Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Reexamination Certificate
2000-08-18
2003-02-04
Delcotto, Gregory (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
C510S125000, C510S127000, C510S137000, C510S138000, C510S158000, C510S159000, C510S499000, C510S501000, C510S504000, C424S070210, C424S070240, C424S070270, C424S070280, C424S070310
Reexamination Certificate
active
06514918
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a cleansing composition, which is mild to the skin and eyes and possesses sufficient viscosity with appropriate cleansing and foaming performance.
2. Description of the Prior Art
Historically, many mild cleansing compositions suffer from poor foaming and cleansing performance. As used herein, the term “mild cleansing compositions” refer to compositions that, when instilled into human eyes at about a 10% dilution level, cause an ocular irritation that is less than or equivalent to the irritation caused by a similar addition of sterile water thereto. In many cases, the ocular stinging effect of a composition on the eye is concentration dependent. Therefore, one way to reduce ocular irritancy is to minimize the amount of the cleansing composition that gets into the eye via increasing the viscosity of the product. For example, the viscosity of a shampoo may be sufficiently increased in order to minimize the amount that may drip from the head into the eyes during its use. However, it can be difficult or costly to thicken shampoos.
One known method for thickening mild cleansing compositions is via the addition of a viscosity builder such as a salt, e.g. sodium chloride, to a cleansing composition. However, the use of sodium chloride at high levels negatively impacts eye irritation. Another method for thickening mild cleansing compositions is via the addition of polymeric thickeners such as hydroxyethyl cellulose to the composition. Unfortunately, many of the polymeric thickeners are incompatible with surfactant systems and therefore contribute to instability of the final product. Yet another popular method for thickening mild cleansing compositions is via the addition of a polyol alkoxy ester to the composition. In each of these approaches, the compound is added merely to build viscosity of the cleansing system, thereby adding cost while contributing little else to the performance of the system.
A better approach to the problem is to incorporate surfactants that both build viscosity and contribute to the foaming and cleansing performance of the surfactant system while maintaining low cost. One such class of surfactants that have been used extensively for this purpose includes the alkanolamides, such as the fatty acid diethanotamides. The use of ethoxylated diethanolamines as irritancy mitigators has been described in U.S. Pat. No. 4,336,151. In U.S. Pat. No. 4,205,063, the use of fatty acid diethanolamide has been described in low irritation shampoo formulas as a foam booster. Unfortunately, the use of diethanolamides in cosmetic preparations has recently come under scrutiny due to safety concerns regarding their possible carcinogenicity.
Therefore, there is a need for a cosmetic ingredient that is capable of viscosity building and foam boosting without compromising the mildness and safety properties of the overall cleansing composition.
SUMMARY OF THE INVENTION
It has been discovered that the aforementioned objective can be achieved by selecting specific compounds to increase the viscosity while building the foam of a cleansing composition. The present invention provides a cleansing composition including a compound of formula I
wherein: R=C
6
to C
30
Fatty Acid, n=0 to 20, m=0 to 40, and n+m=2 to 60; and at least one anionic surfactant; wherein the composition is mild.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
The cleansing composition of the present invention is comprised of, consists of, and/or consists essentially of, based upon the total weight of the composition, a) from about 0.01% to about 10.0%, e.g. from about 0.1% to about 7.0% and from about 0.5% to about 3.0% of the compound of Formula I. and b) from about 0.1% to about 20%, e.g. from about 0.5% to about 10% and from about 0.75% to about 5% of an anionic surfactant.
The compound of Formula I may be selected from ethoxylated fatty amides, propoxylated fatty amides, fatty amides that contain both ethoxylate and propoxylate groups, and mixtures thereof. Suitable compounds include, but are not limited to, polyethylene glycol (“PEG”)-6 Cocamide, PEG-6 Lauramide, PEG-3 Cocamide, polypropylene glycol (“PPG”)-2 Hydroxyethyl Cocamide, PPG-1 Hydroxyethyl Caprylamide, and PPG-3 Hydroxyethyl Linoleamide. The preferred compounds include PPG-2 Hydroxyethyl Cocamide, which is available from Uniqema under the tradename, “Promidium CO”, PPG-1 Hydroxyethyl Caprylamide, which is available from Uniqema under the tradename, “Promidium CC”, PPG-3 Hydroxyethyl Linoleamide, which is available from Uniqema under the tradename, “Promidium SY”, and PEG-3 Cocamide, which is available from Heterene, Inc. under the tradename, “Hetoxamide CD-4.”
Classes of anionic surfactants useful in this invention include the alkyl sulfates, alkyl ether sulfates, sulfosuccinates, isethionates, acyl amides, alkyl ether carboxylates and alkyl phosphates, wherein the alkyl group has from about 6 carbon atoms to about 30 carbon atoms, with about 10 to about 14 carbon atoms being preferred.
In addition to at least one anionic surfactant, the mild cleansing composition of the invention may optionally contain a secondary surfactant selected from nonionic, amphoteric, betaine, cationic, and mixtures thereof. The total amount of anionic surfactant and secondary surfactant(s) that are suitable for use in the composition of the present invention may range from, based upon the total weight of the total cleansing composition, from about 2.5% to about 50%, e.g. from about 5% to about 40% and from about 8% to about 25%.
Types of nonionic surfactants that are suitable for use in this invention include the fatty alcohol acid or amide ethoxylates, monoglyceride ethoxylates, sorbitan ester ethoxylates and alkyl polyglycosides. These nonionic surfactants can be employed in composition of the present invention in an amount, based upon the total weight of the composition, from about 0.0% to about 30%, e.g. from about 0.1% to about 20% and from about 0.1% to about 15%.
Classes of amphoteric surfactants that are suitable for use in this invention include alkylimino-diproprionates, alkylamphoglycinates (mono or di), alkylamphoproprionates (mono or di), alkylamphoacetates (mono or di), N-alkyl &bgr;-aminoproprionic acids, alkylpolyamino carboxylates, and phosphorylated imidazolines. These amphoteric surfactants can be employed in composition of the present invention in an amount, based upon the total weight of the composition, from about 0.1% to about 20%, e.g. from about 0.1% to about 15% and from about 0.1% to about 10%.
Types of betaines that are suitable for use in this invention include alkyl betaines, alkylamido betaines, alkyl sultaines and alkylamido sultaines, wherein the alkyl group has from about 6 carbon atoms to about 30 carbon atoms, with about 10 to about 14 carbon atoms being preferred. These betaine surfactants can be employed in the cleansing composition of the present invention in an amount, based upon the total weight of the cleansing composition, from about 0.1% to about 15%, e.g. from about 0.1% to about 10% and from about 0.1% to about 8%.
Classes of cationic surfactants that are suitable for use in this invention include alkyl quaternaries (mono, di, or tri), benzyl quaternaries, ester quaternaries, ethoxylated quaternaries, alkyl amines, and mixtures thereof, wherein the alkyl group has from about 6 carbon atoms to about 30 carbon atoms, with about 8 to about 22 carbon atoms being preferred. These cationic surfactants can be employed in composition of the present invention in an amount, based upon the total weight of the composition, from about 0.01% to about 20%, preferably from about 0.05% to about 15% and more preferably from about 0.1% to about 10%.
Optionally, the mild cleansing compositions of this invention may also contain, based upon the total weight of the mild cleansing composition, from about 0.01 percent to about 1.0 percent, preferably from about 0.01 percent to about 0.5 percent, and more preferably from about 0.01 to about
Johnson & Johnson Consumer Companies Inc.
Mangini Michele G.
LandOfFree
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