JP2001139998A - Transparent gelatinous detergent composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a transparent gelatinous detergent composition being a transparent gel having stability and readily usable hardness even in preservation at a low temperature or high temperature, excellent foamability and slight irritation. SOLUTION: This transparent gelatinous detergent composition is characterized in that the composition comprises 20-60 wt.% of a fatty acid arginine salt obtained by neutralizing a straight-chain or branched chain 8-22C saturated or unsaturated fatty acid which may contain hydroxyl group with 0.9-1.5 equivalents of arginine, a polypropylene glycol of general formula (1) ((n) is an integer of >=1) and water.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a transparent gel detergent composition containing a fatty acid arginine salt as a main component.

[0002]

2. Description of the Related Art Skin cleansing compositions are classified into solid, liquid, and paste-like (gel-like) in terms of appearance. Among them, transparent gel-like cleansing compositions have a unique high-grade appearance. It is considered that the commercial value and marketability are high.

[0003] JP-A-59-232193, JP-A-59-232194, and JP-A-59-232195.
Japanese Patent Application Laid-Open Publication No. H11-163,887 discloses a transparent gel detergent composition containing an amino acid-based surfactant as a main component, but these are disadvantageous in terms of cost because they gel at a portion where the total concentration of the surfactant is high. In addition, there was a disadvantage that a slimy feeling was felt during washing and rinsing.

Many transparent gel detergents using fatty acid salts, which are cheap and safe raw materials, have been proposed. Transparent gel detergent compositions using fatty acid salts often have poor low-temperature stability due to the high crafting point of the fatty acid salt, and are often added to the external phase in order to devise counter ions or increase the solubility of the fatty acid salt. Proposals have been made to use a dihydric alcohol or the like.

For example, Japanese Patent Application Laid-Open No. 63-57699 discloses a gel-like material which maintains transparency even at a low temperature by selecting a substance having a low Kraft point among soaps and blending a polyhydric alcohol as high as 10 to 40%. Detergent compositions have been proposed.

Further, Japanese Patent Application Laid-Open No. 9-2221698 examines the types of polyhydric alcohols and examines the weight ratio of polyhydric alcohol having three or more hydroxyl groups in the molecule to water to 3: 5 to 5:
A gel detergent composition blended at a ratio of 5: 5 is disclosed. According to this disclosed technology, the fatty acid arginine salt forming the gel structure is blended in 20 to 40%, so that the total amount of polyhydric alcohol used in the formulation is as high as at least about 20%.

In these techniques, although the low-temperature stability of the gel-like detergent composition is improved, the foaming property of the gel-like detergent composition is deteriorated because a large amount of polyhydric alcohol is blended, Furthermore, the refreshing feeling peculiar to the soap is impaired, and it has a slimy feeling when used.

[0008] Further, the transparent gel detergent composition to which these prior arts are applied has no consideration on the strength and feeling of use of the gel, and is therefore unsatisfactory in practical use.

[0009] Further, the transparent gel of the prior art is physically difficult to cut, and when the gel-like detergent composition is taken out from the container, a stringing phenomenon is observed in the composition, which significantly impairs the handling of the gel detergent composition. Impairs the sense of quality obtained from transparency,
The formula is not practical.

[0010]

As described above, in the prior art, the gel cannot be controlled to a hardness that is easy to use, the foaming is insufficient, and the coping with the spinning phenomenon is insufficient. Since only a poorly hardened solid could be formulated stably, these improvements are strongly desired.

The first problem to be solved by the present invention is as follows.
An object of the present invention is to provide a transparent gel detergent composition which is stable and easy to use even when stored at a low temperature or a high temperature, and has excellent foaming properties and low irritation.

A second problem to be solved by the present invention is as follows.
Another object of the present invention is to provide a transparent gel detergent composition having no spinning phenomenon.

