JPH09169994A - Liquid cleaning agent composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid cleaning agent composition having excellent cleaning power on sebum stain and high storage stability. SOLUTION: This cleaning agent contains (a) a polyoxyethylene alkyl ether produced by adding ethylene oxide to an 8-16C primary alcohol in an amount of 5-15mol on an average, (b) a polyoxyethylene alkyl ether produced by adding ethylene oxide to an 8-16C secondary alcohol in an amount of 5-15mol on an average and (c) a solvent. The amount of (a)+(b) is 20-60wt.% and the weight ratio of (a)/(b) is 10/1 to 1/10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid detergent composition for clothes, and more particularly, it shows an excellent detergency regardless of the hardness of washing water, and particularly when it is directly applied to a soiled portion of clothes, it becomes dirty. The present invention relates to a liquid detergent composition suitable for washing clothes which has a high removal effect and a low viscosity and is easy to use.

[0002]

2. Description of the Related Art To wash clothes in a general household, a weak alkaline detergent is repeatedly used to wash clothes, but to prevent stubborn stains on collars and cuffs of Y-shirts and the like. Is washed by applying liquid detergent or soap directly to the soiled area. However, even if such a washing method is performed, it is a common experience that clothes, especially white underwear, gradually turn yellow. This is because the sebum component of the human body permeates the inside of the cotton fiber, is not sufficiently removed by ordinary washing, is gradually accumulated, and becomes oxidized and becomes yellow in color.
To remove these modified sebum stains, methods such as adding a bleaching agent separately or requesting a specialized cleaning company have been taken, but it was not satisfactory in view of labor and cost. Therefore, an object of the present invention is to provide a liquid detergent composition for clothes which is excellent in removing sebum stains.

[0003]

As a result of various investigations by the present inventors, surprisingly, a specific polyoxyethylene alkyl ether composed of a primary alcohol and a specific polyoxyethylene alkyl ether composed of a secondary alcohol were surprisingly obtained. It has been found that a liquid detergent composition which achieves the above-mentioned objects and is excellent in usability can be obtained by blending and with a specific mixing ratio and a solvent, and completed the present invention.

That is, the present invention relates to (a) a first carbon number of 8 to 16
(B) a polyoxyethylene alkyl ether prepared by adding an average of 5 to 15 mol of ethylene oxide to a primary alcohol,
In a composition of a component (a) and a component (b), which contains a polyoxyethylene alkyl ether obtained by adding 5 to 15 mol of ethylene oxide to a secondary alcohol having 8 to 16 carbon atoms on average and (c) a solvent. The total amount of 20 to 60% by weight,
Further, the present invention provides a liquid detergent composition characterized in that (a) / (b) weight ratio is 10/1 to 1/10.
Hereinafter, the liquid detergent composition for clothes of the present invention will be described in detail.

The nonionic surfactant as the component (a) of the present invention is derived from a primary alcohol and has 8 carbon atoms.
~ 16 primary alcohol to ethylene oxide (hereinafter,
Abbreviated as EO) is added in an average of 5 to 15 mol, preferably a polyoxyethylene alkyl ether obtained by adding 7 to 12 mol of EO in average to a primary alcohol having 10 to 14 carbon atoms. When the number of carbon atoms in the alkyl group exceeds 16, detergency is reduced, and when it is less than 8, detergency is reduced. Further, when the average number of moles of EO added exceeds 15, not only the low temperature stability of the composition is deteriorated, but also the detergency is lowered. Further, if the average added mole number of EO is less than 5, sufficient cleaning performance is not exhibited.

The nonionic surfactant as the component (b) of the present invention is derived from a secondary alcohol, and the secondary alcohol having 8 to 16 carbon atoms and 5 to 15 EO on average. It is a polyoxyethylene alkyl ether obtained by adding 7 to 12 mol of EO on average, to a secondary alcohol having 10 to 14 carbon atoms. If it deviates from this range, the same problem as described above occurs.

