JP2005053922A - Hair cosmetic and stabilization method for hair cosmetic - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prepare a hair cosmetic with minimal unpleasant smell or skin irritation even if containing a comparatively large quantity of benzyloxy ethanol, having good fragrance and excellent usability, excellent in storage stability and useful as hair dye, shampoo, hair rinse, hair treatment, hair foam, hair gel, or the like. <P>SOLUTION: The hair cosmetic is obtained by mixing 1-30 wt.% of benzyloxy ethanol containing 0.0001-1 wt.% of benzaldehyde, wherein the content of benzaldehyde in the hair cosmetic is 0.000001-0.1 wt.%. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a hair cosmetic that has almost no unpleasant odor and skin irritation, is excellent in storage stability, and can be suitably used as a hair dye, shampoo, hair rinse, hair treatment, hair foam, hair gel and the like.

  Conventionally, benzyl alcohol and benzyloxyethanol have been used as hair penetrants. Particularly in the field of hair dyes, a large number of hair dyes in which acidic dyes and hair penetrants are combined have been reported (Japanese Patent Publication No. 48-23911, Japanese Patent Publication No. 55-12407, Japanese Patent Publication No. 52-91028, JP-A-60-28913, JP-A-61-53211).

  However, in this hair dye, since a large amount of benzyl alcohol and benzyloxyethanol are used as a hair penetrating agent, there is a unique odor and the user may feel disgusted. For this reason, the odor has been masked with an appropriate fragrance and has been dealt with, but the odor has not been completely improved. In addition, some users may feel irritation such as tingling or tingling with benzyl alcohol or benzyloxyethanol.

  Furthermore, in a composition using a large amount of benzyl alcohol or benzyloxyethanol as a hair penetrating agent, the composition sometimes becomes cloudy at low temperatures or crystals are liable to precipitate, resulting in a problem in storage stability.

  Therefore, in hair cosmetics using benzyl alcohol and benzyloxyethanol, it has been desired to solve the above problems.

Japanese Patent Publication No. 48-23911 Japanese Patent Publication No.55-12407 JP 52-91028 A JP-A-60-28913 JP 61-53211 A

  The present invention has been made to meet the above-mentioned demands, and even if it contains benzyl alcohol and / or benzyloxyethanol, it has almost no unpleasant odor and skin irritation, has a good fragrance, and excellent usability. And it aims at providing the hair cosmetics excellent in storage stability.

  As a result of intensive studies to achieve the above object, the present inventor has found that the above object can be achieved by using benzyl alcohol or benzyloxyethanol containing a specific amount of benzaldehyde.

  That is, as a result of pursuing a common synthetic raw material for benzyl alcohol and benzyloxyethanol, the present inventor has found that both components contain benzaldehyde. The basic synthesis method of both components is obtained by, for example, boiling benzaldehyde with an aqueous sodium hydroxide solution, adding a concentrated aqueous sodium carbonate solution, separating the produced benzyl alcohol by steam distillation, and distillation under reduced pressure. Further, benzyloxyethanol is obtained by adding ethylene oxide to benzyl alcohol, and benzaldehyde remains as an unreacted product.

  As a result of repeated researches focusing on the remaining benzaldehyde, the present inventor has used benzyl alcohol and / or benzyloxyethanol having a benzaldehyde content of 0.0001 to 1% by weight as described above. The problem of hair cosmetics containing alcohol and benzyloxyethanol is satisfactorily solved, and even if a large amount of benzyl alcohol and / or benzyloxyethanol is added, it has a moderately accented fragrance and almost no skin irritation In addition, the present inventors have found that a hair cosmetic with excellent storage stability can be obtained, and have completed the present invention.

Therefore, the present invention
[1]. A hair cosmetic comprising 1 to 30% by weight of benzyloxyethanol containing 0.0001 to 1% by weight of benzaldehyde, wherein the benzaldehyde content in the hair cosmetic is 0.000001 to 0.001. 1% by weight hair cosmetic,
[2]. The hair cosmetic according to [1], which is a hair dye,
[3]. Furthermore, the hair dye according to [2], comprising 0.01 to 2% by weight of a pigment component,
[4]. Furthermore, the hair dye according to [2] or [3], comprising an organic acid or a salt thereof,
[5]. In a hair cosmetic comprising benzyl alcohol and / or benzyloxyethanol containing 0.0001 to 1% by weight of benzaldehyde in an amount of 1 to 30% by weight, the benzaldehyde content in the hair cosmetic is 0.000001. Provided is a method for stabilizing hair cosmetics, which is adjusted to ˜0.1% by weight.

