JPH0358399B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a liquid cleaning composition for clothing that has excellent detergency and good permeability into fibers. Conventionally, it is well known that anionic surfactants and ethoxylate type nonionic surfactants are used as main surfactants in liquid detergent compositions for clothing (Japanese Patent Laid-Open No. 84605/1983). , JP-A-51-4204, JP-A-52-38508
(Japanese Patent Application Laid-open No. 53-86707). The present inventors conducted various studies on cleaning compositions containing the above-mentioned anionic surfactants and nonionic surfactants, and found that among the anionic surfactants, those with an alkyl group having 11 to 15 carbon atoms Yes, and the average number of added moles of ethylene oxide is 2
The alkyl polyethoxy sulfate ester salts with 5 to 5 have excellent detergency, and among nonionic surfactants, the alkyl group has 11 to 15 carbon atoms and has the lowest ethylene oxide Higher alcohol ethoxylates with an average addition mole number of 13 to 20 have the best detergency, and a combination of this and the above-mentioned anionic surfactant alkyl polyethoxy sulfate salt is suitable for clothing. It was found that it has excellent foaming and cleaning power, which is essential for liquid cleaning compositions. However, this cleaning composition has the following drawbacks. In other words, when using a liquid detergent composition for clothing at home, in addition to dissolving a certain amount of the undiluted solution in a washing bathtub and washing the clothes, the undiluted detergent solution is usually applied directly to heavily soiled areas such as sleeve openings and collars. A commonly used method is to sprinkle it on top and then wash it in a washing machine. In this washing method, when a cleaning composition containing the above-mentioned anionic surfactant and nonionic surfactant is sprinkled directly onto heavily soiled areas of clothing, this cleaning composition penetrates into the fibers. It has the disadvantage of being difficult to apply. The permeability of fibers changes depending on the viscosity, so the problem of permeability can be solved by using a large amount of a conventionally used viscosity reducing agent such as ethanol. A problem with detergent compositions used in large amounts is that if the undiluted solution is taken into a measuring cup and left to stand, it will gel in a short period of time, making it difficult to apply. As a result of further intensive research to solve these problems, the present inventors found that lower alkylbenzene sulfonate was added to the combination of the above-mentioned anionic surfactant and nonionic surfactant in a specific ratio. It was discovered that by adding a predetermined amount of polyethylene glycol with a specific molecular weight, the permeability into fibers was specifically improved without deteriorating the detergency, and based on this knowledge, the present invention was completed. It came to this. That is, the present invention is based on (A) the general formula RO(CH ₂ CH ₂ O) _o SO ₃ M...() (R in the formula is an alkyl group having 11 to 15 carbon atoms, and n is 2
(B) an anionic surfactant represented by the general formula R ¹ O(CH ₂ CH ₂ O) _n H…( ) (In the formula, R ¹ is an alkyl group having 11 to 15 carbon atoms, m is
The average number of added moles of ethylene oxide is 13 to 20).
(B) The sum of the components is 25 to 45% by weight, the weight ratio of component (A) to component (B) is 8:2 to 4:6, and (C) lower alkylbenzenesulfonic acid. 4% by weight or more of an alkali metal salt of, and (D) molecular weight
The present invention provides a liquid detergent composition for clothing, characterized in that it contains 1% by weight or more of polyethylene glycol having a molecular weight of 600 to 4,000. The anionic surfactant used as component (A) in the liquid detergent composition for clothing of the present invention is an alkyl polyethoxy sulfate salt having a structure represented by the above general formula (), and R in the formula is an alkyl group having 11 to 15 carbon atoms, preferably 12 to 13 carbon atoms,
Average number of moles of ethylene oxide added for n2-5, M
is an alkali metal such as potassium or sodium, an alkanolamine such as monoethanolamine, diethanolamine, triethanolamine, or ammonium. The higher alcohol used as a starting material for this anionic surfactant may be a natural product or a synthetic product obtained by the oxo method or the like, and may be either a straight chain or a branched chain. If the number of carbon atoms in the alkyl group is less than 11, the resulting surfactant will have poor detergency and foaming power, and if it exceeds 15, the liquid stability will deteriorate. Furthermore, in the above-mentioned anionic surfactant, the average number of added moles of ethylene oxide is 2.
If it is less than 5, the liquid stability deteriorates, and if it exceeds 5, the foaming power decreases. The nonionic surfactant used as component (B) in the liquid cleaning composition for clothing of the present invention is a higher alcohol ethoxylate having a structure represented by the above general formula (), in which R ¹ is carbon number 11
~15 alkyl groups, m is the average number of added moles of ethylene oxide from 13 to 20. In this nonionic surfactant, the higher alcohol used as a starting material is, for example, an alcohol synthesized from olefin by the oxo method or improved oxo method, an alcohol synthesized using a Ziegler catalyst, an alcohol obtained by paraffin oxidation, or Alcohol derived from natural oils and fats, alcohol obtained through fermentation, etc.
As long as the alkyl group has 11 to 15 carbon atoms, it may be either a straight chain or a branched chain. The nonionic surfactant used as component (B) is
By adding 13 to 20 moles of ethylene oxide on average to 1 mole of a primary alcohol or secondary alcohol in which the alkyl group has 11 to 15 carbon atoms in the presence of an alkali catalyst or an acid catalyst. can get.
A preferred nonionic surfactant is one in which 15 to 17 moles of ethylene oxide is added on average to 1 mole of a primary alcohol in which the alkyl group has 12 to 13 carbon atoms, or a surfactant in which the alkyl group has 12 to 14 carbon atoms. Average ethylene oxide per mole of secondary alcohol
15 to 17 moles were added. If the number of carbon atoms in the primary or secondary alcohol is less than 11, the detergency of the resulting surfactant will be low;
