JPH0753879B2 - Liquid detergent composition for clothing - Google Patents

Description

TECHNICAL FIELD The present invention relates to a liquid detergent composition for clothes. More specifically, the present invention relates to a liquid detergent composition for clothes, which contains potassium soap of aliphatic unsaturated fatty acid as a main component and has excellent detergency and high stability at low temperature.

[Prior art] Soap-based detergents have been widely used as powdered soaps and solid soaps, but their solubility in cold water is low, scum easily occurs in mineral water, and after washing. There is a problem such as recontamination due to the generation of soap residue and its reattachment. Potassium soap may be used to increase solubility, and liquid detergents based on potassium soap of coconut fatty acid have been commercialized [“Composite laundry soap” (made by Corp.), “Kitchen soap”). (Made by Daiei)]. A liquid transparent soap composition for hand-washing and face-washing which contains potash of lauric acid, myristic acid, oleic acid, alkanolamide and potassium salts, and has improved foaming power and stability at low temperature (JP-A-60-177100). Is proposed. In addition, a method of adding alcohol such as ethanol or ethylene glycol to maintain stability at low temperatures is widely used.

Further, in order to improve the dispersibility of the generated scum, a method using various scum dispersants has been proposed (for example, “Seminar on Soap Modifier (LSDA)”, Japan Soap and Detergent Industry Association, Showa 55). Published April 1st).

[Object of the Invention]

However, most soaps used in liquid detergents for washing on the market are potassium soaps of coconut oil fatty acid, and some potassium soaps such as oleic acid are used, but they are used in large amounts. Since the low temperature stability in a liquid state deteriorates and soap crystals are deposited, a liquid detergent containing potassium soap of unsaturated fatty acid such as oleic acid as a main component has not been obtained. In addition, conventionally used soaps mainly composed of coconut oil fatty acids have low detergency, and the detergency is extremely insufficient particularly for use in washing clothes, and they are not suitable for washing clothes.

Further, JP-A-60-177100 is intended for hand-washing and washing, and is intended to improve foaming power and stability at low temperatures. However, since a large amount of saturated acid potassium soap is used, it does not exceed -5 ° C. It has the drawback of poor low temperature stability and poor solubility in water at low temperatures.

In addition, a large amount of alcohols is used in order to obtain a stable liquid state at low temperature, but there are problems in that the foaming power is suppressed, and the odor and flammability are high.

As a result of an examination focusing on the above problems, potassium soap of unsaturated fatty acid such as oleic acid is used as a main component, a builder and a scum dispersant are added thereto, and it is extremely stable at low temperature.
In addition, a liquid detergent having high detergency and excellent scum dispersibility has been produced.

[Outline of Invention]

The present invention is a liquid detergent composition for clothes using potash soap containing an aliphatic unsaturated fatty acid as a main component, and the content thereof is a liquid detergent composition based on potash of fatty acid and having a total carbon number of 16 ~ 24 Potassium Soaps of Aliphatic Unsaturated Fatty Acids 10
-40% by weight, an adduct of fatty acid monoethanolamide having 10 to 22 carbon atoms and 1 to 20 mol of ethylene oxide added 4 to 4
A liquid detergent composition for clothing, comprising 20% by weight, 1 to 6% by weight of fatty acid diethanolamide having 10 to 24 carbon atoms, and 1 to 13% by weight of potassium carbonate.

The present invention is based on a potassium soap of an aliphatic unsaturated fatty acid, and by adding the above-mentioned ethylene oxide adduct of fatty acid ethanolamide and fatty acid diethanolamide and potassium carbonate, to clothes having excellent low temperature stability and washability. A liquid detergent for washing is obtained. By using an ethylene oxide adduct of fatty acid ethanolamide and fatty acid diethanolamide in combination, a liquid detergent having excellent transparency and low temperature stability is obtained. is there.

Potassium soap of aliphatic unsaturated fatty acids having a total carbon number of 16 to 24 used in the present invention, oleic acid as a fatty acid constituting the triglyceride, unsaturated fatty acids such as linoleic acid as a main component, mainly vegetable oils and fats as a raw material Obtained from fatty acids. Examples of vegetable oils and fats used here include safflower oil, rice bran oil, kapok oil, peanut oil, sunflower oil, soybean oil, rapeseed oil, fractionated liquid palm oil and the like.

