JP5936222B2 - Hair treatment agent - Google Patents

Description

  The present invention relates to a hair treatment agent in which a feeling of remaining hands when applied to hair is suppressed for the hand.

  So-called hair treatment agents such as hair styling agents and hair protection agents include emulsions such as emulsions and creams, and oily ingredients are appropriately blended depending on the purpose such as imparting flexibility to hair and protecting and repairing hair. Yes. Since such a hair treatment agent can be used by taking it once and then applying it to the hair, for example, it has the merit that a desired hair design can be easily made, while remaining in the palm. There is also a problem that the hair treatment agent induces a feeling of stickiness and a lingering hand.

  Conventionally, various techniques for reducing the stickiness of applied hair in hair treatment agents have been studied. For example, Patent Document 1 and Patent Document 2 contain an acrylic polymer having an ability to form a film, an acrylic acid / alkyl methacrylate copolymer, and an oil component to suppress stickiness of hair after application. There has been proposed a hair treatment agent (hair cosmetic material) that makes it possible.

  However, such a conventional hair treatment agent is not necessarily able to suppress satisfactorily the above-mentioned feeling of remnants.

JP 2009-256257 A JP 2009-286751 A

  This invention is made | formed in view of the said situation, The objective is to provide the hair treatment agent by which the feeling of the remainder of the hand after taking in a hand and applying to hair was suppressed.

  The hair treatment agent of the present invention that has achieved the above-mentioned object is (A) acrylic acid / (meth) alkyl acrylate copolymer, (B) alkali agent, (C) nonionic surfactant, (D) The oily component which is liquid at 25 ° C and (E) water are blended, and the blending amount of the oily component which is liquid at 25 ° C which is the component (D) is 2 to 40% by mass It is.

  In addition, the “alkyl (meth) acrylate” referred to in the present specification means to include both alkyl acrylate and alkyl methacrylate.

  ADVANTAGE OF THE INVENTION According to this invention, the hair treatment agent by which the feeling of the remaining hands after taking in a hand and applying to hair could be suppressed can be provided.

  In the emulsification type hair treatment agent containing an oil component, it is estimated that various factors are included in the background causing the above-mentioned feeling of remnant, and one of them is the oil component in the hair treatment agent. The influence of the state of dispersion is considered.

  For example, in the case of an emulsion in which an oily component is dispersed in an aqueous medium containing water, it is common to form and maintain the emulsified state using a surfactant that is an amphiphilic substance having an emulsifying action. Has been. The surfactant is adsorbed on the interface between the aqueous component and the oil component to form a liquid crystal, whereby the oil component is made into fine oil droplets and dispersed in the aqueous medium. In the emulsion, it is known that the viscosity of the emulsion increases because the contribution of structural viscosity increases as the particle size of the fine oil droplets decreases. Because it is easy to physically stick to the palm, you will feel a strong feeling of the hand. In addition, in emulsions containing fine oil droplets, since the oil droplets are stably dispersed, it is difficult to release oily components from the emulsion well and attach them to the hair when applied to the hair. This is thought to increase the feeling of remaining because the component tends to remain on the palm.

  As a result of intensive studies, the present inventors combined (A) acrylic acid / (meth) alkyl acrylate copolymer, (B) alkali agent, and (C) nonionic surfactant, (E) It has been found that (D) the above-mentioned problem of feeling of remnants can be solved satisfactorily by forming an emulsion in which oil droplets of a liquid oil component are dispersed at 25 ° C. in water.

  In the hair treatment agent of the present invention, the (A) component acrylic acid / (meth) alkyl acrylate copolymer is neutralized by the (B) component alkaline agent, thereby being the (D) component. Forms a hydrated gel while taking in oil droplets of the oil component, and stabilizes the oil droplets taken in the hydrated gel in the water as component (E) by the action of the nonionic surfactant as component (C) It is thought that they can be dispersed and maintained. And since said hydration gel can discharge | release an oil droplet comparatively easily when external force is applied, when a hair treatment agent is applied to hair, the oil-based component which is (D) component discharge | releases easily. Since the amount of the oil component (D) component in the hair treatment agent that is attached to the hair and remains in the palm is very small, it can be considered that the above-mentioned feeling of remnant can be satisfactorily suppressed.

