Liquid fabric softener composition

Abstract

To provide a liquid softener that prevents a lingering perfume, provides antibacterial properties, and barely causes a deterioration of appearance during long-term storage.SOLUTION: An emulsifiable liquid softener composition comprises the following components (A)-(D): (A) a cationic surfactant, (B) a compound selected from (B-1)-(B-3) set forth in the specifications, (C) at least one compound selected from (C-1)-(C-3) set forth in the specifications, and (D) a free fragrance, with the content of the component (C) being more than 0 mass% to less than 1.1 mass% relative to the total mass of the liquid softener composition, and the content of the component (D) being more than 0 mass% to less than 1.5 mass% relative to the total mass of the liquid softener composition.SELECTED DRAWING: None

Description

[Technical Field]

[0001] This invention relates to a liquid fabric softener composition. [Background technology]

[0002] In recent years, the market size for fabric softeners in Japan has been expanding, and the share of fabric softeners with deodorizing functions has been growing year by year. On the other hand, most current deodorizing technologies rely on masking with fragrance, raising concerns about issues such as "smell harassment." Therefore, there is a need for deodorizing technology that does not rely on fragrance. As a specific example, a technology is known that involves blending specific amounts of a cationic surfactant, a quaternary ammonium salt, and a nonionic surfactant (Patent Document 1). Furthermore, in the field of liquid fabric softeners, techniques are known for incorporating specific quaternary ammonium salts or amine oxides to improve freeze-recovery properties, enhance the dispersibility of encapsulated fragrances, suppress solid precipitation due to exposure to sunlight, and maintain appearance in terms of transparency and color (Patent Documents 2-6). [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2019-131943 [Patent Document 2] Japanese Patent Publication No. 2015-34371 [Patent Document 3] Japanese Patent Publication No. 2013-133547 [Patent Document 4] Japanese Patent Publication No. 2014-125692 [Patent Document 5] Japanese Patent Publication No. 2019-94581 [Patent Document 6] Japanese Patent Publication No. 2015-224414 [Overview of the project] [Problems that the invention aims to solve]

[0004] In a liquid fabric softener containing a softening base (cationic surfactant) and an antibacterial agent (quaternary ammonium salt, etc.), when the amount of free fragrance was reduced to suppress the lingering scent (fragrance retention) on textile products after softening, a new phenomenon was discovered: mottled separation occurred inside the liquid fabric softener during long-term storage in environments with large temperature fluctuations, resulting in a deterioration of its appearance. Furthermore, it was found that mottled separation is more likely to occur when the ClogP value of the free fragrance is low or when the amount of softening base (cationic surfactant) is low. Therefore, the objective was set to provide a liquid fabric softener that suppresses lingering fragrance, imparts antibacterial (deodorizing) properties, and inhibits deterioration of appearance during long-term storage. [Means for solving the problem]

[0005] As a result of diligent investigation into the aforementioned problems, the inventors have found that even when the amount of free fragrance is reduced in a liquid fabric softener containing a softening base and a specific antibacterial agent, if a specific type of compound is further added in a specific amount, the fragrance remaining on the textile product after softening is suppressed, antibacterial properties (deodorizing properties) are imparted, and deterioration of appearance due to long-term storage is further suppressed. The present invention is based on this finding.

[0006] In other words, the present invention relates to the following [1] to [9]. [1] A liquid softener composition, The following ingredients (A) to (D): (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 compound selected from the group consisting of (B-1) to (B-3) below: (B-1) Compounds represented by general formula (B1): TIFF0007862075000001.tif4195 (in the formula, R 1 This is a hydrocarbon group having 6 to 24 carbon atoms. R2 is a hydrocarbon group having 6 to 24 carbon atoms, a benzyl group, an alkyl group having 1 to 3 carbon atoms, or a hydroxyalkyl group having 1 to 3 carbon atoms, R 3 and R 4 are each independently an alkyl group having 1 to 3 carbon atoms or a hydroxyalkyl group having 1 to 3 carbon atoms, X - is an anion group.); (B-2) A compound represented by the general formula (B2): TIFF0007862075000002.tif3095(wherein, R 5 is a hydrocarbon group having 8 to 18 carbon atoms, X - is an anion group.); (B-3) An amine oxide having one optionally substituted hydrocarbon group having 6 to 24 carbon atoms and two identical or different optionally substituted hydrocarbon groups having 1 to 3 carbon atoms; (C) At least one compound selected from the group consisting of the following (C-1) to (C-3): (C-1) An ester of an aliphatic carboxylic acid having 6 to 24 carbon atoms or an aromatic carboxylic acid having 7 to 24 carbon atoms and a monohydric to hexahydric aliphatic alcohol having 1 to 24 carbon atoms or a monohydric aromatic alcohol having 7 to 24 carbon atoms; (C-2) A compound represented by the general formula (C2): R 6 -(AO) n -R 6 (C2) (wherein, R 6 are each independently an acyl group or acyloxy group derived from a fatty acid having 6 to 24 carbon atoms, H, or CH3, provided that at least one of R 6 is an acyl group or acyloxy group derived from a fatty acid having 6 to 24 carbon atoms, AO is an oxyalkylene group having 2 to 4 carbon atoms, n is 2 to 100.). (C-3) An alcohol having 12 to 24 carbon atoms; (D) A free perfume, and contains (C) The content of component is greater than 0% by mass and less than 1.1% by mass relative to the total mass of the liquid softener composition. (D) The content of component is greater than 0% by mass and less than 1.5% by mass relative to the total mass of the liquid softener composition, A liquid fabric softener composition characterized by being of the emulsion type. [2] The liquid softener composition according to [1] above, wherein (B-1) is selected from the group consisting of tetradecyltrimethylammonium chloride, hexadecyltrimethylammonium chloride, cetyltrimethylammonium chloride, didecyldimethylammonium chloride, didecylmethylethyl ethosulfate, tetradecyldimethylethyl ethosulfate, and benzalkonium chloride. [3] The liquid softener composition according to [1] or [2], wherein (B-2) is cetylpyridinium chloride. [4] The liquid softener composition according to any one of [1] to [3] above, wherein (B-3) is a compound represented by the general formula (B3-1) or (B3-2). TIFF0007862075000003.tif4185(in the formula, R 1 This is a linear or branched alkyl group having 8 to 18 carbon atoms, which may be substituted, or a linear or branched alkenyl group having 8 to 18 carbon atoms, R 2 and R 3 Each of these is independently a C1-C3 alkyl group (preferably a methyl group) or a C1-C3 hydroxyalkyl group. TIFF0007862075000004.tif40113 (in the formula, R 1 This is a linear or branched alkyl group having 8 to 18 carbon atoms, which may be substituted, or a linear or branched alkenyl group having 8 to 18 carbon atoms, R 2 and R 3Each of these is independently an alkyl group having 1 to 3 carbon atoms (preferably a methyl group), or a hydroxyalkyl group having 1 to 3 carbon atoms. R 4 This is an alkylene group having 1 to 5 carbon atoms. Y is -CONR 5 -, -NR 5 CO-, -COO-, or -OCO-(R 5 (This is a hydrogen atom or an alkyl group having 1 to 3 carbon atoms.) [5] The liquid fabric softener composition according to any one of [1] to [4] above, wherein the content of component (B) is greater than 0% by mass and less than 2% by mass relative to the total mass of the liquid fabric softener composition. [6] A liquid softener composition according to any one of [1] to [5], wherein the mass ratio (B / A) of component (B) to component (A) is 0.001 to 0.2. [7] A liquid softener composition according to any one of [1] to [6] above, wherein (C-1) is selected from the group consisting of tri(caprylic / capric acid) glyceryl, tricaprylate glyceryl, tricaprate glyceryl, tripalmitate glyceryl, trioleate glyceryl, octyldodecyl myristate, isopropyl myristate, and benzyl benzoate. [8] A liquid fabric softener composition according to any one of [1] to [7] above, wherein (C-2) is selected from the group consisting of PEG-12 diisostearate, PEG-12 distearate, PEG-12 dioleate, PEG-12 dilaurate, PEG-75 dilaurate, and PEG-4 laurate. [9] A liquid softener composition according to any one of [1] to [8], wherein (C-3) is 1-hexadecanol. [Effects of the Invention]

