Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Reexamination Certificate
1994-05-02
2001-01-09
Bell, Mark L. (Department: 1755)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
C510S130000, C510S137000, C510S138000, C510S119000, C510S127000, C510S128000, C510S159000, C510S470000, C510S472000, C510S475000, C510S476000, C510S498000
Reexamination Certificate
active
06172018
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to mild cleaning preparations, more particularly for the washing or rinsing of hair.
2. Statement of Related Art
To obtain a cleaning effect, water-containing cleaning preparations normally contain surface-active compounds which generally increase the effect of the preparation on the skin. This applies in particular to the important class of anionic surfactants.
This increased effect on the skin should be avoided in the case of personal hygiene preparations. High skin compatibility is particularly important in the case of products which are designed for frequent use, which are used for washing intimate parts of the body or which come into contact with mucosa. Accordingly, there is a constant need for mild water-containing cleaning preparations with high foaming power.
Preparations for washing or rinsing hair, for example shampoos and hair treatment preparations removable by rinsing, are of particular interest in the field of water-based cleaning preparations. In particular, there is a constant need for preparations which have an improved effect in regard to the fullness and stylability of hair.
The hair is often in a cosmetically unsatisfactory state after washing. It feels dull, is difficult to comb when wet and tends to develop static charges when dry which makes it difficult to comb and affects the set of the hair after combing.
It is known that zwitterionic polymers containing anionic groups, generally carboxyl groups, and quaternary ammonium groups in the molecule can be used in hair treatment preparations. For example, DE-OS-21 50 557 describes the use of polymers of zwitterionic monomers in hair setting preparations. However, zwitterionic polymers are attended by the disadvantage, particularly in formulations containing anionic surfactants, that the hair-conditioning and hair-setting properties are gradually lost in the event of prolonged storage.
DE-OS-33 26 230 describes water-containing preparations for the washing and rinsing of hair which are said to improve the fullness and stylability of the hair through the presence of special polyaldehydocarboxylic acids.
It is also known that conditioning preparations, generally based on cationic surfactants, can be applied to the hair after washing or shampooing and that conditioners can be added to shampoos in order to obtain a certain conditioning effect when the hair is washed. Substances such as these include, for example, cationic polymers, for example cationic cellulose derivatives. European patent application EP 337 354 describes preparations containing a combination of alkyl glycosides and a cationic polymer.
Although it is possible with auxiliaries such as these to obtain a satisfactory improvement in wet combability and, for example with cationic surfactants, a reduction in static charging, these effects are almost always accompanied by excessive smoothing of the dry hair. This gives rise to the disadvantage that the hair lacks fullness and is unable to hold styles. The smoothness of the hair is more pronounced, the lower the combing resistance of the dry hair.
Accordingly, the problem addressed by the present invention was to provide water-containing cleaning preparations, more particularly for the washing and rinsing of hair, which would combine high foaming power with a minimal effect on the skin and which would significantly reduce the smoothness of dry hair without making the hair tacky and without any adverse effect on its wet combability.
DESCRIPTION OF THE INVENTION
It has now surprisingly been found that the fullness and stylability of hair can be distinctly improved in relation to the prior art if the water-containing cleaning preparation contains from 1 to 50% by weight of an anionic surfactant, from 0.5 to 10% by weight of an alkyl glycoside and from 0.1 to 5% by weight of an anionic polymer.
Accordingly, the present invention relates to water-containing cleaning preparations containing
(A) 1 to 50% by weight of one or more anionic surfactants containing 1 or 2 lipophilic groups with 1 to 22 carbon atoms and a polar group selected from carboxylate, sulfate or sulfonate groups and optionally a polyoxyalkylene group having an average degree of alkoxylation of 1 to 15,
(B) 0.5 to 10% by weight of one or more alkyl glycosides corresponding to the general formula R(G)
x
in which R is a linear, saturated C
8-22
alkyl radical and (G)
x
is a glycoside or oligoglycoside having a degree of oligomerization x of 1 to 4,
(C) 0.1 to 5% by weight of an anionic polymer,
(D) 35 to 98.4% by weight of water,
the sum total of components (B) and (C) being no greater than the content of component (A).
In the context of the invention, a polyoxyalkylene group is understood to be a group which is made up of oxyethylene units —[CH
2
—CH—O]— or of oxypropylene units —[CH(CH
3
)—CH
2
—O]—. The average number of oxyethylene units or oxypropylene units is termed the average degree of alkoxylation.
According to the invention, the anionic surfactants (A) are preferably selected from the group consisting of alkyl and dialkyl ether sulfates, ether carboxylic acids, sulfosuccinic acid semiesters, fatty alcohol ether citrates, fatty alcohol ether tartrates, acyl sarcosides, acyl taurides and sulfonates of unsaturated fatty acids.
The counterions of the carboxylate, sulfate or sulfonate groups are preferably selected from the group consisting of alkali and alkaline earth metals, aluminium, ammonium and alkyl or alkylolammonium groups containing 1 to 4 carbon atoms in each alkyl or alkylol group. The group of alkali metals is most particularly suitable.
The chemical structures and the basic surfactant properties of most of these anionic surfactants are now established textbook knowledge and, accordingly, require no further explanation. Dialkyl ether sulfates are compounds of the type described in European patent application EP 299 370. Particulars of the production and properties of these compounds can be found in that document. Fatty alcohol ether tartrates are monoester salts of tartaric acid while fatty alcohol ether citrates are monoester and/or diester salts of citric acid with adducts of ethylene oxide and/or propylene oxide with fatty alcohols. Sulfonates of unsaturated fatty acids are sulfonation products of fatty acids containing 12 to 22 carbon atoms and 1 to 6 double bonds. Products such as these are known from the literature and are obtainable, for example, by reaction of these fatty acids with gaseous sulfur trioxide. Taking oleic acid as an example, particulars of their production can be found in German patent application DE 39 26 344.
In the case of anionic surfactants containing a polyoxyalkylene group, it may be stated quite generally with regard to the degree of alkoxylation that alkoxylation reactions such as, for example, the addition of x moles of ethylene oxide onto 1 mole of fatty alcohol by known methods of ethoxylation do not give an adduct per se, but rather a mixture of residues of free fatty alcohol and a series of homologous (oligomeric) addition products of 1, 2, 3, . . . x, x+1, x+2 . . . etc. molecules of ethylene oxide per molecule of fatty alcohol. The average degree of ethoxylation (x) is defined by the starting quantities of fatty alcohol and ethylene oxide. The distribution curve of the homolog mixture generally shows a maximum in the range from x−3 to x+3. Further information on this subject can be found, for example, in the journal
Soap/Cosmetics/Chemical Specialities,
January 1988, page 34. However, in addition to the standard alkoxylation catalysts known from the prior art, such as sodium methanolate, catalysts leading to so-called narrow-range products may also be used (cf. for example
Seifen
-
{umlaut over (O)}le
-
Fette
-
Wachse
1990 (116) 60).
In one preferred embodiment of the invention, the percentage content of anionic surfactants is 5 to 30% by weight.
Alkyl glycosides (B) corresponding to the general formula R—(G)
x
are well-known surface-active substances which can b
Hollenberg Detlef
Mueller Reinhard
Patten Anja
Seidel Kurt
Bell Mark L.
Drach John E.
Hailey Patricia L.
Henkel Kommanditgesellschaft auf Aktien
Millson, Jr. Henry E.
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