In the present invention, 2 of the above (a) and (b)
The weight ratio of seed nonionic surfactant is (a) / (b)
= 10/1 to 1/10, preferably 3/1 to 1/5.
When the weight ratio exceeds 10/1, the viscosity increases and the usability becomes poor, and when it is less than 1/10, the detergency decreases.

The component (a) and the component (b) are combined in the composition in an amount of 20 to 60% by weight, preferably 30 to 60% by weight. The liquid detergent composition of the present invention does not gel or thicken even if the nonionic surfactant concentration of (a) and (b) in the composition is as high as 20 to 60% by weight. It can be blended in a stable manner and, in addition, good sebum stain cleaning power can be obtained.

The liquid detergent composition of the present invention further contains a solvent as the component (c). Examples of the solvent include ethanol, isopropyl alcohol, butanol, propylene glycol, ethylene glycol and polypropylene glycol. Further, a compound represented by the following formula (I) can also be used as a solvent.

[0010]

Embedded image

[Wherein R ¹ is a linear or branched alkyl group having 1 to 4 carbon atoms, an allyl group, a benzyl group or a phenyl group, R ² is hydrogen or a methyl group, and x is a number from 1 to 10] Show. As the solvent used in the present invention, the compound represented by the general formula (I) is preferable, and among them, R ¹ in the general formula (I) is a phenyl group, especially in terms of the performance of cleaning sebum stains,
It is preferred that R ² is H. The method for producing the compound represented by the formula (I) is not particularly limited, but in the general formula (I), x is 1 to 3 and x is 4 to 10, preferably x Of 4 to 6 are arbitrarily selected, and they are mixed at a ratio satisfying the above numerical conditions, or 1 to 4 carbon atoms.
The lower alcohol, benzyl alcohol, or phenol of 1) is reacted with an oxyalkylene compound such as ethylene oxide or propylene oxide in the presence of an alkali catalyst such as sodium hydroxide or potassium hydroxide. The compound of the general formula (I) is usually obtained as a mixture of compounds having different values of x in the formula. In the present invention, it is of course possible to use such a mixture, but the compound of x = 0 is 1% by weight or less, preferably substantially not contained in the mixture, and x> 10.
The compound is 4% by weight or less, preferably 1% by weight or less. Moreover, 2-5 are preferable as an average addition mole number. x
When there are many compounds of = 0, not only the detergency decreases but also the odor tends to deteriorate. Also, when there are many compounds with x> 10, the detergency tends to decrease and the viscosity tends to increase.
In order to set the preferable mixture within the preferable x value range, top-cutting or bottom-cutting may be performed by distillation, and a catalyst may be devised to produce a mixture having a narrower distribution of added moles.

The component (c) is 0.1 to 30% by weight in the composition,
Preferably 1 to 30% by weight is blended. By blending the component (c), it is possible to obtain a liquid detergent having excellent detergency and convenience.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The liquid detergent composition of the present invention contains the above components (a) to (c) as essential components, and the balance is water and optional components.

In the present invention, a surfactant other than the components (a) and (b) can be blended. As the nonionic surfactant, polyoxyethylene alkylphenyl ethers, polyoxypropylene alkyl ethers, polyoxypropylene alkenyl ethers, polyoxybutylene alkyl ethers, polyoxybutylene alkenyl ethers, sucrose fatty acid esters, Examples thereof include fatty acid glycerin monoesters, higher fatty acid alkanolamides, polyoxyethylene higher fatty acid alkanolamides, amine oxides and alkyl glucosides, preferably alkyl glycosides represented by the following general formula (II). Such an alkyl glycoside can be incorporated in the composition in an amount of 1 to 10% by weight, preferably 1 to 5% by weight. R ³ (OR ⁴ ) _x Gy (II) (In the formula, R ³ is a linear or branched alkyl group having an average carbon number of 8 to 18, an alkenyl group or an alkylphenyl group, and R ⁴ is an average carbon number of 2 to 4 Alkylene group, G is a residue derived from a reducing sugar having 5 or 6 carbon atoms, x is an average of 0 to 6 and y is an average of 1 to 10).

