Liquid detergent composition

Abstract

To provide a liquid detergent composition which can stably exhibit a color fade suppression effect without blending a solid constituent thereto.SOLUTION: There is provided a liquid detergent composition including: 15-55 mass% of a component (A) formed of a component (A1) being a nonionic surface active agent and a component (A2) being a non-soap type anionic surface active agent; 0.01-3 mass% of a component (B) which is at least one kind of: a component (B1) which is aliphatic monovalent alcohol having C18-26; a component (B2) being monoglyceride or diglyceride which is ester formed of one or two or more kinds of linear fatty acid having C12-26 and glycerin; and a component (B3) being fatty acid ester formed of fatty acid and aliphatic monovalent alcohol and having C20-38, and having a linear alkyl chain having C12-26, and a mass ratio (A1 / A2) is 1.5-8.SELECTED DRAWING: None

Description

[Technical Field]

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

[0002] Generally, dark-colored clothing such as black or navy blue tends to fade with repeated washing and wear. Conventionally, various measures have been taken in liquid detergent compositions to prevent discoloration. For example, Patent Document 1 proposes a composite in which ammonium salts are supported on clay minerals as an additive to capture hypochlorite ions in tap water, which are a cause of discoloration. Furthermore, Patent Document 2 proposes incorporating solid-state microquanta with a specific refractive index. Furthermore, Patent Document 3 describes a method that uses cellulase to prevent pilling and thus reduce the appearance of fading. [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 10-88188 [Patent Document 2] Japanese Patent Publication No. 2005-126828 [Patent Document 3] Japanese Patent Publication No. 2011-184685 [Overview of the project] [Problems that the invention aims to solve]

[0004] However, the liquid detergent compositions disclosed in Patent Documents 1 and 2 use solid components, which leads to the problem of clothes becoming stiff after washing. Furthermore, methods using enzymes, such as those in Patent Document 3, make it difficult to sustain the enzymatic effect of the liquid detergent composition. In view of the above circumstances, the object of the present invention is to provide a liquid detergent composition that can stably achieve a color fading suppression effect without incorporating solid components. [Means for solving the problem]

[0005] To achieve the above objectives, the present invention employs the following configuration. [1] Component (A) consisting of component (A1) and component (A2), A liquid detergent composition containing at least one (B) component selected from (B1), (B2), and (B3), The aforementioned component (A1) is a nonionic surfactant, The aforementioned component (A2) is a non-soap-based anionic surfactant. The aforementioned component (B1) is an aliphatic monohydric alcohol having 18 to 26 carbon atoms. The aforementioned component (B2) is a monoglyceride or diglyceride, which is an ester consisting of one or two straight-chain fatty acids having 12 to 26 carbon atoms and glycerol. The aforementioned (B3) component is a fatty acid ester having 20 to 38 carbon atoms, comprising a fatty acid and an aliphatic monohydric alcohol, and is a fatty acid ester comprising a fatty acid having a carboxyl group at the end of a linear alkyl chain having 12 to 26 carbon atoms and a monohydric alcohol, or a fatty acid ester comprising a monohydric alcohol having a hydroxyl group at the end of a linear alkyl chain having 12 to 26 carbon atoms and a fatty acid. The content of component (A) is 15 to 55% by mass relative to the total mass of the liquid detergent composition. The content of component (B) is 0.01 to 3% by mass relative to the total mass of the liquid detergent composition. A liquid detergent composition in which the ratio of the mass of component (A1) to the mass of component (A2) [(A1) / (A2)] is 1.5 to 8. [2] The above component (A2) contains a linear alkylbenzene sulfonic acid or a salt thereof, The liquid detergent composition according to [1], wherein the content of the linear alkylbenzene sulfonic acid or a salt thereof is 3% by mass or more with respect to the total mass of the liquid detergent composition. [3] Furthermore, it contains component (C), The liquid detergent composition according to [1] or [2], wherein the (C) component is a water-soluble polymer having at least one unit selected from the group consisting of alkylene terephthalate units and alkylene isophthalate units, and at least one unit selected from the group consisting of oxyalkylene units and polyoxyalkylene units. [Effects of the Invention]

[0006] According to the liquid detergent composition of the present invention, a stable color fading suppression effect can be obtained without incorporating solid components. [Modes for carrying out the invention]

[0007] The liquid detergent composition of the present invention is a liquid detergent composition containing components (A) and (B) described later, and water. The liquid detergent composition of the present invention preferably further contains component (C) described later. It is also preferable that it contains component (D) described later. The following descriptions of constituent elements may be based on representative embodiments or specific examples, but the present invention is not limited to such embodiments. In this specification, numerical ranges indicated using "~" refer to the range that includes the values ​​before and after "~" as the lower and upper limits, respectively. Furthermore, the content of components that can exist in both acidic and saltic forms refers to the content in acidic form.

[0008] <(A) component> Component (A) consists of the following components (A1) and (A2). The inclusion of component (A) provides low-temperature stability for component (B). (A1) Ingredients: Nonionic surfactant. (A2) Ingredients: Non-soap-based anionic surfactant.

[0009] The content of component (A), that is, the total content of component (A1) and component (A2), is 15 to 55% by mass, preferably 17 to 53% by mass, more preferably 20 to 51% by mass, and even more preferably 38 to 49% by mass, based on the total mass of the liquid detergent composition.

[0010] (A) When the content of component (A) is above the lower limit, stability at low temperatures and good cleaning power are obtained. (A) When the content of component (A) is below the upper limit, uniform stability of appearance is obtained, viscosity does not become too high, and good rinsability is obtained.

[0011] [(A1) component] Component (A1) is a nonionic surfactant. Component (A1) may be used alone or in combination of two or more types. By incorporating component (A1), the low-temperature stability of component (B) is achieved. Furthermore, an effect of suppressing re-soiling of clothing is also obtained. Additionally, cleaning power is enhanced.

[0012] The content of component (A1) is preferably 9 to 48% by mass, more preferably 10 to 40% by mass, even more preferably 13 to 35% by mass, and particularly preferably 25 to 35% by mass. (A1) When the content of component (A1) is above the lower limit, stability at low temperatures is further enhanced. It is also preferable in terms of suppressing re-soiling and cleaning power. When the content of component (A1) is below the upper limit, uniform stability of appearance is obtained, viscosity does not become too high, and good rinsability is obtained.

[0013] Examples of component (A1) include polyoxyalkylene-type nonionic surfactants, alkylphenols, alkylene oxide adducts of fatty acids having 8 to 22 carbon atoms or amines having 8 to 22 carbon atoms, polyoxyethylene polyoxypropylene block copolymers, fatty acid alkanolamides, polyhydric alcohol fatty acid esters or their alkylene oxide adducts (excluding component (B2) described below), alkylene oxide adducts of hydrogenated castor oil, sugar fatty acid esters, N-alkyl polyhydroxy fatty acid amides, and alkyl glycosides.

[0014] In particular, it is preferable to include a polyoxyalkylene-type nonionic surfactant, an alkylene oxide adduct such as a fatty acid having 8 to 22 carbon atoms, or an amine having 8 to 22 carbon atoms. It is especially preferable to include a polyoxyalkylene-type nonionic surfactant in terms of cleaning power and suppression of re-soiling. Component (A1) is particularly preferably a polyoxyalkylene-type nonionic surfactant.

[0015] Examples of polyoxyalkylene-type nonionic surfactants include the compound represented by the following general formula (a1) (hereinafter also referred to as "compound (a1)"), the compound represented by the following general formula (a2) (hereinafter also referred to as "compound (a2)"), and the compound represented by the following general formula (a3) ​​(hereinafter also referred to as "compound (a3)").

[0016] [Compound (a1)] Compound (a1) is a polyoxyalkylene-type nonionic surfactant having a straight-chain hydrocarbon group. R 11 -O-[(EO) s / ( A 11 O) t ]-(EO) u -R 12 ...(a1) (In general formula (a1), R 11 R is a straight-chain hydrocarbon group with 8 to 22 carbon atoms. 12 is a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or an alkenyl group having 2 to 6 carbon atoms. EO is an oxyethylene group. s is a number between 3 and 25 indicating the average repeating number of EO. A11 O represents at least one of PO (oxypropylene group) and BO (oxybutylene group). t is A 11 It is a number from 0 to 6 indicating the average number of repetitions of A

[0017] In general formula (a1), R 11 The hydrocarbon group has 8 to 22 carbon atoms, preferably 10 to 18 carbon atoms, and more preferably 12 to 18 carbon atoms. R 11 The hydrocarbon group is linear. Also, R 11 The hydrocarbon group may or may not have an unsaturated bond. The carbon atom of R 11 bonded to -O- may be a primary carbon atom or a secondary carbon atom.

[0018] R 12 When it is an alkyl group, it has 1 to 6 carbon atoms, and preferably 1 to 3 carbon atoms. R 12 When it is an alkenyl group, it has 2 to 6 carbon atoms, and preferably 2 to 3 carbon atoms. R 12 A hydrogen atom is particularly preferred.

