Methods for fragrance application to textile products

Abstract

This invention provides a method for fragrance-applying textile products and a method for enhancing the fragrance of textile products, which can improve the effectiveness of the fragrance from textile products, particularly when the textile products become damp due to perspiration during use. [Solution] A method for fragrance-adding textile products, comprising treating the textile products with rinse water containing (a) a surfactant at a concentration of 5 ppm to 500 ppm, (b) a fragrance, and (c) an organic carboxylic acid, with a pH of 1 to less than 6, during the rinsing step of the textile product washing cycle.

Description

[Technical Field]

[0001] The present invention relates to a method for fragrance-applying textile products. [Background technology]

[0002] In recent years, the need for fragrances in daily life has increased, and various technologies have been devised to add fragrance to textile products such as clothing. Among these, the method of attaching fragrances to textile products during the washing process is preferred due to its simplicity. However, since the fragrance components are excessively diluted in the washing and rinsing water, it is difficult to effectively scent the textile products. Therefore, there is a need for a technology that can effectively scent textile products even in treatment solutions that are excessively diluted with water.

[0003] Patent Document 1 discloses an aqueous acidic fragrance composition that increases the freedom of fragrance blending and allows the fragrance to last for a long time on an object, comprising a fragrance composition (a1) containing 10 to 100% by mass of a fragrance component with a LogPow of 3.0 to 30, and 2,6-di-t-butyl-4-hydroxytoluene (a2), pre-mixed in a mass ratio of (a1) / (a2) = 3 to 200, a surfactant (B), and water. Patent Document 2 discloses a liquid fabric care composition comprising 0.1% to 20% by weight of vinegar in the fabric care composition, 0.1% to 20% by weight of an aromatic substance in the fabric care composition, characterized in that the aromatic substance has a logP of less than 2.5, and at least 30% by weight of water in the fabric care composition, wherein the fabric care composition has an undiluted pH of 1 to 6, and is characterized by acceptable stability and olfactory properties. Patent Document 3 discloses a liquid acidic softener composition that does not change in quality even after long-term storage, comprising (a) one or more cationic surfactant components having 8 to 46 carbon atoms and at least one hydrocarbon group having an ester group in the molecule, and (b) a specific organic sulfur compound or nitro compound. Patent Document 4 discloses an acidic laundry detergent composition comprising: a surfactant system having a hydrophilicity index of about 9.00 or higher, comprising less than about 20% of a surfactant selected from the group consisting of anionic surfactants, nonionic surfactants, cationic surfactants, and mixtures thereof; an organic acidifying agent at a concentration such that the ratio of the surfactant system to the organic acidifying agent is about 3.0 or lower; and an alkaline neutralizing agent added in an amount necessary to raise the pure pH of the detergent composition to about 2.5 or higher but about 3.0 or lower. [Prior art documents] [Patent Documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2010-159325 [Patent Document 2] Japanese Patent Publication No. 2020-76087 [Patent Document 3] Japanese Patent Publication No. 2001-192966 [Patent Document 4] Special Publication No. 2015-508445 [Overview of the project] [Problems that the invention aims to solve]

[0005] The present invention provides a method for fragrance-applying textile products and a method for enhancing the fragrance of textile products, which can improve the effectiveness of the fragrance from textile products, particularly when the textile products become moist due to perspiration during use. [Means for solving the problem]

[0006] The inventors have discovered a method for fragrance-applying textile products that can improve the effectiveness of the fragrance from the textile products, particularly when the textile products become wet due to sweating during use, by controlling the pH of the rinse water that comes into direct contact with the textile products and the concentration of the surfactant. In other words, the present invention relates to a method for fragrance-imparting textile products, wherein the textile products are treated with rinse water containing (a) a surfactant (hereinafter referred to as component (a)) in a concentration of 5 ppm to 500 ppm, (b) a fragrance (hereinafter referred to as component (b)), and (c) an organic carboxylic acid (hereinafter referred to as component (c)), and the pH is 1 to less than 6, during the rinsing step of the washing cycle of textile products.

[0007] The present invention also relates to a method for enhancing the fragrance of textile products, wherein, in the rinsing step of the washing cycle of textile products, a textile product treatment agent composition containing component (a) and component (b), and a fragrance enhancer composition containing component (c) are added to the rinse water, and the textile products are treated with the rinse water having a content of component (a) of 5 ppm or more and 500 ppm or less, and a pH of 1 or more and less than 6. [Effects of the Invention]

[0008] The present invention provides a method for fragrance-applying textile products and a method for enhancing the fragrance of textile products, which can improve the perceived effectiveness of the fragrance from textile products, particularly when the textile products become moist due to perspiration during use. [Modes for carrying out the invention]

[0009] The reason why the present invention's method for fragrance-applying textile products and method for enhancing the fragrance of textile products can improve the perceived effectiveness of the fragrance from textile products, particularly when the textile products become wet due to sweating during use, is not entirely clear, but it is presumed to be as follows. Cotton fibers, a typical material for textile products, become negatively charged on their surface under neutral pH conditions such as rinse water in a washing cycle. This is because the equilibrium between proton dissociation and non-dissociation of hydrophilic groups, such as carboxyl groups, on the cellulose chains shifts towards dissociation. Furthermore, mixtures of multiple fragrance components commonly found in textile products often include hydrophilic fragrances with hydroxyl or carboxyl groups, chosen for their palatability and stability within the product. As a result, these fragrance component mixtures are expected to become negatively charged in the rinse water during a washing cycle, similar to the fibers themselves, and are less likely to adsorb to textile products due to charge repulsion. Therefore, the driving force for adsorption depends on co-adsorption with surfactants. For these reasons, the adsorption rate of hydrophilic fragrances, in particular, is significantly lower than that of hydrophobic fragrances. This often leads to a decrease in fragrance intensity that contradicts the design concept, and limitations in the range of fragrance expression, thus reducing the freedom of fragrance blending. These issues are even more pronounced in humid conditions, where hydrophilic fragrances are particularly easily detected. In response to the above problems, the present invention includes a specific amount of surfactant (component a) and fragrance (component b) in the rinse water during the washing cycle, and by adding an organic carboxylic acid (component c) to lower the pH to a specific range, it is believed that proton dissociation of hydrophilic groups is suppressed. As a result, it is believed that the charge repulsion is reduced, and the amount of adsorption of fragrance, especially hydrophilic fragrance, increases, resulting in an improvement in fragrance intensity and expressiveness. On the other hand, although the pH of the compositions specifically described in the prior art document mentioned above is acidic, they have almost no buffering capacity for pH when diluted with water. Therefore, when the compositions are diluted and brought into direct contact with textile products, the pH of the treatment solution is almost neutral and does not meet the requirements for the rinse water used in the present invention. Furthermore, the present invention is not limited to the mechanism of action described above.

[0010] The present invention relates to a method for fragrance-imparting textile products, wherein the textile products are treated with rinse water containing (a) a surfactant (hereinafter referred to as component (a)) in a concentration of 5 ppm to 500 ppm, (b) a fragrance (hereinafter referred to as component (b)), and (c) an organic carboxylic acid (hereinafter referred to as component (c)), and having a pH of 1 to less than 6, during the rinsing step of the washing cycle of textile products. Hereinafter, the rinse water used in the method for fragrance-applying textile products according to the present invention will be referred to as "the rinse water of the present invention." In this invention, the washing cycle refers to a series of steps such as washing, dehydrating, watering, rinsing, dehydrating, and drying of a textile product.

