JP2000143497A - Creamy detergent composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prepare a creamy detergent composition hardly having irritation, excellent in shape stability, not having slime feeling, not causing the deterioration in bubbling and excellent in sense of use by including an N-acyl neutral amino acid, a high molecular polyol and a polyhydric alcohol. SOLUTION: This creamy detergent composition includes (A) (preferably 5-50 wt.%) at least one kind selected from a group consisting of an N-acyl neutral amino acid (e.g. N-acylglycine, N-acylalanine or the like) and/or its salt, (B) (preferably 0.01-10 wt.%) high molecular polyol (e.g. high molecular polyethylene glycol, high molecular polypropylene glycol or the like and preferably a polyol having 15,000-10,000,000 molecular weight) and (C) (preferably 5-60 wt.%) polyhydric alcohol (e.g. 1,3-butylene glycol or the like) preferably in a content ratio (the component A/the component C) of (1/5)-(5/1). The above composition preferably shows pH 5.5-7.0.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a creamy detergent composition, and more particularly to a creamy detergent composition having excellent form stability, good foaming, and excellent usability.

[0002]

2. Description of the Related Art In a creamy detergent composition, an anionic surfactant is used as a cleaning component, a polyhydric alcohol is used to maintain the form, and a higher fatty acid salt is most commonly used as an anionic surfactant. Higher fatty acid salts are excellent in foaming and freshness, but are highly irritating to the skin and ocular mucous membranes due to the alkaline aqueous solution, and produce water-insoluble scum in hard water, and have foaming power and cleaning properties. The force drops significantly. In addition, there is a problem that the skin feels squeaky and firm when rinsing.

[0003] N-acyl glutamate is well known as an anionic surfactant having low skin irritation. N
-Acyl glutamate is weakly acidic in aqueous solution, has low skin irritation, and is also excellent in hard water resistance, but has a slimy feeling when used, and is stable when used as a cream detergent. However, there is a problem in that foaming is reduced by the addition of polyhydric alcohol.

On the other hand, N-acyl neutral amino acid salts such as N-acyl-β-alanine, N-acyl-alanine and N-acylglycine are also known as low-irritating anionic surfactants. For example, Japanese Patent Application Laid-Open No. 5-156287 discloses a low-irritant detergent composition containing N-acyl-β-alanine sodium salt as a main component. These N
-Acyl neutral amino acids do not have the slimy feeling of N-acyl acidic amino acid salts, are excellent in a refreshing feel, and show good foaming even in a mildly acidic region on the skin, but are creamy detergents. However, there is a problem that foaming is reduced by the addition of a polyhydric alcohol similarly to N-acylglutamic acid.

It has been known to use an N-acyl glutamate and a highly polymerized polyol in combination to improve the form stability of a creamy detergent (Japanese Patent Laid-Open No. 62-4796).
Publication No. 2), the problem of foaming reduction due to the addition of a polyhydric alcohol has not been solved.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to provide a creamy composition which is less irritating, has excellent form stability, has no slimy feeling, and has no reduction in foaming due to the addition of a polyhydric alcohol, and has an excellent feeling upon use. It is to provide a cleaning composition.

[0007]

Means for Solving the Problems The present inventor has conducted intensive studies in view of the above situation, and has found that N-acyl neutral amino acid salt is used as a detergent, polyhydric alcohol is used in combination to make a cream, and the form stability is further improved. The present inventors have found that the above object can be achieved by using a high-polymerized polyol in combination for the purpose of suppressing the deterioration of the properties and wrinkles, and completed the present invention.

[0008] That is, the present invention comprises one or more (A) selected from N-acyl neutral amino acids and / or salts thereof, a highly polymerized polyol (B), and a polyhydric alcohol (C). The present invention relates to a creamy detergent composition characterized by the following.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The N-acyl neutral amino acid of component (A) used in the present invention includes N-acylglycine, N-acylalanine, N-acylthreonine,
-Acyl-β-alanine, N-acyl valine, N-acyl leucine, N-acyl isoleucine, N-acyl serine and the like. These N-acyl neutral amino acids can be used in any of D-form, L-form and DL-form.

