JPS6264898A - Liquid detergent composition - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a liquid detergent composition that is low in odor and exhibits extremely little odor due to changes over time.

More specifically, improved aliphatic primary compounds having 6 to 30 carbon atoms
A stabilized aliphatic primary alcohol ethoxylate having 6 to 30 carbon atoms, which is obtained by reacting a primary alcohol with ethylene oxide and which exhibits extremely little change in quality over time. The present invention relates to the use of the compound as a base material for a liquid cleaning composition.

Aliphatic primary alcohol ethoxylates having 6 to 30 carbon atoms are used in a wide range of fields as the main cleaning active ingredient in liquid cleaning compositions. For example, it is used in kitchen dishwashing detergents, shampoos, wool washing detergents, heavy duty laundry detergents, other powdered household detergents, household detergents, cleaning detergents, automobile detergents, and the like.

Various fragrances are generally added to these liquid detergents depending on their use. However, if there is a problem with the strength of the aliphatic primary alcohol T-toxylate having 6 to 30 carbon atoms, which is the main cleaning active ingredient, the fragrance may not be able to exert its original effects. The present invention relates to lactic acid and/or
Alternatively, by using a primary alcohol ethoxylate containing milk Mi'A as a raw material for a liquid cleaning agent, a high quality liquid cleaning agent that is low in odor and exhibits extremely little odor due to change over time is provided.

(Prior art) As a raw material for liquid detergent, it has the following properties: cleaning power, easy non-adhesiveness, hard water resistance, compatibility, easy dissolution1, low temperature stability (cold resistance), foam removal,
In particular, aliphatic primary alcohol ethoxylate having 6 to 30 carbon atoms is used in the case of zuzugitake. Generally, the ethoxylated aliphatic primary alcohol having 6 to 30 carbon atoms is an alkali catalyst such as sodium hydroxide, potassium hydroxide, sodium alkoxide, or boron trifluoride, boron trifluoride, antimony pentachloride, It is produced by adding ethylene oxide to a primary alcohol in the presence of an acidic catalyst such as tin tetrachloride.

The aliphatic primary alcohol ethoxylate having 6 to 30 carbon atoms obtained by 1q in such a method has 6 to 3 unreacted carbon atoms.
In addition to containing 0 aliphatic primary alcohols, it also contains catalysts, aldehydes, free acids, esters, peroxides, and other substances that may cause odor or color.
Contains trace amounts of substances.

Impurities such as aldehydes, free acids, esters, and peroxides are removed by washing with aqueous alkaline solutions, saponification, and distillation, and alkaline catalysts are usually removed by adding mineral acids such as sulfuric acid, phosphoric acid, or acetic acid. It is purified by Japanese processing. The primary alcohol ethoxylate thus obtained contains other impurities that cause bad odor and coloration, and has the problem of generating bad odor as it changes over time. Additionally, when ethoxylates of aliphatic primary alcohols having 6 to 30 carbon atoms that have changed over time are sulfated with a sulfating agent such as sulfur trioxide or chlorosulfonic acid, the hue of the sulfates produced becomes significantly worse. There's a problem.

As mentioned above, when aliphatic primary alcohol ethoxylate having 6 to 30 carbon atoms obtained by the conventional technology is used to make a liquid cleaning product, there are problems with product quality, product quality, and deterioration. 4, which is not desirable.

In particular, by avoiding the reaction of aliphatic primary alcohols having 6 to 30 carbon atoms with ethylene oxide, aliphatic primary alcohols having 6 to 30 carbon atoms are
Alkaline catalysts such as sodium hydroxide, potassium hydroxide, and sodium alcohol 4:side used in the production of alcohol ethoxylates are usually treated with a mineral acid such as sulfuric acid or phosphoric acid, or a neutralizing agent such as acetic acid. However, using this conventional neutralizing agent, carbon atoms with a carbon number of 6 to
When No. 30 aliphatic primary alcohol ethoxylate is used as a raw material for a liquid cleaning agent, it already has an odor at the time of blending, and the odor also develops over time, making it difficult to produce a liquid cleaning agent with little odor. It was a big problem.