  The hair cosmetic composition of the present invention has almost no unpleasant odor or skin irritation even if it contains a relatively large amount of benzyl alcohol and / or benzyloxyethanol, has a good fragrance, and excellent usability. It has excellent storage stability and can be suitably used as a hair dye, shampoo, hair rinse, hair treatment, hair foam, hair gel, etc., particularly as a hair dye.

  Hereinafter, the present invention will be described in more detail. The hair cosmetic composition of the present invention contains benzyl alcohol and / or benzyloxyethanol containing benzaldehyde in a specific range.

  In this case, the content of benzaldehyde in benzyl alcohol and benzyloxyethanol is 0.0001 to 1% by weight, preferably 0.0001 to 0.5% by weight, more preferably 0.0001 to 0.1% by weight, respectively. It is. Since benzaldehyde is originally one of the fragrance components, the hair cosmetic composition has a very good fragrance when the content in benzyl alcohol and benzyloxyethanol is within the above ranges, but the content is the above value. If it exceeds 1, the hair cosmetic will have an unpleasant scent, and if it is lower than the above value, the unique fragrance derived from benzyl alcohol and benzyloxyethanol will be lost and the value as a fragrance will be lost. Moreover, when there is more content than the said value, the benzaldehyde may have been worried about irritation conventionally, and the user who causes skin irritation will appear. Furthermore, benzaldehyde is easy to oxidize, and if it is left alone in the air, it will crystallize to become benzoic acid. If the benzaldehyde content is higher than the above value, it may become cloudy at low temperatures or crystals may precipitate. The storage stability of hair cosmetics is greatly reduced.

  Benzyl alcohol and benzyloxyethanol containing such a specific amount of benzaldehyde can be produced by a conventional method. The benzyl alcohol can be obtained, for example, by boiling benzaldehyde with an aqueous sodium hydroxide solution, adding a concentrated aqueous sodium carbonate solution, separating the resulting benzyl alcohol by steam distillation, and distillation under reduced pressure. Benzyloxyethanol can be produced by adding ethylene oxide to this benzyl alcohol. Benzaldehyde remains as an unreacted substance in the above reaction, and the benzaldehyde content in benzyl alcohol and benzyloxyethanol can be adjusted by distillation operation or the like.

  Furthermore, in the present invention, the benzaldehyde content in the hair cosmetic is preferably in the range of 0.000001 to 0.1% by weight, particularly 0.000001 to 0.01% by weight. If the content is less than the above value, the above-mentioned satisfactory effects may not be obtained. If the content exceeds the above value, an unpleasant scent or irritation may occur or storage stability may be reduced.

  The blending amount of the benzyl alcohol and / or benzyloxyethanol is preferably adjusted so that the benzaldehyde content in the hair cosmetic is within the above range, but is less than 30% by weight of the entire hair cosmetic, particularly 1 to 20% by weight, especially 5 to 10% by weight is preferred. If the amount exceeds the above value, skin irritation may be exhibited.

  The hair cosmetic composition of the present invention can be prepared according to a conventional method by adding optional components in addition to the above essential components. Moreover, the dosage form is not specifically limited, It can be set as various dosage forms, such as an emulsion, a suspension, a gel, a transparent solution, an aerosol, according to a use. Furthermore, as a use, it can be used for hair cosmetics in general, for example, hair dyes, shampoos, hair rinses, hair treatments, hair foams, hair gels, etc., but it is particularly suitable for use as hair dyes.

  When the hair cosmetic composition of the present invention is used as a hair dye, pigment components such as acidic dyes and natural pigments can be blended as optional components. Examples of acid dyes include nitro dyes, azo dyes, nitroso dyes, triphenylmethane dyes, chitin sun dyes, quinoline dyes, anthraquinone dyes, indigo dyes, and the like. Specifically, red No. 2, red No. 3, red 102, red 104, red 105, red 106, yellow 4, yellow 6, green 3, blue 1, blue 2, red 201, red 227, red 220, red 230 , Red 231, red 232, orange 205, orange 207, yellow 202, yellow 203, green 201, green 204, green 206, blue 202, blue 203, blue 205, bracket Color 201, Red 401, Red 602, Red 503, Red 504, Red 506, Orange 402, Yellow 402, Yellow 403, Yellow 406, Yellow 407 No., edge color No. 401, green 402 No., purple No. 401, black No. 401 or the like is used. Among these acidic dyes, from the viewpoint of hair dyeing power, Red No. 2, Red No. 102, Red No. 106, Yellow No. 4, Green No. 3, Blue No. 1, Red No. 201, Orange No. 205, Yellow No. 203, Green 201, green 204, blue 205, yellow 403, purple 401, black 401, among which red 106, orange 205, yellow 403, purple 401, black 401 are particularly preferred. . These acidic dyes can be used alone or in combination of two or more.

