Liquid fabric softener composition

Abstract

To provide a liquid softener composition capable of moderately controlling fragrance intensity at the bottle opening while maintaining good residual fragrance properties after washing and dehydration.SOLUTION: There is provided a liquid softener composition which comprises the following components (A) to (C): (A) a cationic surfactant; (B) a nonionic polymer having a urethane skeleton; (C) a perfume composition which contains at least one or more perfume components having a vapor pressure of 0.001 mmHg or more at 25°C and a carbonyl group and / or an ether group and contains 10 mass% or more of the perfume component, wherein the content of the component (B) is more than 0.01 mass% and the content of the component (C) is 0.1 to 5 mass%.SELECTED DRAWING: None

Description

[Technical Field]

[0001] This invention relates to a liquid fabric softener composition. More specifically, it relates to a liquid fabric softener composition that can moderately suppress the fragrance intensity at the bottle opening while maintaining good residual fragrance after washing and spinning. [Background technology]

[0002] In recent years, with the growing interest in fragrances, fabric softeners are required to have a strong and long-lasting scent on the washed items. To meet these demands, formulations have generally been developed that increase the amount of fragrance used or utilize specific long-lasting fragrances (Patent Document 1). Furthermore, technologies for improving the delivery efficiency of beneficial agents such as fragrances are known (Patent Document 2). [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Special Publication No. 8-502522 [Patent Document 2] Special Publication No. 2010-529250 [Overview of the project] [Problems that the invention aims to solve]

[0004] However, with conventional technology, while the lingering fragrance on clothes after washing and spinning may improve, a problem can arise where the fragrance intensity at the bottle opening is too strong, making it undesirable. Therefore, the object of the present invention is to provide a fabric softener composition that can moderately suppress the fragrance intensity at the bottle opening while maintaining good lingering fragrance after washing and spinning. [Means for solving the problem]

[0005] As a result of diligent research, the inventors of the present invention have found that the above problem can be solved by combining a urethane-based nonionic polymer and a specific fragrance with a fabric softener composition containing a cationic surfactant as a softening base material. The present invention relates, for example, to the following [1] to [3]. [1] The following components (A) to (C): (A) Cationic surfactants; (B) Nonionic polymer having a urethane skeleton; and (C) A fragrance composition containing at least one fragrance component having a vapor pressure of 0.001 mmHg or more at 25°C and having a carbonyl group and / or an ether group, wherein the fragrance composition contains 10% by mass or more of the said fragrance component. A liquid fabric softener composition containing (B) and having a content of (C) of 0.1% to 5% by mass, wherein the content of (B) is greater than 0.01% by mass and the content of (C) is between 0.1% and 5% by mass. [2] The liquid fabric softener composition according to [1], wherein the vapor pressure of the fragrance component in component (C) at 25°C is 0.005 mmHg or more. [3] The liquid softener composition according to [1] or [2], wherein the content of component (B) is 0.02% by mass or more. [Effects of the Invention]

[0006] According to the liquid fabric softener composition of the present invention, it is possible to moderately suppress the fragrance intensity at the bottle opening while maintaining good residual fragrance after washing and spinning. [Modes for carrying out the invention]

[0007] [(A) component] In the liquid fabric softener composition of the present invention, component (A) is added to impart to the liquid fabric softener composition the effect of imparting flexibility (texture) to textile products (i.e., the original function of a fabric softener). Component (A) is specifically "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." Among these, salts of tertiary amines or quaternary compounds thereof having at least one hydrocarbon group having 10 to 26 carbon atoms separated by an ester group or an amide group are preferred. The number of carbon atoms in a hydrocarbon group having 10 to 26 carbon atoms (hereinafter sometimes referred to as a "long-chain hydrocarbon group" in this specification) is preferably 16 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. Long-chain hydrocarbon groups are fragmented by fragmenting groups. Fractionation may occur in one or more locations. The fragmenting groups are either ester groups (-COO-) or amide groups (-NHCO-). If a long-chain hydrocarbon group has two or more fragmenting groups, these groups may be the same or different. The carbon atoms in the fragmenting groups are counted towards the total carbon count 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.

[0008] Examples of the amine compound include a compound represented by the following general formula (A1). [Chemical formula] (In the formula, R 4 , 4 , 4 , n , 3 , 4 , , 4 , , 1 , 4 , 4 , 4 , 5 , 4 , 4 , ~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​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​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 50 / 50. 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 can be used 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 50 / 50. (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 70% 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.

[0009] In general formula (A1), R 1 ~R 3 Of these, at least one is -CH2CH(Y)OCOR 4 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.

[0010] 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 10Each of these is independently a hydrocarbon group having 7 to 21 carbon atoms.

[0011] 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 R in the formula 9 When there are multiple R 9 They may be identical to each other, or they may be different to each other.

[0012] Component (A) of the present invention may be a salt of an amine compound. A salt of a tertiary amine compound is preferred as the salt. Salts of amine compounds are obtained by neutralizing the amine compound with an acid. The acid used for neutralizing the amine compound 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.

[0013] Component (A) may be a quaternary amine compound. A quaternary amine compound is preferred as the quaternary amine compound. Quaternized amine compounds are obtained by reacting the amine compound with a quaternizing agent. Examples of quaternizing agents used for quaternizing amine compounds include alkyl halides such as methyl chloride, and dialkyl sulfates such as dimethyl sulfate. When these quaternizing agents react with an amine compound, the alkyl group of the quaternizing agent is introduced to the nitrogen atom of the amine compound, forming a salt of a quaternary ammonium ion and a halogen ion or monoalkyl sulfate ion. 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. Quaternization of amine compounds can be carried out by known methods.

[0014] 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.

[0015] 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 (A1). 4 It 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.

[0016] 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 (A1) 4 It 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.

[0017] (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.