[0019] s is from 3 to 25, and in terms of excellent detergency, 5 to 25 is preferred, 7 to 20 is more preferred, 7 to 18 is even more preferred, and 7 to 15 is particularly preferred. t is from 0 to 6, and preferably 0 to 3. u is from 0 to 20, and preferably 0 to 15, and more preferably 0 to 10.

[0020] When t is not 0, that is, when the compound (a1) has EO and PO, EO and BO, or EO and PO and BO, in [(EO)s / (A 11 O)t], there is no particular limitation on the distribution (sequence order) of EO and PO, EO and BO, or EO and PO and BO, and these may be arranged in a block form or in a random form. Also, EO may be bonded to "R 11 -O-", or PO or BO may be bonded to "R[[ID=!]] 11 -O-". If t is not 0, compound (a1) preferably has EO and PO, or EO and BO.

[0021] [Compound (a2)] Compound (a2) is a polyoxyalkylene-type nonionic surfactant having branched hydrocarbon groups. R 13 -O-[(EO) v / ( A 12 O) w ]-(EO) x -R 14 ...(a2) (In general formula (a2), R 13 R is a branched hydrocarbon group with 8 to 22 carbon atoms. 14 is a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or an alkenyl group having 2 to 6 carbon atoms. EO is an oxyethylene group. v is a number between 3 and 25 indicating the average repeating number of EO. A 12 O represents at least one of PO (oxypropylene group) and BO (oxybutylene group). w is A 12 x is a number between 0 and 6 representing the average number of repetitions of O. x is a number between 0 and 20 representing the average number of repetitions of EO.

[0022] In general formula (a2), R 13 The number of carbon atoms in the hydrocarbon group is 8 to 22, preferably 10 to 18, and more preferably 12 to 18. 13 The hydrocarbon group is a branched chain. Also, R 13 The hydrocarbon group may or may not have an unsaturated bond. -O- binding R 13 The carbon atoms can be either primary or secondary carbon atoms.

[0023] R 14 If it is an alkyl group, the number of carbon atoms is 1 to 6, and preferably 1 to 3. R 14 If the group is an alkenyl group, the number of carbon atoms is 2 to 6, and preferably 2 to 3. R 14 A hydrogen atom is particularly preferred.

[0024] v is between 3 and 25, with 5 to 18 being preferred, 7 to 15 being more preferred, and 7 to 12 being even more preferred, in terms of excellent cleaning power. w is between 0 and 6, and preferably between 0 and 3. x is between 0 and 20, preferably between 0 and 15, and more preferably between 0 and 10.

[0025] If w is not 0, that is, if compound (a2) has EO and PO, EO and BO, or EO, ​​PO and BO, then [(EO) v / ( A 12 O) w In [ ], there are no particular restrictions on the distribution (arrangement order) of EO and PO, EO and BO, or EO, ​​PO and BO; they may be arranged in blocks or randomly. Also, if EO is "R 13 -O-" may be added, or PO or BO may be added to "R 13 It may be combined with "-O-". If w is not 0, compound (a2) preferably has EO and PO, or EO and BO.

[0026] Examples of commercially available compounds (a2) include, for example, alcohols such as Diadol (registered trademark) (C13, the number after C indicates the number of carbon atoms in the alcohol; the same applies hereinafter) manufactured by Mitsubishi Chemical Corporation, Neodol (registered trademark) (a mixture of C12 and C13) manufactured by Shell Corporation, Safol (registered trademark) 23 (a mixture of C12 and C13) manufactured by Sasol Corporation, and EXXAL (registered trademark) 13 (C13), to which 3 to 10 moles of ethylene oxide have been added; A C13 alcohol obtained by trimerizing butene to a C12 alkene and subjecting it to the oxo process is to be added to an alcohol equivalent to 3, 5, or 7 moles of ethylene oxide (Lutensol® TO3, Lutensol TO5, Lutensol TO7, manufactured by BASF). A C13 alcohol obtained by trimerizing butene to a C12 alkene and subjecting it to the oxo process is then modified by adding 12 moles or 15 moles of ethylene oxide (e.g., Lutensol® TO12, Lutensol TO15, manufactured by BASF). A C10 alcohol obtained by subjecting pentanol to the Garbet reaction is then modified by adding 9 moles of ethylene oxide (Lutensol XP90, manufactured by BASF). A C10 alcohol obtained by subjecting pentanol to the Garbet reaction is then modified by adding 7 moles of ethylene oxide (Lutensol XL70, manufactured by BASF). Examples include Lutensol XA60 (manufactured by BASF), which is obtained by adding 6 moles of ethylene oxide to a C10 alcohol obtained by subjecting pentanol to the Garbet reaction.

[0027] Among these, products such as Sasol's trade name Safol23 (branching rate: 50% by mass) (an alcohol obtained from olefins obtained from coal gasification by the oxo process and then hydrogenated) and Shell Chemicals' trade name Neodol23 (branching rate: 20% by mass) (produced from n-olefins by the improved oxo process and then rectified) have R in the general formula (a2). 13 Compounds in which the hydrocarbon group is a branched chain, and in general formula (a1) R 11 In the case of a "mixture" of compounds in which the hydrocarbon group is straight-chain, the compound with a branched chain is defined as compound (a2), while the compound with a straight chain is defined as compound (a1). The "branching rate" refers to the proportion (by mass) of branched higher alcohols to the total higher alcohols.

[0028] [Compound (a3)] Compound (a3) ​​is a polyoxyalkylene-type nonionic surfactant having -COO- or -CONH-. R 15 -X-[(EO) p / ( A 13 O) q ]-(EO) r -R16 ...(a3) (In general formula (a3), R 15 is a hydrocarbon group having 7 to 21 carbon atoms. -X- is either -COO- or -CONH-. 16 is a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or an alkenyl group having 2 to 6 carbon atoms. EO is an oxyethylene group. p is a number between 3 and 25 indicating the average repeating number of EO. A 13 represents at least one of PO (oxypropylene group) and BO (oxybutylene group). q is A 13 r is a number between 0 and 6 representing the average number of repetitions of O. r is a number between 0 and 20 representing the average number of repetitions of EO.

[0029] In general formula (a3), R 15 The number of carbon atoms in the hydrocarbon group is 7 to 21, preferably 9 to 19, and more preferably 11 to 19. 15 The hydrocarbon group may be a straight chain or a branched chain. Also, R 15 The hydrocarbon group may or may not have an unsaturated bond. -X-bond R 15 The carbon atoms can be either primary or secondary carbon atoms.

[0030] R 16 If it is an alkyl group, the number of carbon atoms is 1 to 6, and preferably 1 to 3. R 16 If the group is an alkenyl group, the number of carbon atoms is 2 to 6, and preferably 2 to 3. R 16 Alkyl alkyl groups are particularly preferred.

[0031] p is between 3 and 25, with 5 to 20 being preferred, 10 to 18 being more preferred, and 12 to 18 being even more preferred, in terms of excellent cleaning power. q is between 0 and 6, and preferably between 0 and 3. r is between 0 and 20, preferably between 0 and 15, and more preferably between 0 and 10. In terms of superior cleaning power, p+r is preferably 5 to 30, more preferably 5 to 25, even more preferably 5 to 20, and particularly preferably 10 to 20.

[0032] If q is not 0, that is, if compound (a3) ​​has EO and PO, EO and BO, or EO, ​​PO and BO, then [(EO) p / ( A 13 O) q In [ ], there are no particular restrictions on the distribution (arrangement order) of EO and PO, EO and BO, or EO, ​​PO and BO; they may be arranged in blocks or randomly. Also, if EO is "R 15 -X-" may be added, or PO or BO may be "R 15 It may be combined with "-X-". If q is not 0, compound (a3) ​​preferably has EO and PO, or EO and BO. (A1) Component preferably contains compound (a1) from the viewpoint of having excellent cleaning power.

[0033] [(A2) component] (A2) The component is a non-soap-based anionic surfactant. A "non-soap-based anionic surfactant" is an anionic surfactant that excludes higher fatty acids or their salts (so-called soaps). (A2) One component may be used, or two or more components may be combined. By incorporating component (A2), the low-temperature stability of component (B) is obtained. In addition, the effect of suppressing re-soiling of clothing is obtained. Furthermore, the cleaning power is also enhanced.

[0034] The content of component (A2) is preferably 2 to 22% by mass, more preferably 5 to 20% by mass, even more preferably 7 to 18% by mass, and particularly preferably 10 to 15% by mass. (A2) When the content of component (A2) is above the lower limit, the low-temperature stability of component (B) is further enhanced. This is also preferable in terms of suppressing re-soiling and cleaning power. When the content of component (A2) is below the upper limit, good liquid stability is obtained.

