JP2012144488A - Creamy detergent composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a creamy detergent composition excellent in usability, because of proper hardness over a wide temperature range, excellent in foamability, having creamy foam quality, satisfactory in feeling after cleaned, making a skin vivid and moist after cleaned, and further excellent in temporal stability.SOLUTION: The creamy detergent composition contains (a) 30-50 mass% of 12-18C fatty acid salt, (b) 0.5-5 mass% of hydroxypropyl starch phosphate, (c) 3-15 mass% of 4-6C polyhydric alcohol, and (d) 7-20 mass% of glycerol, and a ratio of a content (mass%) of the (c) component to a content (mass%) of the (d) component satisfies c/d<1, in the creamy detergent composition.

Description

  The present invention relates to a creamy detergent composition for skin, such as body soaps, hand soaps and facial cleansing foams. Specifically, it is a composition having excellent usability by having an appropriate hardness in a wide temperature range, excellent foaming properties, and creamy foam quality, has a good feeling after washing, and after washing The present invention relates to a creamy detergent composition that can give skin firmness and moisture and is excellent in stability over time.

  In general, the main component of a skin cleanser composition such as a body cleanser or face wash is soap, which is a higher fatty acid alkali salt. Soap not only gives a unique refreshing feeling after washing, but also has good biodegradability and is a washing base that is less burdensome to the environment, so it is still widely used today.

  In particular, a cleanser (face cleanser) used on the face is preferred because it has a light and clean feeling without being washed. In addition, since it is excellent in ease of handling and foaming when taken in the hand and has a high-grade appearance, it is preferable that the facial cleanser has a soap-based prescription. Thus, from the viewpoints of usability, feel, etc., a creamy facial cleanser is preferred and generally used.

  In the above-described soap-type cream-type face wash, it is common to contain free fatty acids to make them overfat. This is to prevent the skin from being excessively degreased when it is used for a facial cleanser, etc., and to give a mild cleanability and a smooth feeling to use, but it is known to adversely affect the stability. For example, even if the hardness is moderate at room temperature, it becomes remarkably soft at high temperatures, or becomes harder to use at low temperatures. It is easy to cause the problem that it falls. Further, there may be a problem that the viscosity is lowered with time, becomes very hard, or crystals of acidic soap are precipitated.

  So far, a soapy detergent and a water-soluble detergent composition with improved shape retention at high temperatures and stability over time by incorporating two types of polyhydric alcohols having different carbon numbers into soap. Cream-type cleaning composition with improved stability over time by adding a sorbitan fatty acid ester type nonionic surfactant and an alkylaminodicarboxylate type amphoteric surfactant to a functional polyhydric alcohol (Patent Document 2) A cream-type facial cleanser (Patent Document 3) and the like in which fatty acid soap and polyglycerin fatty acid ester and diglycerin are blended to improve stability over time has been proposed.

  However, it is difficult to keep any creamy detergent composition stable for a long period of time and in a wide temperature range, and it becomes extremely soft at high temperatures and hard enough to be used at low temperatures. In addition, foaming properties, creaminess, skin firmness and moisture after washing were not sufficient, and the feeling after washing was sometimes deteriorated.

JP 2002-154946 A Japanese Patent No. 4432345 JP 2006-28229 A

  In view of the above problems, the object of the present invention is a composition having excellent usability, excellent foaming properties, and creamy foam quality by having an appropriate hardness in a wide temperature range, and feel of washing. An object of the present invention is to provide a cream-like cleaning composition that is excellent in stability, can give firmness and moisture to the washed skin, and is excellent in stability over time.

  In order to achieve the above object, the present inventors have intensively studied. As a result, by combining the following four specific components, the present inventors have excellent hardness and foamability by having an appropriate hardness in a wide temperature range. A creamy detergent composition that is excellent in creaminess, has a creamy foam quality, has a good feeling after washing, can give the skin after washing clean and moisturized, and has excellent stability over time It was found that a product was obtained.

