JP2999406B2 - Liquid detergent composition - Google Patents

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 clothing, and more particularly to a liquid detergent composition exhibiting excellent detergency irrespective of the hardness of washing water, and especially when applied directly to a soiled portion of clothing. The present invention relates to a liquid detergent composition having a high removal effect and a low viscosity, which is suitable for washing clothes that are easy to use.

[0002]

2. Description of the Related Art Washing of clothes in ordinary households is repeated using a weakly alkaline detergent. However, stubborn stains such as collars and cuffs of Y-shirts and the like are not removed. Washing is performed by directly applying a liquid detergent or soap to a soiled portion. However, even if such a washing method is performed, a phenomenon in which clothes, especially white underwear, etc. gradually discolors to yellow is commonly experienced. This is because the sebum component of the human body penetrates into the cotton fiber, is not sufficiently removed by ordinary washing, accumulates gradually, and is oxidized, causing yellow discoloration.
To remove these denatured sebum stains, a method of separately adding a bleaching agent or requesting a specialized cleaning company has been employed, but it was not sufficiently satisfactory in view of labor and cost. Accordingly, an object of the present invention is to provide a liquid detergent composition for clothing which has excellent sebum dirt removal power.

[0003]

As a result of various studies, the present inventors have surprisingly found that a specific polyoxyethylene alkyl ether composed of a primary alcohol and a specific polyoxyethylene alkyl ether composed of a secondary alcohol are surprisingly obtained. It has been found that the above-mentioned object can be achieved and a liquid detergent composition excellent in usability can be obtained by blending the above components at a specific mixing ratio and blending a solvent, thereby completing the present invention.

That is, the present invention provides:
(B) a polyoxyethylene alkyl ether obtained by adding an average of 5 to 15 mol of ethylene oxide to a secondary alcohol;
A composition comprising (a) a component and (b) a polyoxyethylene alkyl ether obtained by adding an average of 5 to 15 moles of ethylene oxide to a secondary alcohol having 8 to 16 carbon atoms and a solvent (c); Is 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 clothing of the present invention will be described in detail.

The nonionic surfactant (a) of the present invention is derived from a primary alcohol and has 8 carbon atoms.
~ 16 primary alcohols to ethylene oxide (hereinafter, referred to as
EO), preferably a polyoxyethylene alkyl ether obtained by adding 7 to 12 moles of EO to a primary alcohol having 10 to 14 carbon atoms on average. When the number of carbon atoms in the alkyl group exceeds 16, the detergency decreases, and when it is less than 8, the detergency decreases. If the average number of moles of EO exceeds 15, not only the low-temperature stability of the composition will be inferior, but also the detergency will decrease. On the other hand, if the average number of moles of EO added is less than 5, sufficient cleaning performance is not exhibited.

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

[0007] In the present invention, two of the above (a), (b)
The weight ratio of the various nonionic surfactants 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 deteriorates. When the weight ratio is less than 1/10, the detergency decreases.

[0008] The component (a) and the component (b) are incorporated in the composition in a total 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 when the nonionic surfactant concentrations of (a) and (b) in the composition are as high as 20 to 60% by weight. It can be stably blended, and in addition, good sebum dirt cleaning power can be obtained.

The liquid detergent composition of the present invention further contains a solvent as 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 a hydrogen or methyl group, and x is a number of 1 to 10. Show. As the solvent used in the present invention, a compound represented by the above general formula (I) is preferable. Among them, particularly, R ¹ in the general formula (I) has a phenyl group,
Preferably, 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 Is a method of arbitrarily selecting from among those having 4 to 6 and mixing them at a ratio satisfying the above numerical conditions, or a method of mixing 1 to 4 carbon atoms.
A lower alcohol, benzyl alcohol or phenol 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 above general formula (I) is usually obtained as a mixture of compounds having different values of x in the formula. In the present invention, such a mixture can of course be used, but the compound of x = 0 is not more than 1% by weight, preferably substantially not contained in the mixture, and x> 10
Is less than 4% by weight, preferably less than 1% by weight. The average number of added moles is preferably from 2 to 5. x
When there are many compounds of = 0, not only the detergency is reduced but also the odor tends to be worsened. Also, when there are many compounds with x> 10, the detergency tends to decrease and the viscosity tends to increase.
In addition, in order to make a preferable mixture into a preferable x value range, a top cut or a bottom cut may be performed by distillation, or a catalyst may be devised to produce a mixture having a narrower added mole number distribution.

Component (c) is 0.1 to 30% by weight in the composition,
Preferably, the content is 1 to 30% by weight. By blending the component (c), it is possible to obtain a liquid detergent that is more excellent in detergency and easy to use.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The liquid detergent composition of the present invention essentially comprises the above-mentioned components (a) to (c), with the balance being water and optional components.

In the present invention, a surfactant other than the components (a) and (b) can be blended. As nonionic surfactants, polyoxyethylene alkylphenyl ethers, polyoxypropylene alkyl ethers, polyoxypropylene alkenyl ethers, polyoxybutylene alkyl ethers, polyoxybutylene alkenyl ethers, sucrose fatty acid esters, Examples 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 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) (wherein, R ³ is a linear or branched alkyl group, alkenyl group or alkylphenyl group having an average carbon number of 8 to 18, and R ⁴ is an average carbon number of 2 to 4) G is a residue derived from a reducing sugar having 5 or 6 carbon atoms, x is an average number of 0 to 6, and y is an average number of 1 to 10.)