[0018] Component (A) may be a single amine compound, its salt, or its quaternary derivative, or it may be a mixture of two or more compounds, for example, a mixture of compounds represented by general formulas (A1-3) to (A1-5). (A) The amount of component is not particularly limited as long as it is sufficient to achieve the purpose of formulation, but is preferably 4 to 25% by mass, more preferably 5 to 18% by mass, particularly preferably 6 to 15% by mass, and most preferably 9 to 12% by mass, relative to the total mass of the liquid fabric softener composition. When the amount of component (A) is 4% by mass or more, it provides sufficient fragrance retention while exhibiting its function as a fabric softener. When the amount of component (A) is 25% by mass or less, the storage stability of the liquid fabric softener composition is better.

[0019] [(B) Component] Component (B) incorporated into the liquid fabric softener composition of the present invention is a nonionic polymer having a urethane skeleton. In the liquid fabric softener composition of the present invention, component (B) is incorporated to moderately suppress the fragrance intensity at the bottle opening. Preferably, component (B) is 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 (B) may 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 (B) can be a rheology modifier. One mechanism by which component (B) functions as a rheological modifier is the formation of aggregates. For example, hydrophobic groups in component (B) may associate with vesicle particles formed by component (A) (a structure formed by linking vesicle particles via component (B) is called a bridging structure), and / or hydrophobic groups in component (B) may associate with each other. (B) The hydrophobic groups that component may have are not particularly limited, but include, for example, linear or branched or cyclic hydrocarbon groups such as alkyl groups and cycloalkyl groups, and optionally substituted aryl groups and arylalkyl groups. (B) The hydrophilic groups that component may have are not particularly limited, but examples include polyoxyalkylene and polyoxyalkene.

[0020] (B) Component may be a commercially available product or one manufactured by a known method. (B) Examples of commercially available products of component (B) include 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 Bic 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 (B) 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 (B) using a mixture of a monoamine (e.g., a primary monolong-chain amine) and a diamine that has 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 (B). Possible monoamines include aliphatic amines, arylaliphatic amines, and aromatic amines. Component (B) can also be produced from a polyol, diisocyanate, and an alcohol having a hydrophobic structure. The method for producing component (B) is not limited to these. The mass-average molecular weight of component (B) 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. (B) Component may be used alone or in combination of two types. The amount of component (B) is greater than 0.01% by mass, preferably 0.02% by mass or more, relative to the total mass of the liquid fabric softener composition. Furthermore, the amount of component (B) is, for example, greater than 0.01% by mass and 2% by mass or less, preferably 0.02 to 2% by mass, more preferably 0.05 to 1% by mass, and even more preferably 0.1 to 0.5% by mass, relative to the total mass of the liquid fabric softener composition.

[0021] [(C) component] Component (C) incorporated into the liquid fabric softener composition of the present invention is a fragrance composition containing at least one fragrance component having a vapor pressure of 0.001 mmHg or more at 25°C and having a carbonyl group and / or an ether group, and containing 10% by mass or more of said fragrance component. In the fragrance composition of component (C), there are no particular restrictions on the type of fragrance component to be incorporated, other than containing at least one fragrance component having a vapor pressure of 0.001 mmHg or more at 25°C and having a carbonyl group and / or an ether group, and containing 10% by mass or more of said fragrance component, and fragrance components commonly used in finishing compositions for textile products such as fabric softener compositions can be appropriately selected according to the purpose. Fragrance components with a vapor pressure of 0.001 mmHg or higher at 25°C are considered to have a certain degree of volatility and are likely to affect the aroma at the bottle opening. Preferably, the above fragrance component contained in 10% by mass or more in the fragrance composition of component (C) has a vapor pressure of 0.005 mmHg or higher at 25°C, and more preferably 0.01 mmHg or higher. Also preferably, the above fragrance component contained in 10% by mass or more in the fragrance composition of component (C) has a vapor pressure of 20 mmHg or less at 25°C, and more preferably 10 mmHg or less. The vapor pressure of fragrance components is estimated using known methods such as the Antoine method, the Modified Grain method, and the Mackay method. Specific estimated vapor pressure values ​​can be found, for example, on The Good Scents Company Information System (http: / / www.thegoodscentscompany.com / index.html).

[0022] Fragrance components containing carbonyl and / or ether groups are generally poorly soluble in water and tend to remain on clothing without being washed away in rinse water. Examples of fragrance components having a vapor pressure of 0.001 mmHg or higher at 25°C and containing a carbonyl group and / or an ether group include, but are not limited to, the following. In this specification, the vapor pressure values ​​of fragrance components are quoted from The Good Scents Company Information System (http: / / www.thegoodscentscompany.com / index.html). <Carbonyl compounds> Bowlzional (0.009 mmHg), Hexyl cinnamaldehyde (0.001 mmHg), Lilial (0.005 mmHg), Iso-E Super (0.001 mmHg), Benzaldehyde (1.27 mmHg), Hexyl cinnamic aldehyde (0.001 mmHg), Aldehyde C-10 (0.207 mmHg), anisaldehyde (0.039 mmHg), β-ionone (0.017 mmHg), linalyl acetate (0.116 mmHg), benzyl acetate (0.177 mmHg), stearyl acetate (0.203 mmHg), methylbenzoate (0.38 mmHg), allyl hexanonate, cis-3-hexenyl acetate (mmHg), hexyl acetate (1.391 mmHg), Ethyl-2 methylbutyrate (7.853 mmHg), manzanate (2.906 mmHg), prenyl acetate (3.987 mmHg), hexyl isobutyrate (0.41 mmHg), benzophenone (0.001 mmHg), benzyl propionate (0.065 mmHg), methylanthranyl (0.016 mmHg), neryl acetate (0.026 mmHg), Verdox (0.103 mmHg) <Ethers> 1,8-Cineole (1.9 mmHg), Ambroxane (0.009 mmHg), α-Damascone (0.008 mmHg), γ-Undecalactone (0.003 mmHg), γ-Nonalactone (0.009 mmHg)