  In addition, in the hair treatment agent of the present invention, the oil component (D) component is released from the hair treatment agent when the hair is applied, as compared with the conventional hair treatment agent that is made into an emulsion only with the surfactant. Easy to attach to hair more efficiently. Therefore, according to the hair treatment agent of this invention, it is possible to draw out the effect | action by the oil-based component which is (D) component more favorably, and can improve the state of hair more favorably.

  The (A) component acrylic acid / (meth) acrylic acid copolymer of the hair treatment agent of the present invention is a copolymer of acrylic acid and (meth) acrylic acid, but (meth) acrylic. The alkyl related to the acid alkyl is preferably an alkyl having 10 to 30 carbon atoms.

  The (A) component acrylic acid / (meth) acrylic acid copolymer is neutralized with an alkali agent (B), which will be described later, so that it swells due to the action of the hydrophilic group to form a hydrated gel. Form. By blending the oil component which is component (D) described later, the lipophilic group in the structure of component (A) is adsorbed on the interface between the aqueous component and the oil component in the hair treatment agent, and the oil component is It is considered that an emulsified state is formed by incorporation into the hydrated gel.

  The blending amount of the acrylic acid / (meth) acrylic acid alkyl copolymer as the component (A) in the hair treatment agent is 0.05% by mass or more from the viewpoint of favorably forming the emulsified state of the hair treatment agent. It is preferable that it is 0.1 mass% or more. However, when there is too much compounding quantity of the (A) component in a hair treatment agent, there exists a possibility that the hair after application | coating may become hard. Therefore, the blending amount of the acrylic acid / (meth) acrylic acid alkyl copolymer as the component (A) in the hair treatment agent is preferably 0.5% by mass or less, and 0.3% by mass or less. Is more preferable.

  As described above, the alkaline agent as the component (B) plays a role of neutralizing the acrylic acid / (meth) acrylic acid copolymer as the component (A) in the hair treatment agent of the present invention.

  The alkali agent that can be used in the hair treatment agent of the present invention is not particularly limited, and examples thereof include organic substances such as monoethanolamine, diethanolamine, triethanolamine, isopropanolamine, and 2-amino-2-methyl-1-propanol. Alkali; inorganic alkali such as ammonia, sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, sodium hydrogen carbonate, potassium hydrogen carbonate, ammonium carbonate, ammonium hydrogen carbonate, etc., and only one of them is used. Or two or more of them may be used in combination.

  The blending amount of the alkaline agent as the component (B) in the hair treatment agent is such that the acrylic acid / (meth) acrylic acid alkyl copolymer as the component (A) can be neutralized so that a hydrated gel can be satisfactorily formed. The amount of Specifically, for example, the blending amount of the component (B) is preferably an amount such that the pH of the hair treatment agent is 4.5 or more, more preferably 6 or more, The amount is preferably 12 or less, and more preferably 8 or less. In addition, when pH of a hair treatment agent is too low, neutralization of (A) component may become inadequate and there exists a possibility that an emulsified state may become unstable. On the other hand, when the pH of the hair treatment agent is too high, since the hair treatment agent contains an excessive alkali agent, there is a possibility that the hair after treatment has a feeling of being dry.

  The nonionic surfactant which is the component (C) relating to the hair treatment agent of the present invention includes the acrylic acid / (meth) alkyl acrylate copolymer as the component (A) and the alkaline agent as the component (B). And (E) the water droplets of the oily component that is liquid at 25 ° C., which is the component (D) incorporated in the hydrated gel formed with the water, which is the component, and the role of stably maintaining in the hair treatment agent It is what you bear.

