Hair treatment composition and method for producing hair treatment composition

Abstract

The present invention provides a hair treatment composition capable of suppressing the expansion of hair after using an oxidation hair dye or a hair bleaching agent while keeping the pH somewhat high.　A hair treatment composition according to the present invention is used by being applied to hair before application of an oxidation hair dye or a hair bleaching agent, and contains: an organic acid (component A) having a molecular weight of 190 or less; and a component B that is ammonia (component B2) and / or an ammonium salt (component B1) which is an organic acid ammonium salt and is such that the molecular weight of the organic acid is 190 or less, wherein the content of component A is 1.0 mass% to 15.0 mass%, and the pH is 2.2 to 4.7.

Description

Hair Treatment Composition and Method for Producing Hair Treatment Composition

[0001] The present invention relates to a hair treatment composition used by being applied to hair before the application of an oxidative hair dye or a hair bleaching agent. The present invention also relates to a method for producing a hair treatment composition used by being applied to hair before the application of an oxidative hair dye or a hair bleaching agent.

[0002] Hair may be dyed with an oxidative hair dye or bleached with a hair bleaching agent. Hair is damaged by hair dyeing treatment or bleaching treatment. In order to suppress hair damage, a hair treatment composition (pretreatment agent) is sometimes applied to hair before the application of an oxidative hair dye or a hair bleaching agent.

[0003] For example, Patent Document 1 below discloses a pretreatment agent for hair coloring containing (A) 0.5 to 10% by weight of cationized cellulose and (B) 0.5 to 20% by weight of a cationic surfactant.

[0004] Japanese Unexamined Patent Application Publication No. 2006-282512

[0005] As a hair treatment composition used by being applied to hair before the application of an oxidative hair dye or a hair bleaching agent, hair treatment compositions containing an organic acid are known. In hair treatment compositions containing an organic acid, the organic acid suppresses hair damage caused by dyeing treatment or bleaching treatment, and particularly suppresses spreading of hair after dyeing treatment or bleaching treatment. However, in conventional hair treatment compositions containing an organic acid, the incorporation of the organic acid tends to cause excessive lowering of pH. When the pH of the hair treatment composition is excessively low (for example, when the pH is 2.0 or lower), there is concern over irritation to the skin.

[0006] When an alkaline agent is simply incorporated into the hair treatment composition to increase the pH, the effect of suppressing hair spreading is reduced, and hair tends to spread easily after use of the oxidative hair dye or the hair bleaching agent.

[0007] The object of the present invention is to provide a hair treatment composition that can suppress hair spreading after the use of an oxidative hair dye or hair bleaching agent while maintaining a relatively high pH. Another object of the present invention is to provide a method for producing a hair treatment composition that can suppress hair spreading after the use of an oxidative hair dye or hair bleaching agent while maintaining a relatively high pH in the resulting hair treatment composition.

[0008] The present invention provides a hair treatment composition for use by applying it to hair before applying an oxidative hair dye or a hair bleaching agent, comprising the following component (A) and the following component (B), wherein the content of component (A) is 1.0% by mass or more and 15.0% by mass or less, and the pH is 2.2 or more and 4.7 or less.

[0009] Component (A): Organic acid with a molecular weight of 190 or less Component (B): The following component (B1) and / or the following component (B2) Component (B1): Ammonium salt of an organic acid, wherein the molecular weight of the organic acid is 190 or less Component (B2): Ammonia

[0010] In the hair treatment composition of the present invention, it is preferable that component (A) contains the following component (A1).

[0011] Component (A1): An organic acid selected from the group consisting of acetic acid, lactic acid, glycolic acid, propionic acid, succinic acid, and levulinic acid.

[0012] In the hair treatment composition of the present invention, it is preferable that the above component (B1) contains the following component (B11).

[0013] Ingredients (B11): Ammonium salts of organic acids selected from the group consisting of ammonium acetate, ammonium lactate, ammonium glycolate, ammonium propionate, ammonium succinate, and ammonium levulinate.

[0014] In the hair treatment composition of the present invention, it is preferable that component (A) contains the following component (A11) and component (A12).

[0015] Ingredients (A11): Lactic acid and / or glycolic acid; Ingredients (A12): Acetic acid and / or propionic acid

[0016] The hair treatment composition of the present invention is preferably used by applying the hair treatment composition to the hair, and then applying an oxidative hair dye or hair bleaching agent to the hair without washing off the hair treatment composition.

[0017] In the hair treatment composition of the present invention, it is preferable that the content of component (B) on an ammonia structure basis is 0.01% by mass or more and 8.0% by mass or less.

[0018] The present invention provides a method for producing a hair treatment composition, wherein the hair treatment composition is used by applying it to hair before applying an oxidative hair dye or a hair bleaching agent, the pH of the hair treatment composition is 2.2 or higher and 4.7 or lower, and the method comprises a mixing step of mixing the following component (A) and the following component (B) such that the amount of the following component (A) is 1.0% or higher and 15.0% or lower based on 100% by mass of the resulting hair treatment composition.

[0019] Component (A): Organic acid with a molecular weight of 190 or less Component (B): The following component (B1) and / or the following component (B2) Component (B1): Ammonium salt of an organic acid, wherein the molecular weight of the organic acid is 190 or less Component (B2): Ammonia

[0020] In the method for producing the hair treatment composition of the present invention, it is preferable that component (A) contains the following component (A1).

[0021] Component (A1): An organic acid selected from the group consisting of acetic acid, lactic acid, glycolic acid, propionic acid, succinic acid, and levulinic acid.

[0022] In the method for producing the hair treatment composition of the present invention, it is preferable that the component (B1) contains the following component (B11).

[0023] Ingredients (B11): Ammonium salts of organic acids selected from the group consisting of ammonium acetate, ammonium lactate, ammonium glycolate, ammonium propionate, ammonium succinate, and ammonium levulinate.

[0024] In the method for producing the hair treatment composition of the present invention, it is preferable that component (A) includes the following component (A11) and component (A12).

[0025] Ingredients (A11): Lactic acid and / or glycolic acid; Ingredients (A12): Acetic acid and / or propionic acid

[0026] In the method for producing the hair treatment composition of the present invention, it is preferable in the mixing step to mix component (A) and component (B) such that the amount of component (B) added in terms of ammonia structure is 0.01% by mass or more and 8.0% by mass or less with respect to 100% by mass of the resulting hair treatment composition.

[0027] The hair treatment composition of the present invention is used by applying it to hair before applying an oxidative hair dye or a hair bleaching agent. The hair treatment composition of the present invention contains a specific component (A) and a specific component (B), wherein the content of component (A) is 1.0% by mass or more and 15.0% by mass or less, and the pH is 2.2 or more and 4.7 or less. Because the hair treatment composition of the present invention has the above configuration, it is possible to suppress the spreading of hair after using an oxidative hair dye or a hair bleaching agent while maintaining a pH that is relatively high.

[0028] The present invention provides a method for producing a hair treatment composition that is applied to hair before applying an oxidative hair dye or a hair bleaching agent. The present invention provides a method for producing a hair treatment composition having a pH of 2.2 or higher and 4.7 or lower. The present invention provides a mixing step of mixing component (A) and specific component (B) such that the amount of specific component (A) is 1.0% or higher and 15.0% or lower based on 100% by mass of the resulting hair treatment composition. Because the present invention provides the above configuration, the resulting hair treatment composition can maintain a relatively high pH while suppressing the spreading of hair after using an oxidative hair dye or a hair bleaching agent.

[0029] The present invention will be described in detail below.

[0030] The hair treatment composition of the present invention is used by applying it to hair before applying an oxidative hair dye or a hair bleaching agent. The hair treatment composition of the present invention contains an "organic acid having a molecular weight of 190 or less". In this specification, the above "organic acid having a molecular weight of 190 or less" may be referred to as "component (A)".

[0031] The hair treatment composition of the present invention comprises "an ammonium salt of an organic acid, wherein the molecular weight of the organic acid is 190 or less" and / or "ammonia." In this specification, the "an ammonium salt of an organic acid, wherein the molecular weight of the organic acid is 190 or less" may be referred to as "component (B1)." In this specification, the "ammonia" may be referred to as "component (B2)." In this specification, "component (B1) and / or component (B2)" may be referred to as "component (B)."

[0032] Therefore, the hair treatment composition of the present invention comprises component (A) and component (B). The hair treatment composition of the present invention comprises component (A) and also comprises component (B1) and / or component (B2).

[0033] In the hair treatment composition of the present invention, the content of component (A) is 1.0% by mass or more and 15.0% by mass or less. The pH of the hair treatment composition of the present invention is 2.2 or more and 4.7 or less.

[0034] The hair treatment composition of the present invention has the above configuration, so that it can suppress the spreading of hair after using an oxidative hair dye or hair bleaching agent while maintaining a relatively high pH.

[0035] The hair treatment composition of the present invention preferably contains "water".

[0036] In this specification, the above-mentioned "water" may be referred to as "component (C)".

[0037] The hair treatment composition of the present invention comprises at least component (A) and component (B). Preferably, the hair treatment composition of the present invention comprises component (C). The hair treatment composition of the present invention may also comprise other components other than components (A) to (C).

