Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Reexamination Certificate
1999-07-16
2001-11-27
Gupta, Yogendra N. (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
C510S123000, C510S129000, C510S130000, C510S433000, C510S499000, C424S070100, C424S070190
Reexamination Certificate
active
06323166
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention claims the priority of Japanese Patent Application Nos. 10-222302 filed Jul. 22, 1998 and 11-35623 filed Feb. 15, 1999 which are incorporated herein by reference.
The present invention relates to shampoo compositions for cleaning the head and body, softening the hair, giving a rinsing effect and improving atopic dermatitis (including bath shampoo compositions).
Recently, the presence of a disease called “chemical hypersensitivity” has been reported. This disease manifests itself to involve vegetative disorder, headache, melancholia, nausea, etc. when the total uptake of chemicals exceeds a certain level. Another disease called “sick house syndrome” has also been reported, which is caused by the interior air contaminated with building materials or coatings in newly built or rebuilt houses. These diseases are caused by several tens of thousands or more types of chemicals produced.
Dirt on the skin includes fats, sweat and dead keratin resulting from skin metabolism as well as minute chemicals contained in dust as described above, allergens and chemicals contained in skin detergents or rinses, hair-setting sprays and like daily products. These chemicals deposited on the skin are believed to cause atopic dermatitis. These minute chemicals penetrate the interstices between the epidermal keratin just before exfoliation and the underlying keratin to transcutaneously have an adverse influence on human bodies. Even those who have not developed atopic dermatitis may show conditions thereof when the total uptake of chemicals exceeds a certain level.
Therefore, people of the present generation are required to remove these minute chemicals from the skin.
These minute chemicals entered between keratins can not be removed with surfactants alone. Petroleum surfactants induce denaturation of protein while soaps consisting of fatty acid salts are not preferable for application to affected skin because of their alkalinity. Natural fat-derived detergents such as N-acylated amino acid surfactants or sugar esters do not irritate the skin, but their detergency is low.
Quaternary ammonium surfactants such as dialkyldimethylammonium chloride conventionally used for softening the hair promote skin roughening. Rinse-in-shampoos recently available on the market are dubious in terms of safety.
The present invention proposes a shampoo composition for removing minute chemicals deposited on the skin responsible for atopic dermatitis as described above, and also softening the hair, giving a rinsing effect and controlling dandruff and itch on the scalp.
SUMMARY OF THE INVENTION
The present invention provides a shampoo composition comprising (a) 0.05-5.0% by weight of an essential oil component selected from the group consisting of terpene esters and terpene hydrocarbons (including essential oil components selected from the group consisting of linalool, citronellol, nerol, terpineol, geraniol and cineole), (b) 3.0-20% by weight of an N-acylamino acid salt and (c) 0.1-15.0% by weight of a sucrose fatty acid ester or C
6
-C
18
fatty acid alkylolamide, on the basis of the total weight of the composition.
The ratio of said (a) to (b) is 1:2-1:120, preferably 1:9-1:80.
DETAILED DESCRIPTION OF THE INVENTION
Terpene esters, terpene hydrocarbons and other essential oil components used in the present invention are isolated or synthesized essential oil components capable of dissolving chemical fine powder and fats. These terpene esters or terpene hydrocarbons generally have analgesic, rot-proof, antibacterial and antiviral effects on the skin, and are orally and transcutaneously innocuous, non-neurotoxic upon inhalation and internally metabolized. These components are used in the range of 0.05 to 5.0% by weight, preferably 0.1 to 1.0% by weight.
Terpene esters have been found to be generally innocuous, non-irritatave and non-sensitizable, have antibacterial and anti-inflammatory effects and have their components safely metabolized after transcutaneous penetration. Among terpene esters, monoterpene esters are preferred. Specific compounds include acetate esters such as linalyl acetate, geranyl acetate, benzyl acetate, bornyl acetate, terpinyl acetate, citronellyl acetate, eugenyl acetate or neryl acetate, citronellyl formate, isobutyl angelicate, methyl anthranilate or methyl cinnamate, preferably linalyl acetate, geranyl acetate or bornyl acetate.
Essential oils per se are not used in the present invention, because they may contain toxic components and have varying compositions dependent on the place or year of production and so it is difficult to check their safety.
Terpene hydrocarbons may be used in place of or in addition to terpene esters of the present invention because they dissolve fats and synthetic products, among which pinenes are especially preferred because they mildly dissolve fats and synthetic products. They are preferably combined with natural vitamin E as an antioxidant because they somewhat irritate the skin when they are oxidized. Terpene hydrocarbons include monoterpene hydrocarbons, sesquiterpene hydrocarbons and diterpene hydrocarbons, etc., preferably monohydrocarbons, most preferably &agr;- or &bgr;-pinene, d-limonene, terpinene because of their high safety.
Other terpenes than terpene esters and terpene hydrocarbons, which can be used in addition to said terpene esters or terpene hydrocarbons, include terpene alcohols such as linalool, citronellol, nerol, terpineol, geraniol. Cineole can also be used. These components have the ability to dissolve fats but not synthetic products, so that they are used to control the detergency, which could not be controlled by surfactants.
Among said essential oil components, &agr;-pinene, d-limonene, bornyl acetate and linalyl acetate have good effects without unpleasant odor. Especially, &agr;-pinene is preferable because of mildness and good balance between dissolving powers for chemical fine powder and for fats.
&agr;- or &bgr;-pinene and d-limonene can readily be solubilized in triethanolamine N-cocoyl DL-alanine especially in the presence of a sucrose fatty acid ester or a coconut fatty acid diethanolamide to form a clear shampoo. Linalyl acetate, geranyl acetate, bornyl acetate and citronellyl acetate can readily be solubilized in triethanolamine N-cocoyl DL-alanine in the presence of a coconut fatty acid diethanolamide to form a clear shampoo. If an N-acyl fatty acid L-glutamic acid salt is used, essential oil components will be translucent, gelled or creamed. According to the present invention, essential oil components appear clear in acidic medium but not in basic medium.
Now, the N-acylamino acid salt of the present invention is described in which are emulsified, creamed, solubilized, gelled or dispersed terpene esters, hydrocarbons or the like used in the present invention.
N-Acylamino acid salts are known to cause no denaturation of protein and have skin protection effect and bacteriostatic effect. We discovered that N-acylamino acid salts readily solubilize terpene esters or the like to readily convert them into solution, gel or cream. In the present invention, N-acylamino acid salts can be used in the amount of 3.0-20.0% by weight, preferably 6.0-15.0% by weight.
The amino acid in the N-acylamino acid salt is not specifically limited, but preferably hydrophilic acidic amino acids such as L-glutamic acid, L-aspartic acid; and basic amino acids such as L-arginine, L-lysine. Most preferred amino acids include aliphatic amino acids such as DL-alanine, DL-glycine. The fatty acid forming N-acyl includes coconut fatty acid, stearic acid, myristic acid, palmitic acid, oleic acid, linoleic acid, linolenic acid, lauric acid, tridecyl acid, pentadecyl acid, heptadecyl acid, nonadecanoic acid, arachic acid and behenic acid, preferably C
6
-C
18
fatty acids, more preferably coconut fatty acid. Salts thereof include sodium salts, potassium salts or triethanolamine salts, etc. Specific compounds of N-acylamino acid salts include triethanolamine N-cocoyl DL-alanine, N-cocoyl L-glutamic acid salts (including sodi
Gupta Yogendra N.
Kamiya Akira
Mruk Brian P.
Roylance Abrams Berdo & Goodman L.L.P.
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