JP2011074170A - Detergent composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a detergent composition excellent in foamability, detergency of powder and pigment, as well as storage stability, the main component of which is made of food or a food additive. <P>SOLUTION: The detergent composition includes the following components (a) to (d), wherein [a+b] of the sum of the component (a) and (b) is 7-42 mass%, [a/b] of the mass ratio of the component (a) to (b) is 1/2-8/1, and the content of the component (c) is 0.1-3 mass%. The component (a) is fatty acid basic amino acid salt made of the following fatty acid and amino acid composition, wherein the fatty acid comprises lauric acid and myristic acid; the mass ratio of lauric acid to myristic acid is 1/4-10/1; basic amino acid is L-arginine and/or L-lysine; and the molar ratio (neutralization rate) of basic amino acid to fatty acid is 4/5-1/1. The component (b) is polyoxyethylene sorbitan fatty acid ester. The component (c) is at least one water-soluble cellulose derivative selected from among hydroxypropylmethyl cellulose, hydroxypropyl cellulose and sodium carboxymethyl cellulose. The component (d) is water. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a cleaning composition, and more particularly to a cleaning composition suitably used for infant body cleaning, cleansing, hand soap and the like.

In recent years, as consumers' safety-consciousness has increased, detergent compositions that are used in contact with humans are required to be highly safe, such as being safe even when in the mouth and being less irritating to the skin. Has been. In particular, cleaning agents such as infant body cleaners, cleansing cosmetics, and hand soaps have a high awareness of problems because of concerns over accidental ingestion of detergents and residual surfactants entering the mouth.
So far, a detergent composition composed only of food additives such as sucrose fatty acid esters and polyglycerin fatty acid esters has been proposed. However, sucrose fatty acid ester has poor hydrolysis stability, and when mixed with a detergent, it hydrolyzes into sucrose and fatty acid over time, which causes problems such as precipitation from fatty acid. Since generally contains a large amount of impurities such as fatty acid monoglyceride, there is a problem that precipitation occurs under low temperature storage when blended in a cleaning agent. In addition, sucrose fatty acid esters and polyglycerin fatty acid esters have a problem that foamability is insufficient.
Against such a background, Patent Document 1 is composed mainly of food additives such as fatty acid salts of basic amino acids and fatty acid ester nonionic surfactants, and has foaming properties, emulsion stability, and storage stability. In addition, a surfactant composition excellent in safety has been proposed. However, the surfactant composition of Patent Document 1 cannot be said to have sufficient detergency, particularly in terms of detergency of powders and pigments attached to the skin after using sunscreen cosmetics and makeup cosmetics. It was not satisfactory enough.
Patent Document 2 does not contain only food additives, but contains nonionic polymers as optional components in addition to fatty acid basic amino acid salts, fatty acid alkali metal salts, and cationized polymers. The non-ionic polymer is exemplified by hydroxypropylcellulose, hydroxypropylmethylcellulose and the like. Although the skin cleanser composition of Patent Document 2 has good foaming properties and foam quality (creamy properties), it is said that there is no moistness when rinsing and a moist feeling after towel drying. And the detergency of the pigment was not satisfactory.
Therefore, a cleaning composition that is composed mainly of food or food additives, has good foaming properties, is excellent in cleaning properties such as powders and pigments, and has excellent storage stability is still available. The situation was not provided.

JP-A-56-70098 JP 2008-179583 A

  The problem to be solved by the present invention is that the main component is composed of only food or food additives, has good foaming properties, is excellent in cleaning properties such as powders and pigments, and is also excellent in storage stability. It is to provide a composition.

In order to solve the above-described problems, the present inventors have made extensive studies and obtained the following knowledge.
One or two or more water-soluble substances selected from polyoxyethylene sorbitan fatty acid esters and hydroxypropylmethylcellulose, hydroxypropylcellulose, and sodium carboxymethylcellulose with respect to detergents mainly containing a specific fatty acid basic amino acid salt By combining cellulose derivatives in specific ratios, desorption / dispersion of powders and pigments from the skin is promoted, cleaning performance is greatly improved, and cleaning is also excellent in foaming properties and storage stability. The present invention was completed by finding that an agent composition was obtained.

