TWI598437B - Liquid detergent - Google Patents

Description

Liquid detergent Field of invention

This invention relates to a liquid detergent.

The present application claims priority based on Japanese Patent Application No. 2012-210777, filed on Sep. 25, 2012, filed in

Background of the invention

Conventionally, as a liquid detergent for use in a fiber product or the like, a nonionic surfactant is mainly used as a main component, and a nonionic surfactant and an anionic surfactant are used in combination.

In recent years, in order to save resources and reduce environmental load (reduction of waste), efforts have been made to miniaturize the detergent container, and it is required to concentrate the liquid detergent (high concentration of the surfactant).

The more the liquid detergent is concentrated, the lower the liquid stability of the liquid detergent and the easier formation of a film or gelation. Once the liquid detergent forms a film or gelatinizes, it is difficult to pour out the liquid detergent from the container or to impair the dispersibility in the water and the permeability to the object to be washed. Attempts have been made to prevent liquid detergents from forming a film and gel.

For example, Patent Document 1 proposes, for example, a specific one A liquid detergent composition of an alkylene oxide adduct, a guanamine-amine compound, and an anionic surfactant.

Further, a technique generally known in the art is to inhibit the formation of a film and gelation of a liquid detergent by adding ethanol or tetracaine.

Prior technical literature

Patent literature

Patent Document 1: JP-A-2009-144002

Summary of invention

However, a liquid detergent containing ethanol, for example, once poured out of a container and placed under an open system, is liable to cause film formation or gelation due to evaporation of moisture or solvent by drying. The butyl carbitol has a characteristic odor, so that its odor tends to adhere to the laundry or to detract from the odor of the flavoring agent that is incorporated into the liquid detergent. Therefore, the addition of these to liquid detergents to inhibit film formation or gelation is still accompanied by practical difficulties.

The present invention has been made in view of the above technical background, and an object thereof is to provide a liquid detergent which is excellent in preventing formation and gelation of a film and having good odor.

The liquid detergent of the present invention has the following aspects (1) to (12).

(1) Containing: (A) component: 30% by mass or more of a nonionic surfactant; (B) Component: an anionic surfactant selected from one or more of a sulfonate or a sulfate salt; and (C) component : an organic solvent represented by the following formula (I); and the mass ratio represented by the component (C) / the component (A) is 0.04 to 0.5;

In the formula (I), R ¹ to R ³ each independently represent a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, and R ⁴ is a hydrogen atom or an ethylene group.

(2) In the liquid detergent according to (1), the component (C) is one or three of the above R ¹ to R ³ and is a hydrogen atom.

(3) In the liquid detergent according to (1) or (2), the component (C) is one of the above R ¹ to R ³ and is an alkyl group.

(4) The liquid detergent according to (3) above, wherein the component (C) is a carbon number of the alkyl group of 1 or 2.

(5) In the above (1) to (4) according to any one of the liquid detergent in the component (C) based R ⁴ is the hydrogen atom.

(6) The liquid detergent according to any one of (1) to (5), wherein the component (C) is 3-methoxybutanol or a derivative thereof.

(7) The liquid detergent according to (6) above, wherein the component (C) is 3-methoxy-3-methylbutanol.

(8) The liquid detergent according to any one of (1) to (6) above, wherein the content of the component (C) in the liquid detergent is from 1 to 20 with respect to the entire mass of the liquid detergent. quality%.

(9) In the liquid detergent according to any one of the above (1) to (8), The component (B) is selected from the group consisting of a linear alkylbenzenesulfonic acid or a salt thereof, an alkane sulfonate, a polyoxyalkylene ether sulfate salt, and an α-olefin sulfonate. At least one substance.

(10) The liquid detergent according to any one of (1) to (9), wherein the component (A) is a compound represented by the following formula (a1): R ¹¹ -X-[(EO) _s /(PO) _t ]-R ¹² ...(a1)

(R ¹¹ : a hydrocarbon group having 8 to 18 carbon atoms, X: O, COO or CONH, R ¹² : a hydrogen atom, an alkyl group having 1 to 6 carbon atoms or an alkenyl group having 2 to 6 carbon atoms, []: a repeating structure, EO: oxygen extended ethyl, PO: oxygen extended propyl, s: average repeat number of EO, t: average repeat number of PO, s=3~20, t=0~6).

(11) The liquid detergent according to any one of (1) to (9), wherein the component (A) is a compound represented by the following formula (a2): R ¹³ -O-[(EO) _p /(PO) _q ]-(EO) _r -H...(a2)

(R ¹³ : a hydrocarbon group having 8 to 18 carbon atoms, []: repeating structure, EO: oxygen extended ethyl group, PO: oxygen extended propyl group, p: average repeat number of EO, q: average repeat number of PO, r: The average number of repetitions of EO, p>1, r>1, 0<q≦3, and p+r=10~20).

According to the liquid detergent of the present invention, film formation and gelation are well prevented and the odor is good.

Form for implementing the invention

The embodiments are shown below and described in detail.

(liquid detergent)

The liquid detergent according to the present embodiment contains: (A) component: a nonionic surfactant; (B) component: an anionic surfactant selected from one or more of a sulfonate or a sulfate salt; and (C) Ingredients: Specific organic solvents.

The viscosity of the liquid detergent of the present embodiment is not particularly limited, and is preferably, for example, 30 to 300 mPa·s. When the viscosity is at most the above upper limit value, the permeability to the fiber product or the like of the object to be washed can be improved during the application of the coating.

The value of the above viscosity is the value measured at 25 °C. Even if it is a viscosity outside the range specified in the present specification, the viscosity in the range specified in the present specification when it is corrected to a viscosity at 25 ° C is considered to be included in the scope of the present invention.

The viscosity of the liquid detergent can be measured by using a thin tube viscometer or a rotary viscometer, and it is particularly preferable to use a rotary viscometer for measurement. It is also preferable to use a B type viscometer for the measurement of the rotary viscometer. In the present embodiment, for example, a value measured by a B-type viscometer (manufactured by TOKIMEC Co., Ltd.) (measurement conditions: rotor No. 2, number of revolutions of 30 rpm, and value after 10 rotation) can be used.

The pH of the liquid detergent of the present embodiment is preferably 4 to 9. When the pH of the liquid detergent is within the range of 4 to 9 above, the coating detergency can be improved. The pH of the liquid detergent is preferably from 6 to 9, and has the advantage of good liquid appearance stability in this range.

The above pH value is a value measured at 25 °C. Even in this manual The pH outside the range specified in the above is considered to be included in the range of the present invention as long as it is adjusted to a pH at 25 ° C in the range specified in the present specification.

The pH of the liquid detergent can be measured by using a test paper, a test solution, or another measuring means of an electrical pH measuring device (pH meter or the like) as appropriate. In the present embodiment, for example, a value measured by a pH meter (HM-30G, manufactured by Toa DKK Co., Ltd.) or the like can be used.

<(A) component: nonionic surfactant>

The component (A) is a nonionic surfactant. The component (A) is used to impart a detergency to a liquid detergent.

