Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Cosmetic – antiperspirant – dentifrice
Reexamination Certificate
2000-06-01
2001-10-23
Dodson, Shelley A. (Department: 1616)
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Cosmetic, antiperspirant, dentifrice
C424S059000
Reexamination Certificate
active
06306410
ABSTRACT:
BACKGROUND OF THE INVENTION
Oilbased decorative cosmetics, such as lipstick, foundation, mascara or eye shadow, are normally removed from the skin by a two-stage procedure. First, greasy skin soils are removed with massage creme, cleansing creme, cleansing oil, cleansing gel and/or other face washes which combine well with decorative cosmetics. In a second step, greasy residues remaining on the skin, tallow and other soils are washed off with soap or cleansing foams. This two-stage cleansing of the skin is necessary because, where formulations containing oil components in relatively large amounts (for example massage cremes) are used, the oil components remaining on the skin cannot be sufficiently removed by subsequent rinsing with cold or luke-warm water, so that no feeling of freshness can be imparted to the skin. If, by contrast, washing formulations alone, such as soaps, are used to cleanse the skin, pigments and other coloring substances surrounded by oil components cannot be removed. In recent years, however, there has been a demand for easy-to-use cosmetics and make-up removers which are capable of removing decorative cosmetics in a single wash and of imparting a fresh, non-greasy “washed” feeling. Corresponding one-step formulations are known, for example, from JP-A Sho 63/122618, JP-A Hei 04/005213 and JP-A Hei 07/215842. These formulations are single-phase or two-phase face washes which contain certain nonionic surfactants in combination with water-soluble substances. In addition, foaming washes based on certain nonionic surfactants and anionic surfactants are known from JP-A Hei 07/215840, JP-A Hei 07/304630 and JP-A Hel 07/29/831. Unfortunately, these one-step face washes are still unsatisfactory in two respects. First, they have a poor skin-cleansing effect with respect to decorative cosmetics which, in recent years, have contained increasing levels of oil components or even film formers. Second, the sensorial impression which they impart, for example as regards spreading or slip on application to the skin, is in need of improvement.
Reference is also made in this connection to DE 2024051 C3 (Henkel) which describes the use of ethoxylated partial glycerides as refatting agents.
Accordingly, the problem addressed by the invention was to provide cosmetic formulations, particularly skin cleansers, which would cleanse the skin in one step and, in doing so, would completely remove cosmetics, particularly decorative cosmetics, for example make-up, eye shadow, rouge, kajal, mascara, lipstick and the like. For aesthetic reasons, the formulations would be single-phase, transparent and low-viscosity formulations and would not lose these properties, even in the event of storage at relatively high temperatures. Finally, the formulations would leave behind a sensorially agreeable light feeling.
BRIEF SUMMARY OF THE INVENTION
The present invention includes cosmetic formulations having a defined nonionic surfactant content, for example, skin cleansers for removing decorative cosmetics.
(a) 20 to 80 and preferably 25 to 35% by weight of ethoxylated partial glycerides and optionally
(b) 0.1 to 80 and preferably 15 to 75% by weight of oils,
with the proviso that the quantities add up to 100% by weight, optionally with water and typical auxiliaries and additives.
It has surprisingly been found that formulations of the type mentioned above comprise one phase and are transparent. The single-phase character of the formulations according to the invention emanates from the fact that they are not o/w or w/o emulsions, but transparent or semi-transparent compositions. They have a sufficient, but not excessive viscosity for application which they retain, even in the event of storage at relatively high temperatures. The invention includes the observation that the formulations are easy to rinse off with water, completely remove decorative cosmetics, more particularly make-up, mascara and eye shadow, in one step and, at the same time, impart a pleasant feeling to the skin.
