JPH0443043B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention uses a pearl agent dispersion, more specifically, a cationic surfactant, a glycerin monofatty acid ester, and an α-mono(methyl branched alkyl) glyceryl ether to produce pearl-like crystals.
This invention relates to a pearling agent dispersion having a uniform crystal shape and excellent high and low temperature stability. BACKGROUND ART Conventionally, shampoos, conditioners, lotions, etc. have been made to have a pearl-like appearance in order to beautify their appearance and increase their added value. Conventional methods for preparing such a pearl agent dispersion include, for example, a method of blending crushed natural or inorganic materials such as mica, fish scales, bismuth oxychloride, or higher fatty acids or their salts, ethylene glycol higher fatty acid esters, etc. A method was used to crystallize such crystals. Among these, the method that has been commonly used in recent years is the method of using ethylene glycol higher fatty acid ester, which is a method in which the ester, which is solid at room temperature, is added during the production of shampoo, etc., heated and melted, and then cooled. This is a method of forming crystals of the ester to give it a pearl-like appearance. As a so-called pearling agent that crystallizes pearl-like crystals, for example, ethylene glycol dihigher fatty acid ester (Japanese Patent Application Laid-Open No. 57-1989)
No. 51799, No. 57-156409, No. 57-156410, No. 57-156409, No. 57-156410, No.
57-165308), polyethylene dicarboxylic acid esters (JP 57-67510), ethylene glycol or triethylene glycol fatty acid diesters (JP 56-133400), and polyalkylene glycol difatty acid esters (JP 57-133400). −48335)
etc. have been reported. Under these circumstances, the present inventor conducted intensive research on a pearl agent that is cheaper than conventional pearl agents, has a uniform particle size, and can stably produce a pearl agent with a beautiful appearance in an activator. As a result, it was discovered that a mixture of a cationic surfactant, glycerin monofatty acid ester, and α-mono(methyl branched alkyl) glyceryl ether in a specific ratio achieved the above object, and the present invention was completed. That is, the present invention contains (A) a cationic surfactant, (B) glycerin monofatty acid ester, and (C) α-mono(methyl branched alkyl) glyceryl ether as essential components, and the total amount of these three components is 1 to 50% by weight, and the mixing ratio of (A), (B) and (C) is
In the triangular diagram of the three-component system, the following three points are a [(A)=40.0, (B)=59.5, (C)=0.5] b [(A)=0.5, (B)=59.5, (C)= 40.0] e [(A) = 0.5, (B) = 99.0, (C) = 0.5] The present invention provides a pearlescent agent dispensing liquid characterized by being within a range surrounded by a straight line connecting (A)=0.5, (B)=99.0, (C)=0.5]. The cationic surfactant that is the component (A) of the present invention is not particularly limited, and any surfactant that can be incorporated into a hair rinse agent may be used, but the following formula (), (In the formula, 1 to 2 of R ₁ , R ₂ , R ₃ and R ₄ represent a long chain alkyl group or a long chain hydroxyalkyl group having 8 to 20 carbon atoms, and the rest are alkyl groups having 1 to 3 carbon atoms. , represents a hydroxyalkyl group, a benzyl group, or a polyoxyethylene group having a total number of added moles of 10 or less, and X represents a halogen atom or an alkyl sulfate group having 1 to 2 carbon atoms).
In particular, distearyldimethylammonium chloride, stearyltrimethylammonium methosulfate, stearyltrimethylammonium chloride, stearyldimethylbenzylammonium chloride, lauryldiethylbenzylammonium chloride, lauryltrimethylammonium bromide, distearylmethylhydroxymethyl chloride, cetyltrimethylammonium chloride, N -stearyl-N,N,N-
Preferred are tri(polyoxyethylene)ammonium chloride (3 moles added in total), cetyltriethylammonium bromide, stearyldimethylammonium chloride, and the like. One or more of these components (A) are blended in the pearlescent agent dispersion in an amount of 0.05 to 20% by weight (hereinafter simply expressed as %), preferably 0.5 to 10%. If the amount of component (A) is less than 0.05%, phase separation will occur, and if it exceeds 20%, the pearly luster will be lost, which is not preferable. The glycerin monofatty acid ester of component (B) has the following general formula (), (In the formula, R ₅ represents a straight chain or branched chain saturated or unsaturated hydrocarbon group having 11 to 23 carbon atoms.) It is preferable to use a glycerin monofatty acid ester as a main component. Preferred specific examples include oleic acid monoglyceride, palmitic acid monoglyceride, isostearic acid monoglyceride, stearic acid monoglyceride,
Examples include those whose main component is behenic acid monoglyceride. Generally, commercially available monoglycerides contain large amounts of diesters, triesters, unreacted glycerin, and fatty acids in addition to monoesters, and are not suitable for the purpose of the present invention. In order to provide excellent pearly luster, it is necessary to contain 80% by weight or more of the above-mentioned glycerin monofatty acid ester. These (B) components need to be solubilized in the dispersion medium at a temperature higher than their melting point and become a uniform liquid, and in order to precipitate crystals with excellent pearl-like luster, they must be added to the pearling agent dispersion. It is blended in an amount of 0.595 to 49.5%, preferably 2 to 20%. In addition, the α-mono(methyl branched alkyl)glyceryl ether of component (C) has the following general formula (), R ₆ −OCH ₂ CH(OH)CH ₂ OH () (wherein, R ₆ has 6 to 6 carbon atoms). 24 (representing a methyl-branched saturated hydrocarbon group) is preferred. This is produced, for example, by the method described in JP-A-56-39033. As a preferable example, R ₆ in the formula ()
is the next group (), (In the formula, m is an integer from 2 to 14, m is 3 to 11
, and the sum of m and n is 9 to 21). Among these, more preferable ones are those in which the sum of m and n in formula ( ) is 11 to 21
17 (i.e. the total number of carbon atoms in the alkyl group is 14 to 20)
Among them, the sum of m and n is 15 (ie, the total number of carbon atoms in the alkyl group is 18). Further, the branched methyl group is preferably one near the center of the alkyl main chain. Next, the physical properties of representative compounds of α-mono(methyl branched alkyl)glyceryl ether are shown.