A nonionic surfactant (also sometimes referred to as a nonionic surfactant, a nonionic surfactant, a nonionic surfactant, a nonionic surfactant, a nonionic surfactant, etc.) means that even if dissolved The surfactant is still not showing ionicity in water. The nonionic surfactant used in the component (A) may, for example, be an alkylene oxide addition of a fatty acid alkyl ester, a higher alcohol, an alkylphenol, a higher fatty acid, a higher fatty acid alkyl ester or a higher amine. , polyoxy-extension ethyl polyoxypropyl propyl block copolymer, fatty acid alkanolamine, fatty acid alkanolamine, polyol fatty acid ester or its alkylene oxide adduct, polyol fatty acid ether, alkyl oxide An amine, an oxyalkylene amine, an alkylene oxide adduct of a hardened castor oil, a sugar fatty acid ester, an N-alkyl polyhydroxy fatty acid decylamine or an alkyl glucoside.

In addition, the component (A) will be described later as a polyoxyalkylene type nonionic surfactant represented by the formula (a1) (hereinafter sometimes referred to as a component (a1)) or a formula (a2) described later. Polyoxyalkylene type nonionic surfactant (The following may be referred to as (a2) component). These (A) components may be used alone or in combination of two or more.

The content of the component (A) in the liquid detergent of the present embodiment is preferably 30% by mass or more, and preferably 30 to 70% by mass, based on the total mass of the liquid detergent. When the content of the component (A) is 30% by mass or more based on the total mass of the liquid detergent, the sufficient detergency can be exhibited. In other words, in the present embodiment, by containing the components (B) and (C) described later, it is difficult to cause film formation and gelation even if the concentration of the component (A) is increased, so that it can be made into a liquid detergent. (A) A liquid detergent having a high detergency per component of 30% by mass or more. In addition, when the component (A) in the liquid detergent is 70% by mass or less, it is difficult to cause film formation and gelation.

Further, the content of the component (A) is preferably from 30 to 60% by mass based on the total mass of the liquid detergent, and has an advantage that sufficient detergency can be exhibited in this range. The content of the component (A) is preferably 40 to 50% by mass based on the total mass of the liquid detergent, and has an advantage of preventing film formation and gelation within this range.

<(a1) component>

In the present embodiment, as the component (a1), a compound represented by the following chemical formula can be used.

R ¹¹ -X-[(EO) _s /(PO) _t ]-R ¹² ...(a1)

(In the formula (a1), R ¹¹ is a hydrocarbon group having 8 to 18 carbon atoms. X is O, COO or CONH. R ¹² is a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or a carbon number of 2 to 6 Alkenyl. [] represents a repeating structure, [(EO) _s /(PO) _t ] represents that the structure of the compound of the component (a1) has a structure of repeating EO or PO in []. Here, EO represents an oxygen-extended ethyl group. PO represents an oxygen-extended propyl group. Each compound may have only one of EO and PO in a repeating structure, or may be mixed with each other. When each compound has EO and PO mixed, EO and PO may be arranged in any order. s represents the average number of repetitions of EO and is selected from the number of 3 to 20. t represents the average number of repetitions of PO and is selected from the number of 0 to 6. Here, the average number of repetitions means that each molecule is produced in the above compound. The number of EO or PO (repeated number) in the equation will cause a difference, so the average value of the number of repetitions per molecule is referred to as the average number of repetitions. The average number of repetitions can be roughly compared with the above (a2). The molar ratio of EO or PO added to the component 1 is regarded as the average repeating number. When the average repeat number is to be strictly calculated, the sample may be used in the gas phase with respect to a certain number of moles. Precipitation method and other molecular weight distribution is obtained, to calculate the average number of repeating of projections from the molecular weight.)

In the formula (a1), the carbon number of R ¹¹ is preferably from 10 to 18 from the viewpoint of improvement in detergency.

R ^{11 is} preferably an alkyl group or an alkenyl group, and may be a straight chain or a branched chain.

As R ¹¹ , a raw material such as a higher alcohol, a higher fatty acid or a higher fatty acid decylamine of the first or second stage can be used, for example, an alkyl group or an alkenyl group derived from the above. Here, the higher alcohol, the higher fatty acid, the higher fatty acid guanamine or the like is a higher alcohol, a higher fatty acid or a higher fatty acid decylamine having a carbon number of 5 or more on a substantially basic basis.

When R ¹² is an alkyl group, the carbon number of R ¹² is preferably from 1 to 3.

When R ¹² is an alkenyl group, the carbon number of R ¹² is preferably 2 to 3.

X is preferably O or COO.

In the formula (a1), when X is O, the component (A) is an alkyl ether type nonionic interface Sex agent.

When X is O, R ^{11 is} preferably an alkyl group having 10 to 18 carbon atoms or an alkenyl group having 10 to 18 carbon atoms. When the compound represented by (a1) is used, the detergency of the liquid detergent can be improved. When X is O, R ¹¹ may have an unsaturated bond. When X is O, R ¹² is preferably a hydrogen atom.

In the formula (a1), when X is COO, the component (A) is a fatty acid ester type nonionic surfactant. When X is COO, the carbon number of R ¹¹ is preferably 9-18. When the compound represented by (a1) is used, the detergency of the liquid detergent can be improved. Further, the carbon number of R ¹¹ is preferably from 11 to 18, and in this range, it has an advantage of excellent appearance stability. R ¹¹ may have an unsaturated bond. When X is COO, R ¹² is preferably an alkyl group having 1 to 3 carbon atoms.

In the formula (a1), s is the number of 3 to 20. When s exceeds 20, the liquid is washed. The HLB value of the agent (the affinity between the aqueous layer of the surfactant and the hydrophobic layer) tends to be too high to lower the detergency. When s is less than 3, the raw material odor of the component (A) itself tends to be easily deteriorated. In addition, s is preferably 5~18.

t is the number of 0~6. When t exceeds 6, the storage stability of the liquid detergent at a high temperature tends to decrease. In addition, t is preferably 0 to 3.

EO and PO can be mixed in the arrangement, and EO and PO in (EO) _s /(PO) _t can be irregular in the arrangement, so-called random arrangement. Further, EO and PO may be individually formed into a plurality of blocks and the blocks thereof may be arranged in a so-called block-like arrangement.

In the component (a1), the addition molar distribution of EO or PO is not particularly limited, and it is likely to vary depending on the reaction method in the case of producing the component (a1). Here, the addition molar number indicates an addition base relative to the raw material 1 mole (addition to formation) The base of the compound, here the molar number of EO or PO). The average addition molar number per molecule of the molar number of moles per compound, when the compound is added, the ratio of the mole number of the addition group to the compound 1 molar addition is roughly regarded as the average addition. Moll number. When the average addition molar number requires a strict value, the molecular weight per molecule contained in the compound having a certain molar number can be determined by chromatography, and the molar number per mole of the molecule is estimated from the molecular weight, and the value is obtained. Average it to calculate. The addition molar number distribution is a distribution of the number of addition moles per molecule contained in a certain amount of the compound, but in the present embodiment, the following narrow ratio is used as an index. The molecular weight per molecule contained in a compound having a certain molar number is determined by chromatography or the like, and the addition molar number is estimated. The molar addition mole number of the addition compound having the most molecular weight in the total compound is "nlmax". The addition molar number of the addition base is (nlmax-1), nlmax, and (nlmax+1), and the total mass (nlmax-1~1) is calculated. The ratio of "nlmax-1~1" to the mass of all molecules in the compound is taken as the narrow ratio.

