Cleaning compositions for solid surfaces – auxiliary compositions – With oxygen – halogen – sulfur – or nitrogen containing or...
Reexamination Certificate
1999-09-17
2001-03-20
Hardee, John (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
With oxygen, halogen, sulfur, or nitrogen containing or...
C510S119000, C510S130000
Reexamination Certificate
active
06204229
ABSTRACT:
TECHNICAL FIELD
The present invention relates to a composition exhibiting high perfume retentivity, which is to be applied to hair or skin.
BACKGROUND ART
In order to heighten perfume retentivity, on hair or skin, of a surfactant-containing composition such as detergent, rinse or hair dye after treatment therewith, it is necessary that the perfume remains on the hair or skin treated, the remaining perfume is exhaled and the exhaled perfume is impressive and strong.
It is conventionally known from experience that a perfume substance having a large molecular weight and a low volatility tends to remain on the treated site. For example, in WO96/12876, described is a process for obtaining a perfume composition having high perfume retentivity, which comprises selecting, from perfume substances, low-volatile ones having a boiling point of 250° C. or greater, selecting therefrom a hydrophobic one having a CLogP value of 3 or greater and incorporating such a perfume substance in the perfume composition in an amount of 70% or greater.
DISCLOSURE OF THE INVENTION
Judging from that a perfume is used in various scenes, however, the present inventors considered it necessary to study whether the above-described rule of thumb is applicable to any case. As a result of an extensive investigation on the relation between the site to which a perfume is applied and properties of the perfume exhibited at the site, without being prejudiced by the conventional thought, the present inventors have found a clue of the present invention.
Described specifically, with the foregoing in view, the present inventors investigated on the site to which a perfume substance is applied and the behavior of the substance at the site. It has been found unexpectedly that the above-described rule of thumb is not always applicable to the case where the perfume substance is applied to hair or skin composed of keratin, one of organism-forming components. The detergent system of a shampoo or the like used for hair or skin is usually composed mainly of water and in this system, a perfume substance having a low CLogP value is considered to be washed away together with a large amount of water after use. Finding, among perfume substances having a low CLogP value, the substance exhibiting high perfume retentivity, the present inventors tried to elucidate the reason for it and reached a novel finding that a substance having a specific chemical structure exhibits markedly strong perfume retentivity. As a result of further investigation, it has been found that a perfume substance having a specific chemical structure and has a CLogP value not greater than 1.5 has high perfume retentivity and by using it, a composition having high perfume retentivity to be applied to hair or skin is available, leading to the completion of the present invention.
In the present invention, there is thus provided a composition to be applied to hair or skin, which comprises (A) a surfactant and (B) a perfume substance having an aromatic, pyran or furan ring and a carbonyl group, ether bond, carboxyl group or nonaromatic unsaturated bond, wherein the perfume substance (B) has a CLogP value not greater than 1.5 and is present in an amount from 0.00025 to 1% by weight of the composition.
THE BEST MODE FOR CARRYING OUT THE INVENTION
The perfume substance (B) to be used in the present invention is required to have an aromatic ring, a pyran ring or a furan ring and at least one selected from a carbonyl group, an ether bond, a carboxyl group and a nonaromatic unsaturated bond.
The term “perfume substance” as used herein means an odorant used as a perfume for imparting a pleasant scent.
The perfume substance should have a CLogP value not greater than 1.5, preferably, within a range of from −1.5 to 1.5. At the CLogP value exceeding 1.5, perfume retentivity cannot always be enhanced.
The term “CLogP value” as used herein means a 1-octanol/water partition constant (Log Pow) of a chemical substance and is a value determined by calculation based on the f value method (hydrophobic fragment constant method). The value of CLogP can therefore easily be determined by calculation based on the chemical structure of a perfume substance. Described specifically, it can be determined by decomposing the perfume substance to fragments and integrating the hydrophobic fragment constants (f values) of them.
