Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Cosmetic – antiperspirant – dentifrice
Reexamination Certificate
1998-04-27
2001-02-06
Criares, Theodore J. (Department: 1617)
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Cosmetic, antiperspirant, dentifrice
C424S070110, C424S070140, C514S887000
Reexamination Certificate
active
06183759
ABSTRACT:
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a cosmetic composition and acylated peptides suitable for incorporating in said cosmetic composition.
PRIOR ART
In recent years, there has been a progressive increase in the damage to hair, such damage includes an increase in the hydrophilic nature of the surface of hair, the damage by hair cuticles on the surface and even structural change in the cortex of the hair, damage due to various chemical treatment and beauty treatment, including permanent wave, hair-dyeing and so on, and also damage due to the effect of ultraviolet rays and waste gases. Such damage to hair may cause split hair, broken hair, poor gloss and color, poor feel to the touch and the like. As a measure for preventing such damage to hair or recovering the original nature of damaged hair, there have been proposed various cosmetic compositions for hair, including shampoo, hair rinse, hair treatment and the like, which contain acylated peptides imparted with an ability of surface-activation and an ability of decreasing friction on the surface of hair by acylating, with a higher fatty acid, a hydrolysate of a protein which is known to have an ability to retain moisture. For example, the patent publication JP-A-63-105000 discloses various cosmetic compositions for hair containing an acylated peptide which is obtained by the acylation of a casein-derived peptide with an acyl group having 8-20 carbon atoms. The patent publication JP-B-4-60086 discloses a shampoo containing an acylated peptide obtained by acylating a peptide having an average molecular weight of 200-1,000 with a fatty acid halide having 8-22 carbon atoms.
It is also proposed to incorporate these acylated peptides into cosmetic composition for skin in order to give protection of and retention of moisture in the skin.
Satisfactory effects for the prevention of damage to hair and recovery from damaged hair, however, has not been obtained by incorporating these known acylated peptides into a cosmetic composition for hair. Particularly unsatisfactory are the effects on the feel of the hair, the feeling during use or the like.
In addition, unsatisfactory is the feel to the touch, the feeling during use or the like has been shown for cosmetic compositions of the poor art for skin.
As a result of extensive studies for solving the problems of the known cosmetic composition for hair and cosmetic composition for skin, the present inventors have found that satisfactory effect for the prevention of damage to hair and the recovery from damaged hair, and further, a drastic improvement in feel to the touch, moist feel, gloss and the like can be obtained by incorporating, in a cosmetic composition for hair, an acylated peptide or a salt thereof which is obtainable by condensing a protein-derived peptide produced by hydrolysis of a protein, with a specific lanolin fatty acid.
The present inventors have further found the fact that a cosmetic composition containing such acylated peptide or a salt thereof has sufficient ability to protect and retain skin and excellent feeling upon use. Thus, the present invention has been completed.
DISCLOSURE OF THE INVENTION
The present invention provides an acylated peptide or a salt thereof which is obtainable by condensing a protein-derived peptide produced by hydrolysis of a protein, with a lanolin-derived non-hydroxyl fatty acid containing 30-45% by weight of iso-type fatty acid of the following formula (I), 30-50% by weight of anteiso-type fatty acid of the following formula (II), 10-30% by weight of normal type fatty acid of the following formula (III):
*iso-type fatty acid
CH
3
—CH (CH
2
)—CH
2
) n-COOH (n=6~2 7) (I)
*anteiso-type fatty acid
CH
3
CH
2
—CH (CH
3
)—(CH
2
) n-COOH (n=6~2 6) (II)
*normal type fatty acid
CH
3
—(CH
2
) n-COOH (n=8~2 8) (III)
and less than 10% by weight of hydroxyl fatty acids, the total amount of said iso-type fatty acid and said anteiso-type fatty acid being at least 60% by weight.