[0035] (A2) Examples of components include carboxylic acid-type anionic surfactants such as linear alkylbenzene sulfonic acid or its salt (LAS), α-olefin sulfonic acid or its salt (AOS), linear or branched alkyl sulfate ester or its salt (AS), polyoxyalkylene alkyl (alkenyl) ether sulfate ester or its salt (AES), alkyl group-containing alkane sulfonic acid or its salt, α-sulfo fatty acid ester or its salt, internal olefin sulfonic acid or its salt (IOS), hydroxyalkane sulfonic acid or its salt (HAS), alkyl ether carboxylic acid or its salt, polyoxyalkylene ether carboxylic acid or its salt, alkylamide ether carboxylic acid or its salt, alkenylamide ether carboxylic acid or its salt, acylaminocarboxylic acid or its salt; and phosphate ester-type anionic surfactants such as alkyl phosphate ester or its salt, polyoxyalkylene alkyl phosphate ester or its salt, polyoxyalkylene alkylphenyl phosphate ester or its salt, glycerin fatty acid ester monophosphate ester or its salt. Examples of salt forms of anionic surfactants include alkali metal salts (sodium salts, potassium salts, etc.), alkaline earth metal salts (magnesium salts, etc.), and alkanolamine salts (monoethanolamine salts, diethanolamine salts, etc.).

[0036] Among these, LAS, AOS, AS, and AES are preferred as component (A2), and LAS and AES are more preferred from the viewpoint of further enhancing cleaning power. The liquid detergent preferably contains at least LAS, and more preferably contains both LAS and AES. Component (A2) is particularly preferably composed of LAS and AES.

[0037] Linear alkylbenzene sulfonic acid or its salt (LAS) is a compound in which a sulfo group is attached to a linear alkylbenzene, which has a linear alkyl group attached to a benzene ring. There are no particular limitations on the position to which the sulfophenyl group is attached to this linear alkyl group.

[0038] (A2) If component contains linear alkylbenzene sulfonic acid or a salt thereof, the content of linear alkylbenzene sulfonic acid or a salt thereof is preferably 3% by mass or more, more preferably 3 to 15% by mass, even more preferably 5 to 13% by mass, even more preferably 7 to 13% by mass, and particularly preferably 8 to 12% by mass, based on the total mass of the liquid detergent composition.

[0039] When the content of linear alkylbenzene sulfonic acid or its salt is above the lower limit mentioned above, fluidity at low temperatures is increased, and cleaning power is improved. In addition, when component (C) described later is added, the adsorption rate of component (C) is increased, and the color fading suppression effect and re-soiling suppression effect of component (C) are improved. Furthermore, by keeping the content of linear alkylbenzene sulfonic acid or its salt below the above upper limit, the yellowing of the liquid detergent composition's appearance can be suppressed.

[0040] Polyoxyalkylene alkyl (alkenyl) ether sulfate esters or their salts (AES) are represented by the following general formula (a4). R 17 -O-[(EO) e (PO) f ]-SO3 - M + ...(a4) (In general formula (a4), R 17 is a linear or branched alkyl group having 8 to 20 carbon atoms, or a linear or branched alkenyl group having 8 to 20 carbon atoms. EO is an oxyethylene group. PO is an oxypropylene group. e is a number greater than or equal to 0.1 representing the average repeating number of EO. f is a number between 0 and 6 representing the average repeating number of PO. [(EO) e (PO) f ] indicates that there is no restriction on the order of the sequences of EO and PO, M + (This is a counter-cation.)

[0041] The AES is preferably one having a linear or branched alkyl or alkenyl group with 10 to 20 carbon atoms, to which an average of 1 to 5 moles of alkylene oxide is added. The number of carbon atoms in the alkyl or alkenyl group is preferably 10 to 20, and more preferably 12 to 14. In particular, a linear alkyl group with 10 to 20 carbon atoms is preferred, and a linear alkyl group with 12 to 14 carbon atoms is more preferred. Specifically, examples include dodecyl groups, tridecyl groups, and tetradecyl groups.

[0042] e is preferably 0.1 to 5, more preferably 0.1 to 3, even more preferably 0.5 to 2, and particularly preferably 0.5 to 1.5. f is between 0 and 6, preferably between 0 and 3, and more preferably 0. e+f is preferably greater than 0, and more preferably between 1 and 5.

[0043] If f is not 0, that is, if AES has EO and PO, then [(EO) e (PO) f In [], there are no particular restrictions on the distribution (order of arrangement) of EO and PO; they may be arranged in blocks or randomly. Also, if EO is "R 17 -O-" can be used to bind to "R 17 It may be combined with "-O-".

[0044] Methods for arranging EO and PO in a block-like manner include, for example, introducing ethylene oxide followed by propylene oxide, introducing propylene oxide followed by ethylene oxide, introducing ethylene oxide followed by propylene oxide, and then introducing ethylene oxide again. Furthermore, it is preferable that the compounds e=0 and f=0 in formula (a4) are present in an amount of 35 to 55% by mass relative to the total mass of the compounds represented by formula (a4).

[0045] [(A1) / (A2)] The ratio of the mass of component (A1) to the mass of component (A2) [(A1) / (A2)] is 1.5 to 8, preferably 1.5 to 5, and more preferably 2.0 to 4.0. When the ratio [(A1) / (A2)] is above the lower limit, component (B) can be stably blended even at low temperatures. Furthermore, cleaning power is improved. When the ratio [(A1) / (A2)] is below the upper limit, stability at low temperatures is achieved, and fluidity at low temperatures is easily ensured. Furthermore, cleaning power is improved.

[0046] <(B) component> Component (B) is at least one selected from the following components (B1), (B2), and (B3). By including component (B), a color fading suppression effect can be obtained.

[0047] (B1) Components: Aliphatic monohydric alcohols with 18 to 26 carbon atoms. (B2) Components: Monoglycerides or diglycerides, which are esters consisting of one or two straight-chain fatty acids having 12 to 26 carbon atoms and glycerol. (B3) Components: A fatty acid ester having 20 to 38 carbon atoms, comprising a fatty acid and an aliphatic monohydric alcohol, and having a linear alkyl chain with 12 to 26 carbon atoms.

[0048] The content of component (B) is 0.01 to 3% by mass relative to the total mass of the liquid detergent composition, preferably 0.1 to 2.8% by mass, more preferably 0.2 to 2.0% by mass, and even more preferably 0.3 to 1.2% by mass. (B) A fading-suppressing effect is obtained when the content of component (B) is above the lower limit. (B) Stability at low temperatures is obtained when the content of component (B) is below the upper limit.

[0049] The ratio of the total mass of component (B) to the mass of component (A) [(B) / (A)] is preferably 0.004 to 0.05, more preferably 0.005 to 0.03, and even more preferably 0.007 to 0.02. When the ratio [(B) / (A)] is above the lower limit, the fade-prevention effect is enhanced. When the ratio [(B) / (A)] is below the upper limit, the stability at low temperatures is enhanced.

[0050] Component (B) preferably includes at least one selected from component (B3). Component (B) is particularly preferably composed of at least one selected from component (B3). Component (B3) maintains its stability at low temperatures even when its concentration is increased. Therefore, when using component (B3), it is easier to increase the amount of component (B3) in the liquid detergent composition to enhance the fade-resistant effect. In addition, component (B3) exhibits a fade-resistant effect even in small amounts.

[0051] [(B1) component] Component (B1) is an aliphatic monohydric alcohol with 18 to 26 carbon atoms. The carbon number of component (B1) is preferably 18 to 22, and more preferably 18 to 20. A carbon number above the lower limit allows it to act more readily on the surface of clothing, resulting in a high colorfastness-inhibiting effect. A carbon number below the upper limit enhances stability at low temperatures.

[0052] The aliphatic hydrocarbon group to which the hydroxyl group of component (B1) is bonded may be linear or branched. It may also be saturated or unsaturated. (B1) The component may be a fatty alcohol derived from natural oils and fats, or a synthetic alcohol derived from petrochemical products.

[0053] (B1) Examples of components include octyldodecanol, stearyl alcohol, isostearyl alcohol, oleyl alcohol, nonadecyl alcohol, arachidyl alcohol, heneicosanol, behenyl alcohol, lignoceryl alcohol, 2-decyl-1-tetradecanol, and ceryl alcohol. Among these, arachidyl alcohol and octyldodecanol are preferred, and octyldodecanol is more preferred, as they easily improve the fade-inhibiting effect while maintaining stability at low temperatures.

[0054] If component (B) consists of at least one selected from component (B1), the content of component (B1) is 0.01 to 3% by mass, preferably 0.2 to 1.0% by mass, and more preferably 0.2 to 0.4% by mass, relative to the total mass of the liquid detergent composition. (B1) A fading-inhibiting effect is obtained when the content of component (B1) is above the lower limit. (B1) Stability at low temperatures is obtained when the content of component (B1) is below the upper limit.