That is, the creamy detergent composition of the present invention is
a) 30 to 50% by mass of a fatty acid salt having 12 to 18 carbon atoms,
b) 0.5-5% by weight of hydroxypropyl starch phosphate,
c) 3 to 15% by mass of a polyhydric alcohol having 4 to 6 carbon atoms,
d) 7-20% by mass of glycerin
The ratio of the content (mass%) of the component c) and the content (mass%) of the component d) is c / d <1.

  The cream-like detergent composition of the present invention is a composition having excellent usability by having an appropriate hardness in a wide temperature range, excellent foaming properties, and creamy foam quality, and has a feeling of washing up. It is good and can give the skin after washing clean and moisturized, and further has an effect of excellent stability over time.

  Embodiments of the present invention will be described below. The creamy detergent composition of the present invention contains at least each of components a) to d).

[A) Component: Fatty acid salt having 12 to 18 carbon atoms]
The component a) used in the present invention is a fatty acid salt having 12 to 18 carbon atoms, more specifically a potassium or sodium salt of a linear or branched fatty acid having 12 to 18 carbon atoms, and is generally referred to as soap. . The fatty acid salt may be a fatty acid salt in advance, or may be a mixture of a linear or branched fatty acid having 12 to 18 carbon atoms and a considerable amount of an alkali agent in the system.

  Moreover, in cream-type face wash, it is common to use a system containing free fatty acids (overfat). In the present invention, the fatty acid may be added after the fatty acid salt is prepared, or when reacting the fatty acid with the alkaline agent, the amount of the alkaline agent added is reduced to leave unreacted free fatty acid. May be. Under the present circumstances, it is preferable that content of alkali agents, such as sodium hydroxide and potassium hydroxide, is 0.7-0.9 equivalent with respect to a fatty acid, More preferably, it is 0.75-0.85 equivalent. . When the amount is less than 0.7 equivalent, the foamability is deteriorated and stability with time may be deteriorated. When the amount is more than 0.9 equivalent, the usability is deteriorated and the skin is firm and moisturized. The effect may worsen.

  The fatty acid may be a single substance or a mixture. Specifically, lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, linolenic acid, linoleic acid, coconut oil fatty acid, palm oil Examples include fatty acids, palm kernel oil fatty acids, beef tallow fatty acids, and mixtures thereof.

  The fatty acid salt preferably has a laurate composition of 0.5 to 7% by mass, more preferably 2 to 5% by mass, myristate preferably 10 to 30% by mass, and still more preferably 15 to 25%. It preferably contains 1 to 10% by mass, more preferably 3 to 8% by mass of palmitate, and preferably 3 to 15% by mass and more preferably 6 to 12% by mass of stearate. When lauric acid salt is less than 0.5% by mass, the foaming property may be deteriorated. When it exceeds 7% by mass, the firmness and moisture after use cannot be obtained, and the creamy property is further deteriorated. May be. When the myristate is less than 10% by mass, the foamability may be deteriorated, and when it exceeds 30% by mass, the usability and the stability may be deteriorated. When the palmitate is less than 1% by mass, the creaminess and stability may be deteriorated. When the palmitate is more than 10% by mass, the skin feel after washing may be deteriorated. When the amount of stearate is less than 3% by mass, the stability may be deteriorated, and when it exceeds 15% by mass, the foaming property is lowered, or it becomes hard at low temperature and the usability is easily deteriorated.

[B) Component: Hydroxypropyl starch phosphate
The component b) used in the present invention is hydroxypropyl starch phosphate, and is usually obtained by phosphoric acid crosslinking between hydroxypropyl-modified starch and starch, or hydroxypropyl-modified starch.
Hydroxypropyl-modified starch is a starch in which a hydroxyl group is bonded to a starch skeleton via a propyl group, and a suitable balance between hydrophilicity and lipophilicity of starch is obtained. As the position of the hydroxyl group in the propyl group, any position can be taken. The degree of substitution by hydroxypropylation is preferably 0.08 to 0.3. The degree of substitution is the average number of hydroxyl groups of starch molecules per unit of anhydroglucose. In addition, you may have several hydroxyl groups per propyl group.