That is, the present invention is as follows.
(A) Fatty acid basic amino acid salt / fatty acid consists of lauric acid and myristic acid,
The mass ratio of lauric acid to myristic acid is 1/4 to 10/1.
The basic amino acid is L-arginine and / or L-lysine,
The molar ratio (neutralization rate) of basic amino acid to fatty acid is 4/5 to 1/1
(B) Polyoxyethylene sorbitan fatty acid ester (c) One or more water-soluble cellulose derivatives selected from hydroxypropylmethylcellulose, hydroxypropylcellulose and sodium carboxymethylcellulose (d) Water The above components (a) to (d) The sum [a + b] of component a and component b is 7 to 42% by mass, the mass ratio [a / b] of component a and component b is 1/2 to 8/1, and the content of component c is 0. Cleaning composition which is 1-3 mass%.

The cleaning composition of the present invention has good foaming properties and excellent cleaning properties. In particular, since sufficiently satisfactory results can be obtained in the cleaning properties of powders and pigments, not only normal body cleaning, but also skin coated with makeup agents and UV protection agents containing a large amount of powders and pigments, It is possible to clean the skin after applying the makeup or UV protective agent only by using the cleaning composition without particularly using a makeup remover. And since it is excellent also in the storage stability in a low temperature range and a high temperature range, quality can be maintained regardless of an environment. In addition, because the main ingredients are composed of food or food additives, it is highly safe, and there are concerns about accidental swallowing and residue of cleaning agents, especially body cleaning agents for infants, cleansing cosmetics, hand soaps. It is useful for such applications.

Hereinafter, the present invention will be described in detail.
The fatty acid part of the fatty acid basic amino acid salt which is the component a of the present invention is used in combination with lauric acid and myristic acid, and the mass ratio of lauric acid to myristic acid [lauric acid / myristic acid (w / w)] is 1 / It is 4 to 10/1, preferably 3/7 to 8/1, more preferably 1/2 to 6/1. When [lauric acid / myristic acid (w / w)] is less than 1/4, the foamability tends to be insufficient, and the low-temperature stability tends to decrease. If it exceeds 10/1, the cleaning properties of the powder and pigment become insufficient.
Lauric acid and myristic acid may be a single substance, or a mixed fatty acid mainly composed of lauric acid or myristic acid such as coconut fatty acid may be used as long as the intended purpose is not impaired.
The basic amino acid part of the fatty acid basic amino acid salt is L-arginine and / or L-lysine, and L-arginine is preferably used in terms of foamability and storage stability.
The molar ratio of basic amino acid to fatty acid [basic amino acid / fatty acid (mol / mol)], that is, the neutralization rate is 4/5 to 1/1, preferably 17/20 to 1/1, more preferably 9 / 10 to 1/1.
When the neutralization rate is less than 4/5, the free fatty acid is excessively present, resulting in poor foaming properties and poor low-temperature stability. In addition, when the neutralization rate exceeds 1/1, free basic amino acids are present, so that odors derived from amino acids may occur during long-term storage. Further, since the pH of the cleaning agent becomes high, it becomes difficult to obtain a moist feeling after washing.

The polyoxyethylene sorbitan fatty acid ester which is component b of the present invention is a nonionic surfactant obtained by adding ethylene oxide to sorbitan fatty acid ester which is a partial ester of sorbitol or sorbitan and a fatty acid.
The structure of the polyoxyethylene sorbitan fatty acid ester is not particularly limited, but it is 13 to 18, preferably 14 to 17.5, more preferably 15 to 17 as HLB based on the Griffin calculation formula. If the HLB is less than 13, foaming properties may be impaired, and if the HLB exceeds 18, the detergency of the powder or pigment may be deteriorated.
Specifically, polysorbate 20 (polyoxyethylene (20 mol) sorbitan monolaurate, HLB: 16.7), polysorbate 60 (polyoxyethylene (20 mol) sorbitan monostearate, HLB: 15.5), polysorbate 80 ( Polyoxyethylene (20 mol) sorbitan monooleate, HLB: 15.0), and the like. Among these, polysorbate 20 and polysorbate 80 are preferably used. Polysorbate 20 improves foaming properties, and polysorbate 80 is detergency. It is excellent in improving.

The component c of the present invention is one or more water-soluble cellulose derivatives selected from hydroxypropylmethylcellulose, hydroxypropylcellulose, and sodium carboxymethylcellulose. These water-soluble cellulose derivatives have a surface activity and are indispensable components in the present invention for enhancing the detergency of powders and pigments.
When using water-soluble polymers other than component c, for example, cationized cellulose typified by hydroxyethylcellulose trimethylhydroxypropylammonium chloride, xanthan gum, sodium alginate, guar gum, carboxyvinyl polymer, etc., the effect of improving detergency cannot be obtained. Not only may the foaming properties be adversely affected.
In order to improve detergency, hydroxypropyl methylcellulose and hydroxypropylcellulose are preferably used, and hydroxypropylmethylcellulose is more preferable. However, in the case where the amount of component a is large, for example, when [a / c] exceeds 40/1, hydroxypropyl methylcellulose may be insolubilized by salting out to cause precipitation. It is preferable to use propylcellulose or sodium carboxymethylcellulose, or a combination of two or three water-soluble cellulose derivatives.
The viscosity of the 2 mass% aqueous solution of the component c is 80 to 7,000 mm ² / s, preferably 1,000 to 6,000 mm ² / s, and more preferably 3,000 to 5,000 mm ² / s.