[0055] If component (B) consists of at least one selected from component (B1), the ratio of the mass of component (B1) to the mass of component (A) [(B1) / (A)] is preferably 0.004 to 0.022, and more preferably 0.007 to 0.010. When the ratio [(B1) / (A)] is above the lower limit, the fade-inhibiting effect is enhanced. When the ratio [(B1) / (A)] is below the upper limit, the stability of the (B1) component at low temperatures is enhanced.

[0056] [(B2) component] (B2) Component is a monoglyceride or diglyceride, which is an ester consisting of one or two straight-chain fatty acids having 12 to 26 carbon atoms and glycerol. Component (B2) may be monoglycerides alone, diglycerides alone, or a mixture of monoglycerides and diglycerides.

[0057] The carbon number of component (B2) is preferably 14 to 22, and more preferably 16 to 20. A carbon number above the lower limit allows it to act more readily on the surface of clothing, resulting in a high colorfastness-inhibiting effect. A carbon number below the upper limit enhances stability at low temperatures.

[0058] The linear fatty acids that combine with glycerol to form component (B2) can be saturated or unsaturated. (B2) If the component is a diglyceride, the two linear fatty acids that bind to glycerol may be the same or different. There are no particular restrictions on the position where straight-chain fatty acids bind to glycerol.

[0059] Examples of monoglycerides that make up component (B2) include glyceryl palmitate, glyceryl stearate, glyceryl oleate, glyceryl laurate, glyceryl myristate, glyceryl linoleate, glyceryl linolenic acid, glyceryl arachidonic acid, glyceryl eicosapentaenoate, and glyceryl docosahexaenoate. Among these, glyceryl palmitate, glyceryl stearate, and glyceryl oleate are preferred because they easily improve the fade-inhibiting effect while maintaining stability at low temperatures. (B2) Examples of diglycerides that are components include glyceryl dipalmitate, glyceryl distearate, glyceryl dioleate, glyceryl stearate palmitate, glyceryl oleate palmitate, and glyceryl oleate stearate.

[0060] If component (B) consists of at least one selected from component (B2), the content of component (B2) is 0.01 to 3% by mass, preferably 0.5 to 1.8% by mass, and more preferably 0.8 to 1.2% by mass, relative to the total mass of the liquid detergent composition. (B2) A fading-suppressing effect is obtained when the content of component (B2) is above the lower limit. (B2) Stability at low temperatures is obtained when the content of component (B2) is below the upper limit.

[0061] If component (B) consists of at least one selected from component (B2), the ratio of the mass of component (B2) to the mass of component (A) [(B2) / (A)] is preferably 0.011 to 0.039, and more preferably 0.017 to 0.026. When the ratio [(B2) / (A)] is above the lower limit, the fade-inhibiting effect is enhanced. When the ratio [(B2) / (A)] is below the upper limit, the stability of the (B2) component at low temperatures is enhanced.

[0062] [(B3) component] Component (B3) is a fatty acid ester having 20 to 38 carbon atoms, consisting of a fatty acid and an aliphatic monohydric alcohol, and having a linear alkyl chain having 12 to 26 carbon atoms. The linear alkyl chain having 12 to 26 carbon atoms is derived from at least one of the fatty acid and aliphatic monohydric alcohol that constitute component (B3).

[0063] In other words, component (B3) is a fatty acid ester having 20 to 38 carbon atoms, consisting of a fatty acid and an aliphatic monohydric alcohol, and is a fatty acid ester consisting of a fatty acid having a carboxyl group at the end of a linear alkyl chain having 12 to 26 carbon atoms and a monohydric alcohol, or a fatty acid ester consisting of a monohydric alcohol having a hydroxyl group at the end of a linear alkyl chain having 12 to 26 carbon atoms and a fatty acid.

[0064] Component (B3) also includes fatty acid esters having 20 to 38 carbon atoms, which consist of a fatty acid and an aliphatic monohydric alcohol, and which consist of a fatty acid having a carboxyl group at the end of a linear alkyl chain having 12 to 26 carbon atoms and a monohydric alcohol having a hydroxyl group at the end of a linear alkyl chain having 12 to 26 carbon atoms.

[0065] The total number of carbon atoms in component (B3) is 20 to 38, preferably 22 to 32, and more preferably 24 to 28. Having a total carbon number above the lower limit allows the carbon to easily act on the surface of clothing, resulting in a high fade-prevention effect. Having a carbon number below the upper limit increases stability at low temperatures.

[0066] The linear alkyl chain derived from at least one of the fatty acid and aliphatic monohydric alcohol of component (B3) has 12 to 26 carbon atoms, preferably 14 to 22, and more preferably 16 to 20. When the number of carbon atoms in the linear alkyl chain is above the lower limit, it acts easily on the surface of clothing, resulting in a high colorfastness-inhibiting effect. When the number of carbon atoms in the linear alkyl chain is below the upper limit, stability at low temperatures is enhanced.

[0067] The aliphatic hydrocarbon group, which consists of a fatty acid having a carboxyl group at the end of a linear alkyl chain with 12 to 26 carbon atoms and a hydroxyl group of a monohydric alcohol constituting component (B3), may be linear or branched. It may also be saturated or unsaturated. The aliphatic hydrocarbon group, to which a hydroxyl group is bonded to a monohydric alcohol having a hydroxyl group at the end of a linear alkyl chain with 12 to 26 carbon atoms and a carboxyl group of a fatty acid constituting component (B3), may be linear or branched. It may also be saturated or unsaturated.

[0068] (B3) Examples of components include ethylhexyl palmitate, cetyl palmitate, cetearyl isonanoate, stearyl isononanoate, cetyl isononanoate, cetyl ethylhexanoate, ethylhexyl stearate, decyl oleate, myristyl myristate, and octyldodecyl myristate. Among these, ethylhexyl palmitate, cetyl ethylhexanoate, cetearyl isonanoate, stearyl isononanoate, cetyl isononanoate, and ethylhexyl stearate are preferred because they easily improve the fade-inhibiting effect while maintaining stability at low temperatures, and ethylhexyl palmitate and cetyl ethylhexanoate are more preferred.

[0069] If component (B) consists of at least one selected from component (B3), the content of component (B3) is 0.01 to 3% by mass, preferably 0.2 to 1.8% by mass, more preferably 0.3 to 1.0% by mass, and even more preferably 0.3 to 0.5% by mass, relative to the total mass of the liquid detergent composition. (B3) A fading-inhibiting effect is obtained when the content of component (B3) is above the lower limit. (B3) Stability at low temperatures is obtained when the content of component (B3) is below the upper limit.

[0070] If component (B) consists of at least one selected from component (B3), the ratio of the mass of component (B3) to the mass of component (A) [(B3) / (A)] is preferably 0.004 to 0.039, and more preferably 0.011 to 0.022. When the ratio [(B3) / (A)] is above the lower limit, the fade-inhibiting effect is enhanced. When the ratio [(B3) / (A)] is below the upper limit, the stability of the (B3) component at low temperatures is enhanced.

[0071] <(C) component> Component (C) is a water-soluble polymer having at least one unit selected from the group consisting of alkylene terephthalate units and alkylene isophthalate units ((c1) unit) and at least one unit selected from the group consisting of oxyalkylene units and polyoxyalkylene units ((c2) unit). The inclusion of component (C) enhances the colorfastness-inhibiting effect. It also helps to suppress re-soiling of clothing.

[0072] If the liquid detergent composition contains component (C), the content of component (C) is preferably 0.5 to 5.0% by mass, more preferably 0.7 to 3.5% by mass, even more preferably 0.7 to 3.0% by mass, and particularly preferably 1.5 to 3.0% by mass, based on the total mass of the liquid detergent composition. (C) When the content of component (C) is above the lower limit above, the fade-inhibiting effect is further enhanced. The re-soiling inhibition effect is also enhanced. When the content of component (C) is below the upper limit above, the liquid stability is enhanced. Furthermore, yellowing of the liquid's appearance can also be suppressed.

[0073] (c1) The unit is at least one unit selected from the group consisting of alkylene terephthalate units and alkylene isophthalate units. The alkylene terephthalate unit is represented by the following formula (c1-1).

[0074] [ka]

[0075] In formula (c1-1), R 31 R is a lower alkylene group. 31 The number of carbon atoms is preferably 1 to 5, more preferably 1 to 4, and even more preferably 2 to 4. Examples of alkylene terephthalate units include ethylene terephthalate units, n-propylene terephthalate units, isopropylene terephthalate units, n-butylene terephthalate units, isobutylene terephthalate units, sec-butylene terephthalate units, and tert-butylene terephthalate units. Among these, isopropylene terephthalate units are preferred. That is, R 31 Specifically, examples include ethylene, n-propylene, isopropylene, n-butylene, isobutylene, and sec-butylene, with isopropylene being preferred. Component (C) may contain one of these alkylene terephthalate units alone, or it may contain two or more of them.

[0076] The alkylene isophthalate unit is represented by the following formula (c1-2).

