JP2023171308A - Fiber-treating agent - Google Patents

Abstract

To provide a fiber-treating agent that improves water resistance and heat resistance in both dry and wet conditions, which are points at issue in naturally derived fibers, imparts thermal shape memory, and improves elasticity (tenacity) and surface feel.SOLUTION: A fiber-treating agent is a single agent-type fiber-treating agent formed of a single composition or a multi-agent-type fiber-treating agent formed of multiple compositions, and contains components (A)-(C) in the total compositional makeup. (A): An aromatic compound having at least one vinyl group or vinylidene group, and a coordinating functional group. (B): A radical initiator. (C): Water.SELECTED DRAWING: None

Description

The present invention relates to a fiber treatment agent for imparting water resistance, heat resistance, and thermal shape memory ability to naturally derived fibers, and preferably to naturally derived fibers used in textile products such as headdress products such as wigs and extensions. It relates to a fiber treatment agent.

Natural fibers generally have a natural texture and appearance that come from natural materials, unlike synthetic fibers. Among naturally derived fibers, regenerated protein fibers, such as regenerated collagen fibers, are obtained by solubilizing acid-soluble collagen or insoluble collagen with alkali or enzymes to make a spinning stock solution, and discharging it into a coagulation bath through a spinning nozzle to form fibers. It will be done.

However, naturally derived fibers are generally more hydrophilic than synthetic fibers, so they have a high water absorption rate, and when they contain a lot of water, they generally have low mechanical strength.Regenerated protein fibers in particular have a high mechanical strength. is extremely low. Therefore, during washing, the mechanical strength is significantly reduced due to the high water absorption rate, and the material breaks during subsequent drying, leading to a decline in its suitability as a textile product.

Furthermore, among naturally derived fibers, regenerated protein fibers have the problem of low heat resistance.For example, when heat-setting using a hair iron etc. This causes shrinkage and curling, which impairs the appearance.

Furthermore, synthetic fibers made of plastic retain their shape even after subsequent washing (they have thermal shape memory), but natural fibers retain their shape when heat-set with an iron, etc. Because it is lost after a single wash (it does not have thermal shape memory), it is inferior to conventional plastic synthetic fibers in terms of the degree of freedom in shape setting.

The above points have been factors that have hindered the spread of naturally derived fibers, particularly regenerated protein fibers, for textile products such as headdresses. In particular, the influence of water resistance, that is, a decrease in mechanical strength when wet, was significant.
On the other hand, in the field of human hair fibers, which are naturally derived fibers, there is a method in which a specific aldehyde derivative and a phenol compound are applied to human hair fibers, which do not originally have thermal shape memory ability, in order to newly impart thermal shape memory ability. is known (Patent Document 1).

Japanese Patent Application Publication No. 2019-143281

However, in the production of textile products such as headdress products, fibers are sometimes stretched strongly, and the technique described in Patent Document 1 sometimes does not provide sufficient stretchability (tenacity) of the fibers after treatment. Therefore, in order to prevent breakage during elongation, there has been a demand for increasing the elasticity of the treated fibers.

Therefore, the present invention relates to a fiber treatment agent that improves the water resistance and heat resistance, which are problems in naturally derived fibers, and imparts thermal shape memory ability, as well as improves elasticity (tenacity) and surface feel.

As a result of intensive research, the present inventors have discovered that by treating naturally-derived fibers with a composition containing an aromatic compound having a vinyl group or a vinylidene group and a coordinating functional group, and a radical initiator. The aromatic compound that penetrates into the fiber polymerizes and its coordinating functional groups strongly coordinate with the metals (mainly polyvalent metals) in the naturally derived fiber, increasing the strength and heat resistance of the fiber in water. It has been found that leakage of the aromatic compound or its polymer from the fibers is also prevented while improving the performance. As a result, naturally-derived fibers have improved water resistance and heat resistance in both dry and wet conditions, and are not only able to be shaped by heat-setting, but also surprisingly have improved elasticity (tenacity) of naturally-derived fibers. The present invention has been completed based on the discovery that the hair's hair texture is improved compared to before treatment, and can be raised to a level close to that of human hair.

The present invention relates to a single-component fiber treatment agent consisting of a single composition or a multi-component fiber treatment agent consisting of a plurality of compositions, which includes the following components (A) to The present invention provides a fiber treatment agent containing (C).
(A): Aromatic compound having one or more vinyl groups or vinylidene groups and a coordinating functional group
(B): Radical initiator
(C)：Water

Furthermore, the present invention provides a fiber treatment agent kit including a composition containing the following components (A) and (C), and a composition containing the following components (B) and (C). .
(A): Aromatic compound having one or more vinyl groups or vinylidene groups and a coordinating functional group
(B): Radical initiator
(C)：Water

According to the present invention, it is possible to improve the water resistance and heat resistance in both dry and wet conditions of naturally-derived fibers, impart thermal shape memory ability, and improve elasticity (tenacity) and surface A fiber treatment agent that can improve feel can be provided.

[Single-drug and multi-drug types]
The fiber treatment agent of the present invention includes a one-component fiber treatment agent consisting of a single composition, a two-component type fiber treatment agent, and a multi-component fiber treatment agent consisting of multiple compositions such as a two-component type. Any form of pharmaceutical fiber treatment agent is included. Note that the one-component fiber treatment agent includes one in which a plurality of compositions are mixed before use and used as a single composition.
In the present invention, the content in a fiber treatment agent refers to the content in a single composition used in the case of a single-component fiber treatment agent, and refers to the content in a single composition used in the case of a multi-component fiber treatment agent. This refers to the content in each processing agent.

[Fibers to be treated in the present invention]
The fibers to be treated with the fiber treatment agent of the present invention are preferably metal-containing fibers, preferably metal-containing naturally-derived fibers or metal-containing synthetic fibers, and in particular, naturally-derived fibers containing metals. preferable. Naturally derived fibers are fibers collected from natural animals and plants, or polymers and oligomers such as proteins and polysaccharides derived from keratin, collagen, casein, soybeans, peanuts, corn, silk waste, silk proteins (such as silk fibroin), etc. Fibers that are artificially produced as raw materials. Among these, fibers artificially produced using polymers and oligomers such as proteins and polysaccharides derived from keratin, collagen, casein, soybeans, peanuts, corn, silk waste, silk proteins (for example, silk fibroin), etc. are preferred. Regenerated protein fibers made from proteins derived from , keratin, collagen, casein, soybean protein, peanut protein, corn protein, silk protein (for example, silk fibroin) are more preferable, and regenerated collagen fibers made from collagen and silk fibroin are more preferable. Regenerated protein fibers such as regenerated silk fibers used as raw materials are more preferable, and regenerated collagen fibers are even more preferable.

Regenerated collagen fibers can be produced using known techniques, and their composition does not have to be 100% collagen, but may contain natural or synthetic polymers and additives for quality improvement. Furthermore, the regenerated collagen fibers may be post-processed. The preferred form of the regenerated collagen fibers is filaments. Filament is generally taken out from a bobbin wound or boxed state. Furthermore, the filaments that come out of the drying process can also be used directly in the process of producing regenerated collagen fibers.

The metal-containing synthetic fiber may be a metal-treated synthetic fiber. Naturally derived fibers containing metals include those that originally contain metals, such as fibers collected from natural animals and plants.In this case, there is no need to add metals, but for example, if Fibers treated with metal salts may also be used, such as the fibers treated with aluminum salts for water resistance as described in Japanese Patent Publication No. 2003-027318.

[Component (A): aromatic compound having a vinyl group or vinylidene group and a coordinating functional group]
Component (A) is an aromatic compound having one or more vinyl or vinylidene groups and a coordinating functional group. The coordinating functional group in component (A) is preferably one containing Pearson's hard base. Pearson's Hard Base refers to a Lewis base that is classified as a hard base in the concept of HSAB (Hard and Soft Acids and Bases) introduced by RG Pearson in the 1960s, and is classified as a hard acid. It is said that it easily reacts with Lewis acids.

As the hard base contained in the coordinating functional group in the aromatic compound of component (A), Application of the Principle of Hard and Soft Acids and Bases to Organic Chemistry, Ralph G. Pearson and Jon. Songstad, J. Am. Examples include functional groups corresponding to Hard Base described in Chem. Soc. 1967, 89, 8, 1827-1836, such as COO ⁻ , O ⁻ , COOH, OH, NH ₂ and the like. Among these, COO ^- , O ^- , COOH, and OH are preferred, and from the viewpoint of reducing fiber coloring and improving fixing properties after fiber treatment (suppressing elution during washing), COO ^- , O -, COOH, and OH are preferred. COOH is more preferred. The coordinating functional group in component (A) is preferably a functional group containing a carboxy group or a group obtained by removing one hydrogen atom from the benzene ring of catechol (1,2-dihydroxybenzene).

Hereinafter, the aromatic compound of component (A) will be described as follows: (A-1) When the coordinating functional group contains COOH, COO ^- or a salt of COOH, (A-2) When the coordinating functional group contains OH, O ^- Or, cases containing OH salts will be exemplified separately.

(A-1) When the coordinating functional group contains COOH, COO- or COOH salt
(A-1) includes (A-1-a) an aromatic compound having a vinyl group or vinylidene group as part of the styrene skeleton, and (A-1-b) an acryloyl group or methacryloyl group in which a vinyl group or vinylidene group is Examples include aromatic compounds having as part of the group. Furthermore, examples of the case where component (A-1) is a salt include alkali metal salts such as sodium salts and potassium salts.

(A-1-a) When the coordinating functional group contains COOH, COO ^- or a salt of COOH, and the vinyl group or vinylidene group is part of the styrene skeleton
Examples of the aromatic compound (A-1-a) include compounds represented by the following general formula (1).

[In formula (1), R ¹ represents a hydrogen atom or a methyl group, and A ¹ to A ⁵ each independently represent a hydrogen atom, a carboxy group, a group represented by the general formula (2), an acetyl group, a halogen Atom, or a linear or branched alkyl group, alkenyl group, alkoxy group, or alkenyloxy group having 1 to 6 carbon atoms. In formula (2), R ² is a linear or branched saturated or unsaturated divalent hydrocarbon group having 1 to 6 carbon atoms, a divalent hydrocarbon oxy group, an o-phenylene group, an m-phenylene group, p -Represents a phenylene group, benzylidene group or phenyl C ₂ -C ₄ alkylene group. However, A ¹ to A ⁵ contain at least one carboxy group or a group represented by general formula (2). ]

Among (A-1-a), specific examples of aromatic compounds in which A ¹ to A ⁵ contain at least one carboxy group include 2-vinylbenzoic acid, 3-vinylbenzoic acid, and 4-vinylbenzoic acid. Examples include acids and mixtures of two or three selected from these, but a mixture of three is preferred from the viewpoint of ease of availability and good surface feel of the fibers after treatment. On the other hand, 4-vinylbenzoic acid is preferred from the viewpoint of imparting water resistance.

