JP2006160674A - Skin cleanser composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a skin cleanser composition which has an excellent bubbling property and rinsability, is low irritative for the skins, and has a beautiful pearl appearance. <P>SOLUTION: This skin cleanser composition comprises the following components (A) and (B): (A) fatty acids and their salts in a total amount of 20 to 50 mass%; (B) a 12 to 30C branched fatty alcohol in an amount of 0.1 to 6 mass%, wherein the composition of the fatty acids constituting the component (A) comprises ≤15C fatty acids and ≥16C fatty acids in a mass ratio of 20:80 to 40:60, and the 20 to 24C fatty acids are contained in an amount of 10 to 30 mass% in the total fatty acids. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a fatty acid soap-based skin cleansing composition having a beautiful pearl appearance.

  2. Description of the Related Art Conventionally, fatty acid soap skin cleansers that are inexpensive, have high cleanability, and have good foaming properties have been used as skin cleansers such as facial cleansers. And as the raw material, fatty acids obtained by hydrolyzing mainly beef tallow, coconut oil, palm oil and palm kernel oil which are natural animal and plant oils and fats (main components are saturated fatty acids and unsaturated fatty acids having 8 to 18 carbon atoms) ) Is used.

On the other hand, in a detergent composition having a pearl appearance, a higher fatty acid glycol ester such as ethylene glycol distearate is mainly used as a pearling agent. However, in order to obtain a sufficient pearly feeling using these pearlizing agents, it is necessary to add a large amount, and in that case, there arises a problem that the foaming of the cleaning agent is deteriorated. For this reason, the trial which obtains the composition which has a pearl feeling without using the conventional pearlizing agent is also made | formed (for example, patent document 1, patent document 2).
JP 2003-231612 A JP 2003-328000 A

  An object of the present invention is to provide a skin cleansing composition having excellent foaming and rinsing properties, low irritation to the skin, and a beautiful pearl appearance.

  In the fatty acid composition constituting the fatty acid and its salt, the inventor sets the ratio of the fatty acid having 15 or less carbon atoms and the fatty acid having 16 or more carbon atoms and the ratio of the fatty acid having 20 to 24 carbon atoms to a specific range, It has been found that the above object can be achieved by using a combination of the branched fatty alcohols.

The present invention includes the following components (A) and (B):
(A) 20-50 mass% of fatty acids and salts thereof in total,
(B) 0.1 to 6% by mass of a branched fatty alcohol having 12 to 30 carbon atoms
And the composition of the fatty acid constituting the component (A) is such that the mass ratio of the fatty acid having 15 or less carbon atoms and the fatty acid having 16 or more carbon atoms is 20:80 to 50:50, and the fatty acid having 20 to 24 carbon atoms. Provides a skin cleanser composition having 10 to 30% by mass of the total fatty acid.

  The skin cleanser composition of the present invention is excellent in foaming and rinsing properties, has low irritation to the skin, and has a beautiful pearl appearance.

As the fatty acid constituting the component (A) and the salt thereof used in the present invention, those having 8 to 24 carbon atoms are used.
Examples of the counter ion constituting the fatty acid salt include alkali metals such as sodium and potassium, basic amino acids, and organic amines. Of these, alkali metal salts are preferable, and potassium salts are particularly preferable in obtaining a liquid or pasty detergent composition.
Further, the neutralization degree of the fatty acid is preferably 60 to 100%, particularly 65 to 95%, and more preferably 70 to 90% in terms of foamability and stability over time.

  1 type or more can each be used for a fatty acid and its salt, and 20-50 mass% in the whole composition, Preferably it is 20-45 mass%, Most preferably, it contains 20-40 mass%. If it is in this range, it is excellent in foaming property and foam quality, and it is preferable because it does not cause a feeling of tension in the washed skin.