Among the above N-acyl amino acids, N-acylglycine, N-acylalanine, N-acylthreonine and N-acyl-β-alanine are preferably used.
-Acylglycine, N-acylalanine and N-acylthreonine are more preferred in terms of low irritation.

Further, N-acylglycine and N-acylalanine are preferred from the viewpoints of foam feeling such as foam stickiness and stiffness at the time of washing, less slimy feeling at the time of use, feeling of use such as refreshing feeling, and form of cream. Are more preferred, and N-acylglycine is most excellent.

It is to be noted that N-acyl-N-methyl-β-alanine salts and N-acyl-N-methyl-sarcosine salts, etc.
The methylated N-acyl neutral amino acid salt has high solubility, is difficult to be used as a creamy detergent, and becomes liquid at room temperature, and thus is not suitable as the component (A) used in the present invention. .

The number of carbon atoms of the acyl group of the component (A) in the present invention is preferably from 10 to 18, more preferably from 12 to 1.
4. When the number of carbon atoms is less than 10, foaming is reduced, and it becomes difficult to maintain the form of the cream. When the number of carbon atoms exceeds 18, the hardness of the cream increases and the foaming is reduced. In addition, although it can be used irrespective of straight chain, branched, saturated or unsaturated, straight chain is preferred in terms of foaming, and saturated is preferred in view of form stability. Particularly preferred are a linear acyl group having 12 carbon atoms and a coconut oil fatty acid acyl group (cocoyl group) containing the same as a main component.

Examples of the salt of the component (A) in the present invention include metal salts such as sodium salt, potassium salt and magnesium salt, and organic salts such as arginine salt, lysine salt, histidine salt and triethanolamine salt. Sodium and potassium salts are preferred from the viewpoint of obtaining an excellent cream form, and the sodium salt is most preferred from the viewpoint of stability at low and high temperatures. These salts are 1
It may be neutralized with seed salts or neutralized with two or more salts.

The component (A) of the present invention need not always be used in the form of a salt, but may be used as a mixture with an unneutralized product. However, only the unneutralized material does not foam, so that a part thereof is always blended in a salt form. Of course, when preparing the creamy detergent composition, the unneutralized one may be neutralized with an alkali such as sodium hydroxide, and a part or the whole may be in the form of a salt. The content ratio of the non-neutralized product is generally not more than 1/1 and preferably not more than 1/3. If the proportion of the unneutralized material is too large, the foaming becomes poor.

Examples of the high-polymerized polyol of the component (B) in the present invention include high-polymerized polyethylene glycol and high-polymerized polypropylene glycol, and those having an average molecular weight of 15,000 to 10,000,000 are preferable, and more preferable. It is 20,000 to 5,000,000, particularly preferably 100,000 to 3,000,000. Also, a copolymer of ethylene glycol and propylene glycol can be used, and any of block, random and graft copolymers can be used. Examples include Polyox (trademark: commercially available from Union Carbide). If the average molecular weight is less than 10,000, the morphological stability is insufficiently improved. If the average molecular weight exceeds 10,000,000, the cream becomes viscous, which is not preferable.

The polyhydric alcohol of component (C) in the present invention includes 1,3 butylene glycol, propylene glycol, dipropylene glycol, isoprene glycol, glycerin, diglycerin and the like.

The creamy detergent composition of the present invention can be prepared by lowering the degree of neutralization of the anionic surfactant of the component (A), and can be prepared by appropriately blending an organic acid or an inorganic acid. Can be. Examples of acids include glutamic acid, acidic amino acids such as aspartic acid,
Organic acids such as citric acid, acetic acid, lactic acid, malic acid, p-toluenesulfonic acid, tartaric acid, glycolic acid, and pyrrolidonecarboxylic acid; and inorganic acids such as hydrochloric acid, sulfuric acid, phosphoric acid, carbonic acid, and nitric acid.

The creamy detergent composition of the present invention preferably has a pH of 5.5 to 7.0 from the viewpoint of irritation.
When the pH is less than 5.5, the foaming is significantly reduced, and when the pH is more than 7.0, melting and collapse tend to occur. In the case of a higher fatty acid salt or the like, foaming is remarkably reduced when the pH is lowered to a neutral to weakly acidic range which is mild on the skin, but the anionic surfactant of the component (A) in the present invention is used in such a pH range. But it shows good foaming. The pH of the creamy detergent composition referred to in the present specification means the pH of a 1% aqueous solution (25 ° C.) of the creamy detergent composition.

