JPH07188557A - Organopolysiloxane emulsion, its production and shampoo composition containing the same - Google Patents

Abstract

PURPOSE:To obtain an organopolysiloxane emulsion, comprising a specific organopolysiloxane, a specified anionic surfactant and water in a specific proportion, having a prescribed average particle diameter, excellent in adhesion to hair, shampoo stability and touch and suitable as a shampoo composition, etc. CONSTITUTION:This emulsion essentially comprises (A) 10-90wt.% organopolysiloxane, expressed by the formula [R<1> is a 1-20C (substituted) monovalent organic group; (a) is 1.8-2.2] and having 5-1000000 cat viscosity at 25 deg.C, (C) 0.5-50 pts.wt. [based on 100 pts.wt. component (A)] one or two or more anionic surfactants selected from alkyl sulfates, alkylbenzenesulfonates, dialkylsulfosucciniates, alkylsulfonates, etc., and (C) the remainder of water and has 3-100mum average particle diameter. Furthermore, this shampoo composition is obtained by comprising 0.1-20wt.% emulsion therein.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to organopolysiloxane emulsifiers and shampoo compositions containing them.
In particular, the present invention relates to a shampoo composition that can be easily attached to hair, can give good conditioning properties and combability to hair, and can impart softness, feel and the like.

[0002]

BACKGROUND OF THE INVENTION Known shampoo compositions include detergent compositions containing fatty acid soaps, alkylbenzene sulfonates, alkyl sulphates, alkyl ether sulphates, monoglycerin sulphates, alkyl phosphates, methyl taurides and fatty acid alkanolamides. However, if you wash your hair with this type of shampoo composition, natural oil is removed along with dirt and unnecessary oil, so if you wash this hair frequently, natural oil will be excessively removed. As a result, it becomes difficult to comb and assemble hair, and the increase in static electricity causes a disadvantage of becoming dull.

Therefore, a method for recovering such a condition of hair by adding a cationic conditioning agent is also known for this, and this cationic preparation is certainly useful for conditioning the hair. This has the disadvantage of leaving a residue on the hair that causes the hair to lose its luster after drying. It has also been proposed to add a non-volatile silicone oil for conditioning the hair, for example, by adding a non-volatile silicone oil having a viscosity of 5 to 600,000 cS at 25 ° C to a shampoo composition, A method has also been proposed in which the composition is sheared with a high shear mixer until the average particle diameter becomes 10 μm or less (see JP-A-61-210022).
With this method, the stability of the particle size is poor and there is a possibility that a defoaming effect may be brought about.

Therefore, regarding this, a shampoo composition prepared by adding a non-volatile silicone oil to an aqueous medium containing various synthetic surfactants or an aqueous medium containing a synthetic anionic surfactant and another quaternary ammonium conditioning agent is used. It has been proposed to add a non-volatile silicone oil therein (see Japanese Patent Publication No. 4-2566, 2567, 38723), and a secondary amide amino acid or an alkyl saccharide-based surfactant is used as a surfactant. However, it has been proposed to add a non-volatile silicone oil to this (JP-A-2-247113, JP-A-4-327520, and JP-A-4-36).
No. 4113), it is also described that an amino-modified silicone oil emulsion is used in part, but most of these are non-volatile silicone oils or non-volatile silicones dissolved in shampoo compositions. This product is added and blended together with other components, and this has a problem in the dispersibility of silicone, and the silicone is often separated and the foamability of shampoo is often impaired.

[0005]

For this reason, it has recently been proposed to add silicone in the form of an emulsion to a shampoo composition (JP-A-4-36226, JP-A-4-24324).
No. 09), the particle size of silicone dispersed in the silicone emulsion is preferably less than 2 μm, and it is said that a shampoo composition which does not impair foamability can be obtained by using this. It has been proposed to add and blend this emulsion as a silicone microemulsion (JP-A-63-130512, JP-A-5-139).
No. 94, Japanese Patent Laid-Open No. 5-163122), which does not impair the foamability of the shampoo composition and provides a relatively stable product, but in these cases, the particle size is small. It has the drawback that it is easily washed off, its adhesion to hair is reduced, and its conditioning effect is poor.