[0011] The rinse water of the present invention contains a surfactant as component (a). The surfactant is used for the purpose of emulsifying and dispersing component (b) in the rinse water, and may be one or more selected from cationic surfactants (hereinafter referred to as component (a1)), nonionic surfactants (hereinafter referred to as component (a2)), anionic surfactants (hereinafter referred to as component (a3)), and amphoteric surfactants (hereinafter referred to as component (a4)). Furthermore, from the viewpoint of further enhancing the adsorption of component (b) to the textile product, component (a) is preferably one or more selected from component (a1) and component (a2), with component (a1) being more preferred.

[0012] As the cationic surfactant of component (a1), at least one compound selected from tertiary amines represented by the following general formula (a11), their salts, and quaternary compounds of the amines is preferred.

[0013] [ka]

[0014] [In the formula, R a11 The group is a hydrocarbon group with a total number of carbon atoms of 12 to 28, which may be divided by one or more selected from ester groups, amide groups, and ether groups, and R a12 Base and R a13 Each base is independent, R a11It is a group selected from a group, an alkyl group having 1 to 3 carbon atoms, a hydroxyalkyl group having 1 to 3 carbon atoms, and a hydroxyalkyl ether alkylene group having 4 to 6 carbon atoms.

[0015] In the general formula (a11), R a11 The group is preferably a hydrocarbon group having 12 or more, preferably 14 or more, and 28 or less, preferably 26 or less carbon atoms, which is segmented by one or more selected from an ester group, an amide group, and an ether group. In this case, the hydrocarbon group may be either saturated or unsaturated. That is, preferable R a11 Examples of the group include the groups shown in the following (i) to (iii). (i) A saturated hydrocarbon group having 12 or more, preferably 14 or more, and 28 or less, preferably 26 or less carbon atoms, which is segmented by one or more selected from an ester group, an amide group, and an ether group (ii) An unsaturated hydrocarbon group having 12 or more, preferably 14 or more, and 28 or less, preferably 26 or less carbon atoms, which has one or more double bonds and is segmented by one or more selected from an ester group, an amide group, and an ether group (iii) A mixture of the above group (i) and group (ii)

[0016] Also, preferable R a12 group and R a13 The groups are each independently a group the same as the R a11 group, an alkyl group having 1 to 3 carbon atoms, a hydroxyalkyl group having 1 to 3 carbon atoms, and a group selected from a hydroxyalkyl ether alkylene group having 4 to 6 carbon atoms.

[0017] The component (a1) can be obtained, for example, by subjecting a fatty acid or a fatty acid lower alkyl ester having 12 to 28 carbon atoms in total and an amine such as an alkanolamine having an alkanol group having 2 or 3 carbon atoms or an aminoalkylamine having an alkylamine group having 2 or 3 carbon atoms to an esterification reaction, an amidation reaction, or a transesterification reaction, or by reacting the alkanolamine with an alkylene oxide having 2 or 3 carbon atoms and then subjecting the reaction product to the above reaction.

[0018] The aforementioned fatty acids or lower alkyl fatty acid esters are preferably fatty acids with a total of 12 to 28 carbon atoms or their lower alkyl esters (the alkyl group has 1 to 3 carbon atoms), and one or a mixture of two or more types can be used. The fatty acid or lower alkyl fatty acid ester may be a fatty acid commonly known from the Fat and Oil Handbook, etc., as needed, and can be obtained by hydrogenation of the unsaturated bond, isomerization of the unsaturated bond, distillation, adjustment of the alkyl chain length by bottom cut or top cut, or by mixing multiple fatty acids.

[0019] The aforementioned aminoalkylamine is preferably an amine having at least two amino groups selected from primary, secondary, and tertiary amino groups within its molecule. The aforementioned alkanolamine is preferably an amine that requires a hydroxyl group within its molecule and has primary to tertiary amino groups. More specific examples include, but are not limited to, dialkylmonoalkanolamines (preferably dimethylmonoethanolamine or dimethylmonopropanolamine), monoalkyldialkanolamines (preferably methyldiethanolamine or methyldipropanolamine), or trialkanolamines (preferably triethanolamine or trippropanolamine), or di(aminoalkyl)alkylamines (e.g., N-methyl-N,N-di(3-aminopropyl)amine), dialkylaminoalkylamines (e.g., N,N-dimethyl-N-(3-aminopropyl)amine), and alkylaminopropylmonoalkylalkanolamines (preferably N-methyl-N-(2-hydroxyethyl)-N-(3-aminopropyl)amine). More preferably are N-methyldiethanolamine, triethanolamine, N-methyl-N-(2-hydroxyethyl)-N-(3-aminopropyl)amine, N,N-dimethyl-N-(3-aminopropyl)amine, and N,N-dimethyl-N-(2-hydroxyethyl)amine.

[0020] Examples of salts of tertiary amines represented by general formula (a11) include salts neutralized with inorganic and organic acids. Preferred inorganic acids are hydrochloric acid, sulfuric acid, and phosphoric acid. Preferred organic acids are monovalent or polyvalent carboxylic acids having 1 to 10 carbon atoms, or monovalent or polyvalent sulfonic acids having 1 to 20 carbon atoms, or alkyl sulfate esters having 6 to 36 carbon atoms, or polyoxyalkylene alkyl (alkyl group having 6 to 36 carbon atoms) sulfate esters. More preferably are methyl sulfate, ethyl sulfate, p-toluenesulfonic acid, (o-, m-, p-)xylenesulfonic acid, benzenesulfonic acid, dodecylbenzenesulfonic acid, glycolic acid, citric acid, benzoic acid, salicylic acid, alkyl sulfate esters having 12 to 36 carbon atoms, or polyoxyalkylene alkyl (alkyl group having 12 to 36 carbon atoms) sulfate esters.

[0021] Quaternary compounds of tertiary amines represented by general formula (a11) include compounds obtained by quaternizing a tertiary amine represented by general formula (a11) with an alkylating agent such as an alkyl halide, dialkyl sulfate, or alkylene oxide. Methyl chloride is preferred as the alkyl halide, dimethyl sulfate and diethyl sulfate are preferred as the dialkyl sulfate, and ethylene oxide is preferred as the alkylene oxide. Furthermore, the quaternization reaction using an alkylating agent can be carried out in the presence of a solvent (e.g., ethanol), but it can also be carried out in a solvent-free environment from the viewpoint of maintaining the odor and storage stability of the synthesized product and / or suppressing the generation of impurities.

[0022] Component (a1) may be one or more selected from the components (a1-1) and (a1-2) listed below. (a1-1) Components: A tertiary amine compound represented by the following general formula (a12), and its salt. (a1-2) Components: Quaternary compounds of tertiary amine compounds represented by the following general formula (a12). [R a14 -C(=O)-O-(C p H 2p O) r -C q H 2q ] mN(R a15 ) 3-m (a12) [During the ceremony, R a14 This is a hydrocarbon group having 11 to 23 carbon atoms. R a15 This refers to hydrocarbon groups with 1 to 3 carbon atoms and HO-(C) groups with a total of 4 to 6 carbon atoms. p H 2p O) r -C q H 2q It is a base that is selected from other bases, m is a number between 1 and 3 (inclusive), p and q are independently numbers of 2 or 3, and r is a number of 0 or 1. R within the same molecule a14 , R a15 If there are multiple instances of p, q, and r, they may be the same or different. Also, R a14 -C(=O)-O-(C p H 2p O) r -C q H 2q The total number of carbon atoms is between 12 and 28.

