Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Reexamination Certificate
2003-10-02
2004-12-28
Mruk, Brian P (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
C510S295000, C510S438000, C510S470000, C510S475000, C424S070130
Reexamination Certificate
active
06835701
ABSTRACT:
BACKGROUND OF THE INVENTION
Numerous patent applications describe cleaning cloths with a disinfecting effect, cf. WO 95/17175 or WO 98/55096. Various textiles are used as the carrier material for impregnation with cleaning solutions (WO 99/13861 and WO 01/08657). WO 99/66793 mentions active components which can be applied to cloths.
Besides cleaning, skin care is also being increasingly taken into consideration. For example, WO 95/35411 describes wet wipes impregnated with a lotion which, besides mineral oil, contains fatty acid esters, fatty alcohol ethoxylates and fatty alcohols. These wet wipes are mainly intended for use on the skin. Even where they mention use on the hair, the cited applications do not solve the problem of the hair fibers sticking together or the components remaining on the scalp which presupposes very high compatibility of the compounds.
Accordingly, a first problem addressed by the invention was to provide cleaning cloths for hair care using special highly compatible surfactants which would be simple, clean and quick to use and which would have a good cleaning effect. These surfactants would not cause hair fibers to stick together because the intention would be for the formulations to remain in the hair after application.
Another problem arises in the production of wet wipes. In order to impregnate it with the cleaning solution, the cloth or tissue paper is either sprayed with or immersed in the cleaning solution. In either case, foaming or inadequate wetting can lead to a reduction in throughput in production. Accordingly, another problem addressed by the present invention was to provide a surfactant solution which, by virtue of its viscosity and low foaming, would be rapidly absorbed into the cloths so that the surfactants could be thoroughly distributed throughout, thereby enabling wet wipes to be produced in a technically simple and hence inexpensive manner. However, if the cleaning cloths are intended to be dry and wetted with water before use, rapid evaporation of the solvent during production is desirable.
DESCRIPTION OF THE INVENTION
The present invention relates to the use of cleaning cloths distinguished by the fact that they are impregnated with a surfactant solution containing
(a) alk(en)yl oligoglycosides,
(b) alcohol polyglycol ethers and/or
(c) hydroxy mixed ethers
for the care and cleaning of hair.
It has been found that cleaning cloths containing surfactant mixtures of alk(en)yl oligoglycosides in combination with alcohol polyglycol ethers or hydroxy mixed ethers solve the complex problem stated above in excellent fashion. After application to hair, they show a distinct cleaning effect without leaving any feeling of stickiness behind. In addition, cleaning performance, hair volume and hair luster can be influenced through the choice of solvent. As a so-called leave-on formulation, the surfactant mixture applied is highly compatible so that there is no need for subsequent rinsing of the hair. Accordingly, simple and hygienic use for cleaning hair is even possible in cases where hair cannot be washed in the usual way as, for example, with bedridden patients or on journeys.
In addition, the applied surfactant solutions based on alk(en)yl oligoglycosides and alcohol polyglycol ethers and/or hydroxy mixed ethers have been found to be readily processable, low in viscosity and largely foam-free in production so that they are rapidly absorbed by the particular cloth. This effect is further enhanced by the use of an alcoholic/aqueous solvent.
Alkyl and/or Alkenyl Oligoglycosides
Alk(en)yl oligoglycosides are known nonionic surfactants which correspond to formula (I):
R
1
O—[G]
p
(I)
where R
1
is an alkyl and/or alkenyl group containing 4 to 22 carbon atoms, G is a sugar unit containing 5 or 6 carbon atoms and p is a number of 1 to 10. They may be obtained by the relevant methods of preparative organic chemistry. EP-A1 0301298 and WO 90/03977 are cited as representative of the extensive literature available on this subject.
