JP6640093B2 - Hair composition - Google Patents

Description

  The present invention provides a hair composition, particularly a hair quality improvement that imparts firmness and stiffness to hair and that when used at the time of styling, makes the hair more voluminous and gives the hair an excellent touch and flexibility. Hair composition for hair care.

  There is a persistent complaint that the hairstyle cannot be styled as desired. In general, hair styling is often performed in a situation where it is difficult to spend time in the morning, and the expectation of consumers is to secure an assisting method for styling a desired hairstyle easily in a short time. For people who have thin and supple hair, or who have thinned hair or a reduced number of hairs with aging, it is especially difficult to style a desired hairstyle in a short time. The development of is desired. Since this trouble has existed for a long time, many proposals have been made so far. Initially, various hair styling methods were used to increase the stiffness of the hair by attaching a film-forming substance to the surface of the hair, and to give the hair a firmness and firmness, thereby facilitating styling into a voluminous hairstyle. The development and proposal of a film-forming resin for use. However, these hairdressing film-forming resins not only significantly deteriorate the feel of the hair surface and lose the flexibility of the hair, but also lose the film rigidity in high humidity conditions, and the set hairstyle Problems such as collapse or styling being easily collapsed when using a comb or the like could not be solved.

  For these, various new proposals have been made. As a method of improving the defect of the film-forming resin by using a compound used in combination, for example, a combination with a cation, a higher alcohol, or a branched ester compound (Patent Document 1), a combination with a plant extract (Patent Document 2), a plurality of cations Combined use with a polymer (Patent Document 3), combined use with a cation, an amphoteric activator, and a long-chain fatty acid alcohol (Patent Document 4). Proposals for compounds that can replace the film-forming resin include wheat protein hydrolyzate (Patent Document 5) and eucalyptus extract (Patent Document 6), combined use of cation, silicone, long-chain alcohol, and hydrogenated jojoba oil (Patent Document 7), a combination of cation, amino-modified silicone, and heavy liquid isoparaffin (Patent Document 8). Techniques for modifying the hair itself by infiltrating a compound into the hair include a method utilizing a substance having an oxidizing or reducing action (Patent Document 9), and a utilization of a hair penetration enhancer (Patent Document 10). -12) Techniques that focus on methods of applying to hair, such as compositions focusing on compositions, aerosol dosage forms (Patent Document 13), and two-part dosage forms (Patent Document 14), have been proposed. However, the problem that the hair modification is insufficient or the touch is inevitably deteriorated cannot be solved simply by adhering to the hair surface. On the other hand, the method of penetrating the improving agent into the hair cannot solve the problems such as insufficient penetration amount or poor persistence in the hair after the penetration. Does not exist.

JP 2011-098927 A JP 2011-037780 A JP 2012-232945 A JP 2012-232919 A JP 05-000921 A JP 2006-238635 A JP 2012-097047 A JP 2009-320871 A JP 2012-149028 A JP-A-10-029917 JP-A-2001-072553 JP 2010-172134 A JP-A-2002-128644 JP 2013-40153 A

  The present invention provides hair having excellent firmness and stiffness, without giving it a feeling of stickiness and stickiness after hair styling, imparting smooth finger passing and luster, despite imparting excellent firmness and firmness to the hair. An object of the present invention is to provide a hair composition for improving quality.

  The present inventors have set forth the optimum conditions as one of the causes that have not been able to solve the problem yet, despite the fact that the development has been studied for a long time, because the objective evaluation method used during the development study is not appropriate. We newly found that we could not find. Specifically, conventionally, in the analysis of the objective evaluation results on the firmness and stiffness of samples obtained in application to hair bundles and in actual use, most of the results except for measured values of all samples or some sampled measured values The measured values were analyzed by various processes. However, the inventors have noticed that the analysis results obtained by this method have an insufficient correlation with the sensory evaluation of hair firmness and stiffness, and furthermore, all the sample measurement values obtained above were measured. The values are sorted in the order of the numerical values, and if the number representing the degree of firmness and stiffness is, for example, larger, the stronger stiffness or stiffness is present, the higher (specifically, for example, about 10% By using only the measured values (up to the upper 15%), it is possible to obtain a sufficient correlation that has not been obtained so far between the obtained analysis result and the sensory evaluation of the firmness and firmness of hair. I found it. By developing this evaluation or analysis method, it is easy to objectively evaluate a large number of samples relative to each other, and as a result of intensive studies in view of such circumstances, a composition containing a zinc compound is spray-coated together with negative ions. The present inventors have found that excellent effects of improving hair firmness and stiffness can be obtained, and have completed the present invention.

That is, the present invention particularly provides the following inventions.
Item 1.
A negatively charged charged hair composition containing one or more zinc compounds selected from the group consisting of zinc acetate, zinc gluconate, zinc chloride, zinc lactate, and zinc pyrrolidonecarboxylate.
Item 2.
Item 2. The charged hair composition according to item 1, wherein the content of the zinc compound is 0.1 to 5% by mass.
Item 3.
Item 4. The charged hair composition according to any one of Items 1 to 3, which is a liquid composition containing water.
Item 4.
A hair composition for a spraying device equipped with a negative ion generator, comprising at least one zinc compound selected from the group consisting of zinc acetate, zinc gluconate, zinc chloride, zinc lactate, and zinc pyrrolidonecarboxylate.
Item 5.
A hair composition containing at least one zinc compound selected from the group consisting of zinc acetate, zinc gluconate, zinc chloride, zinc lactate, and zinc pyrrolidone carboxylate is applied to the hair using a spraying device equipped with a negative ion generator. A method for improving hair quality, comprising applying.

The present invention also provides the following inventions.
Item 6. Use of the charged hair composition according to any one of Items 1 to 3 for improving hair quality.
Item 7. Use of the hair composition according to item 4 for improving hair quality.
Item 8. Negatively charging a hair composition containing one or more zinc compounds selected from the group consisting of zinc acetate, zinc gluconate, zinc chloride, zinc lactate, and zinc pyrrolidone carboxylate; and A method for improving hair quality, comprising spraying on hair.

  The present invention is particularly useful when used during styling to improve the hair composition for imparting an excellent firmness and firmness of the hair, and even though it provides an excellent firmness and firmness for the hair. The present invention makes it possible to provide a hair composition for improving hair quality, which is free from a feeling of stickiness and stickiness after use, gives smooth fingering and luster, and has good stability over time.

The term "hair composition" as used herein may mean a composition intended to be applied to the hair.
As used herein, the term "hair composition" may mean a hair composition.

Charged Hair Composition The charged hair composition of the present invention contains a zinc compound.
The zinc compound used in the present invention is at least one selected from the group consisting of zinc acetate, zinc gluconate, zinc chloride, zinc lactate, and zinc PCA. These compounds can be used alone or in combination of two or more. Among them, zinc gluconate, zinc chloride and zinc lactate are preferred because of the high effect of the present invention. The zinc compound can be in the composition of the present invention in the form of, for example, a salt, an ion, or a solvate, or a combination thereof. The amount of these zinc compounds is from 0.1 to 5% by mass, preferably from 0.3 to 4% by mass, more preferably from 0.5 to 3% by mass, most preferably from 0.5 to 5% by mass, based on the total amount of the hair composition. ２2% by weight.