[0023] The fragrance composition, which is component (C) in the liquid fabric softener composition of the present invention, preferably contains 20% to 80% by mass, more preferably 30% to 60% by mass, of a fragrance component having a vapor pressure of 0.001 mmHg or more at 25°C and having a carbonyl group and / or an ether group. The fragrance composition, which is component (C) in the liquid softener composition of the present invention, preferably contains 10% by mass or more, more preferably 20% to 80% by mass, and even more preferably 30% to 60% by mass, of a fragrance component having a vapor pressure of 0.005 mmHg or more at 25°C and having a carbonyl group and / or an ether group. The amount of component (C) is 0.1% to 5% by mass, preferably 0.3% to 4% by mass, and more preferably 0.5% to 3% by mass, based on the total mass of the liquid softener composition. The amount of fragrance components having a vapor pressure of 0.001 mmHg or more at 25°C and containing carbonyl and / or ether groups is preferably 0.01% to 5% by mass, more preferably 0.03% to 4% by mass, and even more preferably 0.05% to 3% by mass, relative to the total mass of the liquid fabric softener composition. The amount of fragrance components having a vapor pressure of 0.005 mmHg or more at 25°C and containing carbonyl and / or ether groups is preferably 0.01% to 5% by mass, more preferably 0.03% to 4% by mass, and even more preferably 0.05% to 3% by mass, relative to the total mass of the liquid fabric softener composition.

[0024] One mechanism by which the fragrance release at the bottle opening of the liquid fabric softener composition of the present invention is moderately suppressed is the suppression of volatilization of component (C) through hydrophobic interactions and hydrogen bonding between component (B) and component (C). For example, it is thought that the volatilization of component (C) can be suppressed by hydrophobic interactions and hydrogen bonding between the hydrophobic portion and / or hydrophobic groups in component (B) and the carbonyl group and / or ether moiety in component (C), which are functional groups containing hydrophobic and oxygen atoms. Component (C) forms aggregates with component (A) in the liquid fabric softener composition. However, some of the component (C) that detaches from the aggregates can bind with component (B) in the liquid, which can suppress its diffusion into the air. On the other hand, most of component (C) exists as aggregates with component (A), and in the rinsing stage of washing, it is efficiently adsorbed to the fibers of clothing, resulting in good residual fragrance. In the liquid softener composition of the present invention, the mass ratio C / B of component (C) to component (B) is not particularly limited, but is preferably 0.05 to 100, more preferably 0.05 to 50, and even more preferably 0.1 to 30. When C / B is in the range of 0.05 to 100, the effect of suppressing the fragrance intensity at the bottle opening is better.

[0025] [Optional ingredients] The liquid fabric softener composition of the present invention may, as necessary, contain components other than those listed above (A) to (C), to the extent that it does not impair the effects of the present invention. For example, it may contain nonionic surfactants, microcapsules, water, amphoteric surfactants, water-soluble solvents, sugar compounds, silicone compounds, dyes and / or pigments, preservatives, UV absorbers, antibacterial agents, etc.

[0026] <Nonionic surfactant> The liquid fabric softener composition of the present invention may further contain a nonionic surfactant from the viewpoint of freeze-recovery properties and other factors. Nonionic surfactants can be preferably used, primarily to improve the emulsification and dispersion stability of oil-soluble components in the emulsion, when the fabric softener composition of the present invention is an emulsion. In particular, incorporating nonionic surfactants makes it easier to ensure a sufficient level of freeze-recovery stability for commercial purposes. Nonionic surfactants can be derived from polyhydric alcohols, higher alcohols, higher amines, or higher fatty acids, for example. More specifically, examples include glycerin fatty acid esters or pentaerythritol in which a C10-C22 fatty acid is esterified to glycerin or pentaerythritol, polyoxyethylene alkyl ethers having an alkyl or alkenyl group with C10-C22 and an average number of moles of ethylene oxide added of 10-100 moles, polyoxyethylene fatty acid alkyl (C1-C3 alkyl) esters; polyoxyethylene alkylamines with an average number of moles of ethylene oxide added of 10-100 moles, alkyl polyglucosides having an alkyl or alkenyl group with C8-C18, and hydrogenated castor oil with an average number of moles of ethylene oxide added of 10-100 moles. Among these, polyoxyethylene alkyl ethers having an alkyl group with C10-C18 and an average number of moles of ethylene oxide added of 20-80 moles are preferred. Nonionic surfactants may be used alone or in combination of two or more as appropriate. Any nonionic surfactant used in the field of fabric softener compositions can be used, and commercially available products can be appropriately selected. The amount of nonionic surfactant is not particularly limited and can be determined according to the desired function, preferably 0.1 to 4% by mass, more preferably 0.2 to 3% by mass, based on the total mass of the liquid fabric softener composition. When the nonionic surfactant content is 0.1% by mass or more, freeze-recovery properties are good. When the nonionic surfactant content is 4.0% by mass or less, the dispersion stability of the microcapsules is further improved.