[0007] As shown in the examples described later, the liquid fabric softener composition of the present invention suppresses residual fragrance, imparts antibacterial (deodorizing) properties, and suppresses deterioration of appearance due to long-term storage. Therefore, the present invention can provide a liquid fabric softener with commercial value not found in conventional products. [Modes for carrying out the invention]

[0008] [Component (A)] (A) Component is a cationic surfactant that 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 in the molecule, 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 position of the double bond be in the center of the long-chain hydrocarbon group or distributed around the median. 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 cleaving group is either an ester group (-COO-) or an amide group (-NHCO-). If a long-chain hydrocarbon group has two or more cleaving groups, each cleaving group may be the same or different. Furthermore, the carbon atoms in the fragmentation group shall be counted in the number of carbon atoms of the long-chain hydrocarbon group. Long-chain hydrocarbon groups are typically introduced by using unhydrogenated fatty acids derived from beef tallow, fatty acids obtained by hydrogenating or partially hydrogenating the unsaturated portion, unhydrogenated fatty acids or fatty acid esters derived from plants such as palm oil and oil palm, or fatty acids or fatty acid esters obtained by hydrogenating or partially hydrogenating the unsaturated portion. In an amine compound having 1 to 3 hydrocarbon groups with 10 to 26 carbon atoms separated by an ester group (-COO-) or an amide group (-NHCO-) ​​(hereinafter referred to as "amine compound" in this specification), the number of long-chain hydrocarbon groups is 1 to 3. Preferably, there are 2 (secondary amine compound) or 3 (tertiary amine compound), and more preferably 3.

[0010] Examples of amine compounds include those represented by the following general formula (A1). TIFF0007862075000005.tif1954 (in the formula, R 1 ~R 3 Each of these is independently -CH2CH(Y)OCOR 4 (Y is a hydrogen atom or CH3, R 4 (A hydrocarbon group with 7 to 21 carbon atoms), -(CH2) n NHCOR 5 (n is 2 or 3, R 5 (where Y is a hydrocarbon group with 7 to 21 carbon atoms), a hydrogen atom, an alkyl group with 1 to 4 carbon atoms, -CH2CH(Y)OH (where Y is a hydrogen atom or CH3), or -(CH2) n NH2 (where n is 2 or 3), R 1 ~R 3 At least one of them 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, a C1-C4 alkyl group, -CH2CH(Y)OH (where Y is a hydrogen atom or CH3), or -(CH2) n NH2 (where n is 2 or 3), an alkyl group having 1 to 4 carbon atoms, -CH2CH(Y)OH, or -(CH2) nIt 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). In each of the formulas in TIFF0007862075000006.tif189103((A1-1)~(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 (1). 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)).

[0020] (A) The content of the component is not particularly limited as long as the blending purpose can be achieved, but it is preferably 1 to 20% by mass, more preferably 4 to 18% by mass, and particularly preferably 7 to 12% by mass based on the total mass of the liquid softener composition. When the content is 1% by mass or more, a higher softening effect can be obtained. When the content is 20% by mass or less, the viscosity stability of the liquid softener composition during long-term storage is good. Prior to the completion of the present invention, the inventor has found that when the content of the component (A) is 12% by mass or less, mottled separation is likely to occur inside the liquid softener. However, even when the component (A) is used at such a content, the occurrence of mottled separation can be suppressed by following the present invention.

[0021] [(B) Component] (B) The component is at least one compound selected from the group consisting of (B-1) to (B-3) described below. (B) The component has an antibacterial action and is blended to impart antibacterial properties (and the odor prevention properties brought about by the antibacterial action) to textile products and further to enhance the storage stability of the liquid softener composition.

[0022] [(B-1)] (B-1) is a quaternary ammonium salt represented by the general formula (B1). TIFF0007862075000007.tif4195(In the formula, R 1 is a hydrocarbon group having 6 to 24 carbon atoms, R 2 is a hydrocarbon group having 6 to 24 carbon atoms, a benzyl group, an alkyl group having 1 to 3 carbon atoms, or a hydroxyalkyl group having 1 to 3 carbon atoms, R 3 and R 4 are independently an alkyl group having 1 to 3 carbon atoms or a hydroxyalkyl group having 1 to 3 carbon atoms, X - is an anion group.)

[0023] R 1 and R 2The hydrocarbon group has 6 to 24 carbon atoms, preferably 10 to 18 carbon atoms. When within these carbon atom ranges, the balance between the adsorbability to fiber products and the antibacterial action is improved, and excellent deodorizing properties can be obtained. R 1 and R 2 Specific examples of the hydrocarbon group of R, R, and R include a decyl group (10 carbon atoms), a tetradecyl group (14 carbon atoms), a hexadecyl group (cetyl group) (16 carbon atoms), and the like. R 2 , R 3 and R 4 Specific examples of the alkyl group of R, R, and R include a methyl group, an ethyl group, and the like. R 2 , R 3 and R 4 Specific examples of the hydroxyalkyl group of R, R, and R include a hydroxymethyl group and a hydroxyethyl group. X - Examples of X include anions such as methyl sulfate, ethyl sulfate (ethosulfate (CH3CH2SO 4- )).

[0024] Specific examples of (B-1) include tetradecyltrimethylammonium chloride, hexadecyltrimethylammonium chloride, cetyltrimethylammonium chloride, didecyldimethylammonium chloride, didecyldimethylethylammonium ethosulfate, tetradecyldimethylethylammonium ethosulfate, benzalkonium chloride, and the like. Hexadecyltrimethylammonium chloride and didecyldimethylammonium chloride are preferred.

