JPH0672829A - Shampoo composition - Google Patents

Abstract

PURPOSE:To obtain a shampoo composition capable of giving the hair both smoothness and softness, excellent in foamability and foam sustainability by dispersing a nonvolatile silicone in the form of particles having a specific mean diameter followed by combining the resultant dispersion with an anionic surfactant. CONSTITUTION:The objective emulsion type shampoo composition can be obtained by dispersing 0.5-8wt.% of nonvolatile silicone particles 0.2-2mum in mean diameter [esp. pref. a silicone derivative of the formula (R<1> is methyl or phenyl; R<2> is methyl or OH; n is 2400-15000)] followed by formulating the resultant dispersion with 5-30wt.% of an anionic surfactant (esp. pref. a polyoxyethylene alkyl sulfuric ester salt). Besides, formulation of this shampoo composition with 1-30wt.% of a nonionic surfactant (esp. pref. an alkylsaccharide-based surfactant) reduces the stimulativeness of the anionic surfactant, thus being preferable.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is excellent in foaming property when washing hair,
The present invention also relates to an emulsified shampoo composition that imparts excellent smoothness and softness to hair after washing and drying.

[0002]

2. Description of the Related Art Conventionally, anionic surfactants have been frequently used as the base of shampoo compositions. However, although the anionic surfactant is excellent in foaming property and detergency, it has a drawback that it is inferior in smoothness and flexibility of hair after washing and drying.

In order to eliminate such drawbacks, oily silicone is blended in the shampoo composition to provide smoothness (combability).
Attempts have been made to impart softness and flexibility to the hair (JP-A-61-210022, JP-A-62-84198).

However, the addition of oily silicone is
Although the smoothness and flexibility are improved to some extent, they are not sufficient, and there are drawbacks that the ease and sustainability of foaming are reduced.

[0005]

SUMMARY OF THE INVENTION Accordingly, the object of the present invention is to provide the hair after washing and drying with excellent smoothness and softness,
Another object of the present invention is to provide a shampoo composition having excellent foaming property and foam lasting property.

[0006]

In view of such circumstances, the inventors of the present invention have conducted diligent research and as a result, as a result, non-volatile silicone was dispersed as particles having an average particle size of 0.2 to 2 μm, It has been found that a shampoo composition that gives smoothness and softness to hair and is excellent in foamability and foam sustainability can be obtained by the combination with an agent, and completed the present invention.

That is, the present invention comprises the following components (a) and (b): (a) 1 to 50% by weight of anionic surfactant (b) 0.01 to 10% by weight of non-volatile silicone, The non-volatile silicone has an average particle size of 0.2 to 2
The present invention provides an emulsified shampoo composition which is emulsified particles of μm.

The component (a) anionic surfactant used in the present invention is not particularly limited as long as it is generally used in shampoo compositions. Specifically, for example, alkyl sulfate ester salt, polyoxyethylene alkyl sulfate ester salt, alkylbenzene sulfonate, α-olefin sulfonate, α-sulfo fatty acid ester salt,
Examples of the alkyl phosphate ester salt, sulfosuccinate ester salt and the like, among these, alkyl sulfate ester salt, polyoxyethylene alkyl sulfate ester salt, sulfosuccinate ester salt and the like are preferable, in particular, in that it is mild. Polyoxyethylene alkyl sulfate ester salts are preferred.

These anionic surfactants can be used in the shampoo composition of the present invention either singly or as a mixture of two or more, and the compounding amount is from 1 to 50% by weight in the composition,
It is preferably 5 to 30% by weight.

The non-volatile silicone as the component (b) used in the present invention is one or more selected from silicone derivatives and organic silicone resins (silicone gum).

Examples of the silicone derivative include dimethyl silicone, methylphenyl silicone, alcohol-modified silicone, amino-modified silicone, epoxy-modified silicone, fluorine-modified silicone, alkyl-modified silicone and silicone polyether copolymer at 25 ° C.
With a viscosity of 1 million cSt or more, especially the following general formula (1)

[0012]

[Chemical 1]

[Wherein R¹May be the same or different
Represents a methyl group or a phenyl group, R ²Are the same or different
A methyl group or a hydroxyl group which may be present, n is 240
Represented by an integer of 0 to 15000]
A derivative is mentioned as a preferable example. General formula
In consideration of water resistance, n in (1) is conventionally 5000-500.
Although about 15,000 has been used, in the present invention
In addition, water resistance and washing resistance can be obtained even if using lower molecular weight compounds.
You can keep cleanliness. This n is 3000-40
When it is more than 00, it becomes gum-like at room temperature, but this one is also a book.
It can be used in the invention, where light flowing isoparaffin
Dissolved in a suitable solvent such as silicone or low boiling point volatile cyclic silicone
It can also be used. Also, organic silicone resin
For example, the following average formula (2) R³ _mSiO_{(4-m) / 2} (2) [wherein R³Represents a hydrocarbon group having 1 to 6 carbon atoms, and m represents
The number represented by 1.0 to 1.8].
Be done. Such an organic silicone resin is R³ ₃SiO_1/2Unit, R
³ ₂SiO, R³SiO_3/2Unit and SiO unit combined
It has a structure. That is, the siloxane unit is a branch
It has a divided and crosslinked structure.