For example, when a general alkaline catalyst such as sodium hydroxide or potassium hydroxide is used, ethylene oxide or propylene oxide is added to a raw material (higher alcohol, higher fatty acid, higher fatty acid decylamine, etc. of the first or second grade). The addition of EO or PO has a tendency to exhibit a wider distribution.

For example, oxidation of metal ions such as Al ³⁺ , Ga ³⁺ , In ³⁺ , Tl ³⁺ , Co ³⁺ , Sc ³⁺ , La ³⁺ , Mn ²⁺ described in Japanese Patent Publication No. 6-15038 is used. When a specific alkoxylation catalyst such as magnesium is added to ethylene oxide or propylene oxide to a raw material, the molar distribution of EO or PO tends to be narrowly distributed.

The liquid detergent has a narrow distribution of the molar number (strain), that is, a narrow liquidity, and has a stable liquid detergent chemical property, and has a strong detergency against a specific compound. On the other hand, in the case where the addition molar number distribution is wide (widely distributed), that is, the narrowness ratio is small, since the liquid detergent contains a compound having various chemical characteristics, various dirt can be washed. Therefore, the addition of the molar distribution should be designed for the purpose of liquid detergent.

Further specific examples of the component (a1) are shown. It can be mentioned as follows: Diadol (trade name; C13 (C indicates carbon number and below)) manufactured by Mitsubishi Chemical Corporation, Neodol (trade name; mixture of C12 and C13) manufactured by Shell, or Safol23 (trade name) manufactured by Sasol ; a mixture of C12 and C13), an alcohol equivalent of 1 mole, an addition equivalent to 12 moles or equivalent to 15 moles of ethylene oxide; relative to Procter & Gamble's CO-1214 or CO-1270 (trade name) a natural alcohol 1 mol, an addition equivalent to 12 moles or equivalent to 15 moles of ethylene oxide; relative to the C12 olefin obtained by trimerization of butene is obtained by the oxygen method 1 molar of C13 alcohol, addition equivalent to 7 moles of ethylene oxide (trade name: Lutensol TO7; manufactured by BASF); relative to C10 alcohol 1 mole obtained by supplying pentanol to Guerbet reaction, The addition is equivalent to 9 moles of ethylene oxide (trade name: Lutensol XP90; manufactured by BASF Corporation); the molar ratio of C10 alcohol 1 mole obtained by supplying pentanol to Guerbet reaction is equivalent to 7 moles. Ethylene oxide (trade name: Lutensol XL70; manufactured by BASF Corporation); addition phase of C10 alcohol 1 mol relative to the supply of pentanol to Guerbet reaction When it is 6 moles of ethylene oxide (trade name: Lutensol XA60; manufactured by BASF); relative to the carbon number 12 to 14 of the second alcohol 1 mole, the addition is equivalent to 9 moles or equivalent to 15 Moer's ethylene oxide (trade name: SOFTANOL 90; SOFTANOL 150, Co., Ltd. Japan Catalyst); relative to coconut fatty acid methyl ester (lauric acid / myristic acid = 8/2) 1 mole, using alkoxylated catalyst additive equivalent to 15 Mo The ethylene oxide of the ear (polyoxyethylidene coconut fatty acid methyl ester (EO15 Mo)) and the like.

In particular, when the viewpoint of the improvement of the detergency of the liquid detergent is emphasized, the component (a1) is preferably used as the component (A).

<(a2) component>

In the present embodiment, as the component (a2), a compound represented by the following chemical formula can be used.

R ¹³ -O-[(EO) _p /(PO) _q ]-(EO) _r -H...(a2)

(In the formula (a2), R ¹³ is a hydrocarbon group having 8 to 18 carbon atoms. [] represents a repeating structure, and [(EO) _s /(PO) _t ] represents that the compound structure of the (a1) component has a repeating EO in [] Or a structure of PO. Here, EO represents an oxygen-extended ethyl group, and PO represents an oxygen-extended propyl group. Each compound may have only one of EO and PO in a repeating structure, or may be mixed with each other. Each compound has EO. When PO is mixed, EO and PO can be arranged in any order. p represents the average number of repetitions of EO in the repeating structure, q represents the average number of repetitions of PO in the repeating structure, and r represents the average number of repetitions of EO outside the repeating structure, p The q and r systems respectively satisfy p>1, r>1, 0<q≦3, and p+r=10~20.

In the formula (a2), R ^{13 is} preferably an alkyl group or an alkenyl group. R ¹³ may be straight or branched.

In the formula (a2), the ratio of EO to PO is expressed by q/(p+r) and preferably 0.1 to 0.5. The ratio represented by q/(p+r) is not less than the above 0.1 value, whereby the foaming is not excessively foamed, and the foaming can be optimized. By the above 0.5 value, the capacity Easy to obtain a moderate viscosity, can better inhibit gelation. The ratio of EO to PO is preferably from 0.1 to 0.3.

EO and PO can be mixed in the arrangement, and EO and PO in (EO) _p /(PO) _q can be irregular in the arrangement, so-called random addition. Further, EO and PO may be individually formed into a plurality of blocks and the blocks thereof may be arranged in a so-called block-like addition.

The component (a2) can be produced by a known method. For example, after sequentially adding ethylene oxide or propylene oxide to an alcohol having R ¹³ derived from natural fats and oils, or adding and adding ethylene oxide and propylene oxide (random addition) The (a2) component can be produced by adding ethylene oxide again.

When the component (a2) is used as the component (A), the liquid detergent can be easily changed to an appropriate viscosity, and the gelation can be suppressed relatively well. Further, the foaming property can be improved, and the biodegradability is also improved.

<(B) component: one or more anionic surfactants selected from a sulfonate or a sulfate salt>

The component (B) contained in the liquid detergent of the present embodiment is selected from the group consisting of one or more anionic surfactants of a component: a sulfonate or a sulfate salt. The liquid detergent can prevent film formation and gelation by containing the component (B).

An anionic surfactant (sometimes referred to as an anionic surfactant, an anionic surfactant, an anionic surfactant, an anionic surfactant, an anionic surfactant, etc.) is an anionic substance dissolved in water. a surfactant and an anionic hydrophilic group.

As the anionic surfactant to be used in the component (B), for example, a linear alkylbenzenesulfonic acid or a salt thereof; an α-olefinsulfonate; a linear chain or a branch is preferable. An alkyl sulphate salt; an alkyl ether sulphate salt or an alkenyl ether sulphate salt; an alkyl alkane sulfonate; or an α-sulfo fatty acid ester salt. The ester of a sulfuric acid or a sulfo fatty acid of the above compound means that a sulfate group or a fatty acid group of the compound forms a salt with a metal or an amine. The salt in the non-soap anionic surfactant may, for example, be an alkali metal salt such as sodium or potassium, an alkaline earth metal salt such as magnesium, or an alkanolamine salt such as monoethanolamine or diethanolamine.

The linear alkylbenzenesulfonic acid or a salt thereof is preferably a linear alkyl group having 8 to 16 carbon atoms, and particularly preferably having a carbon number of 10 to 14.

As the α-olefin sulfonate, those having a carbon number of 10 to 20 are preferred. As the alkyl sulfate salt, those having an alkyl group having a carbon number of 10 to 20 are preferred.