(Problems to be Solved by the Invention) The object of the present invention is to react an aliphatic primary alcohol having 6 to 30 carbon atoms with ethylene oxide to obtain an aliphatic primary alcohol having 6 to 30 carbon atoms. An object of the present invention is to provide a liquid detergent that has little odor in the liquid detergent composition when primary alcohol ethoxylate is used as a cleaning active ingredient of the liquid detergent, and also has very little odor due to change over time. .

(Means for Solving the Problems) The present invention provides a liquid detergent composition containing an aliphatic primary alcohol ethoxylate having 6 to 30 carbon atoms as a detergent active ingredient, which contains lactic acid and/or a lactate. Unneutralized aliphatic primary alcohol ethoxylate having 6 to 30 carbon atoms is obtained by reacting an aliphatic primary alcohol having 6 to 30 carbon atoms with ethylene oxide in the presence of an alkali catalyst. It is obtained by adding lactic acid and/or lactate to 30 aliphatic primary alcohol ethoxylate, or it is obtained by adding lactic acid and/or lactate to aliphatic primary alcohol ethoxylate having 6 to 30 carbon atoms. An unneutralized aliphatic primary alcohol ethoxylate having 6 to 30 carbon atoms obtained by reacting an aliphatic primary alcohol having 6 to 30 carbon atoms with ethylene oxide in the presence of an alkali catalyst. A liquid detergent composition obtained by adding lactic acid and/or lactate to an aliphatic primary alcohol ethoxylate having 6 to 30 carbon atoms from which the catalyst has been neutralized or from which the catalyst has been removed by mouth filtration. It is about things.

The lactic acid used in the present invention may be produced by either a fermentation method or a synthetic method, and the purity of the lactic acid is not particularly limited. It can also be used for

The milk M salts used in the present invention are alkali metal salts of lactic acid such as sodium lactate, potassium lactate, and lithium lactate, alkaline earth metal salts of lactic acid such as calcium lactate, magnesium lactate, and barium lactate, aluminum lactate, zinc lactate, and lactic acid. Examples include silver, copper lactate, iron lactate, manganese lactate, and ammonium lactate, with 1-lium lactate and potassium lactate being particularly preferred.

The amount of lactic acid and/or lactate used in the present invention is 5 to 0.001 parts by weight, preferably 1 to 0.05 parts by weight, per 100 parts by weight of aliphatic primary alcohol ethoxylate having 6 to 30 carbon atoms. Parts by weight. Upon addition, the p l-1 of the aqueous solution is preferably in the range of 4 to 9, preferably in the range of 5 to 7.

The method of adding lactic acid and/or lactate of the present invention involves reacting an aliphatic primary alcohol having 6 to 30 carbon atoms with ethylene oxide in the presence of an alkali catalyst such as sodium hydroxide, potassium hydroxide, and sodium alkoxide. A method of adding lactic acid to the unneutralized aliphatic primary alcohol ethoxylate having 6 to 30 carbon atoms obtained by the above method, or a method of removing the catalyst by a known method such as oral filtration.
There is a method of adding lactic acid to 0 aliphatic primary alcohol ethoxylate. To add lactic acid and/or lactate, add lactic acid and/or lactate as is or as a solution to aliphatic primary alcohol ethoxylate having 6 to 30 carbon atoms, stir for about 30 minutes, and dissolve completely. is preferred.

Fat-walking primary alkaline alcohol having 6 to 30 carbon atoms used in the present invention - Saturated and/or unsaturated aliphatic primary alcohol having 6 to 30 carbon atoms, such as coconut oil, ] The first oil obtained by hydrogenating vegetable oil such as Copput oil
Examples include primary alcohols obtained by hydrogenating animal oils such as beef tallow, whale oil, and wool oil, and primary alcohols obtained by hydrogenating organic acids such as stearic acid and oleic acid. In addition, Ziegler alkyl having an even number of carbon atoms is obtained by polymerization using a Ziegler catalyst and oxidation from ethylene. Commercially available products include the product name [Δlf] manufactured by Continental Oil Company.

There is n1cJ. There is also an oxo alcohol obtained by reducing an α-olefin or an internal olefin, carbon monoxide, and hydrogen in the presence of a cobalt carbonyl catalyst with hydrogen through an oxo reaction to form an oxo aldehyde.

Commercially available products include ``Dopanol@[and Neodol 0'' manufactured by 3hel1 Co., Ltd., and [Axo] manufactured by Ichisan Kagaku Co., Ltd.
-Ru 01, Mitsubishi Kasei Co., Ltd. [Dia Doll@-1 is available.

