JP2013067578A - Pearl gloss composition - Google Patents

Abstract

[PROBLEMS] To provide a pearly luster composition that has high pearl glossiness and whiteness (W value in the present application) immediately after production, has excellent storage stability at high temperatures, and has little change in whiteness.
(A) A fatty acid glycol ester composed of a fatty acid and a glycol, wherein the total amount of stearic acid and palmitic acid is 90% by mass or more of the fatty acid, and the content of glycol distearate is 45%. A pearl containing ~ 75 mass% fatty acid glycol ester, (B) fatty acid monoalkylolamide, (C) alkyl sulfate ester salt, and (E) water, and (C) component being 5-10 mass% Glossy composition.
[Selection figure] None

Description

  The present invention relates to a pearly luster composition. More specifically, the present invention relates to a pearly luster composition that can be suitably used to increase the added value of shampoos, rinses, body shampoos, liquid detergents and the like.

  Conventionally, bases that give a pearly luster have been used to increase the added value of shampoos, rinses, body shampoos, cosmetics, liquid detergents and the like. Accordingly, various pearly luster compositions containing a major component for imparting pearly luster have been studied.

  Various studies have been made on fatty acid glycol ester as a main component in the pearly luster composition, and a method of directly cooling and crystallizing in a product or a method of preparing a concentrated dispersion in advance and blending it into the product are used. In the method of preparing a concentrated dispersion in advance, when the blending amount of the fatty acid glycol ester is increased in order to obtain a sufficient pearly luster, the viscosity at room temperature increases and the fluidity decreases. Therefore, a pearly luster composition using a specific nonionic surfactant has been proposed (see Patent Document 1).

  Another object of the present invention is to provide a pearly luster composition having a high turbidity while maintaining a strong pearly luster, comprising a fatty acid glycol ester, an alkyl sulfate ester salt, a polyoxyalkylene type nonionic surfactant and water. A pearly luster composition comprising 0.3 to 3% by weight of a fatty acid (see Patent Document 2) has been proposed.

  Furthermore, with the object of providing a pearly luster composition having a high turbidity while maintaining a strong pearly luster, a pearly luster composition comprising a fatty acid glycol ester and water, further comprising an aliphatic alcohol, A pearly luster composition comprising 0.3 to 3% by weight of at least one aliphatic compound selected from the group consisting of fatty acid monoglycerides and aliphatic ethers has been proposed (see Patent Document 3).

  However, in these cases, there is a problem that a specific crystallization additive such as an aliphatic alcohol is required.

JP 2000-212031 A JP 2008-255110 A JP 2009-19194 A

  There is a need to provide a pearly luster composition having a high whiteness, a fine pearly luster texture, excellent storage stability at high temperatures, and having a sufficient pearly feeling even in a small amount. Furthermore, it is required to provide a pearly luster composition having such excellent properties without adding a crystallization additive.

  That is, the object of the present invention is to provide a pearly luster composition immediately after production, that is, an initial pearly luster and whiteness (W value in the present application) that are excellent in storage stability at high temperatures and with little change in whiteness. There is to do.

That is, the gist of the present invention is as follows.
[1] (A) A fatty acid glycol ester composed of a fatty acid and a glycol, wherein the total amount of stearic acid and palmitic acid is 90% by mass or more of the fatty acid, and the content of glycol distearate is 45 to 45%. A fatty acid glycol ester which is 75% by weight,
(B) fatty acid monoalkylolamide,
(C) alkyl sulfate salt, and (E) water,
A pearly luster composition containing 5 to 10% by weight of component (C);
[2] The pearly luster composition according to the above [1], wherein the melting end temperature obtained using a differential scanning calorimeter (DSC) of the component (A) is 70 to 76 ° C.
[3] The pearl according to [1] or [2], wherein the molar ratio of the component (B) to the component (C) (component (C) / component (B)) is 0.50 to 0.95. Gloss composition;
[4] The pearly luster composition according to any one of [1] to [3], wherein the component (A) is 10 to 50% by mass and the component (B) is 5 to 10% by mass;
[5] The pearly luster composition according to any one of [1] to [4], further comprising (D) a polyoxyalkylene type nonionic surfactant; and [6] component (D) The pearly luster composition according to the above [5], which is 0.5 to 10% by mass.

