Aerosol spray

Details Aerosol spray Aerosol spray

2002-08-26

2004-05-04

Page, Thurman K. (Department: 1616)

Drug, bio-affecting and body treating compositions

Effervescent or pressurized fluid containing

Organic pressurized fluid

C424S070100, C424S070900, C424S070220, C424S070230, C424S070310, C424S400000, C424S401000, C424SDIG001, C514S787000

Reexamination Certificate

active

06730290

ABSTRACT:

BACKGROUND OF THE INVENTION
The invention relates to a preparation for treating keratinous fibers, in particular human hair, in the form of an aerosol spray and to the use of this preparation for treating keratinous fibers, in particular human hair.
Keratinous fibers, in particular human hair, are subjected to a large number of treatments nowadays. The treatments, which are used for permanent or temporary styling of the hair, play an important part. Temporary styling which should give a good hold without impairing the healthy appearance of the hair, for example its shine, may be achieved, for example, by hairsprays, hair waxes, blow-dried waves etc.
Hair sprays usually contain synthetic polymers as the styling component. Preparations containing a dissolved or dispersed polymer may be applied to the hair by means of propellant gases or by a pump mechanism. A satisfactorily uniform distribution of the polymer over the hair is generally achieved in the process; application from spray or pump containers is simple and clean.
As the styling component, hair waxes generally contain vegetable, animal or mineral waxes and are sold as solid formulations, generally in pots. For application these products are firstly rubbed in the hand and then distributed over the hair. These hair waxes based on natural raw materials produce a good hold of the hair, simultaneously conferring a strong shine. Nevertheless, commercially available hair waxes cannot yet completely satisfy the user's wish for simple application and easy distribution over the hair. Rubbing on the hand necessitates either the use of gloves or subsequent intensive cleaning of the hands to remove the greasy feel of product residues. Furthermore, very uniform distribution of the product over the hair may only be achieved with difficulty and is very time-consuming.
Finally, there are also so-called shine sprays on the market. These may convey a particular shine, in particular to human hair, owing to their content of vegetable, mineral and/or synthetic oils. As the conventional synthetic and natural film-forming substances in these oils are practically insoluble, these shine sprays have no styling properties. The possibility of incorporating film-forming substances into shine sprays with the aid of solvents, for example large amounts of ethanol, does not lead to satisfactory results, as the additional styling properties may only be achieved at the cost of a significantly worse shine and feel.
SUMMARY OF THE INVENTION
It has now surprisingly been found that the waxes used in hair waxes may also be formulated and used as aerosol sprays. The product may therefore be applied to the hair much more easily and uniformly than conventional solid formulations. Furthermore there were no problems with respect to blockage of the nozzle by the wax components even when the spray cans were completely emptied. The problem of “greasy hands” after application of the product is also completely eliminated.
DETAILED DESCRIPTION OF THE INVENTION
The present invention therefore relates to preparations for treating keratinous fibers, in particular human hair, for spraying in the form of an aerosol spray, characterized in that they contain
at least one wax with a melting point in a range of 40° C. to 90° C.
at least one emulsifier and
at least one propellant
The first essential component of the preparations according to the invention is a wax with a melting point in a range of 40 to 90° C. In principle any physiologically acceptable waxes may be used which melt in the above-mentioned temperature range and satisfy the general definition for waxes as detailed, for example, in Ullmans Encyklopädie der technischen Chemie, 4th Edition, Vol. 24, page 3, left-hand column.
However, the waxes are preferably selected from vegetable, animal and mineral waxes, preferred waxes having a melting point in the range of 50° to 85° C., in particular 60° C. to 75° C.
Combinations of common types of wax are found in known chemical dictionaries, for example Ullmann's above-mentioned encyclopedia.
According to the invention, particularly preferred waxes include beeswax (Cera Alba), carnauba wax, candelilla wax, montan wax, microcrystalline waxes (microcrystalline paraffins) and cetyl palmitate.
The teaching according to the invention also covers the combined use of a plurality of waxes. An addition of a small amount of carnauba wax may thus be used to increase the melting and dropping point of another wax and to reduce its tackiness. A number of wax mixtures, optionally mixed with further additives, are also commercially available. Waxes known by the names “Spezialwachs 7686 OE” (a mixture of cetyl palmitate, beeswax, microcrystalline wax and polyethylene with a melting range of 73 to 75° C., produced by Kahl & Co.), Polywax® GP200 (a mixture of stearyl alcohol and polyglycol distearate with a melting point of 47 to 51° C., produced by Croda) and “Weichceresin® FL 400” (a Vaseline/Vaseline oil/wax mixture with a melting point of 50 to 54° C., produced by Parafluid Mineralölgesellschaft) are examples of preferably used mixtures according to the invention.
Apart from the compounds conventionally defined as waxes (see above), so-called “liquid waxes”, for example jojoba oil, may also be used in a specific embodiment of the invention provided that the melting point of this “wax mixture” is not less than 40° C.
The preparations according to the invention contain the waxes preferably in amounts of 1.5 to 60% by weight, based on the total preparation. Amounts of 5 to 40% by weight, in particular 10 to 25% by weight, are particularly preferred.
The preparations according to the invention contain at least one emulsifier as the second essential component. Examples of possible emulsifiers include, in principle, both anionic and ampholytic, zwitterionic, cationic and nonionic surface-active compounds which are suitable for use on the human body. The use of anionic and nonionic surface-active compounds is preferred according to the invention.
Anionic surface-active compounds are characterized by a water-solubilizing anionic group, for example a carboxylate, sulfate, sulfonate or phosphate group and a lipophilic alkyl group containing about 10 to 22 carbon atoms. Glycol or polyglycol ether groups, ester, ether and amide groups and hydroxyl groups may also be contained in the molecule.
Examples of suitable anionic surface-active compounds, each in the form of sodium, potassium, magnesium and ammonium and mono-, di- and trialkanol ammonium salts containing 2 or 3 carbon atoms in the alkanol group, include linear fatty acids (soaps), ether carboxylic acids of the formula R—O—(CH
2
—CH
2
O)
x
—CH
2
—COOH, in which R is a linear alkyl group containing 10 to 22 carbon atoms and x=0 or 1 to 16, amide ether carboxylates of the formula [R—NH(—CH
2
—CH
2
—O)
n
—CH
2
—COO]
m
Z, in which R represents a linear or branched, saturated or unsaturated acyl radical containing 2 to 29 carbon atoms, n represents integers from 1 to 10, m represents the numbers 1 or 2 and Z is a cation from the group comprising alkali or alkaline-earth metals, acyl sarcosides, acyl taurides, acyl isethionates, sulfosuccinic acid mono- and dialkyl esters, sulfosuccinic acid monoalkyl polyoxyethyl esters, linear alkane sulfonates, linear alpha-olefin sulfonates, alpha-sulfofatty acid methyl esters, alkyl sulfates and alkyl polyglycol ether sulfates of the formula R—O(CH
2
—CH
2
O)
x
—SO
3
H, in which R is a preferably linear alkyl group containing 10 to 18 carbon atoms and x=0 or 1 to 12, mixtures of surface-active hydroxysulfonates, sulfated hydroxyalkyl polyethylene and/or hydroxyalkylene propylene glycol ethers, sulfonates of unsaturated fatty acids, alcohol-containing tartaric acid and citric acid esters, representing addition products of about 2 to 15 molecules of ethylene oxide and/or propylene oxide to fatty alcohols containing 8 to 22 carbon atoms, coconut monoglyceride sulfates, phosphoric acid mono-, di- and triesters of alkoxylated fatty alcohols and mixtures thereof, for example the product

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