Among (A-1-a), specific examples of aromatic compounds in which A ¹ to A ⁵ contain at least one group represented by general formula (2) include 4-oxo-4-(( Examples include 4-vinylbenzyl)oxy)butanoic acid and 2-(((4-vinylbenzyl)oxy)carbonyl)benzoic acid.

(A-1-b) When the coordinating functional group contains COOH, COO ^- or a salt of COOH, and the vinyl group or vinylidene group is part of the acryloyl group or methacryloyl group
Examples of the aromatic compound (A-1-b) include compounds represented by the following general formula (3).

[In formula (3), R ³ represents a hydrogen atom or a methyl group, and B ¹ to B ⁴ each independently represent a hydrogen atom, a carboxy group, an acetyl group, a halogen atom, or a straight chain having 1 to 6 carbon atoms. or a branched alkyl group, alkenyl group, alkoxy group or alkenyloxy group, Ph represents a phenylene group, n represents an integer of 0 to 2, and m represents 0 or 1. ]

Specific examples of aromatic compounds represented by general formula (3) include 2-((2-(acryloyloxy)ethoxy)carbonyl)benzoic acid, 2-((2-(methacryloyloxy)ethoxy)carbonyl)benzoic acid, acid, 2-(4-(2-(2-(acryloyloxy)ethoxy)ethoxy)benzoyl)benzoic acid.

(A-2) When the coordinating functional group contains OH, O ^- or OH salt
Examples of (A-2) include compounds represented by the following general formula (4).

[In formula (4), R ⁴ represents a hydrogen atom or a methyl group, and E ¹ to E ⁵ each independently represent a hydrogen atom, a hydroxy group, a group represented by the general formula (5), an acetyl group, a halogen atom, or a linear or branched alkyl group, alkenyl group, alkoxy group, or alkenyloxy group having 1 to 6 carbon atoms, and G ¹ to G ⁵ each independently represent a hydrogen atom, a hydroxy group, an acetyl group, It represents a halogen atom, or a linear or branched alkyl group, alkenyl group, alkoxy group, or alkenyloxy group having 1 to 6 carbon atoms. However, E ¹ to E ⁵ contain at least one group represented by general formula (5). ]

A specific example of the aromatic compound represented by the general formula (4) is 4-vinylbenzyl 3,4,5-trihydroxybenzoate.

As component (A), a component corresponding to (A-1) is more preferable from the viewpoint of reducing coloring of the fibers and improving fixing properties after fiber treatment (suppressing elution during washing). .

Component (A) can be used alone or in combination of two or more. The content of component (A) in the fiber treatment agent of the present invention varies depending on the pH range of the fiber treatment agent, but the following range is preferable. Here, when component (A) is a salt, the content of component (A) refers to the content of the corresponding non-dissociated form. Non-dissociated type refers to the state in which the counter ion is replaced with hydrogen in the case of an acid, for example, the acid form COOH in the case of a COO-salt, the state in which the proton is removed in the case of a base, and the state in the amine state in the case of an ammonium salt. Refers to the content. In addition, when the fiber treatment agent is a multi-component type, the "pH of the fiber treatment agent" herein refers to the pH of the treatment agent containing component (A). When there are multiple processing agents containing component (A), the preferred content range is determined depending on the pH of each processing agent. As mentioned above, those that are used as a single composition by mixing multiple compositions before use are included in single-component fiber treatment agents, and "pH of the fiber treatment agent" refers to the pH after mixing. refers to

When the pH of the fiber treatment agent is 2.0 or more and less than 6.5, the content of component (A) in the fiber treatment agent is such that the naturally derived fiber after treatment has high shape sustainability, water resistance, elasticity (tenacity, In other words, from the viewpoint of imparting high elongation at break when the fiber is stretched) and heat resistance, the salt is preferably 0.1% by mass or more, more preferably 0.2% by mass or more, and still more preferably 0.5% by mass or more as a non-dissociated salt. , even more preferably 1.0% by mass or more, and from the viewpoint of improving the feel of the fiber surface, preferably 40% by mass or less, more preferably 30% by mass or less, still more preferably 25% by mass or less, and even more preferably is 20% by mass or less, even more preferably 15% by mass or less.
That is, when the pH of the fiber treatment agent is 2.0 or more and less than 6.5, the content of component (A) in the fiber treatment agent of the present invention is preferably from 0.1 to 0.1 as a non-dissociated salt in the case of a salt. 40% by weight, more preferably 0.2-30% by weight, even more preferably 0.5-25% by weight, even more preferably 1.0-20% by weight, even more preferably 1.0-15% by weight.

When the pH of the fiber treatment agent is 6.5 or higher and 11.0 or lower, the content of component (A) in the fiber treatment agent is such that the naturally derived fibers after treatment have high shape sustainability, water resistance, elasticity (tenacity, In other words, from the viewpoint of imparting high breaking elongation (i.e., high elongation at break when the fiber is stretched) and heat resistance, in the case of a salt, the non-dissociated type is preferably 1.0% by mass or more, more preferably 2.0% by mass or more, and even more preferably 5.0% by mass or more. , even more preferably 10% by mass or more, and from the viewpoint of improving the feel of the fiber surface, preferably 90% by mass or less, more preferably 80% by mass or less, still more preferably 70% by mass or less, and even more preferably is 60% by mass or less.
That is, when the pH of the fiber treatment agent is 6.5 or more and 11.0 or less, the content of component (A) in the fiber treatment agent of the present invention is preferably from 1.0 to 1.0 as a non-dissociated salt in the case of a salt. The content is 90% by weight, more preferably 2.0 to 80% by weight, even more preferably 5.0 to 70% by weight, even more preferably 10 to 60% by weight.

[Component (B): Radical initiator]
Component (B) is a radical initiator for polymerizing component (A). Component (B) may be contained in the same composition as component (A), but if the fiber treatment agent used is a multi-drug type, for example, a two-drug type, the composition containing component (A) (first part ) may be contained in a separate composition (second agent). Component (B) includes peroxide initiators, azo initiators, and the like. Moreover, a combination of an oxidizing agent and a reducing agent can also be used as a redox initiator.

Peroxide initiators include sodium persulfate, potassium persulfate, ammonium persulfate, t-butyl hydroperoxide, t-amyl hydroperoxide, p-diisopropylbenzene hydroperoxide, cumene hydroperoxide, pinane hydroperoxide, p-menthane hydroperoxide. Peroxide, 1,1,3,3-tetramethylbutyl hydroperoxide, benzoyl peroxide, t-butyl perbenzoate, diisopropyl peroxydicarbonate, di-n-propyl peroxydicarbonate, di(2-ethoxyethyl) Examples include peroxydicarbonate, t-butyl peroxineodecanoate, t-butyl peroxybivalate, (3,5,5-trimethylhexanoyl) peroxide, dipropionyl peroxide, diacetyl peroxide, and the like.

Examples of azo initiators include 2,2'-azobisisobutyronitrile, 2,2'-azobis(2-methylbutyronitrile), 1,1'-azobis(cyclohexane-1-carbonitrile), 2, 2'-azobis(2,4-dimethylvaleronitrile), 2,2'-azobis(2,4-dimethyl-4-methoxyvaleronitrile), dimethyl 2,2'-azobis(2-methylpropionate), 2,2'-azobis(2-hydroxymethylpropionitrile), 2,2'-azobis[2-methyl-N-(2-hydroxyethyl)propionamide], 4,4'-azobis(4-cyanokichi) grass acid), 2,2'-azobis[2-(2-imidazolin-2-yl)propane], 2,2'-azobis[N-(2-carboxyethyl)-2-methylpropionamidine], 2,2 Examples include '-azobis(2-methylpropionamidine) dihydrochloride, 2,2'-azobis[2-(2-imidazolin-2-yl)propane] dihydrochloride, and the like.

Examples of the oxidizing agent used in the redox initiator include hydrogen peroxide, sodium hypochlorite, potassium hypochlorite, oxygen, ozone, and the like, in addition to the compounds listed as the above-mentioned peroxide initiator. In addition, reducing agents used in redox initiators include sodium sulfite, potassium sulfite, sodium hydrogen sulfite, potassium hydrogen sulfite, sodium pyrosulfite, potassium pyrosulfite, iron (II) ion, chromium ion, ascorbic acid, formaldehyde sulfonate. Examples include xylate, tetramethylene diamine, sodium hydroxymethylsulfinate, and the like.

The hydrophilic fiber treatment agent for naturally derived fibers is preferably an aqueous solution from the viewpoint of promoting the penetration of compounds in the solution into the fibers, and therefore, it is also recommended to use water-soluble as a radical initiator to be added to the fiber treatment agent. Preferred are radical initiators. Water-soluble azo initiators include 2,2'-azobis[2-methyl-N-(2-hydroxyethyl)propionamide], 4,4'-azobis(4-cyanovaleric acid), 2,2' -Azobis[2-(2-imidazolin-2-yl)propane], 2,2'-azobis[N-(2-carboxyethyl)-2-methylpropionamidine], 2,2'-azobis(2-methyl Preferred are propionamidine) dihydrochloride, 2,2'-azobis[2-(2-imidazolin-2-yl)propane] dihydrochloride, and the like.

Here, a water-soluble radical initiator is defined as a water-soluble radical initiator, in accordance with JIS K8001 general rules for reagent test methods. In the terms indicating the degree of dissolution defined by the volume of water (mL) required for dissolution within minutes, preferably "slightly soluble" to "extremely soluble", more preferably "slightly soluble" to "slightly soluble" Radical initiation corresponding to "extremely soluble", more preferably "slightly soluble" to "extremely soluble", even more preferably "easily soluble" to "extremely soluble", even more preferably "extremely soluble" means a drug.

<Amount of water required to dissolve 1 g of radical initiator>
Extremely soluble: less than 1 mL Easily soluble: 1 mL or more and less than 10 mL Slightly soluble: 10 mL or more and less than 30 mL Slightly soluble: 30 mL or more and less than 100 mL Hardly soluble: 100 mL or more and less than 1000 mL Extremely soluble: 1000 mL or more and less than 10,000 mL Barely soluble: 10,000 mL or more

Furthermore, as a treatment agent for naturally-derived fibers with low heat resistance, it is more preferable to use a radical initiator with a low 10-hour half-life temperature that can efficiently cleave and function as a radical initiator even at low treatment temperatures. Among them, 2,2'-azobis[2-(2-imidazolin-2-yl)propane] (10-hour half-life temperature: 61°C), 2,2'-azobis[N-(2-carboxyethyl)- 2-Methylpropionamidine] (10-hour half-life temperature: 57℃), 2,2'-azobis(2-methylpropionamidine) dihydrochloride (10-hour half-life temperature: 56℃), 2,2'-azobis [2-(2-imidazolin-2-yl)propane] dihydrochloride (10 hour half-life temperature: 44°C) is preferred.

Here, the 10-hour half-life temperature of the radical initiator refers to the temperature at which 50% of the radical initiator decomposes after 10 hours. The 10-hour half-life temperature of the radical initiator is preferably 80°C or lower, more preferably 70°C or lower, and even more preferably The temperature is 60°C or lower, even more preferably 50°C or lower, and from the viewpoint of not exhibiting excessive reactivity during storage at room temperature and is advantageous for storage and transportation, it is preferably 0°C or higher, more preferably 10°C or higher, and Preferably it is 20°C or higher.