The alkyl ether sulfate salt or the alkenyl ether sulfate salt used in the component (B) may have a linear or branched alkyl group having 10 to 20 carbon atoms or a linear or branched carbon group having 10 to 20 carbon atoms. Alkenyl chain. Further, it may be one having an oxygen-extended ethyl group or an oxygen-extended polypropylene group.

The alkanesulfonate is preferably one having 10 to 20 carbon atoms and preferably 14 to 17. Among them, those in which the aforementioned alkyl group is a 2-stage alkyl group (i.e., a 2-stage alkanesulfonate) are particularly preferred.

As the α-sulfofatty acid ester salt, those having a fatty acid residue of 10 to 20 are preferred.

In the above, the component (B) is particularly preferably selected from the group consisting of linear alkylbenzenesulfonic acid or a salt thereof, an alkanesulfonate, a polyoxyethylidene ether sulfate salt, and an α-olefinsulfonate. At least one compound. In particular, when the linear component alkylbenzenesulfonic acid or its salt is used as the component (B), the stability is high and the odor is suppressed, and in particular, the effect of increasing the stability is high. By using polyoxyethylene ethyl ether ether sulfate in component (B) Salt, high stability and can suppress odor, especially the effect of suppressing odor.

As the component (B), other non-soap anionic surfactants other than the above may be used. Examples of the other non-soap anionic surfactants include alkyl ether carboxylates, polyoxyalkylene carboxylates, alkyl (or alkenyl) guanamine ether carboxylates, and mercapto groups. a carboxylic acid type anionic surfactant such as an aminocarboxylate; and an alkyl phosphate salt, a polyoxyalkylene alkyl phosphate salt, a polyoxyalkylene alkylphenyl phosphate or a glycerin fatty acid ester Phosphate type anionic surfactant such as phosphate ester salt.

These (B) ingredients are easy to start in the market.

These (B) components may be used alone or in combination of two or more.

The content of the component (B) in the liquid detergent of the present embodiment is preferably from 1 to 20% by mass based on the total mass of the liquid detergent. The content of the component (B) is preferably in the range of 1 to 20% by weight, that is, it is easier to prevent the formation and gelation of the film of the liquid detergent, and the low-temperature stability of the liquid detergent can be improved. The content of the component (B) is preferably 2 to 10% by mass, and in this range, film formation prevention, gelation, and low-temperature stability can be simultaneously established at a high level. The content of the component (B) is preferably from 3 to 8% by mass.

In the liquid detergent of the present embodiment, the mass ratio (hereinafter sometimes referred to as A/B ratio) represented by the component (A)/component (B) is preferably 3 to 50. When the A/B ratio is 3 or more, the film formation and gelation can be favorably prevented. If the ratio is 50 or less, it is difficult to damage the odor after washing the object. The A/B ratio is preferably 5 to 20. In addition, the A/B ratio is better than 7-15.

<(C) component: specific organic solvent>

The component (C) contained in the liquid detergent of the present embodiment is an organic solvent represented by the following formula (I). When the liquid detergent of the present embodiment contains the component (C), the film formation and gelation can be favorably prevented, and the odor can be improved.

More specifically, the volatility of the component (C) is low. Therefore, the liquid detergent contains the component (C), and even if it is placed under an open system, film formation and gelation are less likely to occur. Further, by including the component (C) in the liquid detergent, it is difficult to impair the aroma of the flavoring agent blended in the liquid detergent. Further, even if the liquid detergent contains the component (C), it is difficult to leave the odor of the component (C) on the laundry.

In the formula (I), R ¹ to R ³ each independently represent a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, and R ⁴ is a hydrogen atom or an ethylidene group.

In the formula (I), all of R ¹ to R ³ are a hydrogen atom or one is an alkyl group and the other two are hydrogen atoms, that is, two or three (two or more and at least two) in R ¹ to R ³ ) is preferably a hydrogen atom. As long as two or three of R ¹ to R ³ are hydrogen atoms, even if they are placed in an open system, film formation and gelation can be prevented relatively well.

When any of R ¹ to R ³ is an alkyl group, the alkyl group preferably has 1 to 2 carbon atoms, and preferably 1 is used. When the carbon number of R ¹ to R ³ is within the above range, even if it is placed in an open system, film formation and gelation can be prevented relatively well.

R ⁴ is preferably a hydrogen atom from the viewpoint of better prevention of film formation and gelation even when placed in an open system.

The (C) component may, for example, be 3-methoxybutanol, 3-methoxy-3-methylbutanol, 3-methoxy-3-ethylbutanol or 3-methoxy-3-propylbutyrate. Alcohol, 3-methoxy-2-methylbutanol, 3-methoxy-2-ethylbutanol, 3-methoxy-2-butanol, 3-methoxy-1-methylbutanol, 3-methoxy-1-ethylbutanol or 3-methoxy-1-butanol, etc. wherein R ⁴ in the formula (I) is a hydrogen atom; and such as 3-methoxybutyl acetate, 3 -methoxy-3-methylbutyl acetate, 3-methoxy-3-ethylbutyl acetate, 3-methoxy-3-propylbutyl acetate, 3-methoxy-2 -methylbutyl acetate, 3-methoxy-2-ethylbutyl acetate, 3-methoxy-2-propylbutyl acetate, 3-methoxy-1-methylbutyl Acetate, 3-methoxy-1-ethylbutyl acetate, 3-methoxy-1-propylbutyl acetate, etc., wherein R ⁴ in the formula (I) is an acetamidine group or the like.

Among them, as (C) component, 3-methoxybutanol, 3-methoxy-3-methylbutanol, 3-methoxy-2-methylbutanol, 3-methoxy-1-methylbutyl Alcohol or 3-methoxy-3-methylbutyl acetate is preferred. Further, as the component (C), 3-methoxy-3-methylbutanol is preferred.

These (C) components may be used alone or in combination of two or more.

The content of the component (C) in the liquid detergent of the present embodiment is preferably from 1 to 20% by mass based on the total mass of the liquid detergent. When the content of the component (C) is at least 1% by mass or more, that is, it is easier to prevent the formation and gelation of the film of the liquid detergent, and the low-temperature stability of the liquid detergent can be improved. When the content of the component (C) is 20% by mass or less, the odor of the component (C) is less likely to be transferred to the laundry, and it is less likely to impair the odor of the liquid detergent itself. (C) into The content of the fraction is preferably 2 to 15% by mass. The content of the component (C) is preferably from 3 to 10% by mass.

Further, the component (C) is preferably used in combination with a water-miscible organic solvent (C') other than the component (C), and it is preferably used in combination with ethanol. When (C) + (C') &lt; 5, (C) / (C') is preferably 4 or more. Further, when 5 ≦ (C) + (C'), (C) / (C') is preferably 0.5 to 10, and preferably 1 to 4. By preventing the formation of odor and film by the above range.

In the liquid detergent of the present embodiment, the mass ratio (hereinafter sometimes referred to as C/A ratio) expressed by the component (C)/(A) is 0.04 to 0.5. When the C/A ratio is less than 0.04, the film formation and gelation of the liquid detergent cannot be satisfactorily prevented; and if the value exceeds 0.5, the odor of the liquid detergent is likely to be impaired. The C/A ratio is preferably 0.04 to 0.3. The C/A ratio is preferably from 0.04 to 0.18.