[0077] [ka]

[0078] In formula (c1-2), R 41 R is a lower alkylene group. 41 The number of carbon atoms is preferably 1 to 5, more preferably 1 to 4, and even more preferably 2 to 4. Examples of alkylene isophthalate units include ethylene isophthalate units, n-propylene isophthalate units, isopropylene isophthalate units, n-butylene isophthalate units, sec-butylene isophthalate units, and tert-butylene isophthalate units. Among these, isopropylene isophthalate units are preferred. That is, R 41 Specifically, examples include ethylene, propylene, n-butylene, sec-butylene, and tert-butylene, with propylene being preferred. Component (C) may contain one of these alkylene isophthalate units alone, or it may contain two or more of them.

[0079] Component (C) may have both alkylene terephthalate units and alkylene isophthalate units as (c1) units, or it may have only one of either alkylene terephthalate units or alkylene isophthalate units. It is more preferable for component (C) to have both alkylene terephthalate units and alkylene isophthalate units. The number of repeating units (c1) in one molecule of component (C) is preferably 1 to 10, more preferably 1 to 6, and even more preferably 1 to 4.

[0080] (c2) The unit is at least one unit selected from the group consisting of oxyalkylene units and polyoxyalkylene units. (c2) The unit is expressed by the following formula (c2-1).

[0081] -(R 51 O) w - ···(c2-1)

[0082] In formula (c2-1), R 51 The number of carbon atoms in the lower alkylene group is preferably 1 to 4, more preferably 2 to 4, and even more preferably 2 or 3. w is (R 51 The number of repeats in O) is expressed as the average number of repetitions. When w is 1, the unit shown in formula (c2-1) is an oxyalkylene unit, and when w is 2 or greater, the unit shown in formula (c2-1) is a polyoxyalkylene unit. w is an integer from 1 to 100, preferably from 1 to 80, and more preferably from 1 to 50.

[0083] (c2) Examples of units include oxyethylene units, polyoxyethylene units, oxypropylene units, polyoxypropylene units, polyoxyethylene-polyoxypropylene units, etc., with oxyethylene units or polyoxyethylene units being preferred. (c2) units can be used alone or in combination of two or more units selected from the above oxyalkylene units and polyoxyalkylene units. That is, the component (C) may have only oxyethylene units, only oxypropylene units, or both oxyethylene units and oxypropylene units as the repeating unit (c2) in one molecule thereof. Also, the component (C) may have only oxyalkylene units, only polyoxyalkylene units, or both oxyalkylene units and polyoxyalkylene units.

[0084] The component (C) may be a polymer in which the (c1) units and the (c2) units are polymerized in a block form or a polymer in which they are polymerized in a random form. Among these, as the component (C), a polymer in which the (c1) units and the (c2) units are polymerized in a block form is preferable. The component (C) may contain units other than the (c1) units and the (c2) units (for example, units derived from a polymerization initiator, a polymerization terminator, etc., and other units capable of polymerizing with the (c1) units or the (c2) units). However, the total of the (c1) units and the (c2) units is preferably 80 mol% or more, more preferably 90 mol% or more, based on the total amount of the repeating units in the component (C).

[0085] Examples of the component (C) include compounds represented by the following formula (C1-1) or the following general formula (C1-2).

[0086]

Chemical formula

[0087] In the formula (C1-1), Z 1 are each independently a hydrogen atom or a methyl group, preferably both are methyl groups. R 61 and R 62Each is independently an alkylene group having 2 to 4 carbon atoms, preferably an alkylene group having 2 to 3 carbon atoms. x 1 is a number from 0 to 10 representing the average repeating number of the constitutional unit, preferably 0.5 to 5, more preferably 0.5 to 2.5. x 1 When x is at least the above lower limit value, the effect of suppressing color fading is excellent. x 1 When x is at most the above upper limit value, a liquid detergent excellent in appearance stability is easily obtained. y 1 is a number representing the average repeating number of (R 61 O), and each is independently preferably 1 to 100, more preferably 1 to 80, still more preferably 1 to 50, particularly preferably 10 to 50, and most preferably 20 to 30. y 1 When y is within the above preferred range, the compounding effects of component (C) such as color fading suppression and re-staining prevention are enhanced, and the solubility in water is also enhanced. In formula (C1-1), x 1 and y 1 The ratio of x 1 :y 1 is preferably 1:5 to 1:20, more preferably 1:8 to 1:18. When (x 1 :y 1 ) is within the above range, the compounding effects of component (C) such as color fading suppression and re-staining prevention are enhanced, and the solubility in water is also enhanced.

[0088]

Chemical formula

[0089] In formula (C1-2), Z 2 is each independently a hydrogen atom or a methyl group, preferably both are methyl groups. R 63 and R 64 are each independently an alkylene group having 2 to 4 carbon atoms, preferably an alkylene group having 2 to 3 carbon atoms. x 2x is a number between 0 and 10 that represents the average number of repetitions of the constituent units, preferably between 0.5 and 5, and more preferably between 0.5 and 2.5. 2 If the value is above the lower limit mentioned above, it exhibits excellent fade-prevention effects. 2 If the value is below the above upper limit, liquid detergents with excellent appearance stability are more likely to be produced. y 2 is, (R 63 This number represents the average number of repetitions in O), and each is independently preferably 1 to 100, more preferably 1 to 80, even more preferably 1 to 50, particularly preferably 10 to 50, and most preferably 20 to 30. 2 When the values ​​are within the aforementioned preferred range, the effects of the (C) component, such as fading suppression and re-soiling prevention, are further enhanced, and the solubility in water is also improved. In equation (C1-2), the ratio of x² to y² is (x 2 :y 2 ) is preferably 1:5 to 1:20, and more preferably 1:8 to 1:18. (x 2 :y 2 When the above range is maintained, the effects of the (C) component, such as fading suppression and re-soiling prevention, are further enhanced, and the solubility in water is also further improved.

[0090] The mass-average molecular weight of component (C) is preferably 500 to 10,000. When the mass-average molecular weight is within the above range, the solubility and dispersibility in water are improved, and the fade-inhibiting effect and re-soiling prevention effect are more easily enhanced. The lower limit of the mass-average molecular weight of component (C) is more preferably 800 or higher, and even more preferably 1,000 or higher. The upper limit of the mass-average molecular weight of component (C) is more preferably 9,000 or less, and even more preferably 8,000 or less. Therefore, the mass-average molecular weight of component (C) is more preferably 800 to 9,000, even more preferably 1,000 to 8,000, and particularly preferably 1,000 to 5,000.

[0091] (C) The mass-average molecular weight of component (C) is the value obtained by measuring the value using GPC (gel permeation chromatography) with THF (tetrahydrofuran) as the solvent, and then converting it using PEG (polyethylene glycol) as the calibration curve.

[0092] Component (C) is readily available on the market. Alternatively, component (C) may be synthesized by methods described in various publications. Examples of publications describing methods for producing component (C) include the Journal of Polymer Science, Vol. 3, pp. 609-630 (1948), the Journal of Polymer Science, Vol. 8, pp. 1-22 (1951), and Japanese Patent Publication No. 61-218699.

[0093] Examples of commercially available products containing component (C) include polyester soil release agents such as Repel-o-tex® polymer (including SF, SF-2, and SRP6) supplied by Rhodia. Other suitable soil-releasing agents include Texcare® polymers (including SRA100, SRA300, SRN100, SRN170, SRN170C, SRN240, SRN300, and SRN325) supplied by Clariant, and Marloquest polymers such as Marloquest® SL supplied by Sasol.

[0094] Among these, "TexCare SRN-100" (weight-average molecular weight 2,000-3,000) is preferred due to its high solubility in water and excellent storage stability. Furthermore, "TexCare SRN-170C," a 70% aqueous solution of "TexCare SRN-100" manufactured by Clariant, is preferred due to its ease of handling.

[0095] <Total content of component (B) and component (C)> The total content of component (B) and component (C) is preferably 0.2 to 3.4% by mass, more preferably 1.2 to 3.0% by mass, and even more preferably 1.7 to 2.5% by mass, based on the total mass of the liquid detergent composition. When the total content of component (B) and component (C) is above the lower limit, the color fading suppression effect is enhanced. When the total content of component (B) and component (C) is below the upper limit, liquid stability at low temperatures is achieved.

[0096] <(D) component> Component (D) is at least one selected from the group consisting of alkylene oxide adducts of polyalkyleneimines (hereinafter also referred to as "component (D11)") and alkylene oxide adducts of polyalkyleneamines (hereinafter also referred to as "component (D12)"). The inclusion of component (D) enhances the colorfastness-inhibiting effect. It also helps to suppress re-soiling of clothing.

[0097] Component (D11) is an alkylene oxide adduct of a polyalkylene imine. Polyalkyleneimines are represented by the following formula (d1). NH2-R 21 -(NA 21 -R 21 ) n -NH2···(d1) (In formula (d1), R 21 Each of these is independently an alkylene group having 2 to 6 carbon atoms, and A 21 represents a hydrogen atom or another polyamine chain formed by branching, and n is a number of 1 or more. However, A 21 (Not all of them are hydrogen atoms.)