If it exceeds 15, the liquid stability will deteriorate. Furthermore, the average number of added moles of ethylene oxide is 13
If the value is outside the range of ~20, the cleaning power will decrease. In the liquid detergent composition for clothing of the present invention,
The sum of component (A) and component (B) is 25 to 45% of the total amount of the composition.
% by weight, and the weight ratio of component (A) to component (B) is 8:
It is necessary to contain both components in a ratio of 2 to 4:6, and the preferred weight ratio of component (A) to component (B) is in the range of 6:4 to 4:6. If the sum of components (A) and (B) is less than 25% by weight, the cleaning performance will be poor, and if it exceeds 45% by weight, the liquid stability will deteriorate. On the other hand, if the weight ratio of component (A) to component (B) is out of the range of 8:2 to 4:6, the permeability into fibers will deteriorate. Examples of the alkali metal salts of lower alkylbenzenesulfonic acids used as component (C) in the liquid detergent composition for clothing of the present invention include alkali metal salts of toluenesulfonic acid and xylene sulfonic acid, which can be used in the present invention. In order to improve the permeability into fibers, which is the effect of the above, it is necessary to contain 4% by weight or more based on the total amount of the composition, and if the content is less than 4% by weight, the permeability effect into fibers will be poor. A particularly preferred content is in the range of 5.0 to 10.0% by weight. The polyethylene glycol used as component (D) in the liquid laundry detergent composition of the present invention has a molecular weight in the range of 600 to 4000, such as polyethylene glycol 600, 1000, 1500, 2000,
4000, etc., and these may be used alone or in combination of two or more. Those with a molecular weight of less than 600 or more than 4000,
Poor penetration into fibers. The content of this polyethylene glycol is 1% by weight based on the total amount of the composition.
If it is less than 1% by weight, good permeability into fibers, which is the effect of the present invention, cannot be obtained. The liquid laundry detergent composition of the present invention is prepared by dissolving each of the above-mentioned components in water or a water-based solvent. other ingredients such as foam boosters such as alkyl amine oxides and fatty acid alkanolamides, hydrotropes such as lower alcohols and polyhydric alcohols, fungicides such as benzoates, chelating agents such as EDTA, or dyes and fragrances. etc. can also be added. The liquid detergent composition for clothing of the present invention is mainly composed of a specific anionic surfactant and a nonionic surfactant, to which a specific third component is added, and has excellent detergency and foaming properties. It has extremely high commercial value as it has strong strength and good permeability into fibers. Next, the present invention will be explained in more detail with reference to Examples. In addition, each performance in Examples was evaluated according to the test method shown below. (1) Cleaning power test: Using Terg-Tometer manufactured by USTesting as a cleaning device, 10 sheets of protein-containing wet artificially soiled cloth and Sebam cloth cleaning stockinette cloth were placed in it, and the bath was heated at 120 rpm at a bath ratio of 30 times. Wash at 25°C for 10 min at pm. The cleaning solution is 900 with a cleaning agent concentration of 0.1% by weight.
ml and rinse with 900 ml of water for 3 minutes.
The water used was 3°DH. A detergency test was conducted in this way, and the detergency was calculated according to the following formula. Cleaning power (%) = (K/S of dirty cloth
Cleaned cloth K/S)/(Dirty cloth K/S-Unsoiled cloth K/
S)×100 K/S=(1-R/100) ² /2R/10
0 R: Reflectance (%) (2) Foaming test; Half of 14 skin shirts worn for 3 days are washed with the test detergent composition, and the remaining 14 skin shirts are washed with the control detergent. For cleaning, we used a jet-type electric washer "Chikuma" manufactured by Mitsubishi Electric Co., Ltd., and the cleaning agent concentration was
0.1% by weight liquid, liquid volume 30, liquid temperature 25℃, bath ratio 30 times,
The washing time was 10 minutes. Foaming is evaluated by smoothing the foam generated after washing over the entire water surface, measuring the foam height at 5 locations, averaging it, and using the following formula to calculate the converted value when the foam height of the control detergent is set to 15 mm. expressed. Foam height when washed with the test detergent / Foam height when washed with the control detergent x 15 (mm) The composition of the control detergent is ethoxylate of primary alcohol (alkyl group with 9 to 9 carbon atoms).
11, average carbon number 10, average number of added moles of ethylene oxide 10) 20% by weight, _C12 linear alkylbenzenesulfonate sodium 15% by weight, soap
-DEA 2% by weight, ethanol 5% by weight, and water balance, detergency was 58%, foaming was 15mm, and permeability was 180sec or more. (3) Penetration into fibers 0.4 ml of the liquid detergent was dropped onto three layers of 100 broad cotton cloth, and the time (sec) until all the dropped liquid penetrated into the fibers was measured. According to this evaluation method, if the penetration time is 60 seconds, it can be said that there is no problem in practical use. In addition, the types (), () and abbreviations of each component in Examples and Comparative Examples indicate the following compounds. (): C ₁₂ /C ₁₃ alcohol (C ₁₂ alcohol/
_C13 alcohol weight ratio 50/50, linear chain rate 80%)
Ethoxylate (EO=15) (): C ₁₂ /C ₁₃ alcohol (C ₁₂ alcohol/
_C13 alcohol weight ratio 50/50, linear chain rate 80%)
Ethoxylate (EO = 18) AES-Na: C ₁₃ alkyl (linear chain ratio 50%) polyethoxy nitrate sodium salt (EO = 3) TS-Na: Sodium toluene sulfonate XS-Na: Sodium xylene sulfonate Example 1 C ₁₃ alkyl (linear chain ratio 50%) polyethoxy sulfate ester sodium salt (EO = 3) 15-21% by weight, C ₁₂ / C ₁₃ alcohol (C ₁₂ alcohol / C ₁₃ alcohol weight ratio 50/50, linear chain ratio 80 %) Ethoxylate (EO = 15 or 18) 10-20% by weight, sodium toluenesulfonate or sodium xylene sulfonate 4-7%, polyethylene glycol (MW = 1000 or 4000) 2-3% by weight, ethanol 5% by weight Various liquid cleaning compositions containing water and water were prepared, and the performance of each composition was evaluated. The results are shown in Table 1 along with the component composition.

