JPH0333760B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a detergent composition whose main ingredient is a surfactant made of a higher fatty acid derivative made from vegetable oils and fats. This invention relates to a detergent composition that causes no irritation to the skin and has an excellent effect on preventing rough skin. Recently, cleaning compositions containing various synthetic surfactants, so-called synthetic detergents, are causing health damage, especially
Damages such as rough skin and eczema caused by irritation to the skin and mucous membranes are extremely painful for users. According to a recent hospital monitor survey on health damage conducted by the Ministry of Health and Welfare, damage caused by synthetic detergents was the most common, with a high rate of 30.7%. The breakdown of symptoms caused by synthetic detergents was 27.2% allergic contact dermatitis, 25.0% eczema (KTPP type), where the surface of the hands loses oil and becomes rough.
Eczema other than the KTPP type accounts for 18.6%, and these symptoms are collectively referred to as housewife's eczema, which is now a great source of pain for housewives and people with knowledge of synthetic detergents, and improvements are needed. This is a place that is highly desired. This is because synthetic surfactants, which are components of synthetic detergents, have a cleaning effect, a degreasing effect, a swelling and denaturing effect on keratin proteins, and an effect to promote transdermal absorption of ingredients on the skin and mucous membranes. This causes inflammation of the skin and mucous membranes, causing so-called housewife's eczema. In the past, various proposals have been made to suppress or alleviate such eczema among housewives, such as improving the surfactant itself and adding anti-inflammatory agents, but no fully satisfactory product has yet been obtained. Furthermore, conventional synthetic detergents contain builders as cleaning accelerators or cleaning aids, but phosphates such as sodium tripolyphosphate, which is said to have the most effective builder effect, are used in lakes and marshes. This leads to eutrophication, which has become a major social problem. Eutrophication is when the water in lakes and inland seas becomes rich in nutrients for aquatic plants, such as phosphorus and nitrogen, resulting in abnormal growth of plankton and algae in the water. As this eutrophication progresses, the types and amounts of plants and animals change, causing a change in the balance of the ecosystem. Even in Japan, it is still fresh in our minds that red tide and abnormal algae blooms are often reported in areas such as the Seto Inland Sea, Lake Biwa, and Lake Kasumigaura. The mechanism is complex and has not yet been scientifically elucidated, but eutrophication is said to occur when phosphorus and nitrogen reach certain levels. Phosphorus, the causative agent, is contained in various things such as human waste and fertilizers, but there is no doubt that the phosphorus contained in synthetic detergents is also a contributing factor. Similarly, sodium citrate, which is often used as a component of conventional builders, is highly alkaline and makes the detergent itself alkaline, which is also undesirable as it contributes to rough hands. Against this social background, various countries have been promoting the development of alternative builders to phosphates, and there has been a call for phosphorus-free detergents in order to reduce the phosphate content in detergents without weakening their cleaning power. Zeolite has recently attracted attention as an alternative builder. However, although zeolite is an excellent builder that can replace phosphates and has contributed to solving the pollution problem, it has not yet fully solved the drawbacks of synthetic detergents in terms of protecting the skin from rough skin. I haven't reached it yet. The present invention does not irritate the skin at all, has excellent deodorizing power, sterilizing power, and antibacterial power, and has an excellent effect on preventing rough skin.Moreover, it has sufficient cleaning power without causing any pollution when used. A builder containing brown sugar and citric acid as essential components in a detergent composition whose main component is a surfactant made of a derivative of a higher fatty acid made from vegetable oils and fats. , as well as betaine. The present invention uses phosphates such as sodium tripolyphosphate, which have been conventionally used as builders,
It does not use sodium citrate, but instead uses a builder that contains brown sugar and citric acid as essential ingredients, and it is a surfactant made of this builder and betaine, a derivative of higher fatty acids made from vegetable fats and oils. By adding it to a cleaning agent, a cleaning composition having the above-mentioned excellent synergistic effect can be obtained. Brown sugar, also known as brown sugar, is a type of mitsucrose containing crude black lumps of sugar, and although it looks unsightly, it is rich in iron, calcium, and other minerals. It has been known for a long time that brown sugar was used in small amounts as an ingredient in cosmetic soaps, called brown sugar soap. However, in order to obtain a sufficient skin protection effect, it is necessary to increase the amount of compounding, and if the amount of compounding is increased, the cleansing power decreases. As a result of the development of irritation-reducing agents, it has become possible to produce cosmetic soaps that are less irritating, so cosmetic soaps that contain brown sugar are now rare. Citric acid is