The aliphatic primary alkyl ethoxylate having 6 to 30 carbon atoms used in the present invention is a combination of the above-mentioned aliphatic primary alcohol having 6 to 30 carbon atoms, sodium hydroxide, potassium hydroxide, helium alkoxide, etc. Examples include those obtained by addition reaction of ethylene oxide in the presence of an alkali catalyst, or an acidic catalyst such as boron trifluoride, boron trifluoride, antimony pentachloride, or tin tetrachloride. The number of moles of ethylene oxide added is not particularly limited, but is usually in the range of 0.1 to 100 moles on average, particularly,
A range of 1 to 50 moles is practical.

In the liquid detergent composition containing the C6-30 aliphatic primary alcohol ethoxylate of the present invention as a cleaning active ingredient, the C6-30 aliphatic primary alcohol ethoxylate containing lactic acid and/or lactate is preferably In addition to alcohol ethoxylates, various additives are added depending on various uses, such as activators, hydrotropes, foaming agents, foam stabilizers,
By combining anti-foaming agents, thickeners, low viscosity agents, builders, anti-recontamination agents, bleaching agents, fragrances, optical brighteners, perfumes, optical brighteners, dye brighteners, etc., extremely good results can be obtained. It was found that a liquid detergent composition with good performance could be obtained, and the present invention was completed.

In the liquid detergent composition containing an aliphatic primary alcohol ethoxylate having 6 to 3 carbon atoms as a cleaning active ingredient of the present invention, the liquid cleaning composition contains lactic acid and/or lactate having 6 to 3 carbon atoms. The content of the aliphatic primary alcohol ethoxylate in the liquid cleaning composition is preferably 1 to 90% by weight.

Characteristics of the liquid detergent composition of the present invention include alkylbenzene sulfonic acid salts and alkyl ether carboxylic acids as effective active agents for producing foaming, manufacturing method, synergistic effect of cleaning, moisturizing effect, and prevention of rough hands. salts, fatty acid soaps, α-olefin sulfonates, higher al-1-
alkyl ether sulfate salts, alkyl ether sulfates, fatty acid alkylolamide sulfate ester salts, alkylnityl phosphate J ster salts, al-4-ru phosphate ester salts, N-acylmethyltaurine, N-acylamino acid salts, acylated peptides , alkyl alkaturamites, aliphatic amine salts, aliphatic quaternary ammonium salts, benzalkonium salts, imidazolinium salts, carbo-4-nidibetaine type, aminocarboxylic acid salts, imidazolinium betaines, alkyl amine oxides kind,
0 to 3 of one or a mixture of two or more of polyoxyethylene alkylamines, fatty acid alkanolamides, etc.
It is preferable to add 0% of the booth.

In addition, solubilizers (hydrotropes), which are essential and uneconomical for liquid detergents, include lower alcohols, ethylene glycols, propylene glycols, glycerin, cellosolves, ethanolamines, and toluene sulfonates. , xylene sulfephon I1m, and a mixture of two or more selected from urea in an amount of 0 to 10% by weight.
Can be used.

As the viscosity modifier, inorganic salts such as sodium chloride, potassium chloride, magnesium chloride, sodium sulfate,
One or a mixture of two or more selected from sodium carbonate and potassium birophosphate can be used in an amount of 0 to 5% by weight.

The remainder is water, with deionized water or distilled water being particularly preferred.

Note that preservatives, bactericides, etc. may be added to prevent spoilage. Furthermore, additives such as builders, anti-restaining agents, bleaching agents, fluorescent agents, coloring agents, fragrances, antioxidant II-agents, etc. can also be used.

(Function) Lactic acid and/or lactate is added to the aliphatic primary alcohol ethoxylate having 6 to 30 carbon atoms obtained by reacting an aliphatic primary alcohol having 6 to 30 carbon atoms with ethylene oxide. As a result, it was found that when this was used as a base material for a liquid detergent, a high-quality liquid detergent with very little change in odor over time could be obtained.

(Example) Hereinafter, embodiments of the present invention will be specifically illustrated and explained by giving examples. The invention is not limited to the following embodiments.

In the examples, there are rows (V) for each test method as follows.

