JPH08231996A - Liquid detergent composition - Google Patents

Abstract

PURPOSE: To obtain a liquid detergent composition containing a nonionic surfactant and an alkali agent, having a specific pH, having high washability in a small amount, and also having a high washing performance especially even in a washing condition using city water used in general homes. CONSTITUTION: This liquid detergent composition for clothing, etc., comprises (A) 30-50wt.% of a nonionic surfactant (e.g. a polyoxyethylene alkyl ether), (B) 1-20wt.% of an alkali agent (e.g. triethanolamine), and (C) 0.1-30wt.% of a compound of the formula (R<1> is benzyl, phenyl; R<2> is H, methyl; x is a number of 1-10) (e.g. a polyoxyethylene alkyl phenyl ether), and if necessary, 0.5-10wt.% of an organic polybasic carboxylic acid (e.g. ethylenediaminetetraacetic acid), exhibits a pH of 9.0-10.5 at 20 deg.C, when the 0.1% aqueous solution of the composition is formed, has a high washing force in a small amount, and has the high washing force especially also in washing conditions using city water in general homes.

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 specifically, it has a high cleaning performance in a small amount,
Particularly, the present invention relates to a liquid detergent composition having high cleaning performance even under cleaning conditions in general households.

[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 applying liquid detergent or soap for cleaning or requesting a specialized cleaning company have been taken, but they are not sufficiently satisfactory considering the labor and cost. It was

Japanese Patent Laid-Open No. 3-126796 discloses a liquid detergent composition for dustproof clothes for clean rooms, which contains a specific nonionic surfactant and ethanolamine. In order to provide clothes with less dust in a clean room, the present invention is a composition comprising components that do not generate dust after washing, and is premised on the use of ion-exchanged water as the washing liquid. However, the present inventors have found that when a large amount of alkaline agent is contained, the cleaning power is reduced under the cleaning conditions such as tap water used in ordinary households.

[0004]

Means for Solving the Problems As a result of various investigations by the present inventors, surprisingly, in a liquid detergent for clothes containing a high concentration of a nonionic surfactant and an alkaline agent,
It was found that by adjusting the pH of a 0.1% aqueous solution of the composition at 20 ° C. to 9.0 to 10.5, the above object can be achieved and a liquid detergent composition having high cleaning performance under general household cleaning conditions can be obtained. The invention was completed.

That is, the present invention comprises (A) 30 to 50% by weight of a nonionic surfactant and (B) 1 to 20% by weight of an alkaline agent, and the pH of a 0.1% aqueous solution of the composition at 20 ° C. But
A liquid detergent composition for clothes having a composition of 9.0 to 10.5 is provided.

The liquid detergent composition for clothes of the present invention will be described in detail below.

The nonionic surfactant as the component (A) of the present invention includes (a) those derived from primary alcohols and (b)
Those derived from secondary alcohols are preferably used.

Examples of (a) those derived from primary alcohols include polyoxyethylene alkyl ethers composed of primary alcohols. Preferably, primary alcohols having 8 to 16 carbon atoms are added to ethylene oxide (hereinafter, referred to as Abbreviated as EO) is added to the average of 5 to 15 mol, preferably EO to a primary alcohol having 10 to 14 carbon atoms and 7 to 12 on average.
It is a polyoxyethylene alkyl ether with a mole added. 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.

(B) Examples of secondary alcohol-derived ones include polyoxyethylene alkyl ethers composed of secondary alcohols, preferably secondary alcohols having 8 to 16 carbon atoms and 5 EO on average. It is a polyoxyethylene alkyl ether obtained by adding EO to a secondary alcohol having 10 to 14 carbon atoms in an average of 7 to 12 moles. 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 combined use of certain nonionic surfactants is particularly preferred.

Nonionic surfactants other than the components (a) and (b) include polyoxyethylene alkylphenyl ethers, polyoxypropylene alkyl ethers,
Polyoxypropylene alkenyl ethers, polyoxybutylene alkyl ethers, polyoxybutylene alkenyl ethers, sucrose fatty acid esters, fatty acid glycerin monoesters, higher fatty acid alkanolamides, polyoxyethylene higher fatty acid alkanolamides, amine oxides And alkyl glucosides,
Preferred are alkyl glucosides represented by the following general formula (II). 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).

