Liquid fabric softener composition

Abstract

To provide a liquid softener composition having good deodorant performance and capable of suppressing liquid separation and a mottled appearance.SOLUTION: There is provided a liquid softener composition which comprises the following components (A) to (C): (A) at least one compound selected from the group consisting of an amine compound having 1 to 3 hydrocarbon groups having 10 to 26 carbon atoms in the molecule which is separated by an ester group (-COO-) and / or an amide group (-NHCO-), a salt thereof and a quaternized product thereof; (B) a specific quaternary ammonium salt and (C) a nonionic polymer having a urethane skelton, wherein the content of the component (B) is 1 mass% or less. The component (B) specifically includes hexadecyl trimethylammonium chloride, tetradecyltrimethylammonium chloride, cetylpyridinium chloride or the like.SELECTED DRAWING: None

Description

【Technical Field】 【0001】 The present invention relates to a liquid fabric softener composition. More specifically, it relates to a liquid fabric softener composition having good deodorizing performance and capable of suppressing liquid separation and appearance on spots. 【Background Art】 【0002】 In recent years, the market scale of fabric softeners in Japan has been on an expanding trend, and among them, the share of fabric softeners having a deodorizing function has been growing year by year. On the other hand, many of the current deodorizing technologies rely on masking by fragrance, and there are concerns about problems such as smell harassment. Therefore, there is a need for a deodorizing technology that does not rely on fragrance. As specific examples of such prior arts, a technology of blending a specific cationic surfactant, a quaternary ammonium salt, and a nonionic surfactant in specific amounts, and a technology of blending a specific quaternary ammonium salt and a β-glucuronidase inhibitor are known (Patent Documents 1 and 2). Also, in the field of liquid fabric softeners, technologies of blending a quaternary ammonium salt for the purpose of improving freeze-thaw recovery, improving the dispersibility of encapsulated fragrances, suppressing the precipitation of solids due to exposure to sunlight, and maintaining a transparent appearance are known (Patent Documents 3 to 7). 【Prior Art Documents】 【Patent Documents】 【0003】 【Patent Document 1】 Japanese Patent Application Laid-Open No. 2019-131943 【Patent Document 2】 Japanese Patent Application Laid-Open No. 2016-65341 【Patent Document 3】 Japanese Patent Application Laid-Open No. 2015-4145 【Patent Document 4】 Japanese Patent Application Laid-Open No. 2015-34371 【Patent Document 5】 Japanese Patent Application Laid-Open No. 2013-133547 【Patent Document 6】 Japanese Patent Application Laid-Open No. 2014-125692 【Patent Document 7】 Japanese Patent Application Laid-Open No. 2019-94581 [Overview of the Initiative] [Problems that the invention aims to solve] 【0004】 As a deodorizing technology that does not rely on fragrance, one possibility is to use antibacterial agents to suppress the growth of bacteria during washing and drying. However, when combining cationic surfactants, which provide flexibility, with antibacterial agents (specific quaternary ammonium salts) that provide deodorizing and antibacterial properties, a new challenge has been discovered: it is extremely difficult to achieve both stability and performance in the formulation, resulting in liquid separation and a mottled appearance. Therefore, the object of the present invention is to provide a liquid fabric softener composition that has good deodorizing performance and can suppress liquid separation and a patchy appearance. [Means for solving the problem] 【0005】 As a result of diligent research, the inventors have found that the above problem can be solved by incorporating a urethane-based nonionic polymer into a liquid fabric softener composition that mainly consists of a cationic surfactant and contains a specific quaternary ammonium salt. The present invention relates, for example, to the following [1] to [7]. [1] The following components (A) to (C): (A) At least one compound selected from the group consisting of amine compounds having 1 to 3 hydrocarbon groups with 10 to 26 carbon atoms in the molecule, separated by an ester group (-COO-) and / or an amide group (-NHCO-), salts thereof, and quaternary compounds thereof; (B) At least one quaternary ammonium salt selected from the following components (B-1) and (B-2); (B-1) Component Quaternary ammonium salts represented by general formula (B1) [ka] (In the formula, R 1 R is a hydrocarbon group having 8 to 18 carbon atoms. 2 , R 3 and R 4(where X is an independent alkyl group having 1 to 3 carbon atoms, or a hydroxyalkyl group having 1 to 3 carbon atoms, and X represents an anion.) (B-2) Component Quaternary ammonium salts represented by general formula (B2) [ka] (In the formula, R 5 (where X is a hydrocarbon group with 8 to 18 carbon atoms, and X represents an anion.) and (C) Nonionic polymer having a urethane skeleton A liquid fabric softener composition containing (B) and having a content of 1% by mass or less. [2] The liquid softener composition according to [1], wherein the content of component (A) is 4% by mass or more and less than 13% by mass. [3] (D) The liquid softener composition according to [1] or [2], further comprising a highly branched cyclic dextrin. [4] If the component (B-1) is present, R in formula (B1) 1 If is a hydrocarbon group having 12 to 16 carbon atoms and contains component (B-2), then R in formula (B2) 5 A liquid softener composition according to any one of the above [1] to [3], wherein is a hydrocarbon group having 12 to 16 carbon atoms. [5] A liquid softener composition according to any one of the above items [1] to [4], wherein if it contains component (B-1), the content of component (B-1) is 0.01 to 1% by mass, and if it contains component (B-2), the content of component (B-2) is 0.001 to 0.5% by mass. [6] A liquid softener composition according to any one of the above items [1] to [5], wherein the content of component (C) is 0.001 to 0.1% by mass. [7] (E) A liquid fabric softener composition according to any one of the above items [1] to [6], further containing 1 to 5% by mass of a nonionic surfactant. [Effects of the Invention] 【0006】 The liquid fabric softener composition of the present invention provides good deodorizing properties and suppresses liquid separation and a mottled appearance. The mottled appearance is a state of the liquid that can be visually confirmed after storage of the liquid fabric softener composition, and is an indicator different from simple liquid separation. [Modes for carrying out the invention] 【0007】 The present invention will be described in detail below. 【0008】 [(A) component] Component (A) is a cationic surfactant, which is "at least one compound selected from the group consisting of amine compounds having 1 to 3 hydrocarbon groups with 10 to 26 carbon atoms separated by an ester group (-COO-) and / or an amide group (-NHCO-), salts thereof, and quaternary derivatives thereof." (A) Component is a softening base material and is added to the liquid softener composition to impart the effect of providing softness (texture) to textile products. 【0009】 The number of carbon atoms in the hydrocarbon group having 10 to 26 carbon atoms (hereinafter also referred to as the "long-chain hydrocarbon group") is preferably 17 to 26, and more preferably 18 to 24. A carbon number of 10 or more provides a good flexibility-imparting effect, while a carbon number of 26 or less provides good handling properties for the liquid softener composition. The long-chain hydrocarbon group may be saturated or unsaturated. If the long-chain hydrocarbon group is unsaturated, the position of the double bond may be anywhere, but if there is only one double bond, it is preferable that the double bond be located in the center or around the center of the long-chain hydrocarbon group. The long-chain hydrocarbon group may be a linear hydrocarbon group or a hydrocarbon group containing a ring in its structure, and is preferably a linear hydrocarbon group. The linear hydrocarbon group may be linear or branched. The linear hydrocarbon group is preferably an alkyl group or an alkenyl group, and more preferably an alkyl group. The long-chain hydrocarbon group is interrupted by a cleaving group. The interruption may occur at one location or at two or more locations. Preferably, it occurs at one location. The cleavage group is an ester group (-COO-) or an amide group (-NHCO-). When the long-chain hydrocarbon group has two or more cleavage groups, each cleavage group may be the same or different. The carbon atoms contained in the cleavage group shall be counted as part of the carbon number of the long-chain hydrocarbon group. The long-chain hydrocarbon group is usually introduced by using industrially used tallow-derived unhydrogenated fatty acids, fatty acids obtained by hydrogenating or partially hydrogenating the unsaturated part, unhydrogenated fatty acids or fatty acid esters derived from plants such as palm coconut and oil coconut, or fatty acids or fatty acid esters obtained by hydrogenating or partially hydrogenating the unsaturated part, etc. In the "amine compound having 1 to 3 long-chain hydrocarbon groups having 10 to 26 carbon atoms in the molecule and being segmented by an ester group (-COO-) or an amide group (-NHCO-) (hereinafter sometimes referred to as "amine compound" in this specification)", the number of long-chain hydrocarbon groups is 1 to 3. Preferably 2 (secondary amine compound) or 3 (tertiary amine compound), more preferably 3. 