[0038] Each of the above components, for example, component (A), component (B), and other components, may be used alone, or two or more thereof may be used.

[0039] In the present specification, the content of each component means the total content of all said components contained in the hair treatment composition. For example, the content of component (A) means the total content of all component (A) in the hair treatment composition.

[0040] Hereinafter, details of each component used in the hair treatment composition of the present invention will be described.

[0041] (Component (A)) Component (A) is an organic acid having a molecular weight of 190 or less. By using component (A), damage to hair after use of an oxidative hair dye or a hair bleaching agent can be suppressed. In particular, spreading of the hair after use of an oxidative hair dye or a hair bleaching agent can be suppressed. Component (A) may be used alone, or two or more thereof may be used in combination.

[0042] The molecular weight of component (A) is 190 or less, preferably 46 or more, preferably 120 or less, and more preferably 100 or less. When the molecular weight of component (A) is not less than the above lower limit and not more than the above upper limit, spreading of hair after use of an oxidative hair dye or a hair bleaching agent can be further suppressed.

[0043] Examples of component (A) include acetic acid, lactic acid, glycolic acid, propionic acid, succinic acid, levulinic acid, mandelic acid, malic acid, and α-ketoglutaric acid.

[0044] Component (A) preferably contains at least one organic acid selected from the group consisting of acetic acid, lactic acid, glycolic acid, propionic acid, succinic acid, and levulinic acid, more preferably contains at least one organic acid selected from the group consisting of lactic acid, glycolic acid, propionic acid, succinic acid, and levulinic acid, and still more preferably contains at least one organic acid selected from the group consisting of lactic acid, glycolic acid, and propionic acid. In this case, spreading of hair after use of an oxidative hair dye or a hair bleaching agent can be further suppressed.

[0045] In this specification, the above-mentioned "organic acid selected from the group consisting of acetic acid, lactic acid, glycolic acid, propionic acid, succinic acid, and levulinic acid" may be referred to as "component (A1)", the above-mentioned "organic acid selected from the group consisting of lactic acid, glycolic acid, propionic acid, succinic acid, and levulinic acid" may be referred to as "component (A1a)", and the above-mentioned "organic acid selected from the group consisting of lactic acid, glycolic acid, and propionic acid" may be referred to as "component (A1b)".

[0046] Therefore, component (A) preferably comprises component (A1), more preferably comprises component (A1a), and still more preferably comprises component (A1b). The hair treatment composition preferably comprises component (A1), more preferably comprises component (A1a), and still more preferably comprises component (A1b).

[0047] Component (A) preferably comprises lactic acid and / or glycolic acid. In this case, spreading of hair after use of an oxidative hair dye or a hair bleaching agent can be further suppressed. Additionally, although this is presumed to be for the purpose of further stabilizing the cortex structure of hair to improve hair strength, the amount of hair breakage that occurs during combing can be reduced.

[0048] Component (A) preferably comprises acetic acid and / or propionic acid. In this case, spreading of hair after use of an oxidative hair dye or a hair bleaching agent can be further suppressed. Additionally, the bleaching power when using an oxidative hair dye or a hair bleaching agent can be further enhanced. Note that, since a bleaching step is also present when dyeing hair with an oxidative hair dye, high bleaching power enables vivid dyeing of hair at high brightness.

[0049] In this specification, the above-mentioned "lactic acid and / or glycolic acid" may be referred to as "component (A11)", and the above-mentioned "acetic acid and / or propionic acid" may be referred to as "component (A12)".

[0050] Therefore, component (A) preferably comprises component (A11), and also preferably comprises component (A12). Component (A) preferably comprises component (A11) and / or component (A12).

[0051] Component (A) is particularly preferably composed of component (A11) and component (A12), particularly preferably composed of lactic acid and component (A12), particularly preferably composed of component (A11) and acetic acid, and most preferably composed of lactic acid and acetic acid. The above hair treatment composition is particularly preferably composed of component (A11) and component (A12), particularly preferably composed of lactic acid and component (A12), particularly preferably composed of component (A11) and acetic acid, and most preferably composed of lactic acid and acetic acid. In this case, the following effects 1) to 3) can be exhibited more effectively: 1) the effect of suppressing hair spreading after using an oxidative hair dye or hair bleaching agent, 2) the effect of reducing the amount of hair breakage that occurs when combing, and 3) the effect of further enhancing the bleaching power when using an oxidative hair dye or hair bleaching agent.

[0052] In 100% by mass of the above hair treatment composition, the content of component (A1b) is preferably 1.0% by mass or more, more preferably 2.0% by mass or more, even more preferably 3.0% by mass or more, preferably 15.0% by mass or less, more preferably 10.0% by mass or less, even more preferably 7.0% by mass or less, and particularly preferably 6.0% by mass or less. When the content of component (A1b) is above the lower limit and below the upper limit, it is possible to further suppress the spreading of hair after using an oxidative hair dye or hair bleaching agent while maintaining the pH of the hair treatment composition at a certain level.

[0053] In 100% by mass of the above hair treatment composition, the content of component (A1a) is preferably 1.0% by mass or more, more preferably 2.0% by mass or more, even more preferably 3.0% by mass or more, preferably 15.0% by mass or less, more preferably 10.0% by mass or less, even more preferably 7.0% by mass or less, and particularly preferably 6.0% by mass or less. When the content of component (A1a) is above the lower limit and below the upper limit, it is possible to further suppress the spreading of hair after using an oxidative hair dye or hair bleaching agent while maintaining the pH of the hair treatment composition at a certain level.

[0054] In 100% by mass of the above hair treatment composition, the content of component (A11) is preferably 1.0% by mass or more, more preferably 2.0% by mass or more, even more preferably 3.0% by mass or more, preferably 15.0% by mass or less, more preferably 10.0% by mass or less, even more preferably 7.0% by mass or less, and particularly preferably 6.0% by mass or less. When the content of component (A11) is above the lower limit above, the spreading of hair after using an oxidative hair dye or hair bleaching agent can be further suppressed. Furthermore, it is presumed that the amount of hair breakage that occurs when combing can be reduced, which is thought to be because the cortex structure of the hair is further stabilized and the strength of the hair is improved.

[0055] In 100% by mass of the above hair treatment composition, the content of component (A12) is preferably 0.5% by mass or more, more preferably 1.0% by mass or more, even more preferably 2.0% by mass or more, preferably 15.0% by mass or less, more preferably 10.0% by mass or less, even more preferably 8.0% by mass or less, even more preferably 7.0% by mass or less, and particularly preferably 6.0% by mass or less. When the content of component (A12) is above the lower limit above, the spreading of hair after using an oxidative hair dye or hair bleach can be further suppressed. In addition, the bleaching power when using an oxidative hair dye or hair bleach can be further enhanced.

[0056] In 100% by mass of the above hair treatment composition, the total amount of component (A11) and component (A12) is preferably 1.0% by mass or more, more preferably 2.0% by mass or more, even more preferably 3.0% by mass or more, preferably 15.0% by mass or less, more preferably 10.0% by mass or less, even more preferably 7.0% by mass or less, and particularly preferably 6.0% by mass or less. When the above total is above the lower limit and below the upper limit, the following effects 1) to 3) can be exhibited more effectively: 1) the effect of suppressing hair spreading after using an oxidative hair dye or hair bleaching agent, 2) the effect of reducing the amount of hair breakage that occurs when combing, and 3) the effect of further enhancing the bleaching power when using an oxidative hair dye or hair bleaching agent.

[0057] From the viewpoint of suppressing hair spreading after using an oxidative hair dye or hair bleach, the content of component (A) in 100% by mass of the above hair treatment composition is 1.0% by mass or more and 15.0% by mass or less.

[0058] In 100% by mass of the above hair treatment composition, the content of component (A) is preferably 2.0% by mass or more, more preferably 3.0% by mass or more, preferably 10.0% by mass or less, more preferably 7.0% by mass or less, and even more preferably 6.0% by mass or less. When the content of component (A) is above the lower limit and below the upper limit, it is possible to further suppress the spreading of hair after using an oxidative hair dye or hair bleaching agent while maintaining the pH of the hair treatment composition at a certain level.

[0059] (Component (B)) Component (B) is an ammonium salt of an organic acid, wherein the molecular weight of the organic acid is 190 or less (component (B1)) and / or ammonia (component (B2)). Component (B) may be component (B1), component (B2), or component (B1) and component (B2). The above hair treatment composition may contain component (B1), component (B2), or component (B1) and component (B2). By using component (B), the pH of the hair treatment composition can be adjusted to a suitable range. Furthermore, by using component (B), the effect of suppressing hair damage (especially hair frizz) caused by component (A) after using an oxidative hair dye or hair bleaching agent can be less likely to decrease.

[0060] <Component (B1)> Component (B1) is an ammonium salt of an organic acid, wherein the molecular weight of the organic acid is 190 or less. Component (B1) may be used alone, or two or more may be used in combination.

[0061] The molecular weight of the organic acid in component (B1) is 190 or less, preferably 46 or more, preferably 120 or less, and more preferably 100 or less. When the molecular weight of the organic acid in component (B1) is above the lower limit and below the upper limit, the spreading of hair after using an oxidative hair dye or hair bleach can be further suppressed.

