Aqueous dispersion of sucrose fatty acid ester

Abstract

To provide a water dispersion containing sucrose fatty acid ester in high concentration that is excellent in productivity, storage stability, and workability and has low viscosity.SOLUTION: A water dispersion of sucrose fatty acid ester contains sucrose fatty acid ester, an anionic surfactant, and water. The anionic surfactant has an IOB value of 1.7 or more.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to an aqueous dispersion of sucrose fatty acid ester. Specifically, it relates to an aqueous dispersion of sucrose fatty acid ester with low viscosity, excellent storage stability and workability even when the concentration of sucrose fatty acid ester is increased. When the concentration of sucrose fatty acid ester is increased, the viscosity is low and it has excellent storage stability and workability. It relates to an aqueous dispersion of sucrose fatty acid ester.

Background Art

[0002] Sucrose fatty acid ester is used in a wide range of fields such as foods, cosmetics, pharmaceuticals, chemical industries, etc., and its purposes also cover various aspects such as emulsification, solubilization, dispersion, antibacterial, and crystal growth inhibition. By appropriately adjusting the degree of substitution of fatty acids and the types of fatty acids constituting sucrose fatty acid ester, it is possible to produce sucrose fatty acid esters with a wide range of HLB values. Moreover, those with a low HLB value dissolve in organic solvents, and those with a high HLB value dissolve in water or alcohol, so they can be used appropriately according to the purpose of use. For example, in food applications, when used for antibacterial purposes in beverages such as coffee and tea, those with a high HLB value are used, and when used for the purpose of inhibiting crystal growth of fats and oils in chocolate, etc., those with a low HLB value can be used. The purposes also cover various aspects such as emulsification, solubilization, dispersion, antibacterial, and crystal growth inhibition. By appropriately adjusting the degree of substitution of fatty acids and the types of fatty acids constituting sucrose fatty acid ester, it is possible to produce sucrose fatty acid esters with a wide range of HLB values. Moreover, those with a low HLB value dissolve in organic solvents, and those with a high HLB value dissolve in water or alcohol, so they can be used appropriately according to the purpose of use. For example, in food applications, when used for antibacterial purposes in beverages such as coffee and tea, those with a high HLB value are used, and when used for the purpose of inhibiting crystal growth of fats and oils in chocolate, etc., those with a low HLB value can be used. >

[0003] However, generally when sucrose fatty acid ester is mixed with water and used, the higher the HLB value of sucrose fatty acid ester as the solute, and the higher the concentration of sucrose fatty acid ester in the solution, the higher the viscosity of the aqueous solution of sucrose fatty acid ester. Therefore, not only does it require a great deal of energy and time to prepare the aqueous solution of sucrose fatty acid ester, but also problems in operation such as difficulty in liquid feeding occur. When used for the above purposes, a low viscosity is required. The higher the HLB value of sucrose fatty acid ester as the solute, and the higher the concentration of sucrose fatty acid ester in the solution, the higher the viscosity of the aqueous solution of sucrose fatty acid ester. Therefore, not only does it require a great deal of energy and time to prepare the aqueous solution of sucrose fatty acid ester, but also problems in operation such as difficulty in liquid feeding occur. When used for the above purposes, a low viscosity ​A dilute aqueous solution of sucrose fatty acid ester had to be used. Also, a highly concentrated aqueous solution Even when storing sucrose fatty acid esters in liquid form, the problem of viscosity increase arises. Because it was difficult to store, it had to be stored in a dilute aqueous solution. Also, the HLB value was low The more nutrient a potato has, the lower its water solubility becomes, so an aqueous solution of sucrose fatty acid ester with a low HLB or The aqueous dispersion was difficult to prepare regardless of the concentration of sucrose fatty acid ester.