It is a water-soluble crystal represented by the formula and is usually used as an acidulant additive for fruit juices and soft drinks. Citric acid does not exhibit strong alkalinity like sodium citrate, so it is suitable as a compounding agent for detergents that need to be as neutral as possible. By adding betaine, cleaning power, deodorizing power,
It can exhibit the excellent effect of synergistically increasing bactericidal power, antibacterial power, and skin protective action. The third component, betaine, includes alkyldimethylbetaine, methyl alkylaminopropionate, alkyldiaminoethylglycine hydrochloride, etc.; Betaine is most preferably used. Betaine is an amphoteric active agent that has very weak detergency but has bactericidal power, and is therefore known to be used as an additive in detergents. However, the addition of betaine alone is not sufficient for the sterilizing power required for kitchen detergents, etc., and in order to obtain sufficient sterilizing power, the amount of betaine added must naturally be increased. The problem was that the cleaning power of the product was reduced. According to the present invention, by using betaine in combination with a builder whose essential components are brown sugar and citric acid as described above, it is possible to simultaneously impart excellent bactericidal power and a protective effect on the skin with a small amount. The effect of combined use is synergistic and cannot be predicted from the effect when each additive is added alone. As a result of many years of research into non-polluting detergents, the present inventor used a surfactant consisting of a higher fatty acid derivative made from vegetable oil as a surfactant, and added brown sugar and citric acid to this surfactant. By adding betaine and a builder containing acid as an essential component, a cleanser that is non-polluting and synergistically superior in detergency, sterilizing power, antibacterial power, and skin protection effect can be obtained. This discovery led to the present invention. Among surfactants made from derivatives of higher fatty acids made from vegetable oils, those derived from coconut oil, such as lauryl alcohol sulfate and/or lauryl diethanolamide, have poor detergency and skin irritation. It is suitable because there is no Surfactants obtained from fats and oils are mainly produced by a saponification salting out method or a neutralization method. The detergent composition of the present invention is most suitable as a kitchen detergent, but it can also be used as a liquid sterilizing detergent for kitchens and washrooms, and it can also be used as a jelly by adding a gelling solvent. It can also be put to use. The blending ratio of each component of the cleaning agent of the present invention is such that the total amount of surfactant consisting of a higher fatty acid derivative made from vegetable oil and betaine is 15% by weight of the composition.
From the viewpoint of cleaning power, it is preferable that the amount is more than 35% by weight when the detergent is in liquid form, and about 50% by weight when it is in jelly form, although there is no particular upper limit. In addition, the builder ingredients include 0.5 to 3% by weight of brown sugar (based on the entire composition) and 0.1 to 1% of citric acid.
Preferably a range of % by weight, their total amount being 0.8
A content of 4% to 4% by weight is sufficient to achieve the purpose. In addition, the blending amount of betaine in a surfactant made of a higher fatty acid derivative made from vegetable oil is 1 to 4 parts of the surfactant.
If the percentage of betaine is higher than that, the cleaning power of the detergent will decrease, and if it is less, sufficient sterilizing effect will not be obtained. Example Cleaning compositions (liquid) with different formulations were prepared as follows. Formulation example 1 (invention) (wt%, same hereinafter) Lauryl alcohol sulfate ester ("LP-35",
NICCA CHEMICAL CO., LTD. (trade name) 10% Lauryl diethanolamide ("Larmin D", NICCA CHEMICAL CO., LTD. trade name) 2.8% Lauryl dimethyl betaine 3.5% Sodium bicarbonate 1% Citric acid 1% Brown sugar 1.8% Pearlizing agent 1% Silica sand 1% Silica 1% Water Remaining amount combination example 2 (invention) Lauryl alcohol sulfate (LP-35)
18% Lauryl dimethyl betaine 6% Citric acid 1.5% Brown sugar 1.5% Silica 1% Water Remaining amount combination example 3 (comparative example) Sodium dotecylbenzenesulfonate 19% Lauryl (ethoxy) ₃ - Sodium sulfate 4% Sodium citrate 1 % Brown sugar 3% Silica 1% Water Remaining amount combination example 4 (comparative example) Lauryl alcohol sulfate (LP35)
18% Lauryl dimethyl betaine 6% Sodium citrate 2% Silica 1% Water Remaining amount combination example 5 (comparative example) Lauryl alcohol sulfate (LP35)
20% Sodium bicarbonate 1% Citric acid 2% Silica 1% Water Remaining amount combination example 6 (comparative example) Lauryl alcohol sulfate (LP35)
20% Sodium bicarbonate 1.5% Sodium citrate 1.5% Brown sugar 2.5% Silica 1% Water Remaining amount a) Test for skin protection effect Four housewives (total 24 people) were given each of the above formulation examples 1 to 6 of the cleansers. was used under the following conditions, and the results are shown in Table 1. Test conditions: On a 4 x 8 x 15 cm sponge with a recess of 1.5 cm in diameter and approximately 2 mm deep on the center surface, drop an amount of cleaning agent to almost cover the recess, and add about 3 oz of hot water (approx. The product was used for 10 minutes at 40℃) to wash dishes, etc., and was used 5 times a day at 2-hour intervals, and a questionnaire survey was conducted on the feeling of use every 5 days. In addition, all of the detergents showed sufficient cleaning power as a detergent for tableware.

[Table] Regarding Formulation Examples 1 and 2, there were many reports that the skin became smoother after use. b) Test for sterilization and antibacterial properties (1) Tray made of expanded polystyrene sheet (10x
Prepare 12 pieces (18cm). (2) Decayed fish internal organs were placed on each tray for 3 hours so that about 80% of the bottom of the tray was covered. (3) Prepare 12 plastic washing tubs used in general households, and fill them with 3 cups of hot water at about 40℃.
and 3 c.c. of each of the above-mentioned formulation examples 1 to 6 were added to prepare two cleaning liquids for each cleaning agent. (4) The cleaning solution was thoroughly stirred, the tray was immersed in it, and the tray was washed with a sponge. (5) After washing with water, it was dried for 30 minutes in a constant temperature bath at 60°C. (6) Samples collected from five locations on the dry tray surface were cultured on agar in a shear dish (20°C, humidity 90%, 48 hours), and the culture status of the bacteria was observed, as shown in Table 2. −: No bacteria occurred +: Bacteria occurred in one place ++: Bacteria occurred in two or more places

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Claims (1)

[Scope of Claims] 1. A detergent composition whose main component is a surfactant made of a higher fatty acid derivative made from vegetable oils and fats, and 0.5 to 3% by weight of brown sugar and 0.1% of citric acid.
A cleaning composition characterized by adding a builder containing 1 to 1% by weight of betaine as an essential component. 2. The cleaning composition according to claim 1, wherein the vegetable oil is coconut oil. 3. The total amount of the surfactant consisting of the higher fatty acid derivative and betaine is 15% by weight based on the total composition.
The cleaning composition according to claim 1, wherein the cleaning composition is more than