The alkyl and/or alkenyl oligoglycosides may be derived from aldoses or ketoses containing 5 or 6 carbon atoms, preferably glucose. Accordingly, the preferred alkyl and/or alkenyl oligoglycosides are alkyl and/or alkenyl oligoglucosides. The index p in general formula (I) indicates the degree of oligomerization (DP), i.e. the distribution of mono- and oligoglycosides, and is a number of 1 to 10. Whereas p in a given compound must always be an integer and, above all, may assume a value of 1 to 6, the value p for a certain alkyl oligoglycoside is an analytically determined calculated quantity which is generally a broken number. Alkyl and/or alkenyl oligoglycosides having an average degree of oligomerization p of 1.1 to 3.0 are preferably used. Alkyl and/or alkenyl oligoglycosides having a degree of oligomerization of less than 1.7 and, more particularly, between 1.2 and 1.4 are preferred from the applicational point of view.
The alkyl or alkenyl radical R
1
may be derived from primary alcohols containing 4 to 11 and preferably 8 to 10 carbon atoms. Typical examples are butanol, caproic alcohol, caprylic alcohol, capric alcohol and undecyl alcohol and the technical mixtures thereof obtained, for example, in the hydrogenation of technical fatty acid methyl esters or in the hydrogenation of aldehydes from Roelen's oxosynthesis. Alkyl oligoglucosides having a chain length of C
8
to C
10
(DP=1 to 3), which are obtained as first runnings in the separation of technical C
8-18
coconut oil fatty alcohol by distillation and which may contain less than 6% by weight of C
12
alcohol as an impurity, and also alkyl oligoglucosides based on technical C
9/11
oxoalcohols (DP=1 to 3) are preferred. In addition, the alkyl or alkenyl radical R
1
may also be derived from primary alcohols containing 12 to 22 and preferably 12 to 14 carbon atoms. Typical examples are lauryl alcohol, myristyl alcohol, cetyl alcohol, palmitoleyl alcohol, stearyl alcohol, isostearyl alcohol, oleyl alcohol, elaidyl alcohol, petroselinyl alcohol, arachyl alcohol, gadoleyl alcohol, behenyl alcohol, erucyl alcohol, brassidyl alcohol and technical mixtures thereof which may be obtained as described above. Alkyl oligoglucosides based on hydrogenated C
12/14
coconut oil fatty alcohol having a DP of 1 to 3 are preferred. The alkyl and/or alkenyl oligoglycosides may be used in quantities—based on the wet wipes—of 0.05 to 2 and preferably 0.5 to 1 % by weight and in quantities—based on the concentrates—of 30 to 80 and preferably 50 to 70% by weight, the ratio by weight of alcohol polyglycol ethers to glycoside being in the range from 10:90 to 90:10, preferably in the range from 25:75 to 75:25 and more particularly in the range from 40:60 to 60:40.
Alcohol Polyglycol Ethers
Alcohol polyglycol ethers are known nonionic surfactants which are normally obtained by addition of ethylene oxide and/or propylene oxide blockwise or in random distribution onto suitable primary alcohols or polyols. The polyglycol ethers normally correspond to formula (II):
in which R
2
is a linear and/or branched alkyl and/or alkenyl group containing 6 to 22, preferably 8 to 18 and more particularly 10 to 12 carbon atoms, an ethylene glycol or glycerol unit, x and z independently of one another stand for 0 or numbers of 1 to 40 and y stands for numbers of 1 to 40. Accordingly, the polyglycol ethers compulsorily contain at least one propylene oxide unit. Typical examples are products of the addition of on average 1 to 40, preferably 5 to 30 and more particularly 8 to 15 mol ethylene oxide and/or 1 to 10 and preferably 2 to 5 mol propylene oxide onto fatty alcohols, oxoalcohols or Alfols such as, for example, caproic alcohol, caprylic alcohol, 2-ethylhexyl alcohol, capric alcohol, lauryl alcohol, isotridecyl alcohol, myristyl alcohol, cetyl alcohol, palmitoleyl alcohol, stearyl alcohol, isostearyl alcohol, oleyl alcohol, elaidyl alcohol, petroselinyl alcohol, linolyl alcohol, linolenyl alcohol, elaeostearyl alcohol, arachyl alcohol, gadoleyl alcohol, behenyl al
Goebels Dagmar
Hensen Hermann
Seipel Werner
Cognis Deutschland GmbH & Co. KG
Ettelman Aaron R.
Mruk Brian P
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