[0027] <Microcapsules> The liquid softener composition of the present invention may further contain microcapsules. Microcapsules consist of a core material and a wall material that covers the core material. Microcapsules are used to impart various functions, and the core material may 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, etc. The components of such a core material can be components that are well known in the art of the present invention. Microcapsules may be used individually or in combination of two or more types as appropriate. Microcapsules can be selected from commercially available products depending on the purpose, but specific examples include the following:

[0028] Specific examples of microcapsules containing fragrance as a core substance, i.e., encapsulated fragrances, include Firmenich's BLUEFLOWERPOP "FFMHN2814," Givaudan's GREEN BREEZE CAPS, ORCHARD GARDEN CAPS, RAINBOW CAPS, VELVET CAPS, AURORACAPS, and COSMICCAPS; IFF's UNICAP101 and UNICAP503. Specific examples of microcapsules containing a cooling agent as a core material, i.e., cooling capsules, include MultiSal SalCool, HydroSal FreshCool, and SalSphere SalCool from SALVONA Technologies, NeoAge AROMA-C from Nikka Chemical Co., Ltd., and Multisal Fresh Cool from Wilbur Ellis. Specific examples of microcapsules containing a heat-sensing agent as a core material, i.e., heat-sensing capsules, include Riken Resin RMC-TO manufactured by Miki Riken Co., Ltd., and Hydrosal Heat manufactured by Salvona Technologies. Specific examples of functional capsules 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.

[0029] The wall material of a microcapsule is composed of a polymer, and materials commonly used in capsules contained in fabric softeners and laundry detergents can be used. Examples of wall materials 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 combination as appropriate. From the viewpoint of fragrance release when the capsule is broken, the wall material is preferably an aminoplast polymer made of melamine-formaldehyde resin or urea-formaldehyde resin, or a polyacrylic acid or polymethacrylic acid polymer. In particular, an aminoplast polymer as described in Japanese Patent Publication No. 2010-520928 is preferred. Specifically, it is preferably a terpolymer consisting of a polyamine-derived portion / aromatic polyphenol-derived portion / methylene units, dimethoxymethylene and dimethoxymethylene, and alkylene and alkylene oxy portions. The microcapsules preferably have an average particle diameter of 1 to 50 μm, more preferably 5 to 40 μm, and even more preferably 5 to 20 μm. The amount of microcapsules included is not particularly limited, but is preferably 0.01 to 5% by mass, more preferably 0.01 to 4% by mass, and even more preferably 0.05 to 3% by mass, relative to the total mass of the liquid softener composition. In this specification, the amount of microcapsules is the amount (mass%) of the component included as a core material relative to the total mass of the liquid fabric softener composition.

[0030] <Water> The liquid softener composition of the present invention is preferably an aqueous composition containing water. Any type of water can be used, including tap water, deionized water, purified water, and distilled water. Of these, deionized water is preferred. The amount of water added 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 amount of water added is 50% by mass or more, the handling properties are improved.

[0031] <Amphoteric surfactants> Amphoteric surfactants may be incorporated to further improve stability, particularly freeze-recoverability. Examples of amphoteric surfactants include betaine, N-alkyl amino acids, N-alkenyl amino acids, and their salts. Examples of betaines include alkylbetaine, carbobetine, amidebetaine, sulfobetaine, amidesulfobetaine, imidazolinium betaine, and phosphobetaine. N-alkyl amino acids or N-alkenyl amino acids have a structure in which an alkyl group or alkenyl group is bonded to a nitrogen atom, and one or two groups represented by "-R-COOH" (wherein R represents a divalent hydrocarbon group, preferably an alkylene group, and particularly preferably having 1 to 2 carbon atoms) are further bonded to it. In compounds with one "-R-COOH" bonded, a hydrogen atom is further bonded to the nitrogen atom. Compounds with one "-R-COOH" are called mono-forms, and those with two are called di-forms. Both mono-forms and di-forms can be used as amphoteric surfactants. In N-alkyl amino acids and N-alkenyl amino acids, the alkyl group and alkenyl group may be linear or branched. The optional component, an amphoteric surfactant, is preferably sulfobetaine or amidosulfobetaine, and more preferably a sulfobetaine represented by the following general formula (IV) or a mixture thereof. [ka] (In the formula, R 1' This is a linear or branched alkyl or alkenyl group having 9 to 23 carbon atoms. W is an ester group or an amide group. r is an integer from 1 to 4, R 2' This is an alkyl group or hydroxyalkyl group having 1 to 3 carbon atoms. R 3' ha-(CH2) s-T or -CH2CH(OH)CH2-T (where s is 0 to 4 and T is -COO) - , -SO3 - , -OSO3 - or -O - (is) and R 4' is R 1' -S-(CH2) r -, R 2' or R 3' (That is.)

[0032] In general formula (IV), R 1' The number of carbon atoms is preferably 11 to 17. 1' These are fatty acid residues, and specific examples include lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, palmitoleic acid, elaidic acid, linoleic acid, and eicoic acid. W is preferably an ester group. R 2' Specific examples include methyl groups, ethyl groups, hydroxyethyl groups, and hydroxypropyl groups. R 3' In this case, s is preferably 2 to 3.

[0033] Specific examples of sulfobetaines represented by general formula (IV) include those represented by general formulas (V) to (VII) below. Among these, compounds represented by (V) and (VI) are more preferred. [ka] (In each formula, R 1' The definition is R in general formula (IV). 1' (It is the same as)

[0034] In general formula (VI), R 1' They may be the same or they may be different. R 1' The iodine value of the fatty acid composition that forms the basis of this is preferably 0 to 100, more preferably 0 to 70, and even more preferably 20 to 45. The amphoteric surfactant is readily available on the market or can be synthesized by known methods. The amphoteric surfactant may be used alone or as a mixture of two or more types. For example, a mixture of multiple types of sulfobetaine represented by general formula (IV) or a mixture of any combination of sulfobetaine represented by general formulas (V) to (VII) can be used. In a mixture consisting of multiple types of sulfobetaine represented by general formula (IV), if the proportion of the cis isomer is 25-95%, preferably 40-90%, of the geometric isomers based on the alkenyl groups constituting each sulfobetaine, the viscosity of the liquid softener composition can be made appropriate. The amount of amphoteric surfactant is not particularly limited, but is preferably 0.01 to 3% by mass, more preferably 0.05 to 2% by mass, and even more preferably 0.1 to 1% by mass, relative to the total mass of the liquid softener composition. A concentration of 0.01% by mass or more can be obtained to obtain better freeze-recovery properties, and a concentration of 3% by mass or less can be obtained to obtain better storage stability at high temperatures.