The charged hair composition of the present invention is a negatively charged hair composition.
The charged hair composition of the present invention may be, for example, negatively charged when applied to hair as a hair composition, and need not always be negatively charged.
That is, the charged hair composition of the present invention can preferably be a composition that is negatively charged when applied to the hair.
One aspect of the charged hair composition of the present invention is a hair composition containing a zinc compound, which is intended to be negatively charged when applied to hair. it can. An example of this is a composition comprising a package or instructions that can be read for use when charged.
Further, one aspect of the charged hair composition of the present invention may be a hair composition containing a zinc compound, which is negatively charged on condition that the hair composition is applied to hair. An example of this is a composition that is negatively charged for testing as applied to the hair.

The charged amount per unit time of the charged hair composition of the present invention when applied per gram of hair (hereinafter, sometimes referred to as a specific charged amount) is preferably 0.01 μC / s. And more preferably 0.012 μC / s, and even more preferably 0.014 μC / s. By applying the charged hair composition of the present invention to hair with such a specific charge amount, hair quality can be suitably improved as described later. In addition, in this specification, the hair of "per 1 g of hair" is dry hair (that is, hair that is not wet) unless otherwise specified.
From the viewpoint of the effect of the present invention, the upper limit of the specific charge amount is not particularly limited, but from the viewpoint of preventing trouble due to static electricity generation, the specific charge amount is preferably 0.33 μC / s or less.
The specific charge amount is determined from the charge amount determined by the following measurement method using a Faraday gauge.
<Measurement method using Faraday gauge>
After insulating the outer conductor vessel and the inner conductor vessel, the zinc-containing composition is sprayed toward the inner conductor vessel from a sprayer equipped with a negative ion generator for a predetermined time (5 seconds). Attach it to the machine. The amount of electric power generated in the inner conductor device by the attached charged medicine is read by an electrostatic sensor, and the amount of charge is calculated from the resistance value (eigenvalue) of the device.

Negative charging of the hair composition can be suitably performed, for example, by atomizing the hair composition using a spraying device with a negative ion generator and attaching negative ions to the hair composition.
The “spraying device with a negative ion generator” referred to in the specification of the present application is a known technique, and an example thereof is described in, for example, JP-A-2009-297087. The apparatus includes at least a storage unit for a liquid composition, a device for spraying the composition in a mist, and a device for generating negative ions.

  As a method of spraying the composition in the form of a mist, for example, a gas that does not liquefy even when compressed is present in a pressurized state together with the composition, a method of atomizing the liquid by using an aerosol mechanism, a method in which the liquid is heated with a heater A method in which the vapor generated by heating is sprayed from a nozzle to form a mist, a method in which the liquid is changed into a mist using an ultrasonic generator and sprayed, and a method in which the liquid is mist using a pressurized gas A method of spraying using a mist nozzle of a Venturi type is exemplified. Above all, the method of atomizing the liquid using a pressurized gas is easy as the method for applying to the hair composition of the present invention because the device can be easily miniaturized and a small amount of spray can be used. This is the most preferred method. Examples of the method for generating the pressurized gas include a method using a cylinder of a liquefied gas or a compressed gas, and a method using a compressed gas generated by sending a gas to a compression unit such as a tank using an air pump. As a particularly preferable example of the spraying device used in such a method, a spraying device described in International Publication WO 03/034002 is exemplified.

  “Negative ion” as used herein means “negatively charged particles in a gas”. For example, when electrons are emitted into the air using electrical means, the emitted electrons form negative ions by attaching or bonding to gas molecules and water molecules, and immediately thereafter form negative ions with surrounding gas molecules and water molecules. It is known that the binding forms a “molecular mass of negative ions”. “Negatively charged particles in a gas” mainly means the “molecular mass of negative ions”. In the present invention, a “negative ion molecular group” to which several to several tens of water molecules are bound is preferably used.

  The method of generating negative ions is not particularly limited, but for example, a Leonard method, a corona discharge method, an electron emission method, a creeping discharge method, a piezoelectric transformer method, a method using plasma, and the like can be used. A corona discharge method, an electron emission method, and a piezoelectric transformer method are preferable, and a corona discharge method is most preferable. Specifically, for example, in a device including a corona discharge unit including a discharge needle and a semi-cylindrical counter plate, a discharge is performed by applying a high voltage between the discharge needle and the counter plate, In a method of generating ions, in a device consisting of a central electrode, a cylindrical counter electrode surrounding it, and a dielectric part that insulates and blocks them, a high voltage is applied between both electrodes to discharge and generate negative ions. A method in which a flat electrode is arranged on a side facing a plurality of needle-shaped electrodes, a method in which a high voltage is applied between the two electrodes to cause discharge to generate negative ions, and a high-voltage DC power supply unit is used. There is a method in which an intermittent high voltage is generated and applied to a needle-like electrode to discharge to generate negative ions. Negative ion generators may cause flammable gas to ignite.If a mechanism that has a flammable gas ignition factor is used in the negative ion generator, use an aerosol mechanism that uses flammable liquefied gas. The use of a method for atomizing liquids must be avoided.

  The attachment of the "negative ion" to the hair composition is preferably performed immediately after the hair composition is atomized. Specifically, this is performed by providing a negative ion emission unit at a position close to the discharge unit of the atomization device. For example, a preferred example is a method in which negative ions generated by a negative ion generator are brought into contact with mist particles of the hair composition by utilizing an air current. In this case, the negative ions are adsorbed on the easily polarizable resin or metal and disappear, so the negative ion generator is arranged as close as possible to the negative ion emitting portion (emission port) so that the generated negative ions can be removed as much as possible. Immediately come into contact with the fog particles of the hair composition. Further, by linking the power supply of the spraying device and the power source of the negative ion generator, it is possible to easily generate mist particles of the hair composition to which the negative ions are attached. The amount of the negative ions that come into contact with the mist particles depends on the negative ion generating capability of the negative ion generator and the wind speed of the airflow.In the present invention, when the negative ions are generated, the negative ion is discharged from the discharge port of the negative ions. At a position about 2 cm away, a spray with a negative ion generator that satisfies the condition that there are preferably 600,000 or more, more preferably 1,000,000 or more, and even more preferably 2,000,000 or more negative ions per cubic cm. An apparatus can be used. The measurement of negative ions can be performed using a known ion measuring device. For example, air ion meter AIC-3000 (product name, Sato Shoji), air ion meter KEC-900 (product name, Alton), air ion counter NT-CA (product name, Andes Electric), air ion counter NKMH- 103 (product name, Hokuto Denshi Kogyo, etc.).

