JP2003055165A - Opaquer and method for producing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for producing an opaquer and obtain the opaquer by the method. SOLUTION: The method for producing the opaquer is to micronize a composition comprising (A) a fatty acid glycol ester, (B) a surfactant and (C) water. The opaquer is obtained by the same method.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a method for producing an opacifying agent and an opacifying agent obtained by the method. In the present invention, the term "opaque" means to give a shampoo, shower gel, liquid detergent, etc., a dull, milky appearance (matte color).

[0002]

2. Description of the Related Art Additives are used in liquid products (for example, shampoos and shower gels) used for washing the body and hair in order to improve the aesthetic appearance and to give a high-grade appearance.
For example, a pearling agent such as ethylene glycol distearate and a linear dicarboxylic acid diester that disperses crystals in a detergent composition to give a pearly luster is one of the representative ones.

On the other hand, an additive which gives a dull, milky appearance (matte color) is called an opacifying agent. Since the opacifying agent used in detergents is used as a component of the composition, it is essential that it not at least interfere with the beneficial properties of the detergent. Its beneficial properties are that it does not impair detergency, that it is compatible and sufficiently stable in the prepared detergent composition, that it has sufficient foaming properties, and that it is low on skin. It is irritating and excellent in biodegradability.

As the opacifying agent, a dispersion in which an inorganic powder, a polyvalent metal salt of a surfactant, polystyrene or the like is finely divided into particles having an average particle size of 0.01 to 1 μm has been proposed. However, these have drawbacks such as separation due to the difference in specific gravity from the dispersion medium, and the lack of a high-quality appearance that satisfies consumers. A system in which an oil agent is emulsified has also been proposed, but it has a drawback that it is insufficient in stability against temperature and easily causes aggregation and separation.

Further, a method of dispersing plate crystals of ethylene glycol distearate has been proposed, but the same component as such a pearlizing agent, an opacifying agent prepared by the production method, is added to a detergent. When it is prepared, it is difficult to say that it is sufficiently satisfactory because it is difficult to obtain a high-quality color tone such as a poor shielding feeling or a pearly luster remaining. Further, the opacifying agent in the form of a concentrated liquid that can be added to the detergent composition at a low temperature has a drawback that it has a high viscosity, has no fluidity, and is difficult to handle.

[0006]

SUMMARY OF THE INVENTION The present invention provides a rich liquid opacifying agent that can impart an excellent matte color appearance to a detergent, is easy to handle, and does not interfere with the beneficial properties of the detergent. An object of the present invention is to provide a method for producing an agent and an opacifying agent therefor.

[0007]

Means for Solving the Problems As a result of intensive studies to solve the above problems, the present inventors have made a composition containing a fatty acid glycol ester, a surfactant and water into fine particles by an emulsifying and dispersing device or the like. As a result, it was found that an opacifying agent having a shielding property can be obtained by completely suppressing gloss, and the present invention was completed based on this finding.

That is, the present invention provides a method for producing an opacifying agent, which comprises subjecting a composition containing (A) a fatty acid glycol ester, (B) a surfactant and (C) water to fine particles. Further, the method of the present invention, wherein the composition is
(A) 5 to 40% by weight of fatty acid glycol ester,
(B) Surfactant 5-40% by weight, (C) Water 25-90
It contains wt%. In the method of the present invention, the fatty acid glycol ester is a derivative of a fatty acid having 12 to 24 carbon atoms.