[0062] Examples of the organic acids in component (B1) include acetic acid, lactic acid, glycolic acid, propionic acid, succinic acid, levulinic acid, mandelic acid, malic acid, and α-ketoglutaric acid.

[0063] Component (B1) preferably contains an ammonium salt of an organic acid selected from the group consisting of ammonium acetate, ammonium lactate, ammonium glycolate, ammonium propionate, ammonium succinate, and ammonium levulinate (at least one ammonium salt of an organic acid), more preferably contains an ammonium salt of an organic acid selected from the group consisting of ammonium lactate, ammonium glycolate, ammonium propionate, ammonium succinate, and ammonium levulinate (at least one ammonium salt of an organic acid), even more preferably contains an ammonium salt of an organic acid selected from the group consisting of ammonium lactate, ammonium glycolate, and ammonium propionate (at least one ammonium salt of an organic acid), and particularly preferably contains ammonium lactate and / or ammonium glycolate. In this case, the spreading of hair after using an oxidative hair dye or hair bleach can be further suppressed.

[0064] In this specification, the above-mentioned "ammonium salt of an organic acid selected from the group consisting of ammonium acetate, ammonium lactate, ammonium glycolate, ammonium propionate, ammonium succinate, and ammonium levulinate" may be referred to as "component (B11)", the above-mentioned "ammonium salt of an organic acid selected from the group consisting of ammonium lactate, ammonium glycolate, ammonium propionate, ammonium succinate, and ammonium levulinate" may be referred to as "component (B11a)", and the above-mentioned "ammonium salt of an organic acid selected from the group consisting of ammonium lactate, ammonium glycolate, and ammonium propionate" may be referred to as "component (B11b)".

[0065] Therefore, component (B1) preferably contains component (B11), more preferably contains component (B11a), even more preferably contains component (B11b), and particularly preferably contains ammonium lactate and / or ammonium glycolate. The above hair treatment composition preferably contains component (B11), more preferably contains component (B11a), even more preferably contains component (B11b), and particularly preferably contains ammonium lactate and / or ammonium glycolate.

[0066] In 100% by mass of the above hair treatment composition, the content of component (B11b) is preferably 0.1% by mass or more, more preferably 0.8% by mass or more, even more preferably 1.5% by mass or more, preferably 45.0% by mass or less, more preferably 30.0% by mass or less, and even more preferably 10.0% by mass or less. When the content of component (B11b) is above the lower limit and below the upper limit, the spreading of hair after using an oxidative hair dye or hair bleaching agent can be further suppressed. In addition, it becomes easier to adjust the pH of the hair treatment composition to a suitable range.

[0067] In 100% by mass of the above hair treatment composition, the content of component (B11a) is preferably 0.1% by mass or more, more preferably 0.8% by mass or more, even more preferably 1.5% by mass or more, preferably 45.0% by mass or less, more preferably 30.0% by mass or less, and even more preferably 10.0% by mass or less. When the content of component (B11a) is above the lower limit and below the upper limit, the spreading of hair after using an oxidative hair dye or hair bleaching agent can be further suppressed. In addition, it becomes easier to adjust the pH of the hair treatment composition to a suitable range.

[0068] In 100% by mass of the above hair treatment composition, the content of component (B11) is preferably 0.1% by mass or more, more preferably 0.8% by mass or more, even more preferably 1.5% by mass or more, preferably 45.0% by mass or less, more preferably 30.0% by mass or less, and even more preferably 10.0% by mass or less. When the content of component (B11) is above the lower limit and below the upper limit, the spreading of hair after using an oxidative hair dye or hair bleaching agent can be further suppressed. In addition, it becomes easier to adjust the pH of the hair treatment composition to a suitable range.

[0069] In 100% by mass of the above hair treatment composition, the content of component (B1) is preferably 0.1% by mass or more, more preferably 0.8% by mass or more, even more preferably 1.5% by mass or more, preferably 45.0% by mass or less, more preferably 30.0% by mass or less, and even more preferably 10.0% by mass or less. When the content of component (B1) is above the lower limit and below the upper limit, the spreading of hair after using an oxidative hair dye or hair bleaching agent can be further suppressed. In addition, it becomes easier to adjust the pH of the hair treatment composition to a suitable range.

[0070] <Component (B2)> Component (B2) is ammonia.

[0071] If component (A) contains component (A11) and component (A12), it is particularly preferable that the hair treatment composition also contains component (B2).

[0072] In 100% by mass of the above hair treatment composition, the content of component (B2) is preferably 0.01% by mass or more, more preferably 0.08% by mass or more, even more preferably 0.15% by mass or more, preferably 8.0% by mass or less, more preferably 5.0% by mass or less, and even more preferably 2.0% by mass or less. When the content of component (B2) is above the lower limit and below the upper limit, the spreading of hair after using an oxidative hair dye or hair bleaching agent can be further suppressed. In addition, it becomes easier to adjust the pH of the hair treatment composition to a suitable range.

[0073] <Further details of component (B)> In 100% by mass of the above hair treatment composition, the content of component (B) in terms of ammonia structure is preferably 0.01% by mass or more, more preferably 0.08% by mass or more, even more preferably 0.15% by mass or more, preferably 8.0% by mass or less, more preferably 5.0% by mass or less, and even more preferably 2.0% by mass or less. When the content of component (B) in terms of ammonia structure is above the lower limit and below the upper limit, the spreading of hair after using an oxidative hair dye or hair bleaching agent can be further suppressed. In addition, it becomes easier to adjust the pH of the hair treatment composition to a suitable range.

[0074] The above ammonia content on a structural basis means the content of ammonia [component (B2)] when component (B) is ammonia [component (B2)], and the content expressed by the following formula when component (B) is an ammonium salt of an organic acid [component (B1)]. Furthermore, when component (B) contains both component (B1) and component (B2), the above ammonia content on a structural basis means the sum of the ammonia content and the content expressed by the following formula.

[0075] Ammonia content (mass%) of ammonium salts of organic acids, calculated on an ammonia structure basis = Ammonia content (mass%) of ammonium salts of organic acids × (Molecular weight of ammonia / Molecular weight of ammonium salt of organic acid)

[0076] In 100% by mass of the above hair treatment composition, the content of component (B11b) in terms of ammonia structure is preferably 0.01% by mass or more, more preferably 0.08% by mass or more, even more preferably 0.15% by mass or more, preferably 8.0% by mass or less, more preferably 5.0% by mass or less, and even more preferably 2.0% by mass or less. When the content of component (B11b) in terms of ammonia structure is above the lower limit and below the upper limit, the spreading of hair after using an oxidative hair dye or hair bleaching agent can be further suppressed. In addition, it becomes easier to adjust the pH of the hair treatment composition to a suitable range.

[0077] In 100% by mass of the above hair treatment composition, the content of component (B11a) in terms of ammonia structure is preferably 0.01% by mass or more, more preferably 0.08% by mass or more, even more preferably 0.15% by mass or more, preferably 8.0% by mass or less, more preferably 5.0% by mass or less, and even more preferably 2.0% by mass or less. When the content of component (B11a) in terms of ammonia structure is above the lower limit and below the upper limit, the spreading of hair after using an oxidative hair dye or hair bleaching agent can be further suppressed. In addition, it becomes easier to adjust the pH of the hair treatment composition to a suitable range.

[0078] In 100% by mass of the above hair treatment composition, the content of component (B11) in terms of ammonia structure is preferably 0.01% by mass or more, more preferably 0.08% by mass or more, even more preferably 0.15% by mass or more, preferably 8.0% by mass or less, more preferably 5.0% by mass or less, and even more preferably 2.0% by mass or less. When the content of component (B11) in terms of ammonia structure is above the lower limit and below the upper limit, the spreading of hair after using an oxidative hair dye or hair bleaching agent can be further suppressed. In addition, it becomes easier to adjust the pH of the hair treatment composition to a suitable range.

[0079] In 100% by mass of the above hair treatment composition, the content of component (B1) in terms of ammonia structure is preferably 0.01% by mass or more, more preferably 0.08% by mass or more, even more preferably 0.15% by mass or more, preferably 8.0% by mass or less, more preferably 5.0% by mass or less, and even more preferably 2.0% by mass or less. When the content of component (B1) in terms of ammonia structure is above the lower limit and below the upper limit, the spreading of hair after using an oxidative hair dye or hair bleaching agent can be further suppressed. In addition, it becomes easier to adjust the pH of the hair treatment composition to a suitable range.

[0080] (Component (C)) Component (C) is water. Component (C) acts as a base. Component (C) is preferably purified water.

[0081] In 100% by mass of the above hair treatment composition, the content of component (C) is preferably 30.0% by mass or more, more preferably 50.0% by mass or more, preferably 95.0% by mass or less, and more preferably 90.0% by mass or less.