The silicone derivative and the organic silicone are
Each may be used alone, but these are used in a weight ratio of 2 /
When used together in a ratio of 8 to 6/4, more preferable effects can be obtained.

The content of the non-volatile silicone in the composition of the present invention is preferably 0.01 to 10% by weight, more preferably 0.5 to 8% by weight.

In the composition of the present invention, in order to make the non-volatile silicone have an average particle size of 0.2 to 2 μm, an emulsifying agent is used in an amount of 1 to 15 times the weight of the non-volatile silicone, and the emulsification time is appropriately changed to emulsify. You can do it.

If the particle size of the non-volatile silicone exceeds 2 μm, the foaming property is poor, and if it is less than 0.2 μm, smoothness and softness cannot be sufficiently imparted to the hair, either of which is not preferable. A particularly preferred particle size range is 0.3 to 1.5 μm. The emulsifier used here is polyoxyethylene (hereinafter referred to as "POE") alkyl ether or P.
OE alkyl allyl ether, oxyethylene / oxypropylene block copolymer, sorbitan fatty acid ester, POE sorbitan fatty acid ester, POE sorbitol fatty acid ester, glycerin fatty acid ester, P
OE fatty acid ester, POE alkylamine, POE castor oil, hydrogenated castor oil, alkylalkanolamide,
Examples thereof include polyether-modified silicone, alkyl sulfate ester salt, and POE sulfate ester salt. Among them, POE alkyl ether and POE alkyl allyl ether having an alkyl group having 10 to 28 carbon atoms are particularly preferable.

Specifically, in order to produce non-volatile silicone particles having an average particle size of 0.2 to 2 μm, for example, (1) non-volatile silicone and an emulsifier are uniformly mixed, and a predetermined amount of water or water and POE is added. Add a mixture with alkyl ether or POE alkyl allyl ethers, etc. (2) Mix this mixture thoroughly with a homomixer, homogenizer, colloid mill, etc. (3) Add carriers such as water and ethanol Can be obtained by The volume particle size distribution of the emulsified particles can be measured with Nanosizer.

In the shampoo composition of the present invention, in addition to the above-mentioned components, a nonionic, amphoteric or cationic surfactant can be blended, if necessary, within a range not impairing the effects of the present invention. Above all, it is preferable to add an alkyl saccharide-based surfactant, which is a nonionic surfactant, because the irritation of the anionic surfactant can be reduced.

Examples of such an alkyl saccharide-based surfactant include those represented by the following general formula (3).

R^Four-O- (R^FiveO)_t-(G)_p (3) [in the formula (3), R^FourIs a linear or branched chain having 6 to 18 carbon atoms
A branched chain alkyl, alkenyl or alkylphenyl group
Show, R^FiveRepresents an alkylene group having 2 to 4 carbon atoms, and G represents
Indicates a reducing sugar having 5 to 6 carbon atoms, and t indicates a number of 0 to 10.
However, p shows the number of 1-10. ] Represented by general formula (3)
Among the alkyl saccharide-based surfactants mentioned above, R
^FourIs an alkyl group having 6 to 18 carbon atoms, particularly 6 to 12 carbon atoms (octyl).
Those having a tyl group, a decyl group, a lauryl group, etc.) are preferred.
Yes. t is the degree of condensation of alkylene oxide and is 0 to 10
The number is shown, but t is 0-4, especially 0
Is preferred. The reducing sugar represented by G is glucose,
Galactose and fructose are preferred. Also, Sucka
The average degree of polymerization of the ride is 1 to 10, but especially p is
It is preferably 1 to 4. This average degree of polymerization p is R
^FourIt is desirable to select in consideration of the physical properties derived from the hydrophobic group of
Correctly, for example, R^FourIs a hydrophobic group having an average carbon number of 8 to 11.
If p is 1 to 1.4, R^FourHas an average carbon number of 12 to 1
When the hydrophobic group is 4, p is selected from 1.5 to 4.0
Is preferred. The average degree of sugar polymerization is determined by proton NMR.
Can be asked.

The shampoo composition of the present invention may further contain, if necessary, components used in the shampoo composition. Examples of such components include foaming agents, ultraviolet absorbers, preservatives, bactericides, various solvents, anti-dandruff agents, antioxidants, pigments and fragrances.

In order to produce the shampoo composition of the present invention, the anionic surfactant of the component (a) may be mixed with the emulsion of the component (b).