In the method of the present invention, the surfactant is
Anionic surfactant 0 to 20% by weight, amphoteric surfactant 0
˜20% by weight, nonionic surfactant 0 to 20% by weight (however, not all the surfactants are 0). Further, in the method of the present invention, the average particle size after the fine particle treatment is 0.1 to 1 μm. The present invention further provides an opacifying agent obtained by any of the above methods.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Fatty Acid Glycol Ester The fatty acid glycol ester used in the present invention is not particularly limited as long as it is solid at room temperature, but is preferably derived from a fatty acid having 12 to 24 carbon atoms. It is a fatty acid glycol ester. For example, fatty acid ethylene such as ethylene glycol monopalmitate, ethylene glycol monostearate, ethylene glycol monoisostearate, ethylene glycol monobehenate, ethylene glycol dipalmitate, ethylene glycol distearate, ethylene glycol dinoisostearate, and ethylene glycol dibehenate. Glycols; fatty acid diethylene glycols such as diethylene glycol monopalmitate, diethylene glycol monostearate, diethylene glycol monoisostearate, diethylene glycol monobehenate, diethylene glycol dipalmitate, diethylene glycol distearate, diethylene stearate, diethylene glycol dibehenate; monopalmi Acid triethylene glycol, tristearic acid monoethylene glycol, monoisostearic acid triethylene glycol, monobehenic acid triethylene glycol, dipalmitic acid triethylene glycol, distearic acid triethylene glycol, diisostearic acid triethylene glycol, dibehenic acid triethylene glycol And fatty acid triethylene glycol and the like. Among these, ethylene glycol dipalmitate, ethylene glycol distearate and diethylene glycol distearate are preferred, and ethylene glycol distearate is particularly preferred.

These fatty acid glycol esters are preferably contained in the opacifying agent of the present invention in an amount of 5 to 40% by weight, more preferably 10 to 25% by weight.
If it is less than 5% by weight, when applied to the cleaning composition,
It is not practical because it needs to be used in a large amount, and when it exceeds 40% by weight, the viscosity of the opacifying agent becomes high and gels, which may make it difficult to form fine particles by an emulsifying and dispersing device. is there.

Surfactant The surfactant used in the present invention has a role as an emulsifying dispersant for the above-mentioned fatty acid glycol ester during the production of the opacifying agent, and thereafter, the detergent to which the opacifying agent is applied. It is more desirable that the composition also has a function as a cleaning active ingredient depending on the use of the composition and the like, and as these active agents, anionic surfactants, amphoteric surfactants and nonionic surfactants are preferable, and 1 type or Two or more kinds can be mixed and appropriately selected.

Examples of the anionic surfactant used in the present invention include sulfonates such as α-olefin sulfonates, alkylbenzene sulfonates, alkyloyl isethionates, polyoxyethylene alkyl sulfates, alkyl carboxylates, mono- or dialkyl phosphates, and the like. Mention may be made of sulfates, carboxylates, phosphates and salts thereof. Among these, alkyloyl isethionate and polyoxyethylene alkyl sulphate are preferable, and as the salt, alkali metal salts such as sodium and potassium, ammonium salts, monoethanolamine salts, diethanolamine salts, triethanolamine salts and the like organic salts. Amine salts are preferred.

Examples of the amphoteric surfactant used in the present invention include betaine-based surfactants such as imidazolium betaine, carbobetaine, and sulfobetaine, and a carbon number of 1
Examples thereof include tertiary amine oxides having 0 to 18 alkyl groups or alkenyl groups.

As the nonionic surfactant used in the present invention, polyoxyethylene alkyl (C10-C18) ether having an average addition mole number of 3 to 30 moles, fatty acid (C10-C18) diethanolamide, fatty acid (C1
0-C18) monoethanolamide, alkyl (C10
-C18) polyglucoside etc. are mentioned.

The surfactant used in the present invention can be appropriately selected and blended depending on the requirements as a cleaning component for shampoos, shower gels, etc. to be applied thereafter, but from the viewpoint of emulsion and dispersion stability, the non-volatile component (105 ° C) is used. After drying for 120 minutes), the anionic surfactant is 0 to 20% by weight, the amphoteric surfactant is 0 to 20% by weight, and the nonionic surfactant is 0 to 2%.
It is preferably 0% by weight. And the total amount of these surfactants is preferably 5 to 40% by weight in terms of nonvolatile content,
If it is less than 5% by weight, the emulsification and dispersibility is poor, and there is a possibility that it cannot be made into fine particles and exhibit a pearly luster. If it exceeds 40% by weight, it becomes difficult to obtain a fluid dispersion.

