivalent organic group) bonded to silicon atoms that form the cross-linked silicone particles, demonstrate excellent dispersibility in organic resin and, when added to a curable organic resin composition, improve flowability of the aforementioned composition during molding and produce curable bodies with low modules of elasticity.
Abstract:
An aqueous suspension of cross-linked silicone particles comprising (A) cross-linked silicone particles having an average diameter of 0.1 to 500 μm, (B) polyoxyethylene sorbitan monolaurate, and (C) water. And, in a second embodiment, an aqueous emulsion of cross-linked silicone particles comprising (A) cross-linked silicone particles having an average diameter of 0.1 to 500 μm, (B) polyoxyethylene sorbitan monolaurate, (C) water, and (D) oil.
Abstract:
Water base coating material compositions form coating films of superior flat finish properties. They contain silicone particles with at least two kinds of different average particle size. According to the method of making the composition, a water base coating material composition can be formed by adding an aqueous suspension of silicone particles to a water base coating material composition where the aqueous suspension contains at least two kinds of silicone particles with different average particle size.