[0024]

EFFECTS OF THE INVENTION The shampoo composition of the present invention is excellent in foaming property and foam lasting property, and imparts excellent smoothness and softness to hair after washing and drying.

[0025]

The present invention will be described in more detail with reference to the following examples, but the present invention is not limited thereto.

In the following examples, each composition was evaluated by the following methods and standards.

1 Foamability and foaming amount 0.5% by weight of wool grease was added to 100 ml of a 1% water-containing detergent composition, which was placed in a graduated cylinder equipped with a rotating machine at 40 ° C. for 30 minutes. After stirring for 2 seconds and 5 minutes, the foamability and the foaming amount were evaluated. Foamability / Evaluation Criteria (after stirring for 30 seconds) A: 80 ml or more B: Within 60-80 ml C: 40-60 ml Within D: 40 ml or less Foaming amount / Evaluation Criteria (after stirring for 5 minutes) A: 180 ml or more B : Within the range of 160-180 ml C: Within the range of 120-160 ml D: 120 ml or less 2 Smoothness of combed hair and softness due to touch The hair of a Chinese female healthy person with a weight of 30 g and a length of 25 cm,
Wash with 1 gram of detergent. After 1 minute, after the cleaning agent foamed, rinse for 30 seconds, twist with a towel to dry,
Dry again with a dryer. Then, the evaluation was performed by the inspector according to the following criteria. Evaluation Criteria: Comb Comb Smoothness of Hair A: Comb easily. B: It can be easily combed. C: Combing is not easy. Flexibility by touch A: Very flexible. B: Somewhat flexible. C: Not flexible.

Example 1 A shampoo composition having the composition shown in Table 1 was prepared and tested for foaming power, foaming amount, smoothness of combed hair and softness by touch. The results are shown in Table 1.

In the production, first, dimethylpolysiloxane, POE (7) lauryl ether, POE (3) sodium lauryl ether sulfate and water are emulsified using a homomixer, and other ingredients are mixed with this emulsion. I went. Also, a comparative product was prepared by mixing dimethylpolysiloxane and other components together.

[0030]

[Table 1]

Example 2 Shampoo compositions having the compositions shown in Table 2 were prepared with various emulsion particle sizes. The results are shown in the table.

[0032]

[Table 2]

Example 3 A shampoo composition was prepared in the same manner by using 1.5% by weight of dimethylpolysiloxane and 1.5% by weight of silicone gum in place of 3% by weight of dimethylpolysiloxane of the product 1 of the present invention in Example 1. And evaluated. All evaluation items were A.

Example 4 A shampoo composition having the following composition was prepared.

[0035]

(Table 3) (wt%) (1) polyoxyethylene (2) lauryl ether sodium sulfate 10 (2) decyl glucoside (p average = 1.2) 10 (3) lauric acid diethanolamide 2 (4) dimethyl laurate Amine oxide 0.5 (5) Ethylene glycol distearate 2 (6) Dimethylpolysiloxane emulsion 2 (wt%) Dimethylpolysiloxane (Shin-Etsu Chemical Co., Ltd., viscosity 10 million cSt / 25 ° C) 40 POE (1) lauryl ether 2 POE (3) Sodium lauryl ether sulfate 2 Purified water balance (7) Polymer JR-400 (manufactured by Union Carbide Co.) 0.3 (8) Perfume 0.5 (9) Dye trace amount (10) Purified water balance

This product had excellent foamability and detergency, and gave an excellent feel to hair.

Example 5 An antidandruff shampoo having the following composition was prepared.

[0038]

(Table 4) (wt%) (1) polyoxyethylene (2) lauryl ether ammonium sulfate 18 (2) lauryl glucoside (average = 2) 2 (3) lauric acid diethanolamide 1 (4) ethylene glycol distearate 3 (5 ) Pylactone auramine (Octopyrox) 1 (6) Dimethylpolysiloxane emulsion (particle size 1.0 μm) (same as in Example 4 (6)) 2 (7) Perfume 0.2 (8) Dye trace amount (9 ) Purified water balance

This antidandruff shampoo was extremely mild to the skin and was excellent in preventing dandruff and the effect of the present invention.

Claims (4)

[Claims] 1. The following components (a) and (b): (a) 1 to 50% by weight of anionic surfactant (b) 0.01 to 10% by weight of non-volatile silicone, and the non-volatile silicone. Has an average particle size of 0.2 to 2
An emulsifying shampoo composition which is emulsified particles of μm. 2. A nonionic surfactant (c) is further added in an amount of 1 to
The emulsified shampoo composition according to claim 1, which comprises 30% by weight. 3. The emulsifying shampoo composition according to claim 2, wherein the nonionic surfactant is an alkyl saccharide-based surfactant. 4. The method for producing an emulsified shampoo composition according to claim 1, wherein the non-volatile silicone is emulsified and dispersed in water using an emulsifier, and then an anionic surfactant is mixed.