DETAILED DESCRIPTION OF THE INVENTION
Ethoxylated partial glycerides, i.e. addition products of ethylene oxide with monoglycerides, diglycerides and technical mixtures thereof, can contain small quantities of triglycerides from their production. The partial glycerides preferably correspond to formula (I):
where R
1
CO is a linear or branched, saturated and/or unsaturated acyl group containing 6 to 22 and preferably 12 to 18 carbon atoms, R
2
and R
3
independently of one another have the same meaning as R
1
CO or represent OH and the sum (m+n+p) is a number of 1 to 100 and preferably 5 to 10, with the proviso that at least one of the two substituents R
2
and R
3
is OH. Typical examples are addition products of 5 to 10 moles of ethylene oxide with mono- and/or diglycerides based on caproic acid, caprylic acid, 2-ethylhexanoic acid, capric acid, lauric acid, isotridecanoic acid, myristic acid, palmitic acid, palmitoleic acid, stearic acid, isostearic acid, oleic acid, elaidic acid, petroselic acid, linoleic acid, linolenic acid, elaeostearic acid, arachic acid, gadoleic acid, behenic acid and erucic acid and technical mixtures thereof. Technical ethoxylated lauric acid glycerides, palmitic acid glycerides, stearic acid glycerides, isostearic acid glycerides, oleic acid glycerides, behenic acid glycerides and/or erucic acid glycerides with about 7 moles of ethylene oxide, which have a monoglyceride content of 50 to 95 and preferably 60 to 90% by weight, are preferably used.
Oils
Suitable oils are, for example, Guerbet alcohols based on fatty alcohols containing 6 to 18 and preferably 8 to 10 carbon atoms, esters of linear C
6-22
fatty acids with linear C
6-22
fatty alcohols, esters of branched C
6-13
carboxylic acids with linear C
6-22
fatty alcohols, esters of linear C
6-22
fatty acids with branched alcohols, more particularly 2-ethyl hexanol, esters of linear and/or branched fatty acids with polyhydric alcohols (for example propylene glycol, dimer diol or trimer triol) and/or Guerbet alcohols, triglycerides based on C
6-10
fatty acids, liquid mono-/ di-/triglyceride mixtures based on C
6-18
fatty acids, esters of C
6-22
fatty alcohols and/or Guerbet alcohols with aromatic carboxylic acids, more particularly benzoic acid, esters of C
2-12
dicarboxylic acids with linear or branched alcohols containing 1 to 22 carbon atoms or polyols containing 2 to 10 carbon atoms and 2 to 6 hydroxyl groups, vegetable oils, branched primary alcohols, substituted cyclohexanes, linear and branched C
6-22
fatty alcohol carbonates, Guerbet carbonates, esters of benzoic add with linear and/or branched C
6-22
alcohols (for example Finsolv® TN), linear or branched, symmetrical or nonsymmetrical dialkyl ethers containing 6 to 22 carbon atoms per alkyl group, ring opening products of epoxidized fatty acid esters with polyols, silicone oils and/or aliphatic or naphthenic hydrocarbons.
Cosmetic Formulations
The formulations according to the invention, for example cremes, lotions or emollients, may additionally contain mild surfactants, emulsifiers, superfatting agents, pearlescing waxes, stabilizers, consistency regulators, thickeners, polymers, silicone compounds, biogenic agents, anti-dandruff agents, film-formers, preservatives, hydrotropes, solubilizers, UV filters, insect repellents, self-tanning agents, perfume oils, dyes and the like. The formulations are suitable not only for cleansing the skin, but also for caring for and protecting the skin. Accordingly, possible embodiments of the invention also include the use of the formulations for the production of make-up removers and sun blocks.
Typical examples of suitable mild, i.e. dermatologically compatible, surfactants are fatty alcohol polyglycol ether sulfates, monoglyceride sulfates, mono- and/or dialkylsulfosuccinates, fatty acid isethionates, fatty acid sarcosinates, fatty acid taurides, fatty acid glutamates, ether carboxylic acids, alkyl oligoglucosides, fatty acid glucamides, alkyl amidobetaines and/or protein fatty acid condensates (preferably based on wheat protei
Cognis Deutschland GmbH
Dodson Shelley A.
Drach John E.
Ettelman Aaron R.
George Konata M
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