The amount of the component (A) in the creamy detergent composition of the present invention is 5 to 50 with respect to the detergent composition.
% By weight, more preferably 10 to 30% by weight. If it is less than 5% by weight, it may not be in a creamy form, and if it is more than 50% by weight, the form may be too hard. The amount of the component (B) is preferably 0.01 to 10% by weight, more preferably 0.05 to 5% by weight, based on the detergent composition. If it is less than 0.01% by weight, the effect of improving form stability and reducing foaming by polyhydric alcohol is low, and if it is more than 10%, slimming at the time of rinsing may occur, which is not preferable.

The amount of the component (C) in the creamy detergent composition of the present invention is 5 to 60 with respect to the detergent composition.
% By weight, more preferably from 15 to 50% by weight, even more preferably from 20 to 40% by weight. If it is less than 5% by weight, it may be dissolved without forming a creamy form at room temperature, and if it is more than 60% by weight, it will be difficult to dissolve it when preparing a cream detergent composition, and if foaming will be too low. There is.

The proportion of the components (A) and (C) in the creamy detergent composition of the present invention is usually (A) / (C) = 1/5 to 5/1. , Preferably 1/3 to 1/1.

In the present invention, the reason why the addition of the component (B) improves foaming in addition to the improvement in form stability, which is the effect shown in JP-A-62-4796, is as follows. There may be a reason.

That is, when the foaming is good, the surfactant molecules are considered to be strongly oriented at the gas-liquid interface to stabilize the foam. On the other hand, in the case of the acyl acidic amino acid salt, the hydrophilic group has glutamic acid or aspartic acid. Therefore, two carboxylic acids are present in the hydrophilic group, the hydrophilicity is high, and the molecular area occupied by the hydrophilic group is large. Therefore, when a polyhydric alcohol is used in combination, the hydrophilic group and the polyhydric alcohol strongly interact with each other. By doing so, the orientation at the gas-liquid interface becomes difficult, and bubbling worsens. Here, even if the component (B) is added, the orientation of the surfactant is not improved, and the foaming is not improved. On the other hand, foaming is similarly inhibited by polyhydric alcohol in acyl neutral amino acids, but since there is only one hydrophilic group,
The extent is not as great as acyl acidic amino acid salts. When the component (B) is added, the polyhydric alcohol that has entered the hydrophilic group interacts with the component (B), and the interaction between the surfactants becomes stronger, whereby the orientation is improved and the foaming is improved. It is thought to be done.

In the creamy detergent composition of the present invention, various commonly used additives can be added as long as the effects of the present invention are not impaired. Examples include fatty acids such as lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid and salts thereof; cetanol, behenyl alcohol, stearyl alcohol,
Higher alcohols such as oleyl alcohol; amino acids such as glutamic acid and salts thereof, arginine, lysine, proline, serine, and threonine and salts thereof; wetting agents such as sodium pyrrolidonecarboxylate, trimethylglycine, and polyaspartate; lauroyllysine and lauroyllysine Inorganic powders such as titanium oxide and talc coated with water; water-soluble polymers such as hydroxypropylcellulose, carboxymethylcellulose, cationized cellulose, dimethyldiallylammonium chloride / acrylamide copolymer; anionic surfactants, cationic surfactants,
Surfactants such as amphoteric surfactants and nonionic surfactants; synthetic fats and oils such as vegetable oils, animal fats and oils, natural fats and oils derivatives, mineral fats and oils, lower and higher fatty acid esters, N-acylglutamic acid esters and the like; silicones Compounds, polymeric substances, alcohols, extracts, amino acids, nucleic acids, vitamins, enzymes, anti-inflammatory agents, bactericides, preservatives, antioxidants,
Standards of cosmetic raw materials such as UV absorbers, chelating agents such as edetates, antiperspirants, oxidation dyes, pH adjusters, pearlizing agents, inorganic powders such as titanium oxide, wetting agents, etc. Raw materials described in various official specifications such as quasi-drug raw material standards, Japanese Pharmacopoeia, Japanese Pharmacopoeia Standards for Pharmaceutical Ingredients, and Food Additives Official Standard.

