JP5089196B2 - Semi-solid facial cleansing composition - Google Patents

Description

  The present invention relates to a semi-solid facial cleansing composition. More specifically, the present invention relates to a semi-solid facial cleanser composition having excellent shape retention stability and dischargeability from a container.

  In facial cleansers, high fatty acid salts are frequently used because of their excellent detergency and refreshing feeling of use, and their dosage forms are also changed from conventional forms (so-called solid soaps) The mainstream has changed to a semi-solid form that is housed in a container such as a tube.

  Since the higher fatty acid salt is in a crystalline state at room temperature, it is made into a semi-solid dosage form by being highly blended in the detergent (see, for example, Patent Document 1). However, when a higher fatty acid salt is highly blended, the higher fatty acid salt is liable to be liquefied and separated during high temperature storage, and solidification occurs due to crystallization of the higher fatty acid salt during low temperature storage, maintaining a semi-solid form. There is a problem that it is difficult. In order to solve this problem, it is conceivable to suppress the blending amount of the higher fatty acid salt. However, if the blending amount of the higher fatty acid salt is set to a low blending amount, it becomes difficult to form a semi-solid form itself. There's a problem.

  So far, as a means for imparting stability and maintaining a semi-solid form, for example, a creamy detergent composition containing a higher fatty acid and two kinds of polyhydric alcohols having a specific carbon number (for example, patents) (See Document 2).

  However, although these attempts can obtain shape retention and storage stability at high temperatures, solidification due to crystallization of higher fatty acid salts still occurs during low temperature storage, resulting in inferior shape retention stability. There is a problem that it is difficult to discharge from a container such as a tube.

JP 2002-255788 A JP 2002-154946 A

  The present invention has been made in view of the above prior art, and does not cause solidification or separation due to higher fatty acid salts, has excellent shape retention stability of the preparation, and is semi-solid with good discharge from the container It is an object to provide a composition for a facial cleanser. The semi-solid state refers to a paste state having no fluidity.

That is, the present invention
[1] (A) Higher fatty acid salt, (B) (meth) acrylic acid / (meth) alkyl acrylate / (meth) acrylic acid polyoxyethylene alkyl ether copolymer, (meth) acrylic acid / (meth) acrylic At least one selected from the group consisting of an acid alkyl / itaconic acid polyoxyethylene alkyl ether copolymer and (meth) acrylic acid / (meth) acrylic acid alkyl / (meth) acrylic acid polyoxyethylene alkyl ether cross-polymer , ( C ) Polyethylene glycol , and (D) carboxymethylcellulose, sodium carboxymethylcellulose, hydroxymethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose, methylcellulose, ethylcellulose, nitrose Containing at least one selected from the group of roulose and crystalline cellulose ;
The semi-solid facial cleansing composition, wherein the component (A) is contained as a higher fatty acid in the composition in an amount of 10 to 30% by weight ,
[2] The semi-solid facial cleanser composition according to [1], wherein the content of the component (C) is 15 to 30% by weight .
About the.

  The semi-solid facial cleansing composition of the present invention has no solidification or separation of the composition, maintains a semi-solid form even at low or high temperatures, and has an excellent effect on the shape retention stability of the preparation. Play. Furthermore, it has an excellent effect on the dischargeability from the container.

The semi-solid facial cleansing composition of the present invention contains (A) a higher fatty acid salt, (B) a specific copolymer or cross polymer , ( C) polyethylene glycol , and (D) a cellulose-based thickening polymer . To do.

  Examples of fatty acids constituting the higher fatty acid salt of component (A) include higher fatty acids having 12 to 22 carbon atoms such as lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, and behenic acid; olive oil, coconut oil, Examples thereof include vegetable oils such as palm oil and cottonseed oil; animal oils such as fish oil and beef tallow. These components may be used alone or in appropriate combination of two or more. As a suitable component (A), from the viewpoints of detergency and foaming power, higher fatty acids having 12 to 22 carbon atoms are preferably used, and lauric acid, myristic acid, palmitic acid, and stearic acid are more preferably used.