[0013]

Means for Solving the Problems The inventors of the present invention conducted a study on the low-temperature stability and gel strength of a gel composition in a blended system comprising a fatty acid arginine salt, a polyhydric alcohol, and water. The nonionic substance increases the stability of the gel detergent composition of the fatty acid arginine salt base in a very small addition amount range, finds that the strength of the gel does not increase, and has the property of lowering the strength. It has been found that the spinning phenomenon can be solved by performing the fatty acid composition at a specific ratio, and the present invention has been completed.

[0014] The present invention for solving the first problem is to provide a straight-chain or branched-chain C8 carbon atom which may contain a hydroxyl group.
~ 22 saturated or unsaturated fatty acids from 0.9 to 1.5
Fatty acid arginine salt 20 to 6 neutralized with equivalent arginine
0% by weight and general formula (1)

[0015]

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[Wherein, n represents an integer of 1 or more. ], And a transparent gel detergent composition comprising the polypropylene glycol and water.

According to the present invention for solving the second problem, in the fatty acid arginine salt, the fatty acid contains lauric acid and myristic acid, and the weight ratio is 95: 5 to 50: 5.
The present invention relates to a transparent gel detergent composition characterized by being 0.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION The fatty acid arginine salt, which is the first component used in the present invention, may be one obtained by neutralizing a fatty acid with arginine in advance, or separately adding the fatty acid and arginine during compounding. Then, neutralization may be performed in the compounding system. The fatty acid used in the present invention is a linear or branched saturated or unsaturated fatty acid which may contain a hydroxyl group having 8 to 22 carbon atoms. As fatty acids, for example, caprylic acid, capric acid, myristic acid,
Natural fatty acids such as palmitic acid, palm fatty acid, palm kernel oil fatty acid and the like which are palmitic acid, palmitoleic acid, stearic acid, oleic acid, 12-hydroxystearic acid, isostearic acid and mixtures thereof can be mentioned. However, fatty acids such as stearic acid, which have a high Kraft point, and unsaturated fatty acids which may cause coloring with arginine are preferably 20% by weight or less, more preferably 5% by weight or less of the total amount of fatty acids.

Further, in order to prevent spinnability, a mixed fatty acid containing lauric acid and myristic acid is desirable, and the weight ratio of lauric acid to myristic acid is 95: 5 to 5.
It is desirable to be in the range of 0:50. If the ratio is outside this ratio and a large amount of myristic acid is blended, the spinnability becomes remarkable,
At the same time, the low-temperature stability becomes insufficient, which is not desirable. If a large amount of lauric acid is added, the texture of the foam of the gel composition becomes rough, and the foaming stability deteriorates.

Arginine for neutralizing fatty acids is D-form, L-form
Any of a body and a DL body may be used, or a mixture thereof may be used. A fatty acid lysine salt neutralized with lysine, which is the same basic amino acid as arginine, similarly produces a gel composition, but the odor worsens over time, which is not preferable. The degree of neutralization with respect to 1 mol of the fatty acid is desirably 0.9 to 1.5 mol, more desirably 1.0 to 1.2 mol. When the degree of neutralization with arginine is less than 0.9 mol, the gel does not form, and when the degree of neutralization exceeds 1.5 mol, the gel cannot be kept transparent.

It is possible to neutralize fatty acids in combination with arginine and other cationic substances such as triethanolamine and potassium, but the long-term stability of the gel deteriorates. Is desirable.

In the present invention, the fatty acid arginine salt is blended in an amount of 20 to 60% by weight based on the transparent gel detergent composition. More preferably, the composition is 25 to 35% by weight,
If the amount is less than 20% by weight, the gel becomes weak or does not gel. If the amount is more than 60% by weight, crystals are precipitated and the transparency cannot be maintained.

The second component of the present invention, polypropylene glycol, is a polyhydric alcohol having a specific structure represented by the following general formula (1) as a main component.

[0024]

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[Wherein, n represents an integer of 1 or more. In the formula, dipropylene glycol represented by n = 0 is not preferable because it breaks down the gel.

When n is 1 or more, that is, tripropylene glycol or more, the effects of the present invention are exhibited.