[0004] From the perspective of these issues, Patent Document 1 describes lactic acid fatty acid ester salts and succinic acid mono By adding an anionic surfactant selected from glycerides, a sho (a type of glyceride) with an HLB value of 16 is achieved. It is stated that it is possible to reduce the viscosity of aqueous solutions of sugar fatty acid esters. Meanwhile, Patent Document 2 This involves mixing xanthan gum with sucrose fatty acid ester with an HLB value of 3 to create a dispersion. It is stated that it is possible to achieve this. [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 10-114710 [Patent Document 2] Special Publication No. 2020-500022 [Overview of the Initiative] [Problems that the invention aims to solve]

[0006] However, the present inventors have obtained the viscosity of an aqueous solution of sucrose fatty acid ester using the method described in Patent Document 1. When we conducted a study to reduce the viscosity, we were unable to obtain the required low-viscosity aqueous solution, resulting in a solid gel-like consistency. It was found that the components can be obtained. Patent document 1 describes the gelation of an aqueous solution depending on the preparation conditions of the aqueous solution. Since there is a description that this occurs, the aqueous solution preparation method described in Patent Document 1 requires at least work control It can be said that this method is narrow in scope and difficult to apply industrially. On the other hand, Patent Document 2 provides The properties of the dispersion were not described, but the inventors investigated and found that it was an extremely high-viscosity slurry. Only a small amount could be obtained, and it was found that industrial applications for this were also difficult.

[0007] Therefore, against this background, the present invention provides excellent productivity, storage stability, and workability. The objective is to provide a low-viscosity aqueous dispersion of high-concentration sucrose fatty acid ester. [Means for solving the problem]

[0008] However, in light of these circumstances, the inventors diligently conducted research and found that the IOB value is 1.7 or less. The aqueous dispersion of sucrose fatty acid ester containing the above anionic surfactant is a high concentration of sucrose fatty acid ester. Even when used as an aqueous dispersion of sugar fatty acid esters, it exhibits low viscosity, improving productivity, storage stability, and workability. We discovered that the properties were significantly improved, thus achieving the present invention.

[0009] In other words, the gist of the present invention is a sucrose fatty acid ester containing an anionic surfactant and water. An aqueous dispersion of sucrose fatty acid ester characterized by comprising an anionic surfactant, Sucrose fatty acid E is an anionic surfactant characterized by having an IOB value of 1.7 or higher. It is an aqueous dispersion of tel. [Effects of the Invention]

[0010] The aqueous dispersion of sucrose fatty acid esters of the present invention is a highly concentrated aqueous dispersion of sucrose fatty acid esters. It has low viscosity even in liquid form, and offers excellent productivity, storage stability, and workability. [Modes for carrying out the invention]

[0011] Hereinafter, the present invention will be described in detail. The aqueous dispersion of sucrose fatty acid ester of the present invention contains sucrose fatty acid ester, anionic surfactant and water, and is characterized in that the IOB value of such anionic surfactant is 1.7 or more and it is a feature.

[0012] 〔Sucrose Fatty Acid Ester〕 As the sucrose fatty acid ester used in the present invention, known general sucrose fatty acid esters can be used, and at least one of the eight hydroxyl groups of sucrose forms an ester structure with a fatty acid.

[0013] For example, the structural part derived from the fatty acid of the sucrose fatty acid ester has 10 to 30 carbon atoms ( preferably 12 to 28 carbon atoms, more preferably 12 to 22) of saturated or unsaturated fatty acid derived structural parts, specifically, structural parts derived from lauric acid, myristic acid, palmitic acid, oleic acid, stearic acid, and erucic acid, and sucrose fatty acid esters can be used. And depending on the purpose of use of the sucrose fatty acid ester, as the structural part derived from the fatty acid, those having only one structural part derived from a fatty acid, and those having a structural part derived from two or more fatty acids combined in a specific ratio can be properly selected and used.