(1) Odorless distilled water 10 treated with activated carbon for odor test 110.1-
0d was added and the temperature was 50°C, and the evaluation was made by a paired comparison method with a standard product. The odor was judged as follows.

5: Same as the standard product 4: Slightly more odor than the standard product 3: Slightly more odor than the standard product 2: Noticeably more odor than the standard product 1: Standard product with a much stronger odor than the standard product (A> Example 1 ~3 and Comparative Examples 1 to 3,
The cleaning agent of Example 1, which had not changed over time, was used as a standard product.

(B) The cleaning agent of Example 4, which did not change over time compared to Examples 4 to 6 and Comparative Examples 4 to 6, was used as a standard product.

(2) Cleaning power test (Method A) 10×10 c
Put 3 pieces of artificially contaminated cloth (65% polyester, 35% cotton) into a turbotometer (rotation speed: 10,100p).
Washed with p.

(1) Cleaning conditions Cleaning agent m Kame: 0.067wt% water used
: Tap water temperature = 25℃ Washing time : Rinse for 5 minutes : Run water for 5 minutes Stain composition of artificially contaminated cloth A Organic substances (wt%) Myristic acid 16.7 Oleic acid 16.7 Tristearin 16.7 Trio rain
16.7 cholesterol
8.8 Cholesterol stearate
2.2 Paraffin wax (m, p, 50-52°C) 11.
1 Squalene 11.1B Inorganic clay (Kanto loam passed through 250 meshes) C Carbon Carbon black (passed through 250 meshes) Organic matter 49
．． 75% by weight, inorganic 49.75% by weight, carbon 0.
5% by weight was mixed to form a stain, and a white cloth manufactured by LII was contaminated so that the reflectance was 45%±2%.

(3) Calculating the cleaning rate of artificially contaminated cloth The reflectance at 530 mμ of the original cloth before cleaning and the artificially contaminated cloth before and after cleaning was measured using a reflectance meter (Model 5PR-3 manufactured by Hiranuma Sangyo), and the cleaning rate was calculated using the following formula. (%) was calculated.

Cleaning rate (%) - 100X (Method B) Six model dirty glass pieces were washed using a Rinat improved detergency tester and the detergency was measured in accordance with JIS-3370-4.9.

(B) Cleaning conditions Cleaning agent: 0.15% by weight Dirt amount: 0.163or/6 glass plates JIS R3703 No. 2 water used
3°11H Water washing temperature 30°C Rotation speed 25 rpm Washing time 3 minutes Rinse time 1 minute Liquid volume 700ml/pot (ro) Model stain creation Mixed oil of beef tallow and soybean oil (1:1) 2oO, monoolefin 0.25o , Oil Red 0.10 and Chloroform 6
Prepare a sludge bath by dissolving it in 0ml.

Glass plates are immersed one by one in a contamination bath heated to 25±1°C for 1 to 2 seconds to a depth of about 55 mm to adhere dirt, and then taken out.

2 in a constant temperature and humidity chamber at a temperature of 25 ± 1°C and a humidity of 60 ± 5%.
It was air-dried for 4 hours, weighed, and immediately used for the detergency test.

(c) Calculation of cleaning power The weight of the six glass plates before and after contamination and after cleaning,
It was air-dried for 6 hours in a constant mixing and constant humidity tank, the weight was measured, and the cleaning rate (%) was calculated using the following formula.

Cleaning rate (%) - 100x Synthetic product 1 Capacity 1000 m, 5 stainless steel reactors with carbon numbers 12~
13 Primary alcohol with an average molecular weight of 19/l (manufactured by Nissan Kagaku Net 1, trade name, Oxocol 0) 1830, J thorium hydroxide 0.6o as a catalyst, ethylene oxide 417
111,150° C. and a pressure of 6.0 Kg/ciG. To the obtained primary alcohol adduct with an average of 10 moles of ethylene oxide, 2.8% by weight of a 50% by weight lactic acid aqueous solution was added.
0 was added and stirred thoroughly to obtain a synthetic product-1.

Comparative synthetic product 1 Capacity 1000mj! Stainless steel reactor with 12 or more carbon atoms
13 A primary alcohol with an average molecular weight of 194 (manufactured by Ichisan Kagaku Co., Ltd., trade name, Oxocol 0) 1830, 0.6 G of sodium hydroxide as a catalyst, and 417 q of dylene oxide were charged at 111,150° C. Pressure 6, 0 Kg/ci
Reacted with G. Vinegar Vi0.9o was added to the obtained adduct of primary alcohol with 10 moles of ethylene oxide on average, and the mixture was thoroughly stirred to obtain Comparative Synthesis Product-1.