Specifically, tripropylene glycol,
Examples thereof include polypropylene glycol (average molecular weight 400), polypropylene glycol (average molecular weight 1000), and polypropylene glycol (average molecular weight 2000).
Is preferred.

The amount of polypropylene glycol per transparent gel detergent composition may be appropriately selected within the range of 0.5 to 10% by weight, preferably 1.0 to 5% by weight. By increasing the stability of the gel by blending within the above range, the hardness of the gel can be suppressed to a good hardness with good handling properties, and the hardness of the gel changes greatly due to the fluctuation of the blending amount of the fatty acid arginine salt. Never.

In the present invention, sufficient stability can be obtained by adding a small amount of a polyhydric alcohol as compared with the prior art. Therefore, the transparent gel-like detergent composition of the present invention has a Both have performances exceeding conventional transparent gel detergents.

The hardness of the gel detergent mainly containing a fatty acid salt will be described in more detail below.

That is, the hardness of the transparent gel detergent strongly affects its handling. In order to increase the strength of the gel, it is possible to solve the problem by increasing the concentration of the fatty acid salt in the formulation. However, the problem with the conventional gel detergent is that it is too hard. The gel detergent prepared by the prior art is too hard, so that a heavy load is felt when scooping from the container, and it is difficult to remove a desired amount of the gel detergent from the container.

Even if the conventional gel-like detergent is packed in a tube-type container to improve the handling, it is difficult to remove the gel-like detergent because the gel-like detergent is hard when taken out. If you try to spread the hard gel by crushing the gel detergent to clean the skin, the gel will slide out in the same direction as the applied force due to the hardness, and the gel detergent will be removed. Difficult to spread. Therefore, the feeling of use of the conventional gel detergent mainly containing a fatty acid salt is not good.

It has been experimentally confirmed that, in the prior art, when the ratio of polyhydric alcohol which contributes as a viscosity reducing agent is increased in the solution composition in order to reduce the strength of the gel, the gel increases its strength. Was. This is because the gel strength is largely determined by the balance between the fatty acid salt and the water, so that an increase in the amount of the polyhydric alcohol eventually shifts the formulation toward the fatty acid salt rich direction. Furthermore, if the concentration of the fatty acid salt is reduced in order to shift the ratio of the fatty acid salt and water to a water-rich composition, the gel itself becomes soft. However, the formulation at the boundary value between the gel state and the solution state results in insufficient stability, and in some cases, there is a problem that a local gel structure is formed and the whole is not homogenized. I can't control the hardness of things.

According to the study of the present inventors, a nonionic substance having a hydroxyl group is effective for increasing the low-temperature stability of a gel detergent composition comprising a fatty acid arginine salt as a main ingredient, but the effect is remarkable. These were found to be groups of 50 or more and groups of 15 or less in terms of HLB value calculated from the organic conceptual diagram. The nonionic substance located in the middle contributes to the direction of breaking or hardening the gel by the fatty acid arginine salt.

Here, the HLB calculated from the organic conceptual diagram is a value obtained by the following equation HLB value = Σinorganic / Σorganic × 10, which is obtained from the organic and inorganic properties of Oda and Teramura.

Examples of the highly hydrophilic nonionic substance having a hydroxyl group having an HLB value of 50 or more include glycerin, sorbitol,
There are mannitol, polyoxyethylene, etc., which can be stably mixed with the gel detergent mainly composed of fatty acid arginine salt.However, if it is added to the gel preparation only to solve the stability, the gel becomes hard and the composition escapes when picked up. Was found to be undesirable.

The low hydrophilic nonionic substance in the group having an HLB value of 15 or less improves the low-temperature stability of the gel detergent composition containing fatty acid arginine as a main component at a lower blending ratio than the above-mentioned high hydrophilic nonionic substance. It has been found that there is a characteristic that the hardness of the gel does not largely change but tends to be reduced by the compounding.

