Drug – bio-affecting and body treating compositions – Effervescent or pressurized fluid containing – Organic pressurized fluid
Reexamination Certificate
1999-08-27
2004-02-10
Krass, Frederick (Department: 1614)
Drug, bio-affecting and body treating compositions
Effervescent or pressurized fluid containing
Organic pressurized fluid
C424S070110, C424S070120, C424S401000, C514S772100, C514S770000, C514S063000, C514S880000
Reexamination Certificate
active
06689340
ABSTRACT:
The invention relates to compositions, such as those for hair styling, packaged in aerosol form and comprising, in a cosmetically acceptable medium, a polycondensate, such as a multiblock polymer, comprising at least one polyurethane and/or polyurea unit, at least one polyol, an organic solvent, and a propellant gas. The invention is also directed towards a process for shaping or maintaining a hairstyle comprising the use of these compositions, as well as to their use for the manufacture of hair products, to maintain or shape the hairstyle.
Fixing of the hairstyle is an important element of styling, i.e., 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, the function of which is to form welds between the hairs, these materials also being known as fixing materials, as a mixture with various cosmetic adjuvants. This 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 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 and formulations of cosmetic compositions can provide a highly satisfactory spraying quality.
Compositions intended for fixing and/or maintaining the hairstyle sometimes have the drawback of adversely affecting the cosmetic properties of the hair. Thus, the hair can become coarse and lose its natural softness. Styling compositions are thus sought which fix and/or maintain the hairstyle well while at the same time affording good cosmetic properties.
Patent DE 195 41 326 discloses styling compositions distributed from an aerosol device, which contain, in an aqueous-alcoholic medium, a polymer containing polyurethane units as fixing polymer, and a propellant. These compositions, which are already satisfactory in terms of fixing of the hairstyle, can, however, be improved in particular as regards the cosmetic properties which they give to the hair while at the same time offering optimum spraying quality.
The inventors have discovered that combining conditioners with a polycondensate containing at least one polyurethane and/or polyurea unit can satisfy the requirements mentioned above.
The subject of the invention is thus a hair composition, which can be applied to the hair using an aerosol device. In one embodiment, the composition comprises, in a cosmetically acceptable medium, in a relative proportion by weight relative to the total weight of the composition:
(i) 0.1 to 20%, inclusive, of a polycondensate comprising at least one sequence chosen from polyurethanes and polyureas,
(ii) 7.5 to 70%, inclusive, of an organic solvent,
(iii) 15 to 85%, inclusive, of a propellant gas, and
(iv) 0.01 to 20%, inclusive, of at least one polyol,
wherein the weight ratio of the propellant gas to the organic solvent is greater than or equal to 1.75:1.
For the purposes of the present invention, the term “polyol” refers to a linear, branched or cyclic, saturated or unsaturated, C
2
to C
14
aliphatic hydrocarbon bearing at least two hydroxyl functional groups, such as on the alkyl chain, as well as polyether polymers of these polyol compounds.
Another subject of the invention relates to a process for shaping or maintaining a hairstyle, comprising the use of the composition of the invention. For example, the composition can be applied to the hair to effect the desired result.
Yet another subject of the invention relates to the use of the composition of the invention for the manufacture of hair compositions, in order to maintain or shape the hairstyle.
Examples of polycondensates comprising at least one polyurethane and/or polyurea compound which are included in the present invention are among the polycondensates 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 a 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. The average size of the polycondensate particles in the dispersion can range from 0.1 to 1 micron (micrometer), inclusive.
By way of example, the polycondensate can be formed by an arrangement of blocks, this arrangement being obtained using:
(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 diols, diamines, polyesterols, and polyetherols.
In certain embodiments, compound (1) can be a linear polyethylene or polypropylene glycol, in particular those which are obtained by 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 ranging from about 600 to 20,000.
Other suitable 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.
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 are 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 can be saturated and are 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. Poly-hydroxylated compounds already containing urea or urethane groups, and natural polyols which can be further modified, for example castor oil and carb
Bremenson Jean-Luc
Sturla Jean-Michel
Finnegan Henderson Farabow Garrett & Dunner LLP
Krass Frederick
L'Oreal (S.A.)
Ostrup Clinton
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