【0010】 Examples of the amine compound include compounds represented by the following general formula (A1). [Chemical formula] (In the formula, R 1 ~R 3 are each independently, -CH2CH(Y)OCOR 4 (Y is a hydrogen atom or CH3, and R 4 is a hydrocarbon group having 7 to 21 carbon atoms), -(CH2) n NHCOR 5 (n is 2 or 3, and R 5 is a hydrocarbon group having 7 to 21 carbon atoms), a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, -CH2CH(Y)OH (Y is a hydrogen atom or CH3), or, -(CH2) n NH2 (n is 2 or 3), and R 1 ~R 3 at least one of is -CH2CH(Y)OCOR 4 and / or -(CH2)n NHCOR 5 (That is the case.) The base "-CH2CH(Y)OCOR" in general formula (A1) 4 In this context, hydrogen atoms are preferred for Y. R 4 As such, a hydrocarbon group having 15 to 19 carbon atoms is preferred. R in the compound represented by general formula (A1) 4 When there are multiple R 4 They may be identical to each other, or they may be different to each other. R 4 The hydrocarbon group is a fatty acid (R) with 8 to 22 carbon atoms. 4 It is a residue (fatty acid residue) obtained by removing the carboxyl group from COOH, R 4 The fatty acids that form the basis of (R 4 COOH) may be a saturated or unsaturated fatty acid, and may be a straight-chain or branched fatty acid. Among these, saturated or unsaturated straight-chain fatty acids are preferred. In order to impart good water absorption to softened clothing, R 4 The saturated / unsaturated ratio (mass ratio) of the fatty acids that form the basis is preferably 90 / 10 to 0 / 100, more preferably 90 / 10 to 40 / 60, and particularly preferably 90 / 10 to 70 / 30. R 4 When is an unsaturated fatty acid residue, both cis and trans isomers exist, but the mass ratio of the cis / trans isomer is preferably 40 / 60 to 100 / 0, and particularly preferably 70 / 30 to 90 / 10. R 4 Specifically, examples of fatty acids that serve as the basis for this include stearic acid, palmitic acid, myristic acid, lauric acid, oleic acid, elaidic acid, linoleic acid, partially hydrogenated palm oil fatty acids (iodine value 10-60), and partially hydrogenated beef tallow fatty acids (iodine value 10-60). In particular, it is preferable to use a fatty acid composition prepared by combining two or more types selected from stearic acid, palmitic acid, myristic acid, oleic acid, elaidic acid, and linoleic acid in predetermined amounts, so as to satisfy the following conditions (a) to (c). (a) The ratio (mass ratio) of saturated fatty acids to unsaturated fatty acids is 90 / 10 to 0 / 100, more preferably 90 / 10 to 40 / 60, and particularly preferably 90 / 10 to 70 / 30. (b) The ratio (mass ratio) of the cis / trans isomer is 40 / 60 to 100 / 0, more preferably 70 / 30 to 90 / 10. (c) Fatty acids with 18 carbon atoms make up 60% by mass or more, preferably 80% by mass or more, fatty acids with 20 carbon atoms make up less than 2% by mass, and fatty acids with 21 to 22 carbon atoms make up less than 1% by mass. In general formula (A1), the base "-(CH2) n NHCOR 5 In this context, 3 is preferred for n. R 5 As such, a hydrocarbon group having 15 to 19 carbon atoms is preferred. R in the compound represented by general formula (A1) 5 When there are multiple R 5 They may be identical to each other, or they may be different to each other. R 5 For example, R 4 Similar examples can be specifically cited. 【0011】 In general formula (A1), R 1 ~R 3 Of these, at least one is -CH2CH(Y)OCOR 4 and / or (CH2) n NHCOR 5 ) is R 1 ~R 3 Two of them are -CH2CH(Y)OCOR 4 and / or (CH2) n NHCOR 5 ) is preferable. R 1 ~R 3 One or two of them are -CH2CH(Y)OCOR 4 and / or (CH2) n NHCOR 5 ) If so, the remaining two or one is a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, -CH2CH(Y)OH (where Y is a hydrogen atom or CH3), or -(CH2)n It is NH2 (where n is 2 or 3), an alkyl group having 1 to 4 carbon atoms, -CH2CH(Y)OH, or -(CH2) n It is preferable that it be NH2. Here, the alkyl group having 1 to 4 carbon atoms is preferably a methyl group or an ethyl group, and a methyl group is particularly preferred. In -CH2CH(Y)OH, Y is -CH2CH(Y)OCOR 4 It is the same as Y inside. -(CH2) n In NH2, n is -(CH2) n NHCOR 5 It is the same as n inside. 【0012】 Preferred examples of compounds represented by general formula (A1) include tertiary amine compounds represented by the following general formulas (A1-1) to (A1-7). [ka] In each of the formulas ((A1-1) to (A1-7), R 9 Each of these is independently a hydrocarbon group having 7 to 21 carbon atoms, and in formulas (A1-6) to (A1-7), R 10 Each of these is independently a hydrocarbon group having 7 to 21 carbon atoms. 【0013】 R 9 and R 10 As for the hydrocarbon group having 7 to 21 carbon atoms in the above general formula (A1), R 4 Examples include hydrocarbon groups having 7 to 21 carbon atoms, and preferably alkyl and alkenyl groups having 15 to 17 carbon atoms. Note that the general formula contains R 9 When there are multiple R 9 They may be identical to each other, or they may be different to each other. 【0014】 Component (A) may be a salt of an amine compound. Salts of amine compounds are obtained by neutralizing the amine compound with an acid. The acid used for neutralization can be either an organic or inorganic acid, such as hydrochloric acid, sulfuric acid, or methyl sulfuric acid. Neutralization of amine compounds can be carried out by known methods. Quaternary compounds of amine compounds are obtained by reacting the amine compound with a quaternizing agent. Examples of quaternizing agents include alkyl halides such as methyl chloride and dialkyl sulfates such as dimethyl sulfate. When these quaternizing agents are reacted with an amine compound, the alkyl group of the quaternizing agent is introduced to the nitrogen atom of the amine compound, and a salt of a quaternary ammonium ion and a halogen ion or monoalkyl sulfate ion is formed. The alkyl group introduced by the quaternizing agent is preferably an alkyl group having 1 to 4 carbon atoms, more preferably a methyl group or an ethyl group, and particularly preferably a methyl group. Quaternary amine compounds can be carried out by known methods. 【0015】 Compounds represented by general formulas (A1) and (A1-1) to (A1-7), their salts, and their quaternary derivatives may be commercially available or prepared by known methods. For example, the compound represented by general formula (A1-1) (hereinafter referred to as "compound (A1-1)") and the compound represented by general formula (A1-2) (hereinafter referred to as "compound (A1-2)") are R of general formula (A1). 4 It can be synthesized by a condensation reaction between the fatty acid composition described in the section above, or a fatty acid methyl ester composition obtained by replacing the fatty acids in the fatty acid composition with methyl esters of those fatty acids, and methyldiethanolamine. In this case, from the viewpoint of providing good flexibility, it is preferable to synthesize it so that the abundance ratio represented by "compound (A1-1) / compound (A1-2)" is 99 / 1 to 50 / 50 by mass ratio. Furthermore, when using the quaternized compound, it is more preferable to use dimethyl sulfuric acid as the quaternizing agent. In this case, from the viewpoint of imparting flexibility, it is preferable to synthesize the compound such that the ratio of "quaternized compound (A1-1) / quaternized compound (A1-2)" is 99 / 1 to 50 / 50 by mass ratio. 【0016】 Compounds represented by general formula (A1-3) (hereinafter referred to as "compound (A1-3)"), compounds represented by general formula (A1-4) (hereinafter referred to as "compound (A1-4)"), and compounds represented by general formula (A1-5) (hereinafter referred to as "compound (A1-5)") are R of general formula (1) 4It can be synthesized by a condensation reaction between a fatty acid composition or fatty acid methyl ester composition described in the section and triethanolamine. In this case, from the viewpoint of imparting flexibility, the content ratio of each component to the total mass of compounds (A1-3), (A1-4), and (A1-5) is preferably 1 to 60% by mass for compound (A1-3), 5 to 98% by mass for compound (A1-4), and 0.1 to 40% by mass for compound (A1-5), and more preferably 30 to 60% by mass for compound (A1-3), 10 to 55% by mass for compound (A1-4), and 5 to 35% by mass for compound (A1-5). Furthermore, when using the quaternized compounds, it is more preferable to use dimethyl sulfuric acid as the quaternizing agent in order to allow the quaternization reaction to proceed sufficiently. From the viewpoint of imparting flexibility, the preferred mass ratio of the quaternized compounds of compounds (A1-3), (A1-4), and (A1-5) is 1 to 60% by mass of the quaternized compound (A1-3), 5 to 98% by mass of the quaternized compound (A1-4), and 0.1 to 40% by mass of the quaternized compound (A1-5). More preferably, the preferred ratio is 30 to 60% by mass of the quaternized compound (A1-3), 10 to 55% by mass of the quaternized compound (A1-4), and 5 to 35% by mass of the quaternized compound (A1-5). When compounds (A1-3), (A1-4), and (A1-5) are quaternized, unquaternized esteramines generally remain after the quaternization reaction. In this case, the ratio of "quaternized product / unquaternized esteramine" is preferably within the mass ratio range of 70 / 30 to 99 / 1. 