Among the nonionic substances having an HLB value of 15 or less, those having the most remarkable effect were polypropylene glycols. However, as described above, unless the degree of polymerization of the propylene glycol unit is 3 or more (n in the general formula (1) is 1 or more), the HLB value does not become 15 or less, and the direction of hardening the gel of the fatty acid arginine main agent is reduced. It has been found that a phenomenon in which the composition escapes when picked up, which is undesirable.

Whether the low hydrophilic nonionic substance increases the stability of the gel detergent composition containing a fatty acid arginine salt as a main component and reduces the strength of the gel in a smaller amount than the high hydrophilic nonionic substance, and the mechanism of action is clear. However, when the HLB value is less than 15, the substance having an HLB value of 50 or more dissolves in the aqueous phase and disturbs crystallization. I guess they are giving

The transparent gel-like cleaning composition of the present invention may contain a substance which can be arbitrarily added to cosmetics as long as the effects of the present invention are not impaired.

Examples of usable substances include fatty acid alkanolamide, amidoamine oxide, N-acyl-glycine, N-acylsarcosine salt, N-acyl-N
Anionic surfactants such as -methyl-β-alanine salt, N-acyl-β-alanine salt, N-acylglutamate, acylmethyltaurine and alkyl phosphate, and amphoteric surfactants such as alkylbetaine, amidobetaine and amidoamine amphoteric And fatty acid alkanolamides, POE
Examples include nonionic surfactants such as fatty acid alkanolamides. Further, other additives such as a fragrance, a pigment, a buffer, a salt, an oil, a foaming agent, a whitening agent, a preservative, an antioxidant, a softener, a humectant, a drug, and the like can be added.

[0042]

EXAMPLES The effects of the present invention will be described in more detail with reference to examples.

Examples 1 to 5 and Comparative Examples 1 to 9 Each sample was prepared at the weight ratio shown in Table 1 below, and the following evaluation was carried out for the sample maintaining the gel form.

1. Gel formation At a prescribed blending ratio, raise the temperature to 80 ° C after blending, confirm that all components are uniformly dissolved, cool to room temperature, observe gel formation, and evaluate as follows did. ○ Gel was formed × No gel was formed

2. Gel Stability The gel-formed sample was sealed in a 100 ml transparent glass container and stored in a programmable thermostat programmed to fluctuate between -5 ° C and 45 ° C every 24 hours.
One month later, the state of the gel was observed and evaluated as follows. ○ No change △ Slightly crystallized or the entire composition was opaque × Crystals precipitated and lost transparency

3. The sample on which the spinning gel was formed was sealed in a 100 ml transparent glass container, and allowed to stand in a thermostat at 25 ° C. for 6 hours, the temperature of the gel was adjusted to 25 ° C., and the gel was scooped up with a spoonful of medicine. By observing the state at the time, the spinnability was evaluated as follows. ○ The gel breaks well and does not pull the string × The gel breaks poorly and pulls the string over 3 cm or more from the gel surface

4. Stretch softness 15 monitors were hand-washed with distilled water to moisten the skin surface, and about 1.5 g of each sample sealed in a tube
The composition was placed on each palm, the composition was crushed and foamed, and the feeling of use was evaluated by the following evaluation. 5 points Good spread on the skin surface and easy to use 4 points Gel does not escape, but feels resistant to crushing 3 points Gel escapes but crushes 2 points Gel escapes easily, but can be crushed if palm is depressed 1 point The gels escaped and the gels could not be crushed. The evaluation points were averaged and evaluated as follows.

4 points or more ○ 3 to 4 points × less than 3 points ××

[0049]

[Table 1]

Example 6 Lauric acid 7.4 Wt% Myristic acid 8.5 L-arginine 14.1 PPG1000 5.00 Dipotassium glycyrrhizinate 0.10 Purified water Remainder The degree of argin neutralization of fatty acids in this example is 1.1. Is equivalent. After all the components were mixed and heated to 80 ° C. to form a homogeneous solution, the mixture was cooled to room temperature to form a transparent gel.
The clear gel detergent of this example was satisfactory in low-temperature stability and gel hardness, but was evaluated as poor in spinnability.

