JPH0257599B2 - - Google Patents

Description

[Detailed description of the invention]

TECHNICAL FIELD The present invention relates to a cleaning composition having excellent cleaning performance and containing an α-sulfo fatty acid di-salt and a tertiary amine oxide in a specific range of proportions. Conventionally, alpha-sulfo fatty acid dialkali metal salts have good detergency in hot water and are desirable detergent compositions from the standpoint of environmental conservation, but they are poorly soluble at normal water temperatures and cannot be used with room temperature water. It is known that when washing, etc., only extremely low cleaning power and foaming power can be obtained. Therefore, the combination of this and sodium alkylbenzenesulfonate (Unexamined Japanese Patent Publication No. 47-1989)
Proposals have been made to improve these drawbacks, such as the use of alcohol in combination with higher alcohol ethoxylates (Japanese Unexamined Patent Publication No. 47-6276). However, these detergents cannot express the surfactant of α-sulfo fatty acid di-salt, and if anion surfactants are added, α-sulfo fatty acid di-salt is expected to have a builder effect. However, it cannot necessarily be said that it is a satisfactory cleaning agent. The present inventors have conducted intensive research to further improve the cleaning performance of α-sulfo fatty acid di-salts and to develop a detergent composition with excellent detergency and foaming power. We have discovered that this objective can be achieved by combining a specific salt and a tertiary amine oxide in a specific amount range,
This led to the present invention. That is, the present invention provides (A) general formula (In the formula, R is an alkyl group having 10 to 16 carbon atoms,
M and M' are both cations that form water-soluble salts selected from the group consisting of magnesium and substituted or unsubstituted ammonium groups, and each may be the same or different) α-sulfo fatty acid di-salt represented by and (B) general formula (In the formula, R ₁ is a linear or branched alkyl group having 12 to 14 carbon atoms, and R ₂ and R ₃ are both a methyl group or an ethyl group.) The present invention provides a cleaning composition characterized in that it contains A)/(B) in a molar ratio of 1.2 to 9. Component (A) used in the composition of the present invention is an α-sulfo fatty acid di-salt represented by the general formula (), in which the salt-forming cation is a group consisting of magnesium and substituted or unsubstituted ammonium groups. A water-soluble salt selected from If R in the general formula () is less than 10 or more than 16, the cleaning performance of the composition will be extremely deteriorated, which is not preferred. Furthermore, it is also disadvantageous when M and M' in the formula are other cations, such as salts such as sodium and potassium, since the cleaning performance of the composition is similarly inferior. Preferably, R has 12 to 14 carbon atoms. Examples of such component (A) include α-sulfolauric acid, α-sulfomiristic acid, α-sulfopalmitic acid, α-sulfostearic acid, α-
Examples include acid magnesium salts, diammonium salts, dimonoethanolamine salts, ditriethanolamine salts, triethanolamine 1/2 magnesium salts, etc. of sulfohydrogenated tallow fatty acids and α-sulfohydrogenated palm oil fatty acids. These may be used alone or in combination of two or more. The di-salt of component (A) can be easily produced by, for example, sulfonating a given fatty acid with SO ₃ gas, introducing a sulfonic acid group into the α-position, and finally neutralizing it with a magnesium compound-substituted or unsubstituted ammonium. can be manufactured. The tertiary amine oxide of component (B) represented by the general formula () used in the composition of the present invention is a mono-long chain alkyl-di-short chain alkyl amine oxide. Long chain alkyl group R ₁ in formula () is the number of carbon atoms
It is necessary that the number is 12 to 14, and it may be linear or branched. If the number of carbon atoms in R ₁ is less than 12, the cleaning performance will be poor, and if it exceeds 14, the cleaning performance will not only decrease, but also the solubility in water will decrease and undesirable phenomena such as cloudiness will occur, which is not preferred. Furthermore, when R ₂ and R ₃ exceed C ₂ , a phenomenon such as clouding occurs when combined with component (A), and cleaning performance also deteriorates. The tertiary amine oxide included in component (B) may be used alone or in combination of two or more. The cleaning composition of the present invention comprises the above component (A) and component (B).
It also contains a combination of and the content ratio is
It is prepared so that the molar ratio of (A)/(B) is in the range of 1.2 to 9. If component (A) exceeds 9 moles or is less than 1.2 moles relative to 1 mole of component (B), the cleaning performance will drop sharply, but in the range of 1.2 to 9 moles of component (A). The composition exhibits significantly increased cleaning power due to the synergistic effect of both components, and has far superior cleaning performance compared to conventional α-sulfo fatty acid di-salt cleaning compositions. As described above, the cleaning composition of the present invention has excellent cleaning performance in room temperature water, which could not be obtained with conventional cleaning agents containing α-sulfo fatty acid di-salt as a cleaning component, and is extremely effective in practical use. It is desirable. EXAMPLES Hereinafter, the present invention will be explained in more detail with reference to Examples, but the present invention is not limited to these Examples. In addition, the evaluation of detergency in the examples was measured and calculated according to the following test method. Cleaning power test: 10g each of soybean oil and beef tallow specified in the Japanese Pharmacopoeia.
After dissolving in 60 ml of chloroform, add 0.1 g of oil red and mix well to prepare a stain solution. Dip a glass plate in this solution to contaminate it,
Air-dry for at least 30 minutes at a temperature of 25℃ to remove chloroform and create dirt pieces (soil amount 20-233mg/
Sheet). The six contaminated pieces were washed at 25°C by stirring in 700 ml of detergent solution at a rotation speed of 250 rpm for 3 minutes, air-dried, weighed, and the oil removal rate after washing was calculated using the following formula. It has cleaning power. Cleaning power (%) = (1 - W ₂ - W ₀ / W ₁ - W ₀ ) x 100 W ₀ : Weight of glass plate W ₁ : Weight of glass plate after contamination W ₂ : Weight of glass plate after cleaning and air drying Weight Examples 1 to 3 and Comparative Examples 1 to 4 Using α-sulfopalmitic acid dimonoethanolamine {α, SF (R=c ₁₄ ) _-2 MEA, NW458} and myristyldimethylamine oxide (MW257), both components Compositions were prepared with varying mixing molar ratios, and each composition was added to separate water to prepare an aqueous solution of the surfactant at a surfactant concentration of 0.05% by weight. Using the aqueous solutions prepared in this way, the cleaning power of each oil stain was measured and evaluated according to the above test method. The components of each composition and their detergency are summarized in Table 1.