  In the present invention, the composition of these fatty acids and their fatty acids is such that the mass ratio of fatty acids having 15 or less carbon atoms and fatty acids having 16 or more carbon atoms is 20:80 to 50:50, preferably 25:75. ˜45: 55, particularly preferably 30:70 to 40:60. If it is in this range, sufficient foaming property is obtained, the skin after washing does not become tight, and the temporal stability is also good.

Preferred examples of the fatty acid having 15 or less carbon atoms include lauric acid and myristic acid.
Examples of the fatty acid having 16 or more carbon atoms include palmitic acid, stearic acid, isostearic acid, oleic acid, arachic acid, behenic acid, lignoceric acid, and the like, and palmitic acid, stearic acid, arachic acid, and behenic acid are particularly preferable. .

  Moreover, in this invention, the fatty acid which comprises a fatty acid and its salt is a C20-C24 fatty acid 10-30 mass% in a total fatty acid, Preferably it is 12-28 mass%, Especially preferably, it is. 15 to 25% by mass. If it is in this range, there is no feeling of tension, it can give a moist feeling to the skin after washing, and the stability over time, foaming property and foam quality are also good.

  As the fatty acid having 20 to 24 carbon atoms, a linear saturated fatty acid having 20 to 24 carbon atoms is preferable, and examples thereof include arachidic acid (20 carbon atoms), behenic acid (22 carbon atoms), lignoceric acid (24 carbon atoms) and the like. One or more of these are used. In particular, arachidic acid and behenic acid are preferable.

Usually, animal and vegetable oils and fats such as beef tallow, palm oil, palm kernel oil, and castor oil used as fatty acids in fatty acid soap-based cleaning compositions contain almost no fatty acids having 20 to 24 carbon atoms. In coconut oil and olive oil, arachidic acid is present in a trace amount of 1% by mass or less, and in rapeseed oil and peanut oil, arachidic acid and behenic acid are present in an amount of about 1 to 3% by mass.
These long-chain fatty acids may be applied as an improvement in the stability of emulsion compositions such as cream (Japanese Patent Laid-Open No. 56-18908) or as a pearly luster imparting agent (Japanese Patent Laid-Open No. 10-226798). However, it is hardly applied as a material for a skin cleansing composition. In addition, as described above, the effect when a large amount of highly lipophilic long-chain fatty acids having 20 to 24 carbon atoms is contained in the fatty acid soap as the main cleaning base has not been known so far. .

The branched fatty alcohol of component (B) used in the present invention has 12 to 30 carbon atoms, preferably 14 to 26 carbon atoms.
The form of branching is not limited, but gel branch type, that is, one having a branched chain having 2 or more carbon atoms is particularly preferable. The Gerbe type branched fatty alcohol is an alcohol obtained by the Gerve reaction (condensation reaction) of two kinds of primary alcohols.

One or more kinds of the branched fatty alcohol of the component (B) can be used, and 0.1 to 6% by mass, preferably 0.2 to 4% by mass is contained in the whole composition. If it is in this range, a good pearl appearance can be obtained without impairing foaming and excessive properties.
The branched fatty alcohol of component (B) is liquid at room temperature and has never been used as a pearling agent in a cleaning composition. It is unpredictable that a pearl appearance can be obtained by combining such a branched fatty alcohol with a fatty acid having a specific composition of component (B) and a salt thereof.

  The skin cleansing composition of the present invention may further contain glycols or glycol ethers. Specifically, ethylene glycol, propylene glycol, 1,3-butylene glycol, diethylene glycol, dipropylene glycol, isoprene glycol, polyethylene glycol (average molecular weight 2000 or less), polypropylene glycol (average molecular weight 1500 or less), diethylene glycol monoethyl ether, etc. In particular, dipropylene glycol and diethylene glycol monoethyl ether are preferable.

  One or more kinds of these glycols or glycol ethers can be used, and 3 to 30% by mass, particularly 5 to 25% by mass of the total composition is contained in addition to foamability, stability and production. From the viewpoint of solubility of fatty acids having 20 to 24 carbon atoms and salts thereof at the time.