Coconut oil can be used as an oil and fat other than the above, but it cannot be used in a large amount.

Fatty acids obtained by decomposing the above fats and oils are selected and mixed according to the purpose, and it is preferable to use oleic acid as the first main component, and the oleic acid content in the total fatty acids is at least 30% by weight, It is preferably 50% by weight or more. After oleic acid, linoleic acid is preferable as an unsaturated fatty acid, and when oleic acid and linoleic acid are contained, the total amount of both is preferably at least 65% by weight. Usually, what is commercially available as distilled oleic acid (oleic acid content of 80% or more) is most suitable for the present invention. A polyunsaturated fatty acid such as linolenic acid may be used as the other fatty acid, but it is not preferable to contain a large amount of such fatty acid because it is easily oxidized and colored.

12 to 12 carbon atoms obtained as lauric acid or coconut fatty acid
The fatty acid containing 14 as the main component has excellent low-temperature stability next to unsaturated fatty acids and can be used as a mixture, but it cannot be used in a large amount because it has poor detergency.
It is preferably 35% by weight or less.

In the present invention, potassium soap of the above fatty acids is added to the composition.
It contains 10 to 40% by weight, but below 10% by weight,
Foaming power is low, and detergency is considerably inferior to commercial products. On the other hand, if it exceeds 40% by weight, the viscosity becomes so high that it cannot be measured, and it is difficult to use it as a liquid product.

Potassium soaps of these fatty acids are usually obtained by adding a fatty acid to an aqueous solution in which a predetermined amount of caustic potash is dissolved, and neutralizing it, but at the time of neutralization, a water softener (eg, "EDTA") is added. You can also do it.

Next, 1 to fatty acid monoethanolamide with total carbon number of 10-22
An adduct with 20 to 20 moles of ethylene oxide added (hereinafter referred to as "MEAD / EO adduct") is a fatty acid monoethanolamide obtained from monoethanolamine with a fatty acid having 12 to 18 carbon atoms and lauric acid. Examples include monoethanolamide, coconut fatty acid monoethanolamide, palmitic acid monoethanolamide, stearic acid monoethanolamide, oleic acid monoethanolamide, tallow fatty acid monoethanolamide, etc., and 1 mol of these fatty acid monoethanolamide is 1 mole. -20 mol of ethylene oxide is subjected to an addition reaction by a conventional method to obtain an adduct. The addition reaction is carried out in the presence of an alkaline catalyst such as caustic soda or caustic potash in the range of 120 to 180
It is obtained by addition reaction under pressure at ℃. The number of added moles is 1
20 mol is preferable, but 1 to 15 mol is more preferable. MEAD
The amount of EO adduct added is 4 to 20%, preferably 7 to
Although it was 18%, when the amount of the MEAD / EO adduct added was 4% or less, the viscosity of the product was extremely high and the viscosity could not be measured. Further, it has poor low-temperature stability, has a drawback that it becomes cloudy and solidifies near -10 ° C, and has a problem that foaming is low. Further, if the addition amount is 20% or more, the product may be separated, which causes a problem that the uniform state cannot be maintained.

Next, the fatty acid diethanolamide having a total carbon number of 10 to 24 (hereinafter referred to as "DEAD") is preferably a diethanolamide of a fatty acid having a total carbon number of 12 to 18, lauric acid diethanolamide, coconut fatty acid diethanolamide, palmitic acid diethanolamid. And stearic acid diethanolamide, oleic acid diethanolamide, tallow fatty acid diethanolamide and the like. The amount of DEAD added is 1-6%
However, if DEAD is 6% or more, separation occurs and a uniform product cannot be obtained.

Next, as potassium carbonate, commercially available powdery potassium carbonate is usually used. The addition amount is preferably 1 to 13% in the composition, more preferably 4 to 10%. If it is less than 1%, it is too small for increasing the concentration of potassium soap in the product, and at a low temperature (10 ° C. or less), the crystals of soap tend to break out, and a transparent and stable liquid state cannot be obtained. On the other hand, if it exceeds 13%, the balance of the cumulative solubility due to each composition is lost, the compositions are separated and separated into two layers, and a stable liquid state cannot be obtained. In addition to potassium carbonate, sodium silicate or potassium silicate may be added thereto for use.

