JP2007002062A - Pearlescent ingredient aqueous dispersion and use thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an aqueous dispersion of a pearlescent ingredient, easily mixable with a surfactant compound and capable of imparting excellent pearlescent externals by heating minimally and cooling which requires no complex operation. <P>SOLUTION: The aqueous dispersion of a pearlescent ingredient comprises 35-65 wt.% fatty acid glycol ester of a pearlescent ingredient, 1-15 wt.% amidobetaine and/or an alkyl ether sulfate and water. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a free-flowing aqueous pearlescent component dispersion containing a fatty acid glycol ester as a pearly luster component, and a method for producing a product having pearly luster, particularly an aqueous cleaning composition.

  Often a pearlescent component is included to give the surfactant formulation a visually superior appearance.

  Conventional pearly luster dispersions comprise at least one pearlescent compound, at least one dispersant, and water. In the past, many pearl luster-forming compounds and mixtures of pearl luster-forming compounds have been recommended. Examples include fatty acids, fatty acid metal salts, fatty acid alkanolamides, fatty acids and polyol esters. Examples of the dispersant include alkyl sulfates, alkyl ether sulfates, alkyl sulfonates, betaines, fatty acids added with ethylene oxide and / or propylene oxide, fatty alcohols, and alkyl glucosides.

JP-A-10-182343 discloses an excellent pearly luster high-concentration dispersion liquid that has smooth flowability and is easy to handle. However, in the follow-up test of Examples and the test at 50% concentration of fatty acid glycol ester, In particular, it was found that the viscosity of the dispersion increased and the handling became difficult.
In recent years, the use of alkanolamide components has been reviewed from the viewpoint of safety.
JP-A-10-182343

  An object of the present invention is to provide an aqueous pearl luster component dispersion liquid that can maintain smooth smooth fluidity stably and impart excellent pearl luster to a target product, and a product having pearl luster, particularly a detergent composition. It is in providing the manufacturing method of.

  By mixing a fatty acid glycol ester, which is a pearly luster component, with a certain amount of amide betaine and / or alkyl ether sulfate and water, the smooth free-flowing property is stably maintained and excellent. It has been found that an aqueous pearlescent component dispersion that provides pearly luster can be obtained.

（式中、Ｒ_１およびＲ_２は、相互に独立に、Ｃ_１２〜Ｃ_２２−アルキル基であり、Ａは−Ｃ_２Ｈ_４−または−Ｃ_３Ｈ_６−であり、ｍは１〜１０の数である。）
で表される脂肪酸グリコールエステル ３５〜６５重量％、
Ｂ）
Ｂ−１）
一般式（II）：

（式中、Ｒ_３はＣ_８〜Ｃ_２２−アルキル基であり、Ｒ_４およびＲ_５は、相互に独立に、Ｃ_１〜Ｃ_３−アルキル基であり、ｎは２〜４であり、ｙは１〜３の数である。）
で表されるアミドベタイン、および
Ｂ−２）一般式（III）：

（式中、Ｒ_６はＣ_８〜Ｃ_２２−アルキル基であり、ｘは１〜５の数であり、Ｍはアルカリ金属、アルカリ土類金属、アンモニウムイオンまたはＣ₂〜Ｃ₃−ヒドロキシアルキル置換アンモニウムを示す。）
で表されるアルキルエーテル硫酸塩
からなる群から選択される少なくとも1種の界面活性剤 １〜１５重量％、
並びに
Ｃ）１００重量％までの水
を含んでなることを特徴とする水性真珠光沢成分分散液を提供して、上記目的を達成する。 That is, the present invention
A) General formula (I):

Wherein R ₁ and R ₂ are each independently a C ₁₂ -C ₂₂ -alkyl group, A is —C ₂ H ₄ — or —C ₃ H ₆ —, and m is 1-10. Is the number of
35 to 65% by weight of a fatty acid glycol ester represented by
B)
B-1)
General formula (II):

Wherein R ₃ is a C ₈ -C ₂₂ -alkyl group, R ₄ and R ₅ are each independently a C ₁ -C ₃ -alkyl group, n is 2-4, y Is a number from 1 to 3.)
And B-2) general formula (III):

Wherein R ₆ is a C ₈ -C ₂₂ -alkyl group, x is a number from 1 to 5, and M is an alkali metal, alkaline earth metal, ammonium ion or C ₂ -C ₃ -hydroxyalkyl substituted. Ammonium is shown.)
1 to 15% by weight of at least one surfactant selected from the group consisting of alkyl ether sulfates represented by:
And C) to provide an aqueous pearlescent component dispersion characterized by comprising up to 100% by weight of water to achieve the above object.