Synthetic product 2 Capacity 10100O! Stainless steel reactor with 11 or more carbon atoms
15 average molecular ω202 primary alcohol (Mitsubishi Kasei'
Manufactured by 41, trade name, Diadol @) 188G, sodium hydroxide 0.6CJ as catalyst, ethylene oxide 41
2o was charged and reacted at a temperature of 150° C. and a pressure of 6.0 at a rate of 9/ciG. To the obtained primary alcohol adduct with an average of 10 moles of ethylene oxide, 2.8% by weight of a 50% by weight lactic acid aqueous solution was added.
0 was added and stirred thoroughly to obtain a synthetic product-2.

Comparative synthetic product 2 Capacity 1000mj! Stainless steel reactor with 11 or more carbon atoms
15 primary alcohol with an average molecular weight of 202 (manufactured by Mitsubishi Kasei Co., Ltd., trade name, Diadol 0) 1880, and 412 g of sodium hydroxide 0.601 polyethylene oxide as a catalyst, and heated to 9/cdG at a temperature of 150°C and a pressure of 6.0. I reacted with 0.90% acetic acid was added to the obtained adduct of primary alcohol with 10 moles of ethylene oxide on average, and the mixture was thoroughly stirred to obtain Comparative Synthesis Product-2.

Synthetic product 3 Capacity 1000rrl stainless steel reactor with carbon number 12~
Primary alcohol with an average molecular weight of 13 and 194 (3hell
Manufactured by NE1, trade name, Dopanol [phase]) 183Q1 Sodium hydroxide 0.60, ethylene oxide 41 as catalyst
70 was charged and reacted with 9/CdG at a temperature of 150° C. and a pressure of 6.0. To the obtained primary alcohol adduct with an average of 10 moles of ethylene oxide, 2.8 g of a 50-fold open aqueous lactic acid solution was added.
0 was added and stirred well to obtain a synthetic product-3.

Comparative synthetic product 3 Capacity 100100O stainless steel reactor with carbon number 12~
13 Primary alcohol with an average molecular weight of 194 (SheII
Dopanol 183q (manufactured by Dopanol, trade name), 0.60% sodium hydroxide and 4170% ethylene oxide as catalysts were charged, and reacted with mfm [150°C, pressure 6.0, 9/ciG. 0.90% of acetic acid was added to the obtained adduct of primary al]-ol with ethylene oxide on average of 10 mol, and the mixture was stirred to obtain Comparative Synthesis Product-3.

Synthetic product 4 Capacity 10 (') (') m1 Carbon number 12-16 obtained by hydrogenating coconut oil in a stainless steel reactor 19
7 primary alcohol 185G, hydroxide as a catalyst
~0.6q of lithium and 415O of ethylene oxide were introduced, and the reaction was carried out at a temperature of 150°C and a pressure of 6.0Kfl/ciG. To the obtained adduct of primary coconut oil alcohol with 10 moles of ethylene oxide, 2.80% of a 50% by weight aqueous lactic acid solution was added and stirred thoroughly to obtain a synthetic product-4.

Comparative synthetic product 4 No. 1 with a carbon number of 12 to 16 and an average molecular weight of 197 obtained by hydrogenating coconut oil in a stainless steel reactor with a capacity of 1000 m1.
Grade coconut oil alcohol 1850, sodium hydroxide 0.6 (] as a catalyst, I tyrene oxide 415q were added,
The reaction was carried out at 1150°C and pressure 6°0 K9/c#iG. 0.90% acetic acid was added to the obtained 10 mole ethylene oxide adduct of primary coconut oil alcohol, and the mixture was thoroughly stirred to obtain Comparative Synthesis Product-4.