Water Further, the amount of water used in the present invention is preferably 25 to 90% by weight in the opacifying agent, and particularly 50.
It is preferably contained in an amount of -80% by weight. The amount of water is 25
If it is less than wt%, it is difficult to obtain a stable emulsion dispersion, and if it exceeds 90 wt%, it is difficult to efficiently make fine particles.

Other Ingredients In addition to the above-mentioned ingredients, the opacifying agent of the present invention may further contain perfumes, dyes, preservatives, bactericides, inorganic salts, and chelates, if necessary, as long as the intended effects are not impaired. Ingredients such as agents can be added.

[0019] Preferred method for producing opacifiers TECHNICAL FIELD The present invention the aqueous solution fatty acid glycol ester of the surfactant added, heated above the melting point of the fatty acid glycol ester, melted. Next, the mixture is vigorously stirred by using a stirring device, or an emulsion is prepared by using an emulsifying and dispersing device such as a homomixer and a homogenizer. Then, by cooling and cooling to a temperature not higher than the melting point of the fatty acid glycol ester to precipitate crystals, a crystal dispersion liquid having an average particle diameter of 0.5 to 40 μm and having a white or pearly luster is obtained. The crystal dispersion thus obtained was subjected to a powerful emulsification / dispersion apparatus, for example, a homomixer, a homogenizer, a colloid mill, a pearl mill, an ultrasonic emulsifier, etc., to make the average particle diameter of the crystal 0.
By making the particles finer to 1 to 1.0 μm, a desired emulsion-like (matte color) opacifying agent having excellent glossiness and shielding properties can be obtained. By mechanical emulsification and dispersion treatment,
An opacifying agent that tends to thicken and gel at high concentrations.
It can be converted to a low-viscosity, non-glossy emulsion. The average particle size is preferably 0.1 to 1 μm, particularly 0.2 to
0.7 μm is preferable. Further, it may have a bimodal particle size distribution including a peak of a large particle of 1 to 20 μm in part. In this case, the fraction of particles having a particle size of 0.1 to 1 μm is preferably 50% or more.

In the present invention, it is not always necessary to heat-melt and emulsify, and the solid fatty acid glycol ester is directly emulsified in an aqueous solution of a surfactant by a wet dispersion device such as a colloid mill or a pearl mill. It is also possible to carry out turbid dispersion and to make the fatty acid glycol ester into fine particles for production. The opacifying agent of the present invention can be suitably used for hair products such as hair shampoo, hair rinse, hair treatment, shower gel, body shampoo, liquid detergent and the like.

[0021]

The present invention will be further described with reference to examples, but the present invention is not limited to these examples. Unless otherwise specified,% and parts in the examples represent% by weight and parts by weight.

Example 1 Ethylene glycol distearate 20% Laureth-7 15% Propylene glycol 3% Ion-exchanged water 62%

Ethylene glycol distearate, laureth-7 (polyoxyethylene (7 mol) lauryl ether, manufactured by Rhodia Nika Co., Ltd.), propylene glycol and ion-exchanged water were mixed at 75-80 ° C. with high speed stirring, The ethylene glycol distearate was completely melted. Then, the mixture was cooled to about 70 ° C., using a homomixer (TK ROBO MIX manufactured by Tokushu Kika Kogyo Co., Ltd.)
The mixture was stirred at high speed at 4,000 rpm to give an emulsion. When this emulsion was cooled to room temperature and the particle size was measured, the fraction of particles having an average particle size of 5.38 μm and 0.1 to 1.0 μm was 0.1% (manufactured by Shimadzu Corporation: Measured with SALD1100, the same hereafter). Next, use a homogenizer (APV G
AURIN, 15MR-8TBA) was used to carry out a fine particle dispersion treatment under a pressure of 2.94 × 10 ⁷ Pa, and the average particle diameter was 0.28 μm, and the fraction of particles having a particle size of 0.1 to 1.0 μm was 89. A milky opacifying agent of 7% was obtained. The opacifying agent thus obtained has the required excellent shielding properties, a dull white emulsion-like appearance, and good fluidity, and has a viscosity (BL type viscometer manufactured by Tokimec Co., measurement conditions: 4). No. rotor, 60 rpm, 20 ° C., the same hereinafter) was 400 mPa · s.