[0082] (Other components) The above hair treatment composition may contain other components other than the components (A) to (C) described above. These other components may include lower alcohols such as ethanol; polyhydric alcohols; higher alcohols; organic acids other than component (A); organic salts other than component (B); cellulosic water-soluble polymers such as methylcellulose, ethylcellulose, hydroxymethylcellulose, hydroxyethylcellulose, carboxymethylcellulose; gelatin, alginate; polysaccharide polymers such as xanthan gum, guar gum, carrageenan, pectin, locust bean gum; (acrylates / steareth-20 methacrylate) copolymer, (acrylates / steareth-20 methacrylate) crosspolymer, (acrylates / beheneth-25 methacrylate) copolymer, Examples include acrylic water-soluble polymers such as (acrylates / vinyl neodecanoate) crosspolymer, (sodium acrylate / sodium acryloyldimethyl taurate) copolymer, and (hydroxyethyl acrylate / sodium acryloyldimethyl taurate) copolymer; hydrocarbon oils such as liquid paraffin; ester oils; silicone oils such as dimethicone, amodimethicone, and polyether-modified silicones; vegetable oils; cationic surfactants; anionic surfactants; amphoteric surfactants; nonionic surfactants; humectants; bactericides; pearlescent agents; cooling agents such as menthol; fragrances; UV absorbers; antioxidants; metal ion chelating agents; vitamins; amino acids, etc.

[0083] <Ethanol> The above hair treatment composition preferably contains ethanol. In this case, the volatility of the above hair treatment composition can be increased, so that the oxidative hair dye or hair bleaching agent does not become diluted in the subsequent process. Therefore, the bleaching power and hair dyeing power when using the oxidative hair dye or hair bleaching agent can be further enhanced.

[0084] In 100% by mass of the above hair treatment composition, the ethanol content is preferably 3.0% by mass or more, more preferably 5.0% by mass or more, even more preferably 7.0% by mass or more, preferably 20.0% by mass or less, and more preferably 15.0% by mass or less. When the ethanol content is above the lower limit and below the upper limit, the bleaching power and dyeing power when using an oxidative hair dye or hair bleaching agent can be further enhanced.

[0085] <Organic acids and / or salts thereof having a molecular weight greater than 190 and less than or equal to 220> The above hair treatment composition does not contain or contains organic acids and / or salts thereof having a molecular weight greater than 190 and less than or equal to 220. In this specification, the above "organic acids and / or salts thereof having a molecular weight greater than 190 and less than or equal to 220" may be referred to as "component (X)". Component (X) is "an organic acid having a molecular weight greater than 190 and less than or equal to 220" and / or "a salt of an organic acid, wherein the molecular weight of the organic acid is greater than 190 and less than or equal to 220".

[0086] Examples of component (X) include citric acid and its salts.

[0087] The above hair treatment composition preferably contains no citric acid and / or its salts or contains them in an amount of 5.0% by mass or less. In this case, the effects of the present invention can be exhibited even more effectively. The content of the above citric acid and / or its salts in 100% by mass of the above hair treatment composition is preferably 0% by mass or more, preferably 5.0% by mass or less, more preferably 3.0% by mass or less, and even more preferably 1.0% by mass or less. It is most preferable that the above hair treatment composition does not contain citric acid and / or its salts.

[0088] The above hair treatment composition preferably contains no component (X) or contains it in an amount of 5.0% by mass or less. In this case, the effects of the present invention can be exhibited even more effectively. The content of component (X) in 100% by mass of the above hair treatment composition is preferably 0% by mass or more, preferably 5.0% by mass or less, more preferably 3.0% by mass or less, and even more preferably 1.0% by mass or less. It is most preferable that the above hair treatment composition does not contain component (X).

[0089] (Further details of the hair treatment composition) From the viewpoint of reducing skin irritation, the pH of the above hair treatment composition is 2.2 or higher, preferably 2.5 or higher, and more preferably 3.0 or higher. The hair treatment composition of the present invention is characterized in that, despite having a relatively high pH as described above, it can suppress the spreading of hair after using an oxidative hair dye or hair bleaching agent.

[0090] From the viewpoint of suppressing hair spreading after using an oxidative hair dye or hair bleach, the pH of the above hair treatment composition is 4.7 or less. From the viewpoint of further suppressing hair spreading after using an oxidative hair dye or hair bleach, the pH of the above hair treatment composition is preferably 4.5 or less, more preferably 4.0 or less.

[0091] In other words, the pH of the above hair treatment composition is 2.2 or higher and 4.7 or lower, preferably 2.5 or higher, more preferably 3.0 or higher, preferably 4.5 or lower, and more preferably 4.0 or lower.

[0092] The above hair treatment composition is used by applying it to hair before applying an oxidative hair dye or a hair bleaching agent. The above hair treatment composition is a pre-treatment agent and a plexing agent. The above hair treatment composition may be used by applying it to hair before applying an oxidative hair dye, or by applying it to hair before applying a hair bleaching agent. Although hair tends to spread out particularly easily after using a hair bleaching agent, by using the hair treatment composition of the present invention, it is possible to effectively suppress hair spreading even after using a hair bleaching agent. Note that hair bleaching agents are sometimes called hair decolorizing agents.

[0093] The above hair treatment composition is preferably used by applying the hair treatment composition to the hair and then applying an oxidative hair dye or hair bleach to the hair without washing off the hair treatment composition. The above hair treatment composition is preferably used without washing off the hair between the time the hair treatment composition is applied to the hair and the time the oxidative hair dye or hair bleach is applied to the hair. The above hair treatment composition is preferably used to apply an oxidative hair dye or hair bleach to hair that has the hair treatment composition applied to it. In this case, the spreading of hair after using the oxidative hair dye or hair bleach can be further suppressed.

[0094] The above-mentioned hair treatment composition can be used, for example, in a form filled into a container. Examples of such containers include pouches, tubes, and bottles.

[0095] (Method for manufacturing the hair treatment composition) Next, the method for manufacturing the hair treatment composition described above will be explained.

[0096] The above method for producing the hair treatment composition is a method for producing a hair treatment composition that is used by applying it to hair before applying an oxidative hair dye or a hair bleaching agent. The above method for producing the hair treatment composition preferably includes a mixing step of mixing component (A) and component (B) such that the amount of component (A) blended (added) is 1.0% by mass or more and 15.0% by mass or less based on 100% by mass of the resulting hair treatment composition to obtain the above hair treatment composition (a hair treatment composition having a pH of 2.2 or more and 4.7 or less). In the above mixing step, it is preferable to blend (add) component (A) in an amount of 1.0% by mass or more and 15.0% by mass or less based on 100% by mass of the resulting hair treatment composition.

[0097] In the above mixing step, it is preferable to mix component (A) and component (B) such that the amount of component (A) added is 1.0% by mass or more and 15.0% by mass or less, and the amount of components other than component (A) added is 85.0% by mass or more and 99.0% by mass or less, based on 100% by mass of the resulting hair treatment composition, in order to obtain the above hair treatment composition (a hair treatment composition having a pH of 2.2 or more and 4.7 or less). Note that the above "components other than component (A)" are components that include component (B). The sum of the "amount of component (A)" and the "amount of components other than component (A)" is 100% by mass (100% by mass of the resulting hair treatment composition). In the above mixing step, it is preferable to add components other than component (A) in an amount of 85.0% by mass or more and 99.0% by mass or less, based on 100% by mass of the resulting hair treatment composition.

[0098] In the above mixing step, the amount of component (A) blended with respect to 100% by mass of the resulting hair treatment composition is preferably 2.0% by mass or more, more preferably 3.0% by mass or more, preferably 10.0% by mass or less, more preferably 7.0% by mass or less, and even more preferably 6.0% by mass or less. That is, in the above mixing step, the amount of components other than component (A) blended with respect to 100% by mass of the resulting hair treatment composition is preferably 90.0% by mass or more, more preferably 93.0% by mass or more, even more preferably 94.0% by mass or more, preferably 98.0% by mass or less, and even more preferably 97.0% by mass or less. When the amount of component (A) blended is above the lower limit and below the upper limit, the resulting hair treatment composition can maintain a relatively high pH while further suppressing hair spreading after using an oxidative hair dye or hair bleaching agent.

[0099] In the method for producing the above hair treatment composition, component (A) preferably contains component (A1), more preferably contains component (A1a), and even more preferably contains component (A1b). Furthermore, in the method for producing the above hair treatment composition, component (A) preferably contains component (A11), and also preferably contains component (A12). In the method for producing the above hair treatment composition, component (A) preferably contains component (A11) and / or component (A12).

[0100] In the method for producing the above-described hair treatment composition, component (A) is particularly preferably composed of component (A11) and component (A12), particularly preferably composed of lactic acid and component (A12), particularly preferably composed of component (A11) and acetic acid, and most preferably composed of lactic acid and acetic acid.

[0101] In the above mixing step, it is preferable to mix component (A) and component (B) such that the amount of component (A1a) is 1.0% by mass or more and 15.0% by mass or less based on 100% by mass of the resulting hair treatment composition. In the above mixing step, it is preferable to blend component (A1a) in an amount of 1.0% by mass or more and 15.0% by mass or less based on 100% by mass of the resulting hair treatment composition. In this case, the resulting hair treatment composition can further suppress the spreading of hair after using an oxidative hair dye or hair bleaching agent.

[0102] In the above mixing step, the amount of component (A1a) blended with respect to 100% by mass of the resulting hair treatment composition is more preferably 2.0% by mass or more, even more preferably 3.0% by mass or more, more preferably 10.0% by mass or less, even more preferably 7.0% by mass or less, and particularly preferably 6.0% by mass or less. When the amount of component (A1a) blended is above the lower limit and below the upper limit, the resulting hair treatment composition can maintain a relatively high pH while further suppressing the spreading of hair after using an oxidative hair dye or hair bleaching agent.

