JPH10175847A - Hand soap composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a hand soap composition widely usable for ordinary household, automobile machine shop, printing plant, petrol station, capable of removing machine oil stain, grease stain, paint stain, etc., excellent in cleaning power and slight in skin irritation. SOLUTION: This hand soap composition contains 8.0-20.0wt.% one or more esters which are esters liquid at a normal temperature and useful as a plasticizer for acrylic resin, vinyl chloride resin, cellulosic resin, styrene resin, vinyl acetate, epoxy resin, phenol resin, etc., in an emulsified state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is capable of removing machine oil stains, grease stains, paint stains, etc., has excellent detergency, and can be provided as cosmetics with little skin irritation. The present invention relates to a hand soap composition for cleaning hands which can be widely used in automobile repair shops, printing shops, building sites handling paint, gas stations, and the like.

[0002]

2. Description of the Related Art Conventionally, in an automobile repair shop or the like, a detergent in which a paint solvent, gasoline, kerosene, or the like is dissolved to wash off paint, machine oil, grease, or the like, or a diatomaceous earth or the like impregnated with a surfactant is used. In this method, the physical polishing action is mainly washed off. These are unsuitable for hand washing because they are not cosmetics, but they were used with unspoken understanding because they are not for home use (for business use). The use of the former solvent elutes strongly into sebum and causes roughening, and the latter abrasive-based detergent causes rough irritation to the skin due to strong irritation to the skin due to frictional force during use. Is not enough. A penit stain remover hand soap as a cosmetic product was commercially available at the beginning of 1996. However, this is also a liquid composition containing an abrasive, and mainly has a polishing effect. It is stated that limonene (fragrance component) facilitates dissolution of paint and oil stains, but in actuality the detergency against paint stains is not so strong.

[0003]

Among the raw materials approved by the Ministry of Health and Welfare which can be used for cosmetics and which have the ability to dissolve paint, they can be roughly classified into water-soluble and water-insoluble solvents. Examples of the water-soluble solvent include glycol ethers and alcohols, methylpyrrolidone, acetone and the like. The performance of a water-soluble solvent is excellent at a high concentration, but the performance is extremely reduced by a slight decrease in the concentration. In the case of water-soluble solvents, most of them cannot exhibit the performance as a solvent unless they have a concentration of 75 to 80% by weight or more. Must also be considered. In addition, the addition amount of a surfactant or a hand-skin protecting component which is a cleaning component other than the solvent is limited. The surfactant to be added is dispersed and solubilized in water when the concentration of water drops sharply due to water during the rinsing stage after dissolving the paint stains and the paint stains cannot be dissolved and try to reattach to the hands. It is essential because it works to prevent it.

[0004] The present invention has been made in view of the above points, and it is possible to dissolve in a smaller amount than a water-soluble solvent by blending in an emulsified state using a plasticizer that is hardly soluble in water. An object of the present invention is to provide a hand soap composition which can have a good detergency, can be easily washed with water after removing dirt, and has little skin irritation.

[0005]

To achieve the above object, a hand soap composition according to the present invention comprises, in a detergent composition, dimethyl phthalate, diethyl phthalate, dibutyl phthalate, triacetylglyceryl, triethyl citrate. A liquid ester at room temperature, such as dimethyl adipate, diethyl adipate, diisobutyl adipate, and plasticizers such as acrylic resin, vinyl chloride resin, cellulose resin, styrene resin, vinyl acetate resin, epoxy resin, and phenol resin. One or two or more kinds of the esters selected from those used as (1) are contained in an emulsified state in an amount of 8.0 to 20.0% by weight.

[0006]

Embodiments of the present invention will be described below.

[0007] Dimethyl phthalate, diethyl phthalate, and the like are contained in the detergent composition of the hand soap composition of the present invention.
Esters such as dibutyl phthalate, triacetyl glyceryl, triethyl citrate, dimethyl adipate, diethyl adipate, and diisobutyl adipate are acrylic resins, vinyl chloride resins, cellulose resins, styrene resins, vinyl acetate resins, epoxy resins, The plasticizer is used as a plasticizer such as a phenolic resin. The plasticizer as used herein is an additive for blending into a plastic or its film to lose its original hardness and make it soft.