Examples of the anionic surfactant include an alkylbenzene sulfonate, an alkylene oxide-added alkyl or alkenyl ether sulfate, a fatty acid salt, an olefin sulfonate, and an alkane sulfonate. In particular, an alkylbenzene sulfonate having an average carbon number of 8-20, preferably 10-14, an alkyl ether sulfate having an average alkyl group of 8-20, preferably 10-14, and an average carbon number of the alkyl group. 8-20, preferably 10-14, average ethylene oxide addition mole number 1
To 6, preferably 1 to 4 polyoxyethylene alkyl ether sulfates and fatty acid salts having an average of 10 to 18 carbon atoms. The counter ions constituting salts of these anionic surfactants include sodium, potassium and the like. And alkanolamines such as ammonia or monoethanolamine, diethanolamine and triethanolamine. The anionic surfactant is 1
1 to 15% by weight of the composition,
Preferably, the content is 1 to 10% by weight.

Further, by adding a cationic surfactant, flexibility can be imparted. The cationic surfactant may be added as long as the effect is not inhibited, but 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. Can be added as long as they do not hinder.

The liquid detergent composition of the present invention contains an alkali agent. 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.
At a concentration of 1% by weight, the pH of the composition is from 1 to 20, preferably from 7 to 11, particularly preferably from 7 to 10.5.
% By weight.

Other optional components include, as organic polycarboxylic acids having a divalent metal-capturing ability, nitrilotriacetate, ethylenediaminetetraacetate, iminodiacetate, diethylenetriaminepentaacetate, glycol etherdiaminetetraacetate. , Hydroxyethyl iminodiacetic acid, aminopolyacetate such as triethylenetetramine hexaacetate, and salts such as polyacrylic acid, polymaleic acid, malonic acid, succinic acid, diglycolic acid, malic acid, tartaric acid, and citric acid. Is more preferably a sodium salt or a monoethanolamine salt of citric acid. Other polyvinylpyrrolidone having anti-redeposition ability, polyethylene glycol having an average molecular weight of 5,000 or more, maleic anhydride-diisobutylene copolymer, maleic anhydride-methylvinyl ether copolymer, maleic anhydride-isobutylene copolymer, maleic anhydride Polymers such as a vinyl acetate copolymer and a salt of a high molecular compound such as a naphthalene sulfonate formalin condensate can also be blended within a range that does not hinder the performance of the present composition. Also, proteases, lipases,
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 generally stable in liquid detergents may be added. .

[0020]

Industrial Applicability The liquid detergent composition for clothing of the present invention not only has a detergency by a conventional washing method, but also has an excellent sebum stain removing effect when applied and washed, and is excellent in usability. Having.

[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. The viscosity is measured using a B-type viscometer (Tokyo Keiki PVM-
No. 2 rotor, 60 rpm, using a B-type digital viscometer)
The viscosity at 20 ° C. was measured under the condition of 60 seconds. Table 1 shows the results. The following components were used as the component (a) and the component (b).・ Nonion a ₁ ; straight chain primary alcohol having 12 carbon atoms and EO
Nonionic a ₂ ; straight-chain primary alcohol having 12 carbon atoms with EO
Average 12 moles added was ones Nonionic b _1; linear ones EO to a secondary alcohol were averaged 7 mole adduct Nonionic 12 to 14 carbon atoms b _2; linear second 12 to 14 carbon atoms The average alcohol added with 12 moles of EO to a secondary alcohol. In addition, x of the component (c) is an average number of moles added, and x = 0.
Is less than 0.1% by weight, and the content of compounds having x> 10 is less than 0.1% by weight.

[0023]

[Table 1]

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

(1) Preparation method of artificially stained cloth for evaluating degreasing power 200 g of triolein was dissolved in 80 liters of perclene, and a # 2003 cloth was dipped and adhered. And

(2) Degreasing power evaluation method The artificially stained cloth was cut into a piece of 5 cm × 5 cm, and 0.2 g of the detergent composition per one piece of the artificially stained cloth was applied to an area of 2 cm × 2 cm. Washing was performed at 100 rpm with a tergotometer under the following conditions. <Washing conditions> Washing time 10 minutes Water hardness 4 ° Rinse After washing with tap water for 5 minutes, the portion of the stained cloth coated with the detergent composition was 2 cm ×
It was cut accurately to 2 cm, and a set of five pieces was subjected to Soxhlet extraction for 12 hours using chloroform as a solvent. An uncleaned artificially stained cloth was similarly cut into 2 cm × 2 cm and extracted similarly. Chloroform was removed from the extract using an evaporator, and the amount of extracted triolein was determined. The degreasing rate was determined by the following equation.

[0027]

(Equation 1)

(3) Storage stability test Each of the compositions shown in Table 2 was tested at 40 ° C and -5 ° C, respectively.
After storage for 20 days, the presence or absence of separation, turbidity, 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. In each case, the content of the compound where x = 0 is 0.1% by weight or less, and the content of the compound where x> 10 is 0.1% by weight or less.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Masaki Tsumatori 1334 Minato, Wakayama City, Wakayama Prefecture Kao Corporation Laboratory (56) References JP-A-63-68700 (JP, A) JP-A-52-8809 (JP, A) JP-A-50-88101 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) C11D 1/72-1/722 C11D 3/43 C11D 17/08 WPI / L (QUESTEL )

Claims (3)

(57) [Claims] 1. A (a) polyoxyethylene alkyl ethers and primary alcohols in the ethylene oxide and averaged 7 to 12 mols of 10 to 14 carbon atoms, (b) 10 to 14 carbon atoms
Ethylene oxide in secondary alcohol of 7 to 12 on average
A mole-added polyoxyethylene alkyl ether;
(C) a solvent, the total amount of the component (a) and the component (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 a hydrogen or methyl group, and x represents a number of 1 to 10. ] 3. The liquid detergent composition according to claim 1, wherein component (c) is contained in an amount of 0.1 to 30% by weight.