[Table] Example 2 C ₁₃ alkyl (linear rate 50%) polyethoxy sulfate ester sodium salt (EO = 3) 22% by weight,
C ₁₂ / C ₁₃ alcohol (C ₁₂ alcohol / C ₁₃ alcohol weight ratio 50/50, linear chain rate 80%) Ethoxylate (EO = 15) 13% by weight, sodium toluene sulfonate or sodium xylene sulfonate 5-6
Various liquid cleaning compositions were prepared containing 1 to 5% by weight of various polyethylene glycols, 5% by weight of ethanol, and water, and the performance of each was evaluated. The results are shown in the second section along with the component composition.
Shown in the table.

[Table] Example 3 C ₁₃ alkyl (linear chain rate 50%) polyethoxy sulfate ester sodium salt (EO = 3) 15-25% by weight, C ₁₂ / C ₁₃ alcohol (C ₁₂ alcohol / C ₁₃ alcohol weight ratio 50 / 50, linearity 80%) ethoxylate (EO=15) 10-20% by weight, sodium toluenesulfonate 6% by weight, polyethylene glycol with a molecular weight of 1000 2% by weight, ethanol 5% by weight
Various liquid cleaning compositions containing water and water were prepared, and the performance of each composition was evaluated. The results are shown in Table 3 along with the component composition.

[Table] Comparative Example Liquid cleaning compositions having the component compositions shown in Table 4 were prepared, and the performance of each was evaluated. The results are shown in Table 4.

【table】

【table】

Claims (1)

[Claims] 1 (A) General formula RO(CH ₂ CH ₂ O)nSO ₃ M (R in the formula is an alkyl group having 11 to 15 carbon atoms, n is the average number of added moles of ethylene oxide of 2 to 5, M
is an alkali metal, ^alkanolamine or _{ammonium )} ^; alkyl group, m
is the average number of moles of ethylene oxide added from 13 to 20).
(B) The sum of the components is 25 to 45% by weight, the weight ratio of component (A) to component (B) is 8:2 to 4:6, and (C) lower alkylbenzenesulfonic acid. 4% by weight or more of an alkali metal salt of, and (D) molecular weight
A liquid detergent composition for clothing, characterized in that it contains 1% by weight or more of polyethylene glycol of 600 to 4000 polyethylene glycol.