Example 7 Lauric acid 8.20 Wt% Myristic acid 7.60 L-arginine 14.2 PPG3000 2.00 Polyoxyethylene glycol monostearate (2EO) 1.00 Dipotassium glycyrrhizinate 0.10 Purified water The degree of neutralization of fatty acids with algin in the examples is 1.1 equivalents. After all the components were mixed and heated to 80 ° C. to form a homogeneous solution, the mixture was cooled to room temperature to form a transparent gel.
The clear gel detergent in this example had good low-temperature stability, good gel feel, and good usability including spinnability.

Example 8 Lauric acid 10.99 Wt% Myristic acid 5.37 L-arginine 13.70 PPG2000 2.00 POE (4.2) lauryl ether 1.00 Collagen 0.10 Purified water residue Fatty acids in this example Has an algin neutralization degree of 1.0 equivalent. After all the components were mixed and heated to 80 ° C. to form a homogeneous solution, the mixture was cooled to room temperature to form a transparent gel.
The transparent gel detergent of the present example had good low-temperature stability, good gel feel, and good usability including spinnability.

Example 9 Lauric acid 11.21 Wt% Myristic acid 5.48 L-arginine 15.31 PPG2000 2.0 Soipon SLE 2.0 Succinylated carboxymethyl chitosan 0.1 Purified water Remainder Algin of fatty acid in this example The degree of neutralization is 1.1 equivalent. After all the components were mixed and heated to 80 ° C. to form a homogeneous solution, the mixture was cooled to room temperature to form a transparent gel.
The transparent gel detergent of the present example had good low-temperature stability, good gel feel, and good usability including spinnability.

Example 10 Caprylic acid 1.50 Wt% Capric acid 1.50 Lauric acid 11.00 Myristic acid 4.20 Palmitic acid 2.00 Palmitoleic acid 0.40 Oleic acid 1.10 L-Arginine 18.10 Purified water 60.00 The degree of neutralization of fatty acids with arginine in this example is 1.1. After all the components were mixed and heated to 80 ° C. to form a homogeneous solution, the mixture was cooled to room temperature to form a transparent gel. The clear gel detergent of this example had good low-temperature stability, good gel hardness, and good usability including spinnability.

[0055]

The transparent gel detergent composition of the present invention described in claim 1 and claim 3 is a transparent gel having a hardness that is stable and easy to use even when stored at a low or high temperature, and foams. Excellent in irritation and less irritating.

The transparent gel detergent composition of the present invention described in claim 2 has the above-mentioned effect and does not cause stringing even if the transparent gel detergent composition is picked up by hand.

Continued on front page F term (reference) 4C083 AB051 AC182 AC241 AC242 AC252 AC261 AC272 AC402 AC581 AC582 AD041 AD042 AD322 AD432 AD532 CC23 DD01 DD41 EE01 EE07 EE10 4H003 AB03 AB04 AB05 AB46 BA15 DA02 EB34 EB41 ED02 FA02 FA10 FA16 FA18 FA18 FA

Claims (3)

[Claims] A fatty acid arginine salt obtained by neutralizing a saturated or unsaturated fatty acid having 8 to 22 carbon atoms, which may have a hydroxyl group, with 0.9 to 1.5 equivalents of arginine. % By weight and the general formula (1) [Where n represents an integer of 1 or more. ] The transparent gel-like detergent composition characterized by containing the polypropylene glycol shown by these, and water. 2. The fatty acid arginine salt, wherein the fatty acid contains lauric acid and myristic acid, and the weight ratio thereof is 95:
The transparent gel detergent composition according to claim 1, wherein the ratio is 5 to 50:50. 3. The transparent gel detergent composition according to claim 1, wherein the blending ratio of the polypropylene glycol represented by the general formula (1) is 0.5 to 10% by weight.