Component (B) can be used alone or in combination of two or more. The content of component (B) in the fiber treatment agent of the present invention is determined so that the reaction progresses efficiently and the naturally-derived fibers after treatment have high shape sustainability, water resistance, and elasticity (tenacity, i.e., when the fiber is pulled). From the viewpoint of imparting high elongation at break) and heat resistance, in the case of salts and complexes, it is converted to the non-dissociated form of the compound that is the main component of the reaction. For example, in the case of peroxide initiators, peroxide, azo initiator In the case of a redox initiator, it is an azo compound, and in the case of a redox initiator, it is converted into the non-dissociated form of an oxidizing agent and a reducing agent, preferably 0.001% by mass or more, more preferably 0.01% by mass or more, even more preferably 0.1% by mass or more, Still more preferably 0.5% by mass or more, and from the viewpoint of preventing the molecular weight of the polymer produced from becoming too small due to excessive concentration, preferably 80% by mass or less, more preferably 60% by mass or less, even more preferably It is 40% by mass or less, even more preferably 20% by mass or less. Note that when a redox initiator is used as component (B), the content of component (B) indicates the total amount of non-dissociable compounds of the oxidizing agent and the reducing agent.

The mass ratio (B)/(A) of component (B) to component (A) is such that the reaction progresses efficiently and the naturally-derived fibers after treatment have high shape sustainability, water resistance, elasticity (tenacity, In other words, from the viewpoint of imparting high elongation at break when the fiber is stretched) and heat resistance, it is preferably 0.001 or more, more preferably 0.01 or more, and preferably 200 or less, more preferably 50 or less. In addition, when it is a multi-component fiber treatment agent and component (A) and component (B) are contained in different treatment agents, the mass ratio (B)/ It is sufficient if (A) is within the above range.

[Component (C): Water]
The fiber treatment agent of the present invention uses water as a medium. The content of component (C) in the fiber treatment agent of the present invention is preferably 10% by mass or more, more preferably 20% by mass or more, still more preferably 30% by mass or more, and even more preferably 40% by mass or more. , also preferably 98% by mass or less, more preferably 97% by mass or less, even more preferably 96% by mass or less, even more preferably 95% by mass or less, even more preferably 90% by mass or less, even more preferably 85% by mass. It is as follows.
That is, the content of component (C) in the fiber treatment agent of the present invention is preferably 10 to 98% by mass, more preferably 20 to 97% by mass, even more preferably 30 to 96% by mass, and even more preferably 40% by mass. ~95% by weight, even more preferably 40-90% by weight, even more preferably 40-85% by weight.

[Cationic surfactant]
The fiber treatment agent of the present invention may contain a cationic surfactant within a range that does not impair the effects of the present invention. The cationic surfactant is preferably a mono-long chain alkyl quaternary ammonium salt having one alkyl group having 8 to 24 carbon atoms and three alkyl groups having 1 to 4 carbon atoms.

Preferably, the at least one mono-long chain alkyl quaternary ammonium surfactant is selected from compounds represented by the following general formula (6).

[In the formula, R ⁵ is a saturated or unsaturated linear or branched alkyl group having 8 to 22 carbon atoms, R ⁹ -CO-NH-(CH ₂ ) _p - or R ⁹ -CO-O-(CH ₂ ) _p - (R ⁹ represents a saturated or unsaturated linear or branched alkyl chain having 7 to 21 carbon atoms, p represents an integer of 1 to 4), R ⁶ , R ⁷ and R ⁸ independently represents an alkyl group having 1 to 4 carbon atoms or a hydroxylalkyl group having 1 to 4 carbon atoms, and An ^- represents a chloride ion, bromide ion, methosulfate ion or ethosulfate ion. ]

Suitable cationic surfactants include, for example, long chain quaternary ammonium compounds such as cetyltrimethylammonium chloride, myristyltrimethylammonium chloride, behentrimonium chloride, cetyltrimethylammonium bromide, stearamidopropyltrimonium chloride, These can be used alone or as a mixture.

The content of the cationic surfactant in the fiber treatment agent of the present invention is preferably 0.05% by mass or more, from the viewpoint of improving the surface feel of the naturally-derived fibers after treatment and further improving the effects of the present invention. It is more preferably 0.10% by mass or more, more preferably 10% by mass or less, and more preferably 5.0% by mass or less.

〔silicone〕
Furthermore, the fiber treatment agent of the present invention can contain silicone from the viewpoint of improving the surface feel of the naturally-derived fibers after treatment and improving the cohesion. The silicone is preferably one or more selected from dimethylpolysiloxane and amino-modified silicone.

As the dimethylpolysiloxane, any cyclic or acyclic dimethylpolysiloxane polymer can be used, examples of which include the SH200 series, BY22-019, BY22-020, BY11-026, B22-029, BY22-034, BY22. -050A, BY22-055, BY22-060, BY22-083, FZ-4188 (all from Toray Dow Corning Co., Ltd.), KF-9088, KM-900 series, MK-15H, MK-88 (all from Shin-Etsu Chemical) Kogyo Co., Ltd.).

As the amino-modified silicone, any silicone having an amino group or an ammonium group can be used. Examples include amino-modified silicone oil in which all or some of the terminal hydroxyl groups are end-capped with a methyl group, etc. Amodimethicone, which has not been stopped, is mentioned. From the viewpoint of improving the surface feel of the treated naturally-derived fibers and improving their cohesion, examples of preferred amino-modified silicones include compounds represented by the following formula.

[In the formula, R' represents a hydrogen atom, a hydroxyl group, or R ^x , R ^x represents a substituted or unsubstituted monovalent hydrocarbon group having 1 to 20 carbon atoms, and J represents R ^x , R"-(NHCH ₂ CH ₂ ) _a represents NH ₂ , ^OR represents a number of 10 or more and less than 20,000, preferably 20 or more and less than 3,000, more preferably 30 or more and less than 1,000, and even more preferably 40 or more and less than 800. ]

Specific examples of suitable commercially available amino-modified silicones include SF8452C, SS3551 (all from Dow Corning Toray Co., Ltd.), KF-8004, KF-867S, and KF-8015 (all from Shin-Etsu Chemical Co., Ltd.). Examples include amino-modified silicone oil, and amodimethicone emulsions such as SM8704C, SM8904, BY22-079, FZ-4671, and FZ4672 (all manufactured by Dow Corning Toray Co., Ltd.).

The content of silicone in the fiber treatment agent of the present invention is preferably 0.1% by mass or more, more preferably 0.2% by mass, from the viewpoint of improving the surface feel of the naturally-derived fibers after treatment and further improving the effects of the present invention. The content is at least 0.5% by mass, more preferably at least 0.5% by mass, and is preferably at most 20% by mass, more preferably at most 10% by mass, even more preferably at most 5.0% by mass.

[Cationic polymer]
Furthermore, the fiber treatment agent of the present invention may contain a cationic polymer from the viewpoint of improving the surface feel of the naturally-derived fibers after treatment.

The cationic polymer refers to a polymer having a cationic group or a group that can be ionized into a cationic group, and includes an amphoteric polymer that is cationic as a whole. That is, aqueous solutions containing an amino group or an ammonium group in the side chain of the polymer chain, or a diallyl quaternary ammonium salt as a constituent unit, such as cationized cellulose derivatives, cationic starches, cationized guar gum derivatives, diallyl quaternary Examples include polymers or copolymers of ammonium salts, quaternized polyvinylpyrrolidone derivatives, and the like. Of these, diallyl quaternary ammonium One or more selected from polymers containing salts as constitutional units, quaternized polyvinylpyrrolidone derivatives, and cationized cellulose derivatives are preferred, and selected from polymers or copolymers of diallyl quaternary ammonium salts and cationized cellulose derivatives. More preferably, one or more of these are used.

Specific examples of suitable polymers or copolymers of diallyl quaternary ammonium salts include dimethyldiallyl ammonium chloride polymers (polyquaternium-6, e.g. Marquat 100; Lubrizol Advanced Materials), dimethyl diallyl ammonium chloride/ Acrylic acid copolymers (Polyquaternium-22, e.g. Marquat 280, 295; Lubrizol Advanced Materials), dimethyldiallylammonium chloride/acrylamide copolymers (Polyquaternium-7, e.g. Marquat 550; Lubrizol Advanced Materials) Materials Co., Ltd.) etc.

Specific examples of suitable quaternized polyvinylpyrrolidone derivatives include polymers obtained by polymerizing vinylpyrrolidone copolymers and dimethylaminoethyl methacrylate (polyquaternium 11, such as Gaffcut 734, Gaffcut 755, and Gaffcut 755N (all manufactured by Ashland)). ).

Specific examples of suitable cationized cellulose include polymers in which hydroxycellulose is loaded with glycidyltrimethylammonium chloride (polyquaternium 10, such as Leogard G, Polyquaternium GP (Lion Corporation), Polymer JR-125, Polymer JR-400, Polyquaternium 10) JR-30M, LR-400, LR-30M (Amarkol), hydroxyethyl cellulose dimethyl diallylammonium chloride (polyquaternium-4, e.g. Cellcoat H-100, L-200 (Amarkol)) ) etc.

The content of the cationic polymer in the fiber treatment agent of the present invention is preferably 0.001% by mass or more, more preferably 0.01% by mass or more, still more preferably The content is 0.05% by mass or more, preferably 20% by mass or less, and more preferably 10% by mass or less.

Furthermore, the fiber treatment agent of the present invention may contain an antioxidant such as ascorbic acid; a pH adjuster such as sodium hydroxide, potassium hydroxide, phosphoric acid, or hydrochloric acid.

[pH]
The pH of the fiber treatment agent of the present invention is preferably 2.0 or more, more preferably 3.0 or more, still more preferably 3.5 or more, and even more preferably 4.0 or more, from the viewpoint of suppressing damage to naturally-derived fibers and improving durability. Further, it is preferably 11.0 or less, more preferably 10.0 or less, and even more preferably 9.0 or less. Note that the pH in the present invention is a value at 25°C.
That is, the pH of the fiber treatment agent of the present invention is preferably 2.0 to 11.0, more preferably 3.0 to 10.0, still more preferably 3.5 to 9.0, and even more preferably It is between 4.0 and 9.0.
In addition, in the case of a multi-component fiber treatment agent, the above conditions apply to the pH of each agent. However, it is preferable for the pH of each agent to be close. Specifically, the difference in pH between the agent with the highest pH and the agent with the lowest pH is preferably 3.0 or less, more preferably 2.0 or less, and even more preferably 1.0 or less. , even more preferably 0.5 or less. As mentioned above, those that are used as a single composition by mixing multiple compositions before use are included in single-component fiber treatment agents, and "pH of the fiber treatment agent" refers to the pH after mixing. refers to

[How to store fiber treatment agent]
When transporting and storing the fiber treatment agent produced as described above before applying it to fibers, or when transporting and storing raw materials before preparing the fiber treatment agent, the polymer of component (A) In order to prevent oxidative coloring, unintended reaction progress, and recrystallization during transportation, the storage temperature may be set to a cold or high temperature, or the voids in the storage container may be filled with nitrogen.