[Table] These (C) components are contained in the pearl agent dispersion at a concentration of 0.05~
40%, preferably 0.1 to 20%. The pearl agent dispersion of the present invention includes the above (A), (B) and (C).
Contains these three ingredients as essential ingredients, but in addition, these three
The total amount of ingredients is 1 to 50%, preferably 5 to 30%,
The mixing ratio of (A), (B) and (C) is within the range surrounded by the straight line connecting the three points (a, b, c) in the triangular diagram of the ternary component system (Figure 1). It is necessary. The pearl agent dispersion of the present invention is produced by heating a solution containing (A), (B), and (C) to form a homogeneous solution, and then forcing or naturally cooling the solution to crystallize the crystals. be done. In the present invention, known nucleating agents and hydrotropic agents can be blended to promote pearlization. Nucleating agents include water-soluble inorganic salts such as sodium chloride, ammonium chloride, sodium sulfate, sodium citrate, sodium succinate, sodium oxalate, citric acid, succinic acid, oxalic acid, urea, etc. One or more types are added in an amount of 0.1 to 5%.
In addition, hydrotropic agents include ethyl alcohol, isopropyl alcohol, glycerin,
Examples include propylene glycol, 1,3-butylene glycol, sorbitol, polyethylene glycol, etc., and these include one or more of them at 1 to 50%
% added. Furthermore, in order to stably maintain the produced pearl-like crystals, a water-soluble polymer compound such as a cellulose derivative, polyvinylpyrrolidone, or methoxyethylene-maleic anhydride copolymer may be blended. Particularly preferred water-soluble polymer compounds are those represented by the following general formula. [R ₇ is a hydrogen atom, group (-CH ₂ CH ₂ O) - _n H (m is 1
-5 integer), group -CH ₂ , group -C ₂ H ₅ , group -
Indicates one or more types of C ₃ H ₆ OH, m is 5 to
5000] One or more of these water-soluble polymer compounds are added in an amount of 0.1 to 5% by weight. In the method for producing the pearl agent dispersion of the present invention, the stirring speed is not particularly limited, and is
A low rotation speed of about 100 rpm is sufficient. At this time, it is preferable that the above-mentioned nucleating agent and stabilizer be dissolved in the dispersion medium in advance. In addition, in order to quickly cause pearlization, it is preferable to lower the liquid temperature to 0 to 20°C. The cooling method is not particularly limited and may be either slow cooling or rapid cooling. In this way, the entire liquid will have a beautiful pearl-like luster as it cools. If necessary, a PH regulator, preservative, pigment, fragrance, ultraviolet absorber, etc. can be added to this composition. It is preferable to adjust the pH to a range of 4 to 11, particularly 7 to 10. The thus obtained pearl agent dispersion of the present invention is
A necessary amount is blended into liquid compositions such as liquid cleaning compositions, liquid rinses, and paste compositions depending on the intended use, and it is possible to impart beautiful pearl-like luster to these compositions. In this case, the amount of the pearl agent dispersion added to the above composition is, for example, 1 to 20%, preferably 2 to 10% in the liquid composition.
It is. The pearling agent dispersion obtained as described above has a fine crystal grain size of about 1 to 10 μm, so it is different from the conventional molten pearl agent having particles with a particle size of about 30 μm or more. It has a more uniform and beautiful appearance than a dispersion. Next, the present invention will be explained with reference to Examples, but the present invention is not limited to these Examples. The test method used in this example is as follows. (1) Appearance A sample was placed in a 100ml transparent glass container, and the appearance of pearlescent luster was observed with the naked eye. If the sample contained air bubbles, it was centrifuged to remove air bubbles. 〇 = Pearl luster is uniform. × = cloudy, emulsion-like, or non-uniform pearl luster. (2) High temperature stability Place the sample in a transparent glass container, seal it, and store at 50℃.
After being stored in a constant temperature bath for one month, the presence or absence of separation of the sample and the presence or absence of aggregation of the pearlescent agent were visually observed. 〇=No abnormalities such as separation, aggregation of pearlescent agent, loss of pearlescent luster, etc. are observed. ×= Any abnormality such as separation, aggregation of pearlescent agent, or loss of pearlescent luster is observed. (3) Low-temperature stability Place the sample in a transparent glass container, seal it, and keep it at -15
After being stored in a constant temperature bath at ℃ for one month, the samples were visually observed for separation and solidification. 〇 = Fluid without separation or caking. × = Abnormalities such as separation and caking. Example 1 Distearyldimethylammonium chloride 1 (%) Behenic acid monoglyceride (monoester content 90%) 8 α-Mono(isostearyl)glyceryl ether [In the formula (), m = 7, n = 8]
1 Add the mixture of water heated to 90 80℃, heated to the same temperature and dissolved, and stir to 20℃.
Cool until cool. The composition exhibits a pearl-like appearance;
The storage stability was also good. Example 2 Monobehenyltrimethylammonium chloride 0.4 (%) Monocetyltrimethylammonium chloride 0.6 Stearic acid monoglyceride (monoester content 90%) 8.5 α-mono(isostearyl)glyceryl ether [(in the formula, m = 7, n =8 things]
0.5 Water 90 Add ~ heated to 80°C and dissolved at the same temperature, and cool to 20°C while stirring. This composition exhibited a pearl-like appearance and had good storage stability. Example 3 A pearling agent dispersion was prepared by blending the components shown in Table 1 in various proportions and using the method shown in Example 1. Table 1 shows the results of evaluating the obtained dispersion.

