Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Cosmetic – antiperspirant – dentifrice
Reexamination Certificate
1999-03-15
2001-10-02
Page, Thurman K. (Department: 1615)
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Cosmetic, antiperspirant, dentifrice
C424S063000, C424S069000
Reexamination Certificate
active
06296860
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to novel coated pigments and extender pigments, particularly novel coated material in a finely pulverized (powdered) state, that is novel coated pigments and extender pigments, usable for cosmetics, and novel cosmetics containing the coated pigments and extender pigments.
More particularly, it relates to the pigments and extender pigments, coated with a mixture comprising at least 14 acylated amino acids or salts, with the amino acids being obtainable from or obtained on total hydrolysis of any one of animal proteins, such as silk and pearl, and plant proteins, such as wheat and soybeans, and cosmetics containing such pigments and extender pigments. The pigments and extender pigments, coated with a mixture comprising at least 14 acylated amino acids, wherein said amino acid may be in the salt form in one or more of 14 amino acids, presents extremely smooth feeling and exhibits superior cohesion to skin and hair (biocompatibility), so that cosmetics comprising the pigments and extender pigments is retained to be highly promising as cosmetics exhibiting these desirable properties.
2. Description of the Related Art
The pigments and extender pigments, added to cosmetics, especially inorganic pigments, are poor in its ability to spread (spreadability), hard and heavy (coarse), that is devoid of elasticity, and present a dragging feeling, thus giving physical irritation to the skin. Moreover, since it is inorganic, it exhibits poor affinity to skin. Meanwhile, good affinity to the skin means having light touch on the skin and favorable feeling to the skin. For overcoming these defects, a number of types of coated pigments and extender pigments, that is surface-processed pigments and extender pigments, has been proposed. For example, there are so far known a number of different methods, such as a method of surface-coating with ester oils, metal soap, lecithin, silicone oil or perfluoro alkyl oil, or a method of coating with a sole acylated amino acid or an acylated form of a polypeptide, which is a polymer of the amino acid see Japanese Patent Kokai Publication JP-A-61-73775.
PROBLEMS TO BE SOLVED BY THE INVENTION
In the course of the completion to the present invention, the following problems have also been found by the present inventors and the present invention.
In view of the above related art references, the above-mentioned known techniques suffer from a number of drawbacks.
The pigments and extender pigments, coated with ester oils, metal soap, lecithin, silicone oil, or perfluoro alkyl oil, while presenting a smooth tactile feeling and a reduced physical stimuli to the skin, is poor in compatibility to the human body, such that it is poor in affinity to the skin.
It has been known to coat the pigments and extender pigments with amino acids or polypeptides to improve affinity to the skin, as disclosed in Japanese Patent Kokoku Publication JP-B-1-50202, and Japanese Patent Kokai Publications JP-A-61-73775, JP-A-61-10503, JP-A-61-7207, JP-A-61-69709, JP-A-5-186706, JP-A-3-200879, JP-A-9-328413, and JP-A-10-226626. Although these publications state that the coated pigments and extender pigments exhibits smooth tactile feeling and high affinity to the skin, the meritorious effect of the coated pigments and extender pigments can not be said to be optimum.
The pigments and extender pigments, coated with N-acylated amino acid, as described in Japanese Patent Kokoku, Publication JP-B-1-50202, such as with N-acyl-L-glutamic acid, N-methyl-N-methyl glycine or with N-acyl-N-methyl-&bgr;-alanine, while having a smooth tactile feeling, is not optimum in affinity to the skin.
The pigments and extender pigments, coated with N-acylated peptide, is poor in smoothness and also has objectionable physical stimuli, due to the hard and heavy (coarse) feeling associated with polypeptides (refer to Japanese Patent Kokai Publication JP-A-61-73775).