The storage temperature of the fiber treatment agent is preferably 1°C or higher, more preferably 2°C or higher, and even more preferably 5°C or higher, from the viewpoint of preventing freezing or recrystallization. From the viewpoint of preventing undesirable reaction progress, the temperature is preferably 25°C or lower, more preferably 20°C or lower, and even more preferably 15°C or lower.

In addition, the storage temperature of the fiber treatment agent is preferably 20°C or higher, more preferably 30°C or higher, and still more preferably 40°C or higher, from the viewpoint of preventing recrystallization of a highly concentrated solution. From the viewpoint of preventing undesirable reaction progress, the temperature is preferably 80°C or lower, more preferably 70°C or lower, and still more preferably 60°C or lower.

[Fiber processing method]
(Basic processing)
By treating naturally derived fibers using the fiber treatment agent of the present invention in a method including the following step (i), the water resistance and heat resistance, which are problems of naturally derived fibers, can be improved, and the thermal shape memory ability can be improved. It is possible to improve elasticity (tenacity) and surface feel.
Step (i) Step of immersing naturally derived fibers in the fiber treatment agent of the present invention

When the fiber treatment agent of the present invention is a multi-component type, the multi-component fiber treatment agent may include, for example, a two-component composition consisting of a first part containing component (A) and a second part containing component (B). Examples include formula fiber treatment agents. When such a multi-component fiber treatment agent is used, step (i) is a multi-step treatment step in which naturally-derived fibers are sequentially immersed in each agent. For example, when using the above-mentioned two-part fiber treatment agent, step (i) involves immersing the naturally-derived fibers in the first part containing component (A), and then soaking them in the second part containing component (B). A two-step treatment process in which the naturally-derived fibers are immersed in the second agent containing component (B) after being treated with the first agent; This is a two-step process in which the naturally-derived fibers are immersed after being treated with two agents.

In step (i), the naturally-derived fibers immersed in the fiber treatment agent may be dry or wet. The amount of fiber treatment agent used to soak the naturally-derived fibers is determined from the viewpoints of improving water resistance, heat resistance, and thermal shape memory ability, as well as improving elasticity (tenacity) and surface feel. The bath ratio to the mass (mass of fiber treatment agent/mass of naturally-derived fiber) is preferably 2.0 or more, more preferably 3.0 or more, even more preferably 5.0 or more, even more preferably 10 or more, and even more preferably 20. or more, and preferably 500 or less, more preferably 250 or less, and even more preferably 100 or less.
That is, from the above viewpoint, the bath ratio is preferably 2.0 to 500, more preferably 3.0 to 250, still more preferably 5.0 to 100, even more preferably 10 to 100, and even more preferably 20 to 100.

Further, in step (i), the naturally-derived fibers may be fixed in advance with a curler or the like, and then immersed in the fiber treatment agent of the present invention under heating. By doing so, it is possible to simultaneously impart a desired shape to the naturally-derived fiber in addition to thermal shape memory ability and high durability.

The immersion of the naturally-derived fibers in the fiber treatment agent in step (i) is preferably performed under heating, and this heating is performed by heating the fiber treatment agent. Note that this heating may be performed by immersing the naturally-derived fibers in a heated fiber treatment agent, but it may also be performed by immersing the naturally-derived fibers in a low-temperature fiber treatment agent and then heating. The temperature of the fiber treatment agent is preferably 20°C or higher, more preferably 20°C or higher, in order to obtain the effects of the present invention by increasing the interaction between component (A) and fiber constituent molecules in naturally derived fibers, such as protein molecules. The temperature is 35°C or higher, more preferably 45°C or higher, and preferably lower than 100°C, more preferably 80°C or lower, and even more preferably 70°C or lower in order to prevent natural fibers from being denatured and deteriorated by heat. , more preferably 60°C or lower.

The immersion time in step (i) is appropriately adjusted depending on the heating temperature, but for example, from the viewpoint of exerting the effect of improving elasticity on naturally-derived fibers, it is preferably 15 minutes or more, more preferably 30 minutes or more, and even more preferably The heating time is 1 hour or more, and in order to prevent damage to the naturally-derived fibers, the heating time is preferably 48 hours or less, more preferably 24 hours or less, and even more preferably 12 hours or less.

Step (i) is preferably performed in an environment where evaporation of water is suppressed. A specific method for suppressing moisture evaporation includes a method of covering the container of the fiber treatment agent in which the naturally-derived fibers are immersed with a film-like substance, cap, lid, etc. made of a material that does not permeate water vapor.

In the case of multi-stage treatment using a multi-component fiber treatment agent, the aforementioned bath ratio, temperature, immersion time and other conditions are applied for each stage. In addition, in the case of multi-stage processing, rinsing, drying, etc. may be performed between each stage.

After step (i), the naturally-derived fibers may or may not be rinsed, but from the viewpoint of preventing deterioration of the surface feel of the naturally-derived fibers due to excess component (A) or its polymer, rinsing is recommended. is preferable.

Through these treatments, component (A) penetrates into the naturally-derived fibers, polymerizes, and strongly coordinates with metals, such as polyvalent metals, within the fibers, thereby producing various effects.

[Processing that may be added]
In addition to the above-mentioned step (i), one or more steps selected from decolorization, dyeing, surface finishing to impart hydrophobicity/lower friction, and heat treatment to further improve fiber elasticity (tenacity) You may perform each process in addition.

At this time, the decolorization and dyeing treatments may be performed before or after the above-mentioned step (i). You can also add multiple treatments in combination; if you add both bleaching and staining, you can do either treatment first, except that bleaching must be done before staining. , another treatment can also be performed between bleaching and staining.

On the other hand, surface finishing to impart hydrophobicity and lower friction, and heat treatment to further improve fiber elasticity (tenacity), need to be carried out after the above-mentioned step (i). The processing order is not particularly limited. Furthermore, either the surface finishing for imparting hydrophobicity and low friction or the heat treatment for further improving fiber elasticity (tenacity) may be performed first.

(bleaching)
Decolorization is performed by immersing the naturally-derived fibers in a decolorizing agent composition containing an alkaline agent, an oxidizing agent, and water. The decolorizing agent composition is usually of a two-part type, the first part containing an alkaline agent and water, and the second part containing an oxidizing agent and water. The two agents are usually stored separately and mixed before soaking the natural fibers.

Suitable alkaline agents include, for example, ammonia and its salts; alkanolamines (monoethanolamine, isopropanolamine, 2-amino-2-methylpropanol, 2-aminobutanol, etc.) and their salts; alkanediamines (1,3 -propanediamine, etc.) and salts thereof; and carbonates (guanidine carbonate, sodium carbonate, potassium carbonate, sodium hydrogen carbonate, potassium hydrogen carbonate, etc.); and mixtures thereof.

The content of the alkaline agent in the decolorizing agent composition (in the case of a two-part type, a mixture of the first part and the second part) is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, and even more preferably 1.0% by mass. % or more, and preferably 15% by mass or less, more preferably 10% by mass or less, even more preferably 7.5% by mass or less.

Suitable oxidizing agents include, but are not limited to, for example, hydrogen peroxide, urea peroxide, melamine peroxide, and sodium bromate. Among these oxidizing agents, hydrogen peroxide is preferred.

The content of the oxidizing agent in the decolorizing agent composition is preferably 1% by mass or more, more preferably 2% by mass or more, and preferably 15% by mass or less, more preferably 12% by mass or less, and even more preferably It is 9% by mass or less.

When storing the first and second agents separately, the pH of the second agent at 25°C is preferably 2 or more, more preferably 2.5 or more, and preferably 6 or less, more preferably 4 or less. be. This pH can be adjusted with suitable buffers. The pH of the decolorizer composition at 25°C is preferably 6 or higher, more preferably 6.5 or higher, even more preferably 6.8 or higher, and preferably 11 or lower, more preferably 10.5 or lower, and even more preferably 10 or lower. .

(staining)
Dyeing is performed by immersing the naturally-derived fibers in a dye composition. The dye composition contains a dye and may optionally contain an alkaline agent, an acid, an oxidizing agent, and the like. Dyes include direct dyes, oxidative dyes, and combinations thereof.

The type of direct dye is not particularly limited, and any direct dye suitable for dyeing can be used. Examples of direct dyes include anionic dyes, nitro dyes, disperse dyes, cationic dyes, and dyes with an azophenol structure selected from the group consisting of HC Red 18, HC Blue 18 and HC Yellow 16 below; Mention may be made of salts, as well as mixtures thereof.

Examples of cationic dyes include Basic Blue 6, Basic Blue 7, Basic Blue 9, Basic Blue 26, Basic Blue 41, Basic Blue 99, Basic Brown 4, Basic Brown 16, Basic Brown 17, Natural Brown 7, and Basic Green 1. , Basic Orange 31, Basic Red 2, Basic Red 12, Basic Red 22, Basic Red 51, Basic Red 76, Basic Violet 1, Basic Violet 2, Basic Violet 3, Basic Violet 10, Basic Violet 14, Basic Yellow 57 and Basic Examples include, but are not limited to, Yellow 87 and mixtures thereof. Particularly preferred are Basic Red 51, Basic Orange 31, Basic Yellow 87 and mixtures thereof.

Examples of anionic dyes include Acid Black 1, Acid Blue 1, Acid Blue 3, Food Blue 5, Acid Blue 7, Acid Blue 9, Acid Blue 74, Acid Orange 3, Acid Orange 4, Acid Orange 6, Acid Orange 7. , Acid Orange 10, Acid Red 1, Acid Red 14, Acid Red 18, Acid Red 27, Acid Red 33, Acid Red 50, Acid Red 52, Acid Red 73, Acid Red 87, Acid Red 88, Acid Red 92, Acid Red 155, Acid Red 180, Acid Violet 2, Acid Violet 9, Acid Violet 43, Acid Violet 49, Acid Yellow 1, Acid Yellow 10, Acid Yellow 23, Acid Yellow 3, Food Yellow No. 8, D&C Brown No. 1 , D&C Green No.5, D&C Green No.8, D&C Orange No.4, D&C Orange No.10, D&C Orange No.11, D&C Red No.21, D&C Red No.27, D&C Red No.33, D&C Violet 2, D&C Yellow No.7, D&C Yellow No.8, D&C Yellow No.10, FD&C Red 2, FD&C Red 40, FD&C Red No.4, FD&C Yellow No.6, FD&C Blue 1, Hood Black 1, Hood Examples include, but are not limited to, Black 2, and their alkali metal salts (sodium salts, potassium salts, etc.) and mixtures thereof.

Among these, preferred anionic dyes are Acid Black 1, Acid Red 52, Acid Violet 2, Acid Violet 43, Acid Red 33, Acid Orange 4, Acid Orange 7, Acid Red 27, Acid Yellow 3, Acid Yellow 10, and these. It's salt. More preferred anionic dyes are Acid Red 52, Acid Violet 2, Acid Red 33, Acid Orange 4 and Acid Yellow 10 and salts and mixtures thereof.