[0098] R 21 This is a linear alkylene group having 2 to 6 carbon atoms or a branched alkylene group having 3 to 6 carbon atoms. 21 The alkylene group having 2 to 4 carbon atoms is preferred, and the alkylene group having 2 carbon atoms is more preferred. Polyalkyleneimines are obtained by polymerizing one or more alkyleneimines having 2 to 6 carbon atoms by conventional methods. Examples of alkyleneimines having 2 to 6 carbon atoms include ethyleneimine, propyleneimine, 1,2-butyleneimine, 2,3-butyleneimine, and 1,1-dimethylethyleneimine. As the polyalkylene imine, polyethyleneimine (PEI) and polypropyleneimine are preferred, with PEI being more preferred. PEI is obtained by polymerizing ethyleneimine and has a branched chain structure containing primary, secondary, and tertiary amine nitrogen atoms in its structure.

[0099] The weight-average molecular weight of the polyalkyleneimine is preferably 200 to 2,000, more preferably 300 to 1,500, even more preferably 400 to 1,000, and particularly preferably 500 to 800. In this specification, the weight-average molecular weight refers to the value obtained by gel permeation chromatography (GPC) using polyethylene glycol as the standard substance.

[0100] The polyalkylene imine is preferably one that has 5 to 30 active hydrogen atoms per molecule, more preferably one that has 7 to 25, and even more preferably one that has 10 to 20.

[0101] Component (D11) is obtained by adding an alkylene oxide to a polyalkylene imine. Examples of this method include adding an alkylene oxide such as ethylene oxide to the starting material, a polyalkylene imine, at 100-180°C in the presence of a basic catalyst such as sodium hydroxide, potassium hydroxide, or sodium methylate. Examples of alkylene oxides include alkylene oxides having 2 to 4 carbon atoms. Examples of the alkylene oxides include ethylene oxide, propylene oxide, and butylene oxide, with ethylene oxide and propylene oxide being preferred, and ethylene oxide being more preferred.

[0102] (D11) Examples of components include ethylene oxide adducts of polyalkyleneimines, propylene oxide adducts of polyalkyleneimines, and ethylene oxide-propylene oxide adducts of polyalkyleneimines. The ethylene oxide-propylene oxide adducts of polyalkyleneimines are obtained by adding ethylene oxide and propylene oxide to polyalkyleneimines, and the order of addition of ethylene oxide and propylene oxide to the polyalkyleneimine, as well as the form of addition (block-like, random), are arbitrary. (D11) The ethylene oxide adduct of polyalkyleneimine and the ethylene oxide-propylene oxide adduct of polyalkyleneimine are preferred, and the ethylene oxide adduct of polyalkyleneimine is more preferred.

[0103] (D11) Component is preferably one in which an average of 5 to 40 alkylene oxides are added to one active hydrogen atom of the raw material polyalkyleneimine, and preferably one in which an average of 10 to 30 alkylene oxides are added. That is, it is preferably one in which an average of 5 to 40 moles of alkylene oxides are added to one mole of active hydrogen of the raw material polyalkyleneimine, and preferably one in which an average of 10 to 30 moles of alkylene oxides are added.

[0104] The weight-average molecular weight of component (D11) is preferably 1,000 to 80,000, more preferably 2,000 to 50,000, even more preferably 5,000 to 30,000, and particularly preferably 10,000 to 20,000. (D11) Examples of components include compounds represented by the following formula (d1-1).

[0105] [ka]

[0106] In formula (d1-1), R 22 Each of these is an alkylene group having 2 to 6 carbon atoms, and each of these is an independent number greater than or equal to 1. R 22 The alkylene group having 2 or 3 carbon atoms is preferred, and the alkylene group having 2 carbon atoms is more preferred. m is (R 22 This is the average number of repeats of O), preferably 5 to 40, and more preferably 10 to 30. In this specification, the average number of repeats of the oxyalkylene group (alkylene oxide) is also referred to as the "average number of moles added". (D11) The component may be a synthetic product or a commercially available product. (D11) Examples of commercially available products containing this component include BASF's product "Sokalan HP20".

[0107] Component (D12) is an alkylene oxide adduct of a polyalkyleneamine. Polyalkyleneamines are represented by the following formula (d2). NH2(R 23 NH) l H ···(d2) (In formula (d2), R 23 (where l is an alkylene group with 2 to 6 carbon atoms, and l is a number greater than or equal to 1.)

[0108] R 23 This is a linear alkylene group having 2 to 6 carbon atoms or a branched alkylene group having 3 to 6 carbon atoms. 31 The alkylene group having 2 to 4 carbon atoms is preferred, and the alkylene group having 2 carbon atoms is more preferred. Polyethyleneamines are preferred as polyalkyleneamines. Examples of polyethyleneamines include ethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, and pentaethylenehexamine. These polyethyleneamines can be obtained by known production methods, for example, by reacting ammonia with ethylene dichloride.

[0109] The weight-average molecular weight of the polyalkyleneamine is preferably 60 to 1800, more preferably 60 to 1000, and even more preferably 60 to 800.

[0110] The polyalkyleneamine is preferably one that has 6 to 30 active hydrogen atoms in one molecule, and more preferably one that has 7 to 20 active hydrogen atoms.

[0111] Component (D12) is obtained by adding an alkylene oxide to a polyalkyleneamine. This reaction can be carried out in the same manner as for component (D11). Examples of alkylene oxides include those having 2 to 4 carbon atoms. Examples of the alkylene oxide include ethylene oxide, propylene oxide, and butylene oxide, with ethylene oxide and propylene oxide being preferred, and ethylene oxide being more preferred.

[0112] (D12) Examples of components include ethylene oxide adducts of polyalkyleneamines, propylene oxide adducts of polyalkyleneamines, and ethylene oxide-propylene oxide adducts of polyalkyleneamines. (D12) The ethylene oxide adduct of polyalkyleneamine and the ethylene oxide-propylene oxide adduct of polyalkyleneamine are preferred, and the ethylene oxide adduct of polyalkyleneamine is more preferred.

[0113] (D12) Component is preferably one in which an average of 5 to 40 alkylene oxides are added to one active hydrogen atom of the raw material polyalkyleneamine, and preferably one in which an average of 10 to 30 alkylene oxides are added. That is, it is preferably one in which an average of 5 to 40 moles of alkylene oxides are added to one mole of active hydrogen of the raw material polyalkyleneamine, and preferably one in which an average of 10 to 30 moles of alkylene oxides are added.

[0114] The weight-average molecular weight of component (D12) is preferably 1,000 to 80,000, more preferably 2,000 to 50,000, even more preferably 5,000 to 30,000, and particularly preferably 10,000 to 20,000.

[0115] (D) Component (D11) is preferred. Among the (D11) components, the ethylene oxide adduct of polyethyleneimine is preferred. Component (D) may be used alone or in combination of two or more types.

[0116] The content of component (D) is preferably 0.1 to 10% by mass, and more preferably 1 to 5% by mass, relative to the total mass of the liquid detergent composition. When the content of component (D) is above the lower limit, discoloration of the items being washed can be suppressed more effectively. When the content of component (D) is below the upper limit, the liquid stability at low temperatures can be further improved.

[0117] <Other surfactants> The liquid detergent composition of the present invention may contain surfactants other than component (A) (other surfactants). Other surfactants include cationic surfactants, semipolar surfactants, and bipolar surfactants. These other surfactants may be used individually or in combination of two or more.

[0118] Examples of cationic surfactants include quaternary ammonium salts. Examples of quaternary ammonium salts include alkali metal salts (sodium salts, potassium salts, etc.), alkaline earth metal salts (magnesium salts, etc.), and alkanolamine salts (monoethanolamine salts, diethanolamine salts, etc.). Cationic surfactants may be used individually or in combination of two or more types.

[0119] Examples of amphoteric surfactants include alkylbetaine type, alkylamidebetaine type, imidazoline type, alkylaminosulfone type, alkylaminocarboxylic acid type, alkylamidecarboxylic acid type, amide amino acid type, and phosphate type amphoteric surfactants. Amphoteric surfactants may be used individually or in combination of two or more types.

[0120] Examples of semi-polar surfactants include alkylamine oxide, alkyldimethylamine oxide, and the like. The semi-polar surfactant may be used alone or in combination of two or more.

[0121] <pH adjuster> The liquid detergent composition of the present invention may contain a pH adjuster. Examples of pH adjusters include hydrochloric acid, sulfuric acid, phosphoric acid, para-toluenesulfonic acid, sodium hydroxide, potassium hydroxide, monoethanolamine, diethanolamine, triethanolamine, ammonia, and the like. The pH adjuster may be used alone or in appropriate combination of two or more.