[0023] R in general formula (a12) a14 The hydrocarbon group has 11 to 23 carbon atoms, and from the viewpoint of making textile products more flexible, an acyclic hydrocarbon group with 13 to 21 carbon atoms is preferred. R a14 Specific examples include groups selected from linear or branched alkyl groups having 13 to 21 carbon atoms, and linear or branched alkenyl groups having 13 to 21 carbon atoms, with groups selected from linear alkyl groups having 13 to 21 carbon atoms and linear alkenyl groups having 13 to 21 carbon atoms being preferred.

[0024] In general formula (a12), p and q are each the number 2 or 3. From the viewpoint of dispersion stability in water, p is preferably 2. From the viewpoint of ease of manufacture, q is preferably 2. In general formula (a12), r is a number of 0 or 1 from the viewpoint of making textile products more flexible, and 0 is preferred. R a15From the standpoint of ease of manufacture, HO-(C p H 2p O) r -C q H 2q A base group, and more preferably an HO-C2H4 group, is preferred. m is preferably between 1 and 2 from the viewpoint of dispersion stability in water.

[0025] R a14 When is an alkenyl group, the unsaturated group contained in the alkenyl group exists in both cis and trans forms. The molar ratio of the cis isomer to the trans isomer [cis / trans] is preferably 30 / 70 or more and 99 / 1 or less, and more preferably 50 / 50 or more and 97 / 3 or less from the viewpoint of the availability of alkenyl groups. In the present invention, the ratio of the cis isomer to the trans isomer is 1 It can be calculated using the integral ratio of H-NMR.

[0026] The (a1-1) component is R in the general formula (a12) above. a14 It is preferable that the mixture is composed of compounds with different substituents, a14 However, it is more preferable that the compound be a mixture of an alkyl group and an alkenyl group. The ratio of alkyl group compounds to alkenyl group compounds can be determined by the composition of the starting fatty acid or fatty acid ester. The amount of alkyl group and alkenyl group can be adjusted by hydrogenation of the starting material containing the alkenyl group, or R a14 This can be achieved by hydrogenating a compound that has an alkenyl group.

[0027] Component (a1-1) is a tertiary amine compound represented by general formula (a12) and its salt, as described above. However, depending on the pH of the rinse water of the present invention, almost all of component (a1-1) may be present in the composition in the form of its salt. (a1-1) When the tertiary amine compound constituting the component exists as an acid salt, examples of acids include inorganic acids or organic acids. Examples of inorganic acids include hydrochloric acid and sulfuric acid. Examples of organic acids include alkyl sulfates having 1 to 3 carbon atoms, monovalent or polyvalent carboxylic acids having 1 to 10 carbon atoms, and monovalent or polyvalent sulfonic acids having 1 to 20 carbon atoms. Specific examples of organic acids include methyl sulfate, ethyl sulfate, p-toluenesulfonic acid, (o-, m-, p-)xylenesulfonic acid, benzenesulfonic acid, dodecylbenzenesulfonic acid, glycolic acid, citric acid, benzoic acid, and salicylic acid. When using the organic carboxylate salt of component (a1-1), the organic carboxylic acid shall be treated as component (c) as described later.

[0028] The method for producing the amine compound represented by general formula (a12), which is component (a1-1), is not particularly limited, but for example, it can be obtained by an esterification reaction between an alkanolamine compound represented by general formula (a13) and a fatty acid, or by a transesterification reaction between an alkanolamine compound represented by general formula (a13) and a fatty acid ester. As the aforementioned fatty acids, fatty acids derived from palm kernel oil, coconut oil, beef tallow, rapeseed oil, and sunflower oil can be used, and the fatty acid ratio may be adjusted, or fatty acids of different origins may be used in combination. [HO-(C p H 2p O) r -C q H 2q ] n N(R a16 ) 3-n (a13) [In the formula, R a16 is a group selected from hydrocarbon groups having 1 to 3 carbon atoms, n is a number between 1 and 3, and p, q, and r have the same meaning as in the general formula (a12) above.

[0029] As an example of an esterification reaction, the method described on pages 8-9 of Japanese Patent Publication No. 2000-510171 can be applied. As an example of a transesterification reaction, the method described in paragraphs

[0013] to

[0016] of Japanese Patent Publication No. 7-138211 can be applied.

[0030] Components (a1-2) are quaternized products of the tertiary amine compound represented by the general formula (a12), and can be obtained by a quaternization reaction using the tertiary amine compound represented by the general formula (a12) and an alkylating agent. Examples of alkylating agents include dimethyl sulfate, diethyl sulfate, methyl chloride, methyl bromide, and methyl iodide, and it is preferable to use one or more selected from methyl chloride, dimethyl sulfate, and diethyl sulfate. Furthermore, if the counterion of the quaternized product is an organic carboxylic acid, the organic carboxylic acid shall be treated as component (c) described later.

[0031] (a2) The component is preferably at least one selected from nonionic surfactants represented by the following general formula (a2). R a21 -A-[(R a22 O) p -R a23 ] q (a2) [In the formula, R a21 R is an alkyl group or alkenyl group having 8 or more carbon atoms, preferably 10 or more, and 24 or less, preferably 18 or less, more preferably 16 or less, and even more preferably 14 or less. a22 R is an alkylene group having 2 or 3 carbon atoms, preferably an ethylene group, a23 A is an alkyl group or hydrogen atom having 1 to 3 carbon atoms, p is the average number of moles added, which is 2 or more, preferably 5 or more, more preferably 10 or more, and 100 or less, more preferably 80 or less, even more preferably 60 or less, even more preferably 50 or less, even more preferably 40 or less, and even more preferably 30 or less, and the addition form may be either random addition or block addition. A is -O-, -COO-, -CONH-, -NH-, -CON< or -N<, and when A is -O-, -COO-, -CONH- or -NH-, q is 1, and when A is -CON< or -N<, q is 2.

[0032] (a2) The nonionic surfactant of component (a2) is preferably one or more nonionic surfactants selected from polyoxyalkylene alkyl ethers having an alkyl group with 8 to 24 carbon atoms and polyoxyalkylene alkenyl ethers having an alkenyl group with 8 to 24 carbon atoms.

[0033] Specific examples of compounds with general formula (a2) include one or more compounds selected from the following formulas (a2-1) to (a2-4). R a21 -O-(C2H4O) r -H (a2-1) [In the formula, R a21 The above has the same meaning. r is the average number of moles added, and is a number that is 8 or more, preferably 10 or more, more preferably 20 or more, and 100 or less, preferably 60 or less, more preferably 40 or less, and even more preferably 30 or less. R a21 -O-(C2H4O) s (C3H6O) t -H (a2-2) [In the formula, R a21 The above has the same meaning. s and t are the average number of moles added, where s is 2 or more, preferably 5 or more, and 40 or less, preferably 30 or less, more preferably 20 or less, and even more preferably 15 or less; t is 1 or more, and 20 or less, preferably 10 or less, more preferably 8 or less, even more preferably 5 or less, and even more preferably 3 or less; (C2H4O) and (C3H6O) may be random or block adducts. R a21 -O-(C2H4O) x1 -(C3H6O) y -(C2H4O) x2 -H (a2-3) [In the formula, R a21 The above has the same meaning. x1, y, and x2 are the average number of moles added, where x1 is between 1 and 13, y is between 1 and 4, and x2 is between 1 and 13. (C2H4O), (C3H6O), and (C2H4O) are block adducts.

[0034] [ka]

[0035] [In the formula, R a21 The same meaning as above applies. B is -N< or -CON<, u and v are the average number of added moles, each independently a number between 0 and 40, and u+v is a number between 5 and 60, preferably 40. a24 , R a25 Each of these is independently either a hydrogen atom or an alkyl group having 1 to 3 carbon atoms.