  The skin cleansing composition of the present invention may further contain a polyhydric alcohol having 3 or more hydroxyl groups in the molecule. Specific examples include glycerin, sorbitol, mannitol, erythritol, xylitol, maltitol, trehalose, sucrose, polyglycerin, and the like, and glycerin, sorbitol, erythritol, and xylitol are particularly preferable.

  One or more kinds of these polyhydric alcohols can be used, and 3 to 30% by mass, particularly 5 to 28% by mass in the total composition is used to reduce the feeling of skin tightness and give a moist feeling after washing. This is preferable.

  The skin cleansing composition of the present invention preferably contains 20 to 70% by mass of water, particularly 25 to 60% by mass, and more preferably 30 to 50% by mass.

  In the skin cleanser composition of the present invention, in addition to the above components, components used in ordinary cleanser compositions, for example, surfactants other than fatty acid salts, moisturizers, oil components, bactericides, anti-inflammatory agents, Preservatives, chelating agents, thickeners, salts, scrub agents, fragrances, cooling agents, pigments, UV absorbers, antioxidants, plant extracts, and the like can be included.

  The skin cleansing composition of the present invention can be produced by mixing each component, and can be in any form of liquid, cream, paste, or solid. From the viewpoint of usability, it is preferable to use a cream or paste. Further, it can be applied as a facial cleanser, makeup remover, body shampoo, hand soap and the like.

Examples 1-6, Comparative Examples 1-4
A skin cleanser composition having the composition shown in Table 1 was prepared by mixing each component, and pearly feeling, foaming, rinsing properties, irritation and storage stability were evaluated. The results are also shown in Table 1.

(Evaluation methods)
(1) Pearl feeling:
The appearance of each cleaning composition was visually observed and evaluated according to the following criteria.
(Criteria)
A: There is a very beautiful pearl feeling.
○: There is a beautiful pearl feeling.
(Triangle | delta): A pearl feeling is recognized slightly.
X: A pearl feeling is not recognized.

(2) Foaming, rinsing and irritation:
A panel of 10 professionals conducted a face-wash test using each composition, and sensorially evaluated foaming (amount of foam), rinsing properties (goodness of foaming), and irritation (feeling of being sticky, not being bulky). Judgment was made according to the criteria.
(Criteria)
A: Evaluated that 8 or more out of 10 specialized panels were good.
○: Out of 10 professional panels, 6 to 7 were evaluated as good.
(Triangle | delta): Four to five persons evaluated that 10 expert panels were good.
X: Three or less persons evaluated that 10 expert panels were good.

(3) Storage stability:
Each composition was filled in a plastic container with a lid having a capacity of 120 mL and allowed to stand at 5 ° C. and 40 ° C. for 1 month, and then the state was visually observed and judged according to the following criteria.
(Criteria)
○: No change.
(Triangle | delta): There exists some exudation or aggregate.
X: There exists separation or an aggregate.

Claims (4)

The following components (A) and (B):
(A) 20-50 mass% of fatty acids and salts thereof in total,
(B) 0.1 to 6% by mass of a branched fatty alcohol having 12 to 30 carbon atoms
And the composition of the fatty acid constituting the component (A) is such that the mass ratio of the fatty acid having 15 or less carbon atoms and the fatty acid having 16 or more carbon atoms is 20:80 to 50:50, and the fatty acid having 20 to 24 carbon atoms. Is a skin cleanser composition wherein 10 to 30% by mass of the total fatty acids.   Furthermore, the skin cleansing composition of Claim 1 containing glycols or glycol ethers.   Furthermore, the skin cleansing composition of Claim 1 or 2 containing the polyhydric alcohol which has a 3 or more hydroxyl group in a molecule | numerator.   The skin cleansing composition according to any one of claims 1 to 3, comprising 20 to 70% by mass of water.