[0103] In the above mixing step, it is preferable to mix component (A) and component (B) such that the amount of component (A1b) is 1.0% by mass or more and 15.0% by mass or less based on 100% by mass of the resulting hair treatment composition. In the above mixing step, it is preferable to blend component (A1b) in an amount of 1.0% by mass or more and 15.0% by mass or less based on 100% by mass of the resulting hair treatment composition. In this case, the resulting hair treatment composition can further suppress the spreading of hair after using an oxidative hair dye or hair bleaching agent.

[0104] In the above mixing step, the amount of component (A1b) blended with respect to 100% by mass of the resulting hair treatment composition is more preferably 2.0% by mass or more, even more preferably 3.0% by mass or more, more preferably 10.0% by mass or less, even more preferably 7.0% by mass or less, and particularly preferably 6.0% by mass or less. When the amount of component (A1b) blended is above the lower limit and below the upper limit, the resulting hair treatment composition can maintain a relatively high pH while further suppressing the spreading of hair after using an oxidative hair dye or hair bleaching agent.

[0105] In the above mixing step, it is preferable to mix component (A) and component (B) such that the amount of component (A11) is 1.0% by mass or more and 15.0% by mass or less based on 100% by mass of the resulting hair treatment composition. In the above mixing step, it is preferable to blend component (A11) in an amount of 1.0% by mass or more and 15.0% by mass or less based on 100% by mass of the resulting hair treatment composition. In this case, the resulting hair treatment composition can further suppress the spreading of hair after using an oxidative hair dye or hair bleaching agent. It is also presumed that this is because it further stabilizes the cortex structure of the hair and improves the strength of the hair, and the amount of hair breakage that occurs when combing can be reduced.

[0106] In the above mixing step, the amount of component (A11) blended with respect to 100% by mass of the resulting hair treatment composition is more preferably 2.0% by mass or more, even more preferably 3.0% by mass or more, more preferably 10.0% by mass or less, even more preferably 7.0% by mass or less, and particularly preferably 6.0% by mass or less. When the amount of component (A11) blended is above the lower limit and below the upper limit, the resulting hair treatment composition can maintain a relatively high pH while further suppressing the spreading of hair after using an oxidative hair dye or hair bleaching agent. Furthermore, it is presumed that this is because it further stabilizes the cortex structure of the hair and improves the strength of the hair, and the amount of hair breakage that occurs when combing can be reduced.

[0107] In the above mixing step, it is preferable to mix component (A) and component (B) such that the amount of component (A12) is 0.5% by mass or more and 15.0% by mass or less based on 100% by mass of the resulting hair treatment composition. In the above mixing step, it is preferable to blend component (A12) in an amount of 0.5% by mass or more and 15.0% by mass or less based on 100% by mass of the resulting hair treatment composition. In this case, the resulting hair treatment composition can further suppress the spreading of hair after using an oxidative hair dye or hair bleaching agent. In addition, the bleaching power when using an oxidative hair dye or hair bleaching agent can be further enhanced.

[0108] In the above mixing step, the amount of component (A12) blended with respect to 100% by mass of the resulting hair treatment composition is more preferably 1.0% by mass or more, even more preferably 2.0% by mass or more, more preferably 10.0% by mass or less, even more preferably 8.0% by mass or less, even more preferably 7.0% by mass or less, and particularly preferably 6.0% by mass or less. When the amount of component (A12) blended is above the lower limit and below the upper limit, the resulting hair treatment composition can maintain a relatively high pH while further suppressing hair spreading after using an oxidative hair dye or hair bleaching agent. In addition, the bleaching power when using an oxidative hair dye or hair bleaching agent can be further enhanced.

[0109] In the above mixing step, it is preferable to mix component (A) and component (B) such that the total amount of component (A11) and component (A12) is 1.0% by mass or more and 15.0% by mass or less based on 100% by mass of the resulting hair treatment composition. In the above mixing step, it is preferable to blend component (A11) and component (A12) in a total amount of 1.0% by mass or more and 15.0% by mass or less based on 100% by mass of the resulting hair treatment composition. In this case, the resulting hair treatment composition can more effectively exhibit the following effects: 1) the effect of suppressing hair spreading after using an oxidative hair dye or hair bleaching agent, 2) the effect of reducing the amount of hair breakage that occurs when combing, and 3) the effect of further enhancing the bleaching power when using an oxidative hair dye or hair bleaching agent.

[0110] In the above mixing step, the total amount of component (A11) and component (A12) blended relative to 100% by mass of the resulting hair treatment composition is more preferably 2.0% by mass or more, even more preferably 3.0% by mass or more, more preferably 10.0% by mass or less, even more preferably 7.0% by mass or less, and particularly preferably 6.0% by mass or less. When the above total is above the lower limit and below the upper limit, the resulting hair treatment composition can more effectively exhibit the following effects: 1) the effect of suppressing hair spreading after using an oxidative hair dye or hair bleaching agent, 2) the effect of reducing the amount of hair breakage that occurs when combing, and 3) the effect of further enhancing the bleaching power when using an oxidative hair dye or hair bleaching agent.

[0111] In the above mixing step, it is preferable to mix component (A) and component (B) such that the amount of component (B) added (based on ammonia structure) is 0.01% by mass or more and 8.0% by mass or less per 100% by mass of the resulting hair treatment composition. In the above mixing step, it is preferable to add component (B) in an amount of 0.01% by mass or more and 8.0% by mass or less per 100% by mass of the resulting hair treatment composition, based on ammonia structure. In this case, the resulting hair treatment composition can further suppress hair spreading after using an oxidative hair dye or hair bleaching agent. In addition, it becomes easier to adjust the pH of the hair treatment composition to a suitable range.

[0112] In the above mixing step, the amount of component (B) in terms of ammonia structure relative to 100% by mass of the resulting hair treatment composition is more preferably 0.08% by mass or more, even more preferably 0.15% by mass or more, even more preferably 5.0% by mass or less, and even more preferably 2.0% by mass or less. When the amount of component (B) in terms of ammonia structure is above the lower limit and below the upper limit, the resulting hair treatment composition can further suppress hair spreading after using an oxidative hair dye or hair bleaching agent. In addition, it becomes easier to adjust the pH of the hair treatment composition to a suitable range.

[0113] When component (B) contains component (B1), it is preferable in the mixing step to mix component (A) and component (B) such that the amount of component (B1) is 0.1% by mass or more and 45.0% by mass or less based on 100% by mass of the resulting hair treatment composition. In the mixing step, it is preferable to blend component (B1) in an amount of 0.1% by mass or more and 45.0% by mass or less based on 100% by mass of the resulting hair treatment composition. In this case, the resulting hair treatment composition can further suppress the spreading of hair after using an oxidative hair dye or hair bleaching agent. In addition, it becomes easier to adjust the pH of the hair treatment composition to a suitable range.

[0114] When component (B) contains component (B1), in the above mixing step, the amount of component (B1) blended with 100% by mass of the resulting hair treatment composition is more preferably 0.8% by mass or more, even more preferably 1.5% by mass or more, more preferably 30.0% by mass or less, and even more preferably 10.0% by mass or less. When the amount of component (B1) blended is above the lower limit and below the upper limit, the resulting hair treatment composition can further suppress the spreading of hair after using an oxidative hair dye or hair bleaching agent. In addition, it becomes easier to adjust the pH of the hair treatment composition to a suitable range.

[0115] When component (B) contains component (B1), it is preferable in the mixing step to mix component (A) and component (B) such that the amount of component (B1) added in terms of ammonia structure is 0.01% by mass or more and 8.0% by mass or less per 100% by mass of the resulting hair treatment composition. In the mixing step, it is preferable to add component (B1) in an amount of 0.01% by mass or more and 8.0% by mass or less per 100% by mass of the resulting hair treatment composition in terms of ammonia structure. In this case, the resulting hair treatment composition can further suppress the spreading of hair after using an oxidative hair dye or hair bleaching agent. In addition, it becomes easier to adjust the pH of the hair treatment composition to a suitable range.

[0116] When component (B) contains component (B1), in the above mixing step, the amount of component (B1) in terms of ammonia structure relative to 100% by mass of the resulting hair treatment composition is more preferably 0.08% by mass or more, even more preferably 0.15% by mass or more, more preferably 5.0% by mass or less, and even more preferably 2.0% by mass or less. When the amount of component (B1) in terms of ammonia structure is above the lower limit and below the upper limit, the resulting hair treatment composition can further suppress hair spreading after using an oxidative hair dye or hair bleaching agent. In addition, it becomes easier to adjust the pH of the hair treatment composition to a suitable range.

[0117] In the method for producing the above-described hair treatment composition, component (B) preferably contains component (B11), more preferably contains component (B11a), even more preferably contains component (B11b), and even more preferably contains ammonium lactate and / or ammonium glycolate.