The liquid detergent of the present embodiment contains water as a solvent for dispersing the components (A) to (C) described above and optional components described later. The water content in the liquid detergent is preferably, for example, 10 to 70% by mass based on the total mass of the liquid detergent, and preferably 20 to 40% by mass.

<arbitrary component>

The liquid detergent of the present embodiment may contain any components other than the components (A) to (C) as needed. Examples of the optional component include surfactants (arbitrary surfactants) other than the components (A) to (B), thickeners, solubilizers, metal ion chelating agents, antioxidants, texture enhancers, and fluorescent agents. Brightener, second-degree pollution preventive, enzyme, flavoring agent, coloring agent, opacifying agent, quenching substance, pH adjuster, pearlizing agent or detergent.

Cationic interfacial activity Agent, amphoteric surfactant or higher fatty acid salt.

A cationic surfactant (sometimes referred to as a cationic surfactant, a cationic surfactant, a cationic surfactant, a cationic surfactant, or a cationic surfactant) is cationic when dissolved in water. A surfactant having a cationic hydrophilic group. The cationic surfactant may, for example, be a cationic surfactant such as an alkyltrimethylammonium salt, a dialkyldimethylammonium salt, an alkylbenzyldimethylammonium salt or an alkylpyridine cation salt. In the liquid detergent, the content of the cationic surfactant is preferably from 0.1 to 8.0% by mass based on the total mass of the liquid detergent.

The amphoteric surfactant is one which dissolves in water, that is, a positive or negative charge as a whole due to the pH of the water, for example, a hydrophilic group having both an anion and a cation. Examples of the amphoteric surfactant include an alkyl inner salt type, an alkyl guanamine inner salt type, an imidazoline type, an alkylamine sulfonic acid type, an alkylamine carboxylic acid type, an alkyl decyl carboxylic acid type, and an anthracene. An amine-amine acid type or a phosphoric acid type amphoteric surfactant. In the liquid detergent, the amphoteric surfactant content is preferably 0.05 to 5.0% by mass based on the total mass of the liquid detergent.

The higher fatty acid salt may, for example, be a higher fatty acid salt having 10 to 20 carbon atoms. In the liquid detergent, the content of the higher fatty acid salt is preferably 0.01 to 5% by mass based on the total mass of the liquid detergent. When the content of the higher fatty acid salt is 0.01% by mass or more, the defoaming property at the time of washing can be improved. When the content is more than 5% by mass, the film formation and gelation of the liquid detergent tend to occur.

As the thickener or solubilizing agent, for example, toluenesulfonic acid, xylenesulfonic acid, cumenesulfonic acid, substituted or unsubstituted naphthalenesulfonic acid, toluenesulfonic acid Salt, xylene sulfonate, cumene sulfonate, or substituted or unsubstituted naphthalene sulfonate. The salt may, for example, be a sodium salt, a potassium salt, a calcium salt, a magnesium salt, an ammonium salt or an alkanolamine salt.

One type of the thickener or the solubilizer may be used alone or two or more types may be used in combination.

In the liquid detergent of the present embodiment, the content of the thickener or the solubilizing agent is preferably 0.01 to 15% by mass based on the total mass of the liquid detergent. If it is in the above range, the formation of a film of the liquid detergent can be prevented.

As the alkaline agent, an alkanolamine can be mentioned. The alkanolamine may, for example, be monoethanolamine, diethanolamine or triethanolamine. The alkaline agent may be used singly or in combination of two or more.

In the liquid detergent of the present embodiment, the alkaline agent content is preferably 0.5 to 5% by mass based on the total mass of the liquid detergent.

The metal ion scavenger may, for example, be malonic acid, succinic acid, malic acid, glyoxylic acid, tartaric acid or citric acid.

The metal ion scavenger may be used alone or in combination of two or more.

The content of the metal ion scavenger in the liquid detergent of the present embodiment is preferably 0.1 to 20% by mass based on the total mass of the liquid detergent.

The antioxidant is not particularly limited, and a phenol-based antioxidant is preferred from the viewpoint of good detergency and liquid stability. As a phenolic antioxidant, dibutylhydroxytoluene, butylhydroxyanisole, 2,2'-methylenebis(4-methyl-6-tertiarybutylphenol) or dl-α-tocopherol Preferably, it is preferably dibutylhydroxytoluene or dl-α-tocopherol.

The antioxidant may be used singly or in combination of two or more.

The antioxidant content in the liquid detergent of the present embodiment is preferably 0.01 to 2% by mass based on the total mass of the liquid detergent.

Examples of the texture-enhancing agent include dimethyloxane, polyether-modified oxime, or amine-modified oxime or the like.

The content of the texture enhancer in the liquid detergent of the present embodiment is preferably from 0 to 5% by mass based on the total mass of the liquid detergent.

The fluorescent whitening agent may, for example, be a distyrylbiphenyl type fluorescent whitening agent.

One type of the fluorescent whitening agent may be used alone or two or more types may be used in combination.

The content of the fluorescent whitening agent in the liquid detergent of the present embodiment is preferably from 0 to 1% by mass based on the total mass of the liquid detergent.

Examples of the secondary pollution preventing agent include polyvinylpyrrolidone or carboxymethylcellulose.

The second-degree pollution prevention agent may be used alone or in combination of two or more.

The content of the second-degree pollution preventive agent in the liquid detergent of the present embodiment is preferably 0 to 2% by mass based on the total mass of the liquid detergent.

Examples of the enzyme include proteases, lipases, cellulases, and the like.

The flavoring agent is not particularly limited as long as it is conventionally used in a liquid detergent, and may be, for example, selected from the group consisting of hydrocarbons, ethers, alcohols, phenols, phenol ethers, aldehydes, acetals, ketals, ketones, lactones. A substance such as an ester or a compound containing sulfur, or a natural flavor or a synthetic flavor is appropriately selected. Just like this For example, the fragrance compositions A to D and the like described in Tables 11 to 18 of JP-A-2002-146399 can be cited.

The content of the flavoring agent in the liquid detergent of the present embodiment is preferably 0.1 to 1% by mass based on the total mass of the liquid detergent.

Examples of the coloring agent include acid red 138, Polar Red RLS, acid yellow 203, acid blue 9, blue No. 1, blue No. 205, green No. 3, or turquoise P-GR (all of which are trade names). Pigments and pigments.

The content of the coloring agent in the liquid detergent of the present embodiment is preferably 0.00005 to 0.005 mass% based on the total mass of the liquid detergent.

The opacifying agent may, for example, be a polystyrene emulsion or a polyvinyl acetate emulsion, and an emulsion of 30 to 50% by mass of a solid component is usually suitably used. Examples of the emulsion of the emulsion include a polystyrene emulsion (trade name: SAIVINOL RPX-196 PE-3, solid content 40% by mass, manufactured by SAIDEN Chemical Co., Ltd.).

The content of the opacifier in the liquid detergent of the present embodiment is preferably 0.01 to 0.5% by mass based on the total mass of the liquid detergent.