  Specific examples of the nonionic surfactant include, for example, coconut oil fatty acid alkyl ether, polyoxyethylene alkyl ether, polyoxyethylene hydrogenated castor oil, etc., and only one of them may be used, Two or more kinds may be used in combination. Among these nonionic surfactants, if they have a polyoxyethylene chain in the structure, the emulsified state of the hair treatment agent is stably maintained while better suppressing the decrease in feel imparted to the hair. be able to. Therefore, among the nonionic surfactants exemplified above, polyoxyethylene alkyl ether and polyoxyethylene hydrogenated castor oil are more preferable.

  The blending amount of the nonionic surfactant that is the component (C) in the hair treatment agent is preferably 0.5% by mass or more, from the viewpoint of ensuring better the effect of its use, and 1% by mass or more. It is more preferable that However, if the amount of the component (C) in the hair treatment agent is too large, the emulsified state of the hair treatment agent is switched to the emulsified state of the component (C) instead of emulsification by the action of the components (A) and (B). As a result, the effect of suppressing the feeling of remnant tends to be reduced. Therefore, it is preferable that the compounding quantity of the nonionic surfactant which is (C) component in a hair treatment agent is 3 mass% or less.

  Examples of the oily component that is liquid at 25 ° C. as the component (D) in the hair treatment agent of the present invention include macadamian nut oil, jojoba seed oil, olive oil, rosehip oil, avocado oil, persic oil, almond seed oil, Vegetable oils such as corn oil, sunflower seed oil, hybrid sunflower oil, hazelnut oil, coconut oil, mango seed oil, avocado oil unsaponified product; polyglyceryl-2 triisostearate, propylene glycol dicaprate, triglyceryl caprylate Polyhydric alcohol fatty acid esters such as butyl myristate, alkyl 2-ethylhexanoate [cetyl 2-ethylhexanoate, alkyl 2-ethylhexanoate (14, 16, 18) (the numbers in parentheses are the carbon number of the alkyl moiety) Etc.], diethyl sebacate, di malate Sostearyl, 2-hexyldecyl myristate, isopropyl myristate, polypropylene glycol-3 benzyl ether myristate (myristate PPG-3 benzyl ether), isostearyl palmitate, 2-ethylhexyl stearate, phytosteryl isostearate, dimer linoleic acid Fatty acid esters such as dimer linoleyl; alkyl glyceryl ethers such as glycerin monocetyl ether and monooleyl glyceryl ether; hydrocarbons such as plant squalane, squalane, polyethylene wax, liquid paraffin; and the like. Only seeds may be used, or two or more kinds may be used in combination.

  The blending amount of the oily component that is liquid at 25 ° C, which is the component (D) in the hair treatment agent, has better effects (effects of improving the condition and feel of the hair, protecting and repairing the hair). From the viewpoint of ensuring the above, it is 2% by mass or more, preferably 20% by mass or more, and more preferably 25% by mass or more. However, if the amount of the component (D) in the hair treatment agent is too large, the oily feeling increases and the effect of suppressing the feeling of remaining may be reduced. Therefore, the blending amount of the oily component which is liquid at 25 ° C. as the component (D) in the hair treatment agent is 40% by mass or less, and preferably 35% by mass or less.

  The hair treatment agent of the present invention uses water as component (E) as a medium. It is preferable that the compounding quantity of the water which is (E) component in a hair treatment agent is 40-90 mass%, for example.

  In the hair treatment agent of the present invention, components other than the components (A) to (E) can be blended.

  For example, when the hair treatment agent of the present invention contains at least one selected from carboxyvinyl polymer and hydroxypropyl phosphate cross-linked starch as the component (F), the effect of suppressing the above-mentioned feeling of lingering is obtained. While maintaining a good condition, it is possible to suppress an unnatural gloss caused by the hair treatment agent attached to the hair surface and a phenomenon that appears to be wet (hereinafter referred to as “wet feeling”).

  Blending amount of carboxyvinyl polymer and hydroxypropyl phosphate cross-linked starch as component (F) in hair treatment agent (when only one of carboxyvinyl polymer and hydroxypropyl phosphate cross-linked starch is blended, Yes, when both are blended, the total amount thereof is preferably 0.05% by mass or more, more preferably 0.1% by mass or more, and 0.5% by mass or less. It is preferable that it is 0.3 mass% or less.

