JPH08283780A - Liquid detergent composition - Google Patents

Abstract

PURPOSE: To obtain a liq. detergent compsn. for clothes which is excellent in the removal of staining due to sebum and exhibits a higher detergency on partial staining of colloars or sleeves, by combining specific polyoxyethylene alkyl ethers with a specific component. CONSTITUTION: The compsn. contains a polyoxyethylene alkyl ether (A) having a prim. alcohol-derived alkyl group, a polyoxyethylene alkyl ether (B) having a sec. alcohol-derived alkyl group in a wt. ratio to component A of (1/10)-(10/1), and 0.1-20wt.% polyethylene glycol (C) having an average mol.wt. of 200-5,000. Pref. component A is an adduct of on average 5-15mol of ethylene oxide to an 8-16C prim. alcohol; and component B is an adduct of on average 5-15mol of ethylene oxide to an 8-16Csec. alcohol. The sum of the concns. of components A and B is 20-60wt.%. The compsn. contains an alkaline agent in such an amt. that the pH of the compsn. is 6-12.

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 applied directly to a soiled portion of clothes. 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 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

As a liquid detergent, Japanese Patent Publication No. 3-5839
In No. 9 publication, alkyl ether sulfate and polyoxyethylene alkyl ether are blended in a specific ratio, and further lower alkylbenzene sulfonate and low molecular weight polyethylene glycol are blended to achieve coating with excellent permeability to fibers. Although it has been disclosed that a liquid detergent for clothing can be obtained, it is still insufficient for cleaning collars, sleeve stains and the like.

Accordingly, it is an object of the present invention to provide a liquid detergent composition for clothes which has an excellent ability to remove sebum stains and a higher detergency against so-called partial stains such as collar and sleeve stains.

[0005]

As a result of various investigations, the present inventors have surprisingly identified a polyoxyethylene alkyl ether composed of a primary alcohol and a polyoxyethylene alkyl ether composed of a secondary alcohol. It has been found that a liquid detergent composition which achieves the above-mentioned object and is excellent in usability can be obtained by blending in a mixing ratio and using polyethylene glycol having a relatively low molecular weight in combination, thus completing the present invention. It was

That is, the present invention contains (a) a polyoxyethylene alkyl ether having an alkyl group derived from a primary alcohol and (b) a polyoxyethylene alkyl ether having an alkyl group derived from a secondary alcohol. And (a) / (b) weight ratio of 10/1 to 1/10, and (c) 0.1-20% by weight of polyethylene glycol having an average molecular weight of 200-5000. A cleaning composition is provided. 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, preferably a primary alcohol having 8 to 16 carbon atoms and ethylene oxide (hereinafter referred to as EO). Abbreviated) is added to an average of 5 to 15 mol, preferably a primary alcohol having 10 to 14 carbon atoms.
It is a polyoxyethylene alkyl ether to which 7 to 12 moles of EO are added on average. 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, preferably a secondary alcohol 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 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.

Further, the components (a) and (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 further comprises, as the component (c), an average molecular weight of 200 to 5000, preferably an average molecular weight of 2
Contains from 00 to 2000 polyethylene glycol. When the average molecular weight of polyethylene glycol exceeds 5,000, not only the detergency for sebum stains decreases but also the stability of the composition deteriorates. Such polyethylene glycol is incorporated in the composition in an amount of 0.1 to 20% by weight, preferably 1 to 10% by weight. The content of polyethylene glycol is 0.1% by weight
If it is less than 20% by weight, the effect of the present invention cannot be obtained, and if it exceeds 20% by weight, the detergency is lowered.

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 glycosides, preferably alkyl glycosides represented by the following general formula (II). R ³ (OR ⁴ ) _x G _y (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 2. 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.) Anionic surfactant Examples thereof 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 carbon number of 8 of an alkyl group.
Polyoxyethylene alkyl ether sulfate having an average ethylene oxide addition mole number of 1 to 6 and an average carbon number of 10
~ 18 fatty acid salts are preferred, as the counter ions constituting the salts of these anionic surfactants, alkali metal ions such as sodium and potassium, or ammonia or monoethanolamine, diethanolamine, alkanolamines such as triethanolamine. Can be mentioned. The above-mentioned anionic surfactants can be used alone or in combination of two or more.

Further, by adding a cationic surface active agent, it becomes possible to impart flexibility. The cationic surfactant may be blended as long as it does not inhibit this effect,
Usually, 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. 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 are blended in an amount of 1 to 20% by weight so that the composition has a pH of 6 to 12, particularly preferably 7 to 11.

The balance of the composition of the present invention is water, but alcohols and glycols used as a viscosity reducing agent for general liquid detergent compositions may be added as long as the detergency is not impaired.

Other optional components include organic polycarboxylic acids having a divalent metal-trapping ability, 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-soil redeposition ability, polyethylene glycol having an average molecular weight of more than 5000, 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. .

[0017]

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.

[0018]

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 was prepared using the various components shown in Table 1, and the following tests were conducted. Table 1 shows the results.

(1) Method for preparing artificially contaminated cloth for degreasing power evaluation Dissolve 200 g of triolein in 80 liters of perkren, immerse and attach gold cloth # 2003 cloth, and then dry and remove perkren to give 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 onto 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.

[0022]

[Equation 1]

[0023]

[Table 1]

(Note) Nonionic surfactant a ₁ ; EO adduct of straight chain primary alcohol having 12 carbon atoms (average number of moles added: 8) Nonionic surfactant b ₁ ; straight chain secondary chain having 12 to 14 carbon atoms EO adduct of alcohol (average number of moles added: 7) PEG 200; polyethylene glycol average molecular weight 2
00 PEG 2000; polyethylene glycol average molecular weight 2
000 PEG 4000; polyethylene glycol average molecular weight 4
000 PEG 20000; polyethylene glycol average molecular weight 2
0000 Sodium alkylbenzene sulfonate; The alkyl group is a linear alkyl group having 12 to 14 carbon atoms.

Claims (4)

[Claims] 1. A polyoxyethylene alkyl ether having an alkyl group derived from a primary alcohol (a) and a polyoxyethylene alkyl ether having an alkyl group derived from a secondary alcohol (b),
(a) / (b) weight ratio of 10/1 to 1/10, and (c) 0.1 to 20% by weight of polyethylene glycol having an average molecular weight of 200 to 5000, which is a liquid detergent. Composition. 2. The component (a) is a polyoxyethylene alkyl ether obtained by adding an average of 5 to 15 mol of ethylene oxide to a primary alcohol having 8 to 16 carbon atoms.
The liquid detergent composition described. 3. The component (b) is a polyoxyethylene alkyl ether obtained by adding an average of 5 to 15 mol of ethylene oxide to a secondary alcohol having 8 to 16 carbon atoms.
Or the liquid detergent composition according to item 2. 4. The liquid detergent composition according to claim 1, wherein the total amount of the components (a) and (b) in the composition is 20 to 60% by weight.