【0017】 Compounds represented by general formula (A1-6) (hereinafter referred to as "compound (A1-6)") and compounds represented by general formula (A1-7) (hereinafter referred to as "compound (A1-7)") are R of general formula (1) 4It can be synthesized by a condensation reaction between the fatty acid composition described in the section above and N-(2-hydroxyethyl)-N-methyl-1,3-propylenediamine, which is synthesized by a known method described in J.Org.Chem.,26,3409(1960) from an adduct of N-methylethanolamine and acrylonitrile. In this case, it is preferable to synthesize it so that the abundance ratio expressed as "compound (A1-6) / compound (A1-7)" is 99 / 1 to 50 / 50 by mass ratio. Furthermore, when using the quaternary compound, it is preferable to use methyl chloride as the quaternizing agent, and it is preferable to synthesize it so that the abundance ratio expressed as "quaternary compound (A1-6) / quaternary compound (A1-7)" is 99 / 1 to 50 / 50 by mass ratio. 【0018】 (A) Components include: Preferably, at least one compound selected from the group consisting of compounds represented by general formula (A1), salts thereof, and quaternary compounds thereof, More preferably, at least one compound selected from the group consisting of compounds represented by general formulas (A1-1) to (A1-7), their salts, and their quaternary derivatives, A more preferable option is at least one compound selected from the group consisting of compounds represented by general formulas (A1-3) to (A1-5), their salts, and their quaternary derivatives. 【0019】 (A) The components are known substances, readily available on the market, or can be prepared. (A) Component may be a single type or a combination of multiple types (for example, a mixture of compounds represented by general formulas (A1-3) to (A1-5)). The amount of component (A) is not particularly limited as long as it is sufficient to achieve the purpose of formulation, but is preferably 4% by mass or more and less than 13% by mass, more preferably 6 to 12% by mass, and even more preferably 8 to 12% by mass, relative to the total mass of the liquid softener composition. If the amount of component (A) is 4% by mass or more, better softness can be imparted, and if the amount of component (A) is less than 13% by mass, the thickening of the liquid softener composition is suppressed, ensuring better stability. 【0020】 [(B) Component] Component (B) is at least one quaternary ammonium salt selected from components (B-1) and (B-2) below. In the liquid fabric softener composition of the present invention, component (B) is added to impart deodorizing and antibacterial properties. 【0021】 <(B-1) component> Component (B-1) is a quaternary ammonium salt represented by the general formula (B1). [ka] (In the formula, R 1 R is a hydrocarbon group having 8 to 18 carbon atoms. 2 , R 3 and R 4 (where X is an independent alkyl group having 1 to 3 carbon atoms, or a hydroxyalkyl group having 1 to 3 carbon atoms, and X represents an anion.) 【0022】 In equation (B1), R 1 R is preferably a hydrocarbon group having 12 to 16 carbon atoms, and more preferably a hydrocarbon group having 16 carbon atoms. 1 The hydrocarbon group may be saturated or unsaturated, and may be a straight chain or a branched chain. In equation (B1), R 2 , R 3 and R 4 Specific examples include methyl groups, ethyl groups, and hydroxyethyl groups, with methyl groups being preferred. In formula (B1), X can be methyl sulfate, bromine, chlorine, etc., with chlorine being preferred. (B-1) Component is a known substance, readily available on the market, or can be prepared. Specific examples of component (B-1) include, but are not limited to, hexadecyltrimethylammonium chloride, tetradecyltrimethylammonium chloride, and dodecyltrimethylammonium chloride. 【0023】 Component (B-2) is a quaternary ammonium salt represented by the general formula (B2). TIFF0007875675000006.tif32157 (in the formula, R 5 (where X is a hydrocarbon group with 8 to 18 carbon atoms, and X represents an anion.) 【0024】 In equation (B2), R 5 Preferably, it is an alkyl group or alkenyl group having 8 to 18 carbon atoms, more preferably an alkyl group having 12 to 18 carbon atoms, and even more preferably an alkyl group having 16 carbon atoms. (B-2) Component is a known substance, readily available on the market, or can be prepared. (B-2) A specific example of component (B-2) is cetylpyridinium chloride, but it is not limited to this. 【0025】 (B) Component may be a single type or multiple types may be used in combination. (B) The amount of component is 1% by mass or less, preferably 0.001 to 1% by mass, relative to the total mass of the liquid fabric softener composition. When the amount of component is 1% by mass or less, the effect of suppressing liquid separation and mottled appearance is good. When the amount of component is 0.001% by mass or more, it is possible to impart better deodorizing and antibacterial effects. The amount of component (B-1) is preferably 0.01 to 1% by mass, more preferably 0.1 to 0.8%, and even more preferably 0.1 to 0.5%, relative to the total mass of the liquid fabric softener composition. If the amount of component (B-1) is 0.01% by mass or more, better deodorizing and antibacterial effects can be imparted. If the amount of component (B-1) is 1% by mass or less, good effects in suppressing liquid separation and mottled appearance are achieved. The amount of component (B-2) is preferably 0.001 to 0.5% by mass, more preferably 0.01 to 0.3% by mass, and even more preferably 0.02 to 0.2% by mass, relative to the total mass of the liquid fabric softener composition. If the amount of component (B-2) is 0.001% by mass or more, better deodorizing and antibacterial effects can be imparted. If the amount of component (B-2) is 0.5% by mass or less, the effect of suppressing liquid separation and mottled appearance is further improved. 【0026】 In the liquid fabric softener composition of the present invention, the mass ratio A / B of component (A) to component (B) is not particularly limited, but is preferably 10 to 1000. When A / B is in the range of 10 to 1000, higher deodorizing properties can be obtained while maintaining better effects in suppressing liquid separation and mottled appearance. When a certain amount of component (B) is incorporated into the liquid fabric softener composition, it acts on the vesicle film and may affect stability, so a larger A / B ratio can be obtained to better suppress liquid separation and mottled appearance. On the other hand, the larger the amount of component (B) incorporated, i.e., the smaller the A / B ratio, the better the deodorizing properties. In the liquid fabric softener composition of the present invention, the mass ratio A / B-1 of component (A) to component (B-1) is not particularly limited, but is preferably 10 to 200, more preferably 20 to 100, and even more preferably 20 to 50. When A / B-1 is in the range of 10 to 200, higher deodorizing properties can be obtained while maintaining a better effect in suppressing liquid separation and mottled appearance. When a certain amount of component (B-1) is incorporated into the liquid fabric softener composition, it acts on the vesicle film and may affect stability, so the larger A / B-1 is, the better the effect in suppressing liquid separation and mottled appearance can be obtained. On the other hand, the larger the amount of component (B-1) incorporated, i.e., the smaller A / B-1 is, the better the deodorizing properties. In the liquid fabric softener composition of the present invention, the mass ratio A / B-2 of component (A) to component (B-2) is not particularly limited, but is preferably 20 to 1000, more preferably 30 to 500, and even more preferably 50 to 250. When A / B-2 is in the range of 20 to 1000, higher deodorizing properties can be obtained while maintaining a better effect in suppressing liquid separation and mottled appearance. When a certain amount of component (B-2) is incorporated into the liquid fabric softener composition, it acts on the vesicle film and may affect stability, so the larger A / B-2 is, the better the effect in suppressing liquid separation and mottled appearance can be obtained. On the other hand, the larger the amount of component (B-2) incorporated, i.e., the smaller A / B-2 is, the better the deodorizing properties. 