Example 2 Ethylene glycol distearate 18% Laureth-7 5% Polyoxyethylene (2 mol) Sodium lauryl ether sulfate (70%) 10% Sodium chloride 0.5% Ion-exchanged water 66.5%

Ethylene glycol distearate, laureth-7, polyoxyethylene (2 mol) sodium lauryl ether sulphate, sodium chloride and ion-exchanged water were mixed at 75-80 ° C. with high speed stirring to completely remove ethylene glycol distearate. Melted. Then about 7
After cooling to 0 ° C, homomixer (Tokushu Kika Kogyo Co., Ltd., T
K ROBO MIX) was stirred at a high speed of 4000 rpm to give an emulsion. When this emulsion was cooled to room temperature and the particle size was measured, the average particle size was 6.93μ.
The particle fraction of m, 0.1-1.0 μm was 34.9%. Next, a homogenizer (APV GAULIN, 1
5MR-8TBA) and pressure 2.94 × 10 ⁷ Pa
The average particle size is 0.38μ.
An emulsifying opacifying agent having a particle fraction of m, 0.1 to 1.0 μm of 85.2% was obtained. The opacifying agent thus obtained had the required excellent shielding properties, the appearance of a dull white emulsion and good flowability, as in Example 1, and the viscosity was 480 mPa · s.

Example 3 Ethylene glycol distearate 30% Laureth-12 10% Polyoxyethylene (2 mol) Sodium lauryl ether sulfate (70%) 2% Ion-exchanged water 58%

Ethylene glycol distearate, laureth-12 (polyoxyethylene (12 mol) lauryl ether, manufactured by Rhodia Nika Co., Ltd.), polyoxyethylene (2 mol) sodium lauryl ether sulfate, and ion-exchanged water are mixed, After preliminarily dispersing at 8,000 rpm with a wet mixing and dispersing machine (Ultra Turrax manufactured by IKA) at room temperature, a sand grind mill (Ashizawa
(Manufactured by ST5TEX-H, manufactured by Kogyo Co., Ltd.) and subjected to fine particle dispersion treatment, and the average particle diameter is 0.37 μm, 0.1 to 1.0 μm.
A milky opacifying agent having a particle fraction of 94.4% was obtained. The opacifying agent thus obtained was the same as in Example 1.
The required excellent shielding properties and a dull white emulsion-like appearance,
It had good fluidity and a viscosity of 350 mPa · s.

Comparative Example 1 Ethylene glycol distearate 20% Laureth-7 15% Propylene glycol 3% Ion-exchanged water 62%

Ethylene glycol distearate, laureth-7 (polyoxyethylene (7 mol) lauryl ether, manufactured by Rhodia Nika Co., Ltd.), propylene glycol, and ion-exchanged water were mixed at high speed at 75-80 ° C. with stirring. The ethylene glycol distearate was completely melted. Then, the mixture was cooled to about 70 ° C., using a homomixer (TK ROBO MIX manufactured by Tokushu Kika Kogyo Co., Ltd.)
The mixture was stirred at high speed at 4,000 rpm to give an emulsion. This emulsion was cooled to room temperature to obtain a slightly glossy white paste liquid. When the particle size of this emulsion was measured, the fraction of particles having an average particle size of 5.26 μm and 0.1 to 1.0 μm was 0.2%, and the viscosity was 2800 mPa · s.

