JP4348313B2 - Cleaning composition - Google Patents

Description

  In general, in addition to foaming, cleanliness, and economy, the basic performance of liquid body cleansers is focused on refreshing after washing. Fatty alkali metal salts (fatty acid soaps) are used as liquid body cleansers that combine these. The one based on is becoming mainstream. However, this product has a good refreshing feeling, but at the same time a feeling of freshness and bulkiness is generated, and there is a problem that it is irritating. In order to solve this problem, a combination of surfactants (anions and amphoteric) has been conventionally used, but the disadvantages have not been solved while taking advantage of fatty acid soaps.

  Moreover, the technique which solves these problems by controlling pH by mix | blending a specific surfactant by a specific ratio is disclosed. (For example, refer to Patent Document 1) However, fatty acid salts, particularly potassium salts, remarkably deteriorate the fluidity and low-temperature stability of the preparation because the free fatty acid precipitates when the pH of the preparation is lowered to around 8. There was a problem of doing. A solvent such as a polyhydric alcohol is used as a viscosity modifier of the preparation, but there are problems such as causing separation of the preparation, impairing the refreshing feeling after washing, and changing the foam quality. In addition, although the pH of the preparation can be suppressed to near neutral by using triethanolamine salt, there are disadvantages of palatability such as poor foaming and no washing up compared to alkali metal salts, and over time. There were problems such as yellowing of the preparation.

Japanese Patent Publication No. 6-248298

  Therefore, the object of the present invention is that the fluidity and low-temperature stability are good, and without damaging the foaming and slimy feeling that are the advantages of the fatty acid soap, and further, the feeling of tension and bulkiness after washing is achieved. An object of the present invention is to provide a liquid body cleaning material having a high moisturizing effect that can give an excellent moist feeling without being generated.

  In this situation, the present inventors have conducted intensive research. As a result, when a fatty acid alkali metal salt having 8 to 22 carbon atoms and a polyglycerin monoalkyl ether are used in combination, foaming is good, low irritation, and sliminess. The present inventors have found that a detergent composition having a high moisturizing effect can be obtained, which is excellent in rinsing properties and moisturized without having to be moistened after washing, and has a good skin feel.

  That is, this invention provides the cleaning composition containing a C8-C22 fatty acid alkali metal salt and polyglycerol monoalkyl ether.

  The fatty acid alkali metal salt used in the present invention has 8 to 22 carbon atoms, preferably 10 to 20 carbon atoms, more preferably 12 to 18 carbon atoms from the viewpoint of foamability and solubility. . Examples of fatty acids in such fatty acid alkali metal salts include animal oils and fats such as beef tallow and sheep oil, plant oils and fats such as coconut oil, palm kernel oil, soybean oil, olive oil, and cottonseed oil by high pressure decomposition by a conventional method. And lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, isomyristic acid, isopalmitic acid, isostearic acid and the like obtained by separating and purifying them. These may be used alone or in combination of two or more. Examples of the counter ion for forming a salt by ionic bond with the fatty acid as described above include alkali metal ions such as sodium ion and potassium ion.

  In the liquid body wash of the present invention, the fatty acid alkali metal salt only needs to be present in the product, and a fatty acid alkali metal salt may be used as a blending component of the liquid body wash, and the corresponding fatty acid and A fatty acid alkali metal salt may be formed during production using an alkali containing the counter ion, for example, potassium hydroxide or sodium hydroxide as a blending component.

  The proportion of the fatty acid alkali metal salt in the detergent composition is not particularly limited, but is usually 5 to 40 parts by weight, preferably 10 to 40 parts by weight. If the ratio in the cleaning composition is less than 5 parts by weight, the detergency and foaming of the fatty acid alkali metal salt will be insufficient, and if it exceeds 40 parts by weight, the viscosity may increase and the low-temperature stability may deteriorate significantly. It is not preferable.

  Examples of the polyglycerin monoalkyl ether used in the present invention include those represented by the following general formula (1).

_{R 1 - (OCH 2 -CH-} CH 2) n-OH Formula (1)
(In the formula, R ₁ is an alkyl group, an alkenyl group, or a hydroxyalkyl group, regardless of whether it is linear or branched, and n is an integer of 2 or more.)