A composition comprising an anionic surfactant / betaine type double-sided surfactant / silicone dispersion / acrylic resin has been proposed for this purpose (Japanese Patent Laid-Open No. 5-39212).
No.), which has a particle size of the silicone dispersion of 0.05
However, this has a problem that the stability of the composition is impaired depending on the kind of the surfactant used in the silicone dispersion.

[0007]

SUMMARY OF THE INVENTION The present invention relates to an organopolysiloxane emulsion and a shampoo composition containing them for solving the disadvantages, drawbacks and problems of the conventional products. This organopolysiloxane emulsion has (A) the general formula R ¹ _a SiO _{(4-a) / 2}
(Wherein R ¹ is an unsubstituted or substituted monovalent organic group having 1 to 20 carbon atoms, a is 1.8 ≦ a ≦ 2.2), and an organopolysiloxane having a viscosity at 25 ° C. of 5 to 1,000,000 cS 10 to 10 90% by weight, (B) alkylsulfate, alkylbenzenesulfonate, alkylsulfonate, alkylnaphthalenesulfonate, dialkylsulfosuccinate,
One or more anionic surfactants selected from polyoxyethylene fatty alcohol ether sulfate, polyoxyethylene alkylphenyl ether sulfate, polyoxyethylene alkyl phosphate, and polyoxyethylene alkylphenyl phosphate. 0.5 to 50 parts by weight per 100 parts by weight of the component (A) and the balance of water (C), and the shampoo composition contains 0.1 to 20% by weight of the organopolysiloxane emulsion. It is characterized by.

That is, the present inventors have conducted various studies to develop a shampoo composition which has solved the disadvantages and drawbacks of conventional products. As a result, it is assumed that a silicone emulsion is added to a detergent composition. When this silicone emulsion was made into an oil-in-water emulsion having an average particle size of 3 to 100 μm and a large average particle size, the shampoo composition had good adhesion to hair, and the emulsion was anionic surface active. It was found that when emulsified with an agent, it has excellent stability and also has no defoaming property. Therefore, this shampoo composition has good shampoo stability and good foaming property, and it is used. If you shampoo the hair, the amount of adhesion to the hair will increase, and the shampooed hair will be glossy, supple, and not sticky. The present invention was completed to confirm that given the advantage that that. This will be described in more detail below.

This organopolysiloxane is represented by the following general formula (1) and has a viscosity at 25 ° C. of 5 to 1,000,000 c.
S's. This organopolysiloxane has the formula R ¹ _a SiO _{(4-a) / 2} (1) where R ¹ is one selected from unsubstituted or substituted monovalent organic groups having 1 to 20 carbon atoms, or It is composed of two or more kinds of organic groups, and 1.8 ≦ a ≦ 2.2, and R ¹ is methyl group, ethyl group, propyl group, butyl group, pentyl group, hexyl group, octyl group, decyl group, octadecyl group or the like. Aryl groups such as alkyl groups, phenyl groups and tolyl groups, cycloalkyl groups such as cyclopentyl groups and cyclohexyl groups, 3,3,3-trifluoropropyl groups, 3,3,4,4,5,5,6,6 , 6-nonafluorohexyl group, 3,3,4,4,5,5,6,6,7,
Halogenoalkyl groups such as 7,8,8,8,9,9,10,10,10-heptadecafluorodecyl group, or epoxy group, amino group, mercapto group, acryloxy group, methacryloxy group, ester group, fatty acid group, hydroxyl group , An organic group partially containing an ether group,
Of these, the methyl group content is preferably 50 mol% or more.

The organopolysiloxane is selected from non-volatile organopolysiloxanes and volatile organopolysiloxanes, which may be used alone or as a mixture of two or more kinds. As the non-volatile organopolysiloxane, dimethylpolysiloxane and methylphenylpolysiloxane are preferably used, and these are also aminoalkyl group-containing methylpolysiloxane, polyalkyleneoxy group-containing methylpolysiloxane, and aliphatic alcohol group-containing methyl. Polysiloxane, fatty acid group-containing methylpolysiloxane, epoxy group-containing methylpolysiloxane, etc. may be used. Further, examples of the volatile organopolysiloxane include cyclic or chain-like dimethylpolysiloxane and methylphenylpolysiloxane, and those having a boiling point in the range of 100 ° C to 250 ° C at 760 mmHg are preferable. To be done.