  The pearly luster composition of the present invention has a high whiteness, a fine pearly luster texture, can exhibit a sufficient pearly feeling even in a small amount, and is excellent in storage stability at high temperatures. It exhibits an excellent effect that there is little change in whiteness. Moreover, such an effect is sufficiently exerted even when no crystallization additive is blended.

It is the DSC curve obtained by measuring the (A) component in Example 5 with a differential scanning calorimeter.

  In the pearly luster composition of the present invention, the fatty acid glycol ester is a fatty acid glycol ester composed of a fatty acid and a glycol, and the total amount of stearic acid and palmitic acid is 90% by mass or more of the fatty acid. It has a great feature in that the content of the acid glycol is 45 to 75% by mass and the component (C) in the pearly luster composition is 5 to 10% by mass.

  One preferred embodiment of the present invention is a pearly luster composition having a melting end temperature of 70 to 76 ° C. obtained using a differential scanning calorimeter (DSC) of component (A). Although the detailed reason is unknown, a fatty acid glycol ester whose melting end temperature is 70 to 76 ° C. obtained using a differential scanning calorimeter (DSC) is used as component (A), and component (C) is pearl. By making the gloss composition 5 to 10% by mass, a large amount of fine pearl luster-forming particles containing a fatty acid glycol ester, which is a pearl luster-forming component, is precipitated, and a pearl luster composition having high whiteness can be easily obtained. A pearly luster composition having excellent storage stability at high temperatures can be obtained. This is presumably because the crystallinity of the fatty acid glycol ester is improved and it is easily precipitated.

  In this invention, W value shown by the below-mentioned Example can be used as a value which shows the whiteness of a pearl luster composition.

  The whiteness immediately after production of the pearly luster composition of the present invention, that is, the initial W value, is preferably 14 to 24, more preferably 14 to 23, and more preferably 15 to 23 from the viewpoint of imparting gloss to shampoos and the like. 16-22 are more preferable.

  Furthermore, the pearly luster composition of the present invention is excellent in storage stability at high temperatures. For example, the W value after storing the pearly luster composition of the present invention at 40 ° C. for 2 weeks is preferably 14 to 24, more preferably 14 to 23, and more preferably 15 to 23 from the viewpoint of imparting gloss to a shampoo or the like. Is more preferable, and 16 to 22 is still more preferable.

[Pearl gloss composition]
Examples of the fatty acid glycol ester of the component (A) used in the present invention include the formula (I):
Y—O— (CHR ¹ CH ₂ O) _p —COR ² (I)
(Wherein R ¹ represents a hydrogen atom or a methyl group, R ² represents a linear or branched saturated or unsaturated hydrocarbon group having 13 to 21 carbon atoms, and Y represents a hydrogen atom or —COR ² ( R ² represents the same as described above, and p is a number of 1 to 3, which means an average number of added moles).

As described above, R ² is a linear or branched saturated or unsaturated hydrocarbon group having 13 to 21 carbon atoms, preferably 15 to 19 carbon atoms. Therefore, in view of the fact that the fatty acid glycol ester is composed of a fatty acid and a glycol, the fatty acid is a linear or branched saturated or unsaturated fatty acid having 14 to 22 carbon atoms, preferably 16 to 20 carbon atoms. Is applicable.

  The total amount of stearic acid and palmitic acid is a fatty acid glycol ester from the viewpoint that the initial pearl glossiness and initial whiteness of the pearly luster composition are increased, and that the storage stability at high temperature is excellent and the change in whiteness is reduced. The remaining fatty acids are preferably fatty acids having 14, 15, 17, 19 to 22 carbon atoms.

  As the fatty acid constituting the fatty acid glycol ester, preferably both stearic acid and palmitic acid are essential, and the total amount of stearic acid and palmitic acid is preferably 95% by mass or more of the total fatty acid, 97 What is more than mass% is more preferable, what is 99 mass% or more is more preferable, and what is 100 mass% is still more preferable.

  In the present invention, the fatty acid constituting the fatty acid glycol ester is a fatty acid that can be a raw material of the fatty acid glycol ester. For example, the fatty acid is obtained by transesterification of a fatty acid ester of a lower alcohol having 1 to 3 carbon atoms with a glycol. Even when a glycol ester is produced, it is converted as a fatty acid.

  For example, the reaction of a mixture of palmitic acid and stearic acid with ethylene glycol gives a mixture of ethylene glycol dipalmitate, ethylene glycol monopalmitate, monostearate monostearate, and ethylene glycol distearate.