  Examples of natural pigments include carotenoids, anthraquinones, flavonoids (anthocyanins, chalcones, flavones), porphyrins, diketones, betacyanines, azophyllones, and more specifically, red pigments. , Anato pigment, paprika pigment, gardenia yellow pigment, extracted carotene, cochineal pigment, lac pigment, red cabbage pigment, perilla pigment, purple corn pigment, elderberry pigment, boysenberry pigment, grape skin pigment, grape juice pigment, purple potato pigment , Safflower yellow pigment, safflower red pigment, cucumber pigment, onion pigment, cacao pigment, sandalwood pigment, spirulina pigment, chlorophyll, turmeric pigment, bered, red potato red pigment, red potato yellow pigment, gardenia blue pigment, gardenia red pigment Etc. are used. Among these, from the viewpoint of hair dyeing power, particularly preferred are red dye, paprika dye, cochineal dye, lac dye, cuilliant dye, onion dye, cacao dye, sandalwood dye, gardenia blue dye, gardenia red dye and the like. These natural pigments can be used alone or in combination of two or more.

  The blending amount of the pigment component is preferably 0.01 to 2% by weight of the entire hair cosmetic, and particularly 0.02 to 1% by weight from the viewpoint of hair dyeing power and cost. If the blending amount of the pigment component is less than the above value, the hair dyeing effect may not be sufficiently exhibited, and if it exceeds the above value, the hair dyeing degree is good, but it is removed when it is accidentally attached to the skin or clothing. It may be difficult to do.

  Moreover, the hair cosmetic composition of the present invention is optionally provided with pH buffering agents, surfactants, thickeners such as hydroxyethylcellulose and xanthan gum, fragrances other than benzaldehyde, preservatives, ultraviolet absorbers, and antioxidants as necessary. Agents, pearlizing agents, bactericides, and the like can be added as long as the effects of the present invention are not impaired. In order to improve the feel of hair, silicone derivatives such as dimethylpolysiloxane, amino-modified silicone, and polyether-modified silicone can also be blended.

  Among these, as a pH buffer, 1 type (s) or 2 or more types chosen from the organic acid which has a buffer action in the range of pH 2-7.5, an inorganic acid, and its salt can be used. Examples of the organic acid and inorganic acid include glycolic acid, citric acid, lactic acid, succinic acid, tartaric acid, fumaric acid, malic acid, levulinic acid, butyric acid, valeric acid, oxalic acid, maleic acid, mandelic acid, phosphoric acid, sulfuric acid, Nitric acid etc. are mentioned. Examples of these salts include sodium salts, ammonium salts, potassium salts, alkanolamine salts such as triethanolamine salts, and the like. In addition, the compounding quantity of the compound which gives buffer capacity is not prescribed | regulated in particular, It changes with kinds of compound which provides buffer capacity, and can adjust it suitably.

  Surfactants include α-olefin sulfonates, alkane sulfonates, fatty acid alkyl ether carboxylates, N-acyl amino acid salts and other anionic surfactants, alkylbetaines, alkylamidobetaines, hydroxysulfobetaines and the like. Surfactants, cationic surfactants such as mono- or dialkyl quaternary ammonium salts, nonionic surfactants such as polyoxyethylene alkyl ether, and the like can be used. Moreover, cationized cellulose, cationized starch, cationized guar gum, diallyl quaternary ammonium salt polymer, diallyl quaternary ammonium salt / acrylamide copolymer, hydroxyethyl cellulose dimethyl diallyl quaternary ammonium salt polymer and the like can be mentioned. In addition, since the compounding quantity of surfactant changes with compositions of hair cosmetics etc., it is not specifically limited, It can adjust suitably.

  When the hair cosmetic composition of the present invention is used as a hair dye, the hair dye is applied to the hair, left for about 5 to 30 minutes, and then washed with a shampoo.

  EXAMPLES Hereinafter, although an Example and a comparative example are shown and this invention is demonstrated concretely, this invention is not restrict | limited to the following Example.