[Table] From the above results, it can be seen that the cleaning power of the cleaning composition of the present invention increases synergistically and has excellent cleaning performance. Examples 4 to 7 and Comparative Examples 5 to 6 An aqueous solution of α-sulfofatty acid di-triethanolamine (αSF-DTEA) having different carbon numbers and lauryl dimethylamine oxide at a molar ratio of 23:1 and a surfactant concentration of 0.05 wt% It was prepared and used to evaluate its ability to clean oil stains. The constituent components and evaluation results of each composition are shown in Table 2.

[Table] Examples 8 to 11 and Comparative Examples 7 to 8 α-sulfo palm fatty acid diammonium (αSF-
DNH ₄ , Mw326) and various alkyldimethylamine oxides at a molar ratio of 1.5/1 at a surfactant concentration.
A 0.05wt% aqueous solution was prepared, and the oil stain cleaning power of each detergent aqueous solution was evaluated. The component composition of each composition and the respective evaluation results are shown in Table 3.

[Table] Examples 12 to 15 and Comparative Example 9 Various di-salts of α-sulfo beef tallow fatty acid and C ₁₃ monoalkyldimethylamine oxide (high value ratio 50%) at a molar ratio of 9:1, surfactant concentration 0.05 wt% Aqueous solutions were prepared and a detergency test was conducted on each. Table 4 summarizes the component composition and oil stain cleaning power of each composition.

【table】

Claims (1)

[Claims] 1(A) General formula (In the formula, R is an alkyl group having 10 to 16 carbon atoms,
M and M' are both water-soluble salt-forming cations selected from the group consisting of magnesium and substituted or unsubstituted ammonium groups, and each may be the same or different.) α-sulfo fatty acid di-salt represented by and (B) general formula (In the formula, R ₁ is a linear or branched alkyl group having 12 to 14 carbon atoms, and R ₂ and R ₃ are both a methyl group or an ethyl group.) A cleaning composition characterized by containing A)/(B) in a molar ratio of 1.2 to 9.