[0122] <Other optional components> In addition to those described above, the liquid detergent composition of the present invention may contain, as optional components, chelating agents, enzymes, water-miscible solvents, higher fatty acids or their salts, structuring agents, thickeners other than structuring agents, antibacterial agents, preservatives, antioxidants, inorganic reducing agents, enzyme stabilizers, texture improvers, anti-migration agents, colorants, fragrances, emulsifying agents, fluorescent agents, cationized polymers, anti-discoloration agents, hydrotropes, bleaching agents, pearlescent agents, extracts of natural products, and the like. Examples of enzymes include protease, amylase, lipase, cellulase, mannanase, and the like.

[0123] A water-miscible organic solvent is an organic solvent that dissolves 25 g or more in 1 L of water at 25°C. Examples of water-miscible organic solvents include alcohols such as ethanol, glycerin, 1-propanol, 2-propanol, 1-butanol, and 3-methoxy-3-methyl-1-butanol (Solfit, trade name); glycols such as propylene glycol (PG), butylene glycol, and hexylene glycol; polyglycols such as diethylene glycol, triethylene glycol, tetraethylene glycol, polyethylene glycol with a molecular weight of approximately 200 to 1,000, and dipropylene glycol; and alkyl ethers such as diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether (butyl carbitol), and diethylene glycol dimethyl ether.

[0124] Examples of higher fatty acids or their salts include single fatty acids or their salts such as caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, hydroxystearic acid, oleic acid, and behenic acid; and mixed fatty acids or their salts such as coconut fatty acid and beef tallow fatty acid. The antifoaming properties of a liquid detergent composition are enhanced when it contains higher fatty acids or their salts (soap). "Antifoaming properties" specifically refer to the ability to suppress foaming when using a liquid detergent composition for laundry, particularly when the liquid detergent composition is diluted with tap water or similar.

[0125] Examples of antimicrobial agents include diclosan, triclosan, isopropylmethylphenol, polylysine, and polyhexamethylene biguanide. Among these, antimicrobial agents having a diphenyl structure are preferred, with diclosan and triclosan being more preferred. Antimicrobial agents may be used individually or in combination of two or more types.

[0126] <Physical properties> The pH of the liquid detergent composition is preferably 6.2 to 8.3 at 25°C, and more preferably 6.5 to 7.25. Maintaining a pH within this range enhances the stability of the components after storage. Furthermore, achieving near-neutrality increases safety during use. The viscosity of the liquid detergent composition at 25°C, as measured with a Type B viscometer, is preferably 10 to 1,000 mPa·s, and more preferably 10 to 500 Pa·s. This viscosity allows for easy handling when measuring the liquid detergent.

[0127] <Manufacturing method> The liquid detergent composition of the present invention can be manufactured in accordance with conventionally known methods for manufacturing liquid detergent compositions. For example, it can be prepared by dissolving component (A), component (B), component (C) as needed, and other optional components in a portion of water, adjusting the pH with a pH adjuster as needed, and then adding the remaining water.

[0128] <How to use> Methods of using the liquid detergent composition include, for example, putting the liquid detergent composition into the liquid detergent composition dispenser of a washing machine and then operating the washing machine; adding the liquid detergent composition to the water together with the items to be washed during washing; immersing the items to be washed in a detergent solution prepared by dissolving the liquid detergent composition in water beforehand; and applying the liquid detergent composition directly to the items to be washed, leaving it for, for example, 3 minutes to 24 hours, and then performing a normal wash.

[0129] Furthermore, it is preferable to use a washing machine equipped with an automatic detergent dispenser, which has been put into practical use in recent years. The automatic detergent dispenser is a device that automatically dispenses the liquid detergent composition from a tank containing the liquid detergent composition into the washing tub via a filter for removing debris located at the bottom of the tank and a dispensing pipe. A measuring means such as a syringe pump is provided in the middle of the dispensing pipe, allowing a fixed amount set according to the amount of laundry, etc., to be transferred from the tank to the washing tub. Using an automatic detergent dispenser not only eliminates the hassle of measuring, but also prevents liquid detergent from getting on your hands or spilling and staining the washing machine or surrounding area during the measuring process.

[0130] Furthermore, it is preferable to use an automatic dispenser that can automatically dispense a predetermined amount of liquid. Using an automatic dispenser is also preferable because it allows for accurate measurement of even small amounts of liquid cleaning agent composition, making it easier to achieve sufficient cleaning power and avoiding waste due to overuse. Some automatic dispensers utilize infrared sensors or similar technologies to dispense liquids automatically without requiring the user to touch any switches. Using such an automatic dispenser allows users to measure out liquid detergent compositions simply by holding a container in one hand, significantly reducing the burden on the user.

[0131] Furthermore, when using an automatic dispenser, it is preferable to receive the liquid detergent composition dispensed into a flexible container and then place that flexible container directly into the washing machine. This ensures that the entire amount of the dispensed liquid detergent composition is reliably dissolved in the washing solution. Examples of materials for flexible containers that can be directly put into a washing machine include silicone resin, polyvinyl chloride, elastomer, flexible polyester, flexible polypropylene, and polyurethane.

[0132] Examples of items to be washed include clothing, dishcloths, towels, sheets, curtains, and other textile products. The material of the textile products is not particularly limited and may be any of the following: natural fibers such as cotton, silk, and wool, or synthetic fibers such as polyester and polyamide. When using a liquid detergent composition dissolved in water, it is preferable to dilute it, for example, 5 to 6,000 times (by volume). The bath ratio (mass of washing solution / mass of clothing), which is the amount of water per unit of clothing, is preferably 5 or higher for drum-type washing machines and 10 or higher for top-loading washing machines. The liquid detergent composition is suitable as a detergent for textile products. [Examples]

[0133] The present invention will be described in detail below with reference to examples, but the present invention is not limited to the following description. The raw materials used in this embodiment are as shown in the <Raw Materials Used> section below.

[0134] <Raw materials used> [(A) component] ·A1-1:AE(7), a polyoxyethylene alkyl ether obtained by adding 7 moles of ethylene oxide to a linear alcohol having 12 to 14 carbon atoms (manufactured by Lion Specialty Chemicals Co., Ltd., trade name "Leox CL-70", in formula (a1) above, R 11 R is a linear alkyl group having 12 to 14 carbon atoms. 12 A compound in which is a hydrogen atom, with s = 0, t = 0, and u = 7.

[0135] ·A1-2:AE(12), a polyoxyethylene alkyl ether obtained by adding 12 moles of ethylene oxide to a linear alcohol having 12 to 14 carbon atoms. In formula (a1) above, R 11 R is a linear alkyl group having 12 to 14 carbon atoms. 12 A compound in which the atom is a hydrogen atom, and s is 0, t is 0, and u is 12.

[0136] ·A1-3:AE(15), a polyoxyethylene alkyl ether obtained by adding 15 moles of ethylene oxide to a linear alcohol having 12 to 14 carbon atoms. In formula (a1) above, R 11 R is a linear alkyl group having 12 to 14 carbon atoms. 12 A compound in which is a hydrogen atom, with s = 0, t = 0, and u = 15.

[0137] ·A1-4: Branched AE(7), a polyoxyethylene alkyl ether obtained by adding 7 moles of ethylene oxide to a branched alcohol having 12 to 14 carbon atoms. In formula (a2) above, R 13 R is a branched alkyl group having 12 to 14 carbon atoms. 14 A compound in which the atom is a hydrogen atom, and v is 0, w is 0, and x is 7.

[0138] A2-1: LAS-H, a linear alkylbenzene sulfonic acid having an alkyl group with 10 to 14 carbon atoms (manufactured by Lion Specialty Chemicals Co., Ltd., product name "Lypon LH-200").

[0139] ·A2-2:AES(1), a mixture of polyoxyethylene alkyl ether sodium sulfate (having a linear alkyl group with 12 carbon atoms (C12) and an average number of repeating oxyethylene groups of 1, and having a linear alkyl group with 14 carbon atoms (C14) and an average number of repeating oxyethylene groups of 1) (mass ratio C12:C14=75:25). In the above formula (a4), R 17 A compound in which C1 is a linear alkyl group having 12 or 14 carbon atoms, m is 1, n is 0, and M is sodium.

[0140] [(B) Component] B-1: Octyldodecanol, trade name "Eutanol(registered trademark) G-JP", manufactured by BASF. • B-2: Aqueous blend of alkyl polyglucoside, partially esterified fatty acids, and glycerol, trade name "Plantatex® LLE", manufactured by BASF. B-3: Ethylhexyl palmitate, trade name "Cegesoft® C24RC", manufactured by BASF.

[0141] • B-4: Cetyl ethylhexanoate, trade name "Cetiol(registered trademark) SN1", manufactured by BASF. B-5: A mixture of cetearyl isononanoate, ceteareth-20, cetearyl alcohol, glyceryl stearate, glycerin, ceteareth-12, and cetyl palmitate, trade name "Emulgade(registered trademark)CM", manufactured by BASF.

