Hair cosmetics

Abstract

To achieve excellent equivalent discharge ability and remaining amount-reducing, in a double-structured type aerosol container in which a first agent and a second agent of a hair cosmetic composition are respectively filled in each pouch container.SOLUTION: Provided is a double-structured aerosol container, a first inner container and a second inner container being pouch containers formed by laminating a sheet material having a multi-layer structure including a resin layer, an inner layer of the pouch container being a polyolefin resin layer, a multi-layered sheet material satisfying the following conditions (1) to (3): (1) the sheet material having a thickness within the range of 35 to 240 μm; (2) the sheet material having a flexural rigidity within the range of 0.2 to 3.0 gf cm2 / cm; and (3) the sheet material having a hysteresis of 1.5 gf cm / cm or less.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an aerosol container, a hair cosmetic product, and a two-agent dispensing container; more specifically, it relates to a double-structure aerosol container in which the inner containers for filling the first agent and the second agent are each a pouch container, a hair cosmetic product in which the aerosol container is filled with the first agent and the second agent of an aerosol-type hair cosmetic composition, and a pump-type two-agent dispensing container which simultaneously pressurizes or sucks in and dispenses the first agent and the second agent filled in the pouch container. [Background technology]

[0002] In an aerosol type hair cosmetic composition that uses a propellant, such as an oxidation hair dye or hair bleach, the first agent containing an alkaline agent and the second agent containing an oxidizing agent are filled in separate inner containers in an aerosol container, and are discharged simultaneously when used. Typical aerosol containers used for two-agent type hair cosmetics include the "two-component can" type and the "double-structure container" type. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2002-240873 A [Patent Document 2] JP 2001-122364 A [Patent Document 3] JP 2013-220818 A [Patent Document 4] JP 2015-10087 A

[0004] Patent Document 1 discloses a double-can aerosol container. As shown in Figs. 1 to 3, a two-agent dispensing container 1 (aerosol container) includes a first container 11 and a second container 13, which are independent outer containers. The first container 11 contains an inner bag 16a in a pleated shape filled with a first agent, and the second container 13 contains an inner bag 16b in a similar pleated shape filled with a second agent. A propellant for pressurization is filled between the first container 11 and its inner bag 16a, and between the second container 13 and its inner bag 16b. Therefore, the internal pressure of the propellant can be set separately for the first container 11 and the second container 13. By pressing down the lever 33 of the two-agent dispensing container 1, the stems 18a and 18b, which are the dispensing valves of the first container 11 and the second container 13, are opened simultaneously, and the first agent and the second agent are discharged simultaneously.

[0005] Patent Document 2 discloses an aerosol container of a double-structure container type. In Figs. 3 to 6, a first inner container 64a and a second inner container 64b, each of which is pleated and filled with a first agent and a second agent, are housed in a single outer container 62, and a propellant for pressurization is filled in the space between the outer container 62 and the first and second inner containers 64a and 64b. When the stem 14 (discharge valve) is opened, the first agent and the second agent are discharged simultaneously. However, unlike the double can type, the pressurization (discharge pressure) for the first inner container 64a and the second inner container 64b is always the same.

[0006] When comparing the above-mentioned double-can type aerosol container with the double-structure container type, the former allows a difference in the amount of propellant and / or the internal pressure of the container between the first container 11 and the second container 13, which is advantageous for designing equal amounts to be discharged when the first and second agents have different viscosities, for example, or for adjusting the discharge ratio other than 1:1 when the first and second agents have similar viscosities. On the other hand, there is room for improvement in that the number of parts increases because two double-structure containers are required, and the two double-structure containers line up, resulting in a wide shape that makes the aerosol container somewhat difficult to grip. On the other hand, the latter double-structure container type has the advantage of being able to produce it at low cost because it has fewer components. In addition, because it has a single outer container, it also has the advantage of being more flexible in design, such as making it cylindrical for easier gripping.

[0007] Next, the inner bags 16a, 16b in the twin-can type aerosol container according to Patent Document 1, and the first inner container 64a and the second inner container 64b in the double-structure container type aerosol container according to Patent Document 2 are both molded into a cylindrical shape with pleats, and ultimately there is a large amount of remaining material that cannot be ejected. Even if the inner bag and inner container were cylindrical without pleats rather than pleated, the left and right sides of the inner container would become stretched as the content continues to be discharged, and the container would not collapse completely, so the problem of an increased amount of content remaining would not be fundamentally solved.

[0008] In recent years, as shown in FIG. 1 of Patent Document 3 and Patent Document 4, a double-structure container type aerosol container, in which a pouch container formed by bonding together the edge portions of elastically deformable sheet materials is used as an inner container for filling the first and second agents, has been attracting attention. As the sheet material constituting the pouch container, a multi-layered sheet material including a resin layer is often used. In addition, when filling the pouch container with the first and second agents of an oxidation hair dye or hair bleach, a polyolefin resin layer, an aluminum foil layer, a thermoplastic resin layer, etc. are incorporated into the multi-layered structure of the sheet material, taking into consideration that the filling contains an alkaline agent such as ammonia or an oxidizing agent such as hydrogen peroxide.

[0009] It is believed that when a pouch container made of such multi-layered sheet material is used, the sheets come together and collapse tightly as the first and second ingredients (the fillings) are continuously dispensed, thereby reducing the amount of remaining filling. Summary of the Invention [Problem to be solved by the invention]

[0010] Recently, however, there has been a demand for ensuring high levels of good dischargeability of the first and second agents in aerosol-type hair cosmetic compositions, such as oxidation hair dyes and hair bleaches, in double-walled aerosol containers that simultaneously discharge the first and second agents. Good dischargeability here means "equal amount dischargeability" and "reduced remaining amount."

[0011] "Equal amount dischargeability" refers to, for example, when the discharge ratio of the first agent:second agent of an oxidation hair dye or hair bleach is set to 1:1, the first agent and the second agent maintain a discharge ratio of 1:1 or close to that ratio during actual repeated intermittent discharge operations over time. However, in actual two-agent oxidation hair dyes and hair bleaches, the discharge ratio of the first agent:second agent may be set to 1.5:1 or 1:2, etc., and in such cases, it cannot be called "equal amount dischargeability" but should be called "fixed amount dischargeability", but the "equal amount dischargeability" referred to in this invention also includes such fixed amount dischargeability. If equal amount ejection is not maintained, the quantitative balance between the first and second agents ejected will be lost, making it difficult to perform successful oxidation hair dyeing or hair bleaching treatments.