The hair composition to which the negative ions are attached using such a spraying apparatus with a negative ion generator can apply the above-described preferable specific charge amount to the hair.
The hair composition of the present invention can be applied to hair by spraying the hair composition of the present invention from the spray device provided with a negative ion generator.
The application of the hair composition of the present invention to hair is desirably performed by setting conditions so that the specific charge of the hair composition of the present invention becomes the preferable specific charge described above.
For example, when using a spraying device with a negative ion generating device having a lower negative ion generating capability, it is preferable to set the distance between the negative ion discharge port and the hair in the spraying device with the negative ion generating device shorter. Conversely, when using a spray device with a negative ion generator having a higher negative ion generation capability, it is possible to set a longer distance between the negative ion discharge port and the hair in the spray device with the negative ion generator. become. Specifically, the application of the hair composition of the present invention to the hair, when using a spraying device with a negative ion generator as described above, the discharge port of the negative ion and the hair in the spraying device with a negative ion generator, and the hair. It is desirable that the distance between them is preferably in the range of about 1 to 40 cm, more preferably in the range of about 3 to 30 cm, and even more preferably in the range of about 5 to 20 cm.

The average particle size of the droplets of the charged hair composition of the present invention, which is sprayed using a spraying device with a negative ion generator, is preferably in the range of 20 to 100 μm, more preferably in the range of 40 to 80 μm, and Even more preferably, it is in the range of about 50-60 μm. For example, the composition of the present invention having such an average particle diameter of droplets can be suitably obtained by using the above-described apparatus described in International Publication No. 2015/034002.
In the present specification, the “average particle size” is specifically the Sauter average particle size.

  The hair composition of the present invention can preferably contain hydrocarbons consisting of squalane, an α-olefin oligomer having a polymerization degree of 2 to 7, and isoparaffin having a polymerization degree of 3 to 10. When these hydrocarbons are used alone or in combination of two or more kinds, together with the above-mentioned metal compound, the hair may have a further firmness and firmness, and the excellent effects of the present invention may be obtained. These hydrocarbons can be used alone or in combination of two or more. As the isoparaffin having a polymerization degree of 3 to 10, for example, light liquid isoparaffin having a polymerization degree of 4 to 6 or liquid isoparaffin having a polymerization degree of 5 to 10 can be used. The content of the hydrocarbons may be 0.5 to 8% by mass, preferably 1 to 6% by mass, and most preferably 2 to 5% by mass based on the total amount of the hair composition. it can.

  Further, the hair composition of the present invention can preferably contain dimethylpolysiloxane. There is no particular limitation as long as it is dimethylpolysiloxane, but those having a trimethyl-type terminal are preferred. Depending on the degree of polymerization, there are various physical properties ranging from a low-viscosity liquid to a solid, but any of them can be used. These dimethylpolysiloxanes can be used alone or in combination of two or more. In particular, when a combination of a highly polymerized dimethylpolysiloxane having a degree of polymerization of about 700 to 9000 and a dimethylpolysiloxane oil having a kinematic viscosity at 25 ° C. of about 0.65 to 50 centistokes is used, a higher effect of the present invention can be obtained. preferable. When a highly polymerized dimethylpolysiloxane (A) having a degree of polymerization of 700 to 9000 and a dimethylpolysiloxane oil (B) having a kinematic viscosity at 25 ° C of 0.65 to 50 centistokes are used in combination, the highly polymerized dimethylpolysiloxane ( The mixing ratio (A: B) of A) and dimethylpolysiloxane oil (B) is preferably 8:92 to 40:60, more preferably 11:89 to 35:65, and 25:75 to 35: 65 is most preferred. In the case of dimethylpolysiloxane oil having a kinematic viscosity of 0.65 to 50 centistokes at 25 ° C., 2 to 50 centistokes is preferable, 5 to 30 centistokes is more preferable, and 10 to 20 centistokes is most preferable. The content of dimethylpolysiloxane can be, for example, 0.1 to 15% by mass, preferably 0.5 to 10% by mass, more preferably 1 to 7% by mass, based on the total amount of the hair composition. Most preferred is 4-7% by weight.

The hair composition of the present invention can be used without particular limitation as long as it can be used in the form of a mist. The hair composition of the present invention is preferably a liquid containing water (eg, a solution, a suspension, a dispersion, a mixture thereof). Part or all (preferably all) of the hair composition of the present invention suitably has the form of an aqueous solution containing water. Preferably, the viscosity of the composition is 50 mPa · s or less, for example, when utilizing a microemulsion gel formed using agar that can be easily ejected in a spray form by pressurization, the composition It does not depend on the viscosity value of the product. On the other hand, even if the viscosity of the composition is 50 mPa · s or less, a composition that imparts spinnability to the composition, for example, a composition containing a cellulosic thickener, causes the composition to have spinnability. If it has, it is not preferable because it becomes difficult to spray the composition in the form of a mist. Whether or not the composition has spinnability can be determined by placing the composition in a beaker, inserting a glass rod into the composition, and pulling it up. At room temperature (about 25 ° C.), when a string of 2 cm or more is seen from the liquid surface of the composition, it is determined that the composition has spinnability.
In the present specification, the viscosity is determined by the following method.
<Method of determining viscosity>
Use a Brookfield rotary viscometer.
The spindle selection is such that the readings fall in the range of 30-70.
Measurement temperature: 25 ° C
Measurement time: 60 seconds

  The hair composition of the present invention may contain, in addition to the compounds described below, components that can be generally used in hair cosmetics as long as the effects of the present invention are not impaired. For example, surfactants, fatliquors, hair protectants, humectants, polymers, UV absorbers, sequestering agents, solvents, pH regulators, vitamins, antioxidants, antioxidant aids, preservatives, Fragrance and the like. These can be used alone or in combination.

  Examples of the surfactant include an anionic surfactant, a cationic surfactant, an amphoteric surfactant, a lipophilic nonionic surfactant, and a hydrophilic nonionic surfactant. These can be used alone or in combination.

  Examples of the anionic surfactant include higher alkyl sulfates such as sodium lauryl sulfate and potassium lauryl sulfate; alkyl ether sulfates such as POE-lauryl sulfate triethanolamine and POE-sodium lauryl sulfate; sodium lauroyl sarcosine and the like. Higher fatty acid amide sulfonates such as N-acyl sarcosine acid, N-myristoyl-N-methyltaurine sodium, coconut oil fatty acid methyl tauride sodium, sodium lauryl methyl tauride, POE sodium oleyl ether phosphate, POE stearyl ether phosphate Phosphate salts such as sodium di-2-ethylhexyl sulfosuccinate, monolauroyl monoethanolamide polyoxyethylene sodium sulfosuccinate, lauryl polyp Sulfosuccinates such as sodium pyrene glycol sulfosuccinate; alkylbenzenesulfonates such as sodium linear dodecylbenzenesulfonate, triethanolamine linear dodecylbenzenesulfonate and dodecylbenzenesulfonate; monosodium N-lauroylglutamate, di-N-stearoylglutamate N-acyl glutamates such as sodium and monosodium N-myristoyl-L-glutamate; higher fatty acid ester sulfates such as hydrogenated coconut fatty acid sodium glycerin sulfate; POE-alkyl ether carboxylic acid; POE-alkyl allyl ether carboxylate Α-olefin sulfonates; higher fatty acid ester sulfonates; secondary alcohol sulfates; higher fatty acid alkylolamide sulfates Tellurium salt; sodium lauroyl monoethanolamide succinate; N-palmitoyl aspartate ditriethanolamine; and sodium caseinate.

