Drug – bio-affecting and body treating compositions – Live hair or scalp treating compositions
Reexamination Certificate
2000-12-13
2002-09-03
Page, Thurman K. (Department: 1615)
Drug, bio-affecting and body treating compositions
Live hair or scalp treating compositions
C424S062000, C424S070110, C424S070160, C424S070130, C424S070170, C424S070210, C424S070220, C424S070270, C424S070190
Reexamination Certificate
active
06444197
ABSTRACT:
The present invention relates to a composition for bleaching keratin fibers, for example, human keratin fibers such as the hair, comprising at least one oxidizing agent and at least one combination of two specific polyurethane polyethers.
Keratin fibers, for example human hair, may be bleached with at least one bleaching composition comprising at least one oxidizing agent. An example of an oxidizing agent typically used is hydrogen peroxide. Other non-limiting examples of oxidizing agents include compounds capable of producing hydrogen peroxide by hydrolysis, such as, for example, urea peroxide and persalts. Non-limiting examples of persalts include persalts chosen from perborates, percarbonates and persulphates.
The at least one bleaching composition may, for example, be in the form of at least one anhydrous product, such as anhydrous products chosen from powders and creams, comprising at least one alkaline compound, for example, compounds chosen from alkaline silicates and amines, and at least one peroxygenated reagent which may be diluted at the time of use with an aqueous hydrogen peroxide composition.
Non-limiting examples of peroxygenated reagents include peroxygenated reagents chosen from ammonium and alkali metal persulphates, perborates and percarbonates.
The bleaching compositions may also, for example, result from mixing, at the time of use, at least one anhydrous powder of peroxygenated reagent with at least one aqueous composition comprising at least one alkaline compound and at least one aqueous composition comprising hydrogen peroxide.
Bleaching compositions can also be in the form of ready-to-use thickened aqueous hydrogen peroxide compositions.
As used herein, “ready-to-use composition” refers to compositions intended to be applied in an unmodified form to the keratin fibers. These compositions may include, for example, compositions that can be stored in an unmodified form before use and compositions that can result from mixing at least two compositions at the time of use.
At least one thickener, such as, for example, thickeners chosen from crosslinked polyacrylic acid, hydroxyethylcelluloses, certain polyurethanes, and waxes, may be used to localize the bleaching product to the application to the hair in order for it not to run down the face or beyond the areas which it is proposed to bleach. Also, in the case of aqueous bleaching compositions, mixtures of at least one nonionic surfactant with an HLB (Hydrophilic Lipophilic Balance) value, can give rise to a gelling effect when the at least one non-ionic surfactant is suitably chosen and diluted with at least one diluent chosen from water and surfactants.
However, it has been found that the thickening systems mentioned above may produce bleaching results that may not be sufficiently powerful and homogeneous. Such systems may also leave the hair coarse.
Moreover, it has been found that ready-to-use bleaching compositions comprising the at least one oxidizing agent and also the thickener systems of the prior art may not allow a sufficiently precise application without running, and may fall in viscosity over time.
However, the inventors have discovered that it is possible to obtain ready-to-use bleaching compositions which do not run and thus remain satisfactorily localized at the point of application. These compositions also make it possible to obtain powerful and homogeneous bleaching results while at the same time leaving the hair less coarse.
The present invention therefore relates to a ready-to-use composition for bleaching keratin fibers, for example, human keratin fibers such as the hair, comprising, in a medium appropriate for bleaching, at least one (“at least one” is used in its normal sense to denote one or more) oxidizing agent, wherein said composition also comprises at least one combination of at least:
one polyurethane polyether (a) which can be obtained by polycondensation of at least three compounds comprising (i) at least one polyethylene glycol generally comprising from 50 to 500 mol of ethylene oxide, (ii) at least one C
8
-C
30
fatty alcohol, and (iii) at least one diisocyanate and,
one polyurethane polyether (b) which can be obtained by polycondensation of at least three compounds comprising (i) at least one polyethylene glycol generally comprising from 50 to 500 mol of ethylene oxide, (ii) at least one C
8
-C
30
fatty alcohol other than that of the at least one polyurethane polyether (a), and (iii) at least one diisocyanate.
In one embodiment, the at least one polyurethane polyether (a) and the at least one polyurethane polyether (b) can be used, wherein the at least one polyethylene glycol is chosen from polyethylene glycols generally comprising 150 and 180 mol of ethylene oxide. In addition, the at least one polyurethane polyether (a) and the at least one polyurethane polyether (b) can be, for example, combined with saccharide such as maltodextrin. As a further example, the at least one polyurethane polyether (a) and the at least one polyurethane polyether (b) can be used wherein the at least one diisocyanate is methylenebis(4-cyclohexyl isocyanate).
Another embodiment of the invention includes bleaching compositions as defined above, wherein at least one polyurethane polyether (a) is obtained by polycondensation of at least three compounds chosen from compounds comprising at least one polyethylene glycol chosen from polyethylene glycols generally comprising 150 and 180 mol of ethylene oxide, stearyl (C18) alcohol and methylenebis(4-cyclohexyl isocyanate), and at least one polyurethane polyether (b) is obtained by polycondensation of at least three compounds -chosen from compounds comprising at least one polyethylene glycol chosen from polyethylene glycols generally comprising 150 and 180 mol of ethylene oxide, decyl (C10) alcohol and methylenebis(4-cyclohexyl isocyanate).
Among the at least one polyurethane polyether (a), mention may be made of the product sold by the company Rohm & Haas under the trade name: Aculyn 46, which is a polycondensate comprising, as elements, at least one polyethylene glycol chosen from polyethylene glycols generally comprising 150 and 180 mol of ethylene oxide, stearyl alcohol and methylenebis(4-cyclohexyl isocyanate) (SMDI), at 15% by weight in a matrix of maltodextrin (4%) and water (81%).
Among the at least one polyurethane polyether (b), mention may be made of the product sold by the company Rohm & Haas under the trade name: Aculyn 44, which is a polycondensate comprising, as elements, at least one polyethylene glycol chosen from polyethylene glycols generally comprising 150 and 180 mol of ethylene oxide, decyl alcohol and methylenebis(4-cyclohexyl isocyanate) (SMDI), at 35% by weight in a mixture of propylene glycol (39%) and water (26%).
According to the present invention, when the ready-to-use composition results from the mixing of several compositions at the time of use, the combination of the at least one polyurethane polyether (a) and the at least one polyurethane polyether (b) may be present in at least one of the mixed compositions.
As a result, the combination of the at least one polyurethane polyether (a) and the at least one polyurethane polyether (b) may be present in an anhydrous composition in the form of powder, for example, a pulverulent powder.
The combination of the at least one polyurethane polyether (a) and the at least one polyurethane polyether (b) may additionally be present, for example, in the form of a cream.
According to the present invention, the combination of the at least one polyurethane polyether (a) and the at least one polyurethane polyether (b) may be present in at least one aqueous composition which may be mixed at the time of use with an anhydrous composition in a form chosen from powders and creams containing at least one oxidizing agent.
In an embodiment of the invention, at least one aqueous composition is mixed with at least one anhydrous composition comprising hydrogen peroxide.
The invention is also directed towards a process for bleaching keratin fibers, for example, human keratin fibers such as the hair, us
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Howard S.
L'Oreal (S.A.)
Page Thurman K.
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