  In addition to the above-described component (F), the hair treatment agent of the present invention may contain various components used in general cosmetics, for example, within a range not impairing the effects of the present invention. Can do. Examples of such additive components include cationic surfactants, anionic surfactants, wetting agents, antioxidants, and fragrances.

  The hair treatment agent of the present invention is used as a hair treatment agent that is used without being washed away, such as a hair styling agent or a leave-on type protective agent. In the hair treatment agent of this invention, it can be set as the structure suitable for the use by selection of an oil-based component liquid at 25 degreeC which is (D) component, and another additive component.

  About the preparation method of the hair treatment agent of this invention, the acrylic acid and the (meth) acrylic acid alkyl copolymer which are (A) component, the alkali agent which is (B) component, and the water which is (E) component, In the hydrated gel formed in (2), the oily component that is liquid at 25 ° C. as the component (D) is well incorporated, and the emulsified state is maintained well by the nonionic surfactant as the component (C) There is no particular limitation as long as it is a procedure.

  Specific examples of the preparation method include a method of preparing in the order of the following (1) to (3).

(1) A component (A) and a part of water (E) are mixed. In addition, when blending carboxyvinyl polymer or hydroxypropyl phosphate crosslinked starch as component (F), and when blending water-soluble components in addition to component (F) from component (A), these are also added to water. It is preferable to add it and mix it with water together with the component (A).

(2) The component (B) is dissolved in the remaining water of the component (E) to prepare an alkaline aqueous solution, and while stirring the mixture obtained in the above (1), the above alkaline aqueous solution is added thereto. Is gradually added. The concentration of the alkaline aqueous solution is preferably about 10% by mass.

(3) While stirring the mixture obtained in the above (2), the (C) component and the (D) component are gradually added to the hair of the present invention while confirming the mixing state. A treatment agent is obtained.

  When using the hair treatment agent of the present invention, an appropriate amount may be taken and applied to the hair.

  Hereinafter, the present invention will be described in detail based on examples. However, the following examples do not limit the present invention. In addition, in the following Table 1-Table 6, although the compounding quantity of each component is shown by% so that it may become 100% with the whole hair treatment agent, all the% is the mass%, and also in Tables 1-6 , Omitting the display of%, and displaying only the numerical value representing the blending amount.

Example 1
A hair treatment agent having the composition shown in Table 1 was prepared by the following procedure.

  First, a polymer [acrylic acid / alkyl methacrylate copolymer (alkyl methacrylate has 10 to 30 carbon atoms in the alkyl portion)] and a part of purified water were mixed. Next, while stirring the mixture, a solution in which an alkaline agent (potassium hydroxide) was dissolved in the remaining purified water was gradually added. And while stirring the mixture obtained by this, oily component [alkyl 2-ethylhexanoate (carbon number of alkyl part is 14, 16 and 18)] and nonionic surfactant [polyoxyethylene] (20E.O.) hydrogenated castor oil ("EO" is an abbreviation for ethylene oxide, and the previous value is the average number of moles added)], while gradually confirming the state of mixing. To obtain the hair treatment agent of Example 1.

Examples 2-29 and Comparative Examples 1-10
Hair treatment agents were prepared in the same manner as in Example 1, except that the compositions shown in Tables 1 to 6 were changed. When preparing a hair treatment agent containing a polymer other than the component (A) (including carboxyvinyl polymer and hydroxypropyl phosphate crosslinked starch), chelating agent, preservative, antioxidant, and polyhydric alcohol. These components were added when the first polymer was mixed with purified water.

  Using the hair treatment agents of Examples and Comparative Examples, evaluation of hand feeling and evaluation of wetness and gloss of the hair after treatment were performed by the following methods.

  A plurality of evaluation wigs [“FC121 (trade name)” manufactured by Fontaine Co., Ltd.] were prepared. Then, the hair of each wig for evaluation was trimmed to a length of about 25 cm, washed once with a shampoo [“Dess (trade name)” manufactured by Milbon, Inc.], washed with water, and dried with a dryer.