[0014] Specifically, as the above sucrose fatty acid ester, "Ryoto Sugar Ester S-3 70", "Ryoto Sugar Ester S-570", "Ryoto Sugar Ester S -970", "Ryoto Sugar Ester S-1170", "Ryoto Sugar Ester S -1570", "Ryoto Sugar Ester S-1670", "Ryoto Sugar Gar Ester P-170", Ryoto Sugar Ester P-1670, Ryoto - Sugar ester M-1695", "Ryoto sugar ester O-170", "R "Yoto Sugar Ester O-1570", "Ryoto Sugar Ester L-195" "Ryoto Sugar Ester L-595", "Ryoto Sugar Ester L-16 95", "Ryoto Sugar Ester B-370", "Ryoto Sugar Ester E "R-190", "Ryoto Sugar Ester POS-135" (both from Mitsubishi Chemical Industries) (Manufactured by [Company Name]) "DK Ester F-160", "DK Ester F-140", "DK Ester "Lu F-110", "DK Ester F-70", "DK Ester F-50" (all from Daiichi Kogyo) Examples include pharmaceutical companies (manufactured by Gyosei Pharmaceutical Co., Ltd.), etc. Among these, using sucrose fatty acid esters that are solid at temperatures above 0°C is the water of the present invention. From the perspective of industrial use of dispersions, it is desirable that the range of applications be broadened. These sucrose fatty acid esters may be used individually or mixed in combination of two or more types. It is possible to stay there.

[0015] [Anionic surfactants] The anionic surfactant used in this invention must have an IOB value of 1.7 or higher. Preferably, it is 1.75 or higher, and particularly preferably 1.78 or higher. Also, the usual IOB value The upper limit is 6.0. If the IOB value is below the lower limit or above the upper limit, the effects of the present invention will not be exhibited, which is undesirable. stomach.

[0016] IOB value refers to the Inorganic / Organic Balance. It is an abbreviation for ratio, and represents the ratio of inorganic values ​​to organic values, and the polarity of organic compounds. It is an indicator that shows the degree of [something]. Specifically, the IOB value is defined as "IOB value = inorganic value It is expressed as "organic value". Here, for each of "inorganic value" and "organic value" For example, for one carbon atom in a molecule, the "organicness value" is 20, and for one light metal, "Inorganic value" is 500, and so on, depending on the type of atom or functional group, "organic" "Property values" are set, and the "inorganic property values" of all atoms and functional groups in an organic compound are set. The IOB value of the organic compound can be calculated by accumulating the "properties value". For example, "New Edition: Organic Conceptual Diagrams: Fundamentals and Applications" (by Yoshio Koda, Shiro Sato, and Yoshio Honma, published by Sankyo Publishing). The 2008 edition contains descriptions of the physical properties and calculation methods for each item, and in this invention... The IOB value is calculated using the method described in this book.

[0017] The fatty acids that make up anionic surfactants are not particularly limited, but they usually have 1 carbon atom. These are linear or branched molecules with 0 to 22 chains, such as capric acid, lauric acid, and myristic acid. , stearic acid, arachidic acid, oleic acid, elaidic acid, ricinoleic acid, 2-butyric acid Examples include ooctanoic acid. Hydroxycarboxylic acids contain 1 to 3 water molecules per molecule. It is an aliphatic carboxylic acid with 3 to 10 carbon atoms, having an acid group and 1 to 3 carboxylic acid groups. The salt is Alkali metals such as sodium, potassium, calcium, and magnesium, and alkaline earth metals. Although various surfactants are used, sodium is preferred because it is simpler. These anionic surfactants are simple It can be used alone or in combination of two or more types in any ratio.

[0018] The amount of anionic surfactant in an aqueous dispersion of sucrose fatty acid esters is... The amount is preferably 0.1 to 50% by weight relative to the fatty acid ester, and particularly preferably 3% by weight. The amount is 30% by weight, more preferably 4-25% by weight. If the amount of anionic surfactant is too low, the viscosity of the sucrose fatty acid ester aqueous solution will decrease. The lowering effect tends to be difficult to obtain sufficiently, and using too much does not fully reduce viscosity. Furthermore, it tends to negatively affect the inherent performance of sucrose fatty acid esters.