[0025] [[(B-2)]] (B-2) is a compound represented by the general formula (B2). TIFF0007862075000008.tif3095(In the formula, R 5 is a hydrocarbon group having 8 to 18 carbon atoms, and X - is an anion group.)

[0026] R5 The hydrocarbon group has 8 to 18 carbon atoms, preferably 10 to 18. Within this carbon atom range, the balance between adsorption to textile products and antibacterial activity is improved, resulting in excellent deodorizing properties. R 5 Specific examples of hydrocarbon groups include the decyl group (10 carbon atoms), the tetradecyl group (14 carbon atoms), and the hexadecyl group (cetyl group) (16 carbon atoms). X - For example, chloride ions can be cited. A specific example of (B-2) is cetylpyridinium chloride.

[0027] [(B-3)] (B-3) is an amine oxide having one hydrocarbon group having 6 to 24 carbon atoms (preferably 12 to 18 carbon atoms) which may be substituted, and two hydrocarbon groups having 1 to 3 carbon atoms, which may be the same or different and may be substituted. Examples of substituents on each hydrocarbon group include hydroxyl groups.

[0028] Specific examples of (B-3) include compounds represented by the following general formulas (B3-1) and (B3-2). TIFF0007862075000009.tif4185 TIFF0007862075000010.tif40113

[0029] R in each general formula 1 This is a linear or branched alkyl group having 8 to 18 carbon atoms (preferably 10 to 14), or a linear or branched alkenyl group having 8 to 18 carbon atoms. The alkyl group and alkenyl group may be substituted. Substituents include -CONR 5 -, -NR 5 CO-, -COO-, or -OCO-(R 5 Examples include hydrogen atoms or alkyl groups having 1 to 3 carbon atoms, or hydroxyl groups. R in each general formula 2 and R 3Each of these is independently an alkyl group having 1 to 3 carbon atoms (preferably a methyl group), or a hydroxyalkyl group having 1 to 3 carbon atoms. In general formula (B3-2), R 4 is an alkylene group with 1 to 5 carbon atoms, and Y is -CONR 5 -, -NR 5 CO-, -COO-, or -OCO-(R 5 (This is a hydrogen atom or an alkyl group having 1 to 3 carbon atoms.) In general formula (B3-2), R 1 -YR 4 The number of carbon atoms in the group represented by - is preferably 10 to 24, more preferably 10 to 18, and particularly preferably 10 to 16.

[0030] A specific example of a compound represented by the general formula (B3-1) is alkyldimethylamine oxide (number of carbon atoms in the alkyl group: 8 to 18). Specific examples of compounds represented by general formula (B3-2) include alkylamidopropyldimethylamine oxide (alkylamidopropyl group has 8 to 18 carbon atoms).

[0031] Specific examples of (B-3) include dodecyldimethylamine oxide and tetradecyldimethylamine oxide (myristyldimethylamine oxide).

[0032] (B) Component is a known substance, readily available on the market, or can be prepared. Component (B) may be a single type or a combination of multiple types (for example, a mixture of (B-1), (B-2), and (B-3)).

[0033] The content of component (B) is preferably more than 0% by mass and less than 2% by mass, more preferably 0.01% by mass and less than 2% by mass, even more preferably 0.05% to 1% by mass, and particularly preferably 0.1% to 0.5% by mass, relative to the total mass of the liquid fabric softener composition. Setting the content to more than 0% by mass and less than 2% by mass allows for the achievement of superior formulation objectives while suppressing the occurrence of patchy separation in the liquid fabric softener composition during long-term storage.

[0034] [The ratio of component (B) to component (A)] The mass ratio (B / A) of component (B) to component (A) is preferably 0.001 to 0.2, more preferably 0.005 to 0.1, and particularly preferably 0.01 to 0.06. When the B / A ratio is 0.001 or higher, the effect of the (B) component is enhanced. When the B / A ratio is 0.2 or less, the occurrence of patchy separation in liquid fabric softener compositions during long-term storage can be further suppressed.

[0035] [(C) component] Component (C) is at least one compound selected from the group consisting of (C-1) to (C-3) described later. Component (C) is included to suppress the occurrence of patchy separation in liquid fabric softener compositions during long-term storage (which is likely to occur when component (D) is included in the amounts described later).

[0036] (C-1) (C-1) is an ester of an aliphatic carboxylic acid having 6 to 24 carbon atoms or an aromatic carboxylic acid having 7 to 24 carbon atoms, and an aliphatic alcohol having 1 to 24 carbon atoms and being monovalent to hexavalent, or an aromatic alcohol having 7 to 24 carbon atoms.

[0037] The aliphatic carboxylic acid has 6 to 24 carbon atoms, preferably 6 to 18, and more preferably 8 to 16. The hydrocarbon groups constituting the aliphatic carboxylic acid may be linear or branched, and may contain unsaturated carbon bonds. Examples of aliphatic carboxylic acids include caprylic acid (8 carbon atoms), capric acid (10 carbon atoms), myristic acid (14 carbon atoms), palmitic acid (16 carbon atoms), and stearic acid (18 carbon atoms), with caprylic acid, capric acid, and myristic acid being preferred.

[0038] The aromatic carboxylic acid has 7 to 24 carbon atoms, preferably 7 to 18, and more preferably 7 to 12. Benzoic acid is preferred as the aromatic carboxylic acid.

[0039] The aliphatic alcohol has 1 to 24 carbon atoms, preferably 2 to 22, and more preferably 3 to 20. The hydrocarbon groups constituting aliphatic alcohols may be straight-chain or branched-chain, and may contain unsaturated carbon bonds. The valency of the aliphatic alcohol is 1 to 6, preferably 1 to 3. If the valency of the aliphatic alcohol is 2 or higher, its hydroxyl group may form an ester with one type of carboxylic acid, or it may form an ester with different types of carboxylic acids. Specific examples of aliphatic alcohols include glycerin (a trihydric alcohol with 3 carbon atoms), octyldodecanol (a branched monohydric alcohol with 20 carbon atoms), isopropanol (a branched monohydric alcohol with 3 carbon atoms), pentaerythritol (a branched tetrahydric alcohol with 5 carbon atoms), sorbitol (a hexahydric alcohol with 6 carbon atoms), sorbitan (a branched tetrahydric alcohol with 6 carbon atoms), etc., with glycerin and octyldodecanol being preferred.

[0040] The aromatic alcohol has 7 to 24 carbon atoms, preferably 7 to 18, and more preferably 7 to 12. Benzyl alcohol is preferred as the aromatic alcohol.

[0041] Specific examples of (C-1) include tri(caprylic / capric acid) glyceryl, tricaprylate glyceryl, tricaprate glyceryl, tripalmitate glyceryl, trioleate glyceryl, octyldodecyl myristate, isopropyl myristate, and benzyl benzoate. Tri(caprylic / capric acid) glyceryl, tricaprylate glyceryl, tricaprate glyceryl, octyldodecyl myristate, and benzyl benzoate are preferred, and tri(caprylic / capric acid) glyceryl, tricaprylate glyceryl, and tricaprate glyceryl are even more preferred. Tri(caprylic / capric acid)glyceryl is an ester formed when a hydroxyl group in one molecule of glycerin combines with two types of carboxylic acids (caprylic acid and capric acid).