[0012] As an example, the applicant of the present application has filed a patent application (Japanese Patent Application No. 2013-136475) for an invention for an aerosol-type hair cosmetic composition using a double-structure aerosol container, which has already been patented. In the specification of that application, as an evaluation criterion for equal amount ejection, which is the issue of the invention, the highest evaluation score of "5" was given to examples in which, when the ejection ratio of the first agent:second agent is set at 1:1, the ejection ratio of the first agent to the second agent at the time when half the amount of the second agent has been ejected is 0.8 to 1.2. However, recently, there has been a demand for a higher standard, such as giving the highest ranking evaluation point to examples in which the ratio of the discharge amount of the first agent to the time when half the amount of the second agent has been discharged is 0.9 to 1.1.

[0013] "Reducing remaining amount" refers to reducing the amount of the first and second agents that cannot be discharged from the aerosol container and remain in the inner container. Since the remaining amount of the first and / or second agents is wasted, there has been a high level of demand for reducing the remaining amount recently. Even if excellent equal amount ejection property is maintained, there may be cases where significant amounts of both the first and second agents remain in the inner container and cannot be ejected. Conversely, even if the remaining amounts of the first and second agents are zero, if the timing at which the remaining amounts become zero differs significantly between the first and second agents, this means that the equal amount ejection property is very poor.

[0014] Therefore, the technical problem to be solved by the present invention is to achieve excellent equal amount ejection and reduction in remaining amount in a double-structure type aerosol container in which the first and second agents of a hair cosmetic composition are filled in a pouch container formed by bonding together sheet materials with a multilayer structure each including a resin layer.

[0015] The inventors of the present application found it problematic that in the process of simultaneously ejecting the first and second agents of an oxidation hair dye from a pouch container intermittently over time using a double-structure aerosol container, the ejection amount ratio of the first and second agents may significantly deviate from the set ejection amount ratio, making it impossible to maintain a high level of equal ejection, or there may be a non-negligible amount remaining in the first and / or second agents. In addition, it was found that in such cases, one or both of the multi-layered sheet materials constituting the pouch container for the first and second agents may suffer from irregular wrinkle-like deformation, or the entire pouch container may suffer from a gentle curve.

[0016] It was believed that these deformations in the pouch container hinder the ejection stability of the first and second agents, i.e., excellent ejection of equal amounts of the first and second agents and reduction in remaining amounts. Furthermore, the inventors of the present application came to believe that the multilayered sheet material of the pouch container repeatedly undergoes small bending deformations under the high pressure of the propellant during the course of intermittent ejection operations over time, and that the hysteresis that occurs during this is the cause of the above-mentioned wrinkle-like deformations and the gradual curvature deformation of the entire pouch container. In this sense, the bending deformation (bending rigidity) of the multilayered sheet material and the hysteresis that occurs during this repeated bending deformation are the essential problems.

[0017] The above-mentioned issues regarding equal amount discharge and reduction in remaining amount are not limited to double-structure aerosol containers that use pouch containers, but can also be pointed out in the same way for two-component discharge containers in which the first and second components of an oxidative hair dye, hair bleach, or other hair cosmetic composition are filled into a pouch container and discharged simultaneously by a pump mechanism. [Means for solving the problem]

[0018] Based on the above considerations, the present invention was completed as a result of experimentally studying the relationship between the bending deformation (bending rigidity) and hysteresis of multilayered sheet materials, as well as the relationship between these parameters and the specific configuration of the multilayered sheet materials, namely, the thickness and the constituent materials of each layer.

[0019] (First Invention) The first invention of the present application for solving the above-mentioned problems provides a double-structure aerosol container, in which a first inner container for filling a first agent and a second inner container for filling a second agent of a hair cosmetic composition are housed in a single outer container, a space between the outer container and each inner container is used as a propellant filling space for filling a propellant, and the container is provided with a mechanism for simultaneously ejecting the first agent and the second agent, The aerosol container is a pouch container in which the first inner container and the second inner container are formed by bonding together a multilayered sheet material including a resin layer, the innermost layer of the pouch container is a polyolefin resin layer, and the sheet material satisfies the following conditions (1) to (3). (1) The thickness of the sheet material is within the range of 35 to 240 μm. (2) The bending rigidity of the sheet material is 0.2 to 3.0 gf cm 2 / cm. (3) The hysteresis of the sheet material is 1.5 gf cm / cm or less. In the first invention, the bending rigidity of the sheet material in (2) and the hysteresis of the sheet material in (3) are both measured at 25°C.

[0020] (Second Invention) In a second aspect of the present invention for solving the above problems, the sheet material in the aerosol container of the first aspect has a multi-layer structure including at least a gas barrier layer as an outer layer of a polyolefin resin layer which is the innermost layer.

[0021] In the second invention described above, the "multi-layer structure" of the sheet material refers to a layer structure of two or more layers, and preferably includes, for example, a three-layer structure, a four-layer structure, or a five-layer structure. The outer layer relative to the innermost layer includes a so-called intermediate layer or an outermost layer, and other layers may be interposed at each interface of the innermost layer / intermediate layer / outermost layer. The "gas barrier layer" is, as the name suggests, a material layer with gas barrier properties, and preferably includes, for example, an aluminum foil layer, an inorganic vapor deposition film layer, and a thermoplastic resin layer such as a PET layer or a PBT layer with high gas barrier properties, and among these, an aluminum foil layer and a PET layer are particularly preferably exemplified.

[0022] (Third Invention) The third invention of the present application for solving the above problems is a hair cosmetic product in which a first agent containing an alkaline agent and a second agent containing an oxidizing agent of an oxidative hair dye or hair bleach are filled in a first inner container and a second inner container of the aerosol container according to the first or second invention, respectively, Both the first and second agents are hair cosmetic products that contain a nonionic surfactant and a higher alcohol (a monohydric alcohol having 12 to 22 carbon atoms, which is linear or branched, saturated or unsaturated), and satisfy the mass content ratio of nonionic surfactant / higher alcohol = 0.07 to 1.80.