【0027】 [(C) component] Component (C) is a nonionic polymer having a urethane skeleton. In the liquid softener composition of the present invention, component (C) is added to provide the effect of suppressing liquid separation and mottled appearance. Component (C) may also be added to provide structural viscosity. Component (C) is preferably a nonionic polymer having hydrophobic groups at its molecular ends and a urethane skeleton inside the molecule. This polymer has repeating structural units containing urethane bonds in its main chain. Molecular ends can be both ends of the molecule. In particular, component (C) can be a nonionic polymer having hydrophobic groups at both ends of the molecule and hydrophilic groups and a urethane skeleton inside the molecule. Such a component (C) can be a rheology modifier. One mechanism by which component (C) functions as a rheological modifier is the formation of aggregates. For example, hydrophobic groups in component (C) may associate with vesicle particles formed by component (A) (a structure formed by linking vesicle particles via component (C) is called a bridging structure), and / or hydrophobic groups in component (C) may associate with each other. (C) The hydrophobic groups that component (C) may have are not particularly limited, but include, for example, linear, branched, or cyclic hydrocarbon groups such as alkyl groups and cycloalkyl groups, and optionally substituted aryl groups and arylalkyl groups. (C) The hydrophilic groups that component may have are not particularly limited, but examples include polyoxyalkylene and polyoxyalkene. 【0028】 (C) Component may be a commercially available product or one manufactured by a known method. (C) Examples of commercially available products containing this component include, for example, RHEOBYK-H 7625 VF (formerly OPTIFLO-H 7625 VF), RHEOBYK-H 7500 VF (formerly OPTIFLO-H 7500 VF), RHEOBYK-H 6500 VF (formerly OPTIFLO-H 6500 VF), RHEOBYK-H 3300 VF (formerly OPTIFLO-H 3300 VF), RHEOBYK-M 2600 VF (formerly OPTIFLO-M 2600 VF), RHEOBYK-L 1400 VF (formerly OPTIFLO-L 1400 VF) from Big Chemie Japan Co., Ltd., and Aculyn 44, Acusol 880, and Acusol from Dow Chemical Japan Ltd. Examples include, but are not limited to, the 882, and the BASF Rheovis PU1190 and Rheovis PU1341. One example of a method for producing component (C) is to react a polyol with an excess amount of diisocyanate to form a prepolymer having isocyanate groups at both ends, and then produce component (C) using a mixture of a monoamine (e.g., a primary monolong-chain amine) and a diamine having a hydrophobic structure. Possible polyols include polyether polyols such as polyethylene glycol and polypropylene glycol, polyester polyols, etc., and the polyol constitutes the hydrophilic group in component (C). Possible monoamines include aliphatic amines, arylaliphatic amines, and aromatic amines. Component (C) can also be produced from a polyol, diisocyanate, and an alcohol having a hydrophobic structure. The method for producing component (C) is not limited to these. The mass-average molecular weight of component (C) is not particularly limited, but may be, for example, 1,000 to 1,000,000, preferably 2,000 to 500,000, and more preferably 5,000 to 300,000. (C) Component may be used alone or in combination of two types. The amount of component (C) is not particularly limited as long as it is sufficient to achieve the purpose of formulation, but is preferably 0.001 to 0.1% by mass, more preferably 0.002 to 0.05% by mass, and even more preferably 0.003 to 0.03% by mass, relative to the total mass of the liquid softener composition. When the amount of component (C) is 0.001% by mass or more, the effect of suppressing liquid separation and mottled appearance is further improved, and when the amount of component (C) is 0.1% by mass or less, the usability is further improved. In the present invention, the amount of component (C) is advantageous in that excellent effects can be obtained even with such a small amount. Furthermore, when component (D) below is further added to the liquid fabric softener composition, the effect of suppressing liquid separation and mottled appearance can be obtained well even if the amount of component (C) is further reduced. For example, when component (D) below is further added to the liquid fabric softener composition, the amount of component (C) may be greater than 0 to 0.1% by mass, preferably greater than 0 to 0.05% by mass, and more preferably 0.001 to 0.03% by mass. In the liquid fabric softener composition of the present invention, the mass ratio B / C of component (B) to component (C) is not particularly limited, but is preferably 1 to 500. When a certain amount of component (C) is incorporated into the liquid fabric softener composition, it suppresses the aggregation of vesicle particles and improves stability. Therefore, a smaller B / C ratio results in a better effect in suppressing liquid separation and mottled appearance, while a larger B / C ratio results in better usability. In the liquid fabric softener composition of the present invention, the mass ratio B-1 / C of component (B-1) to component (C) is not particularly limited, but is preferably 1 to 300, more preferably 5 to 200, and even more preferably 10 to 100. When B-1 / C is in the range of 1 to 300, the effect of suppressing liquid separation and mottled appearance is better maintained while also providing good usability. When a certain amount of component (C) is incorporated into the liquid fabric softener composition, it suppresses the aggregation of vesicle particles and works to improve stability, so the smaller the B-1 / C, the better the effect of suppressing liquid separation and mottled appearance can be obtained. On the other hand, the smaller the amount of component (C) incorporated, i.e., the larger the B-1 / C, the better the usability. In the liquid fabric softener composition of the present invention, the mass ratio B-2 / C of component (B-2) to component (C) is not particularly limited, but is preferably 1 to 100, more preferably 2 to 50, and even more preferably 3 to 30. When B-2 / C is in the range of 1 to 100, the effect of suppressing liquid separation and mottled appearance is better maintained while also providing good usability. When a certain amount of component (C) is incorporated into the liquid fabric softener composition, it suppresses the aggregation of vesicle particles and works to improve stability, so the smaller the B-2 / C, the better the effect of suppressing liquid separation and mottled appearance can be obtained. On the other hand, the smaller the amount of component (C) incorporated, i.e., the larger the B-2 / C, the better the usability. 【0029】 [(D) component] The liquid fabric softener composition of the present invention may further contain highly branched cyclic dextrin as component (D). In the liquid fabric softener composition of the present invention, component (D) may be added to further improve the effect of suppressing liquid separation and mottled appearance, further improve deodorizing properties, and / or impart structural viscosity. Highly branched cyclic dextrin is a glucan having an internally branched cyclic structure and an externally branched structure, with a degree of polymerization ranging from 50 to 10,000, wherein the internally branched cyclic structure is a cyclic structure formed by α-1,4-glucosidic bonds and α-1,6-glucosidic bonds, and the externally branched structure is an acyclic structure bonded to the internally branched cyclic structure. In the liquid softener composition of the present invention, the highly branched cyclic dextrin that can be incorporated as component (D) mainly comprises dextrin with a weight-average molecular weight of about 30,000 to 1,000,000, having one cyclic structure within the molecule, and further having numerous glucan chains bonded to the cyclic portion, with a weight-average degree of polymerization of about 2,500. In the liquid softener composition of the present invention, the internally branched cyclic structure portion of the highly branched cyclic dextrin that can be incorporated as component (D) is composed of about 10 to 100 glucose units, and an externally branched structure portion consisting of numerous acyclic branched glucan chains is bonded to this internally branched cyclic structure portion. For example, in the liquid softener composition of the present invention, the degree of polymerization of the highly branched cyclic dextrin that can be incorporated as component (D) is in the range of 50 to 5000. For example, in the liquid softener composition of the present invention, the degree of polymerization of the internally branched cyclic structure portion of the highly branched cyclic dextrin that can be incorporated as component (D) is in the range of 10 to 100. For example, in the liquid softener composition of the present invention, the degree of polymerization of the outer branched structure portion of the highly branched cyclic dextrin that can be incorporated as component (D) is 40 or higher. For example, in the liquid softener composition of the present invention, the degree of polymerization of each unit chain in the outer branched structure portion of the highly branched cyclic dextrin that can be incorporated as component (D) is, on average, 10 to 20. 