[0042] (C-1) may be a single type or a combination of multiple types (for example, a mixture of glyceryl tricaprylate and glyceryl tricaprate).

[0043] (C-2) (C-2) is a compound represented by the general formula (C2). R 6 -(AO) n -R 6 (C2) (In the formula, R 6 Each of these is independently an acyl group or acyloxy group derived from a fatty acid having 6 to 24 carbon atoms, H, or CH3. However, R 6 At least one of them is an acyl group or acyloxy group derived from a fatty acid having 6 to 24 carbon atoms. AO is an oxyalkylene group having 2 to 4 carbon atoms. n is between 2 and 100.

[0044] R 6 The acyl group or acyloxy group may be linear or branched, and may contain double or triple bonds. The number of carbon atoms in the acyl group and acyloxy group is preferably 10 to 20, and more preferably 12 to 18. R 6 Examples of fatty acids that form the basis of these include oleic acid, stearic acid, lauric acid, isostearic acid, coconut oil fatty acids, and caprylic acid. Specific examples of AO include oxyethylene groups, oxypropylene groups, and oxybutylene groups, with oxyethylene groups being preferred. (C-2) may contain multiple types of oxyalkylene groups (for example, oxyethylene groups and oxypropylene groups) as AO. n is preferably 3 to 80, more preferably 4 to 30, and particularly preferably 5 to 20. A specific example of (C-2) is PEG12 diisostearate (in general formula (C2), R 6Examples include compounds in which is an acyloxy group with 18 carbon atoms derived from isostearic acid, AO is an oxyethylene group, and n is 12, such as PEG-12 distearate, PEG-12 dioleate, PEG-12 dilaurate, PEG-75 dilaurate, and PEG-4 laurate, with PEG-12 diisostearate being preferred. (C-2) may use a single type or multiple types in combination.

[0045] (C-3) (C-3) is an alcohol with 12 to 24 carbon atoms. The number of carbon atoms in the (C-3) alcohol is preferably 14 to 20, more preferably 16 to 18. (C-3) may be an aliphatic alcohol or an aromatic alcohol. The hydrocarbon groups constituting aliphatic alcohols may be straight-chain or branched-chain, and may contain unsaturated carbon bonds. For (C-3), 1-hexadecanol (16 carbon atoms) is preferred. (C-3) may use a single type or multiple types in combination.

[0046] (C) Components are known substances, readily available on the market, or can be prepared. Component (C) may be a single type or a combination of multiple types (for example, a mixture of (C-1), (C-2), and (C-3)).

[0047] The content of component (C) is greater than 0% by mass and less than 1.1% by mass, preferably 0.001% by mass or more and less than 1.1% by mass, more preferably 0.01% by mass or more and less than 0.8% by mass, and particularly preferably 0.05% by mass or more and less than 0.5% by mass, relative to the total mass of the liquid softener composition. The purpose of the formulation can be achieved by setting the content to greater than 0% by mass and less than 1.1% by mass.

[0048] [(D) component] (D) Component is a fragrance that is not contained in the capsule (fragrance-free). Component (D) is added to the liquid fabric softener composition to add fragrance, and further to the textile product after treatment with the composition. In this case, component (D) may impart deodorizing properties to the textile product through the masking effect of its fragrance. However, as described later, component (D) is added in an amount that can suppress the fragrance remaining on the textile product after softening treatment. (D) As for the components, any fragrance commonly used in the liquid fabric softener field can be used and is not particularly limited. However, a list of usable fragrance raw materials can be found in various publications, such as "Perfume and Flavor Chemicals", Vol. I and II, Steffen Arctander, Allured Pub. Co. (1994), "Synthetic Fragrance: 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).

[0049] The ClogP value of component (D) is not particularly limited. Prior to the completion of the present invention, the inventors found that when the ClogP value of the fragrance is low (5.0 or less, especially 3.0 or less), patchy separation tends to occur inside the liquid fabric softener. However, even when using fragrances with such low ClogP values, the occurrence of patchy separation can be suppressed by following the present invention. Furthermore, if component (D) is a fragrance composition containing multiple types of fragrances, the aforementioned ClogP value of 5.0 or less means that the average ClogP value calculated from the ClogP values ​​of all fragrances contained in the fragrance composition is 5.0 or less. 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).

[0050] (D) The component may be a single type or multiple types may be used in combination (fragrance composition). The fragrance composition may contain solvents commonly used in liquid fabric softener compositions. Examples of solvents for fragrances include dipropylene glycol (DPG) and isopropyl myristerate (IPM).

[0051] The content of component (D) is greater than 0% by mass and less than 1.5% by mass, preferably 0.1% to 1.5% by mass, and more preferably 0.5% to 1.3% by mass, relative to the total mass of the liquid fabric softener composition. If the content of component (D) is greater than 0% by mass, the purpose of the formulation can be achieved, and if it is less than 1.5% by mass, the fragrance remaining on the textile product after softening treatment can be suppressed, while also suppressing the occurrence of patchy separation in the liquid fabric softener composition during long-term storage.

[0052] [Emulsified liquid fabric softener composition] The liquid fabric softener composition is of the emulsion type. "Emulsification" means that when a glass cell with a path length of 10 mm is used as the measurement cell and ion-exchanged water is placed in the control cell, the visible light transmittance (wavelength 660 nm) of the sample is less than 30%.

[0053] [Optional ingredients] The liquid fabric softener composition may contain the following optional components other than the essential components (A) to (D) above, as long as they do not impair the effects of the present invention.

[0054] [Polyoxyethylene alkyl ether] Polyoxyethylene alkyl ethers are added to improve the stability (particularly freeze-recovery) of the liquid fabric softener composition. As the polyoxyethylene alkyl ether, any component known in the field of liquid fabric softeners can be used without particular limitations. Examples include polyoxyethylene alkyl ethers having an alkyl or alkenyl group with 10 to 22 carbon atoms and an average number of ethylene oxide (EO) added of 10 to 100 moles. Among these, polyoxyethylene alkyl ethers having an alkyl group with 10 to 18 carbon atoms and an average number of EO added of 20 to 80 moles are preferred. Specific examples of polyoxyethylene alkyl ethers include primary isotridecyl alcohol (13 carbon atoms) to which an average of 60 moles of ethylene oxide (EO) have been added, primary isotridecyl alcohol to which an average of 40 moles of ethylene oxide (EO) have been added, and linear secondary alcohols with 12 to 14 carbon atoms in the alkyl group to which an average of 50 moles of EO have been added.