  Moreover, as a salt of a higher fatty acid salt, the alkali metal salt, organic amine salt, etc. which saponified or neutralized the higher fatty acid with the alkali agent can be illustrated. Examples of the alkali agent used include inorganic alkalis such as sodium hydroxide, potassium hydroxide, sodium carbonate and potassium carbonate; organic alkalis such as monoethanolamine, diethanolamine, triethanolamine, trimethylamine and triethylamine. As the alkali agent to be used, it is preferable to use sodium hydroxide or potassium hydroxide from the viewpoint of easy availability of materials and easy handling.

  In order to contain the higher fatty acid salt in the composition for skin cleansing agent of the present invention, the higher fatty acid and the alkaline agent may be blended in advance as a higher fatty acid salt, or the higher fatty acid and the alkaline agent may be blended. It may be a higher fatty acid salt in the composition.

The amount of the component (A) is usually, in terms of a semi-solid, the composition as higher fatty acid is 1 0% by weight or more. Moreover, it is 30 weight% or less from a viewpoint of suppressing solidification and isolation | separation of a composition. From these viewpoints, the content of the component (A) is 10 to 30% by weight in the composition as a higher fatty acid .

(B) is a copolymer component, for example, (meth) acrylic acid / (meth) acrylic acid alkyl / (meth) acrylic acid polyoxyethylene alkyl ether copolymer, (meth) acrylic acid / (meth) Examples thereof include alkyl acrylate / itaconic acid polyoxyethylene alkyl ether copolymer, (meth) acrylic acid / (meth) alkyl acrylate / vinyl neodecanoate cross-polymer, and the like. Moreover, as a cross polymer, (meth) acrylic acid / (meth) alkyl acrylate / (meth) acrylic acid polyoxyethylene alkyl ether cross polymer etc. are mentioned, for example. The number of moles of ethylene oxide to be polymerized is not particularly limited. In the present specification, “(meth) acryl” means both “acryl” and “methacryl”.

  Specifically, alkyl acrylate / methacrylic acid polyoxyethylene cetyl ether copolymer, alkyl acrylate / methacrylic acid polyoxyethylene stearyl ether copolymer, alkyl acrylate / polyoxyethylene methacrylate polybenethylene ether copolymer Polymer, alkyl acrylate / polyoxyethylene stearyl ether copolymer of itaconic acid, alkyl acrylate / polyoxyethylene cetyl ether copolymer of itaconic acid, alkyl acrylate / polyoxyethylene stearyl ether cross polymer of methacrylate, alkyl acrylate / A neodecanoic acid vinyl cross polymer etc. can be illustrated. These components may be used alone or in appropriate combination of two or more. As the preferred component (B), alkyl acrylate / polyoxyethylene stearyl ether copolymer, alkyl acrylate / polyoxyethylene behenes ether copolymer, alkyl acrylate / polyoxyethylene itaconate It is preferable to use a stearyl ether copolymer, an alkyl acrylate / polyoxyethylene cetyl ether copolymer, and an alkyl acrylate / polyoxyethylene stearyl ether cross-polymer.

The component (B) is usually used after neutralizing with a basic substance. Examples of the basic substance include alkanolamines such as triethanolamine and monoethanolamine, inorganic bases such as ammonia, sodium hydroxide and potassium hydroxide, and basic amino acids such as arginine. Moreover, the addition amount of a basic substance is an amount sufficient to neutralize the component (B) , and may be appropriately blended according to the type and use amount of these components.

  The content of the component (B) is not particularly limited as long as a desired effect is imparted, but is usually preferably 0.01% by weight or more, more preferably from the viewpoint of making it semi-solid. It is 0.1% by weight or more. Moreover, from a viewpoint of making discharge from a container favorable, 3 weight% or less is preferable, More preferably, it is 2 weight% or less. From these viewpoints, the content of the component (B) is preferably 0.01 to 3% by weight, more preferably 0.1 to 2% by weight.