  The starch used to obtain the hydroxypropyl starch phosphate described above may be any vegetable starch. Examples of such starch include corn, potato, wheat, rice, tapioca, sweet potato and sago. These starches preferably have an amylopectin content of 85% by mass or more, and particularly preferably 90% by mass or more.

The above-mentioned b) hydroxypropyl starch phosphate is preferably gelatinized, and is preferably completely gelatinized. For gelatinization, the starting starch may be gelatinized in advance, the cross-linked product may be gelatinized, and b) hydroxypropyl starch phosphate used as a result is preferably gelatinized.
In addition, b) hydroxypropyl starch phosphoric acid can also be used with other starches, such as a natural starch and a modified starch.

  b) Hydroxypropyl starch phosphate is commercially available, for example, STRUCTURE (registered trademark) XL (manufactured by National Starch) can be used.

[C) Component: Polyhydric alcohol having 4 to 6 carbon atoms]
The component c) used in the present invention is a polyhydric alcohol having 4 to 6 carbon atoms such as 1,3-butylene glycol, diethylene glycol, diglycerin, pentylene glycol, dipropylene glycol, isoprene glycol, hexylene glycol and the like. 1,3-butylene glycol and dipropylene glycol are preferable, and dipropylene glycol is more preferable in that moderate hardness is maintained at a low temperature. When the number of carbon atoms of the polyhydric alcohol is 3 or less, the stability at high temperature is insufficient, and when it is 7 or more, the foamability and creaminess are deteriorated.

[D) Component: Glycerin
The component d) used in the present invention is glycerin, and either purified glycerin or unpurified glycerin derived from fats and glycerin derivatives may be used. By adding glycerin, stability at high temperature can be maintained, creaminess can be increased, and firmness and moisture can be imparted to the skin after use.

[Content of each component]
The cream-like cleaning composition of the present invention contains a) a fatty acid salt having 12 to 18 carbon atoms in an amount of 30 to 50% by mass, preferably 33 to 47% by mass, and more preferably 35 to 45% by mass. If it is less than 30% by mass, stability at high temperature and creaminess are insufficient, and if it exceeds 50% by mass, it is difficult to maintain an appropriate hardness, and further, the feeling of washing is deteriorated.

  b) The content of hydroxypropyl starch phosphate is 0.5 to 5% by mass, preferably 0.5 to 3% by mass, and more preferably 0.8 to 2% by mass. If it is less than 0.5% by mass, the stability at high temperature becomes insufficient, the creaminess is further lowered, the feeling after washing, the firmness and moisture of the skin after washing is also deteriorated. When it exceeds 5 mass%, it will become hard too much and usability will deteriorate, and foamability will also fall.

  C) The content of the polyhydric alcohol having 4 to 6 carbon atoms is 3 to 15% by mass, preferably 5 to 13% by mass, and more preferably 7 to 11% by mass. If it is less than 3% by mass, the stability deteriorates, and further, it becomes difficult to maintain an appropriate hardness. When it exceeds 15% by mass, the foaming property is lowered and it is difficult to maintain an appropriate hardness.

  d) Content of glycerol is 7-20 mass%, 9-18 mass% is preferable, More preferably, it is 11-16 mass%. If it is less than 7% by mass, creaminess and stability are lowered, and it is difficult to maintain an appropriate hardness. When it exceeds 20% by mass, the foaming property is lowered and it is difficult to maintain an appropriate hardness.

  Moreover, in the cream-like cleaning composition of the present invention, c) the content (mass%) of a polyhydric alcohol having 4 to 6 carbon atoms as component, and d) the content (mass%) of glycerin as component. It is necessary that the ratio of c / d <1. When c / d ≧ 1, good stability over time cannot be ensured, and furthermore, appropriate hardness cannot be maintained over a wide temperature range.