[0023] (Fourth Invention) In the fourth invention of the present application for solving the above problems, the total value of the higher alcohol index described below for at least one of the first and second agents in the hair cosmetic product of the third invention exceeds 140. Higher alcohol index: The product (a × b) of the number of carbon atoms of a higher alcohol (a) and the content (b) of the higher alcohol in the first or second agent in mass percent.

[0024] (Fifth Invention) In a fifth aspect of the present invention for solving the above problems, the higher alcohol contained in the first and second agents in the hair cosmetic product of the third aspect of the invention does not include a branched-chain higher alcohol.

[0025] (Sixth Invention) The sixth invention of the present application for solving the above problems provides a two-part dispensing container including a first container filled with a first part of a hair cosmetic composition and a second container filled with a second part, the two-part dispensing container further including a pump mechanism for simultaneously pressurizing or sucking and dispensing the first and second parts, The first container and the second container are pouch containers formed by bonding together sheet materials having a multilayer structure including a resin layer, the innermost layer of the pouch container is a polyolefin resin layer, and the sheet materials satisfy the following conditions (1) to (3), making it a two-component dispensing container. (1) The thickness of the sheet material is within the range of 35 to 240 μm. (2) The bending rigidity of the sheet material is 0.2 to 3.0 gf cm 2 / cm. (3) The hysteresis of the sheet material is 1.5 gf cm / cm or less. In the sixth invention, the term "pump mechanism" includes, without limitation, a mechanism that generates positive or negative pressure and uses that pressure to discharge a liquid (e.g., a first agent or a second agent of an oxidation hair dye or a hair bleach). Of course, there is no need to distinguish between a manual, mechanical, or electric type. For example, it also includes a pump mechanism that uses the positive or negative pressure generated when squeezing an elastically deformable outer container with fingers (repeatedly squeezing the container tightly and loosely) to discharge the first agent or the second agent in a pouch container contained inside the outer container.

[0026] In addition, the sixth invention can also be applied to the second invention, in which the sheet material has a gas barrier layer as an outer layer of the polyolefin resin layer; the third invention, in which the hair cosmetic product is filled with an oxidative hair dye or hair bleach and has a predetermined content ratio of nonionic surfactant / higher alcohol; the fourth invention, in which a predetermined total value of the higher alcohol index is specified for at least one of the first and second agents; and the fifth invention, in which the higher alcohol contained in the first and second agents does not contain a branched higher alcohol. Effect of the Invention

[0027] (Effects of the first invention) When the multi-layered sheet material of the pouch container which is the first inner container and the second inner container in the aerosol container according to the first invention satisfies the conditions (1) to (3) of the first invention, the pouch container does not deform like irregular wrinkles or the pouch container as a whole does not deform like a gentle curve in the repeated intermittent discharge operation of the first and second agents over time, and the set discharge amount ratio of the first agent to the second agent is maintained at a high level. Also, the remaining amount of the first agent and the second agent is further reduced.

[0028] If the thickness of the multilayered sheet material is too small and does not reach the range of (1) of the first invention, or if the thickness is too thick and exceeds the range of (1) of the first invention, the remaining amounts of the first and second agents will increase and the ability to eject equal amounts will decrease. If the bending rigidity of the multi-layered sheet material is insufficient and does not reach the range of (2) of the first invention, the pouch will collapse locally and the formulation flow path will be blocked. Conversely, if the bending rigidity is too great and exceeds the range of (2) of the first invention, the pouch will not be able to keep up with the reduction in formulation that accompanies ejection, resulting in ejection resistance, which will result in an increase in the remaining amount and a decrease in the ability to eject an equal amount. The lower the hysteresis of the multi-layered sheet material, the better. If it exceeds gf cm / cm, the pouch is prone to plastic deformation, and any wrinkles or deformations that occur are difficult to eliminate during the dispensing process, resulting in a decrease in the increase in remaining volume and in the ability to dispense evenly. Furthermore, if the innermost layer of the pouch container is not a polyolefin resin layer, for example, if the innermost layer of the first inner container filled with the first agent of an oxidative hair dye or hair bleach is a polyethylene terephthalate (PET) layer, this innermost layer may be significantly deteriorated by the alkaline agent, and the sealing suitability may be greatly reduced.

[0029] (Effects of the second invention) The specific content of the multi-layer structure of the sheet material constituting the pouch container is not limited, but it is preferable to use the multi-layer structure of the second invention, for example. The polyolefin resin (PO) layer such as a polyethylene (PE) layer or a polypropylene (PP) layer constituting the innermost layer of the multi-layer structure has the effect of preventing the penetration of the preparation into the intermediate layer and reducing the hysteresis of the sheet material. The aluminum (Al) foil layer constituting the intermediate layer of the multi-layer structure mainly gives a certain bending rigidity to the sheet material, and is also expected to prevent the transmission of oxygen gas derived from ammonia, which is the alkaline agent of the first agent, and the oxidizing agent of the second agent, to the outside of the pouch container, and further to prevent the transmission of ultraviolet rays into the pouch container. The thermoplastic resin layer such as a polyethylene terephthalate (PET) layer or a polybutylene terephthalate (PBT) layer or an inorganic vapor deposition film layer constituting the intermediate layer or outer layer of the multi-layer structure mainly can be expected to have the effect of imparting appropriate bending rigidity to the sheet material and can also be expected to have the effect of reducing hysteresis.

[0030] (Effects of the third invention) The first and second agents filled in the pouch container contain a nonionic surfactant and a higher alcohol, and when the mass-based content ratio of the nonionic surfactant to the higher alcohol is within the range of 0.07 to 1.80, it is expected that the amount of the first and second agents remaining in the pouch container when the aerosol container has been used up will be reduced, and the ability to eject equal amounts will be maintained.

[0031] (Effect of the fourth invention) A liquid composition containing a higher alcohol has a low surface tension and therefore good fluidity. Therefore, when at least one of the first and second agents contains a higher alcohol whose total higher alcohol index exceeds 140, the amount of the agent remaining in the pouch container can be reduced.

[0032] (Effect of the fifth aspect of the invention) When the higher alcohol contained in the first and second agents does not contain a branched higher alcohol, the amount of the first and second agents remaining in the pouch container when the aerosol container has been used up can be further reduced, thereby maintaining the ability to eject equal amounts.