  In addition, a commercial item can also be used for the said (B) component. Commercially available products of (meth) acrylic acid / (meth) acrylic acid alkyl / (meth) acrylic acid polyoxyethylene alkyl ether copolymer include, for example, Acrine 22, 28 (trade names, both of which are Rohm and Haas) For example). Examples of commercially available (meth) acrylic acid / (meth) acrylic acid alkyl / itaconic acid polyoxyethylene alkyl ether copolymers include STRUCTURE 2001, 3001 (trade names, both manufactured by National Starch). Can do. Examples of commercially available products of (meth) acrylic acid / alkyl (meth) acrylate / polyoxyethylene alkyl ether (meth) acrylate crosspolymer include Aculin 88 (trade name, manufactured by Rohm and Haas). can do.

  The content of the component (C) is preferably 15% by weight or more, more preferably 18% by weight or more in the composition from the viewpoint of imparting shape retention stability. Moreover, from a viewpoint of suppressing the discharge failure from a container, 30 weight or less is preferable, More preferably, it is 27 weight% or less. From these viewpoints, the content of the component (C) is preferably 15 to 30% by weight, more preferably 18 to 27% by weight. In addition, although the molecular weight of (C) component is not specifically limited, A thing with an average molecular weight of 200-4000 can be used conveniently.

Further, the semi-solid cleanser composition of the present invention, Ru is contained (D) a cellulosic thickening polymers. Cellulosic thickening polymer used, for example, carboxymethyl cellulose, sodium carboxymethyl cellulose, hydroxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxypropyl methylcellulose, methylcellulose, Echiruserosu, nitrocellulose, be exemplified etc. crystalline cellulose it can. These components may be used alone or in appropriate combination of two or more .

The content of the component (D) is not particularly limited as long as a desired effect is imparted, but usually 0.01% by weight or more is preferable in the composition from the viewpoint of improving shape retention stability. Preferably it is 0.1 weight% or more. Moreover, from a viewpoint of making discharge from a container favorable, 3 weight% or less is preferable, More preferably, it is 2 weight% or less. From these viewpoints, the content of the component ( D ) is preferably 0.01 to 3% by weight, more preferably 0.1 to 2% by weight.

  The semi-solid facial cleansing composition according to the present invention has ethylene glycol, propylene glycol, dipropylene glycol, 1,3-butylene in addition to the components described above as long as the effects of the present invention are not impaired. Glycerol, glycerin, concentrated glycerin, diglycerin, triglycerin, glucose, maltose, maltitol, sucrose, mannitol, sorbitol, 1,2-pentanediol, 1,2-hexanediol, 1,2-octanediol and the like ( C) Polyhydric alcohols other than ingredients, refreshing agents such as l-menthol, surfactants, antioxidants, sequestering agents, silicones, vitamins, animal and plant extracts, pearling agents, coloring agents, scrub agents, various A fragrance, a preservative, water, and the like may be appropriately blended depending on the purpose.

  The product form of the semi-solid face cleansing composition of the present invention is not particularly limited, but may be a product form filled in a pump container, a tube container or the like. Especially, it is preferable to set it as the product form by the tube container which is excellent in the discharge property of a semisolid agent.

  EXAMPLES Hereinafter, although this invention is demonstrated further in detail based on an Example, this invention is not limited only to these Examples. The blending amount represents “% by weight” unless otherwise specified.

(Sample preparation)
According to the composition described in Table 1 and Table 2, the composition for semi-solid face wash of Examples 1-5 and Comparative Examples 1-5 was prepared, and it used for the following evaluation test. The results are shown in Table 1 and Table 2, respectively.

(Test Example 1; Evaluation of shape retention stability)
The semi-solid facial cleansing composition obtained in each Example and each Comparative Example was filled into a wide-mouthed container, stored in a thermostatic bath at −3 ° C., 25 ° C. and 40 ° C. for 2 weeks, and the state of the system was visually observed. Observed and evaluated according to the following evaluation criteria.