【0030】 In the liquid fabric softener composition of the present invention, the highly branched cyclic dextrin that can be incorporated as component (D) is produced, for example, by treating starch as a raw material with an enzyme called a blanching enzyme. The raw material, starch, consists of amylose, in which glucose is linked in a linear chain by α-1,4-glucosidic bonds, and amylopectin, which has a structure that is intricately branched by α-1,6-glucosidic bonds. Amylopectin is a macromolecule in which many cluster structures are linked together. The blanching enzyme used is a glucan transferase widely distributed in plants, animals, and microorganisms, and acts on the junctions of the amylopectin cluster structure, catalyzing the reaction that cyclicizes it. More specifically, the highly branched cyclic dextrin that may be incorporated as component (D) in the liquid softener composition of the present invention is a glucan having an internally branched cyclic structure portion and an externally branched structure portion, with a degree of polymerization in the range of 50 to 10000, as described in Japanese Patent Application Publication No. 8-134104. In this specification, highly branched cyclic dextrin can be understood with reference to the description in Japanese Patent Application Publication No. 8-134104. As a specific example, the highly branched cyclic dextrin that can be incorporated as component (D) in the liquid softener composition of the present invention is "Cluster Dextrin" (product name) manufactured by Glico Nutrition Foods Co., Ltd. 【0031】 The amount of component (D) is not particularly limited, but is preferably 0.01 to 2% by mass, more preferably 0.1 to 2% by mass, and even more preferably 0.5 to 1.5% by mass, relative to the total mass of the liquid softener composition. When the amount of component (D) is 0.01% by mass or more, the effect of suppressing liquid separation and mottled appearance is further improved, and when the amount of component (D) is 2% by mass or less, the freeze-recovery properties, dispersion stability, and / or usability are further improved. In the liquid softener composition of the present invention, the mass ratio C / D of component (C) to component (D) is not particularly limited, but is preferably 0.5 or less, more preferably 0.001 to 0.1, and even more preferably 0.003 to 0.05. The larger the C / D, the better the effect of suppressing liquid separation and mottled appearance, and the smaller the C / D, the better the usability. 【0032】 [(E) component] The liquid fabric softener composition of the present invention may further contain a nonionic surfactant as component (E). In the liquid fabric softener composition of the present invention, component (E) may be added to impart structural viscosity and / or improve viscosity stability after freeze-restoration. As nonionic surfactants, any known components in the field of liquid fabric softeners can be used without particular limitation. Examples include those derived from polyhydric alcohols, higher alcohols, higher amines, or higher fatty acids. More specifically, examples include glycerin fatty acid esters or pentaerythritol, which are formed by esterifying glycerin or pentaerythritol with a fatty acid having 10 to 22 carbon atoms; polyoxyethylene alkyl ethers having an alkyl or alkenyl group having 10 to 22 carbon atoms and an average number of moles of ethylene oxide (EO) added of 10 to 100 moles; polyoxyethylene fatty acid alkyl (alkyl with 1 to 3 carbon atoms) esters; polyoxyethylene alkylamines with an average number of moles of EO added of 10 to 100 moles; alkyl polyglucosides having an alkyl or alkenyl group having 8 to 18 carbon atoms; and hydrogenated castor oil with an average number of moles of EO added of 10 to 100 moles. In particular, polyoxyethylene alkyl ethers having an alkyl group with 10 to 18 carbon atoms and an average number of added EO molecules of 20 to 80 moles (preferably 40 to 80 moles, more preferably 50 to 70 moles) are preferred. Examples of polyoxyethylene alkyl ethers include those obtained by adding an average of 60 moles of EO to primary isotridecyl alcohol (13 carbon atoms), those obtained by adding an average of 40 moles of EO to lauryl alcohol (12 carbon atoms), and those obtained by adding an average of 20 moles of EO to lauryl alcohol (12 carbon atoms). 【0033】 (E) Component is a known substance, readily available on the market, or can be prepared. (E) Component may be used alone or in combination of multiple types. The amount of component (E) is not particularly limited, but is preferably 1% by mass or more and less than 3% by mass, more preferably 1.5% by mass or more and less than 3% by mass, and even more preferably 1.5% by mass or more and 2.5% by mass or less, relative to the total mass of the liquid softener composition. When the amount of component (E) is 1% by mass or more, structural viscosity can be imparted and viscosity stability after freeze-restoration can also be improved. When the amount of component (E) is less than 3% by mass, usability is further improved. 【0034】 [Other optional components] The liquid fabric softener composition of the present invention may contain, as necessary, components other than those listed above (A) to (E), provided that the effects of the present invention are not impaired. For example, fragrances, water-soluble solvents, functional capsules, water, viscosity modifiers, preservatives, etc., may be included. 【0035】 <Fragrance> Fragrances are added to the liquid fabric softener composition to add scent, and also to textile products after they have been treated with the composition. The fragrance is a fragrance that is not contained in a capsule (free fragrance), and is different from the fragrance that is included as the core substance in the encapsulated fragrance (functional capsule) described later. While there are no particular restrictions on the use of fragrances commonly used in the fabric softener field, lists of usable fragrance ingredients are found in various publications, such as "Perfume and Flavor Chemicals," Vol. I and II, Steffen Arctander, Allured Pub. Co. (1994), "Synthetic Fragrances: Chemistry and Product Knowledge," by Motoichi Indo, Chemical Daily Co. (1996), "Perfume and Flavor Materials of Natural Origin," Steffen Arctander, Allured Pub. Co. (1994), "Encyclopedia of Fragrances," edited by the Japan Fragrance Association, Asakura Shoten (1989), "Perfumery Material Performance V.3.3," Boelens Aroma Chemical Information Service (1996), and "Flower oils and Floral Compounds In Perfumery," Danute Lajaujis Anonis, Allured Pub. Co. (1993). Furthermore, some compounds used as fragrance components act as antagonists of malodorous receptors. To enhance the deodorizing effect of liquid fabric softener compositions, for example, olfactory receptor antagonists described in Japanese Patent Publication No. 2017-101224, Japanese Patent Publication No. 2015-193643, and Japanese Patent Publication No. 2020-500589 may be used as fragrances. 【0036】 A single type of fragrance may be used, or multiple types may be used in combination (fragrance-free composition). There are no particular restrictions on the fragrance components used in the fragrance composition, and they can be appropriately selected according to the purpose. Examples of fragrances include aldehydes, phenols, alcohols, ethers, esters, hydrocarbons, ketones, lactones, musks, fragrances with terpene skeletons, natural fragrances, and animal-derived fragrances. Specific examples of each fragrance are as follows. Examples of aldehydes include undecylenaldehyde, laurylaldehyde, aldehyde C-12MNA, miracaldehyde, α-amyl cinnamic aldehyde, cyclamenaldehyde, citral, citronellal, ethyl vanillin, heliotropin, anisaldehyde, α-hexyl cinnamic aldehyde, octanal, ligstral, lilial, liral, tripral, vanillin, and helional. Examples of phenols include eugenol and isoeugenol. Examples of alcohols include citronellol, dihydromyrcenol, dihydrolinalool, geraniol, linalool, nerol, sandalol, santarex, terpineol, tetrahydrolinalool, menthol, borneol, 1-decanal, bacdanol, and phenylethyl alcohol. Examples of ethers include cedrumber, grisalva, methyl eugenol, and methyl isoeugenol. Esters include cis-3-hexenyl acetate, cis-3-hexenyl propionate, cis-3-hexenyl salicylate, p-cresyl acetate, pt-butylcyclohexyl acetate, amyl acetate, methyl dihydrojasmonate (dihydromethyljasmonate), amyl salicylate, benzyl salicylate, benzyl benzoate, benzyl acetate, cedyl acetate, citronellyl acetate, decahydro- Examples include β-naphthyl acetate, dimethylbenzylcarbinyl acetate, erica propionate, ethyl acetate, erica acetate, geranyl acetate, geranyl formate, hedione, linalyl acetate, β-phenylethyl acetate, hexyl salicylate, styraryl acetate, terpinyl acetate, vetiveryl acetate, OT-butylcyclohexyl acetate, manzanate, and allyl heptanoate. Examples of hydrocarbons include limonene (especially d-limonene), α-pinene, β-pinene, myrcene, camphene, and terpinolene. Examples of ketones include α-ionone, β-ionone, methyl-β-naphthylketone, α-damascone, β-damascone, δ-damascone, damascenone, cis-jasmone, methylionone, allylionone, cashmeran, dihydrojasmone, isoesuper, beltfix, isolonediforanone, coavon, carvone, rosephenone, raspberry ketone, dynascone, and maltol. Examples of lactones include γ-decalactone, γ-undecalactone, γ-nonalactone, γ-dodecalactone, coumarin, and ambroxan. Examples of musk compounds include cyclopentadecanolide, ethylene brassirate, galaxolide, musk ketone, tonalide, tonalide, and nitromusks. Examples of fragrances containing a terpene skeleton include geraniol, nerol, linalool, citral, citronellol, menthol, mint, citronellal, myrcene, α-pinene, β-pinene, limonene, terpinellol, carvone, ionone (e.g., β-ionone), camphene, and borneol. Natural fragrances include essential oils such as orange oil, lemon oil, lime oil, petitgrain oil, yuzu oil, neroli oil, bergamot oil, lavender oil, lavandin oil, abies oil, anise oil, bay oil, rose oil, ylang-ylang oil, citronella oil, geranium oil, peppermint oil, spearmint oil, eucalyptus oil, lemongrass oil, patchouli oil, jasmine oil, rose oil, cedar oil, vetiver oil, galbanum oil, oakmoss oil, pine oil, camphor oil, sandalwood oil, fragrant camphor oil, turpentine oil, clove oil, clove leaf oil, cassia oil, nutmeg oil, cananga oil, and thyme oil. Examples of animal-derived fragrances include musk, spirit cat incense, sea lion incense, and ambergris. 