  The creamy detergent composition of the present invention is represented by the following formulas (1) to (4) in addition to the components a) to d) for the purpose of further improving the foamability and the feeling of washing. It is preferable to contain 0.6-6 mass% of 1 type or 2 types or more chosen from surfactant, and it is still more preferable to contain 2-4 mass%.

(In the formula, R ¹ is an alkyl group having 7 to 19 carbon atoms or an alkenyl group, R ² is a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, m is an integer of 1 to 3, M ¹ is hydrogen, alkali. (Indicates metal, ammonium, or organic ammonium.)

(Wherein R ³ is an alkyl group having 7 to 19 carbon atoms or an alkenyl group, R ⁴ is a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, M ² is hydrogen, an alkali metal, an alkaline earth metal, Ammonium or organic ammonium is shown.)

(In the formula, R ⁵ represents an alkyl group having 7 to 19 carbon atoms or an alkenyl group.)

Wherein R ⁶ is an alkyl group or alkenyl group having 8 to 20 carbon atoms, M ³ and M ⁴ are each hydrogen or an alkali metal, ammonium, or organic ammonium, and p and q are each 1 to 3 (It is an integer.)

  In addition, sodium and potassium are mentioned as an alkali metal in the said Formula (1), (2) and (4). Examples of the organic ammonium include ammonium having a hydroxyalkyl group having 2 to 3 carbon atoms, and specific examples include monoethanol ammonium, diethanol ammonium, and triethanol ammonium. Examples of the alkaline earth metal in the above formula (2) include calcium and barium.

  The creamy detergent composition of the present invention can be produced according to a usual method. In addition to the above components, the creamy detergent composition contains additives commonly used in detergents within a range not impairing the effects of the present invention. Is also possible. Specific examples of additives include hydrocarbon oils such as liquid paraffin, liquid isoparaffin, squalane, petrolatum, and solid paraffin; natural fats and oils such as beef tallow, lard and fish oil; glyceryl tri-2-ethylhexanoate and the like Synthetic triglycerides; ester oils such as isopropyl myristate, isopropyl palmitate, cetyl palmitate, ethyl oleate, oleyl oleate, and octyldodecyl myristate; waxes such as beeswax and carnauba wax; linear and cyclic dimethylpolysiloxanes; Silicone derivatives such as polyether-modified dimethylpolysiloxane and amino-modified dimethylpolysiloxane; oily bases such as ceramide, cholesterol, protein derivatives, lanolin, lanolin derivatives, and lecithin; Nonionic such as fatty acid esters of polyoxyethylene alkyl ether and polyethylene glycol, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene hydrogenated castor oil, polyglycerin fatty acid ester, polyoxyethylene glycerin fatty acid ester, glycerin mono fatty acid ester, and alkyl polyglucoside Surfactants; Cationic surfactants such as alkyltrimethylammonium chloride; Semipolar surfactants such as alkyldimethylamine oxide; Water-soluble substances such as alginic acid, carboxyvinyl polymer, carboxymethylcellulose, hydroxypropylmethylcellulose, hydroxyethylcellulose, and xanthan gum Polymers; organics such as pyrrolidonecarboxylate, citrate, malate, and salt Other inorganic salts; and the like, and perfumes; dyes; natural extracts derived from animals and plants; fungicides; antioxidants; UV absorbers.

  Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples. As an example of the creamy detergent composition of the present invention, creamy face wash (skin cleanser) shown in Table 1 was prepared and evaluated by the following method. The results are shown in Table 1. In addition, content in a table | surface shows the mass%.