[0019] 〔water〕 The water used in this invention reacts with the components in the sucrose aqueous dispersion of this invention to form water-insoluble components, etc. Any water that does not generate components that inhibit dispersion is acceptable, such as hard water, soft water, or deionized water. Examples include ultrapure water. Furthermore, the reaction with anionic surfactants in this invention is suppressed. From this perspective, it is preferable to use neutral or basic water.

[0020] The dispersion of the present invention contains, in addition to the above-mentioned components, other components to the extent that they do not impair the effects of the present invention. Additives such as low-molecular-weight and high-molecular-weight emulsifiers, alcohol-based compounds, and hydrophobic substances are incorporated. It is possible.

[0021] Specific examples of low molecular weight emulsifiers include fatty acid diethanolamide and polyoxyethylene alcohol. Nonionic low-molecular-weight milks such as kill ether and polyoxyethylene alkylphenyl ether Reacting agent, α-sulfo fatty acid ester salt, alkylbenzene sulfonate, alkyl sulfate, Anionic compounds such as alkyl ether sulfates and alkyl sulfate triethanolamine Examples include low-molecular-weight emulsifiers.

[0022] Specific examples of polymer emulsifiers include polyvinyl alcohol and polyoxyethylene alkyl Ether, polyoxypropylene-polyoxyethylene block copolymer, polymerized ether Nonionic polymer emulsifiers such as phenylalanine, styrene-maleate copolymer, naphthalene sulfur Formalin-bound compounds of honates, polyacrylates, carboxymethylcellulose metal salts, Olefin maleate copolymer, polystyrene sulfonate, acrylamide Examples include lylate copolymers and anionic polymer emulsifiers such as alginates.

[0023] Examples of alcohol compounds include higher alcohols such as cetanol and stearyl alcohol. Alcohol, (poly)ethylene glycol, (poly)propylene glycol, polytetra Methylene ether glycol, polycarbonate diol, glycerin, trimethylol Propane, pentaerythritol, erythritol, sorbitol, isosorbide, etc. Examples include polyols.

[0024] Specific examples of hydrophobic substances include solid paraffin, microcrystalline wax, and celery. Hydrocarbon compounds such as synthetic wax, polyethylene wax, and polypropylene wax. These are some examples.

[0025] Among these, (poly)ethylene glycol, (poly)propylene glycol, and tri Methylolpropane, polytetramethylene ether glycol, polycarbonate diol Ingredients: Glycerin, Trimethylolpropane, Pentaerythritol, Sorbitol, Iso Polyols such as solvents tend to have high dispersion stability and are therefore preferred. Furthermore, the addition of hydrocarbon compounds such as solid paraffin suppresses foaming, This is preferable because it tends to make the preparation and handling of the dispersion easier.

[0026] The amount of each additive is set appropriately for each additive, for example, sucrose fatty acid sucrose Preferably, the amount is 50% by weight or less relative to the total amount of tel and anionic surfactant, in particular Preferably, the amount is 30% by weight or less. If the amount is too high, the viscosity and particle size of the dispersion will increase. There is a tendency.

[0027] Furthermore, the dispersion of the present invention may contain, in addition to the above-mentioned components, other components to the extent that they do not impair the effects of the present invention. Antifoaming agents, preservatives, smoothing agents, antistatic agents, flame retardants, tackifiers, fillers, UV absorbers, Other additives such as colorants, antioxidants, functional dyes, and organic solvents may be added. The amount of each additive is set appropriately, for example, sucrose fatty acid ester Preferably, the amount of the total amount of the anionic surfactant is 30% by weight or less, and particularly preferably... Or it should be 20% by weight or less.