[0033] (Effect of the sixth aspect of the invention) In the sixth invention, as in the first invention, the pouch container is not deformed in an irregular manner such as wrinkles or the entire pouch container is not deformed in a gentle curve when the first and second agents are intermittently discharged over time, and the set discharge rate ratio of the first and second agents is maintained at a high level. Also, the remaining amounts of the first and second agents are further reduced.

[0034] Furthermore, if the thickness of the multi-layered sheet material is too small or too large, if the bending rigidity of the multi-layered sheet material is insufficient or excessive, and further if the hysteresis of the multi-layered sheet material is excessive, then the two-component dispensing container of the sixth invention will suffer from the problems described in the "Effects of the first invention" section.

[0035] Furthermore, when the configurations of the second to fifth inventions are applied to the sixth invention, the effects described in the "Effects of the second invention" to "Effects of the fifth invention" columns, respectively, can be expected. [Brief description of the drawings]

[0036] [Figure 1] FIG. 1 is a front view showing an outline of an example of a double-structure container type aerosol container according to the first to fifth inventions of the present application, in which a first inner container and a second inner container, both of which are pouch containers, are housed within the same outer container. [Diagram 2] FIG. 13 is a front view showing the outline of an example of a dual-agent dispensing container according to a sixth invention of the present application. [Explanation of symbols]

[0037] Aerosol container 1 1st pouch 2 2nd pouch 3 Outer container 4 Valve Unit 5 Dispenser 6 Discharge path 7 2nd agent dispensing container 100 First containment vessel 110 1st pouch 111 Second Containment Container 120 2nd pouch 121 Sealing member 130 Communication hole 131 On-off valve 132 Hair dye dispenser 140 Insert 141 Pump 150 Discharge head 160 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0038] The present invention will be described below with reference to the preferred embodiment, but the technical scope of the present invention is not limited to these embodiments.

[0039] [First Invention Group: Aerosol Containers] (Double structure container) The aerosol container of the present invention is a double-structure container in which a first inner container for filling a first agent and a second inner container for filling a second agent, which are provided independently of each other, are housed in the same outer container, and a propellant is filled in the space between the outer container and each inner container. In addition, as will be described in detail later, the container is provided with a mechanism for simultaneously ejecting the first agent and the second agent. One specific example of the aerosol container will be described with reference to FIG.

[0040] The aerosol container 1 comprises a first inner container 2 for filling a first agent and a second inner container 3 for filling a second agent, which are provided independently and housed in a substantially cylindrical outer container 4. The spaces between the outer container 4 and each of the inner containers 2, 3 form propellant filling spaces in which propellants are filled.

[0041] The aerosol container 1 includes a valve unit 5. The valve unit 5 includes a first communication passage, which is a passage for the first agent filled in the first inner container 2, and a second communication passage, which is a passage for the second agent filled in the second inner container 3. In order to secure each of the communication passages, the first inner container 2 and the second inner container 3 may be provided with, for example, a rod-shaped joint material extending from the mouth of the inner container into the container. The valve unit 5 includes a valve stem that can move up and down to open and close the first communication passage and the second communication passage.

[0042] A dispenser 6 is connected to the valve unit 5, and each valve stem opens when the dispenser 6 is pressed down. A discharge passage 7 is provided in the dispenser 6 for discharging the first and second agents that have passed through each valve stem. The discharge passage 7 may be configured to discharge the first and second agents separately, or may be configured to allow the first and second agents to meet within the dispenser 6. Therefore, when the dispenser 6 is pushed down, the first agent filled in the first inner container 2 and the second agent filled in the second inner container 3 are simultaneously dispensed through the communication passage, the inside of the valve stem, and the discharge passage 7. Normally, the valve stem in the valve unit 5 is biased upward, and when the pushing down of the dispenser is stopped, the valve stem closes and discharge stops.

[0043] The inside of the outer container 4 of the aerosol container 1 is constantly pressurized by the propellant. When the dispenser 6 is pressed down, the inner containers 2 and 3 filled with the first and second agents are elastically deformed by the pressure of the propellant, and the filled materials can be dispensed. A separate device with an appropriate mechanism for mixing the first and second agents may also be provided and used. The outer container 4 is a robust pressure-resistant container made of PET, polyacrylate, nylon, polypropylene, aluminum, tinplate, etc. The outer container 4 in FIG. 1 is made of a light-transmitting material.

[0044] (Pouch containers and multi-layered sheet materials) The first inner container 2 and the second inner container 3 are both bag-shaped pouch containers formed by bonding together the edge portions of two sheets of a multi-layered structure including a resin layer. A pouch container can also be formed by folding back one sheet of the multi-layered structure and bonding together the edge portions of a pair of folded pieces. When the pouch container is not filled with a content or when the content has been completely expelled, it has a flat sheet-like shape. Even when a joint material is inserted into the inner container, the portions other than the joint material insertion portion have the same shape.

[0045] The multi-layered sheet material constituting the first inner container 2 and the second inner container 3 is preferably a multi-layered structure with an innermost PO layer and at least a gas barrier layer as its outer layer, and more preferably a multi-layered structure with an innermost PO layer, an Al foil layer as an intermediate layer, and a PET layer as an outer layer. In this case, it is preferable that the thickness of the PO inner layer is 20 to 200 μm, particularly 35 to 120 μm, the thickness of the Al foil intermediate layer is 5 to 15 μm, particularly 7 to 12 μm, and the thickness of the PET outer layer is 10 to 25 μm, particularly 10 to 20 μm. Therefore, it is preferable that the thickness of the entire multi-layered sheet material is 35 to 240 μm, particularly 50 to 200 μm. Representative examples of the PO layer include a PE layer or a PP layer, particularly a PE layer. Instead of the PET layer, a PBT layer, which is also a thermoplastic resin, can also be preferably used.

[0046] Next, the bending rigidity and hysteresis of the multi-layered sheet material are within a certain range. The bending rigidity value is 0.2 to 3.0 gf cm 2 / cm, and preferably 0.3 to 2.2 gf cm 2 / cm. The hysteresis value is preferably 1.5 gf cm / cm or less, and more preferably 1.2 gf cm / cm or less.