The nonionic surfactant (A) is added to the composition in a total amount of 30 to 50% by weight, preferably 30 to 40% by weight. A good detergency can be obtained when the above-mentioned compounding amount is 30% by weight or more, but when it exceeds 50% by weight, gelation and thickening occur, which is not preferable.

The liquid detergent composition of the present invention contains (B) an alkaline agent. The alkali agent to be blended is not particularly limited, and examples thereof include alkanolamines such as mono-, di- or triethanolamine, ammonia, N-alkylalkanols, N-aminoalkylalkanolamines and dialkylenetriamines. Of these, alkanolamine and ammonia are preferable, and monoethanolamine, diethanolamine and triethanolamine are particularly preferable from the viewpoint of detergency. These alkaline agents can be used alone or in combination of two or more. These alkaline agents are
It is added in an amount of 1 to 20% by weight so that the pH becomes 9.0 to 10.5.
In the present invention, the pH range is an important factor in detergency, and only in this range can the most effective detergency be obtained.

The liquid detergent composition of the present invention further comprises the following general formula (I) as the component (C).

[0015]

Embedded image

(Wherein R ¹ is a benzyl group or a phenyl group,
R ² is hydrogen or a methyl group, x is the average number of moles of EO added, and is a number from 1 to 10. ).

A compound represented by the formula (1) can be added. The component (C) is incorporated in the composition in an amount of 0.1 to 30% by weight, preferably 1 to 30% by weight. By blending the component (C), it is possible to obtain a liquid detergent having excellent detergency and convenience. Further, R ¹ is preferably a phenyl group and R ² is preferably H in view of the performance of cleaning sebum stains.

The method for producing the compound represented by the above 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 is arbitrarily selected from 4 to 6 and mixed at a ratio that satisfies the above numerical conditions, or an oxyalkylene compound such as ethylene oxide or propylene oxide is added to benzyl alcohol or phenol. Sodium hydroxide,
Examples thereof include a method of reacting in the presence of an alkali catalyst such as potassium hydroxide.

From the viewpoint of detergency, it is preferable to add an organic polycarboxylic acid to the liquid detergent composition of the present invention. As the organic polycarboxylic acid, nitrilotriacetic acid, ethylenediaminetetraacetic acid, iminodiacetic acid, diethylenetriaminepentaacetic acid, glycol etherdiaminetetraacetic acid, hydroxyethyliminodiacetic acid, aminopolyacetic acid such as triethylenetetraminehexaacetic acid, polyacrylic acid, Polymaleic acid, malonic acid, succinic acid, diglycolic acid, malic acid,
Examples thereof include tartaric acid and citric acid, and among these, citric acid is preferable. The organic acid is preferably added to the composition in an amount of 0.5 to 10% by weight, preferably 1 to 5% by weight.
In addition, in the composition, the organic polycarboxylic acid may be present in the form of a salt with the alkali agent of the component (B), but the blending amount is a value in the acid form.

In the present invention, a surfactant other than the (A) nonionic surfactant may be blended. Examples of the anionic surfactant include alkylbenzene sulfonates, alkylene oxide-added alkyl or alkenyl ether sulfates, fatty acid salts, olefin sulfonates, alkane sulfonates and the like. Particularly, an alkylbenzene sulfonate having an average carbon number of 8 to 20 of an alkyl group, an alkyl ether sulfate having an average carbon number of 8 to 20 of an alkyl group, and an average ethylene oxide addition mole number of 1 to 8 with an average carbon number of 8 to 20 of an alkyl group. A polyoxyethylene alkyl ether sulfate of 6 and a fatty acid salt of 10 to 18 carbon atoms are preferable, and as a counter ion constituting a salt of these anionic surfactants, alkali metal ions such as sodium and potassium, or ammonia or Examples thereof include alkanolamines such as monoethanolamine, diethanolamine and triethanolamine. The above-mentioned anionic surfactants can be used alone or in combination of two or more.
Anionic surfactant is 0-10 to improve detergency.
You may mix by weight%.

By adding a cationic surfactant, flexibility can be imparted. Cationic surfactants may be blended as long as they do not inhibit this effect,
It is 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.