  Examples of the cationic surfactant include a quaternary ammonium salt type cationic surfactant, poly (N, N′-dimethyl-3,5-methylenepiperidinium) chloride, an alkylisoquinolinium salt, and a dialkylmori. Honium salts, POE-alkylamines, alkylamine salts, polyamine fatty acid derivatives, amyl alcohol fatty acid derivatives, benzalkonium chloride, benzethonium chloride and the like. Among these, a quaternary ammonium salt type cationic surfactant is preferable in terms of improving the flexibility and touch (especially smoothness) of hair. Examples of the quaternary ammonium salt type cationic surfactant include stearyltrimethylammonium chloride, cetyltrimethylammonium chloride, behenyltrimethylammonium chloride, stearyltrimethylammonium bromide, distearyldimethylammonium chloride, laurylbenzyldimethylammonium chloride and the like. No. Of these, stearyltrimethylammonium chloride, cetyltrimethylammonium chloride and behenyltrimethylammonium chloride are preferred, and stearyltrimethylammonium chloride and cetyltrimethylammonium chloride are most preferred. The content of the cationic surfactant may be, for example, from 0.01 to 1.5% by mass, preferably from 0.07 to 1.0% by mass, and more preferably from 0 to 1.0% by mass, based on the total amount of the hair composition. 0.1 to 0.7% by weight, most preferably 0.2 to 0.5% by weight.

  Examples of the amphoteric surfactant include imidazoline amphoteric surfactants such as sodium 2-undecyl-N, N, N- (hydroxyethylcarboxymethyl) -2-imidazoline; 2-heptadecyl-N-carboxymethyl-N- Betaine-based surfactants such as hydroxyethylimidazolinium betaine, lauryl dimethylaminoacetate betaine, alkyl betaine, amido betaine, and sulfobetaine.

  Examples of the lipophilic nonionic surfactant include, for example, sorbitan monooleate, sorbitan monoisostearate, sorbitan monolaurate, sorbitan monopalmitate, sorbitan fatty acid esters such as sorbitan monostearate, glycerin monoerucate, sesquiolein Glycerin fatty acids such as glycerin acid and glyceryl monostearate; propylene glycol fatty acid esters such as propylene glycol monostearate; hydrogenated castor oil derivatives; and glycerin alkyl ether.

  Examples of the hydrophilic nonionic surfactant include POE sorbitan fatty acid esters such as POE-sorbitan monooleate and POE-sorbitan monostearate, POE sorbite such as POE-sorbitan monolaurate, POE-sorbitan monooleate, and the like. POE-glycerin fatty acid esters such as fatty acid esters, POE-glycerin monostearate, POE-glycerin monoisostearate, POE-glycerin triisostearate, POE- such as POE-monooleate, POE-distearate, and POE-monodioleate. POE-alkyl ethers such as fatty acid esters, POE-lauryl ether, POE-oleyl ether, POE-stearyl ether, POE-behenyl ether, POE-octylphenyi POE alkyl phenyl ethers such as ether, POE-nonylphenyl ether, POE-dinonylphenyl ether, pluronics such as bruronic, POE.POP cetyl ether, POE.POP-2-decyltetradecyl ether, POE.POP- POE.POP-alkyl ethers such as monobutyl ether, POE.POP-hydrogenated lanolin, tetra-POE.tetra-POP-ethylenediamine condensates such as tetronic, POE-castor oil, POE-hardened castor oil, POE-hardened castor POE-castor oil-hardened castor oil derivatives such as oil monoisostearate, POE-beeswallow lanolin derivatives such as POE-sorbitol beeswax, coconut oil fatty acid diethanolamide, lauric acid monoethanolamide, fatty acid isopropane Alkanolamides such Ruamido, POE- propylene glycol fatty acid esters, POE- alkylamine, POE- fatty acid amides, sucrose fatty acid esters, POE- nonylphenyl formaldehyde condensate, such as alkyl ethoxy dimethylamine oxide.

  Examples of fatliquors include oils and fats, waxes, hydrocarbons, higher fatty acids, higher alcohols, and synthetic ester oils. These can be used alone or in combination.

  The fats and oils include avocado oil, camellia oil, almond oil, macadamia nut oil, corn oil, grape seed oil, medofoam oil, olive oil, rapeseed oil, egg yolk oil, sesame oil, wheat germ oil, sasanqua oil, castor oil, safflower Oil, cottonseed oil, soybean oil, peanut oil, teaseed oil, kaya oil, rice bran oil, jojoba oil, germ oil, cocoa butter, coconut oil, horse fat, hardened coconut oil, palm oil, tallow, sheep fat, hardened tallow, Palm kernel oil, lard, molle kernel oil, hydrogenated castor oil and the like. These can be used alone or in combination.

  Examples of the waxes include beeswax, candelilla wax, cotton wax, carnauba wax, mocrow, bayberry wax, ibota wax, whale wax, montan wax, nukarou, lanolin, kapok wax, lanolin acetate, liquid lanolin, sugar cane wax, reduced lanolin, jojoba wax, hard lanolin, shellac wax. , POE lanolin alcohol ether and the like.

  Examples of the hydrocarbon include liquid paraffin, ozokerite, squalene, paraffin, ceresin, vaseline, and microcrystalline wax. These can be used alone or in combination.

  As higher fatty acids, for example, lauric acid, myristic acid, palmitic acid, stearic acid, behenic (behenic) acid, oleic acid, 12-hydroxystearic acid, undecylenic acid, tallic acid, isostearic acid, linoleic acid, linoleic acid, Examples include icosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). These can be used alone or in combination.

  As higher alcohols, for example, linear alcohols such as lauryl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, myristyl alcohol, oleyl alcohol, and cetostearyl alcohol, monostearyl glycerin ether (bacyl alcohol), 2-decyltetradecinol, lanolin Alcohol, cholesterol, phytosterol, hexyldecanol, isostearyl alcohol, branched-chain alcohols such as octyldodecanol and the like can be mentioned. These can be used alone or in combination.