[0035] <Water-soluble solvent> Water-soluble solvents may be added to further improve the stability of the liquid fabric softener composition, particularly 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, 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 6 -O-(C2H4O) y -(C3H6O) Z -H ···(X) (In the formula, R 6(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. The amount of water-soluble solvent is not particularly limited, but is preferably 0 to 30% by mass, more preferably 0.01 to 25% by mass, and even more preferably 0.1 to 20% by mass, relative to the total mass of the liquid softener composition.

[0036] <Sugar compounds> Sugar compounds may be added to further improve the stability of liquid fabric softener compositions, particularly their freeze-recoverability. As for sugar compounds, those with a number of repeating units in the sugar skeleton (degree of polymerization) of 1 to 40 are preferred, more preferably 1 to 20, and particularly preferred 1 to 5 (i.e., monosaccharides and oligosaccharides with a degree of polymerization greater than 1 and less than or equal to 5). Preferred sugar compounds include monosaccharides, disaccharides, oligosaccharides, and sugar alcohols. Specific examples of sugars include glucose, fructose, galactose, arabinose, ribose, maltose, isomaltose, cellobiose, lactose, sucrose, trehalose, talose, maltotriose, isomalttriose, and oligosaccharides obtained from the partial hydrolysis of natural polysaccharides, as well as compounds (sugar derivatives) in which substituents are introduced into these sugars. Possible substituents include alkyl groups, alkenyl groups, alkoxy groups, hydroxyalkyl groups, amine groups, quaternary ammonium groups, and carboxyl groups, among which alkyl groups, alkenyl groups, and alkoxy groups are particularly preferred. Preferably, substituents are alkyl groups, alkenyl groups, or alkoxy groups having 1 to 18 carbon atoms; more preferably alkyl groups, alkenyl groups, or alkoxy groups having 1 to 12 carbon atoms; even more preferably alkyl groups having 1 to 6 carbon atoms; and most preferably alkyl groups having 1 to 3 carbon atoms. As for the sugar, one or more selected from monosaccharides and oligosaccharides with a degree of polymerization of 1 to 5, and compounds in which at least one hydrogen atom of a hydroxyl group of monosaccharides and oligosaccharides with a degree of polymerization of 1 to 5 is substituted with an alkyl group, are preferred. Among those listed above, trehalose is preferred from the viewpoint of freeze-recoverability. Examples of sugar alcohols include erythritol, treitol, pentitol, hexitol, dalucitol, sorbitol, mannitol, boremitol, perseylitol, xylitol, maltitol, and lactitol. The sugar compounds may be used individually or as a mixture of two or more types. The amount of sugar compounds included is not particularly limited, but is preferably 0.01 to 10% by mass, more preferably 0.05 to 7% by mass, and even more preferably 0.1 to 5% by mass, relative to the total mass of the liquid softener composition.

[0037] <Silicone compounds> Silicone compounds may be incorporated primarily to improve the flexibility (texture) of textile products. 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, branched, or crosslinked. Furthermore, the silicone compound may be a modified silicone compound. The modified silicone compound may be modified with one or more organic functional groups. Silicone compounds can be used in oil form, or in emulsion form dispersed with any emulsifier. Specific examples of silicone compounds include, for instance, 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. Among these, from the viewpoints of versatility and improvement of the texture imparting effect, polyether-modified silicone, amino-modified silicone, and dimethyl silicone are preferable. From the viewpoints of further improvement effect of the texture and handling during production, polyether-modified silicone and amino-modified silicone are preferable.

[0038] Regarding dimethyl silicone, its kinematic viscosity is not particularly limited, but 1 to 100,000,000 mm 2 / s is preferable, 10 to 10,000,{000} mm 2 / s is more preferable, and 100 to 1,000,{000} mm 2 / s is even more preferable. Also, dimethyl silicone may be an oil or an emulsion.

[0039] Specific examples of polyether-modified silicone include, for example, copolymers of alkyl siloxane and polyoxyalkylene. The number of carbon atoms of the alkyl group of alkyl siloxane is preferably 1 to 3. The number of carbon atoms of the alkylene group of polyoxyalkylene is preferably 2 to 5. Preferable polyether-modified silicone includes copolymers of dimethyl siloxane and polyoxyalkylene (such as polyoxyethylene, polyoxypropylene, and random or block copolymers of ethylene oxide and propylene oxide). Specific examples include, for example, compounds represented by the following general formula (I).

Chemical formula

[0040] A preferred polyether-modified silicone is a linear polysiloxane-polyoxyalkylene block copolymer represented by the following general formula (II). [ka] (In the formula, 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.

[0041] More specifically, 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.

[0042] 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 in the form of an oil, or it may be in the form of an amino-modified silicone emulsion emulsified using a nonionic surfactant or a cationic surfactant as an emulsifier. A preferred base oil in an amino-modified silicone oil or emulsion is a compound represented by the following general formula (III). [ka] (wherein, R 1 and R 6 may be the same as or different from each other, and are a methyl group, a hydroxyl group or hydrogen, 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 may be the same as or different from each other, and are a hydrogen atom, an alkyl group having 1 to 12 carbon atoms, a phenyl group or -(CH2) n -NH2 (where n is 0 to 12), and X - is a fluorine ion, a chlorine ion, a bromine ion, an iodine ion, a methyl sulfate ion or an ethyl sulfate ion), and the values of m and n may be the same as or different from each other, and are integers of 0 to 12), p and q each represent the degree of polymerization of the polysiloxane, and may be the same as or different from each other. p is 0 to 20000, preferably 10 to 10000, and q is 1 to 500, preferably 1 to 100.)