[Table] As is clear from the results, the three components (A), (B), and (C) can provide a fully satisfactory pearling agent dispersion.
The mixture ratio is only within the range surrounded by the straight line connecting the three points a, b, and c in Figure 1. Example 4 A pearling agent dispersion having the composition shown in Table 2 was prepared,
The obtained dispersion liquid was evaluated. The preparation method and evaluation method of the composition are the same as in Example 1.

【table】

【table】 [Brief explanation of drawings]

Figure 1 shows (A), (B) and
(C) It is a triangular diagram showing the blending ratio of the component. A...Cationic surfactant, B...Glycerin monofatty acid ester, C...α-mono(methyl branched alkyl) glyceryl ether.

Claims (1)

[Claims] 1. As an essential component, (A) a cationic surfactant;
(B) contains glycerin monofatty acid ester and (C) α-mono(methyl branched alkyl) glyceryl ether, the total amount of these three components is 1 to 50% by weight, and (A), (B) and (C) The mixing ratio of is the following three points in the triangular diagram of the three-component system: a [(A)=40.0, (B)=59.5, (C)=0.5] b [(A)=0.5, (B)=59.5 , (C) = 40.0] e [(A) = 0.5, (B) = 99.0, (C) = 0.5]. 2 The cationic surfactant has the following general formula (), (In the formula, 1 to 2 of R ₁ , R ₂ , R ₃ and R ₄ represent a long-chain alkyl group or a long-chain hydroxyalkyl group with 8 to 20 carbon atoms, and the rest are alkyl groups with 1 to 3 carbon atoms. , a hydroxyalkyl group, a benzyl group, or a polyoxyethylene group having a total number of added moles of 10 or less, and X represents a halogen atom or an alkyl sulfate group having 1 to 2 carbon atoms. Pearl agent dispersion according to item 1. 3 Glycerin monofatty acid ester has the following general formula (), (In the formula, R ₅ represents a straight chain or branched chain saturated or unsaturated hydrocarbon group having 11 to 23 carbon atoms.) Pearl agent dispersion according to item 1. 4. The pearl agent dispersion according to claim 3, wherein the glycerin monofatty acid ester contains 80% by weight or more of one represented by the general formula (). 5 α-Mono(methyl-branched alkyl)glyceryl ether has the following general formula (), R ₆ -OCH ₂ CH(OH)CH ₂ OH () (wherein R ₆ is a methyl-branched The pearlescent agent dispersion according to claim 1, which is represented by the formula (representing a saturated hydrocarbon group). 6 α-mono(methyl branched alkyl) glyceryl ether is represented by the following formula (), where R ₆ is the following group (), (In the formula, m is an integer from 2 to 14, a is from 3 to
11, and the sum of m and n is from 9 to 21.