【0037】 When the fragrance is a fragrance composition, the content of fragrance components with a ClogP value of 5 or higher is preferably 25% by mass or more, more preferably 30% by mass or more, more preferably 35% by mass or more, and particularly preferably 40% by mass or more, based on the total mass of the fragrance composition. With the above content, better fragrance persistence can be obtained. There are no particular restrictions on the types of fragrance components with a ClogP value of 5 or higher, but preferred examples include habanolide (5.0), ambroxan (5.3), tonalide (6.3), hexyl salicylate (5.1), galaxolide (6.1), muscone (6.0), exaltride (6.2), isoesuper (5.2), Beltfix (acetylcedrene) (5.0), and cedyl methyl ether (5.1) (the numbers in parentheses represent the ClogP value). Among these, habanolide, ambroxan, galaxolide, isoesuper, and tonalide are more preferred. 【0038】 The ClogP value is a value that expresses the 1-octanol / water partition coefficient P, which represents the ratio of the equilibrium concentrations of a chemical substance in 1-octanol and water, in the form of a logarithmic log P with base 10. The ClogP value can be determined by the f-value method (hydrophobic fragment constant method), which involves decomposing the chemical structure of a compound into its constituent elements and accumulating the hydrophobic fragment constants ·f-values ​​of each fragment (see, for example, Clog 3 Reference Manual DaylightSoftware 4.34, Albert Leo, David Weininger, Version 1, March 1994). Generally, the higher the ClogP value of a fragrance, the more hydrophobic it is. Therefore, a fragrance composition containing a large amount of fragrance components with low ClogP values ​​can be said to be more hydrophilic than a fragrance composition containing a large amount of fragrance components with high ClogP values. 【0039】 The fragrance composition may contain solvents commonly used in liquid fabric softeners. Examples of fragrance solvents include acetin (triacetin), MMB acetate (3-methoxy-3-methylbutyl acetate), sucrose diacetate hexisobutyrate, ethylene glycol dibutyrate, hexylene glycol, dibutyl sebacate, Deltil Extra (isopropyl myristate), methyl carbitol (diethylene glycol monomethyl ether), carbitol (diethylene glycol monoethyl ether), TEG (triethylene glycol), benzyl benzoate (BB), propylene glycol, diethyl phthalate, tripropylene glycol, avorin (dimethyl phthalate), Deltil Prime (isopropyl palmitate), and dipropylene glycol (DPG). Examples include farnesene, dioctyl adipate, tributylin (glyceryl tributanoate), hydrolyte-5 (1,2-pentanediol), propylene glycol diacetate, cetyl acetate (hexadecyl acetate), ethyl abietate, avalin (methyl abietate), Citroflex A-2 (acetyl triethyl citrate), Citroflex A-4 (tributyl acetyl citrate), Citroflex No. 2 (triethyl citrate), Citroflex No. 4 (tributyl citrate), Durafix (methyl dihydroabietate), MITD (isotridecyl myristate), polylimonene (limonene polymer), and 1,3-butylene glycol. The solvent content is, for example, 0.1 to 30% by mass, preferably 1 to 20% by mass, relative to the total mass of the fragrance composition. 【0040】 The fragrance composition may contain antioxidants commonly used in liquid fabric softeners. Examples of antioxidants for fragrances include 3,5-di-tert-butyl-4-hydroxytoluene (BHT), t-butyl-p-hydroxyanisole (BHA), p-methoxyphenol, β-naphthol, phenyl-α-naphthylamine, tetramethyldiaminodiphenylmethane, γ-oryzanol, vitamin E (α-tocopherol, β-tocopherol, γ-tocopherol, δ-tocopherol), 2,2'-ethylidenebis(4,6-di-t-butylphenol), tris(tetramethylhydroxypiperidinol)·1 / 3 citrate, bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate, quercetin, and 4,4'-bis(α,α-dimethylbenzyl)diphenylamine. Preferably, it is 3,5-di-tert-butyl-4-hydroxytoluene (BHT). The antioxidant content is, for example, 0.001 to 10% by mass, preferably 0.01 to 5% by mass, relative to the total mass of the fragrance composition. 【0041】 The fragrance content is not particularly limited as long as it is sufficient to achieve the intended formulation, but is preferably 0.3 to 2% by mass, and more preferably 0.5 to 1% by mass, relative to the total mass of the liquid fabric softener composition. A fragrance content of 0.3% by mass or more yields a higher formulation effect, while a fragrance content of 1% by mass or less yields excellent separation stability. 【0042】 <Water-soluble solvent> Water-soluble solvents are added to further improve the stability (especially the freeze-recovery properties) of the liquid fabric softener composition. As the water-soluble solvent, one or more selected from the group consisting of C1-C4 alcohols, glycol ether solvents, and polyhydric alcohols are preferred. Specifically, it is preferable to blend solvent components selected from ethanol, isopropanol, glycerin, ethylene glycol, propylene glycol, diethylene glycol, dipropylene glycol, hexylene glycol, polyoxyethylene phenyl ether, and water-soluble solvents represented by the following general formula (X). R 4-O-(C2H4O) y -(C3H6O) Z -H ···(X) (In the formula, R 4 (wherein is an alkyl or alkenyl group having 1 to 6 carbon atoms, preferably 2 to 4 carbon atoms, and y and z are the average number of moles added, where y is 1 to 10, preferably 2 to 5, and z is 0 to 5, preferably 0 to 2.) Among those listed above, ethanol, ethylene glycol, butyl carbitol, propylene glycol, dipropylene glycol monomethyl ether, and diethylene glycol monobutyl ether are preferred. A single type of water-soluble solvent may be used, or multiple types may be used in combination. The content of the water-soluble solvent is not particularly limited as long as the formulation objective is achieved, but is preferably 0.01 to 4% by mass, more preferably 0.01 to 3% by mass, and especially preferably 0.1 to 3% by mass, based on the total mass of the liquid softener composition. 【0043】 <Functional Capsules> Functional capsules are incorporated into liquid fabric softener compositions to impart various functions derived from the core material contained within the capsule. A functional capsule consists of a core material and a wall material that covers the core material. As the core material, any material commonly used as a capsule encapsulant in the liquid fabric softener field can be used without particular restrictions. Specific examples include fragrances, essential oils, whitening agents, insect repellents, silicones, waxes, flavorings, vitamins, skincare agents, enzymes, probiotics, dyes, pigments, fragrance precursors, cooling agents, warming agents, attractants such as pheromones, antibacterial agents, bleaching agents, flavorings, sweeteners, waxes, pharmaceuticals, fertilizers, and herbicides. The core material may be of a single type or multiple types may be used in combination. As the wall material, any material commonly used as encapsulation material in the field of liquid softener compositions can be used without particular limitations. Specific examples include natural polymers such as gelatin and agar, oily film-forming substances such as oils and waxes, and synthetic polymers such as polyacrylic acid, polyvinyl, polymethacrylic acid, melamine, and urethane. One of these can be used alone or two or more can be used in appropriate combination. 【0044】 Specific examples of encapsulated fragrances with fragrance as the core substance include Firmenich's BLUEFLOWERPOP "FFMHN2814," Givaudan's GREEN BREEZE CAPS, ORCHARD GARDEN CAPS, RAINBOW CAPS, VELVET CAPS, AURORACAPS, and COSMICCAPS, and IFF's UNICAP101 and UNICAP503. Specific examples of cooling capsules that use a cooling agent as the core material include MultiSal SalCool, HydroSal FreshCool, and SalSphere SalCool from SALVONA Technologies, and NeoAge AROMA-C from Nikka Chemical Co., Ltd. Specific examples of heat-sensitive capsules that use a heat-sensitive agent as the core material include Riken Resin RMC-TO manufactured by Miki Riken Co., Ltd., and Hydrosal Heat manufactured by Salvona Technologies. Other specific examples include Riken Resin NFHO-W (antibacterial effect), Riken Resin RMC-HBP (insect repellent effect), and RMC-PT (insect repellent effect) manufactured by Miki Riken Co., Ltd. The average particle size of the functional capsules is preferably 10 to 30 μm. Functional capsules having the above particle size exhibit excellent adsorption to clothing and can be stably dispersed in the liquid fabric softener composition. Functional capsules may be of a single type or multiple types may be used in combination. The content of the functional capsules is not particularly limited as long as the purpose of formulation is achieved, but is preferably 0.0001 to 1% by mass relative to the total mass of the liquid softener composition. 