If the viscosity of this organopolysiloxane at 25 ° C. is lower than 5 cS, a sufficient conditioning effect cannot be obtained when used as a shampoo composition,
If it is higher than 1,000,000 cS, it will be very sticky when used as a shampoo composition, so 5 to 1,000,0
00cS is required, but the more preferable range is 100 ~
It is 500,000cS.

These organopolysiloxanes are emulsified with an anionic surfactant. The anionic surfactants used here include sodium lauryl sulfate, potassium lauryl sulfate, ammonium lauryl sulfate and triethanol lauryl sulfate. Alkylsulfates such as amines, sodium dodecylbenzene sulfonate,
Alkylbenzenesulfonates such as potassium dodecylbenzenesulfonate and ammonium dodecylbenzenesulfonate, alkylsulfonates, alkylnaphthalenesulfonates, dialkylsulfosuccinates,
Sodium polyoxyethylene lauryl ether sulfate,
Polyoxyethylene lauryl ether ammonium sulfate and other polyoxyethylene fatty alcohol ether sulfates, polyoxyethylene octyl phenyl ether sodium sulfate, polyoxyethylene octyl phenyl ether ammonium sulfate and other polyoxyethylene alkyl phenyl ether sulfates, polyoxyethylene alkyl phosphate It is selected from salts and polyoxyethylene alkylphenyl phosphates, and these may be used alone or as a mixture of two or more kinds, but preferable ones are alkyl sulfates and alkylbenzene sulfonic acid. Salts, polyoxyethylene fatty alcohol ether sulfates, and polyoxyethylene alkylphenyl ether sulfates.

In this organopolysiloxane emulsion, when the content of organopolysiloxane is less than 10% by weight,
Not only is the stability of the emulsion poor, but the amount added to the shampoo composition increases and it is not economical, and if it exceeds 90% by weight, the viscosity of the emulsion becomes large and handling becomes difficult. Therefore, 10 to 90% by weight is required, and more preferably 30 to 70% by weight. Further, the amount of the anion activator blended is required to be 0.5 to 50 parts by weight with respect to 100 parts by weight of the organopolysiloxane. This is less than 0.5 parts by weight,
Even if the amount is more than 50 parts by weight, the stability of the obtained organopolysiloxane emulsion becomes poor, so that the range is set, more preferably 1 to 30 parts by weight, and further preferably 5 parts by weight.
~ 20 parts by weight.

The production of this organopolysiloxane emulsion is carried out by adding an aqueous ionic emulsifier solution to the component A, phase inversion under shearing force, kneading, and then adding and dispersing a predetermined ionic emulsifier and water. . At this time, the amount of the aqueous ionic emulsifier solution for phase inversion is preferably 1 to 20 parts by weight, and particularly preferably 3 to 10 parts by weight, relative to 100 parts by weight of the component A. If it is less than 1 part by weight, phase inversion does not occur and an emulsion cannot be obtained.
If it is more than 20 parts by weight, the particle size of the emulsion becomes coarse and it becomes unstable. The concentration of the ionic emulsifier aqueous solution used here is preferably 5% by weight to 90% by weight, particularly 10% by weight to 50% by weight.
Is preferred. Examples of the emulsifying machine used at this time include a high shear emulsifying machine represented by a homomixer and a colloid mill.

The shampoo composition of the present invention is obtained by adding 0.1 to 20% by weight of the organopolysiloxane emulsion emulsified with an anionic surfactant to the detergent composition as described above. The detergent composition used herein may be any conventionally known one, and therefore, as described above, it may be fatty acid soap, alkylbenzene sulfonate,
It may include alkyl sulfates, alkyl ether sulfates, monochrylide sulfates, alkyl phosphates, methyl taurides, fatty acid alkanolamides, etc., which are used for human and animal hair shampoos. Thus, preferably fatty alcohols or fatty alcohol ethoxylates, especially those derived from lauryl and myristyl alcohol and salts thereof, such as sodium lauryl sulfate, sodium lauryl ether sulfate, ammonium lauryl sulfate, triethanolamine lauryl sulfate. , Monoethanolamine lauryl sulfate, disodium lauryl ethoxy sulfosuccinate and coco monoethanol amide ethoxy sulfosuccinate disodium etc. It is things.