[0047] (Propellant) The propellant is filled in the outer container of the aerosol container having a double structure, outside the first and second inner containers which are the inner containers filled with the first and second agents. Examples of the propellant include liquefied gas and compressed gas, but compressed gas is preferable from the viewpoint of safety. Examples of the liquefied gas include LPG, DME, isopentane, etc., and examples of the compressed gas include nitrogen gas, carbon dioxide gas, and compressed air. The internal pressure of the propellant to be filled is not limited, but may be, for example, within the range of 0.2 to 1.0 MPa, and more preferably within the range of 0.4 to 0.8 MPa.

[0048] (Hair cosmetic composition) The hair cosmetic composition is a multiple-component type (at least two-component type), with the first component filled in the first inner container of an aerosol container and the second component filled in the second inner container of the aerosol container. As described below in "Second invention group: hair cosmetic products", typical examples of hair cosmetic compositions include a first component containing an alkaline agent and a second component containing an oxidizing agent, such as oxidative hair dyes and hair bleaches.

[0049] However, there is a technical advantage in using the aerosol container of the present invention as long as it is an aerosol-type hair cosmetic composition that simultaneously ejects the first agent and the second agent and controls the ejection rate ratio of the two. Therefore, the hair cosmetic composition in the first invention group is not limited to those that contain the first agent containing an alkaline agent and the second agent containing an oxidizing agent, and is not limited to oxidative hair dyes or hair bleaches.

[0050] [Second Invention Group: Hair Cosmetics] The hair cosmetic product of the present invention is an oxidative hair dye or hair bleach in which a first agent containing an alkaline agent and a second agent containing an oxidizing agent are filled in the first and second inner containers, respectively, of an aerosol container.

[0051] (aerosol container) The aerosol container for the hair cosmetic product is as described in the first invention group, including the first inner container and the second inner container which are pouch containers, and the multi-layered sheet material that constitutes them, and so description thereof will be omitted.

[0052] (Oxidative hair dye or hair bleach) The oxidative hair dye or hair bleach contains a first agent containing an alkaline agent and a second agent containing an oxidizing agent, and can be used in a conventional manner. It is preferably used on human hair. Usually, when used, the first agent and the second agent are discharged from an aerosol container, applied to the hair, and then washed off after treatment. The timing of mixing the first agent and the second agent can be appropriately selected. They may be mixed before application to the hair, or they may be applied to the hair and mixed at the same time using a comb or the like, or they may be mixed by attaching a mixing device to a double-structure container and then applied to the hair.

[0053] (First Agent) The first agent of the oxidative hair dye or hair bleach contains an alkaline agent, such as ammonia, alkanolamines (monoethanolamine, diethanolamine, triethanolamine, monoisopropanolamine, diisopropanolamine, triisopropanolamine, etc.), organic amines (2-amino-2-methyl-1-propanol, 2-amino-2-methyl-1,3-propanediol, guanidine, etc.), basic amino acids (arginine, lysine, etc.) and their salts, inorganic alkalis (sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, etc.), etc. The first agent may contain one or more types of alkaline agents. The content of the alkaline agent is preferably set so that the pH of the first agent falls within the range of 8 to 12.

[0054] (Oxidation dyes) In the oxidation hair dye, the first agent contains an oxidation dye. An oxidation dye is a compound that can develop color by oxidative polymerization. Examples of oxidation dyes include dye intermediates, couplers, and melanin precursors. The first agent may contain one or more types of oxidation dyes.

[0055] More specifically, examples of the oxidation dye include phenylenediamine and its derivatives, phenol derivatives, aminophenol and its derivatives, diphenylamine and its derivatives, pyridine derivatives, pyrimidine derivatives, pyrazole derivatives, pyrrolidine derivatives, toluene derivatives, indole derivatives, pyrrole derivatives, and imidazole derivatives.

[0056] More specifically, examples of dye intermediates include phenylenediamines (excluding metaphenylenediamine), aminophenols (excluding metaaminophenol, 2,4-diaminophenol, and paramethylaminophenol), toluylenediamines (excluding toluene-3,4-diamine and toluene-2,4-diamine), diphenylamines, diaminophenylamines, N-phenylphenylenediamines, and diaminopyridines (excluding 2,6-diaminopyridine).

[0057] Examples of the coupler include pyrogallol, resorcinol, catechol, meta-aminophenol, meta-phenylenediamine, 2,4-diaminophenol, 1,2,4-benzenetriol, toluene-3,4-diamine, toluene-2,4-diamine, hydroquinone, α-naphthol, 2,6-diaminopyridine, 1,5-dihydroxynaphthalene, 5-amino-orthocresol, para-methylaminophenol, 2,4-diaminophenoxyethanol, gallic acid, tannic acid, ethyl gallate, methyl gallate, propyl gallate, quinella gallanthus, and 5-(2-hydroxyethylamino)-2-methylphenol.

[0058] The first agent may contain a direct dye. The first agent itself may be colored to make it easier to distinguish it from the second agent. Examples of the direct dye include acid dyes, basic dyes, natural dyes, nitro dyes, disperse dyes, and HC dyes.

[0059] In addition to the above components, the first agent preferably contains a nonionic surfactant, a higher alcohol, and an oily component, which will be described later in the section "Nonionic surfactant, higher alcohol, and oily component." In addition, the first agent may contain water such as purified water, distilled water, or ion-exchanged water, water-soluble polymers, solvents, anionic surfactants, cationic surfactants, amphoteric surfactants, thickeners, amino acids, sugars, preservatives, chelating components, pH adjusting components, antioxidants such as anhydrous sodium sulfite, plant or herbal extracts, vitamins including ascorbic acids, fragrances, ceramides, UV absorbers, antistatic agents, hair softeners, penetration enhancers, and the like.

[0060] The first agent filled in the first inner container is preferably an emulsion. It is also preferable that the first agent is discharged from the aerosol container in a cream form. The viscosity of the cream-like first agent may be 5000 to 50000 mPa·s, more preferably 6000 to 30000 mPa·s. The viscosity is measured using a B-type viscometer under the following conditions: 25°C, 1 minute, rotation speed: 12 rpm, No. 3 rotor (when the viscosity is 5000 mPa·s or less), No. 4 rotor (when the viscosity is 5000 mPa·s or more). As the viscometer, for example, a VISCOMETER TV-10 viscometer may be used.

[0061] (Second agent) The second agent of the oxidation hair dye or hair bleach contains an oxidizing agent. The content of the oxidizing agent in the second agent is preferably 0.1 to 15 mass %, more preferably 1.0 to 9.0 mass %, and particularly preferably 2.0 to 6.0 mass %.