Examples of nitro dyes include HC Blue No.2, HC Blue No.4, HC Blue No.5, HC Blue No.6, HC Blue No.7, HC Blue No.8, HC Blue No.9, HC Blue No.10, HC Blue No.11, HC Blue No.12, HC Blue No.13, HC Brown No.1, HC Brown No.2, HC Green No.1, HC Orange No.1, HC Orange No. .2, HC Orange No.3, HC Orange No.5, HC Red BN, HC Red No.1, HC Red No.3, HC Red No.7, HC Red No.8, HC Red No.9, HC Red No.10, HC Red No.11, HC Red No.13, HC Red No.54, HC Red No.14, HC Violet BS, HC Violet No.1, HC Violet No.2, HC Yellow No.2 , HC Yellow No.4, HC Yellow No.5, HC Yellow No.6, HC Yellow No.7, HC Yellow No.8, HC Yellow No.9, HC Yellow No.10, HC Yellow No.11, HC Yellow No.12, HC Yellow No.13, HC Yellow No.14, HC Yellow No.15, 2-amino-6-chloro-4-nitrophenol, picramic acid, 1,2-diamino-4-nitrobenzole, These include 1,4-diamino-2-nitrobenzole, 3-nitro-4-aminophenol, 1-hydroxy-2-amino-3-nitrobenzole and 2-hydroxyethylpicramic acid and mixtures thereof. but not limited to.

Examples of disperse dyes include, but are not limited to, Disperse Blue 1, Disperse Black 9, Disperse Violet 1, and mixtures thereof.

These direct dyes can be used alone or in combination of two or more, and direct dyes with different ionic properties can also be used in combination.

The content of the direct dye in the dye composition is preferably 0.001% by mass or more, more preferably 0.01% by mass or more, and even more preferably 0.05% by mass or more, from the viewpoint of obtaining sufficient dyeability. From the viewpoint of performance, the content is preferably 10% by mass or less, more preferably 7.5% by mass or less, even more preferably 5.0% by mass or less, and still more preferably 3.0% by mass or less.

If the dye composition contains only a direct dye as a dye, an oxidizing agent is not required to dye naturally derived fibers, but if you want to brighten the color of naturally derived fibers, an oxidizing agent may be included in the composition. You can also do it.

When the dye composition contains an oxidation dye, it is usually of a two-part type, with the first part containing an oxidation dye intermediate (precursor and coupler) and an alkaline agent, and the second part containing an oxidizing agent such as hydrogen peroxide. include. The two agents are usually stored separately and mixed before soaking the natural fibers.

The oxidation dye intermediate is not particularly limited, and any known precursors and couplers commonly used in dyed products can be suitably used.

Examples of precursors include paraphenylenediamine, toluene-2,5-diamine, 2-chloro-paraphenylenediamine, N-methoxyethyl-paraphenylenediamine, N-phenylparaphenylenediamine, N,N-bis(2- hydroxyethyl)-paraphenylenediamine, 2-(2-hydroxyethyl)-paraphenylenediamine, 2,6-dimethyl-paraphenylenediamine, 4,4'-diaminodiphenylamine, 1,3-bis(N-(2- Hydroxyethyl)-N-(4-aminophenyl)amino)-2-propanol, PEG-3,3,2'-paraphenylenediamine, paraaminophenol, paramethylaminophenol, 3-methyl-4-aminophenol, 2 -aminomethyl-4-aminophenol, 2-(2-hydroxyethylaminomethyl)-4-aminophenol, orthoaminophenol, 2-amino-5-methylphenol, 2-amino-6-methylphenol, 2-aminophenol -5-acetamidophenol, 3,4-diaminobenzoic acid, 5-aminosalicylic acid, 2,4,5,6-tetraminopyrimidine, 2,5,6-triamino-4-hydroxypyrimidine, 4,5-diamino- Examples include, but are not limited to, 1-(4'-chlorobenzyl)pyrazole, 4,5-diamino-1-hydroxyethylpyrazole, and salts of these substances and mixtures thereof.

Examples of couplers include metaphenylenediamine, 2,4-diaminophenoxyethanol, 2-amino-4-(2-hydroxyethylamino)anisole, 2,4-diamino-5-methylphenetol, 2,4-diamino- 5-(2-hydroxyethoxy)toluene, 2,4-dimethoxy-1,3-diaminobenzene, 2,6-bis(2-hydroxyethylamino)toluene, 2,4-diamino-5-fluorotoluene, 1, 3-bis(2,4-diaminophenoxy)propane, meta-aminophenol, 2-methyl-5-aminophenol, 2-methyl-5-(2-hydroxyethylamino)phenol, 2,4-dichloro-3-amino Phenol, 2-chloro-3-amino-6-methylphenol, 2-methyl-4-chloro-5-aminophenol, N-cyclopentyl-meta-aminophenol, 2-methyl-4-methoxy-5-(2-hydroxy ethylamino)phenol, 2-methyl-4-fluoro-5-aminophenol, para-aminoorthocresol, resorcin, 2-methylresorcin, 4-chlororesorcin, 1-naphthol, 1,5-dihydroxynaphthalene, 1,7-dihydroxy Naphthalene, 2,7-dihydroxynaphthalene, 2-isopropyl-5-methylphenol, 4-hydroxyindole, 5-hydroxyindole, 6-hydroxyindole, 7-hydroxyindole, 6-hydroxybenzomorpholine, 3,4-methylenedi Oxyphenol, 2-bromo-4,5-methylenedioxyphenol, 3,4-methylenedioxyaniline, 1-(2-hydroxyethyl)amino-3,4-methylenedioxybenzene, 2,6-dihydroxy- 3,4-dimethylpyridine, 2,6-dimethoxy-3,5-diaminopyridine, 2,3-diamino-6-methoxypyridine, 2-methylamino-3-amino-6-methoxypyridine, 2-amino-3 -hydroxypyridine, 2,6-diaminopyridine, and salts of these substances and mixtures thereof.

The content of precursor and coupler in the dye composition is preferably 0.01% by mass or more, more preferably 0.1% by mass or more, and preferably 10% by mass or less, more preferably 7.5% by mass or less, More preferably, it is 5.0% by mass or less.

When the dye composition contains an oxidation dye, it further contains an alkaline agent. Suitable alkaline agents include, for example, ammonia and its salts; alkanolamines (monoethanolamine, isopropanolamine, 2-amino-2-methylpropanol, 2-aminobutanol, etc.) and their salts; alkanediamines (1,3 -propanediamine, etc.) and salts thereof; and carbonates (guanidine carbonate, sodium carbonate, potassium carbonate, sodium hydrogen carbonate, potassium hydrogen carbonate, etc.); and mixtures thereof.

The content of the alkaline agent in the dye composition is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, even more preferably 1.0% by mass or more, and preferably 15% by mass or less, more preferably It is 10% by mass or less, more preferably 7.5% by mass or less.

When the dye composition contains an oxidation dye, the composition containing the oxidizing agent (second part) is stored separately from the composition containing the oxidation dye (first part), and mixed before dipping the natural fibers. be done. Suitable oxidizing agents include, but are not limited to, for example, hydrogen peroxide, urea peroxide, melamine peroxide, and sodium bromate. Among these oxidizing agents, hydrogen peroxide is preferred.

The content of the oxidizing agent in the dye composition is preferably 1% by mass or more, more preferably 2% by mass or more, and preferably 15% by mass or less, more preferably 12% by mass or less, and even more preferably It is 9% by mass or less.

When storing the first and second agents separately, the pH of the second agent at 25°C is preferably 2 or more, more preferably 2.5 or more, and preferably 6 or less, more preferably 4 or less. It is. This pH can be adjusted with suitable buffers. The pH at 25°C of the stain composition formed by mixing the first agent and the second agent is preferably 6 or more, more preferably 6.5 or more, even more preferably 6.8 or more, and preferably 11 or less, more preferably It is preferably 10.5 or less, more preferably 10 or less.

When the dye composition contains an oxidative dye, it can also contain the direct dyes exemplified above.

The dye composition can preferably further contain a surfactant, a conditioning component, etc. shown below, and can suitably take the form of a solution, emulsion, cream, paste, and mousse.

The temperature of the dye composition is preferably 0°C or higher, more preferably 10°C or higher, and even more preferably The temperature is 20°C or higher, preferably 90°C or lower, and more preferably 80°C or lower.

(Post-heating: heat treatment to further improve fiber elasticity (tenacity))
Furthermore, from the viewpoint of more effectively improving the elasticity of the naturally-derived fibers, it is possible to heat the naturally-derived fibers while applying tension and drawing them. For this heating, it is preferable to use a hair iron if the amount of naturally-derived fibers is small, but if the amount is large, the same result can be obtained by heating with hot air while applying tension with a winder. Can be done.

The fiber stretching rate during heating is preferably 0.1% or more, more preferably 0.2% or more, and even more preferably 0.5% or more, from the viewpoint of more effectively improving the elasticity of the fibers, and also preventing damage to the fibers. From the viewpoint of suppression, it is preferably 10% or less, more preferably 5.0% or less, even more preferably 2.0% or less.

The heating temperature is preferably 120°C or higher, more preferably 140°C or higher, and even more preferably 160°C or higher, from the viewpoint of more effectively improving the elasticity of the fibers, and from the viewpoint of suppressing damage to the fibers. , preferably 240°C or lower, more preferably 220°C or lower, even more preferably 200°C or lower.

The heating time is preferably 1 second or more, more preferably 3 seconds or more, even more preferably 5 seconds or more, from the viewpoint of more effectively improving the elasticity of the fibers, and from the viewpoint of suppressing damage to the fibers. , preferably 60 seconds or less, more preferably 30 seconds or less, even more preferably 20 seconds or less.

After heating, in order to more effectively improve the elasticity of the fibers, the naturally-derived fibers can be left standing in water while being stretched under tension.

The stretching ratio at this time is preferably 0.1% or more, more preferably 0.2% or more, and still more preferably 0.5% or more, from the viewpoint of more effectively improving the elasticity of the fibers, and also suppressing damage to the fibers. From this viewpoint, it is preferably 10% or less, more preferably 5.0% or less, and even more preferably 2.0% or less.

The water temperature is preferably 5°C or higher, more preferably 20°C or higher, and even more preferably 30°C or higher, from the viewpoint of more effectively improving the elasticity of the fibers, and from the viewpoint of suppressing damage to the fibers. The temperature is preferably 80°C or lower, more preferably 60°C or lower, even more preferably 50°C or lower.

The standing time in water is preferably 1 minute or more, more preferably 5 minutes or more, and still more preferably 30 minutes or more, from the viewpoint of more effectively improving the elasticity of the fibers, and from the viewpoint of improving the elasticity of the fibers. From the viewpoint of suppression, the time period is preferably 48 hours or less, more preferably 24 hours or less, and even more preferably 3 hours or less.

