Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Cosmetic – antiperspirant – dentifrice
Reexamination Certificate
1998-11-25
2001-05-22
Dudash, Diana (Department: 1619)
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Cosmetic, antiperspirant, dentifrice
C514S844000, C514S846000
Reexamination Certificate
active
06235296
ABSTRACT:
The present invention relates to skin cleaning agents having an improved cleaning action and a gentle behavior to the skin. The present invention further relates to a process for their production and to the use of the agents as flowable hand cleaning agents and heavy-duty hand cleaning agents.
Hand cleaning agents, in particular for the removal of strongly adhering dirt, have already been used in the industrial sector for some time. Patent application No. WO 91/14420 describes cleaning agents which, in addition to anionic and/or non-ionogenic surfactants, comprise conventional abrasives, organic solvents in the form of carboxylic acid esters, in particular certain acetates, such as preferably n-butoxy-2-ethoxy-ethyl-acetate and fatty alkanolamides, fatty polyalkanolamides, the ethylene oxide and/or propylene oxide addition products thereof, as well as fatty acid monoglycerides as re-greasing agents. Another preferred, additionally used solvent in these hand cleansing agents is limonene, which is known to have a dermal incompatibility involving a sensitization risk. In order to produce the agents according to WO 91/14420 in an efficient manner, it is necessary to heat the mixture to temperatures above 50° C. after mixing the raw materials, requiring additional heating energy and involving longer production periods.
Furthermore, hand cleaning agents are known which comprise as solvent component natural oils, such as olive oil, jojoba oil, macadamia-nuts-oil, and grape-seed oil. These cleaning agents have limited detergent properties due to the interaction between the oil portions and the detergent portions and because of the low soil-removing capacity of the natural oil.
In cosmetics the use of special esters of the adipic acid is known. For instance, owing to its slightly greasing character, di-n-butyl adipate is used in day creams and liquid emulsions as well as in hair sprays and setting lotions as softening component or agent to achieve a superfatted state.
Patent No. GB 1,106,945 describes aqueous shampoo preparations for hair cleaning purposes; they comprise as solvents for fats alkyl esters of the dibasic carboxylic acids, phthalic acid or adipic acid. In hair cleaning and hair conditioning, particularly good results are obtained with dimethyl phthalate, however, there is no reference with respect to skin cleaning, in particular to the cleaning of skin heavily soiled by foreign substances.
EP 229 616 A2 describes bath additives comprising diisopropyl adipate as oil component which deposits on the skin.
EP 513 832 A1 describes pharmaceutical products comprising dibutyl adipate or a combination of dibutyl adipate and isopropyl myristate to improve or to control the skin penetration of a therapeutic agent.
Diisopropyl adipate is additionally used as lubricant in alcoholic lotions, as softener in hair aerosols and as fat factor in hair tonics and as solubilizer for perfumes.
PCT-application No. WO 92/09265 describes a solvent-containing hand cleaning paste containing as solvent DBE 2, dimethyl adipate, dimethyl glutarate and dimethyl succinate, in an amount up to 54 parts per 100 parts of cleaning agent, as well as isooctyl stearate as additionally required re-greasing agent and bleached kernel or shell flour as mild abrasive.
In EP No. 0166522 A2 a cosmetic preparation for the removal of nail varnish is described, which has also skin cleaning properties and comprises as solvent for the nail enamel esters of dicarboxylic acids, preferably diesters or esters of diols, preferably dioldiesters. The diethyl esters of dicarboxylic acids having up to 6 C-atoms are preferred as dicarboxylic acid esters, and the diacetates of diols having 2 to 6-C-atoms are preferred as diol esters. Additionally, the preparations contain lanolin or other re-greasing components and no abradant.
For this reason, the use of the known solvents in skin cleaning agents has made it necessary until today to compensate their intense effect on the skin by the action of re-greasing agents. However, the detergent action of the surfactants is slightly affected by the re-greasing components.
Accordingly, there was the object to provide skin cleaning agents and a process for their production, whose solvents have a comparable or improved cleaning action and thus an action which intensifies the cleaning effect, as well as an improved dermatologic compatibility. Additionally, there was the object to find a process for the manufacture of skin cleaning agents, in which heating of the raw material mixture may be omitted.
These objects have been achieved by skin cleaning agents which comprise as exclusive solvents di-n-butyl adipate and/or diisopropyl adipate and which, parallel to this, comprise as major components washing-active substances, components for the improvement of consistency, appearance, odor and storage stability, as well as at least one abrasive and water, and the production of which may be effected by using certain fatty alcohols in order to improve the cleaning action and the production conditions.
The subject matter of the present invention are hydrous, liquid, paste- or cream-like skin cleaning agents for the removal of strongly adhering dirt, which comprise anionic and/or amphoteric and/or non-ionogenic surfactants as washing-active substances, thickeners, at least one abrasive and, optionally, adjuvants for the regulation of consistency, appearance, odor, and stability, such as pigments, fragrances, stabilizers, and preservatives, and which are characterized in that they comprise di-n-butyl adipate and/or diisopropyl adipate as exclusive solvents. Known detergents are used as washing-active substances, in particular anionic and/or amphoteric and/or non-ionogenic surfactants, e.g., alkyl sulfates, alkyl sulfonates, alkyl ether sulfates, and fatty alcohol polyglycol sulfosuccinates, which are predominantly used in the form of their sodium salts, as well as the known non-ionogenic surfactants based on addition products of alkylene oxides to alkanols, alkanoic acids, which may also be capped at the end, and preferably alkyl polyglycosides.
Preferred surfactants include Na-lauryl ether sulfate, castor oil sulfonate, di-Na-lauryl polyglycol ether sulfosuccinate, cocoamidopropyl betaine, and alkyl polyglycosides having an alkyl residue of C
8
-C
16
, preferably C
8
to C
10
and an oligoglycoside residue having an oligomerization degree of 1.1-1.7, preferably 1.2-1.3.
The portion of the active detergents amounts to 5-40%-wt., preferably 10-30%-wt., relative to the skin cleaning agent according to the present invention.
The portion of the esters di-n-butyl adipate and/or diisopropyl adipate in the agents according to the present invention amounts to 1-25%-wt., preferably 5 to 20%-wt., and particularly preferred 10-20%-wt.
Abrasives to be used with preference are the bleached kernel/shell flours according to WO 92/09265, in particular bleached walnut shell flour or olive kernel flour. The portion of the abrasive in the agent according to the present invention amounts to 1-30%-wt., preferably 10-20%-wt.
The agents according to the present invention further comprise viscosity forming agents, such as organophilic and/or hydrophilic phyllosilicates, such as bentonites, polysaccharides, such as cellulose and guar flour, as well as modified polysaccharides, such as the cellulose ethers, carboxymethylcellulose, and hydroxyethyl-cellulose and xanthan gum, and inorganic electrolytes, such as NaCl or MgSO
4
. They further comprise chromatophoric pigments, such as TiO
2
, stabilizers, such as propylene carbonate, pH-regulators, fragrances, and preservatives. The water content of the skin cleaning agents amounts to 10-50%-wt., preferably 20-40%-wt.
Re-greasing components may be omitted in the production of the skin cleansing agents according to the present invention. Preferably, the skin cleaning agents are obtained as liquid or creamy agents or as flowable viscous pastes.
According to another preferred embodiment, the skin cleaning agents according to the present invention additionally comprise at least one fatty alcoho
Brucher Beatrice
Daniel Gunter
Rosenberger Volker
Chemische Fabrik Stockhausen GmbH
Dudash Diana
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Sharareh Shahnam
LandOfFree
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