Specific embodiments of the cleaning action in the case of paint stains according to the invention, as well as other components, are described below. Originally, paint consists of a synthetic resin, pigment, and solvent, and is painted by curing and film formation after application.The principle of dissolving and removing the paint is to mix it with a plasticizer before curing and film formation. This means that the liquid is emulsified and removed with an emulsifier (cleaning agent) while maintaining a soft liquid state. In addition, the main ingredient of the present invention is less dissolving and irritating of sebum because it is an ester which is a plasticizer, and is also an emulsion, so that washing with water after removing dirt is easy,
An optimal hand soap can be provided. Triethyl citrate, triacetyl glyceryl and the like are also used as superfatting agents and as skin protective agents.

It is to be noted that the plasticizer of the present invention alone may be difficult or time-consuming to remove during or after the curing of a paint film. By doing so, cleaning can be performed in a short time due to the synergistic effect with the physical polishing action, and the cleaning power and the rinsing ability can be improved because the paint stains are also adsorbed. Of course, the present invention is primarily intended to remove the emulsification before the paint is cured and formed into a film, and the addition of the abrasive is an auxiliary and complementary one and also an emulsifier that penetrates the hand skin. Another object is to reduce the amount of detergent added to further reduce irritation.

As an abrasive, silicon dioxide, diatomaceous earth, bentonite, zeolite, talc, calcium carbonate, magnesium carbonate, polyethylene powder, nylon powder, etc. can be used. Although the power is increased, the skin irritation is increased. Therefore, based on the idea that the abrasive of the present invention is merely an auxiliary, use a polishing agent having a particle size of about 20 to 50 μm in consideration of irritation to the skin. I do. In addition, since the present invention is characterized by emulsifying and blending a poorly water-soluble plasticizer, secondary effects such as reduction of hand irritation when an abrasive is added can be obtained. That is, since the abrasive and the emulsified substance are mixed, the frictional resistance is greatly reduced, and there is almost no irritation to the hand, and the washability of the paint can be improved.

As the emulsifier, those usually used for esters and fats and oils, and nonionic activators represented by fatty acid monoglycerides, sorbitan esters, monoacyldecaglyceryls and polyoxyethylene alkyl ethers can be mainly used. It may be of an anionic type, a cationic type, or a zwitterionic type. Anionic surfactants, nonionic surfactants, and zwitterionic surfactants that can be used in hand soaps can be used as the cleaning agent. Furthermore, one or more kinds of organic and inorganic acids and alkalis as pH adjusters, sequestering agents, preservatives, antibacterial agents, skin protective agents, humectants, ultraviolet absorbers, pigments, fragrances, etc. are compounded. May be.

[0012]

EXAMPLES Examples of the present invention will be described below, and the cleaning effect and the degree of stimulation in each example will be described in detail. First, Table 1 below shows control data necessary for observing the cleaning effect of the present invention. Comparative Example 1 is a composition commonly used in an automobile repair shop at present and is commonly called pink soap, and has a relatively weak detergency against paint stains and grease stains, and a strong friction stimulus. In addition, the particle size of diatomaceous earth is 100-120 micrometers. Comparative Example 2 was mainly composed of a solvent (ethylene glycol monoethyl ether) having high water-soluble paint dissolving performance, and a solvent concentration of 70% by weight or more was required for dissolving the paint.
Even in this case, the grease is slightly stained and the contact stimulus to the skin increases. In Comparative Example 3, the ester of the present invention was not blended, and the detergency was weak as a whole, and the paint stain did not fall. The particle size of the diatomaceous earth is 20 to 50 μm, the particle size of the diatomaceous earth in each of the examples described below is the same, and the numerical values described are weight%, and are shown in Tables 2 and 3 described below. All the numerical values described also show% by weight. The raw material names (A to
N) is as follows. A: dimethyl phthalate, B: ethylene glycol monoethyl ether, C: polyoxyethylene (5) oleyl ether, D: polyoxyethylene (20) oleyl ether, E: polyoxyethylene (10) nonylphenyl ether, F: Coconut oil fatty acid diethanolamine, G: carboxyvinyl polymer,
H: diatomaceous earth, I: tap water, J: diisobutyl adipate, K: diisopropyl adipate, L: diethyl phthalate, M: dibutyl phthalate, N: triacetyl glyceryl. The performance (OT) described in each table is as follows. O: Paint dirt cleaning power, P: Grease dirt cleaning power, Q: Machine oil dirt cleaning power, R: Smoothness, S: Contact stimulation, T: Friction stimulation.