In the cleaning composition of the present invention, the content of component a is 5 to 40% by mass, preferably about 12.5 to 30% by mass, and the content of component b is 2 to 20% by mass, preferably It is about 5-15 mass%.
The sum [a + b] of the a component and the b component is 7 to 42% by mass, preferably about 10 to 36% by mass.
The mass ratio [a / b] of component a and component b is 1/2 to 8/1, preferably 1/1 to 6/1, and more preferably 1.5 / 1 to 5/1. . When the mass ratio [a / b] of the a component and the b component is less than 1/2, the foaming property is not sufficient, and when [a / b] exceeds 8/1, the detergency and low temperature of the powder and pigment are low. The stability is insufficient.
Content of c component in the cleaning composition of this invention is 0.1-3 mass%, More preferably, it is 0.3-2.5 mass%, More preferably, it is 0.5-2.0 mass%. It is. If the content of component c is less than 0.1% by mass, the cleaning properties of the powder and pigment are insufficient, and if it exceeds 3% by mass, not only the foaming properties are inhibited, but also the viscosity of the cleaning composition is high. It becomes too much and causes inconvenience in terms of handling.
The proportion of the sum of the masses of component a, component b and component c in the composition is not particularly limited, but is usually 8 to 45% by mass, preferably 10 to 40% by mass, more preferably It is 12-37 mass%.

The d component of the present invention is water, and purified water such as distilled water or ion exchange water can be preferably used.
To the cleaning composition of the present invention, components other than the components a to d can be appropriately added within a range not impairing the effects of the invention, and other additive components include fats and oils such as vegetable oils and animal fats, Hydrocarbon oils such as squalane, liquid paraffin, solvents such as ethanol, propylene glycol and glycerin, builders such as citrate, succinate, malate and tartrate, disodium hydrogen phosphate and trisodium citrate Examples thereof include pH adjusters, antioxidants such as tocopherol, preservatives, ultraviolet absorbers, fragrances, and coloring agents.
The fatty acid basic amino acid salt in the cleaning composition of the present invention may be a salt obtained by reacting a fatty acid and a basic amino acid in advance, and when preparing the cleaning agent, the fatty acid and the basic amino acid, It may be obtained by sequentially mixing together with other components and reacting in a mixed system.

EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples and comparative examples. However, the present invention is not limited to these examples.
<Preparation of cleaning agent>
After pre-dispersing c component (water-soluble cellulose derivative) or c 'component (hydroxyethylcellulose trimethylhydroxypropylammonium chloride) shown in Table 1 in propylene glycol, it was added to ion-exchanged water at room temperature to confirm that there was no lumps Then, it was heated to 80 ° C. while stirring with a propeller in a water bath. Thereafter, all components other than L-arginine were added, and after dissolution was confirmed, L-arginine was finally added. Then, it air-cooled to room temperature, stirring, and obtained the cleaning composition.

<Evaluation method>
1)
Foaming property A 5% by mass aqueous solution of a cleaning agent was stirred for 5 seconds with a Milcer tester (Iwatani Co., Ltd., IFM-100), and the foam height after standing for 1 minute was measured. The determination was made according to the following criteria, and AA, A, and B were considered acceptable.
(Score): (Evaluation)
AA:
Bubble height is 30mm or more
A:
The height of the foam is 25 mm or more and less than 30 mm
B:
The height of the foam is 20 mm or more and less than 25 mm
C:
The height of the foam is 15 mm or more and less than 20 mm
D:
Bubble height less than 15mm 2)
Detergency Apply a uniform 200 mg of a commercially available sunscreen agent (“Atopita Baby Moisturizing UV Cream” manufactured by Tanpei Pharmaceutical Co., Ltd.) to a 1 cm square of artificial leather (“Supplare” manufactured by Idemitsu Fine Techno Co., Ltd.) for 10 minutes or more. Let stand and dry. About 0.5 g of foam discharged from each of the cleaning agents in the former container was dropped onto this, and lightly rubbed 10 times with a finger, followed by washing with 200 mL of tap water.
The evaluation of detergency was calculated by measuring the white light intensity “a value” using a spectrocolorimeter (“CM-2600D” manufactured by Minolta Co., Ltd.). Specifically, by substituting the a value “A ₀ ” before application of the sunscreen agent, the a value “A _X ” after application, and the a value “A _Y ” after application into the formula (I), the cleaning rate is calculated. Calculated.