[0118] In the above mixing step, it is preferable to mix component (A) and component (B) such that the amount of component (B11) is 0.1% by mass or more and 45.0% by mass or less based on 100% by mass of the resulting hair treatment composition. In the above mixing step, it is preferable to blend component (B11) in an amount of 0.1% by mass or more and 45.0% by mass or less based on 100% by mass of the resulting hair treatment composition. In this case, the resulting hair treatment composition can further suppress the spreading of hair after using an oxidative hair dye or hair bleaching agent. In addition, it becomes easier to adjust the pH of the hair treatment composition to a suitable range.

[0119] In the above mixing step, the amount of component (B11) blended with respect to 100% by mass of the resulting hair treatment composition is more preferably 0.8% by mass or more, even more preferably 1.5% by mass or more, even more preferably 30.0% by mass or less, and even more preferably 10.0% by mass or less. When the amount of component (B11) blended is above the lower limit and below the upper limit, the resulting hair treatment composition can further suppress the spreading of hair after using an oxidative hair dye or hair bleaching agent. In addition, it becomes easier to adjust the pH of the hair treatment composition to a suitable range.

[0120] In the above mixing step, it is preferable to mix component (A) and component (B) such that the amount of component (B11) added in terms of ammonia structure is 0.01% by mass or more and 8.0% by mass or less based on 100% by mass of the resulting hair treatment composition. In the above mixing step, it is preferable to add component (B11) in an amount of 0.01% by mass or more and 8.0% by mass or less based on ammonia structure, based on 100% by mass of the resulting hair treatment composition. In this case, the resulting hair treatment composition can further suppress the spreading of hair after using an oxidative hair dye or hair bleaching agent. In addition, it becomes easier to adjust the pH of the hair treatment composition to a suitable range.

[0121] In the above mixing step, the amount of component (B11) in terms of ammonia structure relative to 100% by mass of the resulting hair treatment composition is more preferably 0.08% by mass or more, even more preferably 0.15% by mass or more, even more preferably 5.0% by mass or less, and even more preferably 2.0% by mass or less. When the amount of component (B11) in terms of ammonia structure is above the lower limit and below the upper limit, the resulting hair treatment composition can further suppress hair spreading after using an oxidative hair dye or hair bleaching agent. In addition, it becomes easier to adjust the pH of the hair treatment composition to a suitable range.

[0122] In the above mixing step, it is preferable to mix component (A) and component (B) such that the amount of component (B11a) is 0.1% by mass or more and 45.0% by mass or less based on 100% by mass of the resulting hair treatment composition. In the above mixing step, it is preferable to blend component (B11a) in an amount of 0.1% by mass or more and 45.0% by mass or less based on 100% by mass of the resulting hair treatment composition. In this case, the resulting hair treatment composition can further suppress the spreading of hair after using an oxidative hair dye or hair bleaching agent. In addition, it becomes easier to adjust the pH of the hair treatment composition to a suitable range.

[0123] In the above mixing step, the amount of component (B11a) blended with respect to 100% by mass of the resulting hair treatment composition is more preferably 0.8% by mass or more, even more preferably 1.5% by mass or more, even more preferably 30.0% by mass or less, and even more preferably 10.0% by mass or less. When the amount of component (B11) blended is above the lower limit and below the upper limit, the resulting hair treatment composition can further suppress the spreading of hair after using an oxidative hair dye or hair bleaching agent. In addition, it becomes easier to adjust the pH of the hair treatment composition to a suitable range.

[0124] In the above mixing step, it is preferable to mix component (A) and component (B) such that the amount of component (B11a) added in terms of ammonia structure is 0.01% by mass or more and 8.0% by mass or less based on 100% by mass of the resulting hair treatment composition. In the above mixing step, it is preferable to add component (B11a) in an amount of 0.01% by mass or more and 8.0% by mass or less based on ammonia structure, based on 100% by mass of the resulting hair treatment composition. In this case, the resulting hair treatment composition can further suppress the spreading of hair after using an oxidative hair dye or hair bleaching agent. In addition, it becomes easier to adjust the pH of the hair treatment composition to a suitable range.

[0125] In the above mixing step, the amount of component (B11a) in terms of ammonia structure relative to 100% by mass of the resulting hair treatment composition is more preferably 0.08% by mass or more, even more preferably 0.15% by mass or more, even more preferably 5.0% by mass or less, and even more preferably 2.0% by mass or less. When the amount of component (B11a) in terms of ammonia structure is above the lower limit and below the upper limit, the resulting hair treatment composition can further suppress hair spreading after using an oxidative hair dye or hair bleaching agent. In addition, it becomes easier to adjust the pH of the hair treatment composition to a suitable range.

[0126] In the above mixing step, it is preferable to mix component (A) and component (B) such that the amount of component (B11b) is 0.1% by mass or more and 45.0% by mass or less based on 100% by mass of the resulting hair treatment composition. In the above mixing step, it is preferable to blend component (B11b) in an amount of 0.1% by mass or more and 45.0% by mass or less based on 100% by mass of the resulting hair treatment composition. In this case, the resulting hair treatment composition can further suppress the spreading of hair after using an oxidative hair dye or hair bleaching agent. In addition, it becomes easier to adjust the pH of the hair treatment composition to a suitable range.

[0127] In the above mixing step, the amount of component (B11b) blended with respect to 100% by mass of the resulting hair treatment composition is more preferably 0.8% by mass or more, even more preferably 1.5% by mass or more, even more preferably 30.0% by mass or less, and even more preferably 10.0% by mass or less. When the amount of component (B11b) blended is above the lower limit and below the upper limit, the resulting hair treatment composition can further suppress the spreading of hair after using an oxidative hair dye or hair bleaching agent. In addition, it becomes easier to adjust the pH of the hair treatment composition to a suitable range.

[0128] In the above mixing step, it is preferable to mix component (A) and component (B) such that the amount of component (B11b) added in terms of ammonia structure is 0.01% by mass or more and 8.0% by mass or less based on 100% by mass of the resulting hair treatment composition. In the above mixing step, it is preferable to add component (B11b) in an amount of 0.01% by mass or more and 8.0% by mass or less based on ammonia structure, based on 100% by mass of the resulting hair treatment composition. In this case, the resulting hair treatment composition can further suppress hair spreading after using an oxidative hair dye or hair bleaching agent. In addition, it becomes easier to adjust the pH of the hair treatment composition to a suitable range.

[0129] In the above mixing step, the amount of component (B11b) in terms of ammonia structure relative to 100% by mass of the resulting hair treatment composition is more preferably 0.08% by mass or more, even more preferably 0.15% by mass or more, more preferably 5.0% by mass or less, and even more preferably 2.0% by mass or less. When the amount of component (B11b) in terms of ammonia structure is above the lower limit and below the upper limit, the resulting hair treatment composition can further suppress hair spreading after using an oxidative hair dye or hair bleaching agent. In addition, it becomes easier to adjust the pH of the hair treatment composition to a suitable range.

[0130] When component (B) contains component (B2), it is preferable in the mixing step to mix component (A) and component (B) such that the amount of component (B2) blended is 0.01% by mass or more and 8.0% by mass or less based on 100% by mass of the resulting hair treatment composition. In the mixing step, it is preferable to blend component (B2) in an amount of 0.01% by mass or more and 8.0% by mass or less based on 100% by mass of the resulting hair treatment composition. In this case, the resulting hair treatment composition can further suppress the spreading of hair after using an oxidative hair dye or hair bleaching agent. In addition, it becomes easier to adjust the pH of the hair treatment composition to a suitable range.

[0131] When component (B) contains component (B2), in the above mixing step, the amount of component (B2) blended relative to 100% by mass of the resulting hair treatment composition is more preferably 0.08% by mass or more, even more preferably 0.15% by mass or more, more preferably 5.0% by mass or less, and even more preferably 2.0% by mass or less. When the amount of component (B2) blended is above the lower limit and below the upper limit, the resulting hair treatment composition can further suppress the spreading of hair after using an oxidative hair dye or hair bleaching agent. In addition, it becomes easier to adjust the pH of the hair treatment composition to a suitable range.

[0132] In the above mixing step, it is preferable to mix component (A), component (B), and component (C) to obtain the hair treatment composition, and it is more preferable to mix component (A), component (B), component (C), and other components that may be added as needed to obtain the hair treatment composition. In the above mixing step, the mixing order of each component is not particularly limited.

[0133] In the above mixing step, it is preferable to mix component (A), component (B), and component (C) such that the amount of component (C) added (added) is 30.0% by mass or more and 95.0% by mass or less relative to 100% by mass of the hair treatment composition obtained.

[0134] In the above mixing step, the amount of component (C) blended relative to 100% by mass of the resulting hair treatment composition is more preferably 50.0% by mass or more, and more preferably 90.0% by mass or less.

[0135] In the mixing step described above, the pH of the resulting hair treatment composition is 2.2 or higher and 4.7 or lower, preferably 2.5 or higher, more preferably 3.0 or higher, preferably 4.5 or lower, and more preferably 4.0 or lower. If the pH is above the lower limit, the resulting hair treatment composition can be made even less irritating to the skin. If the pH is below the upper limit, the resulting hair treatment composition can be made even less likely to cause hair to spread after using an oxidative hair dye or hair bleaching agent.

[0136] In the above mixing process, methods for mixing each component include using stirring devices such as disperser mixers, homomixers, and paddle mixers.