【0045】 <Water> The liquid fabric softener composition is preferably an aqueous composition containing water. For the water used, tap water, deionized water, purified water, or distilled water can be used. Of these, deionized water is preferable. The water content is not particularly limited, but is preferably 50% by mass or more, and more preferably 60% by mass or more, relative to the total mass of the liquid softener composition. A water content of 50% by mass or more results in better handling properties. 【0046】 <Viscosity modifier> Viscosity modifiers are added to further improve the usability of the liquid softener composition. Specific examples of viscosity modifiers include calcium chloride, magnesium chloride, sodium chloride, sodium p-toluenesulfonate, and sodium citrate. Among these, calcium chloride, magnesium chloride, and sodium citrate are preferred. A single type of viscosity modifier may be used, or multiple types may be used in combination. The viscosity modifier content is 0.001 to 0.5% by mass, preferably 0.003 to 0.2% by mass, and more preferably 0.005 to 0.1% by mass, relative to the total mass of the liquid softener composition. 【0047】 <Preservatives> Preservatives are primarily added to enhance the preservative and antibacterial properties of liquid fabric softener compositions, and to maintain their preservative effect during long-term storage. As preservatives, any known components in the field of liquid fabric softeners can be used without particular restriction. Specific examples include isothiazolone-based organosulfur compounds, benzisothiazolone-based organosulfur compounds, benzoic acids, and 2-bromo-2-nitro-1,3-propanediol. Examples of isothiazolone-type organosulfur compounds include 5-chloro-2-methyl-4-isothiazolin-3-one, 2-n-butyl-3-isothiazolone, 2-benzyl-3-isothiazolone, 2-phenyl-3-isothiazolone, 2-methyl-4,5-dichloroisothiazolone, 5-chloro-2-methyl-3-isothiazolone, 2-methyl-4-isothiazolin-3-one, and mixtures thereof. Among these, 5-chloro-2-methyl-4-isothiazolin-3-one and 2-methyl-4-isothiazolin-3-one are preferred, and a mixture of 5-chloro-2-methyl-4-isothiazolin-3-one and 2-methyl-4-isothiazolin-3-one is more preferred. A mixture in which the former is about 77% by mass and the latter is about 23% by mass, or a diluted solution thereof (e.g., isothiazolone solution), is particularly preferred. Examples of benzisothiazolon-type organosulfur compounds include 1,2-benzisothiazolin-3-one, 2-methyl-4,5-trimethylene-4-isothiazolin-3-one, related compounds such as dithio-2,2-bis(benzmethylamide), and mixtures thereof. Among these, 1,2-benzisothiazolin-3-one is particularly preferred. Examples of benzoic acids include benzoic acid or its salts, p-hydroxybenzoic acid or its salts, methyl p-hydroxybenzoate, ethyl p-hydroxybenzoate, propyl p-hydroxybenzoate, butyl p-hydroxybenzoate, and benzyl p-hydroxybenzoate. A single type of preservative may be used, or multiple types may be used in combination. The content of the preservative is not particularly limited as long as the purpose of formulation is achieved, but it is preferably 0.0001 to 1% by mass relative to the total mass of the liquid fabric softener composition. If it is 0.0001% by mass or more, the effect of the preservative is sufficiently obtained, and if it is 1% by mass or less, the high storage stability of the liquid fabric softener composition can be sufficiently maintained. 【0048】 In addition to the optional components mentioned above, the liquid fabric softener composition may also contain antioxidants and reducing agents to improve the stability of its fragrance and color, emulsifiers (such as polystyrene emulsion), opacifiers, shrinkage inhibitors, wrinkle inhibitors, shape-retaining agents, drape-retaining agents, ironing-enhancing agents, oxygen bleach inhibitors, whitening agents, fabric softening clay, antistatic agents, color transfer inhibitors (such as polyvinylpyrrolidone), polymer dispersants, stain removers, scum dispersants, fluorescent whitening agents (such as 4,4-bis(2-sulfostyryl)biphenyldisodium (Chiba Specialty Chemicals' Chinopearl CBS-X)), dye fixatives, fade inhibitors (such as 1,4-bis(3-aminopropyl)piperazine), stain removers, and fiber surface modifiers. The product can contain appropriate ingredients such as enzymes (cellulase, amylase, protease, lipase, keratinase, etc.), foam inhibitors, and components that impart the texture and functionality of silk, such as moisture absorption and release properties (silk protein powder, surface modifiers thereof, emulsified dispersions, specifically K-50, K-30, K-10, A-705, S-702, L-710, FP series (Idemitsu Petrochemical), hydrolyzed silk liquid (Jomo), Silkgen G Solubble S (Ichimaru Falcos)), as well as anti-fouling agents (nonionic polymer compounds consisting of alkylene terephthalate and / or alkylene isophthalate units and polyoxyalkylene units, for example, FR627 manufactured by Go-o Chemical Industry, SRC-1 manufactured by Clariant Japan, etc.). 【0049】 [pH of liquid fabric softener composition] The pH of the liquid fabric softener composition is not particularly limited, but from the viewpoint of suppressing hydrolysis of component (A) due to storage over time, the pH at 25°C is preferably adjusted to a range of 1 to 6, and more preferably 2 to 4. For pH adjustment, hydrochloric acid, sulfuric acid, phosphoric acid, alkyl sulfuric acid, benzoic acid, p-toluenesulfonic acid, citric acid, malic acid, succinic acid, lactic acid, glycolic acid, hydroxyethanediphosphonic acid, phytic acid, ethylenediaminetetraacetic acid, short-chain amine compounds such as dimethylamine, alkali metal hydroxides such as sodium hydroxide, alkali metal carbonates, and alkali metal silicates can be used. 【0050】 [Viscosity of liquid fabric softener composition] The viscosity of the liquid fabric softener composition is not particularly limited as long as it does not impair its usability, but it is preferably less than 1000 mPa·s. Considering the increase in viscosity due to storage over time, the viscosity immediately after manufacturing is more preferably less than 800 mPa·s, and even more preferably less than 500 mPa·s. A viscosity of less than 800 mPa·s provides good usability, such as ease of handling when adding to a washing machine. From the viewpoint of usability, there is no particular lower limit to the viscosity. The viscosity can be adjusted using the viscosity modifiers mentioned above as optional components. The viscosity mentioned above refers to the value measured at 25°C using a B-type viscometer (for example, Brookfield's analog viscometer T). 【0051】 [Method for preparing a liquid fabric softener composition] Liquid fabric softener compositions can be manufactured by known methods, such as the same methods used for conventional liquid fabric softener compositions that use a cationic surfactant as the main ingredient. For example, an emulsion can be prepared by mixing an oil phase containing components (A), (B), (E), and fragrance with an aqueous phase under conditions of a temperature above the melting point of component (A). A liquid fabric softener composition can then be produced by adding and mixing component (C) and, if necessary, other components such as component (D) to the resulting emulsion. 【0052】 [How to use liquid fabric softener composition] The method for treating textile products using the liquid fabric softener composition is not particularly limited and can be used in the same way as conventional liquid fabric softeners. For example, the liquid fabric softener composition can be dissolved in the rinse water during the rinsing stage of washing, or the liquid fabric softener composition can be dissolved in water in a container such as a basin, and the textile products can then be immersed in the solution. In either case, the solution is used after being diluted to an appropriate concentration, but the bath ratio (weight ratio of the treatment solution to the textile products) is preferably 3 to 100 times, and particularly preferably 5 to 50 times. Specifically, the solution is used in such an amount that the concentration of component (A) is preferably 0.01 ppm to 1000 ppm, and more preferably 0.1 ppm to 300 ppm, relative to the total amount of water used. The types of textile products that can be treated with the liquid fabric softener composition are not particularly limited and include, for example, clothing, curtains, sofas, carpets, towels, handkerchiefs, sheets, and pillowcases. The materials may also be natural fibers such as cotton, silk, and wool, or synthetic fibers such as polyester. [Examples] 【0053】 The present invention will be described in more detail below with reference to examples, but the scope of the present invention is not limited thereto. In the examples, all component amounts are expressed in mass % (on a pure content basis unless otherwise specified). 【0054】 [(A) component] The following A-1 and A-2 were used. A-1: A cationic surfactant as described in Example 4 of Japanese Patent Publication No. 2003-12471. A-1 is a compound represented by the general formulas (A1-3), (A1-4), and (A1-5) (where R is in each formula). 9 The composition contains a quaternary nucleotide (which is an alkyl group and alkenyl group having 15 to 17 carbon atoms) that has been quaternized with dimethyl sulfate. A-2: Product name "Stepantex SE-88", manufactured by Stepan. 