In a preferred embodiment of the present invention, the dispersed particles in the aqueous pearlescent component dispersion have an average particle size of 1 to 40 μm, preferably 10 to 35 μm. By setting such an average molecular diameter, an aqueous pearly luster component dispersion liquid that provides smooth and easy flowability and provides excellent pearly luster can be obtained.
In addition, the aqueous pearl luster component dispersion of the present invention can be easily mixed with a surfactant formulation, and imparts an excellent pearly luster appearance to the target product with minimal heating and cooling that does not require complicated operations. Can do.

  The aqueous pearl luster component dispersion of the present invention is based on the total weight of the dispersion, the amount of the fatty acid glycol ester A) represented by the general formula (I) is 35 to 65% by weight, preferably 40 to 60% by weight, And at least one surfactant B selected from the group consisting of the amide betaine B-1) represented by the general formula (II) and the alkyl ether sulfate B-2) represented by the general formula (III) ) In an amount of 1 to 15% by weight, preferably 1 to 7% by weight.

In the above general formula (I), R ₁ and R ₂ are each independently a C ₁₂ -C ₂₂ -alkyl group, preferably a C ₁₆ -C ₂₀ -alkyl group. When the number of carbon atoms of the alkyl group is less than 12, the melting point is lowered and the temporal stability is deteriorated. Moreover, when carbon number exceeds 22, melting | fusing point will become high and it will become impossible to prepare a dispersion liquid.

In the above general formula (I), A is —C ₂ H ₄ — or —C ₃ H ₆ —, preferably —C ₂ H ₄ — (ethylene group).

  In the said general formula (I), m is a number of 1-10, Preferably it is a number of 1-3. When m exceeds 10, pearl luster is not emitted.

  The fatty acid glycol ester A) represented by the general formula (I) is contained in a proportion of 35 to 65% by weight, preferably 40 to 60% by weight, based on the total weight of the dispersion. If the amount of the fatty acid glycol ester exceeds 65% by weight, the dispersion may not be prepared.

In the above general formula (II), R ₃ is a C ₈ -C ₂₂ -alkyl group, preferably a C ₁₀ -C ₂₀ -alkyl group.

In the above general formula (II), R ₄ and R ₅ are each independently a C ₁ -C ₃ -alkyl group.

  In the said general formula (II), n is 2-4.

  In the said general formula (II), y is a number of 1-3.

In the above general formula (III), R ₆ is a C ₈ -C ₂₂ -alkyl group, preferably a C ₁₀ -C ₂₀ -alkyl group.

  In the said general formula (III), x is a number of 1-5, Preferably it is a number of 1-3.

In formula (III), M is an alkali metal (e.g., potassium, sodium, etc.), alkaline earth metal (e.g., calcium, magnesium, etc.), an ammonium ion or C ₂ -C 3 _- represents a hydroxyalkyl-substituted ammonium.

  The aqueous pearl luster component dispersion of the present invention includes an amide betaine B-1) represented by the general formula (II) and an alkyl ether sulfate B-2) represented by the general formula (III). The selected at least one surfactant B) is included in a proportion of 1 to 15% by weight, preferably 1 to 7% by weight, based on the total weight of the dispersion.

  When the amount of the surfactant B) exceeds 15% by weight, the average particle size of the dispersed particles decreases, but the viscosity of the dispersion increases with time and the fluidity decreases. On the other hand, if the amount of the surfactant B) is less than 1% by weight, the viscosity at the time of production becomes high and handling becomes difficult.

  In the aqueous pearl luster component dispersion of the present invention, the average particle diameter of the dispersed aqueous pearl luster component (dispersed particles) is preferably 1 to 40 μm, more preferably 10 to 35 μm. If this average particle size is less than 1 μm, the aqueous dispersion may not be able to give sufficient pearl luster to the product in which it is blended, whereas if it exceeds 40 μm, the fatty acid glycol is used to obtain pearl luster. Heating above the melting point of the ester and cooling conditions must be set, resulting in inefficiency.

  The aqueous pearl luster component dispersion of the present invention can be produced by a conventional emulsification method. The average particle size of the dispersed particles can be adjusted to a particle size in the above preferred range by adjusting the amount of the surfactant. In the production of the aqueous pearl luster component dispersion of the present invention, it is not necessary to use a device for applying a high dispersion force such as a homomixer.

  Pearl luster is obtained by heating below the melting point of the fatty acid glycol ester and passing through a general cooling step. Further, by adjusting the average particle diameter, fine pearl luster and large pearl luster can be obtained, and it is not necessary to adjust the type of fatty acid glycol ester and delicate cooling rate.