R ₁ in formula (1) is not particularly limited as long as it is a linear or branched alkyl group, alkenyl group, or hydroxyalkyl group, but is linear or branched having 8 to 18 carbon atoms. An alkyl group is preferable, and a linear alkyl group having 8 to 14 carbon atoms is particularly preferable. Specific examples include octyl group, nonyl group, decyl group, undecyl group, dodecyl group, tridecyl group, and tetradecyl group. Further, n in the formula (1) is not particularly limited as long as it is an integer of 2 or more, but is preferably 2 to 20, particularly preferably 3 to 10, and further preferably 6 to 10. As a method for producing polyglycerol monoalkyl ether, in the presence of a basic catalyst, a method in which glycidol is added to and reacted with an aliphatic alcohol so that the molar ratio of the alcohol / glycidol is specified; Examples thereof include a method obtained by reacting an olefin epoxide, a method of opening a ring of alkyl glycidyl ether using polyglycerin in the presence of an acid catalyst or an alkali catalyst, and the like, but is not particularly limited. Preferred examples of such polyglycerol monoalkyl ether include tetraglycerol monooctyl ether, tetraglycerol monodecyl ether, tetraglycerol monododecyl ether, tetraglycerol monotetradecyl ether, hexaglycerol monooctyl ether hexaglycerol monodecyl ether, hexa Glycerin monododecyl ether, hexaglycerin monotetradecyl ether, octaglycerin monooctyl ether, octaglycerin monodecyl ether, octaglycerin monododecyl ether, octaglycerin monotetradecyl ether, decaglycerin monodecyl ether, decaglycerin monododecyl ether, deca Glycerin monotetradecyl ether and the like, more preferably hexa Li serine mono dodecyl ether, octa glycerin mono dodecyl ether, is a decaglycerol mono dodecyl ether.

  The polyglycerin monoalkyl ether of the present invention can be used alone or in combination of two or more, and the ratio in the cleaning composition is not particularly limited, but is usually 0.01 to 20 parts by weight. , Preferably 0.1 to 15 parts by weight, particularly preferably 0.5 to 10 parts by weight. If it is less than 0.01 part by weight, sufficient foaming, moisturizing effect and feel improving effect cannot be obtained, and if it exceeds 20 parts by weight, it is difficult to prepare the composition and the feeling of use is inferior.

  The detergent composition of the present invention is preferable because an amphoteric surfactant and a nonionic surfactant can be further blended, and the skin feel performance can be further improved. Among these, the amphoteric surfactant is not particularly limited as long as it is used for ordinary detergents. For example, carbobetaine-based active agents, amide betaine-based active agents, sulfobetaine-based active agents, phosphobetaine-based active agents. Any of an agent, an imidazolium betaine activator, an amine oxide activator, and the like can be used.

  Of these, alkylamidopropylbetaine, alkylhydroxysulfobetaine, alkyldimethylaminoacetic acid betaine, alkylhydroxyphosphobetaine, 2-alkyl-N-carboxyalkyl-N-hydroxyalkylimidazolinium betaine, and alkyldimethylamine oxide are preferred. Particularly preferred are alkylamidopropylbetaine, alkylhydroxysulfobetaine, alkylhydroxyphosphobetaine, 2-alkyl-N-carboxyalkyl-N-hydroxyalkylimidazolinium betaine, and alkyldimethylamine oxide.

In addition, the nonionic surfactant is not particularly limited as long as it is used in an ordinary detergent composition, for example, polyoxyethylene fatty acid ester, polyoxyethylene hydrogenated castor oil, polyoxyethylene sorbitan fatty acid ester, C ₈ -C ₁₂ fatty acid monoglycerides, glycerol monoalkyl ethers, polyoxyethylene alkyl ethers, polyoxyethylene polyoxypropylene glycol, coconut oil fatty acid _{diethanolamide,} C 6 _{-C 24} fatty acid _{diethanolamide,} C 6 _{-C 24} fatty acid monoethanolamide Examples thereof include amides, glycerin fatty acid (C ₆ -C ₂₄ ) esters, and alkyl saccharide surfactants.

Of these, glycerin monoalkyl ether, polyalkyl glycoside, C _{6 to} C ₂₄ fatty acid diethanolamide, C _{6 to} C ₂₄ fatty acid monoethanolamide, and polyoxyethylene polyoxypropylene glycol are particularly preferable.