<Evaluation criteria for shape retention stability>
A: The paste-like shape is retained. O: The paste-like shape is retained, but slight solidification or separation is observed on the surface. Δ: The paste-like shape is not retained and is apparent on the surface. Solidified, or liquid separation or liquid mobilization is observed x: solidified or separated

(Test Example 2; Evaluation of ejection properties)
The semi-solid facial cleansing composition obtained in each example and each comparative example was filled in a tube container, stored in a thermostatic bath at -3 ° C, 25 ° C, and 40 ° C for 2 weeks, and then discharged from the tube container. The sex was evaluated according to the following evaluation criteria.

<Evaluation criteria for ejection performance>
○: Easy to discharge Δ: Difficult to discharge ×: Cannot be discharged due to solidification, or leaks from the discharge port due to separation

  From the results of Table 1 and Table 2, the semi-solid face cleansing composition of each example maintained a semi-solid form in a wide temperature range as compared with those of each comparative example, and was excellent. It can be seen that the formulation has shape retention stability and is excellent in dischargeability from the tube container.

  Hereinafter, formulation examples of the composition for a semi-solid facial cleanser according to the present invention will be shown. In addition, a compounding quantity is weight%.

(Prescription Example 1)
Lauric acid 5.5
Myristic acid 5.5
Palmitic acid 3.5
Stearic acid 9.0
Polyethylene glycol monostearate (150 EO) 5.0
Alkyl acrylate / methacrylic acid polyoxyethylene stearyl ether copolymer 1.0
Polyethylene glycol 400 20.0
Hydroxymethylcellulose 0.5
Propylene glycol 3.0
Concentrated glycerin 10.0
Potassium hydroxide 5.0
1-menthol appropriate amount edetate salt appropriate amount plant extract extract appropriate amount perfume appropriate amount
Purified water balance part Total 100.0

(Prescription example 2)
Lauric acid 5.0
Myristic acid 6.0
Palmitic acid 4.0
Stearic acid 9.0
Polyethylene glycol distearate (150 EO) 5.0
Alkyl acrylate / Itaconic acid polyoxyethylene cetyl ether copolymer
1.0
Polyethylene glycol 1500 20.0
Hydroxypropyl cellulose 0.5
Dipropylene glycol 4.0
Glycerin 8.0
Potassium hydroxide 5.0
Edetic acid salt Appropriate amount Plant extract Extract Appropriate amount Fragrance Appropriate amount
Purified water balance part Total 100.0

  The semi-solid face cleansing composition of the present invention has excellent shape-retaining stability with no solidification and separation of the preparation in a wide temperature range from low temperature to high temperature, maintaining a semi-solid form, and good Since it can be discharged, it can be suitably used as a facial cleanser in a bathroom or bath tub where the temperature changes greatly.

Claims (2)

(A) higher fatty acid salt, (B) (meth) acrylic acid / alkyl (meth) acrylate / (meth) acrylic acid polyoxyethylene alkyl ether copolymer, (meth) acrylic acid / alkyl (meth) acrylate / At least one selected from the group of itaconic acid polyoxyethylene alkyl ether copolymer and (meth) acrylic acid / (meth) alkyl acrylate / (meth) acrylic acid polyoxyethylene alkyl ether crosspolymer , ( C) polyethylene glycol And (D) carboxymethylcellulose, sodium carboxymethylcellulose, hydroxymethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose, methylcellulose, ethylcellulose, nitrocellulose Containing at least one selected from the group of cellulose and crystalline cellulose ,
The said (A) component contains 10-30 weight% in a composition as a higher fatty acid, The composition for semi-solid face wash characterized by the above -mentioned.   (C) Content of a component is 15-30 weight%, The composition for semi-solid face wash of Claim 1 characterized by the above-mentioned.