[0026]

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to these Examples.

[0027]

Test Example 1 Each creamy detergent composition shown in Table 1 was prepared, and each creamy detergent composition was hand-washed and washed with tap water at 40 ° C. by 10 expert panelists. Sensory evaluation was performed on the amount of foam, the refreshing feeling of washing, and the slimyness of washing.
Table 1 also shows the evaluation results. In the evaluation, the average value was calculated according to the following criteria, and the case where the average value was 2.5 or more was good (○). 1.5 to 1.5 (normal), 1.4
The following cases were evaluated as defective (x).

<Evaluation Criteria> (About the speed of foaming) 3: Fast 2: Normal 1: Slow

(About foam amount) 3: large 2: normal 1: small

(Refreshing feeling after washing) 3: Refreshing 2: Normal 1: Not refreshing

(Washing after washing) 3: not slimy 2: normal 1: slimy

Regarding the form stability, the creamy detergent composition was filled in a tube, stored in a constant temperature bath at 40 ° C. for 1 week, returned to room temperature, and then compared with the product stored at room temperature. Evaluation was made according to the following criteria. ○: Equivalent to room temperature storage product △: Slightly soft or harder than room temperature storage product ×: Separated or particulate matter Liquid: Liquid and not in creamy form Note that pH is dissolved in 1% and 40% It measured at the glass electrode at ° C.

[0033]

[Table 1]

[0034]

Example 4 (Blending composition) (% by weight) Sodium N-coconut fatty acid acylglycine 25 N-Lauroylglycine sodium 5 Sucrose fatty acid ester 3 ("Lyo-Toshka ester LWA-1570", Mitsubishi Chemical Foods Co., Ltd.) )) Coconut oil fatty acid diethanolamide 1 myristic acid 0.5 concentrated glycerin 25 propylene glycol 10 polyethylene glycol (average molecular weight 20,000) 0.5 polyethylene glycol (average molecular weight 150,000) 0.02 dipotassium glycyrrhizinate 0.2 pyrrolidone carboxylic acid Sodium 1.0 Citric acid monohydrate 1.5 Methyl paraben qs Propyl paraben qs Perfume qs Purified water residue

According to the above composition, a creamy detergent composition was prepared. The obtained detergent composition was excellent in foam performance and form stability.

[0036]

Example 5 (Blending composition) (% by weight) Sodium N-coconut fatty acid acylglycine 20 N-potassium myristolylglutamate 2 Sodium tetradecenesulfonate 2 Sodium myristoylmethyltaurine 2 Potassium myristate 2 Concentrated glycerin 15 Sorbitol 10 1,3-butylene glycol 5 Produe 400 (manufactured by Ajinomoto Co., Inc.) 1 Hardened castor oil O. Adduct (60 mol EO) 3 Polyethylene glycol (average molecular weight 400,000) 2 Polyethylene glycol (average molecular weight 1,000,000) 1 Allantoin 0.3 Triclosan 0.05 Hinokitiol 0.01 Sodium benzoate Appropriate amount Perfume Appropriate amount Purified water residue

According to the above composition, a creamy detergent composition was prepared. The obtained detergent composition was excellent in foam performance and form stability.

[0038]

According to the present invention, it is possible to provide a creamy detergent composition which foams quickly, has a large foam amount, has a refreshing feeling upon use after washing, and has excellent form stability.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C11D 3:20 3:37) F-term (Reference) 4C083 AA122 AC111 AC122 AC132 AC242 AC302 AC312 AC482 AC612 AC642 AC661 AC662 AC682 AC792 AC812 AD041 AD042 AD051 AD222 AD532 AD552 CC05 CC23 DD31 EE01 EE06 EE07 4H003 AB10 AC04 AC13 BA15 DA02 EB04 EB05 EB07 EB08 EB36 ED02 ED28 FA02 FA17 FA21 FA28

Claims (2)

[Claims] 1. A composition comprising one or more (A) selected from N-acyl neutral amino acids and / or salts thereof, a highly polymerized polyol (B) and a polyhydric alcohol (C). Creamy detergent composition. 2. The creamy detergent composition according to claim 1, wherein the pH is 5.5 to 7.0.