(Evaluation of the feeling of remnants)
Next, each of the five professional panelists took 5 g of each hair treatment agent in their palms and extended the hair treatment agent after applying it to the hair of each of the above evaluation wigs. The score was given according to the evaluation criteria.
The feeling of remnants is quite strong ... 2 points
There is a little feeling of remnant ... 1 point,
There is almost no feeling of remnants ... 0 points.

(Evaluation of wetness of hair after treatment)
Each of the five specialist panelists scored the appearance wetness of the hair of the evaluation wig to which the hair treatment agent was applied in the evaluation of the feel of the hand according to the following evaluation criteria.
It feels quite wet ... 2 points
I feel a little wet ... 1 point
There is almost no wet feeling ... 0 points.

Each of the above five specialized panelists scored the gloss of the hair of the evaluation wig to which the hair treatment agent was applied in the evaluation of the feeling of hand remaining according to the following evaluation criteria.
Unnatural luster comes out ... 2 points,
If anything, natural luster ... 1 point,
A natural luster has appeared ... 0 points.

Then, for each hair treatment agent of the examples and comparative examples, the scores given by the five specialist panelists were summed up for each of the feeling of hand remaining, the wetness of the hair after the treatment, and the gloss of the hair after the treatment. These evaluations were classified according to the following criteria. In the case of ◎ and ○, it can be said that the evaluation is good.
0 to 2 points
3 to 5 points
6-7 points ... △,
8 points or more.

  Each said evaluation result is written together in Tables 1-6.

  In Tables 1 to 6, “with a total of 100” in the column of purified water means that the total amount of each component other than purified water constituting the hair treatment agent is 100% by adding the amount of purified water. Means that In addition, “EO” in “Polyoxyethylene (5.5 EO) cetyl ether” described in Tables 1 to 6 is an abbreviation for ethylene oxide, and the numerical value before that is the average added mole number. It is.

  The following can be understood from Tables 1 to 6. (A) Component, (B) component, (C) component, (D) component, and (E) component are mix | blended, and the compounding quantity of (D) component is appropriate The hair treatment agent of Examples 1-29 Had a good feeling of hand remaining after it was taken on the palm and applied to the hair, and the stickiness of the palm and the feeling of slimy was suppressed. Moreover, in each hair treatment agent of Examples 17-21, 25-29 which also mix | blended (F) component in addition to said each component, the wet feeling of the hair after a process is suppressed favorably, and natural The luster can be given.

  On the other hand, the hair treatment agents of Comparative Examples 1 and 7 that do not contain the component (C), the hair treatment agents of Comparative Examples 2 to 5 that contain other polymers instead of the component (A), ( A) Hair treatment agent of Comparative Example 6 in which component is not blended, (D) Hair treatment agent of Comparative Example 8 in which the amount of component is too large, (D) Instead of component, a solid oil component at 25 ° C. is used. In the hair treatment agent of Comparative Example 9 and the hair treatment agent of Comparative Example 10 using a paste-like oily component at 25 ° C. instead of the component (D), the feeling of hand remaining after taking it on the palm and applying it to the hair Is inferior.

Claims (4)

(A) acrylic acid / (meth) alkyl acrylate copolymer,
(B) alkaline agent,
(C) a nonionic surfactant,
(D) an oily component that is liquid at 25 ° C.,
( E) water , and
(F) hydroxypropyl phosphate cross-linked starch is blended, and the blending amount of the oily component which is liquid at 25C as component (D) is 15 to 40% by mass,
A hair treatment agent characterized by being used in a method that does not wash away after being applied to hair. Furthermore, hair treating agent according to claim 1, carboxymethyl polymer is blended.   The hair treatment agent according to claim 1 or 2, wherein the nonionic surfactant as component (C) is at least one selected from polyoxyethylene hydrogenated castor oil and polyoxyethylene alkyl ether.   The hair treatment agent according to any one of claims 1 to 3, wherein a blending amount of the nonionic surfactant as the component (C) is 0.5 to 3% by mass.