Although the concentration of the detergent composition in the shampoo composition can vary widely depending on the type of shampoo product required, the concentration of the detergent composition described above in the most common shampoo compositions is usually 5-50. Parts by weight,
It is preferably made to be present in the final product in the range of 10 to 25 parts by weight, the balance being composed of water and other additives such as foam stabilizers, preservatives and fragrances.

The shampoo composition of the present invention is obtained by adding 0.1 to 20% by weight of an organopolysiloxane emulsion emulsified with an anionic surfactant to the detergent composition. The organopolysiloxane emulsion is an organopolysiloxane emulsion. It is essentially composed of 10 to 90% by weight of polysiloxane, 0.5 to 50% by weight of anionic surfactant based on 100 parts by weight of the organopolysiloxane, and the balance water. But,
If the average particle size of this silicone emulsifier is less than 3 μm, the adhesion of the shampoo composition to hair is poor, and if it is greater than 100 μm, the stability of the shampoo composition is poor. However, the preferable range is 5 to 50 μm.

The shampoo composition of the present invention is obtained by adding the above-mentioned organopolysiloxane emulsion to the above-mentioned detergent composition. When the amount of addition is less than 0.1% by weight, the conditioning function of this shampoo composition is small. If the amount exceeds 20% by weight, the shampooed hair becomes oily, so this is 0.1-20% by weight.
However, the preferable range is 1 to 10% by weight.

[0019]

EXAMPLES Next, examples of the present invention and comparative examples are shown. In the examples, “parts” means “parts by weight”, and “viscosity” shows measured values at 25 ° C. The stability, foamability, adhesion amount, feel of hair, and shampoo stability of the emulsion are shown by the following methods.

Average particle size measuring method: Measured by using Coulter Counter TA-II (trade name, manufactured by Coulter Electronics Co., USA) Stability of emulsion: Take 100 g of each emulsion in a glass bottle,
The appearance was observed by leaving it in a constant temperature bath at 45 ° C for 30 days. (Evaluation method) ◯: No separation was observed, Δ: There was some separation in the lower layer or the upper layer, x: Complete separation of two layers.

Foamability: 1 ml of a 1% aqueous solution of the prepared shampoo composition was placed in a beaker,
2.5g of lanolin as an artificial stain was added to this, and after heating to 40 ° C, a flat stirring blade was used for 1,000 seconds at 1,000rpm.
Inversion stirring was carried out for 5 minutes every time, and after completion of stirring, the mixture was transferred to a 1-liter female cylinder and the foam volume after standing for 30 seconds was measured. Adhesion amount: Shampoo composition / water = 100g / 400g in a flat beaker with 2 blades, 5g of hair was put into the beaker, and the mixture was stirred for 5 minutes at a rotation speed of 100rpm, then the shampoo liquid was removed and rotated with 500g of water. Several hundred rpm
Wash with water for 3 minutes 3 times to remove water from hair
It was dried with hot air using a dryer and weighed. (Amount of adhesion = dry weight-weight before test).

Feeling of hair: The hair after measuring the adhesion amount was visually evaluated and visually evaluated. Shampoo stability: 100g of shampoo composition is put into a glass bottle and kept in a constant temperature bath at 45 ℃.
It was stored still for 30 days and the appearance was observed. (Evaluation method) ◯: No separation was observed, Δ: Some separation (liquid cracking state) was observed, ×: Separation was observed.

Examples 1 to 5 and Comparative Examples 1 to 3 (Production of Organopolysiloxane Emulsion) An anchor type stirring device capable of stirring the entire container and a circle in which small tooth-shaped protrusions are alternately provided on the upper and lower sides on the periphery. A 5 liter stainless steel compound emulsifier equipped with two types of high shearing agitator with plate type agitator has a viscosity of 500 cS, 60,000 cS, 100,000 c
S, 500,000cS dimethylpolysiloxane or viscosity
A viscosity of 110,0 consisting of 3,000,000 cS dimethylpolysiloxane 30% and the balance decamethylcyclopentasiloxane.
A mixture of 1.4 g of 00cS and 80 g of sodium polyoxyethylene (3EO) lauryl ether sulfate (25% aqueous solution) or a mixture of this and triethanolamine lauryl sulfate (40% aqueous solution) as an aqueous solution of anionic surfactant 8
Charge 0 g, stir this anchor-type stirrer at 40 rpm, disc-type stirrer at 1,500 rpm for 30 minutes to perform phase inversion emulsification, then stop the disc stirrer and balance 60 g of purified water and anionic surfactant. 460 g of polyoxyethylene (3EO) sodium lauryl ether sulfate (25% aqueous solution) was added and homogenized with an anchor type stirrer to obtain the organopolysiloxane emulsions of Examples 1 to 5 shown in Table 1. It was Further, in Comparative Examples 1 to 3, the nonionic surfactant was mixed with the organopolysiloxane, purified water was added to cause phase inversion, and the phase was diluted with purified water to obtain Examples 1 to 5. The emulsion was emulsified in the same apparatus, and its average particle size and stability were examined, and the results shown in Table 1 were shown together.