[0055] Polyoxyethylene alkyl ethers are well-known substances and readily available on the market. Commercially available products include those sold by Lion Chemical Co., Ltd., such as product name TA600-75 (EO60 molar adduct of primary isotridecyl alcohol (13 carbon atoms)) and product name Rheocol TDA-400-75 (EO40 molar adduct of primary isotridecyl alcohol). Polyoxyethylene alkyl ethers may be used individually or in combination of multiple types. The content of polyoxyethylene alkyl ether is not particularly limited as long as the formulation objective is achieved, but is preferably 0.2 to 10.0% by mass, more preferably 1.0 to 7.0% by mass, and even more preferably 1.5 to 4.0% by mass, based on the total mass of the liquid softener composition.

[0056] [Polyoxyethylene alkylamine] Polyoxyethylene alkylamines are added to improve the stability (particularly freeze-recovery) of the liquid fabric softener composition. As the polyoxyethylene alkylamine, any component known in the field of liquid fabric softeners can be used without particular restriction. Specifically, examples include polyoxyethylene alkylamines having an average number of added EO moles of 10 to 100 moles. Polyoxyethylene alkylamines are well-known substances and readily available on the market. Polyoxyethylene alkylamines may be used individually or in combination of multiple types. The content of polyoxyethylene alkylamine is not particularly limited as long as the formulation objective is achieved, but is preferably 0.2 to 10.0% by mass, more preferably 1.0 to 7.0% by mass, and even more preferably 1.5 to 4.0% by mass, based on the total mass of the liquid softener composition.

[0057] [Dextrins] Dextrins are structural viscosity modifiers and are added to improve the dispersibility of functional capsules. Dextrins are also deodorants and are added to textile products to impart deodorizing properties. Examples of dextrins include cyclodextrins and highly branched cyclic dextrins. Highly branched cyclic dextrins are glucans with a degree of polymerization ranging from 50 to 10,000, having an internally branched cyclic structure and an externally branched structure, where the internally branched cyclic structure is a cyclic glucan chain formed by α-1,4-glucosidic bonds and α-1,6-glucosidic bonds, and the externally branched structure is an acyclic glucan chain bonded to the internally branched cyclic structure. Examples of highly branched cyclic dextrins include cluster dextrin (manufactured by Glico Nutrition Foods Co., Ltd.). Dextrins are well-known substances and are readily available on the market. Dextrins may be used individually or in combination of multiple types. The content of dextrins is not particularly limited as long as the purpose of formulation is achieved, but it is preferably 0.1 to 3% by mass of the total mass of the liquid softener composition.

[0058] [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. The preservative content 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 fabric softener composition. If it is 0.0001% by mass or more, the preservative effect 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.

[0059] [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.

[0060] [Water-soluble solvent] Water-soluble solvents are added to further improve the stability of the liquid fabric softener composition, particularly to further improve its freeze-recoverability. 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, those selected from the group consisting of 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) are preferred. 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.) As water-soluble solvents, ethanol, ethylene glycol, butyl carbitol, propylene glycol, dipropylene glycol monomethyl ether, and diethylene glycol monobutyl ether are more preferred. The content of the water-soluble solvent is not particularly limited as long as it is sufficient to achieve the formulation purpose, but is preferably more than 0% by mass and less than 5% by mass, and more preferably 0.1% to 3% by mass, relative to the total mass of the liquid softener composition. When the content of the water-soluble solvent is less than 5% by mass, the storage stability of the liquid softener composition, in particular its freeze-recoverability, can be improved.

[0061] [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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 〔water〕 The liquid fabric softener composition is preferably an aqueous composition containing water. Tap water, deionized water, purified water, or distilled water can be used as the water source, but deionized water is preferred. 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 fabric softener composition. When the water content is 50% by mass or more, the handling properties are improved.

[0068] [Silicone compounds] Silicone compounds are added primarily to further improve fragrance longevity. The silicone compound can be any known component in the field of liquid softener compositions without any particular limitations. The molecular structure of the silicone compound may be linear or branched, and may also be crosslinked. The silicone compound may be a modified silicone compound. The modified silicone compound may be modified with one or more organic functional groups. The silicone compound may be an oil or an emulsion dispersed with any emulsifier. Specific examples of silicone compounds include dimethyl silicone, polyether-modified silicone, methylphenyl silicone, alkyl-modified silicone, higher fatty acid-modified silicone, methyl hydrogen silicone, fluorine-modified silicone, epoxy-modified silicone, carboxy-modified silicone, carbinol-modified silicone, and amino-modified silicone. From the viewpoint of versatility and improved fragrance persistence, polyether-modified silicones, amino-modified silicones, and dimethyl silicones are preferred. From the viewpoint of further improving fragrance persistence and handling during manufacturing, polyether-modified silicones and amino-modified silicones are preferred.

[0069] The kinematic viscosity of dimethyl silicone is not particularly limited, but is generally between 1 and 100,000,000 mm². 2 / s is preferred, and 10 to 10,000,000 mm 2 / s is more preferable, 100~1,000,000mm 2 / s is even more preferable. Dimethyl silicone may be in the form of an oil or an emulsion.

[0070] Specific examples of polyether-modified silicones include copolymers of alkylsiloxanes and polyoxyalkylenes. The alkyl group of the alkylsiloxane preferably has 1 to 3 carbon atoms. The alkylene group of the polyoxyalkylene preferably has 2 to 5 carbon atoms. Preferred polyether-modified silicones include copolymers of dimethylsiloxane and polyoxyalkylene (such as polyoxyethylene, polyoxypropylene, or random or block copolymers of ethylene oxide and propylene oxide). Specific examples include compounds represented by the following general formula (I). TIFF0007862075000011.tif2587 (wherein M, N, a, and b are each independently the average degree of polymerization, and R is hydrogen or an alkyl group) In general formula (I), M is between 10 and 10,000, preferably between 100 and 300. N is between 1 and 1,000, preferably between 1 and 100. Furthermore, it is preferable that M > N. a is between 2 and 100, preferably between 2 and 50. b is between 0 and 50, preferably between 0 and 10. R is preferably hydrogen or an alkyl group having 1 to 4 carbon atoms. Polyether-modified silicones represented by general formula (I) can generally be produced by adding an organohydrogenpolysiloxane having a Si-H group to a polyoxyalkylene alkyl ether having a carbon-carbon double bond at its terminus, such as polyoxyalkylene allyl ether, under platinum catalyst. In this case, the product may contain small amounts of unreacted polyoxyalkylene alkyl ether or organohydrogenpolysiloxane having a Si-H group. Since organohydrogenpolysiloxane having a Si-H group is highly reactive, its amount in the polyether-modified silicone is preferably 30 ppm or less (as the amount of Si-H).