  Synthetic ester oils include isopropyl myristate, cetyl octoate, octyl dodecyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, decyl oleate, hexyl decyl dimethyloctanoate, cetyl lactate, myristyl lactate Lanolin acetate, isocetyl stearate, isocetyl isostearate, ethylene glycol di-2-ethylhexylate, fatty acid ester of dipentaerythritol, N-alkyl glycol monoisostearate, neopentyl glycol dicaprate, diisostearyl malate, di-2 Glycerin heptylundecanoate, trimethylolpropane tri-2-ethylhexylate, trimethylolpropane triisostearate, tetra-2 Pentane erythritol ethylhexylate, glycerin tri-2-ethylhexylate, trimethylolpropane triisostearate, cetyl 2-ethylhexanoate, 2-ethylhexyl palmitate, glycerin trimyristate, glyceride tri-2-heptylundecanoate, castor oil Fatty acid methyl ester, oleic acid oil, cetostearyl alcohol, acetoglyceride, 2-heptylundecyl palmitate, diisobutyl adipate, N-lauroyl-L-glutamic acid-2-octyldodecyl ester, di-2-heptylundecyl adipate , Ethyl laurate, di-2-ethylhexyl sebacate, 2-hexyldecyl myristate, 2-hexyldecyl palmitate, 2-hexyldecyl adipate, seba Phosphate diisopropyl, 2-ethylhexyl succinate, trioctanoate glycerin triisopalmitate glycerin, lanolin fatty acid isopropyl, hexyl laurate. These can be used alone or in combination.

  Examples of the hair protective agent include silicones other than dimethylpolysiloxane, such as chain-like polysiloxanes such as methylphenylpolysiloxane and methylhydrogenpolysiloxane, decamethylpolysiloxane, dodecamethylpolysiloxane, and tetramethyltetrahydro. Examples thereof include cyclic polysiloxanes such as genpolysiloxane, and silicone resins. These can be used alone or in combination.

  Examples of the humectant include polyethylene glycol, propylene glycol, glycerin, 1,3-butylene glycol, sorbitol, maltitol, maltotriose, mannitol, sucrose, erythritol, glucose, fructose, starch-degrading sugar, maltose, xylitol, Sugar alcohols such as starch-decomposed sugar-reducing alcohol, amino acids, chondroitin sulfate, hyaluronic acid, mucoitin sulfate, collagen derivatives, cholesteryl-12-hydroxystearate, sodium lactate, bile salts, seawater (including dried matter), marine Deep water (including dried product), chitosan derivatives, sodium pyrrolidonecarboxylate, and diglycerin / ethylene oxide / propylene oxide adducts. These can be used alone or in combination.

  Examples of the polymers include natural water-soluble polymers, semi-synthetic water-soluble polymers, synthetic water-soluble polymers, and inorganic water-based polymers. These can be used alone or in combination. However, some of the polymers, alone or in combination with other components, may impart spinnability to the composition. It is desirable to select the amount appropriately.

  Examples of natural water-soluble polymers include, for example, arabia gum, tragacanth gum, galactan, guar gum, carob gum, karaya gum, carrageenan, pectin, agar, quince seed (quince), alge colloid (cassow extract), starch (rice, corn, potato, wheat) ), Etc .; microbial polymers such as dextran, succinoglucan and pullulan; and animal polymers such as casein, albumin and gelatin.

  Examples of the semi-synthetic water-soluble polymer include starch-based polymers such as carboxymethyl starch and methylhydroxypropyl starch; methyl cellulose, ethyl cellulose, methyl hydroxypropyl cellulose, hydroxyethyl cellulose, cellulose sodium sulfate, hydroxypropyl cellulose, and sodium carboxymethyl cellulose. (CMC), crystalline cellulose, cellulose powder and other cellulose-based polymers; alginic acid-based polymers such as sodium alginate and propylene glycol alginate.

  Examples of the synthetic water-soluble polymer include vinyl polymers such as polyvinyl alcohol, polyvinyl methyl ether, polyvinyl pyrrolidone, and carboxyvinyl polymer; and polyoxyethylene polymers such as polyethylene glycol 20,000, 40,000, and 60,000. Polymers; copolymer polymers such as polyoxyethylene polyoxypropylene copolymer; acrylic polymers such as sodium polyacrylate, polyethyl acrylate and polyacrylamide; polyethylene imine; cationized polymers.

  Examples of the inorganic water-based polymer include bentonite, aluminum magnesium silicate (Vegum), laponite, hectorite, and silicic anhydride.

  Examples of the ultraviolet absorber include paraaminobenzoic acid, ethyl paraaminobenzoate, glyceryl paraaminobenzoate, amyl paradimethylaminobenzoate, octyl paradimethylaminobenzoate, and 4- [N, N-di (2-hydroxypropyl). Amino] benzoic acid ultraviolet absorbers such as ethyl benzoate; anthranilic acid ultraviolet absorbers such as homomenthyl-N-acetylanthranilate; ethylene glycol salicylate, phenyl salicylate, octyl salicylate, benzyl salicylate, p-tert-butyl salicylate Phenyl, salicylic acid-based ultraviolet absorbers such as homomenthyl salicylate; benzyl cinnamate, 2-ethoxyethyl paramethoxycinnamate, octyl paramethoxycinnamate, glyceryl mono-2-ethylhexanoate diparamethoxycinnamate; Cinnamic acid ultraviolet absorbers such as isopropyl lamethoxycinnamate / diisopropylcinnamate mixture; urocanic acid ultraviolet absorbers such as urocanic acid and ethyl urocanate; hydroxymethoxybenzophenone, hydroxymethoxybenzophenonesulfonic acid, sodium hydroxymethoxybenzophenonesulfonic acid Benzophenone ultraviolet absorbers such as dihydroxydimethoxybenzophenone, sodium dihydroxydimethoxybenzophenonedisulfonate, dihydroxybenzophenone and tetrahydroxybenzophenone; 4-tert-butyl-4'-methoxy-dibenzoylmethane, 2,4,6-trianilino-p -(Carbo-2'-ethylhexyl-1'-oxy) -1,3,5-triazine, 2- (2-hydroxy-5-methyl) Phenyl) benzotriazole. These can be used alone or in combination.

  Examples of the sequestering agent include alanine, trisodium ethylenediaminehydroxyethyltriacetate, disodium edetate, trisodium edetate, tetrasodium edetate, sodium citrate, sodium polyphosphate, sodium metaphosphate, gluconic acid, tartaric acid, Succinic acid, edetic acid, phytic acid and the like can be mentioned. These can be used alone or in combination.

  Examples of the solvent include water such as tap water, ion-exchanged water, and pure water; lower alcohols such as methanol, propanol, isopropanol, isobutyl alcohol and t-butyl alcohol; ethylene glycol, propylene glycol, trimethylene glycol, and 1,2. Dihydric alcohols such as butylene glycol and 1,3-butylene glycol; trihydric alcohols such as glycerin, trimethylolpropane and 1,2,6-hexanetriol; tetrahydric alcohols such as pentaerythritol; xylitol Pentahydric alcohols such as sorbitol and mannitol; diethylene glycol, dipropylene glycol, triethylene glycol, polypropylene glycol, tetraethylene glycol, diglycerin, polyethylene glycol Polyhydric alcohol polymers such as triglycerin, tetraglycerin and polyglycerin; dihydric alcohol alkyl ethers such as ethylene glycol monomethyl ether; dihydric alcohol alkyl ethers such as diethylene glycol monomethyl ether and diethylene glycol monoethyl ether; ethylene Dihydric alcohol ether esters such as glycol monomethyl ether acetate; and glycerin monoalkyl ethers such as xyl alcohol, seralkyl alcohol, and butyl alcohol. These can be used alone or in combination.