Cleaning rate (%) = [1− (A _Y −A ₀ ) / (A _X −A ₀ )] × 100 (I)
A ₀ ; a value before application of sunscreen agent
A _X ; a value after sunscreen agent application A _Y ; a value after sunscreen agent washing

The determination was made according to the following criteria, and AA, A, and B were considered acceptable.
(Score): (Evaluation)
AA: Cleaning rate is 80% or more
A: The cleaning rate is 70% to less than 80%
B: The cleaning rate is 60% to less than 70%
C: The cleaning rate is 40% or more and less than 60%
D: Cleaning rate is less than 40%

3)
Low temperature storage stability 100 g of the prepared cleaning agent was filled in a 100 mL glass bottle, sealed, and then stored in a thermostatic bath at −5 ° C. for 1 month. The properties of the sample after the test were confirmed and evaluated according to the following criteria.
○: No change in appearance is observed in the cleaning agent.
×: Appearance changes such as the occurrence of precipitation in the cleaning agent are confirmed.
4)
Storage stability at high temperature 100 g of the prepared cleaning agent was filled in a 100 mL glass bottle, sealed, and then stored in a thermostatic bath at 50 ° C. for 1 month. The properties of the sample after the test were confirmed and evaluated according to the following criteria.
○: Changes in odor, hue, etc. are not confirmed in the cleaning agent.
X: Changes in obvious odor, hue, etc. in the cleaning agent are confirmed.

Table 1 shows the formulation of the cleaning composition and the evaluation results thereof. From Examples 1 to 4, the detergent composition of the present invention is excellent in foaming properties, detergency, low-temperature storage stability, and high-temperature storage stability.
On the other hand, in Comparative Examples 1-11, sufficient effect is not acquired. In Comparative Example 1, since the mass ratio of lauric acid to myristic acid is less than 1/4, the foamability and low-temperature storage stability are insufficient. Since Comparative Example 2 does not contain myristic acid, the cleaning property is insufficient. In Comparative Example 3, since the molar ratio of L-arginine and fatty acid, that is, the neutralization rate is less than 4/5, the foamability and low-temperature storage stability are insufficient. In Comparative Example 4, since the neutralization rate exceeded 1/1, deterioration of odor derived from L-arginine was confirmed during high temperature storage. In Comparative Example 5, since the stearic acid L-arginine salt is used as the a ′ component instead of the lauric acid L-arginine salt as the a component, the foaming property and the low-temperature storage stability are insufficient. In Comparative Example 6, a nonionic surfactant that is not designated as a food additive is used in place of the component b. Therefore, the intended purpose of constituting the main component only with the food additive is not included. Moreover, the foaming property was insufficient. In Comparative Example 7, the sum [a + b] of the a component and the b component was less than 4% by mass, so that the foaming property and the cleaning property were insufficient. In Comparative Example 8, since the mass ratio [a / b] of the a component and the b component was less than 1/2, the foamability was insufficient. In Comparative Example 9, since the component b was not contained, the cleaning property and the low temperature stability were insufficient. In Comparative Example 10, since the component c was not contained, the cleaning property was insufficient. In Comparative Example 11, since a water-soluble polymer other than the component c was used, the detergency was insufficient.

Claims (1)

(A) Fatty acid basic amino acid salt / fatty acid comprising the following fatty acid and amino acid composition comprises lauric acid and myristic acid,
The mass ratio of lauric acid to myristic acid is 1/4 to 10/1.
The basic amino acid is L-arginine and / or L-lysine,
The molar ratio (neutralization rate) of basic amino acid to fatty acid is 4/5 to 1/1
(B) Polyoxyethylene sorbitan fatty acid ester (c) One or more water-soluble cellulose derivatives selected from hydroxypropylmethylcellulose, hydroxypropylcellulose and sodium carboxymethylcellulose (d) water The above (a) to (d) And the sum [a + b] of component a and component b is 7 to 42% by mass, the mass ratio [a / b] of component a and component b is 1/2 to 8/1, and the content of component c is 0.00. The cleaning composition which is 1-3 mass%.