[0071] A preferred polyether-modified silicone is a linear polysiloxane-polyoxyalkylene block copolymer represented by the following general formula (II). TIFF0007862075000012.tif21122 (wherein A, B, h, and i are the average degrees of polymerization, R is an alkyl group, and R' is hydrogen or an alkyl group.) In general formula (II), A is between 5 and 10,000. B is between 2 and 10,000. h is between 2 and 100. i ranges from 0 to 50. R is preferably an alkyl group having 1 to 5 carbon atoms. R' is preferably hydrogen or an alkyl group having 1 to 4 carbon atoms. A linear polysiloxane-polyoxyalkylene block copolymer represented by general formula (II) can be produced by reacting a polyoxyalkylene compound having a reactive end group with a dihydrocarbylsiloxane having an end group that reacts with the reactive end group of the compound. The viscosity of such polyether-modified silicones increases with the length of the polyoxyalkylene side chains and the degree of polymerization of the polysiloxane chains. Therefore, to improve workability during production and facilitate blending into aqueous compositions, it is preferable to blend them in the form of a premix with a water-soluble organic solvent. Examples of water-soluble organic solvents include ethanol, dipropylene glycol, and butyl carbitol.

[0072] Specific examples of polyether-modified silicones include SH3772M, SH3775M, FZ-2166, FZ-2120, L-720, SH8700, L-7002, L-7001, SF8410, FZ-2164, FZ-2203 and FZ-2208 from Toray Dow Corning Co., Ltd., KF352A, KF615A, X-22-6191, X-22-4515, KF-6012 and KF-6004 from Shin-Etsu Chemical Co., Ltd., and TSF4440, TSF4441, TSF4445, TSF4450, TSF4446, TSF4452 and TSF4460 from Momentive Performance Materials Japan LLC.

[0073] Amino-modified silicones are formed by introducing amino groups to the terminal or side chains of a dimethyl silicone skeleton. Other substituents such as hydroxyl groups, alkyl groups, or phenyl groups may also be introduced. The amino-modified silicone may be an oil, or it may be an emulsion emulsified with an emulsifier (such as a nonionic surfactant or a cationic surfactant). A preferred base oil in an amino-modified silicone oil or emulsion is a compound represented by the following general formula (III). TIFF0007862075000013.tif2671 (in the formula, R 1 and R 6These are a methyl group, a hydroxyl group, or a hydrogen atom, which may be the same or different from each other. R 2 is, -(CH2) n -A 1 , or -(CH2) n -NHCO-(CH2) m -A 1 (In each formula, A 1 is -N(R 3 )(R 4 ), -N + (R 3 )(R 4 )(R 5 )·X - (In each formula, R 3 , R 4 and R 5 These may be the same or different, and may be a hydrogen atom, an alkyl group having 1 to 12 carbon atoms, a phenyl group, or -(CH2) n -NH2 (where n is between 0 and 12), X - (wherein is a fluoride ion, chloride ion, bromide ion, iodide ion, methyl sulfate ion, or ethyl sulfate ion), and the values ​​of m and n may be the same or different, and are integers from 0 to 12. p and q represent the degree of polymerization of the polysiloxane, and may be the same or different. p is between 0 and 20000, preferably between 10 and 10000, and q is between 1 and 500, preferably between 1 and 100.

[0074] The kinematic viscosity of amino-modified silicone oil at 25°C is 50-20000 mmHg. 2 It is preferable that it be / s, and 100 to 10000 mm 2 A kinematic viscosity of / s is more preferable. When the kinematic viscosity is within this range, a high fragrance persistence effect is achieved, as well as good manufacturability and ease of handling of the product.

[0075] As amino-modified silicones, commercially available products can be used. Examples of amino-modified silicone oil products include SF-8417, BY16-892, and BY16-890 from Toray Dow Corning Ltd., and KF-864, KF-860, KF-8004, KF-8002, KF-8005, KF-867, KF-861, KF-880, and KF-867S from Shin-Etsu Chemical Co., Ltd. Examples of amino-modified silicone emulsion products include SM8904, BY22-079, FZ-4671 and FZ-4672 from Toray Dow Corning Co., Ltd., the Polon series (PolonMF-14, PolonMF-29, PolonMF-14D, PolonMF-44, PolonMF-14EC, PolonMF-52) from Shin-Etsu Chemical Co., Ltd., and WACKER FC201 from Asahi Kasei Wacker Silicone Co., Ltd.

[0076] The silicone compound may be of a single type or multiple types may be used in combination. The content of the silicone compound is not particularly limited as long as it is sufficient to achieve the formulation purpose, but is preferably 0.01 to 10% by mass, more preferably 0.05 to 8% by mass, and especially preferably 0.1 to 5% by mass, relative to the total mass of the liquid softener composition.

[0077] [Antibacterial agents excluding component (B)] Antibacterial agents are added to impart higher antibacterial properties to textile products and to improve the shelf life of liquid fabric softener compositions. As antibacterial agents, any known components in the field of liquid fabric softeners can be used without particular restriction. Specific examples include diclosan, triclosan, bis-(2-pyridylthio-1-oxide)zinc, 8-oxyquinoline, biguanide compounds (e.g., polyhexamethylene biguanide), chlorohexidine hydrochloride, and polylysine. Among these, biguanide compounds and chlorohexidine hydrochloride are preferred. The content of the antibacterial agent is not particularly limited as long as the purpose of formulation is achieved, but is preferably 0.001 to 5% by mass relative to the total mass of the liquid softener composition.

[0078] [pH of liquid fabric softener composition] The pH of the liquid fabric softener composition is not particularly limited, but from the viewpoint of suppressing the 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.

[0079] [Viscosity of liquid fabric softener composition] The viscosity of the liquid softener composition is not particularly limited, but from the viewpoint of improving its usability, separation stability, and dispersion stability of functional capsules, it is preferable that the viscosity (at 25°C) measured with a B-type viscometer (manufactured by TOKIMEC, rotor No. 2, spindle rotation speed 30 rpm) is 1 to 1000 mPa·s.

[0080] [TI value of liquid fabric softener composition] The liquid softener composition is calculated using the following formula, and the TI value, which is an indicator reflecting thixotropy, is preferably 1.0 to 5.0, more preferably 2.0 to 4.0. In the formula, 6 rpm and 60 rpm are the spindle rotation speeds of a B-type viscometer (manufactured by TOKIMEC, rotor No. 2). TI value = (viscosity value at 6 rpm) / (viscosity value at 60 rpm) For Newtonian fluids like water, where viscosity does not change even when the shear rate (spindle rotation speed) changes, the TI value is 1. A TI value greater than 1 indicates that the viscosity is higher at lower shear rates compared to higher shear rates (i.e., it exhibits thixotropy). If the TI value of the liquid fabric softener composition is 2.0 or higher, excellent thixotropy is obtained, and the dispersion stability of the functional capsules is improved. If the TI value is 5.0 or lower, while maintaining the improved dispersion stability of the functional capsules due to excellent thixotropy, problems such as difficulty in dispensing the liquid fabric softener composition into the cap during measurement can be suppressed.

[0081] [Manufacturing method] 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), (C), and (D) with an aqueous phase under conditions of a temperature above the melting point of component (A), and then adding and mixing other components as needed to the resulting emulsion to produce a liquid softener composition. (C) It is preferable to add component (C) to the oil phase beforehand, before the emulsion is formed.

[0082] [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]

[0083] The present invention will be described in more detail below with reference to examples, but the present invention is not limited thereto. In the examples and comparative examples, the amounts of each component are all expressed in mass percent (on a pure content basis unless otherwise specified).