(1) Foaming property An aqueous solution having a composition concentration of 5% by mass was prepared, and the height (mm) of the foam immediately after charging and after 5 minutes was measured at 25 ° C. by the Ross Miles method. A foam having a foam height of 200 mm or more immediately after charging and having a foam persistence of 90% or more determined by the following formula was evaluated as a foaming facial cleanser.
Bubble persistence (%) = [(bubble height after 5 minutes) / (bubble height immediately after sample introduction)] × 100

(2) Usability Twenty women (25) using 3 g of the composition in which the composition was left to stand for 24 hours or more in a thermostat adjusted to 5 ° C., 25 ° C., and 40 ° C., respectively. (-43 years old) as a panelist, the ease of removal when washing the face and the ease of foaming were determined as follows.
2 points: At each temperature, the hardness when picked up by hand is very good, and it is very easy to melt and foam easily.
1 point: At each temperature, when it is felt that the hardness when picked up is just right and the melt is quick and easy to foam.
0 point: When the fabric is too hard or soft at any or all temperatures, or when it feels that the usability is poor, such as slow melting or dripping from the hand.

The total score of 20 people was calculated and evaluated according to the following criteria and shown in Table 1.
A: No panel with a total score of 35 or more and a score of 0: No cosmetics with excellent usability over a wide temperature range.
◯: One or two panelists with a total score of 30 points or more and less than 35 points, or a total score of 35 points or more and 0 points: a cosmetic that is excellent in usability in a wide temperature range.
(Triangle | delta): A total score is 20 points or more and less than 30 points: It is cosmetics inferior to usability.
X: Total score is less than 20: Cosmetics inferior in usability.

(3) Creamy properties 20 women (25 to 43 years old) were panelists, and the foam quality when the face was washed with 3 g of the composition was determined as follows.
2 points: When the foam feels fine and very creamy.
1 point: When the foam feels slightly rough and creamy.
0 points: When the foam feels rough and creamy.

The total score of 20 people was calculated and evaluated according to the following criteria and shown in Table 1.
A: There is no panel with a total score of 35 or more and a score of 0: There is a cosmetic that is very excellent in creamy properties of foam.
◯: One or two panelists with a total score of 30 points or more and less than 35 points, or a total score of 35 points or more and 0 points: a cosmetic with foamy creamy properties.
Δ: Total score of 20 points or more and less than 30 points: Cosmetics that are slightly lacking in the creaminess of foam.
X: Total score is less than 20: Cosmetics lacking creamy properties of foam.

(4) Feel after washing 20 women (25 to 43 years old) were panelists, and the feel after washing with 3 g of the composition was determined as follows.
2 points: When the skin feels not refreshing after being washed and is very refreshing.
1 point: When the skin feels almost refreshing after face washing.
0 points: When the skin after washing the face is tight or feels refreshing.

The total score of 20 people was calculated and evaluated according to the following criteria and shown in Table 1.
A: The total score is 35 points or more, and there is no panel with a score of 0: The cosmetic is very excellent in the feel of washing.
◯: One or two panelists with a total score of 30 points or more and less than 35 points, or a total score of 35 points or more and 0 points: A cosmetic with excellent feel after washing.
(Triangle | delta): A total score is 20 points or more and less than 30 points | pieces: It is a cosmetics somewhat inferior to the feeling of washing up.
X: The total score is less than 20: It is a cosmetic inferior to the feel after washing.

(5) Skin firmness and moisture after face washing Twenty women (25 to 43 years old) were panelists, and the feel after washing with 3 g of the composition was determined as follows.
2 points: When skin feels moist and moist after washing.
1 point: When the skin after washing was slightly moistened and moistened.
0 point: When the skin after the face washing feels that there is no firmness or moisture.

The total score of 20 people was calculated and evaluated according to the following criteria and shown in Table 1.
◎: No panelists with a total score of 35 points or more and 0 points: Cosmetics that are very excellent in the effect of imparting firmness and moisture to the skin after face washing.
○: One or two panelists with a total score of 30 points or more and less than 35 points, or a total score of 35 points or more and 0 points: Cosmetics with excellent effect of imparting firmness and moisture to the skin after face washing It is.
Δ: Total score of 20 points or more and less than 30 points: Cosmetics slightly inferior to the effect of imparting firmness and moisture to the skin after face washing.
X: Total score of less than 20: Cosmetics with inferior effect of imparting firmness and moisture to the skin after face washing.

