JP2587535B2 - Pearl shampoo composition - Google Patents

Description

The present invention relates to a shampoo composition, and more particularly to a hair having excellent hair conditioning properties (combability, smooth feeling, gloss, hair cohesion, etc.). Pearl shampoo composition.

2. Description of the Related Art It has been well known that high-molecular dimethyl silicone is effective in preventing hair damage due to hair washing. However, the polymer dimethyl silicone is insoluble in water and has a specific gravity lower than that of water, so that stable blending is difficult. Therefore, a method of stabilizing a polymer dimethyl silicone by using it in combination with xanthan gum (US Pat.
No. 458) has been proposed, but this method significantly impairs the foaming power and, because of the large particle size of the silicone in the shampoo, some of the high-molecular dimethyl silicone is 40 to 50%.
There is a problem of liberation at a temperature of ° C.

In order to solve such a problem, a technique for emulsifying high-molecular dimethyl silicone has recently been developed (Japanese Patent Laid-Open No.
No. 183517).

On the other hand, in recent years, consumers have been educated about hair damage, and demand for pearl-like shampoos that have been given a pearl-like luster by ethylene glycol stearate is increasing with the heightened awareness of hair care. When a large amount of an emulsion of dimethyl silicone obtained by the above technology is added to a simple shampoo in order to improve the hair conditioning property on the hair, the pearl separation occurs, especially when the content becomes 0.01% by weight or more in terms of dimethyl silicone. There is.

Problems to be Solved by the Invention The present inventors have intensively studied to prevent pearl separation in a pearl shampoo composition containing a large amount of an emulsion of high-molecular dimethyl silicone. as a result,
Surprisingly, they have found that pearl separation can be effectively prevented by using a mixture of certain ester compounds in combination.

Means for Solving the Problems The present invention provides: Wherein R ₁ and R ₂ are CH ₃ or H, and n is an integer of 4000 to 9000. A dimethyl silicone emulsion represented by the following formula: 0.01 to 1% by weight in terms of dimethyl silicone, and (ii) _{formula: R 1 -COO-CH 2 CH} 2 -OOC-R 1 [II] [ in the formula, R ₁ denotes an alkyl group having 11 to 17 carbon atoms] and an ester compound represented by the formula: R ₁ - COO—CH ₂ CH ₂ —OH [III] wherein R ₁ represents an alkyl group having 11 to 17 carbon atoms, and a mixture of ester compounds represented by the formula: 0.1 to 3% by weight. A pearl shampoo composition is provided.

Representative examples of the dimethyl silicone represented by the formula [I] used in the shampoo composition of the present invention include, for example, Toshiba Silicone TSE-200, TSE-200A, and the like, alone or in combination of two or more. And preferably 0.01 to 1% by weight, preferably 0.1 to 1% by weight based on the total amount of the shampoo composition
% By weight. If the amount is less than 0.01% by weight, the hair conditioning property is not sufficiently imparted to the hair. On the other hand, if the amount exceeds 1% by weight, the foaming property is impaired. In the present invention, the dimethyl silicone is blended in the form of an emulsion. That is, a mixture obtained by mixing and emulsifying an aqueous mixture of a water-soluble polyhydric alcohol and a surfactant with the dimethyl silicone of the formula [I] and, if desired, an oil phase comprising other oil components is blended. As a water-soluble polyhydric alcohol, has two or more hydroxyl groups in the molecule,
Those which are transparently dissolved in water, for example, propylene glycol, 1,3-butylene glycol, isoprene glycol, ethylene glycol, glycerin, sorbitol,
Xylitol, dipropylene glycol, diethylene glycol, diglycerin, polyethylene glycol, polyglycerin, ethylene glycol monoethyl ether, ethylene glycol dimethyl ether and the like can be mentioned. Examples of the surfactant include anionic surfactants such as lauryl sulfate, linear alkylbenzene sulfonate, polyoxyethylene lauryl ether sulfate, α-olefin sulfonate, polyoxyethylene lauryl sulfosuccinate, and stearyl trimethyl. Cationic surfactants such as ammonium salt, cetyltrimethylammonium salt, benzyltrimethylammonium salt, dicetyldimethylammonium salt, dibenzyldimethylammonium salt, etc .; Amphoteric surfactant, fatty acid glycerin ether, sorbitan fatty acid ester, sucrose fatty acid ester, polyoxyethylene alkyl ether, pluronic surfactant, polyoxyethylene fatty acid Ester, nonionic surfactants such as polyoxyethylene sorbitan fatty acid esters. The oily component that may be added to the oil phase includes, in addition to the formula [I] dimethyl silicone, low molecular dimethyl silicone, methylphenyl silicone, polyether-modified silicone, cyclic silicone, liquid paraffin,
Primary alcohols, squalane, squalene, fatty acid ester oils, liquid triglyceride lanolin and derivatives thereof and the like can be mentioned. These usually contain 10 to 90% by weight of an oil phase, 0.1 to 5% by weight of a water-soluble polyhydric alcohol, and a surfactant.
An emulsion is prepared using 0.5 to 10% by weight with the balance of water being used.
The compounding temperature of such a dimethyl silicone emulsion is preferably 60 ° C. or lower, more preferably 45 ° C. or lower. Above this temperature, the emulsion is destroyed, which affects the stable compounding of silicone.