[0084] [Component (A)] The following A-1 to A-2 were used. A-1: A cationic surfactant synthesized according to the procedure 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) (wherein R is present in each formula). 9 The composition contains a quaternary merization of an alkyl or alkenyl group having 15 to 17 carbon atoms with dimethyl sulfate. A-2: Product name "Stepantex SE-88", manufactured by Stepan. A-2 is a compound represented by general formulas (A1-3), (A1-4), and (A1-5) (where R is in each formula). 9 The composition contains a quaternary merization of an alkyl or alkenyl group having 15 to 17 carbon atoms with dimethyl sulfate.

[0085] [(B) component] The following B-1 to B-3 and B-5 were used. B-1: Hexadecyltrimethylammonium chloride (Lipocard 16-29; manufactured by Lion Specialty Chemicals). B-1 is general formula (B1) (wherein R 1 It is a hexadecyl group (16 carbon atoms), R 2 , R 3 and R 4 X is a methyl group, - It is a compound represented by (where is a chloride ion). B-2: Myristyldimethylamine oxide (Cadenax DM14D-N; manufactured by Lion Specialty Chemicals). B-2 is an amine oxide having one myristyl group (14 carbon atoms) and two methyl groups. B-2 is represented by the general formula (B3-1) (wherein R 1 R is a myristyl group, 2 and R 3 It is also a compound represented by (where is a methyl group). B-3: Didecyldimethylammonium chloride (Lipocard 210-50E; manufactured by Lion Specialty Chemicals). B-3 is general formula (B1) (wherein R 1 and R 2 It is a decyl group (10 carbon atoms), R 3 and R 4 X is a methyl group, - It is a compound represented by (where is a chloride ion). B-5: Cetylpyridinium chloride (manufactured by Wako Pure Chemical Industries). B-5 is general formula (B2) (wherein R 5 It is a cetyl group (16 carbon atoms), X - It is a compound represented by (where is a chloride ion).

[0086] [(C) component] The following C-1-1 to C-3 were used. C-1-1: Tri(caprylic / capric acid)glyceryl (NIKKOL Triester F-810; manufactured by NIKKO CHEMICALS). C-1-1 is an ester formed when a hydroxyl group in one molecule of glycerol is bonded to two types of carboxylic acids (caprylic acid and capric acid). C-1-2: Octyldodecyl myristate (NIKKOL ODM-100; manufactured by NIKKO CHEMICALS) C-1-3: Benzyl Benzoate (manufactured by Tokyo Chemical Industry Co., Ltd.). C-1-3 is benzyl benzoate. C-2: Nonionic DIS-600 (manufactured by NOF Corporation). C-2 is PEG12 diisostearate (in general formula (C2), R 6 (This is a compound in which isostearic acid, has an 18-carbon acyloxy group, AO is an oxyethylene group, and n is 12.) C-3: 1-Hexadecanol (manufactured by Tokyo Chemical Industry Co., Ltd.). C-3 is 1-hexadecanol (16 carbon atoms).

[0087] [(D) component] Fragrance composition D-1 having the composition shown in the table below was used. The numerical values ​​for each fragrance component in the table represent the mass % relative to the total mass of fragrance composition D-1. The average ClogP value of the fragrances constituting D-1 was 3.0. TIFF0007862075000014.tif187156

[0088] [Other ingredients] The following common ingredients were used. The values ​​in the table represent the values ​​relative to the total mass of the liquid fabric softener composition.

[0089] TIFF0007862075000015.tif78146

[0090] [Method for preparing a liquid fabric softener composition] A liquid fabric softener composition having the composition shown in Table 1 below was prepared. In Table 1, the units of the numerical values ​​for each component are in mass % of the total mass of the liquid fabric softener composition. In Table 1, "B / A" indicates the mass ratio of component (B) to component (A).

[0091] A liquid softener composition was prepared using a glass container (100 mm inner diameter, 150 mm height) and a stirrer (Agitator SJ type, manufactured by Shimadzu Corporation) according to the following procedure. First, components (A), (B), (C), (D), and a nonionic surfactant were mixed and stirred to obtain an oil phase mixture. On the other hand, a preservative was dissolved in deionized water for balancing to obtain an aqueous phase mixture. The mass of the deionized water for balancing corresponded to the remainder after subtracting the amount of the oil phase mixture from 980g. Next, the oil phase mixture, heated to above the melting point of component (A), was placed in a glass container and stirred. The aqueous phase mixture, also heated to above the melting point of component (A), was added in two portions and stirred. The ratio of the aqueous phase mixture was 30:70 (by mass), and stirring (at a rotation speed of 1,000 rpm) was performed for 3 minutes after the first addition of the aqueous phase mixture and for 2 minutes after the second addition of the aqueous phase mixture. Subsequently, common components other than preservatives were added, and 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 3.0 (25°C). Furthermore, deionized water was added to bring the total mass to 1,000 g to obtain the desired liquid fabric softener composition. Upon visual inspection of their appearance, each liquid softener composition in the examples and comparative examples was found to be opaque, as it was not transparent but rather cloudy to the extent that it could be immediately determined that its visible light transmittance under the aforementioned conditions was less than 30%. The "fragrance intensity," "deodorizing properties," and "storage stability (occurrence of patchy separation)" of each liquid fabric softener composition were evaluated according to the following procedure.

[0092] [Evaluation of fragrance intensity] 1. Softening treatment of evaluation fabric 1-1. Pretreatment A commercially available cotton towel (manufactured by Toshinsha) was used as the evaluation cloth. The evaluation cloth was subjected to the following pretreatment three times using a commercially available detergent "Top Platinum Clear" (manufactured by Lion Corporation) and a twin-tub washing machine (Toshiba VH-30S). Pretreatment: Wash with standard detergent amount, 30 times the bath ratio, 45°C tap water (10 minutes), followed by a rinse with water (10 minutes), repeating this cycle twice. 1-2. Flexibility treatment The pre-treated evaluation fabric was washed (10 minutes, standard usage amount, standard course, bath ratio 30 times, using 25°C tap water) using a twin-tub washing machine (Toshiba VH-30S) and commercially available detergent "Top Platinum Clear" (Lion Corporation), and then spun dry (1 minute). Subsequently, a first rinse (3 minutes), spin dry (1 minute), and a second rinse (3 minutes) were performed. At the start of the second rinse, each liquid fabric softener composition was added and a softening treatment was performed (3 minutes, 10 ml of fabric softener used per 1.5 kg of fabric, bath ratio 20 times, using 25°C tap water). After the softening treatment, the fabric was spun dry (1 minute), and the evaluation fabric removed from the twin-tub washing machine was dried (18 hours) under constant temperature and humidity conditions (20°C, 40% RH) before being subjected to evaluation of fragrance intensity.