  Examples of the pH adjuster include citric acid, lactic acid, acetic acid, hydrochloric acid, potassium hydroxide, sodium hydroxide, sodium lactate, sodium citrate, sodium lactate, and the like. These can be used alone or in combination, and can be used not only for adjusting the pH value but also for the purpose of buffering the adjusted pH value.

  Examples of the vitamins include vitamins A, B1, B2, B6, and E and derivatives thereof, pantothenic acid and derivatives thereof, and the like.

Examples of the antioxidant include tocopherols, dibutylhydroxytoluene, butylhydroxyanisole, and gallic esters.
Examples of preservatives include organic acids such as benzoic acid, sodium benzoate, undecylenic acid, salicylic acid, sorbic acid, and paraoxybenzoate and derivatives thereof; phenols such as isopropylmethylphenol; phenoxyethanol; 1,2-hexanediol And 1,2-pentanediol.

  The amount of the charged hair composition of the present invention applied to hair is preferably 0.25 mg or more, more preferably 0.3 mg or more, and even more preferably 0.5 mg or more, per gram of hair, in terms of zinc. Can be. The upper limit of the application amount is not particularly limited, but may be, for example, 6 mg.

  The amount of the charged hair composition of the present invention applied to hair is preferably at least 0.0025 μC, more preferably at least 0.003 μC, and even more preferably at least 0.005 μC, per gram of hair. Can be. The upper limit of the application amount is not particularly limited, but may be, for example, 0.33 μC.

  The frequency of applying the charged hair composition of the present invention to hair is not particularly limited, but may be, for example, once or twice per day.

  The charged hair composition of the present invention is preferably applied for about 0.25 to 5 seconds, more preferably 0.3 to 3 seconds, and even more preferably 0.4 to 1 second, per gram of hair.

  The hair to which the charged hair composition of the present invention is applied may be wet or dry, but is preferably wet.

The charged hair composition of the present invention is suitably applied to hair with reduced tension and stiffness.
The charged hair composition of the present invention is suitably applied to hair having a zinc content of preferably 50 to 250 ppm (wt / wt), more preferably 50 to 200 ppm (wt / wt).

Hair Composition for Spraying Apparatus with Negative Ion Generator The “hair composition for spraying apparatus with a negative ion generating apparatus” of the present invention is used for a spraying apparatus with a negative ion generator, whereby the hair is negatively charged. It can be a hair composition that is sprayed on. Such a hair composition is understood with reference to the detailed description of the charged hair composition of the present invention described above.

Method for improving hair quality In the method for improving hair quality of the present invention, one or more zinc compounds selected from the group consisting of zinc acetate, zinc gluconate, zinc chloride, zinc lactate, and zinc pyrrolidone carboxylate have a minus sign. It can be negatively charged, sprayed, and applied to hair by a spray device with an ion generator.
The method for improving hair quality of the present invention can be understood with reference to the above-described detailed description of the charged hair composition of the present invention and the hair composition for a spraying apparatus with a negative ion generator of the present invention. You.

  Hereinafter, the present invention will be described specifically, but the present invention is not limited to the examples described below. In the following, “%” indicates “% by mass” and “ppm” indicates “ppm (wt / wt)” unless otherwise specified.

Test (I) [Sensory evaluation (1)]
(I-1) Evaluation of hair quality improving effects of various metal compounds was evaluated using virgin hair (Chinese adult hair, about 30 cm in length; manufactured by Beurax Co.) without chemical treatment history collected from the same person. A hair bundle having a total length of about 25 cm and a weight of about 3 g was prepared, washed with an aqueous solution of about 10% (wt / wt) sodium lauryl sulfate, rinsed well with running water, and then dried. did. The hair bundle in this state is hereinafter referred to as “untreated hair bundle”, and was used as a subject representing the original state of hair before damage or aging.
On the other hand, as a test subject showing the condition of the hair whose hair tension and stiffness has been reduced due to damage or aging, after immersing it in a dry "untreated hair bundle" for 15 minutes in a formic acid aqueous solution, rinsing it with running water, , And dried. The hair bundle subjected to the treatment is hereinafter referred to as “formic acid-treated hair bundle”.
In order to confirm the effect of the negative ion, the metal compound alone or both the metal compound and the negative ion were attached to the “formic acid-treated hair bundle” by the method described below, and evaluated by sensory evaluation. Specifically, the “formic acid-treated hair bundle” is immersed in ion-exchanged water for 10 minutes to allow the hair of the hair bundle to contain sufficient moisture, and then lightly sandwiched with a towel three times to remove excess water. did. Immediately after the treatment, a 1% (wt / wt) aqueous solution of each zinc compound is uniformly applied to the hair bundle using a spraying device equipped with a negative ion generator for generating negative ions of 2000 × 10 ⁴ / cm ³ or more. Approximately 1.8 g was applied (approximately 15 seconds), and a hair bundle was sandwiched 50 times with three fingers wearing rubber gloves, so that the applied subject was sufficiently applied to the hair. Of the 1.8 g application amount, the amount adhering to the hair (that is, actually applied to the hair) was about 0.5 g. The hair bundle after application was allowed to dry at room temperature for about 15 minutes while being hung with a thread, and then dried for 60 minutes using a dryer set at 55 ° C. The application of the test object was performed under two conditions of a generation condition and a non-generation condition of a negative ion, and the coexistence effect of the negative ion was evaluated by comparing the two. Furthermore, for the purpose of adjusting the evaluation points of the evaluation group, the untreated hair bundle and the formic acid-treated hair bundle were immersed in ion-exchanged water for 10 minutes so that the hair of the hair bundle contained sufficient moisture, and then three times with a towel. Excess water was removed by gently sandwiching and dried under the same conditions as described above for evaluation. As a reference, an aqueous solution having a zinc gluconate concentration of 2% (wt / wt) was also provided for evaluation. The evaluation was performed consistently from the pretreatment of the hair to the end of the evaluation so as to reduce the burden on the panel evaluator and perform a strict evaluation, and the subjects to be processed were limited to one or two metal compounds. There are 9 to 14 specialized panels to be evaluated, and the sensory evaluation was performed according to the evaluation criteria described below.
After the evaluation, the scores of each specialized panel were totaled, and the average value of the evaluation points was calculated for each subject. Next, the relative value of the evaluation point of the subject when the evaluation point of the “formic acid-treated hair bundle” was 0% and the evaluation point of the “untreated hair bundle” was 100% was calculated as an improvement rate. As will be appreciated, the "improvement rate" can be synonymous with the "recovery rate" to the same hair quality as the "untreated hair tress", and the "improvement rate" exceeds 100%. If this is the case, it can mean that the hair quality is improved compared to the “untreated hair bundle”. The evaluation and calculation results are shown in Tables 1 and 2.
In addition, in Table 1, the "evaluation series" indicates the sensory evaluation tests performed seven times by numbers in the order of execution. The evaluation date and time, number of evaluation panels, and evaluators are different in each evaluation series, so evaluation of untreated hair bundles and formic acid-treated hair bundles was performed in all evaluation series so that comparison between each evaluation result could be made. did.
“Ion” indicates a condition for generating a negative ion.
“PCA zinc” means “zinc pyrrolidonecarboxylate”.
The treatment for attaching the metal compound without the attachment of the negative ion (that is, the condition where no negative ion is generated) as described above may be referred to as “single treatment”.
The treatment for attaching both the metal compound and the negative ions as described above may be referred to as “ion addition treatment”. An example of the “negative ion addition treatment” includes a case without a metal compound.
Evaluation criteria for firmness and firmness 5 points Strong firmness and firmness 4 points Moderate firmness and firmness 3 points Some firmness and firmness 2 points Hardness and firmness 1 No feeling at all