By this operation, depending on the processing conditions of step (i), it is possible to reach a level of elasticity comparable to that of human hair when drying the fiber.

(Suppression or removal of coloring))
Furthermore, when the coordinating functional group of component (A) is a group having OH or O ^- , a salt may be added for the purpose of suppressing or removing coloration in naturally-derived fibers treated with the fiber treatment agent of the present invention. It can be treated by the composition containing it. As the salt, either organic salt or inorganic salt can be used. Specifically, organic salts include organic salts with a chelating effect such as disodium etidronate, disodium ethylenediaminetetraacetate, disodium catechol-3,5-disulfonate monohydrate, sodium phytate, etc. Examples include sodium mercaptoethanesulfonate and sodium 2-naphthalenesulfonate. Examples of inorganic salts include sulfites such as sodium sulfite, sodium chloride, aluminum chlorohydroxy, and the like. Preferred salts for this purpose include organic salts such as reducing salts (such as salts of thiol compounds), metal chelating salts (sodium salts of edetic acid such as disodium ethylenediaminetetraacetate, disodium etidronate, etc.). Examples of inorganic salts include reducing salts (sulfites such as sodium sulfite). Among these, it is more preferable to use a reducing salt and a metal chelating salt in combination.

The fiber coloring caused by the treatment with the fiber treatment agent of the present invention includes both brownish oxidation coloring (which can be treated with a reducing salt) and yellowish catechin metal complex coloring (which can be treated with a chelating agent). It is thought that the coloration of fibers can be better suppressed by performing decolorization treatments corresponding to each type.

Preferably, the salt-containing composition is an aqueous solution. In addition, the pH of this composition is preferably 2.0 or more, more preferably 3.0 from the viewpoint of not reducing the water resistance, elasticity (tenacity, that is, high elongation at break when the fiber is pulled), and heat resistance of the naturally-derived fibers. Above, more preferably 4.0 or more, preferably 9.0 or less, more preferably 7.0 or less, still more preferably 6.0 or less.

The content of salt in the composition is preferably 0.5% by mass or more, more preferably 1.0% by mass or more, and even more preferably 2.0% by mass or more, from the viewpoint of exhibiting the effect of suppressing or removing coloring of naturally-derived fibers. From the viewpoint of not reducing the water resistance, elasticity (tenacity, that is, high elongation at break when the fiber is pulled) and heat resistance of the naturally-derived fibers due to reduction, it is preferably 20% by mass or less, more preferably 10% by mass. % or less, more preferably 5.0% by mass or less.

The treatment temperature with the salt-containing composition is preferably 5° C. or higher, more preferably 10° C. or higher, and even more preferably 20° C. or higher, from the viewpoint of exhibiting the effect of suppressing or removing coloring of naturally-derived fibers. Further, from the viewpoint of avoiding damage to the fibers, the temperature is preferably 100°C or lower, more preferably 60°C or lower, and still more preferably 40°C or lower.

The treatment time with the salt-containing composition is preferably 1 second or more, more preferably 30 seconds or more, and even more preferably 1 minute or more, from the viewpoint of expressing the effect of suppressing or removing coloring of naturally-derived fibers. Further, from the viewpoint of avoiding damage to the fibers, the heating time is preferably 60 minutes or less, more preferably 30 minutes or less, and still more preferably 15 minutes or less.

The texture of the fibers that have undergone the various treatments described above can be improved by subsequent post-treatment of the fibers, such as treatment with a fiber treatment agent such as a fabric softener, or treatment with a hair care agent such as a conditioner or hair treatment. .

By treating naturally derived fibers with the above fiber processing method, by containing the polymer of component (A) in the fibers, shape can be imparted by heat setting, water resistance, heat resistance, tensile strength, etc. Fibers with excellent elastic modulus and highly improved stretchability (tenacity) of naturally derived fibers, preferably fibers for headdress products, etc., can be produced, and the fibers can also be used to produce various textile products, suitably. It is possible to manufacture headdress products etc.
In addition, suitable headdress products in the present invention include, for example, hair wigs, wigs, weaving, hair extensions, braided hair, hair accessories, doll hair, and the like.

Regarding the embodiments described above, preferred aspects of the present invention will be further disclosed below.

<1>
A single-component fiber treatment agent consisting of a single composition or a multi-component fiber treatment agent consisting of multiple compositions, which contain the following components (A) to (C) in the entire composition. Contains fiber treatment agents.
(A): Aromatic compound having one or more vinyl groups or vinylidene groups and a coordinating functional group
(B): Radical initiator
(C)：Water

<2>
The fiber treatment agent according to <1>, wherein the coordinating functional group in component (A) is preferably a group containing Pearson's Hard Base.

<3>
The coordinating functional group in component (A) is preferably a group containing COO ^- , O ^- , COOH, OH or NH ₂ , more preferably a group containing COO ^- , O ^- , COOH or OH, even more preferably carboxy The fiber treatment agent according to <1> or <2>, which is a group containing a group obtained by removing one hydrogen atom from a benzene ring of catechol (1,2-dihydroxybenzene).

<4>
The fiber treatment agent according to any one of <1> to <3>, wherein component (A) is the following component (A-1) or (A-2).
(A-1) Aromatic compounds whose coordinating functional group is a group containing COOH, COO ^- or a salt of COOH
(A-2) Aromatic compounds whose coordinating functional group is a group containing OH, O ^- or OH salt

<5>
The fiber treatment agent according to <4>, wherein component (A-1) is preferably the following component (A-1-a) or (A-1-b).
(A-1-a) Aromatic compound having a vinyl group or vinylidene group as part of the styrene skeleton
(A-1-b) Aromatic compound having a vinyl group or vinylidene group as part of an acryloyl group or methacryloyl group

<6>
Component (A-1-a) is preferably a compound represented by the following general formula (1), more preferably 2-vinylbenzoic acid, 3-vinylbenzoic acid, 4-vinylbenzoic acid, or selected from these. A mixture of two or three types, 4-oxo-4-((4-vinylbenzyl)oxy)butanoic acid, or 2-(((4-vinylbenzyl)oxy)carbonyl)benzoic acid, in <5> The fiber treatment agent described.

[In formula (1), R ¹ represents a hydrogen atom or a methyl group, and A ¹ to A ⁵ each independently represent a hydrogen atom, a carboxy group, a group represented by the general formula (2), an acetyl group, a halogen Atom, or a linear or branched alkyl group, alkenyl group, alkoxy group, or alkenyloxy group having 1 to 6 carbon atoms. In formula (2), R ² is a linear or branched saturated or unsaturated divalent hydrocarbon group having 1 to 6 carbon atoms, a divalent hydrocarbon oxy group, an o-phenylene group, an m-phenylene group, p -Represents a phenylene group, benzylidene group or phenyl C ₂ -C ₄ alkylene group. However, A ¹ to A ⁵ contain at least one carboxy group or a group represented by general formula (2). ]

<7>
Component (A-1-b) is preferably a compound represented by the following general formula (3), more preferably 2-((2-(acryloyloxy)ethoxy)carbonyl)benzoic acid, 2-((2 The fiber treatment agent according to <5>, which is -(methacryloyloxy)ethoxy)carbonyl)benzoic acid or 2-(4-(2-(2-(acryloyloxy)ethoxy)ethoxy)benzoyl)benzoic acid.

[In formula (3), R ³ represents a hydrogen atom or a methyl group, and B ¹ to B ⁴ each independently represent a hydrogen atom, a carboxy group, an acetyl group, a halogen atom, or a straight chain having 1 to 6 carbon atoms. or a branched alkyl group, alkenyl group, alkoxy group or alkenyloxy group, Ph represents a phenylene group, n represents an integer of 0 to 2, and m represents 0 or 1. ]

<8>
The fiber according to <4>, wherein component (A-2) is preferably a compound represented by the following general formula (4), more preferably 4-vinylbenzyl 3,4,5-trihydroxybenzoate. Processing agent.

[In formula (4), R ⁴ represents a hydrogen atom or a methyl group, and E ¹ to E ⁵ each independently represent a hydrogen atom, a hydroxy group, a group represented by the general formula (5), an acetyl group, a halogen atom, or a linear or branched alkyl group, alkenyl group, alkoxy group, or alkenyloxy group having 1 to 6 carbon atoms, and G ¹ to G ⁵ each independently represent a hydrogen atom, a hydroxy group, an acetyl group, It represents a halogen atom, or a linear or branched alkyl group, alkenyl group, alkoxy group, or alkenyloxy group having 1 to 6 carbon atoms. However, E ¹ to E ⁵ contain at least one group represented by general formula (5). ]

<9>
The fiber treatment agent according to any one of <1> to <8>, wherein component (B) is a peroxide initiator, an azo initiator, or a redox initiator.

<10>
The peroxide initiator is preferably sodium persulfate, potassium persulfate, ammonium persulfate, t-butyl hydroperoxide, t-amyl hydroperoxide, p-diisopropylbenzene hydroperoxide, cumene hydroperoxide, pinane hydroperoxide, p-menthane. Hydroperoxide, 1,1,3,3-tetramethylbutyl hydroperoxide, benzoyl peroxide, t-butyl perbenzoate, diisopropyl peroxydicarbonate, di-n-propyl peroxydicarbonate, di(2-ethoxyethyl ) peroxydicarbonate, t-butyl peroxineodecanoate, t-butyl peroxybivalate, (3,5,5-trimethylhexanoyl) peroxide, dipropionyl peroxide, and diacetyl peroxide. The fiber treatment agent according to <9>, which is a type or more.

<11>
The azo initiator is preferably 2,2'-azobisisobutyronitrile, 2,2'-azobis(2-methylbutyronitrile), 1,1'-azobis(cyclohexane-1-carbonitrile), 2 ,2'-azobis(2,4-dimethylvaleronitrile), 2,2'-azobis(2,4-dimethyl-4-methoxyvaleronitrile), dimethyl 2,2'-azobis(2-methylpropionate) , 2,2'-azobis(2-hydroxymethylpropionitrile), 2,2'-azobis[2-methyl-N-(2-hydroxyethyl)propionamide], 4,4'-azobis(4-cyano valeric acid), 2,2'-azobis[2-(2-imidazolin-2-yl)propane], 2,2'-azobis[N-(2-carboxyethyl)-2-methylpropionamidine], 2, One or more selected from 2'-azobis(2-methylpropionamidine) dihydrochloride and 2,2'-azobis[2-(2-imidazolin-2-yl)propane] dihydrochloride, more preferably 2 ,2'-azobis[2-methyl-N-(2-hydroxyethyl)propionamide], 4,4'-azobis(4-cyanovaleric acid), 2,2'-azobis[2-(2-imidazoline- 2-yl)propane], 2,2'-azobis[N-(2-carboxyethyl)-2-methylpropionamidine], 2,2'-azobis(2-methylpropionamidine) dihydrochloride, and 2, One or more selected from 2'-azobis[2-(2-imidazolin-2-yl)propane] dihydrochloride, more preferably 2,2'-azobis[2-(2-imidazolin-2-yl)propane ], 2,2'-azobis[N-(2-carboxyethyl)-2-methylpropionamidine], 2,2'-azobis(2-methylpropionamidine) dihydrochloride, and 2,2'-azobis[ The fiber treatment agent according to <9>, which is one or more selected from 2-(2-imidazolin-2-yl)propane] dihydrochloride.