  From the viewpoint of high initial pearl gloss and whiteness, and excellent storage stability at high temperatures and little change in whiteness, the content of stearic acid in the total fatty acid constituting the fatty acid glycol ester is preferably 63 to 84. It is mass%, More preferably, it is 67-84 mass%, More preferably, it is 70-84 mass%.

  From the above viewpoint, the mass ratio of stearic acid and palmitic acid (stearic acid / palmitic acid) in all fatty acids constituting the fatty acid glycol ester is preferably 63/37 to 84/16, more preferably 65/35. 83/17, more preferably 67/33 to 82/18.

  p is from 1 to 3 and preferably 1 from the viewpoint of high initial pearl gloss and gloss value of the pearly luster composition, excellent storage stability at high temperature and little change in whiteness.

Moreover, as represented by the formula (I), the fatty acid glycol ester may be either a monocarboxylic acid ester when Y is a hydrogen atom or a dicarboxylic acid ester when Y is —COR ^2. However, from the viewpoints of high initial pearl gloss and whiteness, excellent storage stability at high temperatures, and little change in whiteness, a dicarboxylic acid ester when Y is —COR ² is preferred. In the dicarboxylic acid ester, R ² may be the same or different.

  As the component (A), it is preferable that two or more fatty acid glycol esters are used in combination from the viewpoint of adjusting crystallinity. When two or more fatty acid glycol esters are used in combination, they may be a mixture of each prepared fatty acid glycol ester, and a fatty acid glycol obtained by reacting a mixture of fatty acids having different alkyl chain lengths and glycol. It may be a mixture of esters.

  Examples of the glycol constituting the fatty acid glycol ester include those corresponding to the above formula (I), that is, ethylene glycol, 1,2-propylene glycol, and diethylene glycol. Among these, ethylene glycol is preferable from the viewpoint of controlling crystallinity.

  Among the fatty acid glycol esters, the content of glycol distearate is preferably 45% by mass or more from the viewpoint of improving the storage stability under high temperature conditions of the pearly luster composition, and 75% by mass or less from the viewpoint of initial whiteness. preferable. From these viewpoints, it is preferably 45 to 75% by mass, more preferably 47 to 72% by mass, further preferably 50 to 72% by mass, and more preferably 50 to 70% by mass. If it exceeds 75% by mass, the crystallinity is changed and the whiteness is considered to decrease.

  The melting end temperature of the component (A) is preferably 70 ° C. or higher from the viewpoint of improving the storage stability of the pearly luster composition under high temperature conditions, and preferably 76 ° C. or lower from the viewpoint of initial whiteness. From these viewpoints, 70 to 76 ° C is preferable, 71 to 76 ° C is preferable, 72 to 76 ° C is more preferable, and 72 to 75 ° C is still more preferable. In this specification, the melting end temperature of the component (A) is obtained using a differential scanning calorimeter (DSC). Specific measurement conditions are as described in the examples of this specification.

  It is preferable that the melting end temperature of the component (A) is 70 to 76 ° C. and that the content of glycol distearate is constant from the viewpoint of forming a crystal with high whiteness and excellent high-temperature storage stability.

  The content of the fatty acid glycol ester in the pearly luster composition is preferably 10% by mass or more, more preferably 15% by mass or more, further preferably 18% by mass or more from the viewpoint of imparting pearly luster, while 50% from the viewpoint of fluidity. % By mass or less is preferable, 30% by mass or less is more preferable, and 25% by mass or less is more preferable. From these viewpoints, the content of the fatty acid glycol ester is preferably 10 to 50% by mass, more preferably 15 to 30% by mass, further preferably 15 to 25% by mass, and 18 to 25% by mass in the pearly luster composition. Is even more preferable.

The fatty acid monoalkylolamide as the component (B) used in the present invention is effective in improving the pearly luster. For example, the formula (II):
^{R 3 CO-NH-R 4} OH (II)
(Wherein, R ³ represents a linear or branched saturated or unsaturated hydrocarbon group having 7 to 20 carbon atoms, and R ⁴ represents an ethylene group or a propylene group).

In the formula (II), R ³ is preferably an alkyl group or an alkenyl group having 7 to 20 carbon atoms, preferably 9 to 17 carbon atoms, and specifically includes an undecyl group, a tridecyl group, a heptadecyl group, and the like. . Examples of R ⁴ include an ethylene group, an n-propylene group, and an isopropylene group.