Examples of the anionic surfactant include alkylbenzene sulfonates, alkylene oxide-added alkyl or alkenyl ether sulfates, fatty acid salts, olefin sulfonates and alkane sulfonates. Particularly, an alkylbenzene sulfonate having an average carbon number of the alkyl group of 8 to 20, preferably 10 to 14, an average carbon number of the alkyl group of 8 to 20, preferably 10 to 14 and an average carbon number of the alkyl group. 8-20, preferably 10-14, with an average ethylene oxide addition mole number of 1
To 6, preferably 1 to 4 polyoxyethylene alkyl ether sulfates and fatty acid salts having an average carbon number of 10 to 18 are preferred, and the counterions constituting the salts of these anionic surfactants are sodium, potassium and the like. Alkali metal ions or ammonia or alkanolamines such as monoethanolamine, diethanolamine and triethanolamine. The anionic surfactant is 1
1 to 15% by weight in the composition, by mixing two or more kinds,
It is preferably mixed in an amount of 1 to 10% by weight.

Further, it becomes possible to impart flexibility by blending a cationic surfactant. The cationic surfactant may be blended as long as this effect is not impaired, but it is usually 0.1 to 5% by weight.

As other surfactants, for example, amphoteric surfactants such as alkylcarbobetaine, alkylsulfobetaine, alkylhydroxysulfobetaine, alkylamidohydroxysulfobetaine, alkylamidoamine type betaine and alkylimidazoline type betaine are effective. It can be blended as long as it does not inhibit.

An alkaline agent is added to the liquid detergent composition of the present invention. The alkaline agent to be blended is not particularly limited, but includes alkanolamines such as mono-, di- or triethanolamine, ammonia, N
-Alkylalkanol, N-aminoalkylalkanolamine, dialkylenetriamine and the like, among which alkanolamine and ammonia are preferred, and monoethanolamine, diethanolamine and triethanolamine are particularly preferred from the viewpoint of detergency. These alkaline agents can be used alone or in combination of two or more. These alkaline agents can be used in distilled water at 0.
1-20 so that the pH of the composition at a concentration of 1% by weight is 6-12, preferably 7-11, particularly preferably 7-10.5.
% By weight.

Other optional components include organic polyvalent carboxylic acids capable of capturing divalent metals, such as nitrilotriacetic acid salt, ethylenediaminetetraacetic acid salt, iminodiacetic acid salt, diethylenetriaminepentaacetic acid salt and glycol etherdiaminetetraacetic acid salt. , Hydroxyethyliminodiacetic acid salts, aminopolyacetic acid salts such as triethylenetetramine hexaacetic acid salts, salts of polyacrylic acid, polymaleic acid, malonic acid, succinic acid, diglycolic acid, malic acid, tartaric acid, citric acid, etc. Is more preferably a sodium salt of citric acid or a monoethanolamine salt. Other polyvinylpyrrolidone having anti-redeposition ability, polyethylene glycol having an average molecular weight of 5000 or more, maleic anhydride-diisobutylene copolymer, maleic anhydride-methyl vinyl ether copolymer, maleic anhydride-isobutylene copolymer, maleic anhydride Polymers such as vinyl acetate copolymers and salts of high molecular compounds such as naphthalene sulfonate formalin condensates can also be blended within a range that does not impair the performance of the present composition. In addition, protease, lipase,
Enzymes such as cellulase, enzyme stabilizers such as calcium chloride and magnesium sulfate, fluorescent dyes such as Tinopearl CBS (manufactured by Ciba Geigy), and generally known perfumes that are stable in liquid detergents may be added. .

[0020]

EFFECT OF THE INVENTION The liquid detergent composition for clothes of the present invention has not only the detergency of a usual washing method but also an excellent effect of removing sebum stains even when applied and washed, and is also easy to use. Have.

[0021]

EXAMPLES The present invention will be described below in detail with reference to examples, but the present invention is not limited to these examples.