<12>
Redox initiators include sodium persulfate, potassium persulfate, ammonium persulfate, t-butyl hydroperoxide, t-amyl hydroperoxide, p-diisopropylbenzene hydroperoxide, cumene hydroperoxide, pinane hydroperoxide, p-menthane hydroperoxide, 1 ,1,3,3-tetramethylbutyl hydroperoxide, benzoyl peroxide, t-butyl perbenzoate, diisopropyl peroxydicarbonate, di-n-propyl peroxydicarbonate, di(2-ethoxyethyl)peroxydicarbonate Carbonate, t-butyl peroxyneodecanoate, t-butyl peroxybivalate, (3,5,5-trimethylhexanoyl) peroxide, dipropionyl peroxide, diacetyl peroxide, hydrogen peroxide, hypochlorous acid An oxidizing agent selected from sodium, potassium hypochlorite, oxygen, and ozone, sodium sulfite, potassium sulfite, sodium bisulfite, potassium bisulfite, sodium pyrosulfite, potassium pyrosulfite, iron (II valent) ion, chromium ion, The fiber treatment agent according to <9>, which is a combination of reducing agents selected from ascorbic acid, formaldehyde sulfoxylate, tetramethylene diamine, and sodium hydroxymethyl sulfinate.

<13>
Preferably, the content of component (B) in the fiber treatment agent (in the case of a multi-component fiber treatment agent, the content of component (B) in the composition containing component (B)) is non-dissociable. 0.001% by mass or more, more preferably 0.01% by mass or more, still more preferably 0.1% by mass or more, even more preferably 0.5% by mass or more, and preferably 80% by mass or less, more preferably 60% by mass or less, and The fiber treatment agent according to any one of <1> to <12>, preferably at most 40% by mass, even more preferably at most 20% by mass.

<14>
The content of component (C) is preferably 10% by mass or more, more preferably 20% by mass or more, even more preferably 30% by mass or more, even more preferably 40% by mass or more, and preferably 98% by mass or less. , more preferably 97% by mass or less, still more preferably 96% by mass or less, even more preferably 95% by mass or less, even more preferably 90% by mass or less, even more preferably 85% by mass or less, <1>~ The fiber treatment agent according to any one of <13>.

<15>
The pH of the fiber treatment agent is preferably 2.0 or higher, more preferably 3.0 or higher, even more preferably 3.5 or higher, even more preferably 4.0 or higher, and preferably 11.0 or lower, more preferably 10.0 or lower, and even more preferably 9.0. The fiber treatment agent according to any one of <1> to <14> below.

<16>
The pH of the treatment agent containing component (A) is 2.0 or more and less than 6.5, and the content of component (A) in the fiber treatment agent is preferably 0.1% by mass or more, more preferably 0.2% as a non-dissociated type. % by mass or more, more preferably 0.5% by mass or more, even more preferably 1.0% by mass or more, and preferably 40% by mass or less, more preferably 30% by mass or less, even more preferably 25% by mass or less, and even more The fiber treatment agent according to any one of <1> to <15>, preferably at most 20% by mass, even more preferably at most 15% by mass.

<17>
The pH of the treatment agent containing component (A) is 6.5 or more and 11.0 or less, and the content of component (A) in the fiber treatment agent is preferably 1.0% by mass or more, more preferably 1.0% by mass or more as a non-dissociated type. 2.0% by mass or more, more preferably 5.0% by mass or more, even more preferably 10% by mass or more, and preferably 90% by mass or less, more preferably 80% by mass or less, still more preferably 70% by mass or less. The fiber treatment agent according to any one of <1> to <15>, which is more preferably 60% by mass or less.

<18>
Components ( The mass ratio (B)/(A) of component (B) to A) is preferably 0.001 or more, more preferably 0.01 or more, and preferably 200 or less, more preferably 50 or less, <1> ~ The fiber treatment agent according to any one of <17>.

<19>
A fiber treatment agent kit comprising a composition containing the following components (A) and (C), and a composition containing the following components (B) and (C).
(A): Aromatic compound having one or more vinyl groups or vinylidene groups and a coordinating functional group
(B): Radical initiator
(C)：Water

<20>
A fiber processing method comprising the following step (i).
Step (i) A step of soaking the naturally-derived fibers in a single composition or multiple compositions containing the following components (A) to (C) in the entire composition:
(A): Aromatic compound having one or more vinyl groups or vinylidene groups and a coordinating functional group
(B): Radical initiator
(C)：Water

<21>
A fiber processing method comprising the following step (i).
Step (i) A step of soaking the naturally-derived fibers in a single composition or multiple compositions containing the following components (A) to (C) in the entire composition:
(A): Aromatic compound having one or more vinyl groups or vinylidene groups and a coordinating functional group (excluding vinylbenzoic acid and its salts)
(B): Radical initiator
(C)：Water

<22>
Use of a single composition or a plurality of compositions containing the following components (A) to (C) in the total composition as a fiber treatment agent.
(A): Aromatic compound having one or more vinyl groups or vinylidene groups and a coordinating functional group
(B): Radical initiator
(C)：Water

<23>
Use of a single composition or a plurality of compositions containing the following components (A) to (C) in the total composition as a fiber treatment agent.
(A): Aromatic compound having one or more vinyl groups or vinylidene groups and a coordinating functional group (excluding vinylbenzoic acid and its salts)
(B): Radical initiator
(C)：Water

Example 1, Comparative Examples 1 to 3
Using the composition shown in Table 1, regenerated collagen fibers were treated according to the following method, and various evaluations were performed. The pH of each composition was measured using a pH meter (manufactured by HORIBA, F-52) at room temperature (25° C.).

<Processing method>
1. Regenerated collagen fibers (*) 0.50g of hair strands with a length of 22cm are soaked in a container containing a fiber treatment agent in an amount that corresponds to the bath ratio shown in the table. It was immersed in a water bath (manufacturer: Toyo Seisakusho Co., Ltd./model number: TBS221FA) at the temperature shown and heated for the time shown in the table.
*: Regenerated collagen fibers manufactured by Kaneka were purchased in the form of commercially available extension products, and the fibers were cut and divided into hair bundles for evaluation. For this evaluation, we used extension products that are labeled as using 100% Ultima as the fiber type, are white with a color count of 30, and are straight in shape.
2. The container containing the hair tresses was removed from the water bath and allowed to come to room temperature.
3. Remove the hair strands from the container, rinse with running tap water at 30°C for 30 seconds, lather with evaluation shampoo for 60 seconds, rinse with running tap water at 30°C for 30 seconds, lightly dry with a towel, and remove the hair strands. was dried while combing with a hot air dryer (Tescom, Nobby White NB3000).

<Formulation of shampoo for evaluation>
Ingredients (mass%)
Sodium Laureth Sulfate 15.5
Lauramid DEA 1.5
EDTA-2Na 0.3
Phosphoric acid Amount to adjust to pH7 Ion exchange water Balance Total 100

<Increase in average elongation at break during fiber tension>
As an index of water resistance and elasticity (tenacity), the average elongation at break when the fiber is stretched, that is, the percentage of the original fiber length at which the fiber breaks when the fiber is stretched by tension. The average value of multiple fibers (10 fibers) was used to determine whether or not this occurred. The evaluation was performed using the hair bundles immediately after being treated in the above <Treatment Method> according to the following procedure.
1. Ten fibers were cut from the root of the hair bundle. A 3 cm piece of fiber was collected from around the middle between the root and tip of each fiber, yielding a total of 10 pieces of 3 cm hair.
2. The fiber piece was set in "MTT690 Automatic Fiber Tensile Testing Machine" manufactured by DIA-STRON limited. Automatic measurement was started after the fibers were left immersed in water for 30 minutes, and the average elongation at break was determined while the fibers were immersed in water. The higher the numerical value, the higher the elasticity, the higher the tenacity, and the higher the durability.

According to the following formula, the average breaking elongation (A%) of the hair bundle after the treatment is based on the average breaking elongation (A%) when the fiber is pulled as it is (untreated; Comparative Example 1) cut from a commercially available product (untreated; Comparative Example 1), and the average breaking elongation (B %) increased from the untreated state (C%) is described in the table as "increase rate [%] of average elongation at break during fiber tension."
C (%) = B (%) - A (%)

<Increase in average breaking load during fiber tension>
The average breaking load during fiber tension was used as an index of water resistance. The evaluation was performed using hair bundles immediately after being treated by the above <treatment method>. Further, as the numerical value, the average value when evaluating multiple fibers (10 fibers) was used. The evaluation was performed according to the following procedure.
1. Ten fibers were cut from the root of the hair bundle. A 3 cm piece of fiber was collected from around the middle between the root and tip of each fiber, yielding a total of 10 pieces of 3 cm hair.
2. The fiber piece was set in "MTT690 Automatic Fiber Tensile Testing Machine" manufactured by DIA-STRON limited. Automatic measurement was started after leaving the fiber immersed in water for 30 minutes, and the breaking load when the fiber was stretched while immersed in water was determined. The higher the value, the firmer the material is, the more resistant it is to stretching by external force, and the more durable it is.

According to the following formula, the average breaking load (W 0 (gf)) of the hair bundle after the treatment is based on the average breaking load (W ₀ (gf)) when the fiber is pulled in the as-is condition (untreated; Comparative Example 1) cut from the commercially available product (untreated; Comparative Example 1). The extent to which W ₁ (gf)) increased from the untreated state (Y (gf)) is shown in the table as "increase in average breaking load during fiber tension [gf]".
Y (gf) = W ₁ (gf) - W ₀ (gf)

<Shrinkage rate when setting with high temperature iron>
The shrinkage rate when set with a high temperature iron was used as an index of heat resistance. The evaluation was performed using hair bundles immediately after being treated by the above <treatment method>. Further, as the numerical value, the average value when evaluating a plurality of fibers (5 fibers) was used. The evaluation was performed according to the following procedure.
1. <Treatment method> Five fibers were cut from the root of the hair bundle immediately after treatment and marked. After these treatments, the lengths of the five fibers were measured, and the average value was recorded (defining the length _L1 ). Next, the five treated fibers with these markings are bundled together between two separately prepared hair bundles of untreated regenerated collagen fibers of 0.5 g (1 g in total) to form a new hair bundle (hereinafter referred to as a large hair bundle). A flat iron (manufactured by Miki Electric Industrial Co., Ltd./model number: AHI-938) set at 180°C was applied 10 times at a speed of 5 cm/sec to the entire large hair bundle.
2. After the ironing operation, take out the 5 marked treated fibers from the large hair bundle, measure the length of each of the 5 marked treated fibers, and record the average value (take the length L ₂ ). did.
3. The shrinkage rate when set with a high temperature iron was defined as S _dry = {1-(L ₂ /L ₁ )} x 100 [%]. The closer S _dry is to 0%, the less shrinkage due to dry heat occurs and the better the heat resistance is.