  Examples of fatty acid monoalkylolamides include lauric acid monoethanolamide, lauric acid monopropanolamide, lauric acid monoisopropanolamide, myristic acid monoethanolamide, palmitic acid monoethanolamide, stearic acid monoethanolamide, oleic acid monoethanolamide, Oleic acid monoisopropanolamide, coconut oil fatty acid monoethanolamide, coconut oil fatty acid monopropanolamide, coconut oil fatty acid monoisopropanolamide, coconut plant oil fatty acid monoethanolamide, etc. may be mentioned alone or in combination of two or more. Can be used. Of these, coconut oil fatty acid monoethanolamide, lauric acid monoethanolamide, palmitic acid monoethanolamide, and stearic acid monoethanolamide are preferred.

  The content of the fatty acid monoalkylolamide in the pearly luster composition is preferably 5% by mass or more, more preferably 6% by mass or more, and even more preferably 7% by mass or more from the viewpoint of crystal refining, while the pearly luster composition 10 mass% or less is preferable from a viewpoint of suppressing the raise of the viscosity of a thing and improving fluidity | liquidity. From these viewpoints, the content of the fatty acid monoalkylolamide is preferably 5 to 10% by mass, more preferably 6 to 10% by mass, and further preferably 7 to 10% by mass in the pearly luster composition.

The alkyl sulfate ester salt of the component (C) used in the present invention is effective for uniformly mixing each component. For example, the formula (III):
R ⁵ —O— (R ⁶ O) _r —SO ₃ M (III)
(In the formula, R ⁵ represents a linear or branched saturated or unsaturated hydrocarbon group having 8 to 20 carbon atoms, preferably 10 to 14 carbon atoms, R ⁶ represents an ethylene group or a propylene group, ethylene Group is preferred, M represents an alkali metal, an alkaline earth metal, an ammonium ion or a hydroxyalkyl-substituted ammonium having 2 or 3 carbon atoms, and r is a number of 0 to 8 and means an average number of added moles). And an alkyl sulfate ester salt which may have a polyoxyalkylene group. r is preferably 0 to 4, and more preferably 1 to 3.

In formula (III), R ⁵ is preferably an alkyl group or alkenyl group having 8 to 20 carbon atoms, and specific examples include lauryl group, myristyl group, palmityl group, stearyl group and the like. Examples of R ⁶ include an ethylene group, an n-propylene group, and an isopropylene group.

  Preferable examples of the alkyl sulfate ester salt include sodium lauryl sulfate, triethanolamine lauryl sulfate, sodium polyoxyethylene lauryl ether sulfate (average added mole number of ethylene oxide (EO): 1 to 4), ammonium polyoxyethylene lauryl ether sulfate (Average number of added moles of EO: 1 to 4) and polyoxyethylene lauryl ether sulfate triethanolamine (average number of added moles of EO: 1 to 4). It may be.

  The content of the alkyl sulfate ester salt in the pearly luster composition is preferably 5% by mass or more, more preferably 6% by mass or more, still more preferably 7% by mass or more, from the viewpoint of uniformly mixing the components. From the viewpoint of improving whiteness by miniaturization, 10% by mass or less is preferable, and 9% by mass or less is more preferable. From these viewpoints, the content of the alkyl sulfate salt is preferably 5 to 10% by mass, more preferably 6 to 9% by mass, and still more preferably 7 to 9% by mass. When the alkyl sulfate ester salt exceeds 10% by mass, the whiteness, particularly the initial pearly luster, decreases, which is presumed to be due to the coarsening of the crystals.

  The total amount of the component (B) and the component (C) in the pearly luster composition of the present invention is preferably 10% by mass or more from the viewpoint of uniformly mixing each component, improving whiteness and fluidity of the composition. In view of the above, 20% by mass or less is preferable. From these viewpoints, the total amount of the component (B) and the component (C) in the pearly luster composition is preferably 10 to 20% by mass, more preferably 12 to 20% by mass, and further 14 to 20% by mass. preferable.

  In the pearly luster composition of the present invention, from the viewpoint of increasing the initial pearly luster and whiteness of the pearly luster composition, the molar ratio of the (B) component and the (C) component ((C) component / (B) component) ) Is preferably 0.50 to 0.95, more preferably 0.50 to 0.90, still more preferably 0.55 to 0.90, still more preferably 0.60 to 0.84, and 0.65 to 0.79 is even more preferable.