Examples of the quenched species include hawthorn, bearberry, purple geranium, scutellaria, scutellaria, berberine, scented sage, hyssop, sorghum, chamomile, honeysuckle, sophora flavescens, schizonepeta, laurel, laurel, and Japanese thick. Park, Burdock, Kangfu Grass, Snake Bed, Cellar, Peony, Ginger, Solidago canadensis, Western Sambucus, Sage, Mistletoe, Atractylodes, Thyme, Zhimu, Clove, Wenzhou Citrus, Tea Tree, Xiaoyan , Houttuynia cordata, Nantianzhu, frankincense, white peony, white stalk, wind, psoralen, hops, red sandalwood, mountain grape, yadou wood, western mountain mint, shot dry, mountain perilla, eucalyptus, lavender, rose, rosemary, One leaf orchid, Plant extracts such as cedar, plsam fir, white fresh, terracotta, medlar, ginseng, sweet gum tree, sand ginseng, medlar, black berry, licorice or hypericum.

The content of the quenched matter in the liquid detergent of the present embodiment is preferably from 0 to 0.5% by mass based on the total mass of the liquid detergent.

In order to adjust the pH of the liquid detergent of the present embodiment to a desired value, a pH adjuster may be blended. However, the pH adjuster may not be used only when the liquid detergent under the above components reaches a desired pH.

Examples of the pH adjuster include acidic compounds such as sulfuric acid and hydrochloric acid; and alkanolamines such as monoethanolamine, diethanolamine and triethanolamine, and basic compounds such as sodium hydroxide or potassium hydroxide. From the standpoint of improving the stability over time of the liquid detergent, sulfuric acid, sodium hydroxide, potassium hydroxide or an alkanolamine is preferred, and sulfuric acid or sodium hydroxide is preferred.

These pH adjusters may be used alone or in combination of two or more. The pH adjuster content in the liquid detergent can be appropriately selected depending on the pH of the object.

As a modification of the liquid detergent of the present embodiment, a liquid detergent containing at least (A) to (C) components and containing no water may be used. At this time, the liquid detergent can be dispersed into the water before use, or can be dissolved in the washing water at the time of use.

(Method of manufacturing liquid detergent)

The method for producing the liquid detergent according to the present embodiment may be a method in which the components (A) to (C) and any components required for the dispersion are dispersed in a dispersion medium such as water. As a manufacturing method of a liquid detergent, the following methods are mentioned. The above components (B) to (C) are dispersed in at least an amount of water. At this time, in response to the demand Any of the ingredients will also be dispersed into the water. After visually confirming that these components were sufficiently dispersed in water, the dispersed aqueous solution was adjusted to an arbitrary pH. The pH adjustment agent may be added to the pH adjustment, and other acids, bases or pH buffers may be added. The component (A) is then dispersed into the adjusted pH aqueous solution. Thereafter, it is adjusted to any pH which is the final pH of the liquid detergent, and further water is added to obtain a liquid detergent. The water is preferably added in an amount of 10 to 70% by mass based on the total mass of the liquid detergent, and preferably 20 to 40% by mass.

(How to use liquid detergent)

The method of using the liquid detergent of the present embodiment (the method of washing the liquid detergent of the present embodiment) is the same as the method of using a general liquid detergent.

For example, a method in which a liquid detergent is placed in water together with a laundry and washed in a washing machine; a method in which a liquid detergent is directly applied to a laundry; and a liquid detergent is dissolved in water A method of immersing the laundry in the cleaning liquid as a cleaning liquid or the like. Further, the liquid detergent may be applied to the laundry and placed appropriately, and then washed using a washing machine or the like. In the case where the liquid detergent is placed in water together with the laundry and washed by a washing machine, the amount of the liquid detergent relative to the water changes depending on the composition of the liquid detergent, on a substantially basis. The cleaning effect can be obtained by using a liquid detergent of 0.03 to 1% by volume with respect to the volume of water. The washing time and the number of times will be changed according to the amount of the material to be washed, the material, the weight of the dirt, the liquid detergent component or the liquid detergent concentration, and the basic reference material is used as the main constituent material. In the case of being washed, it is washed and immersed in the desire to wash When the amount of water to be used is 5 to 30 minutes, it is preferably performed by washing for about 5 to 30 minutes. In the method of dissolving a liquid detergent in water as a washing liquid and immersing the laundry therein, the content of the liquid detergent may be the same as that of washing using the above washing machine, but the liquid detergent is thicker ( The effect is high, and the liquid detergent is preferably 0.06 to 5% by volume based on the volume of water.

The laundry is not particularly limited. For example, the liquid detergent of the present embodiment can be suitably applied to a fiber product such as a cloth, a cloth, a bed sheet, a curtain, or a rug.

As described above, according to the present invention, the component (A) having a total mass of 30% by mass or more based on the total mass of the liquid detergent can be contained, so that a high cleaning power can be exhibited in a small amount.

Further, since the liquid detergent contains the components (B) and (C), the film formation and gelation can be favorably prevented.

Further, since the liquid detergent contains the component (C), the odor is good.

Example

Hereinafter, the present invention will be described in detail by way of examples, but the invention should not be construed as limited.

(using raw materials)

<(A) component: nonionic surfactant>

A-1: 1 mole relative to the natural alcohol corresponds to 12 moles of ethylene oxide adduct (LMAO). That is, the one synthesized in the following Synthesis Example 1.

Synthesis of Synthesis Example 1≫A-1

861.2 g of CO-1214 (trade name) manufactured by Procter & Gamble and 2.0 g of NaOH aqueous solution with a total mass of 30% by mass of liquid detergent were fed into a pressure-resistant reaction vessel, and nitrogen substitution was carried out in the vessel. . Subsequently, the inside of the vessel was dehydrated at a temperature of 100 ° C and a pressure of 2.0 kPa or less for 30 minutes, and then the temperature was raised to 160 ° C. Next, while stirring the reaction liquid in the vessel, 760.6 g of ethylene oxide (gas) was slowly added to the reaction liquid. At this time, ethylene oxide was added to the gas jet tube while adjusting the addition rate so that the reaction temperature in the vessel did not exceed 180 °C.

After completion of the addition of ethylene oxide, the inside of the vessel was aged at a temperature of 180 ° C and a pressure of 0.3 MPa or less for 30 minutes, and then the unreacted ethylene oxide was distilled at a temperature of 180 ° C and a pressure of 6.0 kPa or less for 10 minutes. go with.

Next, after cooling the temperature in the vessel to 100 ° C or lower, 70% by mass of p-toluenesulfonic acid was added for neutralization to adjust the pH of the 1 mass % aqueous solution of the reactant to about 7, thereby obtaining A-1 (LMAO).

A-2: Relative to coconut fatty acid methyl ester (by mass ratio of laurel Methyl ester/methyl myristate = a mixture of 8/2) 1 mole, using an alkoxylation catalyst to add 15 moles of ethylene oxide (ethoxylated methyl ester, MEE). That is, the one synthesized in the following Synthesis Example 2.

Synthesis of Synthesis Example 2≫A-2

The synthesis was carried out in accordance with the synthesis method (corresponding to sample D) described in JP-A-2000-144179.