The pigments and extender pigments, coated with N-mono long-chain basic amino acid, while presenting smooth tactile feeling, is not optimum in affinity to the skin due to the presence of basic amino acids (see Japanese Patent Kokai Publications JP-A-61-10503, JP-A-61-7207, JP-A-61-69709 and JP-A-5-186706).
Similarly to the subject-matter of the Japanese Patent Kokoku Publication JP-B-1-50202, the pigments and extender pigments coated with N-acylated aspartic acid, while presenting smooth tactile feeling, is not optimum in affinity to the skin (see Japanese Patent Kokai Publication JP-A-3-200879).
Therefore, similarly to the pigments and extender pigments, coated with the N-acylated peptide, the above pigments and extender pigments is also not desirable in smoothness of touch or affinity to the skin (As for the pigments and extender pigments coated with the N-acylated silk peptide, disclosed in Japanese Patent Kokai Publication JP-A-9-328413, see Japanese Patent Kokai Publication JP-A-61-73775.).
The pigments and extender pigments, coated with sericin, which contains a large quantity of serine, as one of hydroxy-amino acids retained to be usable in place of AHA (&agr;-hydroxy acid), is improved in affinity to the skin (see Japanese Patent Kokai Publication JP-A-10-226626). However, smooth tactile feeling can not be obtained with this material. For the above reason, it has long been a desideratum to develop coated pigments and extender pigments having agreeable feeling on application and superior affinity to the skin or hair.
It is an object of the present invention to provide pigments and extender pigments having a smooth tactile feeling when used in cosmetics and excellent cohesion to the skin or hair, that is, having superior affinity to the skin or hair (biocompatibility). It is another object of the present invention to provide cosmetics having the above desirable properties by having the above pigments and extender pigments contained therein.
SUMMARY OF THE INVENTION
The present inventors have conducted perseverant researches towards resolving the above problems and found that the coated pigments and extender pigments comprising pigments and extender pigments, which is a material in a finely pulverized state, coated with a mixture comprising at least N-acyl forms of 14 amino acids specified by glycine, L-alanine, L-valine, L-leucine, L-isoleucine, L-phenylalanine, L-proline, L-threonine, L-serine, L-arginine, L-histidine, L-lysine, L-aspartic acid and L-glutamic acid, more preferably, coated with a mixture comprising at least N-acyl forms, of the 14 amino acids, obtainable or obtained on acylating amino acids comprising at least the 14 amino acids, represented by the following general formula:
and being obtainable on total hydrolysis of at least one protein type particularly preferably derived from animal proteins, such as silk and pearl, and plant proteins, such as wheat and soybeans,
wherein R
1
is an alkyl group of C8 to C22 carbons which may contain carbon-carbon double bond and/or triple bond in the molecule, such as alkenyl, saturated or unsaturated, or a hydrocarbon group of the alicyclic structure of C8 to C22 carbons, saturated or unsaturated,
is any amino acid residue of the 14 amino acids, specifically, any of glycine, alanine, valine, leucine, isoleucine, phenylalanine, proline, threonine, serine, arginine, histidine, lysine, aspartic acid and glutamic acid residues, M is one of H, Na, K, polyvalent metal, such as Ba, Zn, Ca, Mg, Fe, Zr, Co, Al and Ti, ammonium, and an onium of organic alkanol amines, such as monoethanol amine, diethanol amine, triethanol amine, 2-amino-2-methyl-propanol, 2-amino-2-methyl-1, 3-propanediol and triisopropanol amine,
has extremely smooth tactile feeling and superior affinity to skin and hair and moreover is particularly suited to addition to cosmetics. In the above cases, such N-acyl form may be in the salt form, and therefore such N-acyl form includes one in the free form and/or the salt form.
This finding led to the completion of the present invention.
Specifically, the present invention contains the followings:
1. The coat
Hasegawa Yukio
Miyoshi Taizo
Ohara Ryo
Armstrong Westerman Hattori McLeland & Naughton LLP
Fubara Blessing
Miyoshi Kasei, Inc.
Page Thurman K.
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