[0043] The oil of the amino-modified silicone preferably has a kinematic viscosity at 25 °C of 50 to 20000 mm 2 / s, and more preferably 100 to 10000 mm 2 / s. When the kinematic viscosity is within this range, a high texture-imparting effect is exhibited, the productivity is good, and the handling of the product becomes easy.

[0044] Commercially available amino-modified silicones can be used. Examples of amino-modified silicone oils include those sold by Toray Dow Corning Ltd. as SF-8417, BY16-892, and BY16-890, and those sold by Shin-Etsu Chemical Co., Ltd. as KF-864, KF-860, KF-8004, KF-8002, KF-8005, KF-867, KF-861, KF-880, and KF-867S. Examples of amino-modified silicone emulsion types include those sold by Toray Dow Corning Co., Ltd. as SM8904, BY22-079, FZ-4671, and FZ-4672; those sold by Shin-Etsu Chemical Co., Ltd. as part of the Polon series, including PolonMF-14, PolonMF-29, PolonMF-14D, PolonMF-44, PolonMF-14EC, and PolonMF-52; and those sold by Asahi Kasei Wacker Silicone Co., Ltd. as WACKER FC201.

[0045] Silicone compounds may be used individually or as a mixture of two or more types. The amount of silicone compound is not particularly limited, but is 0.01 to 10% by mass, preferably 0.05 to 8% by mass, and more preferably 0.1 to 5% by mass, relative to the total mass of the liquid softener composition.

[0046] <Dyes and / or pigments> Dyes and pigments may be added to improve the appearance of the liquid fabric softener composition. Both dyes and pigments can be used without particular restriction, as long as they are components known in the field of liquid softener compositions. Specific examples of dyes that can be added are listed in the Dye Handbook (edited by the Society of Synthetic Organic Chemistry, published July 20, 1970, Maruzen Co., Ltd.), etc. In addition, dyes described in Japanese Patent Publication Nos. Hei 6-123081, Hei 6-123082, Hei 7-18573, Hei 8-27669, Hei 9-250085, Hei 10-77576, Hei 11-43865, Hei 2001-181972, and Hei 2001-348784 can also be used. Preferably, it is one or more water-soluble dyes in the red, blue, yellow, or purple range, selected from acid dyes, direct dyes, basic dyes, reactive dyes, and mordants / acid mordants. From the viewpoint of storage stability and dyeability to fibers of the liquid fabric softener composition, acid dyes, direct dyes, or reactive dyes having at least one functional group selected from hydroxyl groups, sulfonic acid groups, amino groups, and amide groups in the molecule are preferred. Dyes and pigments may be used individually or as a mixture of two or more types. Dyes and pigments may also be used in combination. The amounts of dyes and pigments are not particularly limited, but are preferably 1 to 50 ppm, more preferably 1 to 30 ppm, relative to the total mass of the liquid softener composition.

[0047] <Preservatives> Preservatives may be added primarily 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 softener compositions can be used without particular limitation. 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 amount of preservative to be added is not particularly limited, but is preferably 0.0001 to 1% by mass relative to the total mass of the liquid fabric softener composition. If the amount 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] <UV absorber> UV absorbers may be added to liquid fabric softener compositions to protect them from ultraviolet light. UV absorbers are ingredients that absorb ultraviolet rays and convert them into infrared rays, visible light, etc., before releasing them, thereby providing UV protection. As the ultraviolet absorber, any component known in the field of liquid softener compositions can be used without particular limitation. Specific examples include, for instance, aminobenzoic acid derivatives such as p-aminobenzoic acid, ethyl p-aminobenzoate, glyceryl p-aminobenzoate, and amyl p-dimethylaminobenzoate; salicylic acid derivatives such as ethylene glycol salicylate, dipropylene glycol salicylate, octyl salicylate, and myristyl salicylate; cinnamic acid derivatives such as methyl diisopropylcinnamate, ethyl p-methoxycinnamate, isopropyl p-methoxycinnamate, 2-ethylhexyl p-methoxycinnamate, and butyl p-methoxycinnamate; benzophenone derivatives such as 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid, and 2,2'-dihydroxy-4-methoxybenzophenone; azole compounds such as urocanic acid and ethyl urocanate; and 4-t-butyl-4'-methoxybenzoylmethane. The amount of UV absorber included is not particularly limited, but is preferably 0.001 to 5% by mass relative to the total mass of the liquid softener composition.

[0049] <Antibacterial agent> Antimicrobial agents may be added to improve the shelf life of liquid fabric softener compositions. As antibacterial agents, any known components in the field of liquid fabric softener compositions can be used without particular limitation. Specific examples include diclosan, triclosan, benzalkonium chloride, bis-(2-pyridylthio-1-oxide)zinc, 8-oxyquinoline, biguanide compounds (e.g., polyhexamethylene biguanide), chlorohexidine hydrochloride, and polylysine. Among these, benzalkonium chloride, biguanide compounds, and chlorohexidine hydrochloride are preferred. The amount of antibacterial agent is not particularly limited, but is preferably 0.001 to 5% by mass relative to the total mass of the liquid softener composition.

[0050] <(B) Rheological modifiers (thickeners) other than component> Other rheological modifiers (thickeners) besides component (B) may be added to adjust the viscosity of the liquid softener composition or to stabilize the dispersion of microcapsules, etc. Specific examples include gums such as gellan gum, carrageenan gum, and xanthan gum; acrylic acid polymers such as alkyl methacrylate / acrylic acid copolymer (CARBOPOL AQUA30) and cationic acrylic homopolymer (Rheovis FRC); fine cellulose; and highly branched cyclic dextrin (cluster dextrin).