【0055】 [(B) Component] The following B-1 and B-2 were used. B-1: Hexadecyltrimethylammonium chloride (manufactured by Tokyo Chemical Industry Co., Ltd.) B-2: Cetylpyridinium chloride (manufactured by Wako Pure Chemical Industries, Ltd.) 【0056】 [(C) component] The following C-1 to C-4 were used. C-1: Product name "RHEOBYK-H 7625 VF", manufactured by Bic Chemie Japan Co., Ltd. C-2: Product name "RHEOBYK-H 3300 VF", manufactured by Bic Chemie Japan Co., Ltd. C-3: Product name "RHEOBYK-M 2600 VF", manufactured by Bic Chemie Japan Co., Ltd. C-4: Product name "RHEOBYK-L 1400 VF", manufactured by Bic Chemie Japan Co., Ltd. 【0057】 [Optional ingredients] <Highly branched cyclic dextrin> D-1: Product name "Cluster Dextrin", manufactured by Glico Nutrition Foods Co., Ltd. 【0058】 <Nonionic surfactant> E-1: Polyoxyethylene isotridecyl ether EO60 molars (an average EO60 molar adduct of primary isotridecyl alcohol (C13)) 【0059】 <Common ingredients> • Viscosity modifier 0.01% by mass (Calcium chloride: Product name "Granular Calcium Chloride", manufactured by Tokuyama Corporation) • Preservative 20 ppm (1,2-Benzisothiazolin-3-one: Product name "Nipacide BIT 20", manufactured by Clariant Japan Co., Ltd.) • Encapsulated fragrance 0.2% by mass * (Product name: "GREEN BREEZE CAPS", manufactured by Givaudan Co., Ltd.) • Fragrance-free 1% by mass * (Fragrance composition containing fragrance components with the composition shown in Table 1 below) * Amount of fragrance (by mass) relative to the total mass of the liquid fabric softener composition [Table 1] 【0060】 [Method for preparing a liquid fabric softener composition] Using a glass container with an inner diameter of 100 mm and a height of 150 mm, and a stirrer (Agitator SJ type, manufactured by Shimadzu Corporation), the amount of each component was adjusted as described in Table 2 below and in the section on common components, and the fabric softener composition was prepared according to the following procedure. In Table 2 below, and with respect to viscosity modifiers and preservatives, the values ​​for each component represent the amount (mass %) added to the total mass of the liquid fabric softener composition. First, components (A), (B), a nonionic surfactant, and a fragrance were mixed and stirred to obtain an oil phase mixture. Meanwhile, a preservative was dissolved in deionized water for balancing to obtain an aqueous phase mixture. Here, the mass of the deionized water for balancing corresponds to the remainder after subtracting the total amount of the oil phase mixture, component (C), highly branched cyclic dextrin, preservative, encapsulated fragrance, and viscosity modifier from 980g. Next, the oil phase mixture, heated above the melting point of component (A), was placed in a glass container and stirred. The aqueous phase mixture, also heated above the melting point of component (A), was added in two portions and stirred. Here, the ratio of the aqueous phase mixture was 30:70 (mass ratio), and stirring was performed at a rotation speed of 1,000 rpm for 3 minutes after the first addition of the aqueous phase mixture and for 2 minutes after the second addition. Component (C), highly branched cyclic dextrin, encapsulated fragrance, and viscosity modifier were added to the resulting emulsion. If necessary, an appropriate amount of hydrochloric acid (1 mol / L reagent, Kanto Chemical) or sodium hydroxide (1 mol / L reagent, Kanto Chemical) was added to adjust the pH to 2.5. Finally, ion-exchanged water was added to bring the total mass to 1,000 g to obtain the target liquid softener compositions (Examples 1-22 and Comparative Examples 1-4). 【0061】 [Method for evaluating liquid fabric softener compositions] <Evaluation of the effect of suppressing odors from drying clothes indoors> Used towels with a musty smell, commonly found in ordinary households, were used as evaluation fabric to verify the effectiveness of the indoor drying odor suppression agent. The evaluation fabric was washed for 10 minutes using a twin-tub washing machine (Panasonic Corporation NA-W40G2) with commercially available detergent "Top Platinum Clear" (Lion Corporation) (standard usage amount, standard course, bath ratio 20 times, using tap water at 25°C), followed by a first rinse (3 minutes). During the second rinse, each liquid fabric softener composition prepared according to the "Method for Preparing Liquid Fabric Softener Compositions" described above was used for a 3-minute softening treatment (10 mL of liquid fabric softener composition per 1.5 kg of test fabric, bath ratio 20 times, using tap water at 25°C). After the softening treatment, the fabric was spun dry and hung to dry in a room at 25°C and 100% RH relative humidity for 6 hours (indoor drying). Subsequently, six expert panelists conducted a sensory evaluation by smelling the collected towels after 6 hours of drying (indoor drying). Specifically, expert panelists smelled each household towel after drying them indoors and scored them according to the following six-level odor intensity scale. The average score (calculated to one decimal place) was calculated from the six panelists' scores and evaluated according to the following criteria. The results are shown in the "Deodorizing Performance" column in Table 2 below. In terms of commercial value, towels with a score of ○ or higher were considered acceptable. 【0062】 (Odor intensity indication) 0 points: There is absolutely no unpleasant odor. 1. The odor is barely noticeable. Points 2: The odor is perceived as weak. 3 points: The odor is somewhat strong. 4 points: A strong, unpleasant odor is noticeable. 5 points: The odor is extremely strong. 【0063】 (Judgment criteria) ◎◎: Less than 1 point ◎: 1 point or more, less than 1.5 points ○: 1.5 points or more, less than 2 points ×: 2 or more points 【0064】 <Evaluation of the effect of suppressing liquid separation and mottled appearance> Each liquid fabric softener composition prepared according to the "Method for Preparing Liquid Fabric Softener Compositions" described above was placed in 80 mL lightweight glass bottles (PS-No. 11, manufactured by Tanuma Glass Industry Co., Ltd.), sealed tightly, and used as evaluation samples for the following durability tests. The evaluation samples were stored at 40°C for 12 hours, followed by 5°C for 12 hours, and this process was repeated three times. Afterward, a durability test was conducted by storing the samples at 5°C for 6 hours. The liquid state after the durability test was visually observed and evaluated according to the following evaluation criteria. The average score (calculated to one decimal place) of eight expert panelists was calculated and evaluated according to the following judgment criteria. The results are shown in the "Separation / Staining Suppression" section of Table 2 below. Samples with a score of ○ or higher were considered acceptable in terms of commercial value. 【0065】 (Evaluation Criteria) 4 points: No phase separation / mottled appearance observed, comparable to the sample before storage. 3. A very thin, translucent layer can be observed in the upper or lower layers, but no mottled appearance is seen. Two points: A slightly translucent layer can be observed in the upper or lower layer, and a slightly mottled appearance can be observed. 1 point: A clearly translucent layer is visible in the upper or lower layer, and a mottled appearance is clearly visible. 0 points: A clearly transparent layer is visible in the upper or lower layer, and a mottled appearance is clearly visible. 【0066】 (Judgment criteria) ◎◎: 4 points ◎: 3 points or more, less than 4 points ○: 2 points or more, less than 3 points ×: Less than 2 points 【0067】 [Table 2]

Claims

[Claim 1] The following components (A) to (C): (A) At least one compound selected from the group consisting of amine compounds having 1 to 3 hydrocarbon groups having 10 to 26 carbon atoms separated by an ester group (-COO-) and / or an amide group (-NHCO-), salts thereof, and quaternary compounds thereof; (B) At least one quaternary ammonium salt selected from the following components (B-1); (B-1) Component Quaternary ammonium salts represented by general formula (B1) (In the formula, R 1 R is a hydrocarbon group having 8 to 18 carbon atoms. 2 , R 3 and R 4 (where X is independently an alkyl group having 1 to 3 carbon atoms, or a hydroxyalkyl group having 1 to 3 carbon atoms, and X represents an anion.) and (C) Nonionic polymer having a urethane skeleton A liquid softener composition containing (E) a polyoxyethylene alkyl ether having an alkyl group with 10 to 18 carbon atoms and an average number of moles of ethylene oxide added of 50 to 70 moles, wherein the content of component (B-1) is 0.3% by mass or less. [Claim 2] The liquid softener composition according to Claim 1, wherein the mass ratio A / B-1 of component (A) to component (B-1) is 20 to 100. [Claim 3] (B-1) R 1 The liquid softener composition according to claim 2, wherein the carbon number is 16. [Claim 4] The liquid softener composition according to claim 3, wherein the mass ratio of component (B-1) to component (C), B-1 / C, is 1 to 300. [Claim 5] A liquid softener composition according to any one of claims 1 to 4, further comprising (D) highly branched cyclic dextrin, wherein the mass ratio C / D of component (C) to component (D) is 0.003 to 0.05.

Images