[0024]

[Table 1]

(Production of shampoo composition) Next, the following components: polyoxyethylene (3EO) sodium lauryl sulfate 16.0%, lauryl sulfate diethanolamide 4.0%, propylene glycol 2.0%, preservative, coloring agent, perfume, appropriate amount, purified water balance . The shampoo composition A shown in Table 2 was prepared by adding the organopolysiloxane emulsion shown in Table 1 in the amount shown in Table 2 and mixing and dispersing with a propeller-type stirrer. -I were prepared, and the foamability, the adhesion amount, the feel of the hair, and the shampoo stability were investigated, and the results shown in Table 2 were obtained.

[0026]

[Table 2]

[0027]

INDUSTRIAL APPLICABILITY The present invention relates to an organopolysiloxane emulsion and a shampoo composition containing them, and as described above, this organopolysiloxane emulsion has (A) the general formula R ¹ _a SiO _{(4-a). ) / 2} (wherein R ¹ is an unsubstituted or substituted monovalent organic group having 1 to 20 carbon atoms, and a is 1.8 ≦
a ≦ 2.2), the viscosity at 25 ° C is 5 to 1,000,
10-90% by weight of organopolysiloxane which is 000 cS,
(B) Alkyl sulfate, alkyl benzene sulfonate, alkyl sulfonate, alkyl naphthalene sulfonate, dialkyl sulfosuccinate, polyoxyethylene fatty alcohol ether sulfate, polyoxyethylene alkylphenyl ether sulfate, polyoxyethylene alkyl One or more anionic surfactants selected from phosphates and polyoxyethylene alkylphenyl phosphates per 100 parts by weight of component (A).
The shampoo composition is characterized by comprising 0.5 to 50 parts by weight and (C) the balance of water, and the shampoo composition contains 0.1 to 20% by weight of the organopolysiloxane emulsion. The composition has excellent shampoo stability, good foamability, and when shampooing hair with this, the adhesion of the shampoo composition to the hair is good, the hair becomes glossy, and suppleness is given,
The advantage is that the stickiness is eliminated.

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Claims (3)

[Claims] 1. An organopolysiloxane emulsion essentially consisting of the following components (A) to (C) and having an average particle diameter of 3 to 100 μm. (A) General formula R ¹ _a SiO _{(4-a) / 2} (wherein R ¹ is one or more selected from unsubstituted or substituted monovalent organic groups having 1 to 20 carbon atoms. An organic group, and 1.8 ≦ a ≦ 2.2),
10 to 90% by weight of organopolysiloxane having a viscosity of 5 to 1,000,000 cS at 25 ° C., (B) alkyl sulfate, alkylbenzene sulfonate, alkyl sulfonate,
1 selected from alkyl naphthalene sulfonate, dialkyl sulfosuccinate, polyoxyethylene fatty alcohol ether sulfate, polyoxyethylene alkylphenyl ether sulfate, polyoxyethylene alkyl phosphate, polyoxyethylene alkylphenyl phosphate Or two or more anionic surfactants (A)
0.5 to 50 per 100 parts by weight of ingredient
Weight part, (C) water balance 2. An aqueous solution of component (A) / component (B) of said organopolysiloxane emulsion = 100/1 to 100
/ 20 (weight ratio) is subjected to phase inversion emulsification and further diluted with an aqueous solution of component (B) and / or water to produce an organopolysiloxane emulsion. 3. A shampoo composition comprising 0.1 to 20% by weight of the organopolysiloxane emulsion according to claim 1.