The term “hydroxyl fatty acid” means a fatty acid having one or more hydroxyl groups in the molecule. Examples of the hydroxyl fatty acid include the following fatty acid having a hydroxyl group at its &agr;-position or &ohgr;-position:
CH
3
(CH
2
) n-CH (OH) COOH (n=7~2 9)
CH
3
CH (CH
3
)—(CH
2
) n-CH (OH) COOH (n=7~2 9)
CH
3
CH
2
—CH (CH
3
)—(CH
2
) n-CH (OH) COOH (n=5~2 7)
CH
2
(OH)—(CH
2
) n COOH (n=2 0~3 4).
The present invention further provides a cosmetic composition, for example, a cosmetic composition for hair, a cosmetic composition for skin or the like, containing an acylated peptide or a salt thereof which is obtainable by condensing a protein-derived peptide produced by hydrolysis of a protein, with a lanolin-derived non-hydroxyl fatty acid containing 30-45% by weight of iso-type fatty acid of formula (I), 30-50% by weight of anteiso-type fatty acid of formula (II), 10-30% by weight of normal type fatty acid of formula (III) and less than 10% by weight of hydroxyl fatty acids, the total amount of said iso-type fatty acid and said anteiso-type fatty acid being at least 60% by weight. (Hereinafter, said lanolin-derived non-hydroxyl fatty acid is referred to as “non-hydroxyl lanolin fatty acid”.)
The average number of carbon atoms of the iso-type fatty acid of formula (I), the anteiso-type fatty acid of formula (II) and the normal type fatty acid of formula (III) in the non-hydroxyl lanolin fatty acid used in the present invention are preferably 15 to 24 and more preferably 17 to 22. The content of branched fatty acids, that is, iso-type fatty acid and anteiso-type fatty acid, having 20 or more carbon atoms is preferably less than 40% by weight.
Further, the content of the iso-type fatty acid of formula (I), the anteiso-type fatty acid of formula (II) and the normal type fatty acid of formula (III) in the non-hydroxyl lanolin fatty acid used in the present invention are preferably 30-35% by weight, 35-45% by weight and 12-16% by weight, respectively.
The non-hydroxyl lanolin fatty acid used in the present invention can be produced by a process described in the patent publication JP-A-6-293614. That is, they can be obtained by converting a known lanolin fatty acid or a lower alcohol ester thereof to a orate thereof which is then distilled to separate the non-hydroxyl lanolin fatty acid or a lower alcohol ester thereof from the borate of a hydroxyl lanolin fatty acid or a lower alcohol ester thereof. Hoverer, the process for the production thereof is not limited and may be any process that can give a fatty acid having the above-described composition.
The protein-derived peptide used in the present invention can be obtained by hydrolyzing a protein with an acid, an alkali or a proteolytic enzyme. The molecular weight of the protein-derived peptide is usually 100-30,000 and preferably 200-5,000. (Molecular weight of protein-derived peptide in this specification means number average molecular weight unless otherwise indicated.) It is possible to adjust the molecular weight of the protein-derived peptide by appropriately selecting the amount of an acid, an alkali or a proteolytic enzyme, the reaction temperature or the reaction time. The production of the protein-derived peptide used in the present invention can be carried out by a process and under conditions similar to those described in the patent publication JP-A-63-105000, JP-B-4-60086 and others.
The protein used for the production of the peptide is preferably a natural protein. Among natural proteins, collagen, keratin, silk protein, casein, soybean protein and wheat protein are particularly preferred. Soybean protein is a protein obtained from soybean and the like, which can be obtained, for example, by extracting defatted soybean seed with water, followed by precipitation at isoelectric point at pH 4-5. Wheat protein is a protein obtained from wheat and the like, which can be obtained, for example, by extracting defatted wheat seed with water, followed by precipitation at isoelectric point. Silk protein
Hattori Nobuaki
Kobayashi Sueko
Okumura Masakazu
Yoshioka Masato
Birch & Stewart Kolasch & Birch, LLP
Criares Theodore J.
Nippon Fine Chemical Co., Ltd.
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