Comparative Example 2 Ethylene glycol distearate 18% Laureth-7 5% Polyoxyethylene (2 mol) Sodium lauryl ether sulfate (70%) 10% Sodium chloride 0.5% Ion-exchanged water 66.5%

Ethylene glycol distearate, laureth-7 (polyoxyethylene (2 mol) sodium lauryl ether sulfate, sodium chloride, and ion-exchanged water were mixed at high speed with stirring at 75 to 80 ° C.) to completely remove ethylene glycol distearate. Melted, then about 7
After cooling to 0 ° C, homomixer (Tokushu Kika Kogyo Co., Ltd., T
K ROBO MIX) was stirred at a high speed of 4000 rpm to give an emulsion. This emulsion was cooled to room temperature to obtain a slightly glossy white paste liquid. The emulsion had an average particle size of 6.75 μm, a fraction of particles of 0.1 to 1.0 μm was 3.42%, and a viscosity of 3500 mPa · s.

Evaluation by shampoo formulation example Polyoxyethylene (2 mol) sodium lauryl ether sulfate (70%) 10% cocoamidopropyl betaine sodium (36%) 5% opacifying agent 10% sodium chloride 2% fragrance, dye, preservation Appropriate amount of ion-exchanged water 73%

A shampoo was obtained by mixing the opacifying agent of Examples 1 to 3 and Comparative Example 1 or 2 with the premixed liquid of shampoo from which the opacifying agent was removed while stirring at room temperature. The shielding properties and appearance of the obtained shampoo were evaluated by the following methods.

Shielding property 1 mL of shampoo was dropped on a black vinyl chloride plate with a dropper, and the degree of see-through was visually evaluated on a scale of 5 to 5 and the results are shown in Table 1. 1: The lower black is clearly visible 2: The lower black is transparent 3: The lower black is slightly transparent 4: The lower black is slightly transparent 5: The lower black is transparent Absent

Appearance 1 mL of shampoo was dropped on a black vinyl chloride board using a dropper, and the appearance was visually evaluated, and the results are shown in Table 1.

[0036]

TABLE 1 shielding蔽resistance Appearance Example 1 5 dull white emulsion-like Example 2 5 dull white emulsion-like Example 3 5 dull white emulsion-like Comparative Example 1 3 gloss Some white pearl luster Comparative example 2 3 Some white luster pearl luster

[0037]

The opacifying agent obtained by the production method of the present invention includes shampoos, shower gels, liquid detergents, etc. which have the appearance of a dull pure white emulsion simply by mixing with a substrate at room temperature. It can be obtained and does not affect its performance.

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 4C083 AB332 AC122 AC182 AC391                       AC392 AC712 AC792 BB01                       BB04 BB05 BB07 BB21 BB41                       CC38 DD02 EE21                 4G065 AA01 AB05Y AB10X AB10Y                       AB12Y AB18Y AB22Y AB38Y                       BA01 BA03 BA05 BA06 BA07                       BA14 BB01 BB06 CA11 CA19                       DA02 EA01 EA03                 4H003 AB31 AD04 DA02 EA19 EB09                       ED02 FA13

Claims (6)

[Claims] 1. (A) a fatty acid glycol ester,
A method for producing an opacifying agent, which comprises subjecting a composition containing (B) a surfactant and (C) water to fine particles. 2. The composition comprises (A) 5 to 40% by weight of fatty acid glycol ester, (B) 5 to 40% by weight of surfactant, and (C) 25 to 90% by weight of water. The method according to claim 1. 3. The method according to claim 1 or 2, wherein the fatty acid glycol ester is a derivative of a fatty acid having 12 to 24 carbon atoms. 4. The anionic surfactant is 0 to 20% by weight, the amphoteric surfactant is 0 to 20% by weight, and the nonionic surfactant is 0 to 20% by weight (however, all the surfactants are Is never zero),
The method according to claim 1. 5. The average particle size after the microparticulation treatment is 0.1.
The method according to any one of claims 1 to 4, wherein the method is 1 to 1 µm. 6. An opacifying agent obtained by the method according to any one of claims 1 to 5.