[0036] Specific examples of nonionic surfactants that do not have an alkylene oxy group, other than the nonionic surfactant represented by the general formula (a2) above, include one or more selected from sucrose fatty acid esters, glycerin fatty acid esters, sorbitan fatty acid esters, alkyl glycosides, and glyceryl monoethers.

[0037] (a3) The anionic surfactant of component (a3) ​​can be one or more selected from alkylbenzene sulfonates, alkyl or alkenyl ether sulfates, alkyl or alkenyl sulfates, olefin sulfons, alkanesulfons, saturated or unsaturated fatty acid salts, alkyl or alkenyl ether carboxylates, α-sulfo fatty acid salts, N-acyl amino acids, phosphate mono or diesters, and sulfosuccinates. The alkyl or alkenyl group of the anionic surfactant has, for example, 8 to 22 carbon atoms. The average number of moles of oxyethylene groups added to the anionic surfactant is, for example, 0 to 10. Examples of counterions to the anionic groups of these anionic surfactants include alkali metal ions such as sodium ions and potassium ions; alkaline earth metal ions such as calcium ions and magnesium ions; ammonium ions; and alkanolammonium ions having 1 to 3 alkanol groups with 2 or 3 carbon atoms (e.g., monoethanolammonium ions, diethanolammonium ions, triethanolammonium ions, triisopropanolammonium ions, etc.).

[0038] (a3) The component is preferably one or more selected from alkylbenzene sulfonates, alkyl or alkenyl ether sulfates, and alkyl or alkenyl sulfates, from the viewpoint of water dispersibility and affinity with fragrance components. The alkyl group of the alkylbenzene sulfonate has 10 or more carbon atoms, preferably 12 or more, and 18 or less, preferably 14 or less, and the alkyl group is preferably linear. The alkyl or alkenyl ether sulfate salt is preferably a polyoxyalkylene alkyl or alkenyl ether sulfate salt. The polyoxyalkylene alkyl or alkenyl ether sulfate salt has an alkyl or alkenyl group with 8 or more carbon atoms, preferably 10 or more, and 18 or less, preferably 14 or less. The polyoxyalkylene alkyl or alkenyl ether sulfate salt has an oxyalkylene group with preferably 2 or 3 carbon atoms, more preferably 2 carbon atoms, and an average number of added moles of oxyalkylene groups of 0.5 or more, more preferably 1.0 or more, and 4.0 or less, preferably 3.0 or less. The number of carbon atoms in the alkyl or alkenyl sulfate salt is 10 or more, preferably 12 or more, and 18 or less, preferably 14 or less.

[0039] (a4) The amphoteric surfactant of component (a4) can be one or more selected from N-alkanoylaminopropyl-N,N-dimethylamine oxide, N-alkyl-N,N-dimethylamine oxide, N-alkanoylaminopropyl-N,N-dimethyl-N-carboxymethylammonium betaine, N-alkyl-N,N-dimethyl-N-carboxymethylammonium betaine, N-alkyl-N,N-dimethyl-N-sulfopropylammonium sulfobetaine, N-alkyl-N,N-dimethyl-N-(2-hydroxysulfopropyl)ammonium sulfobetaine, N-alkanoylaminopropyl-N,N-dimethyl-N-sulfopropylammonium sulfobetaine, and N-alkanoylaminopropyl-N,N-dimethyl-N-(2-hydroxysulfopropyl)ammonium sulfobetaine. In these, the alkanoyl group is, for example, lauroyl or myristyl. In these, the alkyl group is, for example, a lauryl group or a myristyl group.

[0040] The rinse water of the present invention contains component (a) in an amount of 5 ppm or more, preferably 10 ppm or more, more preferably 25 ppm or more, even more preferably 50 ppm or more, and 500 ppm or less, preferably 250 ppm or less, and more preferably 100 ppm or less, from the viewpoint of the adsorption efficiency of fragrance components to textile products and for the purpose of dispersing and emulsifying the fragrance components in the rinse water. In the present invention, if component (a) contains component (a1), the mass of component (a1) shall be the value obtained by converting it to a quaternary compound of a tertiary amine compound using dimethyl sulfuric acid as an alkylating agent. In the present invention, if component (a) contains component (a3), the mass of component (a3) ​​shall be the value obtained by converting it to a sodium salt. Furthermore, in the washing process of the laundry cycle, if washing is performed with a detergent solution containing a surfactant, the surfactant may be carried over during the rinsing process. However, in this invention, such surfactants are also included in the content of component (a) in the rinse water.

[0041] The rinse water of the present invention contains a fragrance as component (b). The fragrance referred to herein is not particularly limited as long as it is one or more selected from fragrances and fragrance precursors. As fragrances, for example, fragrance compounds described in Motoki Nakajima, "Basic Knowledge of Fragrances and Perfuming," 4th edition, Sangyo Tosho Co., Ltd., April 20, 2005, or fragrance compounds known to be incorporated into fabric softeners through patent documents, etc., can be used. The fragrance compound may be a single compound or a mixture of two or more. In addition, fragrance components or fragrance compositions prepared independently by fragrance manufacturers can be used. The fragrance may be a single fragrance compound or a fragrance composition obtained by mixing two or more of the fragrance compounds, and the fragrance composition may contain a fragrance diluent or solvent in addition to the fragrance compound. In addition, fragrance precursors can be used as fragrances. It should be noted that fragrances encapsulated in microcapsules are excluded from component (b) of the present invention.

[0042] (b) When a phenolic fragrance (hereinafter referred to as component (b1)) is included as component (b), the proton dissociation of the hydroxyl group is greatly suppressed, and the effects of the present invention's method for fragrance-applying textile products can be enjoyed to the fullest extent.

[0043] (b1) From the viewpoint of versatility in fragrance composition, the component is preferably one or more fragrances selected from vanillin, ethyl vanillin, eugenol, isoeugenol, carvacrol, and thymol.

[0044] The rinse water of the present invention contains component (b) in a concentration of preferably 0.5 ppm or more, more preferably 1 ppm or more, even more preferably 2 ppm or more, even more preferably 5 ppm or more, and preferably 100 ppm or less, more preferably 50 ppm or less, even more preferably 20 ppm or less, and even more preferably 10 ppm or less, from the viewpoint of imparting appropriate fragrance intensity to textile products.

[0045] In the rinse water of the present invention, when component (b) contains component (b1), the content of component (b1) in component (b) is preferably 3% by mass or more, more preferably 5% by mass or more, even more preferably 7% by mass or more, from the viewpoint of fully enjoying the effects of the present invention, and from the viewpoint of ensuring fragrance palatability, preferably 30% by mass or less, more preferably 25% by mass or less, even more preferably 20% by mass or less, and even more preferably 15% by mass or less.

[0046] The rinse water of the present invention contains an organic carboxylic acid as component (c).

[0047] (c) The molecular weight of component is preferably 60 or more, more preferably 70 or more, even more preferably 80 or more, and preferably 300 or less, more preferably 270 or less, even more preferably 250 or less, and even more preferably 200 or less, from the viewpoint of versatility and water solubility. (c) The valency of the carboxylic acid of component (c) is preferably 1 or higher, preferably 5 or lower, more preferably 4 or lower, and even more preferably 3 or lower, from the viewpoint of water solubility and versatility.

[0048] (c) The components may include one or more selected from lactic acid (MW: 90, monovalent), citric acid (MW: 192, trivalent), malic acid (MW: 134, divalent), oxalic acid (MW: 90, divalent), malonic acid (MW: 104, divalent), succinic acid (MW: 118, divalent), tartaric acid (MW: 150, divalent), glutaric acid (MW: 132, divalent), adipic acid (MW: 146, divalent), fumaric acid (MW: 116, divalent), maleic acid (MW: 116, divalent), and aconitic acid (MW: 174, trivalent). The values ​​in parentheses for each component indicate the molecular weight and the valency of the carboxylic acid.