[0137] (Method of using the hair treatment composition) The hair treatment method using the above hair treatment composition is as follows: After applying the above hair treatment composition to the hair, apply an oxidative hair dye or a hair bleaching agent to the hair to perform the dyeing or bleaching treatment. It is preferable to apply the oxidative hair dye or hair bleaching agent to the hair without washing off the above hair treatment composition from the hair. The time between applying the above hair treatment composition to the hair and applying the oxidative hair dye or hair bleaching agent to the hair is not particularly limited. For example, the oxidative hair dye or hair bleaching agent may be applied to the hair immediately after applying the above hair treatment composition to the hair, or the oxidative hair dye or hair bleaching agent may be applied to the hair after leaving it for about 1 to 10 minutes after applying the above hair treatment composition to the hair.

[0138] The present invention will be described in detail below with reference to examples and comparative examples. The present invention is not limited to the following examples.

[0139] The following components were used in the preliminary experiments, examples, and comparative examples.

[0140] (Ingredients (A)) Acetate lactate, glycolic acid, propionic acid, succinic acid, levulinic acid, mandelic acid, malic acid, α-ketoglutaric acid

[0141] (Organic acids not corresponding to component (A)) Citric acid

[0142] (Ingredients (B)) Ingredients (B1): Ammonium lactate, Ammonium succinate Ingredients (B2): Ammonia (28% aqueous ammonia)

[0143] (Salt not equivalent to component (B)) Sodium lactate triethanolamine

[0144] (Component (C)) Purified water

[0145] (Other) Hydroxyethylcellulose ethanol

[0146] <Preliminary Experiment> A preliminary experiment was conducted as follows to compare the effects of each organic acid on inhibiting hair frizz and cuticle peeling after using a hair bleaching agent.

[0147] (Experimental Examples 1-9) The organic acids shown in Table 1 below, ethanol, hydroxyethylcellulose, and water were mixed in the following formulations to prepare hair treatment compositions.

[0148] <Composition> Organic acids shown in Table 1: Amount to reach 1 mol / L Ethanol: 10% by mass Hydroxyethylcellulose: 1% by mass Water: Remainder Total: 100% by mass

[0149] (Evaluation of hair spread suppression) Three g of the above hair treatment composition was uniformly applied to a strand of black human hair (manufactured by Beaulux Co., Ltd., 30 cm in length, 10 g in weight) and left for five minutes. After waiting, the strand was bleached using a bleaching agent containing persulfate and washed with a commercially available shampoo. After drying the strand, it was combed to obtain the evaluation strand. The hair spread suppression effect of the evaluation strands obtained in Experimental Examples 1 to 9 was evaluated visually. The results are shown in Table 1 below.

[0150] (Evaluation of cuticle peeling suppression) After performing the "Evaluation of hair spreading suppression" described above, the evaluation hair bundles obtained in Experimental Example 3 (lactic acid), Experimental Example 5 (succinic acid), and Experimental Example 9 (citric acid) were combed 100 more times. The evaluation hair bundles after 100 combing cycles were observed at a magnification of 600x using a scanning electron microscope (SEM) [Hitachi Corporation, "Hitachi Desktop Microscope Miniscope TM3030Plus"]. The results are shown in Table 1 below.

[0151]

[0152] The results of the preliminary experiments described above suggested that organic acids with lower molecular weights are superior in suppressing hair damage (such as frizz and cuticle peeling). However, since the hair treatment compositions in Experimental Examples 1 to 9 all had a pH of less than 2.2, it was necessary to raise the pH further.

[0153] (Hair Breaking Strength) A bundle of black human hair (manufactured by Beaulux Co., Ltd., 30 cm long, 10 g in weight) was bleached using a bleaching agent containing persulfates and washed with a commercially available shampoo. After drying the bundle, it was combed to obtain an untreated bundle (a bundle of bleached hair without pretreatment).

[0154] A bundle of black human hair (manufactured by Beaulux Co., Ltd., 30 cm long, 10 g in weight) was uniformly coated with 3 g of the hair treatment composition obtained in Experimental Example 3 (lactic acid), and left for 5 minutes. After waiting, the bundle was bleached using a bleaching agent containing persulfate and washed with a commercially available shampoo. After drying the bundle, it was combed to obtain the evaluation bundle (a bundle of pre-treated bleached hair).

[0155] The tensile strength of the hair was measured using the evaluation hair bundles and the untreated hair bundles. The tensile strength of the hair was measured using a tensile testing machine. As a result, the evaluation hair bundles showed an 8% higher tensile strength compared to the untreated hair bundles.

[0156] (Examples 1-19 and Comparative Examples 1-11) Hair treatment compositions were prepared by blending the ingredients shown in Tables 2-6 below. The amounts in the tables (amounts in 100% by mass of the hair treatment composition) are shown as the amount of pure components (unit: mass%). That is, the amount of ammonia in the table is not the amount of 28% aqueous ammonia, but the amount in terms of ammonia structure. In addition, in the table, the amounts of ammonium lactate and ammonium succinate, which are components (B1), are also shown in parentheses in terms of the amount of these components in terms of ammonia structure.

[0157] (Evaluation) The obtained hair treatment compositions were evaluated as follows. The evaluation results are shown in the table below. The evaluation was conducted by three expert evaluators.

[0158] (i) Preparation of hair bundles for controlling hair frizz: Black human hair bundles (manufactured by Beaulux Co., Ltd., 30 cm long, 10 g in weight) were bleached using a bleaching agent containing persulfates and washed with commercially available shampoo. After drying the hair bundles, they were combed to create the reference hair bundles (hair bundles of bleached hair without pretreatment).

[0159] Preparation of evaluation hair bundles: As a pretreatment, 3 g of the obtained hair treatment composition was uniformly applied to black human hair bundles (manufactured by Beaulux Co., Ltd., 30 cm in length, 10 g in weight) and left for 5 minutes. After waiting, the hair bundles were bleached using a bleaching agent containing persulfates and washed with a commercially available shampoo. After drying the hair bundles, they were combed to obtain evaluation hair bundles (hair bundles of bleached hair with pretreatment).

[0160] Using the above-mentioned reference hair bundle as a baseline, the hair spread suppression effect of the above-mentioned evaluation hair bundle was visually observed and evaluated according to the following criteria.

[0161] <Evaluation Criteria for Hair Spread Control> ○○ (Excellent): Compared to the standard hair bundle, hair spread is significantly suppressed (the ends are neat, there is no bulging in the middle of the bundle, and the entire bundle is neat). ○ (Good): Compared to the standard hair bundle, hair spread is clearly suppressed (the ends are neat, but there is bulging in the middle of the bundle). × (Poor): Compared to the standard hair bundle, hair spread is not suppressed (the ends are spread).

[0162] The composition and results are shown in Tables 2 to 6 below.

[0163]

[0164]

[0165]

[0166]

[0167]

[0168] The following can be seen from a comparison between Examples 1-19 and Comparative Examples 1-11.

[0169] When using the hair treatment compositions of Comparative Examples 1 to 4, which have a low pH, the hair frizz suppression effect is present. However, when the pH is increased using conventional alkaline agents (sodium lactate and triethanolamine), the hair frizz suppression effect decreases (Comparative Examples 10 and 11). In contrast, when using the hair treatment composition of the present invention, it is possible to maintain a relatively high pH while enhancing the hair frizz suppression effect (Examples 1 to 19).

[0170] (ii) Preparation of hair bundles for controlling hair spread: Black human hair bundles (manufactured by Beaulux Co., Ltd., 30 cm long, 10 g in weight) were bleached using a persulfate-free bleaching agent and washed with commercially available shampoo. The hair bundles were then dried. The above process from bleaching to drying the hair bundles was repeated a total of four times. Next, the hair bundles were colored using a hair coloring agent (a two-part oxidative hair dye for light gray hair) and washed with commercially available shampoo. After drying the hair bundles, they were combed to create the reference hair bundles (hair bundles of colored hair without pretreatment).

[0171] Preparation of evaluation hair bundles: As a pretreatment, 3 g of the hair treatment composition obtained in Example 1 was uniformly applied to a black human hair bundle (manufactured by Beaulux Co., Ltd., 30 cm in length, 10 g in weight) and left for 5 minutes. After leaving it, the hair bundle was bleached using a bleaching agent that does not contain persulfates and washed with a commercially available shampoo. Then the hair bundle was dried. The above process from pretreatment to drying the hair bundle was repeated a total of four times. Next, the above pretreatment was performed again. Then the hair bundle was hair colored using a hair coloring agent and washed with a commercially available shampoo. After drying the hair bundle, it was combed to obtain evaluation hair bundles (hair bundles of pretreated colored hair).

[0172] The hair spread suppression effect of the evaluation hair bundle was visually observed using the reference hair bundle described above as a baseline. As a result, the evaluation hair bundle showed significantly less hair spread compared to the reference hair bundle (the ends of the hair were neatly bundled, no bulging was observed in the middle of the bundle, and the entire bundle was neatly bundled).