(6) Stability over time The composition was sealed in a transparent glass container and stored at 5 ° C., 25 ° C., and 40 ° C. for 1 month, the appearance was observed, and evaluated in the following four stages. This case was evaluated as a composition having good stability over time.
A: Good stability (no change in appearance, no grain or lumps when the dough is stretched)
○: Slightly good (no change in appearance, almost no grains or lumps when the dough is stretched)
Δ: Slightly inferior (slight separation or slight discoloration or slight grain or lumps are confirmed)
×: Stability failure (separation or discoloration is remarkable, or grains and lumps are clearly confirmed)

* 1: STRUCTURE (registered trademark) XL made by NSC Japan
* 2: In the formula, R ¹ is an alkyl group having 11 carbon atoms, R ² is a methyl group, m is 2, M ¹ is sodium * 3: In the formula, R ³ is a coconut oil fatty acid (12 carbon atoms) Compound containing lauric acid), R ⁴ is a methyl group and M ² is sodium * 4: In the formula, R ⁵ is an alkyl group having 11 carbon atoms * 5: In the formula, R ⁶ is Compound having 12 carbon atoms, p is 1, q is 1, M ³ is sodium, and M ⁴ is hydrogen

  The cream-like cleaning compositions of the present invention of Examples 1 to 8 are all compositions having excellent usability, foaming properties and creamy foam quality by having appropriate hardness in a wide temperature range. Further, the feel after washing was good, the skin after washing could be given firmness and moisture, and the stability over time was excellent.

  On the other hand, sufficient performance was not obtained for the creamy detergent compositions of Comparative Examples 1-7. That is, in Comparative Example 1, since the content of the component a) was less than the lower limit value of the range specified in the present invention, the foam creamy property and stability over time were not sufficient. In Comparative Example 2, since the component a) exceeds the upper limit of the specified range of the present invention, it is not possible to maintain an appropriate hardness from room temperature to low temperature, resulting in poor usability and further washing up. There was a problem that it feels dry and dry, and the stability over time was not sufficient. In Comparative Example 3, since the component b) is not blended, the creamy property of the foam and the feel of washing are not satisfied, and the effect of imparting firmness and moisture to the skin after washing the face is slightly inferior, The stability over time was also poor. In Comparative Example 4, since the component b) was contained exceeding the upper limit of the range specified in the present invention, the foamability and usability immediately after charging were poor, and the temporal stability at low temperatures was poor. In Comparative Example 5, since the component c) was not contained and propylene glycol was blended instead, it was not possible to maintain an appropriate hardness at high temperatures, and usability and stability over time were poor. In Comparative Example 6, since the content of d) component is less than the lower limit of the range specified in the present invention, and c) component is contained more than d) component, it maintains an appropriate hardness at high and low temperatures. However, the usability was poor, the creaminess of the foam was not satisfactory, and the stability over time was also poor. In Comparative Example 7, the component c) exceeds the upper limit of the range specified in the present invention, and since the component d) is not included, the foamability is not sufficient, and an appropriate hardness can be maintained at high temperatures. Since it was not possible, the usability was poor and the stability over time was also poor.

Claims (1)

a) 30 to 50% by mass of a fatty acid salt having 12 to 18 carbon atoms,
b) 0.5-5% by weight of hydroxypropyl starch phosphate,
c) 3 to 15% by mass of a polyhydric alcohol having 4 to 6 carbon atoms,
d) 7-20% by mass of glycerin
C) A creamy detergent composition in which the ratio of the content (mass%) of the component and the content (mass%) of the component d) is c / d <1.