[Examples 1-4, Reference Examples 1-7, Comparative Examples 1-6]
A hair cosmetic composition having the following composition was prepared by a conventional method, and a performance test was conducted by the following method. The results are shown in Tables 1 and 2.
<Aroma evaluation>
Each cosmetic was sniffed by five panelists and evaluated according to the following criteria.
◯: Just good fragrance Δ: Slightly strong fragrance or fragrance with slightly weak accent ×: Very strong fragrance or fragrance without any accent <skin irritation>
0.2 ml of each cosmetic was applied to the forearms of 5 panelists and left for 15 minutes. The irritation at that time (burning, tingling, etc.) was evaluated according to the following criteria.
○: No irritation △: Slight irritation ×: Quite irritation <Storage stability>
50 ml of each composition was placed in a glass bottle and left at -5 ° C for 1 month. The state at that time was visually evaluated.
○: No change △: Slightly cloudy or slightly crystallized ×: Slightly cloudy or fairly crystallized

[Reference Example 5]
A shampoo having the composition shown below was produced by a conventional method.
(weight%)
(1) Polyoxyethylene (3) Lauryl sulfosuccinate 15
Disodium acid (2) N-lauroyl-N′-carboxymethyl-N′-15
(2-Hydroxyethyl) ethylenediamine triethanolamine salt (3) Palm oil fatty acid diethanolamide 3
(4) Amidopropyl betaine laurate 1
(5) Cationized cellulose 0.5
(Polymer JR400, manufactured by UCC)
(6) Benzyl alcohol 3
(Benzaldehyde content 0.1%)
(7) Fragrance 0.5
(8) Appropriate amount of dye
(9) Purified water balance
Total 100.0
This shampoo has a good aroma, no skin irritation, excellent stability at low temperatures, and of course the basic performance of the shampoo, foaming during shampooing, feel during rinsing and drying, etc. It was.

[Reference Example 6]
A rinse having the following composition was produced by a conventional method.
(weight%)
(1) Stearyl trimethyl ammonium chloride 0.5
(2) N-2- (3-methylhexyl) -7-methyl 0.5
-1-decyl-N-dodecyl-N, N-dimethylammonium chloride (3) cetyl alcohol 3
(4) Polyoxyethylene stearyl ether 1
(5) Propylene glycol 3
(6) Benzyl alcohol 3
(Benzaldehyde content 0.1%)
(7) Fragrance 0.5
(8) Appropriate amount of dye
(9) Purified water balance
Total 100.0
This rinse showed a good aroma, no skin irritation, excellent stability at low temperatures, and of course the basic performance of the rinse, the feeling when rinsed and dried, and the like.

[Reference Example 7]
A hair foam having the composition shown below was produced by a conventional method.
(weight%)
(1) Cationized cellulose 1
(Polymer JR400, manufactured by UCC)
(2) (N-methacryloxyethyl) -N, N-di 1
Methylammonium-α-N-methylcarboxyl betaine / methacrylic acid alkyl ester copolymer (3) Polyoxyethylene / methyl polysiloxane 0.5
Copolymer (4) Polyoxyethylene stearyl ether 0.5
(5) Ethanol 15
(6) Benzyl alcohol 3
(Benzaldehyde content 0.1%)
(7) Fragrance 0.5
(8) Dye proper amount (9) Liquefied petroleum gas 6
(10) Purified water balance
Total 100.0
This hair foam exhibited a good aroma, was not irritating to the skin, was excellent in stability at low temperatures, and was of course excellent in setting power and conditioning properties of the hair foam.

Claims (5)

  A hair cosmetic comprising 1 to 30% by weight of benzyloxyethanol containing 0.0001 to 1% by weight of benzaldehyde, wherein the benzaldehyde content in the hair cosmetic is 0.000001 to 0.001. Hair cosmetic that is 1% by weight.   The hair cosmetic composition according to claim 1, which is a hair dye.   Furthermore, the hair dye of Claim 2 formed by mix | blending 0.01-2 weight% of pigment components.   Furthermore, the hair dye of Claim 2 or 3 formed by mix | blending organic acid or its salt. In a hair cosmetic comprising benzyl alcohol and / or benzyloxyethanol containing 0.0001 to 1% by weight of benzaldehyde in an amount of 1 to 30% by weight, the benzaldehyde content in the hair cosmetic is 0.000001. A method for stabilizing hair cosmetics, which is adjusted to ˜0.1% by weight.