Examples of amphoteric surfactants and nonionic surfactants include alkylamidopropylbetaine, alkylhydroxysulfobetaine, alkylhydroxyphosphobetaine, 2-alkyl-N-carboxyalkyl-N-hydroxyalkylimidazolinium betaine, alkyldimethylamine oxide , Glycerin monoalkyl ether, polyalkylglycoside, C ₆ -C ₂₄ fatty acid diethanolamide, C ₆ -C ₂₄ fatty acid monoethanolamide, polyoxyethylene polyoxypropylene glycol are preferred.

  One or two or more selected from these amphoteric surfactants and nonionic surfactants can be used in combination, preferably 0.1 to 30 parts by weight in the detergent composition, In particular, 0.5 to 25 parts by weight, and further 0.8 to 20 parts by weight is preferable because the skin feel is further improved.

  In addition to the above components, the cleaning composition of the present invention includes components used in ordinary cleaning compositions, such as viscosity modifiers such as anionic, nonionic, and cationic polymers; moisturizing components such as polyols; amides , Foam boosters; other preservatives, squalane, jojoba oil, olive oil, higher alcohols, lanolin, esters, silicone and other oils, water-soluble polymers, pH adjusters, UV absorbers, pearling agents, antioxidants, perfumes , Pigments and the like can be appropriately blended within a range not impairing the effects of the present invention.

  The cleaning composition of the present invention can be produced by, for example, mixing the above components and water according to a normal method. Here, it is preferable to mix 45 to 95 parts by weight, particularly 60 to 90 parts by weight of water in the cleaning composition.

  The cleaning composition of the present invention has good foaming, low irritation and non-slip properties, excellent rinsing properties, and does not become sticky after washing, giving a moist and good skin feel. Suitable for cleaning.

  EXAMPLES Next, although an Example and a comparative example are given and this invention is demonstrated further in detail, this invention is not limited to these Examples.

Examples and Comparative Examples Cleaning compositions having the compositions shown in Tables 1 and 2 were produced by a conventional method, and foaming, rinsing properties and skin feel were evaluated. The results are shown in Tables 1 and 2. The numerical values of the blending amounts in the table are the respective parts by weight when the total amount of the purified water is 100 parts by adding the remainder.

  From the results shown in Tables 1 and 2, all of the products of the present invention had good foaming and a very good skin feel. Moreover, there was no feeling of tension and it was excellent in moisture retention.

(Evaluation methods)
(1) Method for Measuring Foaming A 20-fold diluted aqueous solution was prepared for each cleaning composition, and 100 ml of this solution (liquid temperature 30 ° C.) was injected into a 500 ml graduated cylinder. Next, a stirring blade was placed in the solution, and stirring was performed for 1 minute at a rotation speed of 1000 rpm. Then, the volume (ml) of the generated foam was measured and used as the amount of foaming.
○: Foaming 350 ml or more Δ: Foaming 250 ml or more and less than 350 ml ×: Foaming less than 250 ml

(2) Feeling of squeezing: Rinsing properties when a hand was washed with 1 g of the detergent composition were subjected to sensory evaluation according to the following criteria by a specialized panelist.
○: Not stuck after washing.
Δ: Slightly pulled after washing.
×: Pulled after washing.

(3) Skin feel: A sensory evaluation was performed on the skin feel (moist feeling) after washing when a hand was washed with 1 g of the detergent composition by a specialized paneler according to the following criteria.
A: The skin feel after washing is very good.
○: The skin feel after washing is good.
Δ: Skin feel after washing is not so good.
X: The skin feel after washing is not good.

(4) Moisturizing property: A 10% aqueous solution of the detergent composition is well foamed and washed 20 times back and forth with respect to the forearms of 5 specialist panelists. After that, it was washed away with running water for about 10 seconds, and the skin moisture value was measured 6 times every hour at 15 minute intervals using SKICON-200 (Skin Surface Angle Moisture Analyzer IBI S). The average value was obtained. (The skin conductance before washing is 60 μs)
○: 40-60 μs Excellent in moisture retention Δ: 30-40 μs Slightly inferior in moisture retention ×: 10-30 μs Inferior in moisture retention

  All of the detergent compositions according to the present invention have good foaming, low irritation, non-smoothness, excellent rinsing properties, and do not get stuck after washing and give a good skin feel. It is.

Claims (2)

  A detergent composition containing a fatty acid alkali metal salt having 3 to 22 carbon atoms and decaglycerin monododecyl ether.   The detergent composition according to claim 1, further comprising an amphoteric surfactant or a nonionic surfactant.