[0062] Examples of the oxidizing agent include hydrogen peroxide, urea peroxide, melamine peroxide, sodium percarbonate, potassium percarbonate, sodium perborate, potassium perborate, sodium peroxide, potassium peroxide, magnesium peroxide, barium peroxide, calcium peroxide, strontium peroxide, hydrogen peroxide adduct of sulfate, hydrogen peroxide adduct of phosphate, hydrogen peroxide adduct of pyrophosphate, etc. The oxidizing agent may contain one or more kinds. The pH of the second agent is preferably 2 to 6, more preferably 3 to 5.

[0063] The second agent preferably contains a nonionic surfactant, a higher alcohol, and an oily component. These will be described later in the section "Nonionic surfactant, higher alcohol, and oily component." The second agent may also contain water such as purified water, distilled water, or ion-exchanged water, water-soluble polymers, anionic surfactants, cationic surfactants, amphoteric surfactants, polyhydric alcohols, solvents, thickeners, amino acids, silicones, sugars, phenoxyethanol, hydroxyethanediphosphonic acid, tetrasodium hydroxyethanediphosphonate, or other hydrogen peroxide stabilizing components, chelating components, pH adjusting components, plant or herbal extracts, fragrances, and the like.

[0064] The second agent filled in the second inner container is preferably an emulsion. It is also preferable that the second agent is discharged from the aerosol container in a cream form. The viscosity of the cream-like second agent may be 5000 to 50000 mPa·s, and more preferably 6000 to 30000 mPa·s. The viscosity of the second agent is measured in the same manner as the viscosity of the first agent described above.

[0065] (Nonionic surfactant, higher alcohol, oily component) In the hair cosmetic product of the present invention group, the first and second agents of the oxidative hair dye or hair bleach each contain a nonionic surfactant and a higher alcohol.

[0066] When the mass-based content ratio "nonionic surfactant / higher alcohol" is within the range of 0.07 to 1.8, more preferably within the range of 0.1 to 1.6, and even more preferably within the range of 0.3 to 1.5, the remaining amounts of the first agent and the second agent in the pouch container can be reduced. Furthermore, when the content ratio is within the range of 0.13 to 0.60, the remaining amounts of the first and second parts in the pouch container can be reduced, and it is easy to maintain equal (fixed amount) ejection of the first and second parts.

[0067] In the first and second agents, the content of the nonionic surfactant can be 0.1 to 10 mass %, or may be 0.5 to 6 mass %, and the content of the higher alcohol can be 0.1 to 10 mass %, or may be 1 to 9 mass %. From the viewpoint of emulsion stability, the first and second agents preferably contain a nonionic surfactant having an HLB value of 10 or more, preferably an HLB value of 14 or more. Furthermore, in addition to the nonionic surfactant, it is more preferable that a nonionic surfactant having an HLB value of less than 10, preferably an HLB value of less than 8 is contained. It is considered that the effect of the present invention is easily exhibited when the emulsion is stable. The HLB value of the nonionic surfactant can be calculated by the known Griffin formula.

[0068] Examples of nonionic surfactants include polyoxyalkylene alkyl ethers, polyoxyalkylene fatty acid esters, alkyl polyglucosides, sugar esters, sugar amides, and alkyl polyglyceryl ethers, with polyoxyalkylene alkyl ethers being preferred, and polyoxyethylene (POE) alkyl ethers being more preferred. The number of carbon atoms in the alkyl moiety in the POE alkyl ether is preferably 14 to 22. Specific examples include POE cetyl ether, POE oleyl ether, POE stearyl ether, and POE behenyl ether.

[0069] In the present invention, the term "higher alcohol" refers to a monohydric alcohol having 12 to 22 carbon atoms, which is linear or branched, saturated or unsaturated. In the first and second agents, when the content ratio of higher alcohols having 14 to 18 carbon atoms in the total higher alcohols blended is 0.7 or more, the first and second agents can be well maintained in terms of equal (fixed amount) discharge over time.

[0070] From the viewpoint of improving brightness, it is preferable that the first and second agents contain an oily component that is solid at 25° C., excluding higher alcohols. In particular, it is preferable that the oily component contains at least one selected from the group consisting of hydrocarbons and esters of monovalent fatty acids and monovalent higher alcohols. Examples of oily components that are solid at 25° C. include hydrocarbons such as microcrystalline wax, waxes such as lanolin, beeswax, candelilla wax, higher fatty acids such as stearic acid, myristic acid, palmitic acid, behenic acid, and esters of monovalent fatty acids and monovalent higher alcohols such as stearyl stearate, myristyl myristate, and cetyl palmitate. In the present application, silicones are not included in the oily components that are solid at 25° C.

[0071] From the viewpoint of improving brightness, the content of oily components that are solid at 25° C., excluding higher alcohols, in the first and second agents is preferably 0.01 to 8% by mass, and more preferably 0.5 to 5% by mass. If the content of oily components that are solid at 25° C., excluding higher alcohols, exceeds the above range, the slippage with the pouch container may decrease, resulting in poor dischargeability.

[0072] [Third invention group: Two-component dispensing container] The two-agent dispensing container of the present invention group comprises a first container filled with the first agent of a hair cosmetic composition and a second container filled with the second agent, and a pump mechanism for simultaneously pressurizing or sucking and dispensing the first and second agents. As the hair cosmetic composition, an oxidative hair dye or a hair bleaching / decoloring agent, which dispenses the first and second agents at a constant ratio when used, is preferable. However, the hair cosmetic composition is not limited to those requiring equal amounts of the first and second agents, and is applicable to any hair cosmetic composition requiring at least a reduction in the remaining amount of the first and second agents.

[0073] (2nd agent dispensing container) A specific example of a two-agent dispensing container will be described below. This two-agent dispensing container has the same configuration as the hair dye dispensing container disclosed in the figures of JP 2010-35585 A, a known patent document, and the hair dye dispensing container shown in Figure 1 of said publication is shown in Figure 2 as a specific example of a two-agent dispensing container of the present invention, and an overview of its configuration will be described below. Points not described in detail below are as disclosed in JP 2010-35585 A.