  As shown in Table 2, under the condition of applying a 1% (wt / wt) aqueous solution of zinc lactate, zinc acetate, zinc chloride, zinc gluconate, and zinc pyrrolidonecarboxylate, when these are treated alone, Some of the hair had improved hair firmness and firmness, while others did not. On the other hand, in these negative ion addition treatment groups, the firmness and firmness of the hair were all improved. The difference in the improvement rate of hair firmness and firmness (ie, the degree of improvement by the addition of negative ions) of whether or not to add negative ions (that is, whether to perform the ion addition processing or the single processing) is about 60. From this, it can be seen that the addition rate of the negative ion is negative or positive in the single treatment (that is, even when the improvement in the single treatment is not observed). , Even if it is seen), it was found that the improvement rate was improved. On the other hand, it was 20% for zinc glycine, indicating that the presence or absence of the addition of a negative ion did not greatly affect the improvement of hair firmness and firmness.

(I-2) Evaluation of Influence on Hair Quality Improvement Effect by Difference in Compound Concentration As shown in Table 2, even when the zinc gluconate concentration was 1% (wt / wt) or 2% (wt / wt), negative ions were In the addition treatment group, the "effect of improving the firmness and firmness of hair" (that is, the effect of "restoring the firmness and firmness of weakened hair") and the effect of improving the improvement rate by adding negative ions were confirmed.

(I-3) Evaluation of the effect on the hair quality improvement effect due to the difference in the amount of negative ions added The effect on the hair quality improvement effect due to the difference in the amount of negative ions added when applied to hair according to the above-mentioned evaluation method. Was evaluated. Specifically, with a 1% (wt / wt) aqueous solution of zinc gluconate, a negative ion generator for generating about 600 × 10 ⁴ / cm ³ and about 1000 × 10 ⁴ / cm ³ negative ions is provided. The evaluation was performed using a spray device. Table 3 shows the evaluation results. In the examples, in order to avoid redundant description, for example, “adding negative ions by using a spraying device with a negative ion generator that generates negative ions of about 600 × 10 ⁴ / cm ³ ” means “adding negative ions”. It may be abbreviated as “addition amount 600”.

As shown in Table 3, the amount of the added negative ions affects the effect of improving the firmness and firmness of hair, and is at least about 600 × 10 ⁴ / cm ³ to about 1000 × 10 ⁴ / cm ³ . In the ion addition range, the greater the amount of the added negative ions, the higher the “effect of improving hair firmness and firmness” (that is, the effect of improving “reviving weakened hair firmness and firmness”). I understood. In this case, the degree of improvement in the ion addition process as compared with the single process was also higher as the amount of added negative ions was larger.

Test (II) [Sensory evaluation (2)]
The sensory evaluation (2) was performed in the same manner as the sensory evaluation (1).
In the sensory evaluation (2), in addition to the zinc compound, an evaluation result of no magnesium acetate and no metal compound (that is, only ion-exchanged water) was obtained.
In addition, in the sensory evaluation (2), in addition to the negative ion addition amounts of 600 and 1000, the evaluation result of the negative ion addition amount of 2000 was obtained.
The specialized panel to be evaluated was 9 to 15 persons.
The results are shown in Tables 4-1 to 4-3. Note that Tables 4-1 to 4-3 are separately described for ease of consideration, and some data are common, although only described for the sake of simplicity. Some of the data are obtained by diverting the data of the sensory evaluation (1) for comparison.

(II-1) Evaluation of Hair Improvement Effect of Various Zinc Compounds and Magnesium Acetate As shown in Table 4-1, similar to the results in the above-mentioned sensory evaluation (1), zinc lactate, zinc acetate, zinc chloride, gluconic acid Under the condition of applying a 1% (wt / wt) aqueous solution of zinc and zinc pyrrolidonecarboxylate, in the case of these single treatments, there are those which improve the firmness and firmness of the hair and those which do not. Was. On the other hand, in these negative ion addition treatment groups, the firmness and firmness of the hair were all improved. In addition, the difference in the improvement rate of hair firmness and firmness (that is, the degree of improvement by the addition of negative ions) is about 50 to 110 whether or not to add negative ions (that is, whether to perform the ion addition processing or the single processing). %, Which indicates that the negative ion addition is performed when the improvement rate is negative or positive (that is, even when the improvement by the single treatment is not observed, ), It was found that the improvement rate was improved.
On the other hand, in the case of zinc glycine, the degree of the improvement was 0%, and it was found that the presence or absence of the addition of a negative ion did not affect the improvement of the firmness and firmness of the hair.
On the other hand, with magnesium acetate, the degree of improvement was less than 0%, and it was found that the addition of negative ions did not improve the firmness and firmness of the hair.
On the other hand, when there was no metal compound (that is, only ion-exchanged water), the degree of improvement was less than 0%, and it was found that the addition of negative ions did not improve the firmness and firmness of hair.

(II-2) Evaluation of the Effect of Differences in Compound Concentration on Hair Quality Improvement Effect As shown in Table 4-2, the zinc gluconate concentration was 1% (wt / wt) as in the results of the sensory evaluation (1). In both cases (wt) and 2% (wt / wt), the effect of improving the firmness and firmness of the hair in the negative ion addition treatment group and the improvement rate improvement effect by the addition of negative ions were confirmed.

(II-3) Evaluation of influence on hair quality improvement effect due to difference in amount of added negative ion As shown in Table 4-3, the amount of added negative ion was consistent with the result of sensory evaluation (1). Has an effect on the effect of improving the firmness and firmness of the hair. At least in the range of addition of negative ions of about 600 × 10 ⁴ / cm ³ to about 2000 × 10 ⁴ / cm ³ , the amount of negative ions added It was found that the higher the content, the higher the "effect of improving hair stiffness and firmness" (i.e., the effect of "restoring the weakness and stiffness of weakened hair"). In this case, the degree of improvement in the ion addition process as compared with the single process was also higher as the amount of added negative ions was larger.