[0049] (c) Component is preferably one or more selected from lactic acid, citric acid, malic acid, succinic acid, adipic acid, maleic acid, fumaric acid, and malonic acid, more preferably one or more selected from lactic acid, citric acid, malic acid, succinic acid, and fumaric acid, and even more preferably one or more selected from lactic acid, citric acid, and malic acid. In the present invention, citric acid is most preferred.

[0050] The rinse water of the present invention contains component (c) in a concentration of preferably 30 ppm or more, preferably 50 ppm or more, more preferably 75 ppm or more, even more preferably 100 ppm or more, and even more preferably 130 ppm or more, from the viewpoint of fully enjoying the effects of the present invention. From the viewpoint of suppressing damage to textile products and modification of fragrance components, it contains preferably 500 ppm or less, more preferably 400 ppm or less, even more preferably 350 ppm or less, even more preferably 250 ppm or less, and even more preferably 200 ppm or less. The content of component (c) in the rinse water refers to the content of the organic carboxylic acid in its acid form. Furthermore, if component (a) in the rinse water contains an acid salt of an organic carboxylic acid, the organic carboxylic acid contained in the acid salt shall be included in the content of component (c).

[0051] In the rinse water of the present invention, the mass ratio (c) / (a) of the content of component (c) to the content of component (a) is preferably 0.3 or more, more preferably 0.7 or more, even more preferably 1 or more, even more preferably 1.5 or more, and preferably 20 or less, more preferably 15 or less, even more preferably 5 or less, even more preferably 4 or less, even more preferably 3 or less, and even more preferably 2.5 or less. Furthermore, when component (a1) is used as component (a) in the present invention, the mass ratio (c) / (a1) of the content of component (c) to the content of component (a1) is 0.3 or more, preferably 0.7 or more, more preferably 1 or more, even more preferably 1.5 or more, particularly preferably 2.0 or more, and preferably 60 or less, more preferably 20 or less, even more preferably 15 or less, even more preferably 5 or less, even more preferably 4 or less, and even more preferably 3 or less.

[0052] The rinse water of the present invention may contain a water-soluble solvent as component (d) from the viewpoint of maintaining a stable dispersion state. With respect to component (d), "water-soluble" means that 5 g or more dissolves in water at 20°C.

[0053] (d) The water-soluble solvent for component (d) can be one or more water-soluble solvents selected from ethanol, isopropyl alcohol, ethylene glycol, propylene glycol, 2-methyl-2-propanol, ethylene glycol monoethyl ether, ethylene glycol monopropyl ether, ethylene glycol monobutyl ether, diethylene glycol monoethyl ether, diethylene glycol monopropyl ether, diethylene glycol monobutyl ether, diethylene glycol monohexyl ether, propylene glycol monoethyl ether (methylpropylene glycol), propylene glycol monopropyl ether, propylene glycol monobutyl ether, propylene glycol monohexyl ether, dipropylene glycol monoethyl ether, dipropylene glycol monopropyl ether, dipropylene glycol monobutyl ether, triethylene glycol monobutyl ether, 3-methyl-3-methoxybutanol, phenoxyethanol, phenyl glycol, phenyl diglycol, phenoxyisopropanol, dibutylenediglycol, hexylene glycol, and benzyl alcohol. (d) Component is preferably one or more water-soluble solvents selected from ethanol, isopropyl alcohol, propylene glycol, ethylene glycol, phenyl glycol, hexylene glycol, and diethylene glycol monobutyl ether, from the viewpoint of versatility and affinity with hydrophobic components.

[0054] If the rinse water of the present invention contains component (d), component (d) is contained in the rinse water at a concentration of preferably 0.5 ppm or more, preferably 1 ppm or more, more preferably 3 ppm or more, from the viewpoint of dispersion stability of component (b), and preferably 500 ppm or less, more preferably 100 ppm or less, even more preferably 20 ppm or less, and even more preferably 10 ppm or less, from the viewpoint of adsorption to textile products.

[0055] The rinse water of the present invention contains water. The water can be deionized water, sterilized water with a small amount of hypochlorite added to deionized water, tap water, etc. The rinse water of the present invention contains water in the rinse, preferably at a concentration of 90% by mass or more, more preferably 95% by mass or more, even more preferably 99% by mass or more, and preferably 99.995% by mass or less, more preferably 99.99% by mass or less, and even more preferably 99.98% by mass or less.

[0056] The pH of the rinse water of the present invention is 1 or higher, preferably 2 or higher, more preferably 3 or higher, from the viewpoint of damage to textile products and modification of fragrance components, and less than 6, preferably 5.5 or lower, more preferably 5.0 or lower, and even more preferably 4.5 or lower, from the viewpoint of fully enjoying the effects of the present invention. The pH of the rinse water of the present invention may be the pH at 20°C. The pH is measured according to item 8.3 of JIS K 3362;2008. In the rinse water of the present invention, the pH is preferably adjusted by component (c).

[0057] The rinse water of the present invention may, as necessary and within the limits that do not impair the effects of the present invention, further contain other components such as inorganic salts such as calcium chloride, chelating agents such as ethylenediaminetetraacetate and methylglycine diacetate, antioxidants such as BHT, defoaming agents such as polydimethylsiloxane, preservatives known by trade names such as Proxel, dyes, pigments, ultraviolet absorbers, and fragrances encapsulated in microcapsules (except for those falling under components (a), (b), and (c)). In this invention, when chelating agents such as aminocarboxylic acids are used, they shall be treated as component (c).

[0058] The rinse water of the present invention is used as rinse water for textile products in the rinsing process of the washing cycle of textile products to treat textile products. Before treating the textile products with the rinse water of the present invention in the rinsing step, a washing step is performed. In the washing step, the textile products may be treated with a washing solution containing a commercially available detergent composition for textile products.

[0059] The present invention's method for fragrance-applying textile products applies to textile products such as woven fabrics, knitted fabrics, and nonwoven fabrics, as well as products made using these fabrics, including undershirts, T-shirts, dress shirts, blouses, slacks, hats, handkerchiefs, towels, knitwear, socks, underwear, and tights.

[0060] In the method for fragrance-applying textile products of the present invention, the value of the bath ratio, expressed as the ratio of the mass (kg) of the textile product to the volume (liters) of the rinse water of the present invention, that is, the value of the volume (liters) of the rinse water of the present invention / mass (kg) of the textile product, is preferably 2 or more, more preferably 3 or more, even more preferably 4 or more, even more preferably 5 or more, and preferably 45 or less, more preferably 40 or less, even more preferably 30 or less, and even more preferably 20 or less, from the viewpoint of the adsorption efficiency of component (b) to the textile product and uniform adsorption to the entire laundry.

[0061] The method for fragrance-applying textile products according to the present invention is preferably carried out using a washing machine. The rinsing time in the rinsing step is preferably 1 minute or more, more preferably 2 minutes or more, even more preferably 3 minutes or more, and preferably 1 hour or less, more preferably 30 minutes or less, even more preferably 20 minutes or less, and even more preferably 15 minutes or less, from the viewpoint of the efficiency and uniformity of adsorption of component (b) to the textile product.

[0062] After rinsing textile products, they can be dehydrated using a washing machine. Rinsing and dehydration can be performed alternately multiple times. After rinsing and dewatering, drying can be performed. Drying can be done by natural drying or heat drying. Multiple drying cycles can be performed for each method.