[0173] (Examples 20-44) Hair treatment compositions were prepared by blending the ingredients shown in Tables 7-11 below. The amounts of each ingredient in the table (amount in 100% by mass of the hair treatment composition) are shown as the amount of pure ingredients (unit: mass%). That is, the amount of ammonia in the table is not the amount of 28% aqueous ammonia, but the amount in terms of ammonia equivalent.

[0174] (Evaluation) The obtained hair treatment compositions were evaluated as follows. The evaluation results are shown in the table below. The evaluation was conducted by three expert evaluators.

[0175] (1) Suppression of hair spreading The effect of suppressing hair spreading was evaluated in the same manner as the evaluation method for "(i) Suppression of hair spreading" described above. That is, it was evaluated as follows.

[0176] Preparation of reference hair bundles: Black human hair bundles (manufactured by Beaulux Co., Ltd., 30 cm long, 10 g in weight) were bleached using a bleaching agent containing persulfates and then washed with commercially available shampoo. After drying the hair bundles, they were combed to create the reference hair bundles (hair bundles of bleached hair without pretreatment).

[0177] Preparation of evaluation hair bundles: As a pretreatment, 3 g of the obtained hair treatment composition was uniformly applied to black human hair bundles (manufactured by Beaulux Co., Ltd., 30 cm in length, 10 g in weight) and left for 5 minutes. After waiting, the hair bundles were bleached using a bleaching agent containing persulfates and washed with a commercially available shampoo. After drying the hair bundles, they were combed to obtain evaluation hair bundles (hair bundles of bleached hair with pretreatment).

[0178] Using the above-mentioned reference hair bundle as a baseline, the hair spread suppression effect of the above-mentioned evaluation hair bundle was visually observed and evaluated according to the following criteria.

[0179] <Evaluation Criteria for Hair Spread Control> ○○ (Excellent): Compared to the standard hair bundle, hair spread is significantly suppressed (the ends are neat, there is no bulging in the middle of the bundle, and the entire bundle is neat). ○ (Good): Compared to the standard hair bundle, hair spread is clearly suppressed (the ends are neat, but there is bulging in the middle of the bundle). × (Poor): Compared to the standard hair bundle, hair spread is not suppressed (the ends are spread).

[0180] (2) Amount of hair breakage when combing The evaluation hair bundle prepared in "(1) Suppression of hair spreading" above was combed 100 times. The weight of the hair bundle was measured before and after combing, and the amount of hair breakage was calculated using the following formula. The amount of hair breakage when combing was evaluated according to the following criteria. When the same evaluation was performed using the standard hair bundle prepared in "(1) Suppression of hair spreading" above, the result for "Amount of hair breakage when combing" was "C".

[0181] Amount of broken hair (g) = Weight of hair bundle before combing (g) - Weight of hair bundle after combing (g)

[0182] <Evaluation criteria for the amount of hair breakage that occurs when combing> A: Amount of hair breakage is less than 0.05g B: Amount of hair breakage is 0.05g or more but less than 0.15g C: Amount of hair breakage is 0.15g or more but less than 0.30g D: Amount of hair breakage is 0.30g or more

[0183] (3) Decolorizing power The standard hair bundles and evaluation hair bundles prepared in "(1) Suppression of hair spreading" above were prepared. The degree of decolorization of these hair bundles was visually compared (separated comparison and adjacent comparison). Decolorizing power was evaluated according to the following criteria.

[0184] <Evaluation Criteria for Bleaching Power> A: The degree of bleaching of the evaluation hair strand is clearly improved compared to the degree of bleaching of the standard hair strand (the improvement is clearly visible even in a distanced comparison). B: The degree of bleaching of the evaluation hair strand is the same as the degree of bleaching of the standard hair strand (they are the same even in an adjacent comparison). C: The degree of bleaching of the evaluation hair strand is slightly lower than the degree of bleaching of the standard hair strand (not noticeable in a distanced comparison, but noticeable in an adjacent comparison). D: The degree of bleaching of the evaluation hair strand is clearly lower than the degree of bleaching of the standard hair strand (the decrease is clearly visible even in a distanced comparison).

[0185] The composition and results are shown in Tables 7 to 11 below.

[0186]

[0187]

[0188]

[0189]

[0190]

[0191] The following are examples of formulations for the hair treatment composition of the present invention.

[0192] (Formulation Example 1) Creamy Pretreatment Agent: Lactic Acid 4.5% by mass, Ammonium Lactate 5.4% by mass, Stearyl Alcohol 5.0% by mass, Behentrimonium Chloride 3.0% by mass, Polyoxyethylene Cetyl Ether 0.5% by mass, Propylene Glycol 0.2% by mass, Dimethicone 6.0% by mass, Amodimethicone 1.0% by mass, Phenoxyethanol 1.0% by mass, Fragrance 0.1% by mass, Purified Water, Total Residue 100% by mass

[0193] (Formulation Example 2) Gel-type pretreatment agent: Lactic acid 4.5% by mass, Glycolic acid 3.8% by mass, 28% aqueous ammonia 5.0% by mass, Hydroxyethylcellulose 1.0% by mass, Ethanol 10.0% by mass, Fragrance 0.1% by mass, Purified water, Total remainder 100% by mass

[0194] (Formulation Example 3) Creamy Pretreatment Agent: Lactic Acid 4.5% by mass, Acetic Acid 3.0% by mass, 28% Ammonia Water 7.1% by mass, Stearyl Alcohol 5.0% by mass, Behentrimonium Chloride 3.0% by mass, Polyoxyethylene Cetyl Ether 0.5% by mass, Propylene Glycol 0.2% by mass, Dimethicone 6.0% by mass, Amodimethicone 1.0% by mass, Phenoxyethanol 1.0% by mass, Fragrance 0.1% by mass, Purified Water, Total Residue 100% by mass

[0195] (Formulation Example 4) Gel-type pretreatment agent: Lactic acid 4.5% by mass, Acetic acid 3.0% by mass, 28% aqueous ammonia 7.1% by mass, Hydroxyethylcellulose 1.0% by mass, Ethanol 10.0% by mass, Propylene glycol 10.0% by mass, Fragrance 0.1% by mass, Purified water, Total remainder 100% by mass

Claims

1. A hair treatment composition used by applying it to hair before applying an oxidative hair dye or hair bleaching agent, comprising the following component A and the following component B, wherein the content of component A is 1.0% by mass or more and 15.0% by mass or less, and the pH is 2.2 or more and 4.7 or less. Component A: Organic acid with a molecular weight of 190 or less Component B: Component B1 and / or Component B2 below Component B1: Ammonium salt of an organic acid, wherein the molecular weight of the organic acid is 190 or less Component B2: Ammonia 2. The hair treatment composition according to claim 1, wherein component A comprises component A1 as follows: Component A1: an organic acid selected from the group consisting of acetic acid, lactic acid, glycolic acid, propionic acid, succinic acid, and levulinic acid.

3. The hair treatment composition according to claim 1 or 2, wherein component B1 comprises the following component B11: Component B11: an ammonium salt of an organic acid selected from the group consisting of ammonium acetate, ammonium lactate, ammonium glycolate, ammonium propionate, ammonium succinate, and ammonium levulinate.

4. The hair treatment composition according to claim 1 or 2, wherein component A comprises the following components A11 and A12. Component A11: Lactic acid and / or glycolic acid Component A12: Acetic acid and / or propionic acid 5. The hair treatment composition according to claim 1 or 2, wherein after applying the hair treatment composition to the hair, an oxidative hair dye or hair bleaching agent is applied to the hair without washing off the hair treatment composition.

6. The hair treatment composition according to claim 1 or 2, wherein the content of component B on an ammonia structure basis is 0.01% by mass or more and 8.0% by mass or less.

7. A method for producing a hair treatment composition, wherein the hair treatment composition is used by applying it to hair before applying an oxidative hair dye or a hair bleaching agent, the pH of the hair treatment composition is 2.2 or higher and 4.7 or lower, and the method comprises a mixing step of mixing the following component A and the following component B such that the amount of the following component A is 1.0% or higher and 15.0% or lower based on 100% by mass of the resulting hair treatment composition. Component A: Organic acid with a molecular weight of 190 or less Component B: Component B1 and / or Component B2 below Component B1: Ammonium salt of an organic acid, wherein the molecular weight of the organic acid is 190 or less Component B2: Ammonia 8. A method for producing the hair treatment composition according to claim 7, wherein component A comprises the following component A1. Component A1: An organic acid selected from the group consisting of acetic acid, lactic acid, glycolic acid, propionic acid, succinic acid, and levulinic acid.

9. A method for producing the hair treatment composition according to claim 7 or 8, wherein the component B1 comprises the component B11 described below. Component B11: Ammonium salt of an organic acid selected from the group consisting of ammonium acetate, ammonium lactate, ammonium glycolate, ammonium propionate, ammonium succinate, and ammonium levulinate.

10. A method for producing the hair treatment composition according to claim 7 or 8, wherein component A comprises the following component A11 and the following component A12. Component A11: Lactic acid and / or glycolic acid Component A12: Acetic acid and / or propionic acid 11. The method for producing a hair treatment composition according to claim 7 or 8, wherein in the mixing step, component A and component B are mixed such that the amount of component B, in terms of ammonia structure, is 0.01% by mass or more and 8.0% by mass or less with respect to 100% by mass of the resulting hair treatment composition.

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