<Shrinkage rate when heating hot water>
The shrinkage rate when heated with hot water was used as an index of water resistance and heat resistance. The evaluation was performed using hair bundles immediately after being treated by the above <treatment method>. Further, as the numerical value, the average value when evaluating a plurality of fibers (5 fibers) was used. The evaluation was performed according to the following procedure.
1. Cut 5 fibers from the root of the hair bundle, record the average length of each fiber (length L ₁ ), and then soak in a 90℃ water bath (manufacturer: Toyo Seisakusho Co., Ltd. / model number: TBS221FA) ) and heated for 1 minute.
2. After the heating operation, take out the 5 fibers, lightly drain them with a towel, dry them at room temperature and humidity for 30 minutes, and then record the average length of each fiber (length L ₂ ). did.
3. The shrinkage rate during hot water heating was defined as Swet = {1-(L ₂ /L ₁ )} x 100 [%]. The closer Swet is to 0%, the less shrinkage due to moist heat occurs and the better the heat resistance is.

<Thermal shape memory ability>
Thermal shape memory ability was evaluated using hair bundles immediately after being treated by the above <treatment method>. In addition, when the value of the result of "I: Shape imparting (curl)" was 5% or less, it was considered that there was no effect, and subsequent processing and evaluation were not performed.
・I: Giving shape (curl)
1. A 22 cm long hair bundle containing 0.5 g of regenerated collagen fibers was wetted with tap water at 30°C for 30 seconds, and then the wet hair bundle was wrapped around a plastic rod with a diameter of 14 mm and fixed with a clip.
2. The hair bundle wrapped around the rod was immersed in a 60°C water bath (manufacturer: Toyo Seisakusho Co., Ltd./model number: TBS221FA) and heated for 1 minute.
3. The hair tresses were taken out of the water bath, immersed in water at 25°C for 1 minute, taken out of the water, and allowed to return to room temperature.
4. The hair bundle was removed from the rod, passed through the comb three times, and 3 minutes after being removed from the water, a photo was taken from the side while it was hanging.

(Evaluation criteria)
Assuming that the length of the untreated hair bundle is L ₀ (22cm) and the length of the hair bundle after treatment is L, the curl up rate = hair bundle length reduction rate (I) (%) is calculated according to the following formula. Defined as strength.
I=[(L ₀ -L)/L ₀ ]×100

・II: Reshaping (straight)
1. The hair bundle evaluated in I was passed through a comb to remove tangles, and then slid 6 times at a speed of 5 cm/sec with a flat iron (manufactured by Miki Electric Industrial Co., Ltd./model number: AHI-938) set at 180°C.
2. After rinsing with running tap water at 30°C for 30 seconds, lathering with evaluation shampoo for 60 seconds, rinsing with running tap water at 30°C for 30 seconds, and towel drying.
3. After hanging and air drying at 20°C and 65% RH for 12 hours, passing it through a comb, it was visually observed from the side while hanging.

(Evaluation criteria)
The straightening rate (ST) (%) determined according to the following formula was defined as the degree of straightening, where the length of the untreated hair bundle was L ₀ (22 cm) and the length of the hair bundle after treatment was L. When ST=100%, the hair bundle is completely straightened.
ST=[1-(L ₀ -L)/L ₀ ]×100

・III: Reshaping (curl)
1. The hair bundle evaluated in II was wetted with tap water at 30°C for 30 seconds, and then the wet hair bundle was wrapped around a plastic rod with a diameter of 14 mm and fixed with a clip.
2. The hair bundle wrapped around the rod was immersed in a 60°C water bath (manufacturer: Toyo Seisakusho Co., Ltd./model number: TBS221FA) and heated for 1 minute.
3. The hair tresses were taken out of the water bath, immersed in water at 25°C for 1 minute, taken out of the water, and allowed to return to room temperature.
4. The hair bundle was removed from the rod, passed through the comb three times, and 3 minutes after being removed from the water, a photo was taken from the side while it was hanging.

(Evaluation criteria)
Assuming that the length of the untreated hair bundle is L ₀ (22cm) and the length of the hair bundle after treatment is L, the curl up rate = hair bundle length reduction rate (I) (%) is calculated according to the following formula. Defined as strength.
I=[(L ₀ -L)/L ₀ ]×100

<Good surface feel>
To evaluate the surface feel, 5 expert panelists evaluated the smoothness of the touch using the following criteria using hair strands that had just been treated using the <treatment method>. This is the evaluation result.
(Evaluation criteria)
5: Extremely smooth texture compared to untreated fibers (Comparative Example 1) 4: Smooth texture compared to untreated fibers (Comparative Example 1) 3: Compared to untreated fibers (Comparative Example 1) Slightly smooth to the touch 2: Same texture as untreated fibers (Comparative Example 1) 1: Rough and squeaky, inferior to untreated fibers (Comparative Example 1)

<Suppression of coloring of fibers>
1. For each of the front and back sides of the hair bundle, the color was measured near the root, near the middle, and near the tip using a colorimeter (Konica Minolta Colorimeter CR-400), and the average value of a total of 6 points was taken as the colorimetric value ( L, a, b).
2. The degree of coloring was evaluated by ΔE*ab using an untreated hair bundle of color count 30 white (*) (Comparative Example 1) as a standard. In addition, the color was measured on the same day that the treatment was performed.

(*) Untreated hair bundles with a color count of 30 white Regenerated collagen fibers made by Kaneka were purchased in the form of commercially available extension products, and the fibers were cut and divided into hair bundles for evaluation. In this evaluation, we used extension products that are labeled as using 100% Ultima as the fiber type, are white with a color count of 30, and have a straight shape.

ΔE*ab is when the measured values of the untreated hair bundle with color count 30 white are (L ₀ , a ₀ , b ₀ ) and the measured values of the treated hair bundle are (L ₁ , a ₁ , b ₁ ) , [(L ₁ -L ₀ ) ² + (a ₁ -a ₀ ) ² +(b ₁ -b ₀ ) ² ] ^1/2 , and the coloring suppression effect was judged according to the following criteria.

5: ΔE*ab ≦ 5.0
4:5.0< ΔE*ab ≦ 10.0
3: 10.0< ΔE*ab ≦ 15.0
2: 15.0< ΔE*ab ≦ 20.0
1:20.0<ΔE*ab

Examples 2 to 11
Regenerated collagen fibers were treated using the first and second agents of the formulation shown in Table 2 according to the following method, and various evaluations were performed. The pH of each composition was measured using a pH meter (manufactured by HORIBA, F-52) at room temperature (25° C.).
In addition, the concentration of each component described in the table is the concentration in the first agent and the second agent, respectively.

<Processing method>
1. A hair bundle of 0.5 g of regenerated collagen fiber (*) with a length of 22 cm is immersed in a container containing the first agent in an amount that corresponds to the bath ratio shown in the table. It was immersed in a water bath (manufacturer: Toyo Seisakusho Co., Ltd./model number: TBS221FA) at the temperature shown and heated for the time shown in the table.
*: Regenerated collagen fibers manufactured by Kaneka were purchased in the form of commercially available extension products, and the fibers were cut and divided into hair bundles for evaluation. For this evaluation, we used extension products that are labeled as using 100% Ultima as the fiber type, are white with a color count of 30, and are straight in shape.
2. The container containing the hair tresses was removed from the water bath and allowed to come to room temperature.
3. Remove the hair strands from the container, rinse with running tap water at 30°C for 30 seconds, lather with evaluation shampoo for 60 seconds, rinse with running tap water at 30°C for 30 seconds, lightly dry with a towel, and remove the hair strands. was dried while combing with a hot air dryer (Tescom, Nobby White NB3000).
4. Dip the hair strands into a container containing the second agent in an amount that corresponds to the bath ratio shown in the table, seal the mouth of the container, and place the whole container in a water bath at the temperature shown in the table (manufacturer: Toyo Seisakusho Co., Ltd./ Model number: TBS221FA) and heated for the time shown in the table.
5. The container containing the hair tresses was removed from the water bath and allowed to come to room temperature.
6. Remove the hair strands from the container, rinse with running tap water at 30°C for 30 seconds, lather with evaluation shampoo for 60 seconds, rinse with running tap water at 30°C for 30 seconds, lightly dry with a towel, and remove the hair strands. was dried while combing with a hot air dryer (Tescom, Nobby White NB3000). At this point, the hair bundle remained straight.

Note that as a result of visual observation of the hair tresses treated in the above Examples, no coloring was observed except in Examples 9 and 10. Although some coloring (light yellow) was observed in Examples 9 and 10, ΔE*ab was 5.0 or less (rating 5).

Comparative example 4
Regenerated collagen fibers were treated according to the <treatment method> in Example 1 and Comparative Examples 1 to 3 using the formulation shown below. As a result of evaluating the degree of coloring of the fibers of the hair bundles after treatment in the same manner as above, brownish coloration was observed (evaluation 1).
Raw material name Amount [mass%]
Formaldehyde 10.0
Resorcinol 15.0
Water remaining amount
pH adjuster (hydrochloric acid or sodium hydroxide) (pH adjustment amount)
Total 100.0

pH (25℃): 5.5
Bath ratio: 40
Heating conditions: 50℃ 3 hours

Claims (9)

A single-component fiber treatment agent consisting of a single composition or a multi-component fiber treatment agent consisting of multiple compositions, which contain the following components (A) to (C) in the entire composition. Contains fiber treatment agents.
(A): Aromatic compound having one or more vinyl groups or vinylidene groups and a coordinating functional group
(B): Radical initiator
(C)：Water The fiber treatment agent according to claim 1, wherein the coordinating functional group in component (A) is a group containing Pearson's hard base. The fiber treatment agent according to claim 1 or 2, wherein the coordinating functional group in component (A) is a group containing COO ^- , O ^- , COOH or OH. The fiber treatment agent according to claim 3, wherein component (A) is the following component (A-1) or (A-2).
(A-1) Aromatic compounds whose coordinating functional group is a group containing COOH, COO ^- or a salt of COOH
(A-2) Aromatic compounds whose coordinating functional group is a group containing OH, O ^- or OH salt The fiber treatment agent according to claim 4, wherein component (A) is component (A-1). The fiber treatment agent according to any one of claims 1 to 5, wherein component (B) is an azo initiator. The pH of the fiber treatment agent containing component (A) is 2.0 or more and less than 6.5, and the content of component (A) in the fiber treatment agent is 0.1% by mass or more and 40% by mass or less as a non-dissociated type. The fiber treatment agent according to any one of claims 1 to 6. The pH of the fiber treatment agent containing component (A) is 6.5 or more and less than 11.0, and the content of component (A) in the fiber treatment agent is 1.0% by mass or more and 90% by mass or less as a non-dissociated type. The fiber treatment agent according to any one of claims 1 to 6. A fiber treatment agent kit comprising a composition containing the following components (A) and (C), and a composition containing the following components (B) and (C).
(A): Aromatic compound having one or more vinyl groups or vinylidene groups and a coordinating functional group
(B): Radical initiator
(C)：Water