  In the present invention, it is preferable to use a polyoxyalkylene type nonionic surfactant as component (D). The component (D) is effective in reducing the viscosity of the pearly luster composition, and examples thereof include those having a polyoxyalkylene group such as a polyoxyethylene group or a polyoxypropylene group. Specific examples of the polyoxyalkylene type nonionic surfactant include polyoxyalkylene alkyl ether, polyoxyalkylene alkyl phenyl ether, polyoxyalkylene sorbitan fatty acid ester, polyoxyalkylene fatty acid monoalkanolamide, polyoxyalkylene fatty acid dialkanolamide, etc. And two or more of them may be used in combination.

Of these, formula (IV):
^{R 7 -O- (R 8 O)} q -H (IV)
(In the formula, R ⁷ represents a linear or branched saturated or unsaturated hydrocarbon group having ^{8 to} 20 carbon atoms, preferably 10 to 14 carbon atoms, R ⁸ represents an ethylene group or a propylene group, and q is preferably Is a number of 1 to 12 and means an average number of added moles).

In the formula (IV), R ⁷ is preferably an alkyl group having 8 to 20 carbon atoms or an alkenyl group having 8 to 20 carbon atoms. Moreover, as R < ⁸ >, an ethylene group, n-propylene group, and an isopropylene group are mentioned. q is more preferably 1-6, and still more preferably 3-6.

From the viewpoint of suppressing emulsification of the pearly luster composition and controlling the viscosity, the HLB of the polyoxyalkylene type nonionic surfactant is preferably less than 18, more preferably 9-15, and even more preferably 9-12. HLB is an index indicating a hydrophilic-lipophilic balance. In the present invention, the formula by Oda and Teramura et al.
HLB = (Σinorganic value / Σorganic value) × 10
It is a value when calculated using.

  The content of the polyoxyalkylene type nonionic surfactant in the pearly luster composition is preferably 0.5% by mass or more, more preferably 1% by mass or more, from the viewpoint of reducing the viscosity of the pearly luster composition. From the viewpoint of obtaining good pearly luster, it is preferably 10% by mass or less, more preferably 8% by mass or less, and further preferably 6% by mass or less. From these viewpoints, the content of the polyoxyalkylene type nonionic surfactant in the pearly luster composition is preferably 0.5 to 10% by mass, more preferably 0.5 to 8% by mass, and 1 to 6% by mass. Is more preferable, and 2 to 6% by mass is more preferable.

  The pearly luster composition of the present invention contains water as the component (E), and the water content in the pearly luster composition is preferably 25 to 70% by mass from the viewpoint of concentration and viscosity adjustment of the pearly luster composition. 40-70 mass% is more preferable, and 50-65 mass% is further more preferable.

  The pearly luster composition may further contain a pH adjuster, preservative, salts, alcohols, polyols and the like as appropriate.

[Method for producing pearly luster composition]
The method for producing a pearly luster composition of the present invention is a method for crystallizing pearly luster-forming particles containing a fatty acid glycol ester from a molten mixture of raw materials containing the components (A) to (C) and (E). If there is no particular limitation. Specific methods include, for example, a method of heating a mixture of raw materials containing the components (A) to (C) and (E) and then cooling; (E) and (B) components to (C) Examples of the method include a method of cooling after mixing a mixture containing a component surfactant and the component (A) in a molten state. In addition, in this invention, you may add (D) component to the molten mixture liquid of a raw material as needed.

  In the manufacturing method of this invention, it mix | blends so that (C) component may be 5-10 mass%. About another component, the quantity as described in description of said pearl luster composition is employable.

  The temperature of the raw material melt is preferably equal to or higher than the melting end temperature of component (A), and is preferably equal to or lower than the boiling point of component (A). Moreover, the temperature 1-20 degreeC higher than the completion | finish melting temperature of (A) component is more preferable, and the temperature 1-10 degreeC higher is more preferable.

  From the viewpoint of obtaining pearly luster-forming particles having a uniform shape, the cooling is preferably gentle cooling with a more uniform temperature distribution. From this viewpoint, the cooling rate is preferably 0.1 to 5 ° C / min, more preferably 0.1 to 3 ° C / min, and further preferably 0.1 to 2 ° C / min.