[0142] [(BX) component] • BX-1: Polyoxyethylene coconut oil fatty acid glyceryl, trade name "Cetiol(registered trademark) HE-JP", manufactured by BASF.

[0143] [(C) component] ·C-1: Soil release agent, mass-average molecular weight = 2,000~3,000, pH (5% by mass aqueous solution at 20°C) = 4, viscosity (20°C) = 300 mPa·s. Product name "Texcare (registered trademark) SRN170C", manufactured by CLARIANT. TexCare SRN-170C is a 70% by mass aqueous solution of product name: TexCare SRN-100 (manufactured by Clariant Japan, mass-average molecular weight: 2,000~3,000).

[0144] [others] • Coconut fatty acid: Product name "Coconut Fatty Acid," manufactured by NOF Corporation. • Sokalan HP20: Ethylene oxide adduct of polyethyleneimine. Trademark name "Sokalan(registered trademark) HP20", manufactured by BASF. • Dichrosan: 4,4'-dichloro-2-hydroxydiphenyl ether, trade name "TINOSAN(registered trademark) HP100", manufactured by BASF. • PEG1000: Polyethylene glycol, trade name "PEG#1000-L60" (weight-average molecular weight = 1,000), manufactured by Lion Corporation. Solfit: 3-Methoxy-3-methylbutanol, trade name "Solfit (registered trademark)", manufactured by Kuraray Co., Ltd. • Ethanol: Product name "Specific Alcohol 95% Synthetic," manufactured by Nippon Alcohol Sales Co., Ltd. • Sodium lactate: Product name "Sodium lactate", manufactured by Musashino Chemical Research Institute Co., Ltd. • pTs-H: p-toluenesulfonic acid, trade name "PTS acid", manufactured by Meiyu Sangyo Co., Ltd. • MEA: MEA (monoethanolamine), manufactured by Nippon Shokubai Co., Ltd. • Citric acid: Product name "Liquid Citric Acid," manufactured by Fuso Gaku Kogyo Co., Ltd. • Enzyme: Enzyme liquid preparation, product name "Medley Core 210L", manufactured by Novozymes. • Fragrance: Product name "Aquatic Powdery," manufactured by Givaudan Japan Co., Ltd. • Pigment: Product name "Liquitint SeaGreenCC", manufactured by Milliken Japan LLC. Water: Distilled water.

[0145] <Examples 1-18, Comparative Examples 1-7> 1,000 g of each example liquid detergent composition was prepared according to the formulations (unit: mass%) shown in Tables 1-3. The breakdown of common components in Tables 1-3 is shown in Table 4. However, the amount of MEA used as a pH adjusting agent is the appropriate amount necessary to make p = 7. Table 4 shows the average amount used, which is 2.5 mass%. 1,000 g of each example liquid detergent composition was prepared according to the following procedure.

[0146] A portion of the water and the components shown in Tables 1-3 were placed in a 1L beaker and thoroughly stirred with a magnetic stirrer (Fine, F-606N). After stirring, an appropriate amount of pH adjuster was added as needed so that the pH at 25°C matched the values ​​in Tables 1-3. Then, water was added until the total volume reached 100% by mass, and the mixture was stirred well again to obtain a liquid detergent composition.

[0147] The pH (at 25°C) of the liquid detergent composition was measured by adjusting the temperature of the liquid detergent composition to 25°C and using a glass electrode pH meter (HM-30G, manufactured by Toa DKK Co., Ltd.). The glass electrode was directly immersed in the liquid detergent composition, and the pH was measured after 1 minute. The measurement method was carried out in accordance with JIS Z 8802:1984 "Method for measuring pH".

[0148] <Fade-resistant effect> The colorfastness-inhibiting effect of the liquid detergent compositions obtained in each example was evaluated using the following evaluation method. The results are shown in Tables 1-3.

[0149] [Evaluation Method] The liquid detergent composition (8.3g for Examples 1-7 and 11-18, 8.3g for Comparative Examples 1-7, 6g for Example 8, 21g for Example 9, and 33g for Example 10), 25L of water, and 1.25kg of the evaluation fabric (black T-shirt or EMPA277 as described below) were placed in a washing machine, and the evaluation fabric was washed 10 times according to the washing conditions described below. Afterwards, it was dried by natural drying.

[0150] The amount of liquid detergent composition used in each example was not uniform, but varied according to the activator concentration of the detergent composition in each example. The evaluation cloth (black T-shirt or EMPA277) was used as the reference evaluation cloth, after being washed and dried, except that the liquid detergent composition of Comparative Example 1 was used in place of the liquid detergent composition of each example.

[0151] • Evaluation fabric (black T-shirt): GU Soft Cotton Crew Neck T-shirt (long sleeves), item number 336119. • Evaluation fabric (EMPA277): Purchased from Swissatest, Cotton Jeans fabric with indigo dyeing. • Washing conditions: Toshiba top-loading washing machine NA-VX7600L, 10-minute wash cycle, 2 rinse cycles, 6-minute spin cycle.

[0152] [Scoring Criteria] Ten expert panelists performed paired comparisons of each example of evaluation fabric washed with the liquid detergent composition against a standard evaluation fabric, using Scheffe's paired comparison method, and scored them according to the scoring criteria below. When comparing the evaluation fabric in each example with the standard evaluation fabric, if there is a clear difference in "lack of fading," the evaluation fabric that does not fade will be given +2 points, and the evaluation fabric that does fade will be given -2 points. When comparing the evaluation fabric for each example with the standard evaluation fabric, if there is a slight difference in "lack of fading," the evaluation fabric with slightly less fading will be given +1 point, and the evaluation fabric with slightly more fading will be given -1 point. If no difference is found in "fade resistance" when comparing the evaluation fabric for each example with the standard evaluation fabric, both will be given a score of 0.

[0153] [Evaluation Criteria] The total scores from the 10 expert panelists were calculated, and the color fading prevention effect of each example was evaluated based on the following evaluation criteria. ◎: The total score of the 10 people was between 10 and 20 points. ○: The total score of the 10 people was between 6 and 9 points. △: The total score of the 10 people was between 1 and 5 points. ×: The total score of the 10 people was 0 or less.

[0154] <Low-temperature stability evaluation test> Each example of the liquid detergent composition was filled and sealed into a glass container (PS11 bottle) and stored at -5°C for one month. The appearance of the liquid detergent composition after storage was visually inspected and evaluated according to the evaluation criteria below. The results are shown in Tables 1-3.

[0155] [Evaluation Criteria] ○: No precipitation, phase separation, or deterioration of fluidity. △: Slight precipitation, phase separation, and deterioration of fluidity are observed. ×: Significant precipitation, phase separation, and deterioration of fluidity are present.

[0156] [Table 1]

[0157] [Table 2]

[0158] [Table 3]

[0159] [Table 4]

[0160] As shown in Tables 1 and 2, the liquid detergent compositions of the examples exhibited excellent color fading suppression and achieved practically acceptable low-temperature stability. In contrast, as shown in Table 3, the liquid detergent compositions of the comparative examples were inferior in either color fading suppression or low-temperature stability.

Claims

1. Component (A) consists of component (A1) and component (A2), A liquid detergent composition containing at least one component (B) selected from component (B1), component (B2), and component (B3), The aforementioned component (A1) is a nonionic surfactant, The aforementioned component (A2) is a non-soap-based anionic surfactant, The aforementioned component (B1) is an aliphatic monohydric alcohol having 18 to 26 carbon atoms. The aforementioned component (B2) is a monoglyceride or diglyceride, which is an ester consisting of one or two linear fatty acids having 12 to 26 carbon atoms and glycerol. The aforementioned (B3) component is a fatty acid ester having 20 to 38 carbon atoms, comprising a fatty acid and an aliphatic monohydric alcohol, and is a fatty acid ester comprising a fatty acid having a carboxyl group at the end of a linear alkyl chain having 12 to 26 carbon atoms and a monohydric alcohol, or a fatty acid ester comprising a monohydric alcohol having a hydroxyl group at the end of a linear alkyl chain having 12 to 26 carbon atoms and a fatty acid. The content of component (A) is 15 to 55% by mass relative to the total mass of the liquid detergent composition. The content of component (B) is 0.01 to 3% by mass relative to the total mass of the liquid detergent composition. A liquid detergent composition in which the ratio of the mass of component (A1) to the mass of component (A2) [(A1) / (A2)] is 1.5 to 8.

2. The above component (A2) includes a linear alkylbenzene sulfonic acid or a salt thereof, The liquid detergent composition according to claim 1, wherein the content of the linear alkylbenzene sulfonic acid or a salt thereof is 3% by mass or more with respect to the total mass of the liquid detergent composition.

3. Furthermore, it contains component (C), The liquid detergent composition according to claim 1 or 2, wherein component (C) is a water-soluble polymer having at least one unit selected from the group consisting of alkylene terephthalate units and alkylene isophthalate units, and at least one unit selected from the group consisting of oxyalkylene units and polyoxyalkylene units.

Images