Next, to describe the method for producing the liquid detergent composition in the present invention, first, the saponification value (SV) of the raw material fatty acid is accurately measured,
Calculate the required amount of caustic potash. 10-20% of the amount required for the kettle
Water (preferably ion-exchanged water), a prescribed amount of caustic potash and a water softener (eg EDTA) are charged, heated and dissolved,
Set to 90 ° C. The whole amount of raw material fatty acid is added to this and neutralized. After the neutralization, if the color of the potassium soap is poor, salt folding or decolorization is appropriately performed. After the completion of neutralization, the whole amount of potassium carbonate is charged and stirred uniformly, and then 75 to 80% of a required amount of water is added and stirred. Next, add MEAD / EO adduct, DEAD, remaining amount of water, and if necessary, ethyl alcohol, denatured alcohol, fragrance, etc.,
The product.

The liquid detergent composition of the present invention obtained as described above shows extremely high detergency when used for washing clothes made of cotton and synthetic fibers, and also as a kitchen detergent for washing dishes and for residential use. It shows excellent detergency when used.

The present invention will be described below with reference to examples.

〔Example〕

Liquid detergent compositions having the compositions of Examples 1 to 7 and Comparative Examples 1 to 7 shown in Table 1 were prepared, and the viscosity, low temperature stability, foaming power and detergency thereof were measured. The results are shown in Table 2. The manufacturing method will be described using Example 1.

Example 1 To 53 parts of ion-exchanged water, 3.4 parts of caustic potash and 0.1 part of EDTA were added,
Dissolve at 40 ℃. A mixed fatty acid of 12.3 parts of distilled oleic acid (80% oleic acid content) and 3.4 parts of coconut oil and fatty acid is added thereto to neutralize. Add 6.5 parts of potassium carbonate to it, 45
After stirring well at ~ 50 ° C, 2 parts of coconut oil fatty acid diethanolamide and coconut oil fatty acid monoethanolamide EO (7 mol)
Add 9 parts of the adduct, cool to 30-35 ° C. with stirring, then add 2 parts of ethanol, 0.2 parts of perfume and water to make a total of 100 parts and knead well to obtain a product.

In Table 1, the composition as potassium soap is shown. First
In addition to the composition shown in the table, a commercial product A (“liquid composite soap” (manufactured by Corp.)) was used as a comparative example, and the test was conducted. The results are shown in Table 2.

・ The test method was as follows.

i) Viscosity: Standard oil and fat analysis test method (2.3-9-71) (Japan Oil Chemistry Association test method) ii) Cooling test: Same as above Test method (2.3-8-71) iii) Foaming power: JIS K 3362 3.3 (6) iv) Detergency: JIS K 3303 5.7 [Effect of the invention] As described above, the present invention mainly uses potassium soap of aliphatic unsaturated fatty acid having 16 to 24 carbon atoms in total. A liquid detergent composition comprising, as a component, an ethylene oxide adduct of fatty acid monoethanolamide, fatty acid diethanolamide, potassium carbonate, etc., having a low viscosity at low temperature, maintaining a transparent liquid property, and having a low temperature in water. It dissolves easily even when used, and when it is used for washing clothes, it shows excellent detergency because it is based on soap,
The scum dispersibility is also good, and it has the effect of providing a cleaning agent that is well washed up.

Claims (1)

[Claims] 1. A liquid detergent composition based on potassium soap of fatty acid, wherein 10 to 40% by weight of potassium soap of aliphatic unsaturated fatty acid having 16 to 24 carbon atoms and fatty acid mono having 10 to 22 carbon atoms in total. It is characterized by containing 4 to 20% by weight of an adduct obtained by adding 1 to 20 mol of ethylene oxide to ethanolamide, 1 to 6% by weight of fatty acid diethanolamide having 10 to 24 carbon atoms and 1 to 13% by weight of potassium carbonate. A liquid detergent composition for clothing.