Drug – bio-affecting and body treating compositions – Effervescent or pressurized fluid containing – Organic pressurized fluid
Reexamination Certificate
2002-01-28
2004-05-18
Page, Thurman K. (Department: 1616)
Drug, bio-affecting and body treating compositions
Effervescent or pressurized fluid containing
Organic pressurized fluid
C424S070100, C424S070110, C424S070120, C424S070270, C424S400000, C424S401000, C424SDIG001, C424SDIG002
Reexamination Certificate
active
06737046
ABSTRACT:
BACKGROUND OF THE INVENTION
The object of the invention is a composition for a hair treatment preparation which preferably is in the form of an optically clear, transparent or translucent product and is used as an aerosol foam. In particular, the preparation can be a hair-care preparation usable as a leave-in hair treatment or as a hair rinse. The composition contains certain associative thickeners and propellants and optionally cationic hair-care agents and hydrophilic silicones.
As a rule, common hair-conditioning preparations, such as rinse-off treatments or leave-on treatments, are formulated on the basis of aqueous emulsions. Essential ingredients are cationic substances, for example cationic surfactants, hydrophobic substances, for example fatty alcohols, and other oil components, emulsifiers and other specific active ingredients and perfumes. The most important ingredients are the cationic surfactants, fatty alcohols and emulsifiers. A review of the general make-up of rinsing treatments and hair treatments can be found in Schrader, “Grundlagen und Rezepturen der Kosmetika” [Fundamentals and Formulations of Cosmetics], 2nd edition, 1989, pages 728 to 737. The main function of conditioners is to improve the stylability, combability, luster and feel of the treated hair. The treated hair often feels somewhat heavier and more burdened which is not always desirable. Moreover, the conventional oil-in-water [O/W] hair care emulsions are normally milky-white and opaque. Desirable are products which are in an visually attractive form and clear, transparent or at least translucent. Various forms of clear hair care preparations are known and are described, for example, in E. Flick, “Cosmetic and Toiletry Formulations”, second edition, volume 2, pages 373 ff. The preparation of these clear hair care formulations is based on the use of thickening-type polymers, such as, for example, cellulose derivatives (tradenames Natrosol®, Methocel®), high-molecular-weight chitosan derivatives (tradename Kytamer® PC), complex polysaccharides (commercial names karaya gum, tragacanth, Jaguar® brands, Keltrol® brands) and acrylic acid polymers. The major drawback of all these described clear hair care preparations is that their care effect is so weak that it does not come anywhere near the effect of conventional hair care preparations based on mixtures of fatty alcohols and quaternary surfactants. For this reason, in the marketplace these prior-art clear hair care preparations definitely do not sell as well as the standard treatments.
SUMMARY OF THE INVENTION
It has been found that it is possible, by use of nonionic, amphiphilic associative thickeners, to produce preparations which meet the typical requirements placed on hair conditioners in terms of hair conditioning and which, at the same time, can be in a visually attractive form and confer to the hair a less heavy, less burdened feel than that resulting from treatment with a conventional hair care preparation. It has been found, however, that such preparations are not yet entirely satisfactory in terms of emulsification while they are being worked into the hair. The product does not feel sufficiently substantial, namely the amount of emulsion is too small.
We have now found that these drawbacks can be eliminated by use of a hair treatment composition based on a combination of associative thickeners and propellants commonly used with aerosol foams. The object of the invention is therefore a composition for a hair treatment preparation containing
(A) at least one nonionic, amphiphilic associative thickener in an appropriate cosmetic carrier and
(B) at least one propellant.
The composition of the invention preferably contains additionally at least one hair-care substance (C) containing at least one cationic group and/or at least one hair-care silicone compound (D) with at least one hydrophilic group. The combination of the invention was found to have outstanding foaming properties even without an added surfactant, making the combination particularly well suited for preparing aerosol foam products.
The associative thickener (A) is preferably contained in the composition of the invention in an amount from 0.1 to 5 wt. % and particularly from 0.1 to 2 wt. %. The propellant is preferably present in an amount from 0.05 to 40 wt. % and particularly from 0.2 to 10 wt. %. The cationic substance (C) is preferably contained in the composition of the invention in an amount from 0.01 to 10 wt. % and particularly from 0.1 to 5 wt. %, and the silicone compound (D) preferably in an amount from 0.01 to 10 wt. % and particularly from 0.1 to 5 wt. %.
A hair treatment preparation made with the composition of the invention meets the requirements placed on hair conditioners in terms of the conditioning effect in the best manner and shows improved emulsification during use. After the treatment, the hair, in both the moist and the dry state, is noticeably smoother, and the wet combability is noticeably improved. Surprisingly, we have now found that the thickener makes it possible to incorporate the cationic substances and the said silicone compound without bringing about the negative side effects of the thickener. The technical properties of the preparation of the invention even exceed those of a conventional hair treatment based on an aqueous emulsion of fatty alcohols and quaternary surfactants. Comparative beauty salon tests performed side by side on the same scalp confirmed the better combability and more natural feel of hair treated with the preparation of the invention. The negative, dull feel of hair treated with fatty alcohol/cationic surfactant mixtures is practically eliminated when the preparation of the invention is used. The hair feels lighter and less burdened. Moreover, the combination of the invention in the form of an aerosol foam makes it possible to package the preparation in the form of a visually attractive, clear formulation which in turn permits advantageous packaging in a transparent container, for example one of glass or transparent plastic, for example polyethylene, polypropylene or polyethylene terephthalate. The aerosol foam application form is particularly advantageous for hair treatment. While being worked into the hair, the preparation packaged without the propellant feels less substantive and does not contain sufficient emulsion. Tests run by trained hair dressers have shown that the aerosol foam application form is clearly preferred.
The nonionic, amphiphilic associative thickener (A) is a polymer containing both hydrophilic and hydrophobic groups. Associative thickeners are water-soluble polymers containing surfactant-like hydrophobic constituents which in a hydrophilic and particularly in an aqueous medium are capable of associating, namely interacting, with themselves as wall as with other hydrophobic substances. The resulting associative network causes the medium to thicken or gel. Typically, associative thickeners are prepared by polymerization of polyethylene oxide propolymers and at least difunctional, polycondensable substances, for example isocyanates, whereby monohydric alcohols or diols with large aryl, alkyl or aryl/alkyl groups are incorporated so as to produce the hydrophobic modification. Hence, hydrophobically modified polyalkylene glycols are the preferred associative thickeners. The hydrophilic moiety is thus formed of polyoxyalkylene units, preferably of polyoxyethylene but also polyoxypropylene units or of a mixture thereof. The hydrophobic moiety is preferably formed of hydrocarbon groups, for example long-chain alkyl groups, alkylaryl or arylalkyl groups.
Particularly preferred associative thickeners are hydrophobically modified aminoplast—polyether copolymers. Regarding their structure and preparation, the reader is referred to WO 96/40815. In WO 96/40815 are described water-dispersible or water-soluble copolymers formed as products of an acid-catalyzed polycondensation of an at least difunctional aminoplast monomer, an at least difunctional alkylene polyether and a monofunctional compound with
Abels Wilhelm
Jahedshoar Mehrdad
Schmenger Juergen
Lamm Marina
Page Thurman K.
Wella Aktiengellschaft
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