[0063] [Methods for enhancing the fragrance of textile products] The present invention provides a method for enhancing the fragrance of textile products, wherein, in the rinsing step of the washing cycle of textile products, a textile product treatment agent composition containing component (a) and component (b), and a fragrance enhancer composition containing component (c) are added to the rinse water, and the textile products are treated with the rinse water having a component content of 5 ppm or more and 500 ppm or less, and a pH of 1 or more and less than 6.

[0064] In the rinsing step of the washing cycle of textile products, the rinsing water is prepared by adding the textile product treatment composition of the present invention and the fragrance enhancer composition of the present invention to the rinsing water, thereby containing component (a), component (b), and component (c), and having a pH of 1 or more and less than 6, i.e., the rinsing water of the present invention. By treating the textile products with this rinsing water, the effectiveness of the fragrance from the textile products, particularly the effectiveness of the fragrance when the textile products become wet due to sweating during use, can be improved compared to when the textile product treatment composition of the present invention is added to the rinsing water alone, thereby enhancing the fragrance of the textile products. In the method for enhancing the fragrance of textile products of the present invention, the rinse water containing the textile product treatment agent composition of the present invention and the fragrance enhancing agent composition of the present invention is the same as the rinse water of the present invention described in the method for enhancing the fragrance of textile products of the present invention, and the embodiments described in the method for enhancing the fragrance of textile products of the present invention can be applied as appropriate. The method for enhancing the fragrance of textile products according to the present invention can be appropriately applied to the embodiments described in the method for enhancing the fragrance of textile products according to the present invention. In the method for enhancing the fragrance of textile products according to the present invention, including the textile product treatment composition and the fragrance enhancing composition of the present invention in the rinse water does not specify the order in which the textile product treatment composition and the fragrance enhancing composition of the present invention are added to the rinse water, and the order in which each composition is added is not limited in any way.

[0065] The textile product treatment agent composition of the present invention contains component (a). (a) The component is the same as in the embodiment described in the method for fragrance-adding textile products of the present invention. The textile product treatment agent composition of the present invention contains component (a) in an amount of 3% by mass or more, preferably 5% by mass or more, more preferably 7% by mass or more, and 25% by mass or less, preferably 20% by mass or less, more preferably 15% by mass or less, and even more preferably 12% by mass or less, from the viewpoint of adsorption efficiency of component (b) and stability of the composition.

[0066] The textile product treatment agent composition of the present invention contains component (b). (b) The component is the same as in the embodiment described in the method for fragrance-adding textile products of the present invention. The textile product treatment agent composition of the present invention contains component (b) in an amount of preferably 0.3% by mass or more, more preferably 0.5% by mass or more, even more preferably 0.7% by mass or more, and preferably 3% by mass or less, more preferably 2% by mass or less, and even more preferably 1.7% by mass or less, from the viewpoint of imparting appropriate fragrance intensity to textile products.

[0067] The textile product treatment agent composition of the present invention may contain component (d). (d) The component is the same as in the embodiment described in the method for fragrance-adding textile products of the present invention. If the textile product treatment agent composition of the present invention contains component (d), component (d) is preferably contained in the textile product treatment agent composition in an amount of 0.3% by mass or more, more preferably 0.5% by mass or more, even more preferably 0.7% by mass or more, and preferably 5% by mass or less, more preferably 4% by mass or less, even more preferably 2.5% by mass or less, and even more preferably 1.5% by mass or less, from the viewpoint of the stability of the composition.

[0068] If the textile product treatment composition of the present invention contains component (c), the content of component (c) is preferably 1% by mass or less, more preferably 0.5% by mass or less, and even more preferably 0.3% by mass or less in the textile product treatment composition. The textile product treatment agent composition of the present invention does not necessarily have to contain component (c). (c) The component is the same as in the embodiment described in the method for fragrance-adding textile products of the present invention.

[0069] The textile product treatment composition of the present invention contains water. The water can be deionized water, sterilized water with a small amount of hypochlorite added to deionized water, tap water, etc. The textile product treatment agent composition of the present invention contains water in an amount of preferably 50% by mass or more, more preferably 60% by mass or more, even more preferably 70% by mass or more, even more preferably 80% by mass or more, and preferably 95% by mass or less, more preferably 90% by mass or less.

[0070] The pH of the textile product treatment composition of the present invention is preferably 1.5 or higher, more preferably 2.0 or higher, and more preferably 7.0 or lower, more preferably 5.0 or lower, and still more preferably 4.0 or lower, from the viewpoint of composition stability. The pH of the textile product treatment composition of the present invention may be the pH at 20°C. The pH is measured according to item 8.3 of JIS K 3362;2008. In the textile product treatment composition of the present invention, the pH is adjusted with an alkaline agent such as sodium hydroxide or an acidic agent such as hydrochloric acid.

[0071] The textile product treatment composition of the present invention may further contain, as necessary, other components (excluding those corresponding to components (a), (b), (c), and (d)) such as inorganic salts such as calcium chloride, chelating agents such as ethylenediaminetetraacetate and methylglycine diacetate, antioxidants such as BHT, defoaming agents such as polydimethylsiloxane, preservatives known by trade names such as Proxel, dyes, pigments, ultraviolet absorbers, and fragrances encapsulated in microcapsules, as long as the effects of the present invention are not impaired.

[0072] The fragrance enhancer composition of the present invention contains component (c). (c) The component is the same as in the embodiment described in the method for fragrance-adding textile products of the present invention. The fragrance enhancer composition of the present invention contains component (c) in an amount of 5% by mass or more, preferably 10% by mass or more, more preferably 15% by mass or more, and 50% by mass or less, preferably 40% by mass or less, and more preferably 30% by mass or less, from the viewpoint of fully enjoying the effects of the present invention.

[0073] The fragrance enhancer composition of the present invention may contain component (a). (a) The component is the same as in the embodiment described in the method for fragrance-adding textile products of the present invention. If the fragrance enhancer composition of the present invention contains component (a), from the viewpoint of the stability of the fragrance enhancer composition, component (a) is preferably contained in the fragrance enhancer composition at a concentration of 1% by mass or more, more preferably 3% by mass or more, even more preferably 5% by mass or more, and preferably 25% by mass or less, more preferably 20% by mass or less, and even more preferably 18% by mass or less.

[0074] The fragrance enhancer composition of the present invention may contain component (b). (b) The component is the same as in the embodiment described in the method for fragrance-adding textile products of the present invention. If the fragrance enhancer composition of the present invention contains component (b), component (b) is preferably contained in the fragrance enhancer composition at a concentration of 0.3% by mass or more, more preferably 0.5% by mass or more, even more preferably 1% by mass or more, and preferably 5% by mass or less, more preferably 4% by mass or less, and even more preferably 3% by mass or less, from the viewpoint of imparting appropriate fragrance intensity to textile products.

[0075] The fragrance enhancer composition of the present invention may contain component (d). (d) The component is the same as in the embodiment described in the method for fragrance-adding textile products of the present invention. If the fragrance enhancer composition of the present invention contains component (d), stability problems such as precipitation of component (c) may occur if used in large quantities. Therefore, the content of component (d) in the fragrance enhancer composition is preferably 15% by mass or less, more preferably 10% by mass or less, and even more preferably 8% by mass or less.

[0076] The fragrance-enhancing composition of the present invention contains water. The water can be deionized water, sterilized water containing a small amount of hypochlorite, tap water, or the like. The fragrance enhancer composition of the present invention contains water in an amount of preferably 50% by mass or more, more preferably 60% by mass or more, even more preferably 70% by mass or more, and preferably 95% by mass or less, preferably 90% by mass or less, and preferably 85% by mass or less.