[0051] In addition to the optional components mentioned above, other ingredients may be used to improve the stability of the fragrance and color of the liquid fabric softener composition, including antioxidants (e.g., butylated hydroxytoluene), reducing agents, emulsifiers (e.g., polystyrene emulsion), opacifiers, shrinkage inhibitors, wrinkle inhibitors (e.g., polyether-modified silicone), shape-retaining agents, drape-retaining agents, ironing-improving agents, oxygen bleach inhibitors, whitening agents, fabric softening clay, antistatic agents, color transfer inhibitors (e.g., polyvinylpyrrolidone), polymer dispersants, stain removers, scum dispersants, fluorescent whitening agents (e.g., 4,4-bis(2-sulfostyryl)biphenyldisodium (Chiba Specialty Chemicals Chinopearl CBS-X)), dye fixatives, and fade inhibitors (e.g., 1,4-bis(3-aminopropyl)piperazine). Ingredients such as stain removers, fiber surface modifiers (enzymes such as cellulase, amylase, protease, lipase, and keratinase), antifoaming agents, and ingredients that impart the texture and function of silk, such as moisture absorption and release properties (silk protein powder, their surface modifiers, 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)), and 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.) can be appropriately blended.

[0052] [pH of liquid fabric softener composition] The pH of the liquid fabric softener composition is not particularly limited, but from the viewpoint of improving the dispersibility of the encapsulated fragrance and suppressing the hydrolysis of component (A) due to storage over time, it is preferable to adjust the pH at 25°C to a range of 1 to 6, more preferably to a range of 2 to 4, and even more preferably to a range of 2 to 3. pH adjusters such as 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 to adjust the pH.

[0053] [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. Furthermore, inorganic or organic water-soluble salts can be used to control the viscosity of the liquid fabric softener composition of the present invention. Specifically, calcium chloride, magnesium chloride, sodium chloride, sodium p-toluenesulfonate, sodium citrate, etc., can be used, with calcium chloride, magnesium chloride, and sodium citrate being particularly preferred. These water-soluble salts can be added in an amount that does not impair the dispersibility of the encapsulated fragrance, and the amount added is, for example, 0 to 0.5% by mass, preferably 0 to 0.3% by mass, and more preferably 0 to 0.1% by mass, relative to the total mass of the liquid fabric softener composition. The water-soluble salts can be added at any stage of the manufacturing process of the liquid fabric softener composition. The viscosity mentioned above refers to the value measured at 25°C using a B-type viscometer (for example, Brookfield's analog viscometer T).

[0054] [Method for preparing a liquid fabric softener composition] The method for preparing the liquid fabric softener composition of the present invention is not particularly limited. It can be produced by known methods for preparing liquid fabric softener compositions, for example, by methods similar to those for preparing conventional fabric softener compositions using a cationic surfactant as the main component. For example, it can be produced by mixing an oil phase containing components (A) and (C) with an aqueous phase under conditions of a temperature above the melting point of component (A) to prepare an emulsion, and then adding component (B) and other components as needed to the resulting emulsion and mixing. The oil phase can be prepared by mixing component (A) with any optional component, such as a nonionic surfactant, at a temperature above the melting point of component (A). The aqueous phase can be prepared by mixing water with optional components such as preservatives, if necessary.

[0055] [How to use liquid fabric softener composition] There are no particular restrictions on how the liquid fabric softener composition of the present invention can be used, and it can be used in the same way as general fabric softener compositions. For example, one method is to dissolve the liquid fabric softener composition of the present invention in the rinse water during the rinsing stage of washing to soften the clothes to be washed, or to dissolve the liquid fabric softener composition of the present invention in water in a container such as a basin, and then immerse the clothes to be washed in it for a soaking treatment. [Examples]

[0056] 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).

[0057] [(A) component] The following A-1 to A-3 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). 9The 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. A-3: Cationic surfactant (a 1:1 molar mixture of N,N-bis(stearoyl-oxy-ethyl)N,N-dimethylammonium chloride and N-(stearoyl-oxy-ethyl)N-hydroxyethylN,N-dimethylammonium chloride, obtained by quaternizing the reaction product of a fatty acid and methyldiethanolamine in a molar ratio of 1.5:1 with methyl chloride). A-3 is a compound represented by the general formulas (A1-1) and (A1-2) (where R is in each formula). 9 The composition contains a quaternary merization of an alkyl group and alkenyl group having 15 to 17 carbon atoms with methyl chloride.

[0058] [(B) Component] The following B-1 to B-3 were used. B-1: Product name "RHEOBYK-H 7625 VF", manufactured by Bic Chemie Japan Co., Ltd. B-2: Product name "RHEOBYK-H 7500 VF", manufactured by Bic Chemie Japan Co., Ltd. B-3: Product name "RHEOBYK-H 6500 VF", manufactured by Big Chemie Japan Co., Ltd. In addition, B-4, a cationic acrylic homopolymer (thickener), was used as a comparative example. B-4 (comparative example): Product name "Rheovis FRC", manufactured by BASF.