Example 1 Liquid detergent compositions shown in Table 1 were prepared and the viscosity of each composition was measured. Viscosity is B type viscometer (PVM- manufactured by Tokyo Keiki Co., Ltd.)
B type digital viscometer) using a No. 2 rotor, 60 rpm,
The viscosity at 20 ° C was measured under the condition of 60 seconds. Table 1 shows the results. The following were used as the component (a) and the component (b).・ Nonion a ₁ ; EO for a straight-chain primary alcohol having 12 carbon atoms
With an average of 10 moles added ・ Nonion a ₂ ; EO to C12 straight-chain primary alcohol
An average of 12 moles of nonionic b ₁ ; an average of 7 moles of EO added to a linear secondary alcohol having 12 to 14 carbon atoms; nonion b ₂ ; a linear secondary alcohol of 12 to 14 carbon atoms. Average alcohol added with 12 moles of EO In addition, x in the component (c) is the average number of moles added, and x = 0.
The content of the compound of 1 is 0.1% by weight or less, and the content of the compound of x> 10 is 0.1% by weight or less.

[0023]

[Table 1]

Example 2 Using the nonion a ₂ and nonion b ₁ used in Example 1, a liquid detergent composition shown in Table 2 was prepared, and the following tests were conducted.

(1) Method for preparing artificially contaminated cloth for degreasing power evaluation Dissolve 200 g of triolein in 80 liters of Perkren, dip and attach gold cloth # 2003 cloth, and then remove perkrain to dry the artificially contaminated cloth. And

(2) Degreasing power evaluation method The artificially contaminated cloth was cut into 5 cm × 5 cm, and 0.2 g of the detergent composition was applied to an area of 2 cm × 2 cm per artificially contaminated cloth, and a set of 5 sheets was prepared. It was washed under the following conditions at 100 rpm with a tergotometer. <Washing conditions> Washing time 10 minutes Water hardness 4 ° Rinse After washing with tap water for 5 minutes, the portion of the contaminated cloth applied with the detergent composition is 2 cm ×
Accurately cut into 2 cm, one set of 5 was subjected to Soxhlet extraction for 12 hours with chloroform as a solvent. The unwashed artificially contaminated cloth was similarly cut into 2 cm × 2 cm and extracted in the same manner. Chloroform was removed from the extract using an evaporator, and the amount of extracted triolein was determined. The degreasing rate was calculated by the following formula.

[0027]

[Equation 1]

(3) Storage stability test Each composition shown in Table 2 was tested at 40 ° C and -5 ° C.
It was stored for 20 days, and the presence or absence of separation, cloudiness and precipitation was confirmed.
The evaluation criteria are as follows. ◯: Separation, turbidity, and precipitation did not occur at both 40 ° C and -5 ° C ×: Separation, turbidity, and precipitation occurred at 40 ° C or -5 ° C

[0029]

[Table 2]

In addition, x in the component (c) is the average number of moles added, and in each case, the content of the compound of x = 0 is 0.1% by weight or less, and the content of the compound of x> 10 is 0.1% by weight or less.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Masaki Tsumori 1334 Minato Minato, Wakayama, Wakayama Kao Corporation Research Center

Claims (3)

[Claims] 1. A polyoxyethylene alkyl ether obtained by adding 5 to 15 mol of ethylene oxide on average to (a) a primary alcohol having 8 to 16 carbon atoms, and (b) having 8 to 16 carbon atoms.
Ethylene oxide in the secondary alcohol of 5 to 15 on average
Polyoxyethylene alkyl ether added in moles,
(C) A solvent is contained, the total amount of the components (a) and (b) in the composition is 20 to 60% by weight, and (a) /
(B) A liquid detergent composition having a weight ratio of 10/1 to 1/10. 2. The liquid detergent composition according to claim 1, wherein the solvent (c) is a compound represented by the following formula (I). Embedded image [In the formula, R ¹ represents a linear or branched alkyl group having 1 to 4 carbon atoms, an allyl group, a benzyl group or a phenyl group, R ² represents hydrogen or a methyl group, and x represents a number of 1 to 10. ] 3. The liquid detergent composition according to claim 1, which contains the component (c) in an amount of 0.1 to 30% by weight.