Among the perfume substances (B) to be used in the present invention, specific examples of the aromatic-ring-containing one include vanillin, cinnamic alcohol, heliotropin, coumarin, 2-methyl-3-(3,4-methylenedioxy-phenyl)-propanal, 4-(4-hydroxyphenyl)-2-butanone, benzaldehyde, anise alcohol, 3,4-dimethoxybenzaldehyde, heliotropyl acetate, phenylacetaldehyde dimethyl acetal, phenylacetaldehyde glyceryl acetal, phenylacetic acid and phenoxyethyl alcohol.
Among the perfume substances (B), specific examples of the pyran-ring-containing one include maltol (3-hydroxy-2-methyl-4H-pyran-4-one) and ethylmaltol (2-ethyl-3-hydroxy-4H-pyran-4-one).
Among the perfume substances (B), specific examples of the furan-ring-containing one include sugar lactone (4,5-dimethyl-3-hydroxy-5H-furan-2-one) and furaneol (2,5-dimethyl-4-hydroxy-2H-furan-3-one).
The above-exemplified perfume substances have so far been employed but a composition which permits drastic heightening of their perfume retentivity is utterly unknown. They have been used only for general purposes. Their use for general purposes are described in guiding books of perfume such as “The Chemistry of Perfume” (ed. by The Chemical Society of Japan, written by Ryoichi Akaboshi, published by Dainippon-Tosho Publishing Co., Ltd.), “The Practice of Modern Perfumery” (translated and revised edition, A. J. KRAJKEMAN Dipl. Ing Chem., A.R.I.C. published by INTERSCIENCE PUBLISHER., INC. New York), “Flower oils and Floral Compounds in Perfumery” (written by Danute Pajaujis Anonis, published by Perfumer & Flavorist Allured Publishing Corp. Carol Stream, Ill.), “Perfume and Flavor Chemicals” (written by Steffen Arctander), “Poucher's Perfumes. Cosmetics and Soap” (Ninth edition, written by W. A. Poucher, published by Chapman & Hall), “Perfumery technology” (Wells & Billot published by Artscience Industry) and the like. An example of adding the perfume substance, which is used in the present invention, for the purpose of heightening perfume retentivity, however, cannot be found anywhere in the above-described literatures. For the first time in the present invention, the present inventors have found a process for heightening perfume retentivity of a surfactant composition to be applied to hair or skin by using the above-described perfume substance.
To be more concrete, such perfume substances may be used either singly or in combination and are added in an amount of 0.00025 to 1 wt. %, preferably 0.0005 to 1 wt. % based on the total weight of the composition. Amounts less than 0.00025 wt. % cannot sufficiently heighten the perfume retentivity, while amounts exceeding 1 wt. % impair the storage stability of the composition.
When the perfume substance (B) is a compound having an aromatic ring and a carbonyl group, ether bond, carboxyl group or nonaromatic unsaturated bond, it is added in an amount of 0.25 to 1 wt. %, with 0.5 to 1 wt. % being particularly preferred.
When the perfume substance (B) is a compound having a pyran ring and a carbonyl group, ether bond, carboxyl group or nonaromatic unsaturated bond, it is added in an amount of 0.0025 to 1 wt. %, with 0.005 to 1 wt. % being particularly preferred.
When the perfume substance (B) is a compound having a furan ring and a carbonyl group, ether bond, carboxyl group or nonaromatic unsaturated bond, it is added in an amount of 0.00025 to 1 wt. %, with 0.0005 to 1 wt. % being particularly preferred.
In the present invention, it is possible to add a perfume other than the above-described ones within an extent not impairing the advantages of the present invention. Either of a synthetic perfume or natural perfume may be employed. It can be added singly or as a mixed perfume of at least two kinds.
Th
Fujikura Yoshiaki
Hasegawa Yoshihiro
Saito Shoji
Yamashita Osamu
Hardee John
Kao Corporation
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
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