  The aqueous pearl luster component dispersion of the present invention is blended with usual additives such as preservatives, ultraviolet absorbers, fragrances, dyes, pigments, medicinal ingredients, and antioxidants, as long as the effects of the present invention are not hindered. be able to.

The aqueous pearl luster component dispersion liquid of the present invention is blended in any aqueous cleaning liquid, for example, shampoo, body soap, facial cleansing foam, etc., to give the aqueous cleaning liquid pearl luster.
The ratio of the aqueous pearl luster component dispersion to the aqueous cleaning liquid is such that the amount of the fatty acid glycol ester A) represented by the general formula (I) is at least 1% by weight based on the total amount of the aqueous cleaning liquid including the aqueous pearl luster component dispersion, Preferably, it is selected to be 1 to 5% by weight.

In order to mix the aqueous pearl luster component dispersion in the aqueous cleaning liquid, a method used for blending ordinary liquid components may be employed.
The conditions during blending are not particularly limited except that the temperature is not higher than the melting point of component A).

  EXAMPLES Next, although an Example is given and this invention is demonstrated, this invention is not limited by these Examples.

Examples 1-3 and Comparative Examples 1-3
<Method for producing aqueous pearl luster component dispersion>
The components shown in Table 1 were heated and stirred at about 75 ° C. for 0.5 hours and then cooled to about 30 ° C. with stirring. The melting point of the ethylene glycol distearate used is 58-64 ° C.

The average particle diameter, viscosity, and stability over time of the obtained dispersion were measured as follows.
(1) Measurement of average particle diameter The average particle diameter of the aqueous pearl luster component dispersion was measured with a laser diffraction particle size distribution analyzer (SALD-2000A, manufactured by Shimadzu Corporation) and evaluated according to the following evaluation criteria.
Evaluation criteria ○: Average particle diameter is 1 to 40 μm
X: Average particle diameter is less than 1 μm or more than 40 μm

(2) Viscosity measurement The viscosity of the aqueous pearl luster component dispersion was measured with a BM viscometer (manufactured by Tokimec Co., Ltd.) and evaluated according to the following evaluation criteria.
Evaluation criteria ○: Less than 5,000 mPa · s ×: Over 5,000 mPa · s

(3) Stability over time The stability over time was evaluated for 6 months by examining the change in the appearance of the aqueous pearl luster component dispersion at 0 ° C., room temperature (about 15 ° C. to about 30 ° C.) and 40 ° C., and evaluated according to the following evaluation criteria. did.
Evaluation criteria ○: Stable (separation is not recognized or significant increase in viscosity is not observed compared to the viscosity at the time of preparation)
Δ: Slightly stable (separation is not observed, but the viscosity increases slightly over time)
X: Unstable (occurrence of separation or significant increase in viscosity compared with viscosity during preparation)
The results are shown in Table 2.

  In Examples 1 to 3, an aqueous pearl luster component dispersion having an average particle size of 1 to 40 μm, an initial viscosity of 5,000 mPa · s or less and excellent stability over time could be prepared. However, in Comparative Example 1, since the amount of amide betaine was small, an aqueous pearl luster component dispersion having a large average particle size and a high initial viscosity was obtained. Further, as in Comparative Examples 2 and 3, when the amount of amide betaine or alkyl ether sulfate is large, the average particle size is small and an aqueous pearl luster component dispersion having poor temporal stability is obtained.

Example 4 and Comparative Examples 4-5
Using the components shown in Table 3, an aqueous pearl luster component dispersion was prepared in the same manner as in Examples 1 to 3 except that it was heated and stirred at 60 ° C. or higher, and the average particle size, viscosity, and stability over time were evaluated. . The results are shown in Table 4.
The melting point of the used polyethylene glycol distearate (3) (PEG-3 Distearate) is 45 to 50 ° C.

  In Example 4, an aqueous pearlescent component dispersion having an average particle size of 1 to 40 μm, an initial viscosity of 5,000 mPa · s or less and excellent stability over time could be prepared. However, as in Comparative Examples 4 and 5, when an appropriate amount of amide betaine was not blended, an aqueous pearl luster component dispersion having poor quality was obtained.