[0028] [Aqueous dispersion of sucrose fatty acid ester] The aqueous dispersion of sucrose fatty acid ester of the present invention is a known general aqueous dispersion or emulsifier. It can be manufactured in accordance with the law. For example, regarding the order in which each ingredient is added, i) Sucrose fatty acid ester and a ii) Mixing an anionic surfactant with water iii) A method of dispersing the sucrose fatty acid ester and then adding it, Methods include dispersing the mixture in water and then adding an anionic surfactant, but workability and production In terms of productivity, method i) or ii) is preferred.

[0029] For example, regarding the mixing method of each component, the mixing time for each step is usually 10 minutes to 24 hours. The ideal mixing time is 20 minutes to 6 hours. If the mixing time is too short, a sufficient dispersion may not be obtained. Yes, if the length is too long, the productivity of the dispersion decreases.

[0030] The mixing temperature for each step is usually 0 to 100°C, preferably 40 to 90°C. If the temperature is too high, some of the water may solidify or evaporate, potentially preventing a sufficient dispersion from being obtained. Furthermore, regarding the cooling method when the temperature exceeds room temperature, the method involves rapid cooling by contact with a refrigerant. Using methods commonly used for cooling, such as allowing it to cool naturally by exposing it to the air environment, Yes, it is possible. These methods can be selected from a variety of options, taking into account the production volume and industrial feasibility of the dispersion to be prepared. It can be done.

[0031] The pressure for each process can be at atmospheric pressure, or it can be carried out under pressurized or reduced pressure. The method involves determining the properties of the dispersion to be prepared (concentration, viscosity, particle size, production volume, etc.) and the following: Various methods are selected depending on the distributed method.

[0032] Methods for mixing each component and dispersing the sucrose fatty acid ester in water include stirring, shaking, Using methods that apply various shear forces, such as ultrasound and mechanical extrusion, which are commonly used when preparing dispersions. These methods can be used to prepare the properties of the dispersion (concentration, viscosity, particle size, production). Various options are selected depending on the quantity, etc.

[0033] The sucrose fatty acid ester concentration of the aqueous dispersion of the sucrose fatty acid ester obtained in this way The concentration is preferably 1 to 50% by weight of the entire aqueous dispersion, and particularly preferably 3% by weight. The amount is 40% by weight, more preferably 5-30% by weight. If the concentration of sucrose fatty acid ester is too high, the effect of adding anionic surfactant cannot be obtained. It tends to be difficult to dissolve and the viscosity of the aqueous dispersion does not decrease sufficiently, and if it is too low, the aqueous dispersion contains additives, etc. When used as such, sucrose fatty acid esters tend not to exhibit their intended function.

[0034] The viscosity of the aqueous dispersion of the sucrose fatty acid ester obtained in this way is 5,000 mP. It is preferable that it is less than or equal to a·s, particularly preferably less than or equal to 3,000 mPa·s, and even more preferably less than or equal to Or it is 500 mPa·s or less. If the viscosity is too high, the workability of the dispersion will decrease. The viscosity of this invention was measured using a B-type viscometer at a temperature of 25°C and a shear rate of 100r. These values ​​were measured in pm (unit: mPa·s).

[0035] The average particle size of the aqueous dispersion emulsion of sucrose fatty acid ester in the present invention is 100 μm. It is preferable that the size be smaller, particularly preferably 50 μm or less, and even more preferably 10 μm or less. Below is the result. If the average particle size is too large, the workability when handling the dispersion will decrease. The average particle size of this invention is determined using a laser diffraction device (laser diffraction scattering method) and is 25 These values ​​were measured under temperature conditions of °C (unit: μm).

[0036] The aqueous dispersion of sucrose fatty acid ester of the present invention can be added as an additive to foods, cosmetics, pharmaceuticals, etc. Uh, anti-fogging agents, antistatic agents, compatibilizers, paints, coatings, water and oil resistance imparting agents to paper, Adhesives, dispersants for various organic and inorganic particles, and additives for thermoplastic and thermosetting resins. It is useful for various applications, including pharmaceuticals. [Examples]

[0037] The present invention will be described in more detail below with reference to examples, but the present invention will not exceed its gist. The following embodiments are not limited to those described below. Furthermore, "parts" refers to parts by weight.