[0093] 2. Evaluation of the fragrance intensity of the treated fabric. The fragrance intensity of the dried evaluation cloth was sensory-evaluated according to the evaluation criteria below. The average score (calculated to one decimal place) of eight expert panelists was applied to the judgment criteria below to determine the fragrance intensity. The judgment results are shown in the "Fragrance Intensity" column of Table 1. From a commercial value perspective, a score of ○ or higher was considered acceptable. <Evaluation Criteria> 0: Odorless 1: A scent that is barely detectable 2: A scent that is recognizable. 3: Easily detectable scents 4: Strong scent 5: Intense scent <Judgment criteria> ◎: Less than 3 points ○: 3 points or more but less than 4 points ×: 4 points or more

[0094] [Evaluation of odor-resistant properties] 1. Softening treatment of evaluation fabric 1-1. Pretreatment A commercially available cotton undershirt (manufactured by BVD) was used as the evaluation fabric. The evaluation fabric was subjected to the following pretreatment three times using a commercially available detergent "Top Platinum Clear" (manufactured by Lion Corporation) and a twin-tub washing machine (manufactured by Toshiba, model VH-30S). Pretreatment: Wash with standard detergent amount, 30 times the bath ratio, 45°C tap water (10 minutes), followed by a rinse with water (10 minutes), repeating this cycle twice. 1-2. Flexibility treatment The pre-treated evaluation cloth was cut in half into cloth piece A and cloth piece B. Cloth piece B was subjected to the following softening treatment with the liquid softener composition of Comparative Example 1, and cloth piece A was subjected to the following softening treatment with the liquid softener composition of either the example or another comparative example. The pre-treated fabric pieces were washed in a twin-tub washing machine (Toshiba VH-30S) with the commercially available detergent "Top Platinum Clear" (Lion Corporation) for 10 minutes (standard usage amount, standard course, bath ratio 30 times, using 25°C tap water), and then spun dry for 1 minute. Subsequently, a first rinse (3 minutes), spin dry (1 minute), and a second rinse (3 minutes) were performed. At the start of the second rinse, each liquid fabric softener composition was added for softening treatment (3 minutes, 10 ml of fabric softener used per 1.5 kg of fabric, bath ratio 20 times, using 25°C tap water). After softening treatment, the fabric pieces were spun dry for 1 minute and removed from the twin-tub washing machine. The fabric pieces were then dried under constant temperature and humidity conditions (20°C, 40% RH) for 1 day. After drying, fabric pieces A and B were sewn together to make a shirt, which was then subjected to the following odor-resistant evaluation.

[0095] 2. Evaluation of the odor-resistant properties of the evaluation fabric. Five men in their 20s and 30s were asked to wear an undershirt for one day. The odor of the undershirt after wearing (unpleasant odors such as sebum odor and sweat odor) was subjected to a sensory pairwise comparison according to the evaluation criteria below. The average score (calculated to one decimal place) of four expert panelists was applied to the following criteria to determine the odor-resistant properties. The results are shown in the "Odor-Resistant Properties" column of Table 1. In terms of commercial value, a score of ○ or higher was considered acceptable. <Evaluation Criteria> 2: Clearly better than the control. 1: Slightly better than the control. 0: Almost identical to the control. -1: The control group performed slightly better. -2: The control group is clearly better. (The control is the odor of cloth piece B treated with the liquid fabric softener composition of Comparative Example 1.) <Judgment criteria> ◎◎:2.0 points ◎: 1.5 points or more, less than 2.0 points ○: 1.0 points or more, less than 1.5 points △: 0.5 points or more, less than 1.0 point ×: Less than 0.5 points

[0096] [Storage stability (deterioration of appearance due to mottled separation)] Evaluator samples were prepared by placing 80 mL of the liquid fabric softener composition into a lightweight glass bottle (PS-No.11, manufactured by Tanuma Glass Industry Co., Ltd.) and sealing it tightly. The evaluation samples were subjected to a durability test (three temperature change cycles: 12 hours of static storage at 5°C, followed by 12 hours of static storage at 40°C, and then 6 hours of static storage at 5°C). The state of the liquid after the durability test was visually evaluated according to the evaluation criteria below. The average score (calculated to one decimal place) of eight expert panelists was applied to the judgment criteria below to determine storage stability. The judgment results are shown in the "Spot Separation" column of Table 1. From a commercial value perspective, a score of ○ or higher was considered acceptable. <Evaluation Criteria> 3: It remains completely unchanged compared to before the durability test. 2: There is almost no change compared to before the durability test, but slight separation of the mottled appearance can be seen when illuminated with light. 1: There is almost no change compared to before the durability test, but when light is shone on it, a considerable amount of mottled separation is visible. 0: Compared to before the durability test, significant separation of the mottled pattern is visible even without light. <Judgment criteria> ◎◎: 2.5 points or higher ◎: 2.0 points or higher, less than 2.5 points ○: 1.5 points or more, less than 2.0 points △: 1.0 points or more, less than 1.5 points ×: Less than 1.0 points [Industrial applicability]

[0097] This invention is applicable to the field of fabric softeners.

[0098] [Table 1]

Claims

1. A liquid fabric softener composition, The following ingredients (A) to (D): (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 compound selected from the group consisting of (B-1) to (B-3) below: (B-1) Compounds represented by general formula (B1): (In the formula, R 1 This is a hydrocarbon group having 6 to 24 carbon atoms. R 2 These are a hydrocarbon group having 6 to 24 carbon atoms, a benzyl group, an alkyl group having 1 to 3 carbon atoms, or a hydroxyalkyl group having 1 to 3 carbon atoms. R 3 and R 4 These are independently C1-C3 alkyl groups or C1-C3 hydroxyalkyl groups. X - (This is an anionic group.) (B-2) Compounds represented by general formula (B2): (In the formula, R 5 This is a hydrocarbon group having 8 to 18 carbon atoms. X - (This is an anionic group.) (B-3) Amine oxide having one optionally substituted hydrocarbon group having 6 to 24 carbon atoms and two identical or different optionally substituted hydrocarbon groups having 1 to 3 carbon atoms; (C) The following (C-1) components: (C-1) Esters of aliphatic carboxylic acids having 6 to 24 carbon atoms and monohydric aromatic alcohols having 7 to 24 carbon atoms. Esters of aromatic carboxylic acids having 7 to 24 carbon atoms and monovalent to hexavalent aliphatic alcohols having 1 to 24 carbon atoms, and At least one compound selected from the group consisting of esters of aromatic carboxylic acids having 7 to 24 carbon atoms and monohydric aromatic alcohols having 7 to 24 carbon atoms; (D) Contains fragrance-free, The content of component (C) is 0.001% by mass or more and less than 0.8% by mass, relative to the total mass of the liquid softener composition. (D) The content of component is greater than 0% by mass and less than 1.5% by mass relative to the total mass of the liquid softener composition, A liquid fabric softener composition characterized by being of the emulsion type.

2. In component (C-1), The aromatic carboxylic acid is benzoic acid, and / or The liquid softener composition according to claim 1, wherein the aromatic alcohol is benzyl alcohol.

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