  After the pearly luster-forming particles are crystallized, it is preferable to cool them further to stabilize the crystals, and it is desirable to cool them until the liquid temperature becomes 10 to 45 ° C, preferably 15 to 40 ° C.

  It is preferable to carry out the melting and cooling of the raw material with stirring so that the solution does not separate.

  The cooling is preferably a method in which the temperature distribution is more uniform. As a specific method, for example, a method of preparing a molten mixed solution in a blending tank attached with a jacket and passing coolant water through the jacket can be cited.

The size of the formulation tank is not particularly limited, it may be used blending tanks 20 m ^3, for example, from 0.3 L. When mass-producing on an industrial scale, it is preferable to use a mixing tank of 100 L to 20 m ³ . When such an industrial scale mixing tank is used, it is usually difficult to control the cooling rate within a desired range throughout the entire cooling process, and a large load is imposed on the accompanying cooling equipment. In the present invention, it is not necessary to constantly control the cooling rate, and it is possible to easily obtain a pearly luster composition having a high degree of whiteness, regardless of the scale or type of production equipment, by simply adjusting the composition of the raw material to a specific range. it can.

  The obtained pearly luster composition can be mixed with an appropriate detergent component such as a surfactant to form a detergent.

  In the detergent, the pearly luster composition (pure component) of the present invention is preferably 0.5 to 5% by mass, more preferably 1 to 3% by mass.

  In the following, aspects of the invention will be further described and disclosed by means of examples. These examples are merely illustrative of the invention and are not meant to be limiting in any way.

  Various properties of the pearly luster composition obtained in each example and each comparative example were measured by the following methods.

<Pearl luster of pearl luster composition>
The pearly luster composition was diluted 20 times (mass ratio) with water, the appearance of the pearly luster was observed with the naked eye, and evaluated according to the following criteria. In addition, the thing in which the bubble was mixed was centrifuged and defoamed.

[Evaluation criteria for pearl luster]
A: Fine and silky gloss is recognized.
B: A slightly rough gloss is recognized.
C: There is no gloss.
D: Separation is observed.

<Whiteness of pearly luster composition>
An aqueous solution containing 19.5% by mass of polyoxyethylene (2) sodium lauryl ether sulfate (trade name: EMAL E-27C, concentration 27%, manufactured by Kao) 33.3 times (mass ratio) 3 g of the pearly luster composition A diluted detergent (100 g) was prepared. Measure 1 g of the cleaning agent in a round cell (Nippon Denshoku, 35Φ × 15H, part No. 2301) mounted in a black folder, and use L (lightness) with a color difference meter (KONICA MINOLTA, CR-400). , B (hue / saturation) were measured under light-shielded conditions such as in a dark room. Next, the W value was determined by the following equation defined by ASTM (American Society for Testing and Materials) (E-313).
W value = (7L ² -40Lb) / 700

  The W value was used as an index representing the whiteness of the pearly luster composition, in other words, turbidity. The higher the W value, the whiter and darker the pearly luster composition will be.

  The pearl luster and W value immediately after production of the pearl luster composition (that is, initial pearl luster and initial W value) were evaluated in the same manner as described above. Further, the pearly luster and W value when this pearly luster composition was stored at 40 ° C. for 2 weeks were evaluated, and the appearance change immediately after production was visually evaluated according to the following criteria.

[Evaluation criteria for changes in pearl luster]
A: No change is felt B: Slightly degraded C: Obviously degraded or abnormalities such as separation are observed

<The melting end temperature of component (A)>
When using a mixture of fatty acid glycol esters prepared as component (A), the mixture of fatty acid glycol esters (10 g) mixed at a predetermined ratio is melted at 80 ° C. in a sealed glass bottle (50 g). If not, the temperature was raised to the melting temperature) and melted. Alternatively, when one type of fatty acid glycol ester is used as the component (A), the fatty acid glycol ester (10 g) is sealed in a glass bottle (50 g) container up to 80 ° C. (temperature that melts if not melted at 80 ° C.). The temperature was raised and melted.

  This container was immersed in water and rapidly cooled to 20 ° C. (30 ° C./min) to solidify. Using a differential scanning calorimeter (Thermo plus DSC8230, manufactured by Rigaku), the component (A) solidified by storage at 20 ° C. for 5 minutes is heated at 5 ° C./min, and the temperature at which the endotherm ends is the melting end temperature. It was. An example of Example 5 is shown in FIG.