Example 5 and Comparative Examples 6-8
Manufacturing method of detergent composition imparted with pearl luster A detergent composition for hot process was prepared by the following procedure.
The ingredients of Phase I shown in Table 5 were mixed at 60 ° C., the ingredients of Phase II were added to Phase I, and the mixture was stirred while maintaining at 60 ° C. The phase III component was added thereto and stirred at 60 ° C. Then, it cooled, stirring to 30 degreeC, and added the component of the IV phase.
The appearance of the prepared composition was evaluated and the incompletely dissolved ethylene glycol distearate was confirmed as follows.

(1) Appearance The obtained detergent composition imparted with pearl gloss was put in a 200 mL transparent glass container, and the gloss was visually observed and evaluated according to the following evaluation criteria.
Evaluation criteria ○: Excellent pearl luster △: Nacreous but poor quality ×: No pearl luster

(2) Confirmation of Incompletely Dissolved Ethylene Glycol Distearate The obtained nacreous detergent composition was diluted with purified water, passed through a 100 μm standard sieve, and the solid matter remaining on the sieve was evaluated according to the following evaluation criteria. It was evaluated by.
Evaluation criteria ○: Almost no solid matter remains Δ: Some solid matter can be confirmed ×: Solid matter can be confirmed Table 6 shows the results.

  In Example 5, a detergent composition that imparts an excellent pearly luster with almost no incompletely dissolved ethylene glycol distearate was confirmed. However, the lump of ethylene glycol distearate that was not completely dissolved was confirmed in the cleaning composition containing the aqueous pearl luster component dispersion having a large average particle diameter as in Comparative Example 6. Moreover, the detergent composition which mix | blended the ethylene glycol distearate of the comparative example 8 did not show the outstanding pearl luster, and many lumps of the ethylene glycol distearate which did not melt | dissolve completely were confirmed.

Example 6 and Comparative Examples 9-10
A cold process cleaning composition was prepared in substantially the same procedure as in Example 5 except that the components shown in Table 7 were used. Evaluation of the appearance of the resulting composition and incompletely dissolved ethylene glycol distearate Was confirmed. The results are shown in Table 8.

In Example 6, it was possible to prepare a cleaning composition that imparts excellent pearly luster, in which incompletely dissolved ethylene glycol distearate can hardly be confirmed. However, the cleaning composition containing an aqueous pearl luster component dispersion that is not appropriate as in Comparative Examples 9 and 10 did not have excellent pearl luster.

Claims (8)

A) General formula (I):

Wherein R ₁ and R ₂ are each independently a C ₁₂ -C ₂₂ -alkyl group, A is —C ₂ H ₄ — or —C ₃ H ₆ —, and m is 1-10. Is the number of
35 to 65% by weight of a fatty acid glycol ester represented by
B)
B-1)
General formula (II):

Wherein R ₃ is a C ₈ -C ₂₂ -alkyl group, R ₄ and R ₅ are each independently a C ₁ -C ₃ -alkyl group, n is 2-4, y Is a number from 1 to 3.)
And B-2) general formula (III):

Wherein R ₆ is a C ₈ -C ₂₂ -alkyl group, x is a number from 1 to 5, and M is an alkali metal, alkaline earth metal, ammonium ion or C ₂ -C ₃ -hydroxyalkyl substituted. Indicates ammonium.)
1 to 15% by weight of at least one surfactant selected from the group consisting of alkyl ether sulfates represented by:
And C) an aqueous pearl luster component dispersion characterized in that it comprises up to 100% by weight of water.   The aqueous pearlescent component dispersion according to claim 1, comprising 40 to 60% by weight of component A) and 1 to 7% by weight of component B). In the general formula (I), R ₁ and R ₂ are each independently a C ₁₆ -C ₂₀ -alkyl group, A is an ethylene group, m is a number of 1 to 3, and the general formula ( In (II), R ₃ is a C ₁₀ -C ₂₀ -alkyl group, in general formula (III), R ₆ is a C ₁₀ -C ₂₀ -alkyl group, and x is a number from 1 to 3. 3. The aqueous pearl luster component dispersion according to 1 or 2.   The aqueous pearl luster component dispersion according to any one of claims 1 to 3, wherein the dispersed particles have an average particle diameter of 1 to 40 µm.   The aqueous pearl luster component dispersion according to any one of claims 1 to 3, wherein the dispersed particles have an average particle diameter of 10 to 35 µm.   The aqueous pearl luster component dispersion according to any one of claims 1 to 5, wherein the viscosity of the aqueous pearl luster component dispersion is 5000 mPa · s or less.   A method for producing an aqueous pearl luster product, comprising mixing the aqueous pearl luster component dispersion according to any one of claims 1 to 6 with a product that imparts pearl luster below the melting point of component A). The method according to claim 7, wherein the aqueous pearl luster product is an aqueous detergent.