Examples of the ester compound represented by the formula [II] used in the present invention include ethylene glycol distearate, ethylene glycol dilaurate, and the like.
Examples of the ester compound represented by the formula [III] include ethylene glycol monostearate and ethylene glycol myristate.
More than one species may be used in combination. The compound obtained by mixing and stirring both ester compounds is added in an amount of 0.1 to 3% by weight, preferably 1 to 2% by weight, based on the total amount of the shampoo composition. If the amount is less than 0.1% by weight, the effect of preventing pearl separation cannot be obtained, and if it exceeds 3% by weight, the foaming property is lost, which is not preferable.

Examples of the pearl component include triethylene glycol distearate, palmitic acid monoethanolamide, and the like.

The pearl shampoo composition of the present invention can be produced by mixing and stirring the desired components by a conventional method. In addition, if necessary, the shampoo composition of the present invention includes:
Other additives such as a fragrance, a coloring agent, a preservative, and an anionic surfactant may be further compounded as long as the performance is not impaired.

Examples Next, the present invention will be described in more detail with reference to Examples and Comparative Examples.

Examples 1 to 5 and Comparative Examples 1 to 13 The components shown in Table 1 below were mixed and stirred to obtain a shampoo composition. Using these, the following items were evaluated. The results are shown in Table 1.

(Evaluation method) The evaluation of the test sample was performed by the following method.

Foaming property: 200 ml of a 1% aqueous solution of the shampoo composition was placed in a cylinder, 4 g of oleic acid was added thereto, and the mixture was kept in a thermostat (40).
° C). At this temperature, stirring was carried out at 1500 rpm for 5 minutes using a cutting blade type propeller. The foam amount 30 seconds after the stirring was stopped was measured and evaluated according to the following criteria.

：: foam amount 500 ml or more ×: foam amount less than 500 ml Appearance stability: The sample was left at 55 ° C. for one month, and the appearance was visually evaluated.

：: No change in appearance ×: Change in appearance Usability: A sensory test was conducted by five expert panelists according to the half head method. The feeling after drying was performed after resting at 20 ° C. and 60 RH% for 30 minutes or more. The shampoo composition of Example 3 was used as a control.

：: 3 or more evaluations equal to or higher than the control product ×: 2 or less evaluations equal to or higher than the control product Overall evaluation: ：: All evaluations × ×: At least one evaluation is × Effects of the Invention The shampoo composition of the present invention imparts excellent hair conditioning properties to hair and effectively prevents pearl separation.

Claims (1)

(57) [Claims] (1) Formula (i): Wherein R ₁ and R ₂ are a methyl group or hydrogen, and n is 4000 to
A dimethyl silicone emulsion represented by the following formula: 0.01 to 1% by weight in terms of dimethyl silicone; and (ii) formula: R ₁ —COO—CH ₂ CH ₂ —OOC—R ₁ [II] Wherein R ₁ represents an alkyl group having 11 to 17 carbon atoms, and an ester compound represented by the formula: R ₁ —COO—CH ₂ CH ₂ —OH [III] wherein R ₁ is carbon A pearl-like shampoo composition containing 0.1 to 3% by weight of a mixture of ester compounds represented by the following formulas: