Drug – bio-affecting and body treating compositions – Topical body preparation containing solid synthetic organic...
Reexamination Certificate
2002-01-31
2004-06-15
Dodson, Shelley A. (Department: 1616)
Drug, bio-affecting and body treating compositions
Topical body preparation containing solid synthetic organic...
C424S070100, C424S078080, C424S400000, C424S401000
Reexamination Certificate
active
06749843
ABSTRACT:
BACKGROUND OF THE INVENTION
The subject matter of the invention is a cosmetic composition containing an electrical conductive polymer. The composition especially is a hair treatment composition in the form of a shampoo or a hair care composition and reduces the flyaway effect when hair is treated with it.
Freshly washed hair, especially thin hair, is inclined to stand out from the head after drying because of an acquired static charge. This so-called flyaway effect is troublesome. Conventional solutions for this problem involve use of styling agents, such as hair sprays, hair fixing agents or foams, which however have the disadvantage that they fix the hair and limit the natural mobility of the hairstyle. One other solution is the use of quaternarized care materials, e.g. cationic surfactants or cationic polymers, which load the hair and lead to a reduction of the electrostatic charge. Conventional hair-conditioning preparations, such as rinse-off care compositions or leave-on care compositions, are usually formulated as aqueous emulsions. The essential ingredients include cation-active substances, such as cationic surfactants, hydrophobic substances, such as fatty alcohols, and other oily components, emulsifiers, and additional specific active ingredients and perfumes. The most important ingredients are cationic surfactants, fatty alcohols and emulsifiers. A review of the principal ingredients of care rinses and hair care compositions is given by Schrader, “Foundations and Compositions of Cosmetics (Grundlagen und Rezepturen der Kosmetika)”, 2
nd
Edition, 1989, pp. 728 to 737. The principal purposes of the conditioning agents are the improvement of the stylability, the combability, the luster and feel of the treated hair. The application of the cationic care ingredients to the hair however leads to a comparatively heavy burden or loading of the hair as well as the desired effect, because of the comparatively large amount of required care ingredients. Loading of the hair however leads immediately to negative styling properties, especially in the case of fine hair. The treated hair feels heavy and loaded, which is not always desirable.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a cosmetic composition, which has typical hair care properties and especially which reduces the flyaway effect.
It is an additional object of the present invention to provide a cosmetic composition, which at least reduces an impression of the treated hair being heavy and loaded in comparison to hair treated with the conventional hair care compositions.
It is a further object of the present invention to provide a cosmetic composition, which avoids impairing the mobility of the hairstyle in comparison to that obtained by treatment with a conventional styling composition.
It has been surprisingly found that these objects can be attained by cosmetic compositions comprising an electrically conductive polymer.
According to the invention the cosmetic composition contains at least one electrically conductive polymer in a suitable cosmetic foundation.
In order to avoid the above-described flyaway effect without the troublesome side effects obtained by using conventional styling and care ingredients and to reduce the static charge, new intrinsically conductive polymers are used. By applying the hair treatment compositions according to the invention, which contain these polymers, the flyaway effect can be avoided. These polymers are known from other fields of art different from the cosmetic arts. They are used for treatment of surfaces, in order to avoid static charges, e.g. on electronic components or photographic films. They are applied by conventional application methods, such as spraying, pressing or brushing, among others. It has now been found that they may also be worked into a hair treatment composition without difficulty. In the treated hair the flyaway effect is clearly reduced. Only very small amounts of the conductive polymer are required and the hair feels light and not loaded in comparison to the result of treating with a conventional hair care product.
Intrinsically conductive polymers are usually ethylenically unsaturated and conjugated, whereby charge transport is possible in the polymer molecule. This type of polymer is also called an organic metal. They have a conductivity of at least 10
−5
, preferably of at least 10
−2
, especially preferably at least 1, siemens/cm. Suitable intrinsically electrically conductive polymers include, for example, polymeric compounds based on polyaniline, polyanisidine, polydiphenylamine, polyacetylene, polythiophene, polythioprene, polythienylvinylene, bithiophene, polypyrrole and polycroconaine and its derivatives. This sort of polymer is frequently made electrically conductive by doping. The doping can occur chemically or electrochemically. The polymeric compounds are partially oxidized by treatment with an oxidizing agent, such as iodine, sodium peroxydisulfate or bromine or other strong acids and are thus made electrically conductive. Other polymers could be made electrically conductive by partial reduction with a reducing agent. These methods are generally known in the art. The manufacture of intrinsically conductive polyaniline and polypyrrole is described, for example, in EP 0 539 123. Suitable polymer compounds are, e.g., polyradical cations. For increased stability of the formulation it is recommended that the polyradical cations be used in combination polymeric anionic compounds (polyanions) and that the composition does not contain any additional cationic substances, which compete for the counter ions and lead to failures.
The preferred conductive polymeric compounds are conductive polythiophenes, especially conductive polyalkylenedioxythiophene. These polymeric compounds are made by methods described in DE 41 18 704 and EP 0 339 340. 3,4-polyethylenedioxythiophene is especially preferred as the electrically conductive polymeric compound. A suitable commercially available product is Baytron® P of Bayer, an aqueous dispersion with 0.5% by weight of 3,4-polyethylenedioxythiophene (DEPT) and 0.8% by weight polystyrenesulfonate (PSS). Other preferred intrinsically electrically conductive polymers include conductive polyaniline, e.g. Versicon® (Allied Signal), a polyaniline with a conductivity of 2 to 4 S/cm or Ormecon® (Zipperling Kessler & Co.).
The cosmetic compositions according to the invention contain from 0.001 to 5 percent by weight, preferably 0.01 to 1 percent by weight, especially preferably from 0.02 to 0.5 percent by weight, of at least one intrinsically electrically conductive polymer, based on a total amount of the cosmetic composition present.
The cosmetic composition according to the invention is preferably an aqueous or aqueous/alcoholic composition. Lower alcohols suitable for cosmetic purposes having from one to four carbon atoms, e.g. ethanol and isopropanol, are preferred as the alcohols in the aqueous/alcoholic compositions of the invention. The aqueous or aqueous/alcoholic compositions according to the invention contain preferably from 40 to 95 percent by weight, especially preferably from 60 to 90 percent by weight, water. The alcohol content in the composition according to the invention is preferably from 1 to 30, especially preferably from 5 to 20, percent by weight. Also other water-soluble solvents or moisturizing agents, especially multivalent alcohols having from 2 to 4 carbon atoms, such as glycerol, ethylene glycols or propylene glycols, can be included in the cosmetic compositions according to the invention in an amount of from 0.1 to 10 percent by weight, preferably from 0.5 to 5 percent by weight.
At least one non-conductive film-forming synthetic or natural polymer can be contained in the compositions according to the invention in order to fix the electrically conductive polymeric compound on the hair. This additional polymer advantageously has nonionic, anionic or amphoteric character. Cationic polymers can be incompatible with Baytron® P. The additional non-conductive film-
Duchscherer Anja
Krause Thomas
Sendelbach Gerhard
Dodson Shelley A.
Striker Michael J.
Wella Aktiengesellschaft
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