Examples 1-8 and Comparative Examples 1-6
The components (A) to (E) and other components (component (F)) shown in Tables 1 and 2 were mixed at 80 ° C. in a jacketed separable flask. Then, it cooled to 20 degreeC with the cooling rate of 0.2 degreeC / min, and stirring rotation speed 100r / min, and obtained the pearl luster composition. In addition, the numerical value in a table | surface shows the pure part of each component.

Note) The composition value in the table indicates mass%. The numbers in parentheses indicate the number of moles of ethylene oxide added.
1) Difatty acid ethylene glycol (trade name: Emanon 3201MH-V, manufactured by Kao), ethylene glycol dipalmitate: ethylene glycol palmitate stearate: ethylene glycol distearate = 0.25: 0.50: 0.25 (mass) 2) Difatty acid ethylene glycol (trade name: Pegnol EDS98-K), ethylene glycol dipalmitate: ethylene glycol monopalmitate: ethylene glycol monostearate: ethylene glycol distearate = 0: 0: 1 ( (Mass ratio)
3) Difatty acid ethylene glycol, ethylene glycol dipalmitate: ethylene glycol palmitate stearate: ethylene glycol distearate = 0.05: 0.30: 0.65 (mass ratio) 4) Difatty acid ethylene glycol, di Mixture of ethylene glycol palmitate: ethylene glycol palmitate stearate: ethylene glycol distearate = 0.09: 0.41: 0.49 (mass ratio) 5) Coconut oil fatty acid monoethanolamide (trade name, manufactured by Kawaken Fine Chemicals) : Amidol CME): Average molecular weight 267.1 (however, this average molecular weight is a value calculated by setting the average carbon number of the raw material palm oil fatty acid to 12.8.)
6) Sodium polyoxyethylene (2) lauryl ether sulfate (manufactured by Kao, trade name: EMAL E-27C, concentration 27%): molecular weight 376.6 (however, the composition value in the table is polyoxyethylene (2) lauryl ether) Effective portion of sodium sulfate)
7) Polyoxyethylene (4) lauryl ether [HLB: 9.7] (trade name: Emulgen 504k, manufactured by Kao Corporation)
However, the numerical value in () shows an average added mole number.

  From the above results, it can be seen that the pearly luster compositions of Examples 1 to 8 have fine and silky pearly luster, a high W value, and the pearly luster and W value do not change even after storage at 40 ° C. for 2 weeks. . Furthermore, it turned out that the pearly luster composition of Examples 1-8 exhibits such an excellent effect, even if it does not contain crystallization additives, such as aliphatic alcohol.

  On the other hand, in the examples (Comparative Examples 1 and 2) in which the amount of the component (C) exceeded 10% by mass, the initial gloss and the W value tended to be inferior. In the examples in which the content of glycol distearate was less than 45% (Comparative Examples 3 to 5), it was found that changes in gloss and W value after storage at 40 ° C. for 2 weeks were large. Furthermore, even in the case where the content of glycol distearate exceeded 75% by mass (Comparative Example 6), the initial gloss and W value tended to be inferior.

The pearly luster composition of the present invention is suitably used for liquid detergents such as shampoos, rinses and body shampoos.

Claims (6)

(A) A fatty acid glycol ester composed of a fatty acid and a glycol, wherein the total amount of stearic acid and palmitic acid is 90% by mass or more of the fatty acid, and the content of glycol distearate is 45 to 75% by mass. Fatty acid glycol ester, which is
(B) fatty acid monoalkylolamide,
(C) alkyl sulfate salt, and (E) water,
A pearly luster composition containing (C) 5 to 10% by mass.   The pearly luster composition according to claim 1, wherein the melting end temperature obtained by using a differential scanning calorimeter (DSC) of the component (A) is 70 to 76 ° C.   The pearly luster composition according to claim 1 or 2, wherein the molar ratio of the component (B) to the component (C) (component (C) / component (B)) is 0.50 to 0.95.   The pearly luster composition according to any one of claims 1 to 3, wherein the component (A) is 10 to 50% by mass and the component (B) is 5 to 10% by mass.   The pearly luster composition according to any one of claims 1 to 4, further comprising (D) a polyoxyalkylene type nonionic surfactant. The pearly luster composition according to claim 5, wherein the component (D) is 0.5 to 10% by mass.

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