[0077] The pH of the fragrance enhancer composition of the present invention is preferably 1.5 or higher, more preferably 1.75 or higher, even more preferably 2.0 or higher, and preferably 5.0 or lower, more preferably 4.5 or lower, and even more preferably 4.0 or lower, from the viewpoint of ensuring a predetermined pH when preparing rinse water. The pH of the fragrance enhancer composition of the present invention may be the pH at 20°C. The pH is measured according to item 8.3 of JIS K 3362;2008. In the fragrance enhancer composition of the present invention, the pH is preferably adjusted with an alkaline agent such as sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, and an acidic agent such as hydrochloric acid or sulfuric acid other than component (c).

[0078] The fragrance enhancer composition of the present invention may further contain, as necessary, other components (excluding those corresponding to components (a), (b), (c), and (d)), to the extent that it does not impair the effects of the present invention, such as inorganic salts such as calcium chloride, chelating agents such as ethylenediaminetetraacetate and methylglycine diacetate, antioxidants such as BHT, antifoaming agents such as polydimethylsiloxane, preservatives known by trade names such as Proxel, dyes, pigments, ultraviolet absorbers, and fragrances encapsulated in microcapsules.

[0079] The textile product treatment agent composition and the fragrance enhancer composition of the present invention are added to the rinse water such that the pH of the rinse water is 1 or higher, preferably 2 or higher, more preferably 3 or higher, from the viewpoint of damage to textile products and modification of fragrance components, and less than 6, preferably 5.5 or lower, more preferably 5.0 or lower, and even more preferably 4.5 or lower, from the viewpoint of fully enjoying the effects of the present invention. The pH of the rinse water may be the pH at 20°C. The pH is measured according to item 8.3 of JIS K 3362;2008.

[0080] The textile product treatment agent composition and the fragrance enhancer composition of the present invention are contained in the rinse water such that the mass ratio (c) / (a) of the content of component (c) in the rinse water to the content of component (a) is preferably 0.3 or more, more preferably 0.7 or more, even more preferably 1 or more, even more preferably 1.5 or more, and preferably 20 or less, more preferably 15 or less, even more preferably 5 or less, even more preferably 4 or less, even more preferably 3 or less, and even more preferably 2.5 or less, from the viewpoint of the fragrance preference of the textile product.

[0081] The method of treating textile products with the rinse water of the present invention containing the textile product treatment agent composition and the fragrance enhancer composition of the present invention is the same as the method for fragrance-imparting textile products of the present invention, and the above-mentioned method can be applied as appropriate.

[0082] The present invention provides a method for fragrance-applying textile products, which involves adding a textile product treatment composition 1 containing (a) a surfactant (hereinafter referred to as component (a)) and (b) a fragrance (hereinafter referred to as component (b)) and a textile product treatment agent composition 2 different from textile product treatment composition 1, which contains (c) an organic carboxylic acid (hereinafter referred to as component (c)), to the rinse water during the rinsing step of the washing cycle of textile products, and treating the textile products with the rinse water in which component (a) is contained at a concentration of 5 ppm to 500 ppm and the pH is 1 to less than 6. The present invention provides a method for fragrance-applying to textile products, which can improve the perceived effectiveness of the fragrance from textile products, particularly when the textile products become damp due to sweating or other factors during use. Furthermore, “a different textile product treatment composition 2” means that the content of component (a) and component (b) and any component (c) contained in textile product treatment composition 1 is different from the content of component (c), any component (a) and any component (b) contained in textile product treatment composition 2. Composition 1 for treating textile products may be appropriately adapted to the embodiments described in the above-mentioned composition for treating textile products. Composition 2 for treating textile products may be appropriately adapted to the embodiments described in the above-mentioned composition for enhancing fragrance. Other embodiments may be appropriately adapted to the embodiments described in the above-mentioned method for flavoring textile products or method for enhancing fragrance in textile products. In this case, the composition for treating textile products shall be read as Composition 1 for treating textile products, and the composition for enhancing fragrance shall be read as Composition 2 for treating textile products. [Examples]

[0083] The components used in the examples, comparative examples, and formulation examples are summarized below.

[0084] <(a) Components> (a1) component (a1-1): Reaction mixture obtained in synthesis example a-1 below [Synthesis example a-1: Production of (a1-1)] Triethanolamine and a fatty acid represented by RCOOH were subjected to an esterification reaction at a reaction molar ratio (fatty acid / triethanolamine) of 1.65 / 1 to obtain an esterification reaction product. The esterification reaction product contained 5% by mass of unreacted fatty acid. After a quaternization reaction was carried out with dimethyl sulfate so that the amount of methyl groups was 0.96 equivalent to the amine of the amine compound in the esterification reaction product, ethanol was added. Thus, a reaction product [(a1-1)] containing a quaternary ammonium salt compound [hereinafter referred to as (a1-1-1)] and a tertiary amine compound [hereinafter referred to as (a1-1-2)] as the (a1) component was prepared.

[0085] The composition ratio of each component in the obtained reaction product was analyzed by HPLC method and quantified using tetraoctylammonium bromide as an internal standard substance. As a result, the obtained reaction product (a1-1) was shown as a compound represented by the following general formula (a1-1) and R 14 where R is a methyl group, (a1-1-1) was 76% by mass, and the tertiary amine compound (a1-1-2) shown as a compound having no R 14 group in the following general formula (a1-1) was 12% by mass, ethanol was 10% by mass, unreacted fatty acid was 2% by mass, and it contained a trace amount of triethanolamine quaternized product and other trace components. Also, in the quaternary ammonium salt compound of (a1-1-1), in the general formula (a1-1), R 11 is an acyl group, R 12 and R 13 are hydrogen atoms, R 14 is a methyl group, and X - is methyl sulfate, the compound was 28% by mass. In the general formula (a1-1), R 11 and R 12 are acyl groups, R 13 is a hydrogen atom, R 14 is a methyl group, and X - is methyl sulfate, the compound was 56% by mass. In the general formula (a1-1), R 11 , R 12 and R 13 are acyl groups, R 14 is a methyl group, and X -The compound that is methyl sulfate was 16% by mass. Further, among the tertiary amine compounds of (a1-1-2), in the general formula (a1-1) (herein, in the meaning of the compound having no 14 , R 11 is an acyl group, and the compound in which R 12 and R 13 are hydrogen atoms is substantially not contained. In the general formula (a1-1), the compound in which R 11 and R 12 are acyl groups and R 13 is a hydrogen atom was 17% by mass. In the general formula (a1-1), the compound in which R 11 , R 12 and R 13 are acyl groups was 83% by mass. Also, the quaternization rate of the reactant (a1-1) was 80% by mass.

[0086]

Chemical formula

[0087] The composition of RCOOH used in the reaction for producing (a1-1) is shown below. Palmitic acid: 45% by mass Stearic acid: 25% by mass Oleic acid: 27% by mass Linoleic acid: 3% by mass The above composition was obtained by subjecting the fatty acids used as raw materials to composition analysis by gas chromatography and regarding the area% of each fatty acid as% by mass. The numerical values of the contents in the rinsing water in Tables 2 and 3 are converted into the concentration as the total of (a1-1-1) of the quaternary ammonium salt compound and (a1-1-2) of the tertiary amine compound.