[0059] [(C) component] The following C-1 to C-3 were used. C-1: Fragrance composition containing fragrance components with the composition shown in Table 1 below. It contains 53.6% by mass of fragrance components having a vapor pressure of 0.001 mmHg or higher at 25°C and having carbonyl and / or ether groups, and 40% by mass of fragrance components having a vapor pressure of 0.005 mmHg or higher at 25°C and having carbonyl and / or ether groups. [Table 1]

[0060] C-2: Fragrance composition containing fragrance components with the composition shown in Table 2 below. It contains 60.3% by mass of fragrance components having a vapor pressure of 0.001 mmHg or higher at 25°C and having carbonyl and / or ether groups, and 44.7% by mass of fragrance components having a vapor pressure of 0.005 mmHg or higher at 25°C and having carbonyl and / or ether groups. [Table 2]

[0061] C-3: Fragrance composition containing fragrance components with the composition shown in Table 3 below. It contains 39.8% by mass of fragrance components having a vapor pressure of 0.001 mmHg or higher at 25°C and having carbonyl and / or ether groups, and 18.3% by mass of fragrance components having a vapor pressure of 0.005 mmHg or higher at 25°C and having carbonyl and / or ether groups. [Table 3]

[0062] Additionally, C-4 was used as a comparative example. C-4 (Comparative Example): A fragrance composition containing fragrance components with the composition shown in Table 4 below. It does not contain fragrance components with a vapor pressure of 0.001 mmHg or higher at 25°C and containing carbonyl and / or ether groups. [Table 4]

[0063] [Optional ingredients] <Viscosity control agent> D-1: Calcium chloride (product name "Granular Calcium Chloride", manufactured by Tokuyama Corporation)

[0064] <Encapsulated fragrance> E-1: Product name "GREEN BREEZE CAPS", manufactured by Givaudan.

[0065] <Nonionic surfactant> F-1: Polyoxyethylene isotridecyl ether EO60 moles (made by adding ethylene oxide to BASF's rutenzol TO3 (EO60 moles indicates an average number of moles of ethylene oxide added of 60)).

[0066] <Preservatives> G-1: 1,2-Benzisothiazolin-3-one (product name "Nipacide BIT 20", manufactured by Clariant Japan Co., Ltd.) G-2: Isothiazolone solution (product name "Caison CG-ICP", manufactured by Dow Chemical Japan Ltd.)

[0067] [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 shown in Table 5 below, and the fabric softener composition was prepared according to the following procedure. In Table 5 below, the values ​​for each component represent the amount (mass%) added to the total mass of the liquid fabric softener composition. The value for component (E-1) (encapsulated fragrance) represents the amount (mass%) added as fragrance to the total mass of the liquid fabric softener composition. First, components (A) and (C), along with the nonionic surfactant, were mixed and stirred to obtain an oil phase mixture. Meanwhile, the 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 (B), preservative, encapsulated fragrance, and viscosity control agent 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 (B), encapsulated fragrance, and viscosity control agent were added to the resulting emulsion. If necessary, an appropriate amount of hydrochloric acid (reagent 1 mol / L, Kanto Chemical) or sodium hydroxide (reagent 1 mol / L, 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 1-11 and Comparative Examples 1-3).

[0068] [Method for evaluating liquid fabric softener compositions] <Evaluation of aroma intensity at the bottle opening> 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 then heated to 25°C. The fragrance intensity at the mouth of each sample was then sensorily evaluated according to the following five-point scale. The fragrance intensity was determined based on the average score (calculated to one decimal place) of five expert panelists, according to the following criteria. A score of 2.5 to 3.5 was marked with ○, a score of 2 to less than 2.5 or between 3.5 and 4 was marked with △, and a score of less than 2 or greater than 4 was marked with ×. The results are shown in the "Fragrance Intensity at the Mouth of the Bottle" column in Table 5 below. From a commercial value perspective, ○ and △ were considered acceptable. (Evaluation Criteria) 1: The scent is too weak. 2: The scent is a little weak. 3: Just the right scent 4: Slightly strong scent 5: The scent is too strong

[0069] <Evaluation of residual fragrance after washing and spinning> 1. Treatment of cotton towels using a liquid fabric softener composition (Pre-treatment of evaluation fabric) Commercially available cotton towels (manufactured by Toshinsha) were subjected to the following pretreatment three times using a twin-tub washing machine (Toshiba VH-30S) with the commercially available detergent "Top Platinum Clear" (manufactured by Lion Corporation). Pretreatment: The following cycle was performed twice: washing with standard detergent amount, a bath ratio of 30, and 45°C tap water for 10 minutes, followed by a 10-minute rinse. (Treatment with liquid softener composition) 700g of pre-treated cotton towels (manufactured by Toshin Co., Ltd.) were washed in a fully automatic washing machine (TOSHIBA AW-8V2) using 25°C tap water on a standard course (2 rinses), with a bath-to-water ratio of 30 times and the standard amount of commercially available detergent "Top NANOX" (manufactured by Lion Corporation). Each liquid fabric softener composition prepared according to the "Method for Preparing Liquid Fabric Softener Compositions" described above was added at the start of the second rinse. After washing, the cotton towels were removed and the residual fragrance of the treated fabrics was evaluated as follows.

[0070] 2. Evaluation of residual fragrance of treated fabrics After storing the cotton towels obtained as described above overnight, the fragrance intensity of the cotton towels was sensorily evaluated according to the following 5-point scale. The residual fragrance was judged based on the average score of 5 expert panelists according to the following criteria. An average score of 4 points or higher was marked with ○, a score of 3 points or higher but less than 4 points was marked with △, and a score of less than 3 points was marked with ×. In terms of commercial value, ○ and △ were considered acceptable. (Evaluation Criteria) 1: I can barely smell it. 2: I can faintly smell the fragrance. 3: Slightly noticeable scent 4: I strongly perceive the scent. 5: The scent is quite strong.

[0071] [Table 5]

Claims

1. The following components (A) to (C): (A) Cationic surfactants; (B) Nonionic polymers having a urethane skeleton; and (C) A fragrance composition comprising at least one fragrance component having a vapor pressure of 0.005 mmHg or more at 25°C and having a carbonyl group and / or an ether group, wherein the fragrance component is present in an amount of 40% by mass or more and 60% by mass or less. A liquid fabric softener composition containing (B) with a content of more than 0.01% by mass and 2% by mass or less, and a content of (C) with a content of 0.1% by mass to 5% by mass.

2. The liquid softener composition according to claim 1, wherein the content of component (B) is 0.1% by mass to 0.5% by mass.

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