[Table 1]

The model contamination when the data of Table 1 above and Tables 2 and 3 shown below are taken is as follows. The paint stain is applied to the palm of the hand using a commercially available acrylic paint for a building and a paint for repairing a car to a size of about 5 cm in diameter, and then naturally dried at room temperature and room temperature for one hour. For machine oil stains, carbon black is added at a ratio of 0.01% to commercially available machine oil, mixed well, and then 0.5 g of this is applied to the palm of the hand. For grease contamination, carbon black is added to a commercially available grease at a rate of 0.01%, mixed well, and then 0.5 g of the grease is applied to a palm. Regarding the performance evaluation of the detergency, use a 3 ml hand soap on the palm of paint stains, brush with a toothbrush for a minimum of 1 minute, rinse off with running water, and clean the palm of machine oil stains and grease stains.
After rubbing with each other for 1 minute using a hand soap of 100 ml, the degree of dirt removal was visually observed with respect to those rinsed with running water, and classified into the following stages according to the degree of cleaning. ◎: Washed 90% or more, ○: Washed about 70-90%,
Δ: Washing about 50 to 70%, ×: Washing not more than 50%.

Regarding the performance evaluation of the contact stimulus, a hand soap was used in an amount of 0.2 g, and a 24-hour close patch test on the upper arm was performed by five women. The stimulus accompanied by swelling and redness was +3 points, and redness was obtained. And stimulation +2
Points and stimuli alone were +1 points, and no stimuli were 0 points. …: Almost no stimulation at 0 to +2 points, Δ: stimulation at +3 to +6 points, x: strong stimulation at +7 points or more.

Comparative Example 1
A hand soap of popular pink soap is used as a comparative control, and the frictional stimulus when 3 g of the hand soap is strongly rubbed against the back of the hand for 1 minute is used as a reference stimulus. did. ◎: Clearly small, ○: Slightly small, Δ: Equivalent, ×: Many.

The following Table 2 shows the performance data of Examples 1 to 5 containing dimethyl phthalate. The data shows the proper range of the amount of the ester of the present invention. I have. That is, the effect starts to appear when the dimethyl phthalate content is 6.0% by weight (Example 1),
At 8.0% by weight (Example 2), the effect becomes remarkable. However, since dimethyl phthalate is an ester, it exceeds 20.0% by weight (Example 4) and is 25.0% by weight.
In the case of (Example 5), the oil itself becomes oil stains, making it difficult for machine oil and grease to fall off, as well as poor rinsing properties and a feeling of oil remaining.

[Table 2]

Table 3 below shows performance data in the case of Examples 6 to 12 in which one or two types of other esters were contained. The detergency was very high and the irritation was weak. In addition, the individual description about the compounding amount of each Example,
Although omitted because it is described in the table, of course, three or more kinds of esters may be contained in an emulsified state, and it is not limited to the exemplified range, but is an ester used as a plasticizer. The object of the present invention can be achieved by incorporating one or more kinds of hand soaps having a cleaning effect in an appropriate amount in an emulsified state.

[Table 3]

[0018]

As described above, according to the present invention, paint stains, grease stains, and machine oil stains are almost completely removed without relying on the polishing effect of an abrasive or the dissolution effect of a high-concentration solvent as in the prior art. And the effect on hand skin can be minimized, and this effect is extremely large. Moreover, the hand soap of the present invention can be widely used not only for workers handling paints and machine oils, etc., but also for home use and general use as well as for use, safety, hygiene, etc. However, it has a great effect on the user, and its commercial value is extremely high.

Claims (2)

[Claims] 1. An ester which is a liquid at ordinary temperature in a detergent composition, and is an acrylic resin, a vinyl chloride resin, a cellulose resin, a styrene resin, a vinyl acetate resin, an epoxy resin,
7. One or more esters selected from those used as plasticizers such as phenolic resins.
A hand soap composition comprising 0 to 20.0% by weight in an emulsified state. 2. The hand soap composition according to claim 1, wherein the ester is dimethyl phthalate, diethyl phthalate, dibutyl phthalate, triacetyl glyceryl, triethyl citrate, dimethyl adipate, diethyl adipate, diisobutyl adipate or the like.