Synthetic product 5 Capacity 10100O! Stainless steel reactor with 12 or more carbon atoms
13 Primary alcohol with an average molecular weight of 194 (manufactured by Nissan Chemical Co., Ltd., trade name, Oxocol 0) 1830, sodium hydroxide 0.60 as a catalyst, and ethylene oxide 4170 were prepared, IIFlt 150℃ pressure 6.0 K9/c
I reacted with iG. Kyoward 600R was added to the obtained primary alcohol adduct with an average of 10 moles of ethylene oxide.
After adding UPS12o and stirring at 80°C for 30 minutes, the mixture was transferred to a filter pre-coated with diatomaceous earth to remove the keyword 600BUPS adsorbed with the catalyst. Next, 3.50% of a 50% by weight aqueous sodium lactate solution was added to the passed ethylene oxide adduct with an average of 10 moles, and the mixture was thoroughly stirred to obtain a synthetic product-5.

Comparative synthetic product 5 Volume 11000mj! Stainless steel reactor with 12 or more carbon atoms
A primary alcohol of 13 average molecular weight 194 (manufactured by Nissan Chemical Co., Ltd., trade name, Oxocol) 1830, sodium hydroxide 0.60 as a catalyst, and ethylene oxide 417q were charged at 111150°C under a pressure of 6. Reaction was performed with OK9/ciG. Kyoward 600BUPS12G was added to the obtained primary alcohol adduct with 10 moles of ethylene oxide on average.
After adding and stirring at 80℃ for 30 minutes, it was transferred to a filter pre-coated with diaphragm, and the catalyst-adsorbed Kyoward 6
Comparative synthetic product-5 was obtained by removing 00BUPS.

Examples 1 to 5 Liquid detergent compositions containing lactic acid and/or lactate-containing aliphatic primary alcohol toxylate having 6 to 30 carbon atoms as the main detergent active ingredient were prepared and tested for odor and detergency. The results were as shown in Table 1.

Comparative Examples 1 to 5 Liquid detergent compositions containing the aliphatic cylindrical primary alcohol ethoxylates having 6 to 30 carbon atoms obtained in Comparative Synthetic Products 1 to 5 as the main detergent active ingredient were prepared, and the odor and detergency were A test was conducted. The results were as shown in Table 2.

(Effects of the Invention) In carrying out the present invention, compared to conventional aliphatic primary alkyl T toxylates having 3 to 30 carbon atoms, the 30 aliphatic 1st
A liquid detergent composition containing grade alcohol toxylate as a detergent active ingredient exhibits the effect of extremely reducing odor change over time when used as a base material for a liquid detergent, resulting in a high-quality liquid detergent. It is.

Claims (7)

[Claims] (1) In a liquid detergent composition containing an aliphatic primary alcohol ethoxylate having 6 to 30 carbon atoms as a cleaning active ingredient, the cleaning active ingredient has 6 to 30 carbon atoms and contains lactic acid and/or lactate. A liquid detergent composition characterized in that it is an aliphatic primary alcohol ethoxylate. (2) 6 or more carbon atoms containing lactic acid and/or lactate
30 aliphatic primary alcohol ethoxylate is an unneutralized aliphatic alcohol having 6 to 30 carbon atoms obtained by reacting an aliphatic primary alcohol having 6 to 30 carbon atoms and ethylene oxide in the presence of an alkali catalyst. The liquid cleaning composition according to claim 1, which is obtained by adding lactic acid as a neutralizing agent to primary alcohol ethoxylate. (3) 6 or more carbon atoms containing lactic acid and/or lactate
30 aliphatic primary alcohol ethoxylate is an unneutralized aliphatic alcohol having 6 to 30 carbon atoms obtained by reacting an aliphatic primary alcohol having 6 to 30 carbon atoms and ethylene oxide in the presence of an alkali catalyst. Obtained by adding lactic acid and/or lactate to aliphatic primary alcohol ethoxylate having 6 to 30 carbon atoms after neutralizing the catalyst of primary alcohol ethoxylate or removing the catalyst by filtration. The liquid cleaning composition according to claim 1. (4) The liquid cleaning composition according to claim 1, wherein the aliphatic primary alcohol ethoxylate having 6 to 30 carbon atoms is a saturated aliphatic primary alcohol ethoxylate having 6 to 30 carbon atoms. (5) The liquid cleaning composition according to claim 1, wherein the lactate is an alkali metal salt of lactic acid. (6) The liquid cleaning composition according to claim 1, wherein the lactate is sodium lactate. (7) Claim 1 in which the lactate is potassium lactate
The liquid cleaning composition described in Section 1.