Abstract:
A method of manufacturing a purified product of a liquid medium-chain alkyl-modified polydimethylsiloxane that is free of a specific (unpleasant) odor and is practically odorless, the method comprising the steps of: [A] synthesizing a liquid medium-chain alkyl-modified polydimethylsiloxane by carrying out a hydrosilylation reaction between a hydrosilyl-containing polydimethylsiloxane and an ±-olefin with 4 to 18 carbon atoms; and [B] subjecting a crude product of the liquid medium-chain alkyl-modified polydimethylsiloxane obtained in preceding step [A] to an odor-removing treatment by conducting a hydrogenation reaction which is carried out in the presence of a hydrogenation catalyst.
Abstract:
The invention relates to an optically transparent polyol-in-oil-composition, wherein the composition comprises a) ‰¥ 40 weight-% and ‰¤ 90 weight-% of at least one low molecular weight polyol, b) ‰¥ 1,0 weight-% and ‰¤ 25 weight-% of at least one cosmetic or therapeutic active, c) ‰¥ 1,0 weight-% and ‰¤ 10 weight-% of at least one polyether-free emulsifier d) ‰¥ 2,0 weight-% and ‰¤ 25 weight-% of at least one oil component, wherein the emulsion comprises emulsifier coated droplets in a size range of ‰¥ 20 nm and ‰¤ 1000.
Abstract:
The invention relates to a process for preparing a double emulsion of a hydrophobic and liposoluble active ingredient, which comprises the following steps: (a) an aqueous solution of at least one whey protein is provided; (b) an aqueous solution of at least one anionic polysaccharide is provided; (c) the whey protein(s) is (are) subjected to a denaturing treatment; (d) an o/w emulsion of the active ingredient in the solution (c) is prepared under hot conditions, then an (o/w)/w emulsion of the o/w emulsion in the solution (b) is prepared under hot conditions, or (e) a w/w emulsion of the solutions (c) and (b) is prepared, then an o/(w/w) emulsion of the active ingredient in the w/w emulsion is prepared under hot conditions. It also relates to the production of particles of said active ingredient from an emulsion thus prepared, and to the particles obtained.
Abstract:
A cosmetic composition comprising a first emulsion and a second emulsion and optionally one or more additional emulsions, each of said two or more emulsions being discretely contained within the composition and comprising an inner phase and an outer phase, each of said two or more emulsions being independently a water-in-oil emulsion, an oil-in-water emulsion, an oil-in-oil emulsion, a polyol-in-oil emulsion, a water-in-silicone emulsion, a silicone-in-water emulsion, or a polyol-in-silicone emulsion in physical contact with at least one other emulsion, at least one of said two or more emulsions being visually distinct from the others, and each of said two or more emulsions as well as said composition being independently both physically and visually stable within the composition for at least six months at ambient temperature.
Abstract:
The invention relates to oil-in-water (O/W) emulsions which comprise: an oil phase (phase A), consisting of one, optionally more, substantially water-insoluble component(s), an aqueous phase (phase B), comprising optionally additional water-soluble components such as organic compounds such as alcohols, carboxylic acids or other compounds, pyrogenic silicic acid arranged on the oil-water interface and partially silylated in such a manner that the content in the non-silylated surface silanol groups on the silicon dioxide surface ranges between a maximum of 95 % and a minimum of 50 % of the starting silicon dioxide, equivalent to 1.7 to 0.9 SiOH groups per nm2 of the silicic acid surface, the dispersion content of the surface energy gamma-s-D ranging from 30 to 80 mJ/m2, and the specific BET surface area ranging from 30 to 500 m2/g, an electrolyte content in the aqueous phase which is adjusted in such a way that the ionic strength I of the solution is greater 10-6 mol/l, whereby the ionic strength is defined as I = ½*Σci*zi2, wherein ci is the concentration of the ion i in the solution, and zi is the charge of the ion i, the average particle size of the dispersed phase, i.e. the average droplet diameter, measured by laser diffraction, ranges from 0.5 µm to 500 µm, and optionally additional substances such as pigments or preservatives.
Abstract:
The invention relates to double emulsions, in particular double emulsions of the water-in-oil-in-water type, which are organoleptically similar to full-fat oil in water emulsions and which are stabilised by mixture of emulsifiers. The invention also relates to a method for producing said double emulsions, and to the use of a mixture of emulsifier for stabilising said emulsions.
Abstract:
The invention concerns the use to assist in deposition of an emulsion on a surface, of at least a block copolymer comprising at least a non-ionic hydrophobic block and at least a cationic block in conditions of use of said emulsion.