The balance of the composition of the present invention is water, which is preferably in the range of 20 to 60% by weight for stability. Also,
Alcohols such as ethanol, ethylene glycol, polyethylene glycols having a molecular weight of 200 or more, glycols such as propylene glycol, and paratoluene sulfonic acid, which are used as a viscosity reducing agent for general liquid detergent compositions, hinder the detergency It may be added unless otherwise specified.

Other optional components include polyvinylpyrrolidone having anti-soil 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. Polymers such as isobutylene copolymers, maleic anhydride-vinyl acetate copolymers, and salts of polymer compounds such as naphthalene sulfonate formalin condensates can also be blended within a range that does not impair the performance of the present composition. . Also, enzymes such as protease, lipase and cellulase, enzyme stabilizers such as calcium chloride and magnesium sulfate, and Tinopearl CBS (manufactured by Ciba Geigy).
Fluorescent dyes such as, and generally known perfumes that are stable in liquid detergents may be added.

[0025]

EFFECTS OF THE INVENTION A small amount of a liquid detergent composition having a high cleaning performance, and in particular, a high cleaning performance even under general household cleaning conditions can be obtained.

[0026]

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

Example 1 A liquid detergent composition shown in Tables 1 and 2 (hereinafter referred to as a washing liquid) was prepared, and the pH of the washing liquid was measured by the following method.
The cleaning test shown below was performed. The results are shown in Tables 1 and 2.

(1) The pH of the cleaning solution was measured under the following conditions. Water hardness: 4 ° DH Water temperature: 20 ° C. Detergent concentration: 0.1% pH meter: HORIBA, Ltd. glass electrode type hydrogen ion concentration meter D-14 type (2) Cleaning test method <sebum-contaminated cloth> The sebum stain-contaminated cloth (artificial stain cloth) used was a 10 × 10 cm cotton cloth uniformly coated with 2 g of model sebum stain consisting of the following composition.

* Model sebum stain composition Cottonseed oil 60% Oleic acid 10% Palmitic acid 10% Liquid and solid paraffin 10% <Washing conditions and evaluation method> 10 x 10 cm sebum stain contaminated cloth (artificial stain) for 1 liter of detergent aqueous solution for evaluation 5 pieces of cloth) were put and washed with a targotometer at 100 rpm under the following conditions. The washing conditions are as follows.

* Washing conditions Washing time 10 minutes Washing agent concentration 0.1% Water hardness 4 ° DH Water temperature 20 ° C Rinse 5 minutes with tap water Detergency is 550 nm of original cloth before and before and after cleaning
The reflectance at the camera using a colorimeter (Z-300 manufactured by Nippon Denshoku Co., Ltd.)
A) was measured and the cleaning rate (%) was calculated by the following formula.
(The table shows the measured average cleaning rate of 5 sheets.)

[0031]

[Equation 1]

[0032]

[Table 1]

[0033]

[Table 2]

The abbreviations in the table are as follows.

Balance: Amount for making the whole 100. Nonion a; For linear primary alcohol having 10 to 14 carbon atoms
EO with an average of 7 moles added ・ Nonion b; to a linear secondary alcohol having 10 to 14 carbon atoms
EO added with an average of 7 moles-Compound c; polyoxyethylene monophenyl ether (average number of moles of EO added = 3) -LAS; sodium alkylbenzene benzenesulfate having 10 to 14 carbon atoms-ES; polyoxyethylene alkyl Sodium ether sulfate (average number of moles of EO added = 2.5, carbon number of alkyl group 10-14)

Claims (5)

[Claims] 1. A nonionic surfactant (A) 30 to 50% by weight
And (B) an alkaline agent in an amount of 1 to 20% by weight, and a 0.1% aqueous solution of the composition having a pH at 20 ° C. of 9.0 to 10.5. 2. The liquid detergent composition for clothes according to claim 1, which comprises (C) 0.1 to 30% by weight of a compound represented by the following general formula (I). Embedded image (In the formula, R ¹ represents 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 for clothes according to claim 1, which contains 0.5 to 10% by weight of an organic polycarboxylic acid. 4. The liquid detergent composition for clothes according to claim 1, wherein the alkaline agent is one kind or a mixture of two or more kinds selected from monoethanolamine, diethanolamine and triethanolamine. 5. The liquid detergent composition for clothes according to claim 1, which contains an alkylbenzene sulfonate and / or a polyoxyethylene alkyl ether sulfate.