Drug – bio-affecting and body treating compositions – Effervescent or pressurized fluid containing – Organic pressurized fluid
Reexamination Certificate
1999-08-27
2002-12-17
Krass, Frederick (Department: 1614)
Drug, bio-affecting and body treating compositions
Effervescent or pressurized fluid containing
Organic pressurized fluid
C424S070110, C424S401000, C424S070120, C424S047000, C514S772100, C514S063000, C514S770000, C514S880000
Reexamination Certificate
active
06495119
ABSTRACT:
The invention relates to aerosol devices comprising a container which contains, in a cosmetically acceptable medium, a polycondensate, such as a multiblock polymer, comprising at least one polyurethane and/or polyurea unit. The devices can further comprise at least one polyol, an organic solvent, and a propellant gas. The devices are suitable for obtaining an initial flow rate of aerosol composition of less than or equal to 0.75 gram per second. The invention is also directed toward a process for shaping or maintaining a hairstyle, comprising the use of these devices, as well as their use for the manufacture of lacquers or aerosol sprays.
Fixing of the hairstyle is an important element of styling which can comprise maintaining the shape already given or in shaping the hair and fixing it simultaneously.
Hair products for shaping and/or maintaining the hairstyle which are the most common on the cosmetics market are spray compositions comprising a solution, usually an alcoholic or aqueous solution, and one or more materials, generally polymer resins (also known as fixing materials), the function of which is to form welds between the hairs. The solution also often includes various cosmetic adjuvants. The solution can be packaged, for example, in a suitable aerosol container placed under pressure using a propellant. The construction and operation of such aerosol containers is well known to those skilled in the art.
The packaging in aerosol form is especially practical for the user, who obtains fairly homogeneous distribution of the product without difficulty. However, this type of packaging has the drawback of giving rise to a release of volatile organic compounds (VOCs) that are harmful to the environment. They originate in particular from the amount of organic solvent used and of propellant gas chosen to manufacture the composition. Manufacturers thus are in search of cosmetic compositions which can be packaged in aerosol form and which expel very low amounts of volatile organic compounds.
The quality of the spraying obtained by means of an aerosol device, i.e., essentially the distribution of the droplets in space at the nozzle outlet, can depend on the chemical constitution of the composition used. A great amount of attention is thus given to the preparation of aerosol devices which give rise to an optimum spraying quality.
Patent DE 195 41 326 discloses the preparation of styling compositions comprising a polymer containing polyurethane units as fixing polymer. However, the devices can be improved in particular as regards the cosmetic properties which they give to the hair, while at the same time offering better spraying quality.
The inventors have discovered that it is possible to prepare aerosol devices which satisfy the requirements expressed above by choosing the proper combination of a composition (e.g., a hair styling composition) and a means for distributing this composition.
The subject of the invention is thus an aerosol device comprising 1) a container containing a composition, such as a hair styling composition, where the composition is formed of a fluid and at least one propellant, and 2) a means for distributing the composition. The aerosol device is characterized in that:
(1) the composition comprises, in a cosmetically acceptable medium, at least one polycondensate comprising at least one sequence chosen from polyurethanes and polyureas; and
(2) the device is suitable for giving an initial flow rate of aerosol composition of less than or equal to 0.75 gram per second.
Another subject of the invention relates to a process for shaping or maintaining a hairstyle, comprising the use of this aerosol device.
Yet another subject of the invention relates to the use of this device for the manufacture of a lacquer or an aerosol spray.
Examples of polycondensates comprising at least one polyurethane and/or polyurea compound according to the present invention include those described in patents EP 0,751,162, EP 0,637,600, FR 2,743,297, and EP 0,648,485, all assigned to the present assignee, as well as patents EP 0,656,021 and WO 94/03510 from the company BASF, and EP 0,619,111 from the company National Starch. The disclosures of all of these documents are specifically incorporated herein by reference.
The polycondensates used in accordance with the invention can be soluble in the cosmetically acceptable medium, in particular after neutralization with an organic or inorganic base, or alternatively can form a dispersion in this medium. In the latter case, the dispersion can generally comprise at least 0.05% of surfactant, which allows the polycondensate to form a dispersion and to be maintained in dispersion.
According to the invention, any type of surfactant can be used in the dispersion, including a nonionic surfactant. In embodiments, the average size of the polycondensate particles in the dispersion is between 0.1 and 1 micron (micrometer), inclusive.
By way of example, the polycondensate can be formed by an arrangement of blocks, this arrangement being obtained in particular from:
(1) at least one compound which contains at least two active hydrogen atoms per molecule;
(2) at least one diol containing at least one functional group chosen from acid radicals and salts thereof; and
(3) at least one isocyanate chosen from di- and polyisocyanates. Compound (1) can be chosen from the group comprising diols, diamines, polyesterols, polyetherols, and mixtures thereof.
In certain embodiments, compound (1) can be a linear polyethylene or polypropylene glycol, in particular those which are obtained by a reaction of ethylene oxide or propylene oxide with water or diethylene or dipropylene glycol in the presence of sodium hydroxide as catalyst. These polyglycols generally have a molecular weight of between about 600 and 20,000.
In embodiments, the organic compounds are those which have mercapto, amino, carboxyl, or hydroxyl groups. Among these, mention may be made more particularly of polyhydroxy compounds such as polyether diols, polyester diols, polyacetal diols, polyamide diols, polyesterpolyamide diols, poly(alkylene ether) diols, polythioether diols, and polycarbonate diols.
The polyether diols can be, for example, the condensation products of ethylene oxide, of propylene oxide, or of tetrahydrofuran, their copolymerization or condensation products, which may be grafted or blocks, such as mixtures of condensates of ethylene oxide and propylene oxide, and the products of polymerization of olefins, at high pressure, with alkylene oxide condensates. Suitable polyethers can be prepared, for example, by condensation of alkylene oxides and polyhydric alcohols, such as ethylene glycol, 1,2-propylene glycol, and 1,4-butanediol.
The polyester diols, polyesteramides, and polyamide diols are, in embodiments, saturated and can be obtained, for example, from the reaction of saturated or unsaturated polycarboxylic acids with polyhydric alcohols, diamines, or polyamines. Adipic acid, succinic acid, phthalic acid, terephthalic acid, and maleic acid can be used, for example, to prepare these compounds. Polyhydric alcohols that are suitable for preparing the polyesters include, for example, ethylene glycol, 1,2-propylene glycol, 1,4-butanediol, neopentyl glycol, and hexanediol. Amino alcohols, for example ethanolamine, can also be used. Diamines that are suitable for preparing the polyesteramides include, but are not limited to, ethylenediamine and hexamethylenediamine.
Suitable polyacetals can be prepared, for example, from 1,4-butanediol or from hexanediol and from formaldehyde. Suitable polythioethers can be prepared, for example, by condensation reaction between thioglycols, either alone or in combination with other glycols such as ethylene glycol, 1,2-propylene glycol or with other polyhydroxylated compounds. Polyhydroxylated compounds already containing urea or urethane groups, and natural polyols, which can be further modified, for example castor oil and carbohydrates, can also be used.
In certain embodiments, compound (1) is a polyesterol, in particular a polyester diol formed by the reac
Bremenson Jean-Luc
Le Bourhis François
Sturla Jean-Michel
Vilbert Arnaud
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Krass Frederick
L'Oreal (S.A.)
Ostrup Clinton
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