[0074] That is, the two-agent dispensing container 100 includes a first storage container 110 which is a filling section for the first agent of the two-agent mixed hair dye, a second storage container 120 which is a filling section for the second agent, and a hair dye dispensing tool 140 which is connected to each of the first and second storage containers 110, 120. The first agent of the hair dye is filled in a first pouch 111 which constitutes the first storage container 110, and the second agent is filled in a second pouch 121 which constitutes the second storage container 120.

[0075] The openings of these first and second pouches 111, 121 are sealed with sealing members 130, and communication holes 131 that connect the inside and outside of the pouches 111, 121 are provided in these sealing members 130, and opening / closing valves 132 are formed in the communication holes 131. When a pair of insertion members 141 provided in the hair dye dispenser 140 are inserted into the pair of communication holes 131, the pair of opening / closing valves 132 change from a closed state to an open state, and the first and second agents filled in the pouches 111, 121 flow into the internal flow paths and are simultaneously dispensed from the dispenser head 160. In addition, the pair of pumps 150 are equipped with check valves of a predetermined structure, and when the ejection head 160 is pressed down against a spring (not shown) in the pump 150, the opening / closing valve 132 opens and the first agent and the second agent are ejected from the pouches 111, 121.

[0076] In addition to the above, the two-component dispensing container of the present invention may be any container equipped with a pump mechanism that simultaneously pressurizes or sucks in and discharges the first and second components of a hair cosmetic composition, provided that it was publicly known prior to the filing of this application.

[0077] (Pouch containers and multi-layered sheet materials) The embodiment of the pouch container and the multi-layered sheet material in the third invention group is similar to the embodiment of the pouch container and the multi-layered sheet material in the first invention group described above, and therefore will be omitted to avoid complication. EXAMPLES

[0078] Examples of the present invention are described below, but the technical scope of the present invention is not limited to these examples.

[0079] First, Tables 1 and 2 at the end of this document will be explained. The values ​​indicating the content of each component in these tables are expressed in mass% units in the first or second agent. For nonionic surfactants, the HLB value is also shown. In the component names of nonionic surfactants, the number in parentheses following "POE" indicates the number of moles of POE added.

[0080] The first and second agents of the oxidative hair dye compositions according to Examples 1-2 and Comparative Examples 1-3 shown in Table 1, and Examples 3-6 and Comparative Examples 4-5 shown in Table 2 were prepared by a conventional method. Each agent was a cream-like emulsion, and had a viscosity in the range of 5000 to 50000 mPa s.

[0081] [Explanation of Examples and Comparative Examples] In the following tests, for each Example and Comparative Example, the aerosol container shown in FIG. 1 was used, and the “pouch sheet material thickness (μm)”, “pouch sheet material layer structure”, and “pouch sheet material bending rigidity (gf cm 2 The first and second pouches were constructed using multi-layered sheet materials as shown in the "Pouch sheet material hysteresis (gf cm / cm)" and "Pouch sheet material hysteresis (gf cm / cm)" columns, and the first and second pouches were filled with the first and second agents of each Example and Comparative Example. Products (hair cosmetics) were manufactured so that the internal pressure of the double-structure container was 0.5 MPa, and the following remaining amount evaluation test and equal amount ejection evaluation test were performed. The bending stiffness and hysteresis of the pouch sheet material were measured at 25° C. using a 4 cm×4 cm test piece of the sheet material with a bending tester KES-FB2-S manufactured by Kato Tech Co., Ltd.

[0082] In addition, for example, a numerical notation such as "a / b / c" in the pouch sheet material thickness column indicates that the inner layer is aμm, the middle layer is bμm, and the outer layer is cμm, making it a multi-layered sheet with a total thickness of (a+b+c)μm, and for example, an notation such as "PE / Al foil / PET" in the pouch sheet material layer composition column indicates that the inner layer is a polyethylene layer, the middle layer is an aluminum foil layer, and the outer layer is a polyethylene terephthalate layer. In the pouch sheet material layer composition column, "IVD" means "inorganic vapor deposit film layer."

[0083] [Evaluation Tests of Examples and Comparative Examples] (Residual Amount Evaluation Test) The oxidative hair dye composition was discharged from the product until the contents could no longer be discharged (total discharge), and the weights of the first and second agents in the first and second pouches after the total amount was discharged were measured, and the remaining proportions in the first and second pouches were calculated using the following formula. Remaining amount ratio (%) = (weight after full amount is discharged) / (weight before discharge) x 100

[0084] The remaining amount evaluation test was performed in triplicate and the average value was calculated. The results were evaluated according to the following evaluation criteria and are shown in the "Remaining amount evaluation" column in the table. 7: Less than 1% remaining 6: Remaining amount is 1% or more but less than 1.5% 5: Remaining percentage is 1.5% or more but less than 2% 4: Remaining amount is 2% or more but less than 2.5% 3: Remaining amount is 2.5% or more but less than 3% 2: Remaining amount is 3% or more but less than 3.5% 1: Remaining percentage is 3.5% or more

[0085] (Equivalent discharge evaluation test) The product was stored at 25°C for one month after production, and then the discharge operation was continued until the remaining amount (mass) of the second part was half of the filled amount. Note that the products according to each Example and Comparative Example are set so that the first part and the second part are discharged in equal amounts in a 1:1 ratio.

[0086] The amount of the first agent discharged was measured when the remaining amount of the second agent was half of the filled amount (when half of the second agent had been discharged), and the ratio to the amount of the second agent discharged was calculated using the following formula. The closer this discharge amount ratio is to 1, the better the ability to discharge equal amounts of the first and second agents. Discharge volume ratio = (amount of the first agent discharged when half of the second agent has been discharged) / (half of the second agent)

[0087] The test for evaluating the uniform amount of discharge was carried out three times, and the average value was calculated. The results were evaluated according to the following evaluation criteria and are shown in the "Uniform amount of discharge" column in the table. 7: Discharge ratio is 0.9 or more and 1.1 or less 6: Discharge ratio is 0.85 or more and less than 0.9, or more than 1.1 and less than 1.15 5: Discharge ratio is 0.8 or more and less than 0.85, or more than 1.15 and less than 1.2 4: Discharge ratio is 0.7 or more and less than 0.8, or more than 1.2 and less than 1.3 3: Discharge ratio is 0.6 or more and less than 0.7, or more than 1.3 and less than 1.4 2: Discharge ratio is 0.5 or more and less than 0.6, or more than 1.4 and less than 1.5 1: Discharge ratio is less than 0.5 or more than 1.5

[0088] [Evaluation Results of Examples and Comparative Examples] First, looking at the overall picture, in all examples the first pouch and the second pouch corresponded to the first invention and the second invention, and therefore the remaining amount evaluation and equal amount discharge ability of the first pouch and the second pouch were both rated as rank "6" or higher. Comparing the Examples, the first agent in Example 3 does not fall under any of the third to fifth inventions and is therefore rated as a remaining amount of "6", whereas the second agent in Example 3 falls under all of the third to fifth inventions and is therefore rated as a remaining amount of "7". Thus, Example 3 is the only one of all Examples to be rated as a "6" for its ability to eject an equal amount.