[0088] (a1-2): N-ethyl-N, N-dimethyl-N-tetradecylammonium ethyl sulfate. In the above general formula (a11), the R a11 group is a hydrocarbon group having 14 carbon atoms in total, and the quaternary ammonium salt composed of a tertiary amine in which the R a12 group and the R a13 group are methyl groups and ethyl sulfate

[0089] ·(a2) component (a2-1): Polyoxyethylene lauryl ether, in general formula (a2-1), R a21 R is a linear alkyl group with 12 carbon atoms bonded to an oxygen atom. a21 A nonionic surfactant in which the carbon atoms are primary carbon atoms and r is 30. (a2-2): Polyoxyethylene lauryl ether, in general formula (a2-1) R a21 R is a linear alkyl group with 12 carbon atoms bonded to an oxygen atom. a21 A nonionic surfactant in which the carbon atoms are primary carbon atoms and r is 10. (a2-3): Polyoxypropylene polyoxyethylene lauryl myristyl ether, in general formula (a2-2), R a21 This is a compound having 12 or 14 C12 alkyl groups, with s = 10 and t = 1.5. ·(a3) component (a3-1): Sodium laurylbenzenesulfonate, Neoperex G-15 (manufactured by Kao Corporation)

[0090] <(b) Component> (b-1): Fragrance composition consisting of the fragrance compounds shown in Table 1 below.

[0091] [Table 1]

[0092] <(c) component> (c-1): Citric acid (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.) (c-2): Lactic acid (manufactured by Fujifilm Wako Pure Chemical Corporation) <(d) component> (d-1): Propylene glycol, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.

[0093] [Preparing rinse water] Rinsing water was prepared by adding the following to tap water: a textile product treatment agent composition 1, which contains 8% by mass of component (a1), 2% by mass of component (a2), 1% by mass of component (b), 0.8% by mass of component (d), and the remainder being water, with hydrochloric acid added to adjust the pH to 3.0 at 20°C; a fragrance mixture 1, which is a mixture of components (b) and (d) in a mass ratio of 1:3; and a fragrance enhancer composition 1, which contains 20% by mass of component (c), and the remainder being water, with a pH to 3.0 at 20°C added to adjust the pH to 3.0 at 20°C. The rinse water was prepared by adding these compositions individually or in combination so that the concentration of each component in the rinse water reached the values ​​shown in Table 2, and then stirring for at least 1 minute. In preparing each rinse water, Examples 1 and 2 used textile product treatment composition 1 and fragrance enhancer composition 1, Comparative Example 1 used fragrance mixture 1, Comparative Example 2 used textile product treatment composition 1, and Comparative Example 3 used fragrance mixture 1 and fragrance enhancer composition 1. The pH of each prepared rinse water at 20°C is shown in Table 2. In each rinse water in Table 2, the remainder other than the contained components is water.

[0094] [Evaluation of the effectiveness of the fragrance] Beforehand, 24 towels (100% cotton) were washed twice in a Hitachi NW-6CY fully automatic washing machine using a commercially available mild alkaline detergent (Kao Corporation, Attack), and excess detergent was removed by drying indoors. The washing conditions for each wash were: detergent concentration 0.0667% by mass, 47L of tap water, water temperature 20℃, wash for 10 minutes, rinse twice, and spin dry for 6 minutes. Next, the towels were washed three times using only tap water without detergent, and then dried indoors to remove detergent components such as surfactants carried over from the detergent, thus creating the evaluation towels. The washing conditions for each wash were: detergent concentration 0% by mass, 47L of tap water, water temperature 20℃, washing for 10 minutes, rinsing twice, and spinning for 6 minutes.

[0095] 4.5L of the rinse water described in Table 2, prepared using the method described above, was placed in a Panasonic Corporation electric bucket N-BK2-A. Three evaluation towels prepared using the method described above were then added and agitated for 5 minutes. After that, the towels rinsed with the rinse water were spun dry for 2 minutes in the spin-drying tub of a Hitachi, Ltd. twin-tub washing machine, and then hung on hangers in a room at 20°C and 40% RH to dry for 24 hours.

[0096] The scent of towels after drying was evaluated according to the following criteria. Table 2 shows the results for "after one day of drying". • Criteria for evaluating fragrance intensity (score) 1: Very faintly scented 2: Subtle fragrance (fragrance notes are recognizable) 3. Fragrance (Easily recognizable fragrance notes) 4: Strong fragrance 5: Very strong scent • Evaluation criteria (score) for fragrance expression ability 1: I sense a flat scent. 2: I can sense a variety of scents. 3: Experience a rich variety of fragrances.

[0097] Next, the towels were moistened with 10-20% owf water using a spray bottle and then left undisturbed for a few seconds while folded. After that, the scent of the towel's pile was smelled and evaluated according to the above criteria. Table 2 shows the results for "Water treatment after drying for 1 day".

[0098] Each evaluation was conducted by five panelists specializing in fragrance evaluation, and the average of the scores from these five panelists was used as the final evaluation result.

[0099] [Table 2]

[0100] In the evaluation shown in Table 2, in order to more accurately evaluate the rinse water, the evaluation towels were washed with a detergent solution containing a surfactant, rinsed twice, and dehydrated. Furthermore, to remove any carryover surfactant, they were washed with a detergent solution without a surfactant, rinsed twice, and dehydrated before the rinse water was evaluated. The rinse water of the present invention, which yielded excellent results in this evaluation, will naturally produce the same effects when used as rinse water in the continuous washing and rinsing processes of a laundry cycle.

[0101] [Example prescription] Table 3 shows examples of rinse water formulations of the present invention. In each rinse water in Table 3, the remainder other than the contained components is water. When textile products are treated with the rinse water of each formulation example in Table 3, the effectiveness of the fragrance from the textile products, particularly when the textile products become wet due to perspiration during use, can be improved.

[0102] [Table 3]

Claims

1. A method for fragrance-imparting textile products, comprising treating the textile products with rinse water containing (a) a surfactant (hereinafter referred to as (a) component) in a concentration of 5 ppm to 500 ppm, (b) a fragrance (hereinafter referred to as (b) component), and (c) an organic carboxylic acid (hereinafter referred to as (c) component), and having a pH of 1 to less than 6, during the rinsing step of the washing cycle of textile products.

2. (a) The method for fragrance-adding a textile product according to claim 1, wherein the component is a cationic surfactant.

3. (b) A method for fragrance-adding a textile product according to claim 1 or 2, wherein component (b) contains a phenolic fragrance (hereinafter referred to as component (b1)).

4. (b) The method for fragrance-adding a textile product according to claim 3, wherein the component is one or more fragrances selected from vanillin, ethyl vanillin, eugenol, isoeugenol, carvacrol, and thymol.

5. (c) The method for fragrance-adding a textile product according to claim 1 or 2, wherein the component is one or more organic carboxylic acids selected from lactic acid, citric acid, malic acid, succinic acid, adipic acid, maleic acid, fumaric acid, and malonic acid.

6. The method for fragrance-adding a textile product according to claim 1 or 2, wherein the content of component (c) in the rinse water is 30 ppm or more and 500 ppm or less.

7. The method for fragrance-applying a textile product according to claim 1 or 2, wherein the mass ratio (c) / (a) of the content of component (c) to the content of component (a) in the rinse water is 0.3 or more and 20 or less.

8. A method for enhancing the fragrance of textile products, comprising: in the rinsing step of the washing cycle of textile products, adding a textile product treatment agent composition containing (a) a surfactant (hereinafter referred to as component (a)) and (b) a fragrance (hereinafter referred to as component (b)), and a fragrance enhancer composition containing (c) an organic carboxylic acid (hereinafter referred to as component (c)) to the rinse water, and treating the textile products with the rinse water in which the content of component (a) is 5 ppm or more and 500 ppm or less, and the pH is 1 or more and less than 6.

9. The method for enhancing the fragrance of a textile product according to claim 8, wherein the mass ratio (c) / (a) of the content of component (c) to the content of component (a) in the rinse water is 0.3 or more and 20 or less.

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