Aluminium hydroxide ‧ magnesium (KYOWARD 300 (trade name), manufactured by Kyowa Chemical Industry Co., Ltd.) having a composition of 2.5 MgO‧Al ₂ O ₃ ‧wH ₂ O was fired at 600 ° C for 1 hour under a nitrogen atmosphere. A calcined aluminum hydroxide ‧ magnesium (unmodified) catalyst was obtained. The calcined aluminum hydroxide ‧ magnesium (unmodified) catalyst 2.2 g, 0.5 N potassium hydroxide ethanol solution 2.9 mL, methyl lauric acid 280 g and methyl myristate 70 g were fed to a 4 L autoclave at a high pressure The catalyst was modified in the kettle. After the inside of the autoclave was replaced with nitrogen, the temperature was maintained at 180 ° C and the pressure was maintained at 0.3 MPa, and 1052 g of ethylene oxide was introduced, and the reaction was carried out while stirring.

The obtained reaction liquid was cooled to 80 ° C, and 159 g of water and 5 g of activated clay and diatomaceous earth as a filtration aid were added, and then the catalyst was separately filtered to obtain A-2 (MEE).

A-3: SOFTANOL 90 (trade name, company day This catalyst system). It is equivalent to 9 moles of ethylene oxide with respect to the second alcohol 1 molar addition of 12 to 14 carbon atoms.

A-4: Lutensol XP90 (trade name, manufactured by BASF Corporation). The alcohol having a carbon number of 10 obtained by supplying pentanol to the Guerbet reaction has a molar equivalent of 9 moles of ethylene oxide.

A-5: relative to the carbon number 10 to 14 of the 1st alcohol 1 mole, the sequential block addition has an average addition molar number of 9 moles of ethylene oxide, the average addition mole number is 2 Moen's propylene oxide, and an average addition mole number of 9 moles of ethylene oxide. R ¹³ in the formula (a2) is a linear alkyl group having 10 to 14 carbon atoms, and p = 9, q = 2, and r = 9. The table is described as an alcohol EOPO adduct.

<(B) component: anionic surfactant>

B-1: LAS, linear alkyl group (carbon number 10 to 14) benzenesulfonic acid (trade name: LIPON LH-200 (LAS-H), pure fraction 96% by mass, manufactured by LION Co., Ltd.), average molecular weight 322 (When manufacturing liquid detergent, by pH adjuster Sodium hydroxide is neutralized to become a sodium salt).

B-2: AES, polyoxyethylene ethyl ether ether sulfate having a carbon number of 12 to 13 (average addition molar number of ethylene oxide 2). That is, it is synthesized by the following Synthesis Example 3.

AES, polyoxyethylene ethyl ether ether sulfate having a carbon number of 12 to 13 (average addition molar number of ethylene oxide 2). That is, it is synthesized by the following Synthesis Example 3.

Synthesis of Synthesis Example 3≫B-2

Neodol 23 (trade name, C12,13 alcohol (a mixture of a carbon number 12 alcohol and a carbon number 13 alcohol ratio of 1/1), a branch ratio of 20% by mass, and a Shell company were fed into a 4 L autoclave. 400g and potassium hydroxide catalyst 0.8g. The inside of the autoclave was replaced with nitrogen, and the temperature was raised while stirring. Thereafter, while the inside of the autoclave was maintained at a temperature of 180 ° C and a pressure of 0.3 mPa, 272 g of ethylene oxide was introduced to obtain a reactant (alcohol ethoxylate) having an average molar addition of ethylene oxide of 2.

280 g of the obtained alcohol ethoxylate was fed to a 500 mL flask equipped with a stirring device to carry out nitrogen substitution, and 67 g of liquid anhydrous sulfane was gradually dropped while maintaining the reaction temperature at 40 °C. After the completion of the dropwise addition, the contents of the flask were stirred for 1 hour (sulfation reaction) to obtain polyoxyethylene ethyl ether ether sulfuric acid. Further, B-2 (AES) was obtained by neutralizing with an aqueous sodium hydroxide solution.

The narrowing ratio of ethylene oxide was measured to evaluate the distribution of the addition mole number of the ethylene oxide of this B-2. The narrowness of ethylene oxide was determined by the following method.

The addition mole number of ethylene oxide of the ethylene oxide adduct which constitutes the most ethylene oxide adducts constituting AES on a mass basis is "nlmax". The total mass (nlmax-1 to 1) of the ethylene oxide adducts of (nlmax-1), nlmax, and (nlmax+1) was calculated for the addition mole number of ethylene oxide. Let the ratio of "nlmax-1~1" to the mass of all ethylene oxide adducts in AES be narrow.

The narrowing ratio of ethylene oxide of B-2 obtained here was 35% by mass.

B-3: a secondary alkanesulfonic acid Na (SAS), SAS30 (trade name, manufactured by CLARIANT JAPAN Co., Ltd.).

B-4: polyoxyalkylene alkyl ether sulfate monoethanolamine salt (linear alkyl group having a carbon number of 10 to 14, PO average addition molar number 1, EO average addition molar number 3).

<(C) component: specific organic solvent>

C-1: 3-methoxy-3-methylbutanol (trade name: SOLFIT, manufactured by Kuraray Co., Ltd.).

C-2: 3-methoxy-3-methylbutyl acetate (trade name: SOLFIT AC, manufactured by Kuraray Co., Ltd.).

<(C') component: comparison product of component (C)>

C'-1: Ethanol (trade name: 95-degree synthesis of a specific alcohol, manufactured by Nippon Alcohol Co., Ltd.).

C'-2: tetracarbitol (manufactured by Nippon Emulsifier Co., Ltd.).

<pH adjuster>

Sodium hydroxide or sulfuric acid: an appropriate amount (to adjust the amount required for the pH in the table). The total of the pH adjusters in the liquid detergents of the respective examples is 0 to 3% by mass.

<water>

Purified water: an amount of balance (the amount of the liquid detergent as a whole is 100% by mass).

<common ingredients>

Hereinafter, the "% by mass" described at the end of each component is the content of the liquid detergent finally adjusted in each case.

p-Toluenesulfonic acid: PTS acid (trade name), manufactured by Kyowa Fermentation Co., Ltd., 1% by mass.

Monoethanolamine: Co., Ltd. Japan Catalyst System... 1% by mass.

Coconut fatty acid: Made by Nippon Oil Co., Ltd....1% by mass.

Palmitic acid: manufactured by Nippon Oil Co., Ltd.... 0.1% by mass.

The flavoring agent: 0.4% by mass of the fragrance composition A shown in Tables 11 to 18 of JP-A-2002-146399.

Dibutylhydroxytoluene (BHT): SUMILZER BHT-R (trade name), manufactured by Sumitomo Chemical Co., Ltd., 0.05% by mass.

Lactic acid: Pure Chemical Co., Ltd....1% by mass.

Coloring agent: Green No. 3, manufactured by Suihuacheng Co., Ltd.... 0.0002% by mass.

Enzyme: CORONASE (trade name), manufactured by NOVOZYMES Co., Ltd.... 0.6% by mass.

Citric acid: liquid citric acid (trade name), manufactured by Tosoh Oil & Fat Industry Co., Ltd.... 0.1% by mass.

(evaluation method)

<stability>

10 g of the liquid detergent of each example was placed in a plastic container (length 5 cm × width) 5 cm × height 3 cm), and stored in a constant temperature and humidity chamber at 25 ° C and 30% RH for 40 hours. The plastic container used in the test has an open end. After the liquid detergent was stored in a constant temperature and humidity chamber for 40 hours, the stability was evaluated in accordance with the following evaluation criteria.