[0089] In all of Comparative Examples 1 to 5, the first pouch and the second pouch do not correspond to the first invention, and therefore the remaining amount evaluation of the first agent and the second agent is ranked "5" or less, and the evaluation rank of the equal amount ejection ability is also ranked "5" or less.

[0090] Next, the individual Examples and Comparative Examples will be described in turn. In Example 1, the first and second pouches and the first and second agents all fall under all of the first to fifth inventions, and the first and second pouches are the same pouch containers using the same sheet material, and the layer structure of the sheet material is PE / Al foil / PET. Therefore, the remaining amount evaluation of the first and second agents, and the equal amount ejection property evaluation of the first and second agents are both "7".

[0091] In all of Comparative Examples 1 to 3, the compositions of the first and second agents are the same as in Example 1. However, in Comparative Examples 1 and 2, the layer configurations of the sheet materials constituting the first and second pouches are also the same as in Example 1, but the thickness of each layer is too large in Comparative Example 1 and too small in Comparative Example 2, so that the total thickness of each sheet material is outside the range of the sheet material thickness defined in the first invention.

[0092] In Comparative Example 3, the hysteresis of the first and second pouch sheet materials was large, exceeding the upper limit of 1.5 gf·cm / cm of the hysteresis defined in the first invention.

[0093] In Example 2, only the layer structure of the first pouch sheet material is different from Example 1, but the inner layer is a polyolefin resin layer, and the thickness of the pouch sheet material is almost the same as in Example 1. In addition, the bending stiffness value and hysteresis value are somewhat smaller than those of Example 1.

[0094] In Examples 3 to 6, the first and second pouch sheet materials both fall under the first and second inventions. The second agents in these Examples all fall under the third to fifth inventions, but the first agent in Example 3 does not fall under any of the third to fifth inventions. Therefore, the remaining amount evaluation and the evaluation rank of the equal amount ejection ability of the first agent are both ranked as "6". On the other hand, the first agent in Example 4 falls under the third invention, the first agent in Example 5 falls under the fourth invention, and the first agent in Example 6 falls under both the fourth and fifth inventions, so the remaining amount evaluation and the evaluation rank of the equal amount ejection ability of the first and second agents are both ranked as "7".

[0095] In Comparative Example 4, the compositions of the first and second agents fall under any of the third to fifth inventions, but neither the first nor the second pouch sheet materials fall under the first invention, and the content of microcrystalline wax, an oily component that is solid at 25°C, in the first agent is 9 mass%, which exceeds the preferred content range (paragraph 0071) from the viewpoint of the sliding between the first agent and the pouch container. In Comparative Example 5, neither the first nor the second pouch sheet materials fall under the first invention, and neither the first nor the second agent falls under any of the third to fifth inventions.

[0096] As can be seen from Comparative Example 5, when the first and second pouch sheet materials do not fall under the first invention and the first and second agents do not fall under all or most of the third to fifth inventions, the evaluation of the remaining amounts of the first and second agents and the evaluation rank of the equal amount ejection ability are very low.

[0097] [Table 1] TIFF0007610240000001.tif11492

[0098] [Table 2] TIFF0007610240000002.tif114102 [Industrial Applicability]

[0099] According to the present invention, it is possible to achieve better equal amount ejection and reduced remaining amount in a double-structure type aerosol container in which the first and second parts of a hair cosmetic composition are filled in a pouch container formed by bonding together multilayer sheet materials each containing a resin layer.

Claims

1. A first agent containing an alkaline agent in an oxidation hair dye or hair bleach, A second agent containing an oxidizing agent; a double-structure aerosol container in which a first inner container filled with the first agent and a second inner container filled with the second agent are housed in a single outer container, a space between the outer container and each inner container is a propellant filling space in which a propellant is filled, and the aerosol container is equipped with a mechanism for simultaneously ejecting the first agent and the second agent; A hair cosmetic product comprising: The first inner container and the second inner container are pouch containers formed by bonding together sheet materials having a multi-layer structure including a resin layer, the innermost layer of the pouch container is a polyolefin resin layer, and the sheet materials satisfy the following conditions (1) to (3): The sheet material has a laminated structure including the innermost layer which is a polyolefin resin layer having a thickness of 20 to 200 μm, an intermediate layer which is a thickness of 5 to 15 μm, and an outer layer which is a PET layer having a thickness of 10 to 25 μm; The first agent and the second agent each contain a nonionic surfactant and a higher alcohol (a monohydric alcohol having 12 to 22 carbon atoms, which is linear or branched, saturated or unsaturated), and satisfy the condition that the content ratio by mass of nonionic surfactant / higher alcohol is 0.07 to 1.

80. (1) The thickness of the sheet material is within the range of 35 to 240 μm. (2) The bending rigidity of the sheet material is 0.2 to 3.0 gf cm 2 / cm. (3) The hysteresis of the sheet material in the first inner container is 1.5 gf·cm / cm or less, and the hysteresis of the sheet material in the second inner container is 0.4 gf·cm / cm or less.

2. 2. The hair cosmetic product according to claim 1, wherein the sheet material has a multi-layer structure comprising at least a gas barrier layer as an outer layer of a polyolefin resin layer which is an innermost layer.

3. The hair cosmetic product according to claim 1 or 2, wherein the total value of the higher alcohol index of at least one of the first and second agents is greater than 140. Higher alcohol index: the product (a x b) of the number of carbon atoms of a higher alcohol (a) and the content (b) of the higher alcohol in the first or second agent in mass%.

4. 3. The hair cosmetic product according to claim 1, wherein the higher alcohol contained in the first agent and the second agent does not contain a branched higher alcohol.

Images