Test (III) [Objective evaluation (Bending rigidity evaluation)]
In the sensory test (2) described later, 200 hairs were randomly extracted from each of the treated hair bundles, and the bending elastic modulus was measured one by one. The measurement was performed using a single bending tester (KES-FB2-SH, manufactured by Kato Tech) at 25 ° C. and 50 RH%. The obtained measured values were arranged in descending order of the value, the average of the measured values of the top 10% was calculated, and the calculated value was used as the bending elasticity value of the hair. The “bending elasticity of the hair” is one of the main factors constituting the firmness and firmness of the hair, and its value correlates with the evaluation of the firmness and firmness of the hair by the sensory evaluation. Next, when the bending elasticity value of the hair of the “formic acid-treated hair bundle” is 0% and the bending elasticity value of the hair of the “untreated hair bundle” is 100%, the relative value of the bending elasticity value of the subject is improved. It was calculated as Finally, the difference between the improvement rate of the ion addition treatment and the improvement rate of the single treatment was calculated as the degree of improvement by the addition of negative ions. The results are shown in Tables 5-1 to 5-3. Note that Tables 5-1 to 5-3 are separately described for ease of consideration, and some data are common, although this is merely described as a precautionary measure.

(III-1) Evaluation of hair bending elasticity improving effect of various zinc compounds As shown in Table 5-1, 1% (wt.) Of zinc lactate, zinc acetate, zinc chloride, zinc gluconate, and zinc pyrrolidonecarboxylate. In the case of applying these aqueous solutions alone, the bending elasticity of the hair was improved (that is, the bending elasticity was increased), and the hair was not improved (that is, the bending). Elasticity did not increase). On the other hand, in each of these negative ion addition treatment groups, the bending elasticity of the hair was improved. The difference in the rate of improvement in flexural elasticity (ie, the degree of improvement in flexural elasticity due to the addition of negative ions) between whether or not to add negative ions (that is, whether ion addition processing or single processing) is about 70 to 210%. From this, the addition of negative ions is a case where the improvement rate is negative or positive (that is, even if no improvement is observed in the single treatment). However, it was found that the improvement rate was improved. On the other hand, with zinc glycine, the improvement was less than 0%, and it was found that the addition of negative ions did not improve the bending elasticity of the hair.

(III-2)
As shown in Table 5-2, it was confirmed that at least when the zinc gluconate concentration was in the range of 0.5% (wt / wt) to 2% (wt / wt), the bending elasticity was improved by the addition of negative ions. Was done.

As shown in Table 5-3, the amount of added negative ions affects the effect of improving the bending elasticity of the hair, and is at least about 600 × 10 ⁴ / cm ³ to about 2000 × 10 ⁴ / cm ³ . In the ion addition range, it was found that the larger the amount of the negative ion added, the higher the hair bending elasticity improvement rate in the ion addition treatment. Here, the degree of improvement in hair bending elasticity of the ion addition treatment as compared with the single treatment was also higher, and the larger the amount of added negative ions, the higher.

As shown in these test results, the effects confirmed by the sensory evaluation were also supported in the objective evaluation.

Test (IV) [Measurement of zinc content in hair holding]
Treatment with zinc chloride, zinc gluconate, zinc lactate, zinc acetate, or zinc PCA, and zinc glycine under the same conditions as in the above test (I) using a spray device equipped with a negative ion generator (ion addition treatment) ) And (b) hair treated (single treatment) using a sprayer without a negative ion generator, and these hair, and (c) "formic acid-treated hair", and (d) About each hair sample of "untreated hair", about 5 cm of the middle part of each hair was cut out, and the amount of zinc (ppm) contained in the hair was measured using an ICP mass spectrometer (manufactured by Agilent Technologies). The obtained results are shown as relative values (improvement rate) when the zinc content of (c) the “formic acid-treated hair tress” is 0% and the zinc content of the “untreated hair tress” is 100%. Calculated. Further, the difference between the amount of zinc (improvement rate) after the ion addition treatment and the amount of zinc (improvement rate) after the single treatment was calculated as the degree of improvement. The results are shown in Tables 6-1 to 6-3.

As shown in Tables 6-1 to 6-3, there was no correlation between the presence or absence or the degree of the addition of negative ions and the amount of hair-retaining zinc (and the degree of improvement thereof).
From this and comparison with each of the above tests, it was estimated that the effect of the present invention was not based on the mechanism of promoting the introduction of zinc into hair by the addition of negative ions.

Spraying Device with Negative Ion Generator (1) The spraying device with a negative ion generator used in each of the above examples was provided with the spraying device described in International Publication No. 2015/034002. The spraying device with the negative ion generator has at least 5 (viscosity of water) to 1560 c. p. If the viscosity is within the range, it was confirmed by a separate test that the average particle diameter of the discharged droplets was within the range of about 50 to 60 μm, regardless of the concentration of the liquid to be sprayed.
(2) In each of the above examples, the relationship between the amount of negative ions (addition amount of negative ions) added by each spraying device with a negative ion generator and the amount of charge per unit mass of the droplet actually discharged from the devices is described. The relationship is that the actual droplets are approximately 600 × 10 ⁴ droplets / cm ³ to approximately 2000 × 10 ⁴ droplets / cm ³ , which correspond to approximately 0.1 to 0.15 μC / g of the latter. It was confirmed by measuring with a gauge.
The measurement using the Faraday gauge was performed as follows.
<Measurement method using Faraday gauge>
After insulating the outer conductor vessel and the inner conductor vessel, the zinc-containing composition is sprayed toward the inner conductor vessel from a sprayer equipped with a negative ion generator for a predetermined time (5 seconds). Attached to the machine. The amount of electric power generated in the inner conductor device by the attached charged medicine was read by an electrostatic sensor, and the amount of charge was calculated from the resistance value (eigenvalue) of the device.
The viscosity here is a viscosity determined by the following method.
<Method of determining viscosity>
Use a Brookfield rotary viscometer.
The spindle selection is such that the readings fall in the range of 30-70.
Measurement temperature: 25 ° C
Measurement time: 60 seconds

Claims (5)

  A charged hair composition for improving hair quality during styling, which contains one or more zinc compounds selected from the group consisting of zinc acetate, zinc gluconate, zinc chloride, zinc lactate, and zinc pyrrolidone carboxylate, and is negatively charged. object.   The charged hair composition according to claim 1, wherein the content of the zinc compound is 0.1 to 5% by mass. The charged hair composition according to claim 1 or 2 , which is a liquid composition containing water.   For improving hair quality during styling, for a spraying device with a negative ion generator, which contains one or more zinc compounds selected from the group consisting of zinc acetate, zinc gluconate, zinc chloride, zinc lactate, and zinc pyrrolidonecarboxylate. Hair composition.   A hair composition containing at least one zinc compound selected from the group consisting of zinc acetate, zinc gluconate, zinc chloride, zinc lactate, and zinc pyrrolidone carboxylate is applied to the hair using a spraying device equipped with a negative ion generator. A method of improving hair quality during styling, including applying.