≪Evaluation benchmark≫

◎: No film formation and gelation occurred, and it was uniform and transparent and fluid.

○: There was turbidity, but no film formation and gelation occurred and fluidity was observed.

△: No gelation occurred and fluidity was formed, but a film was formed on the surface.

×: Gelation occurred and the fluidity was remarkably lowered.

<smell>

10 pieces of commercially available wood wool towels (100% cotton) were placed in a double-tank washing machine (trade name: CW-C30A1, manufactured by Mitsubishi Electric Corporation), and 12 mL of tap water and 8 mL of liquid detergent of each example were placed in the foregoing. Double trough washer. With respect to the kapok towel, a washing operation was performed in the washing machine with a weak water flow for 10 minutes, dehydration for 1 minute, water storage washing (1 time, 3 minutes each), and dehydration for 1 minute. The tap water used was at a temperature of 25 °C. The laundry operation was repeated 5 times. A kapok towel after 5 washing operations (after dehydration) was used as a test cloth.

In addition, 16 mL of a 20% by mass aqueous solution of a nonionic surfactant (relative to lauryl alcohol 1 molar addition to an alcohol ethoxylate having an average molar addition of 15 moles of ethylene oxide) was used instead of each case. The liquid detergent was applied and the kapok towel of the above laundry operation was used as a control cloth.

Ten functional inspectors performed functional evaluation of the test cloth and control cloth according to the following evaluation criteria. In order to find the average point of the evaluation points of 10 functional inspectors, make 3.5 points or more be ◎, 3.0 points or more and less than 3.5 points as ○, 2.5 points. Above and below 3.0 points are Δ, and below 2.5 points are ×.

≪Evaluation benchmark≫

1 point: The sensory evaluation cloth has a very strong odor (different from the smell of the flavoring agent) than the control cloth.

2 points: The sensory evaluation cloth is more odorous than the control cloth.

3 o'clock: Feel the evaluation cloth slightly smelly than the control cloth.

4 points: The odor of the evaluation cloth is the same as the odor of the control cloth.

5 o'clock: I feel that the control cloth has a strong odor compared to the evaluation cloth.

(Adjustments of Examples 1 to 21 and Comparative Examples 1 to 5)

In accordance with the composition of Tables 1 and 2, a component (B), a component (C) (or component (C')), and water were placed in a 500 mL beaker, and the mixture was stirred with a magnetic stirrer (manufactured by MITAMURA KOGYO INC.). Next, PTS, monoethanolamine, and coconut fatty acid were added to the beaker, and then pH adjusting agent was added to adjust to pH 7. To the beaker, a residue of the common component other than the enzyme was added, and water was added thereto while stirring to adjust the total amount to 95% by mass, and the pH adjuster was added to adjust the pH in Tables 1 and 2. Next, the enzyme was added to the beaker, and the residual portion of water was added to make the total amount 100% by mass, and the liquid detergent of each example was obtained.

For the obtained liquid detergent, stability and odor were evaluated and the results are shown in the table.

However, the composition in the table is the conversion amount of the pure component of each component.

(Examples 22 to 23)

The liquid detergents of the examples of Examples 22 and 23 were obtained in the same manner as in Examples 1 to 21 in accordance with the composition of Table 3. Further, the C/C' ratio of Example 21 is also shown in Table 3.

In Tables 1 and 2, the evaluation results of the odors are recorded in the upper layer and averaged in the lower layer.

As shown in Tables 1 and 2, the stability evaluation of Examples 1 to 21 to which the present invention is applied is "○" or "◎", and film formation and gelation are well suppressed. Further, in Examples 1 to 21, the odor was evaluated as "○" or "◎" and the odor was suppressed from the component (C).

On the other hand, the stability of Comparative Example 1 in which the component (B) was not contained was evaluated as "Δ", and the stability of Comparative Example 2 in which ethanol was replaced by the component (C) was evaluated as "x". Further, the odor of Comparative Example 3 in which the tetracyl alcohol was replaced by the component (C) was evaluated as "x". The stability of Comparative Example 4 where C/A was 0.02 was evaluated as "Δ", and the odor of Comparative Example 5 having a C/A ratio of 0.67 was evaluated as "X".

From these results, it is understood that the film can be well prevented by applying the present invention. Formed and gelled, and the odor is good.

Industrial availability

According to the liquid detergent of the present invention, the film formation and gelation are well prevented and the odor is good, so that it can be widely used in households and industries where detergents are used.

Claims (11)

A liquid detergent comprising: (A) component: 30% by mass or more of a nonionic surfactant; (B) component: an anionic surfactant selected from one or more of a sulfonate or a sulfate salt; C) component: an organic solvent represented by the following formula (I); a mass ratio of the component (C) / the component (A) is 0.04 to 0.5; In the formula (I), R ¹ to R ³ each independently represent a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, and R ⁴ is a hydrogen atom or an ethylene group. The liquid detergent according to claim 1, wherein two or three of the aforementioned R ¹ to R ³ of the component (C) are hydrogen atoms. The liquid detergent according to claim 1 or 2, wherein one of the aforementioned R ¹ to R ³ of the component (C) is an alkyl group. The liquid detergent according to claim 3, wherein the alkyl group of the aforementioned component (C) has a carbon number of 1 or 2. The liquid detergent according to claim 1 or 2, wherein the aforementioned R ⁴ of the component (C) is a hydrogen atom. The liquid detergent according to claim 1 or 2, wherein the component (C) is 3-methoxybutanol or a derivative thereof. The liquid detergent according to claim 6, wherein the component (C) is 3-methoxy-3-methylbutanol. The liquid detergent according to claim 1 or 2, wherein the content of the component (C) in the liquid detergent is from 1 to 20% by mass based on the total mass of the liquid detergent. The liquid detergent according to claim 8, wherein the component (B) is selected from the group consisting of linear alkylbenzenesulfonic acid or a salt thereof, an alkanesulfonate, a polyoxyethylidene ether sulfate salt, and α At least one of the olefin sulfonates. The liquid detergent according to claim 8, wherein the component (A) is a compound represented by the following formula (a1): R ¹¹ -X-[(EO) _s /(PO) _t ]-R ¹² (a1) (R ¹¹ : a hydrocarbon group having 8 to 18 carbon atoms, X: O, COO or CONH, R ¹² : a hydrogen atom, an alkyl group having 1 to 6 carbon atoms or an alkenyl group having 2 to 6 carbon atoms, []: repeating structure , EO: oxygen extended ethyl, PO: oxygen extended propyl, s: average repeat number of EO, t: average repeat number of PO, s = 3~20, t = 0~6). The liquid detergent according to claim 10, wherein the component (A) is a compound represented by the following formula (a2): R ¹³ -O-[(EO) _p /(PO) _q ]-(EO) _r - H...(a2)(R ¹³ : hydrocarbon group having 8 to 18 carbon atoms, []: repeating structure, EO: oxygen extended ethyl group, PO: oxygen extended propyl group, p: average repeat number of EO, q: average of PO The number of repetitions, r: the average number of repetitions of EO, p>1, r>1, 0<q≦3, and p+r=10~20).