[0038] <Viscosity Evaluation> The viscosity of the prepared sucrose fatty acid ester dispersion was measured one day after preparation and evaluated according to the following criteria. It was worthwhile. Viscosity was measured using a B-type viscometer at a temperature of 25°C and a shear rate of 100 rpm. Measurements were taken (unit: mPa·s). (Viscosity evaluation criteria) 〇...500mPa·s or less △···Greater than 500 mPa·s and less than 5000 mPa·s ×...5000mPa·s or more

[0039] <Evaluation of average particle size> The average particle size of the prepared sucrose fatty acid ester dispersion one day after preparation was measured using a laser diffraction device. (Measured using Horiba's "Partica LA-950V2" and evaluated according to the following criteria) It was worth it. (Average particle size evaluation criteria) 〇...30μm or less △···Greater than 30 and smaller than 100 μm ×...100μm or more

[0040] [Example 1] Stearic acid-based sucrose fatty acid ester (product name: Ryoto Sugar Ester S-16) 70. Manufactured by Mitsubishi Chemical Foods Corporation, HLB value: 16) 9.9 parts, and anionic surfactant The agent used is sodium stearyl fumarate (manufactured by Tokyo Chemical Industry Co., Ltd., IOB value: 1.78). 0.1 parts were added to 90 parts of water and heated to 80°C, then stirred and dissolved for 60 minutes. Thickening due to gelation was confirmed. Subsequently, it was rapidly cooled to 25°C in an ice bath to reduce viscosity. By doing so, an aqueous dispersion with a sucrose fatty acid ester concentration of 9.9% was obtained. The viscosity and average particle size of aqueous dispersions of fatty acid esters were measured, and the results are shown in Table 1.

[0041] [Example 2] Stearic acid-based sucrose fatty acid ester (product name: Ryoto Sugar Ester S-16) 70. Manufactured by Mitsubishi Chemical Foods Corporation, HLB value: 16) 9.5 parts, and anionic surfactant The agent used is sodium stearyl fumarate (manufactured by Tokyo Chemical Industry Co., Ltd., IOB value: 1.78). 0.5 parts was added to 90 parts of water and heated to 80°C, then stirred and dissolved for 60 minutes. Thickening due to gelation was confirmed. Subsequently, it was rapidly cooled to 25°C in an ice bath to reduce viscosity. By doing so, an aqueous dispersion with a sucrose fatty acid ester concentration of 9.5% was obtained. The viscosity and average particle size of aqueous dispersions of fatty acid esters were measured, and the results are shown in Table 1.

[0042] [Example 3] In Example 2, during the cooling process after preparing the aqueous dispersion, the room was left to cool slowly to 25°C. A dispersion with a sucrose fatty acid ester concentration of 9.5% was obtained using the same method as in Example 2, except for the other difference. The viscosity and average particle size of the obtained sucrose fatty acid ester dispersion were measured, and the results are shown in Table 1. Ta.

[0043] [Example 4] Stearic acid-based sucrose fatty acid ester (product name: Ryoto Sugar Ester S-16) 70. Manufactured by Mitsubishi Chemical Foods Corporation, HLB value: 16) 9.0 parts, and anionic surfactant The agent used is sodium stearyl fumarate (manufactured by Tokyo Chemical Industry Co., Ltd., IOB value: 1.78). 1.0 part was added to 90 parts of water and heated to 80°C, then stirred and dissolved for 60 minutes. Thickening due to gelation was confirmed. Subsequently, it was rapidly cooled to 25°C in an ice bath to reduce viscosity. By doing so, an aqueous dispersion with a sucrose fatty acid ester concentration of 9.0% was obtained. The viscosity and average particle size of aqueous dispersions of fatty acid esters were measured, and the results are shown in Table 1.

[0044] [Example 5] Sodium stearate (product name: Sodium Stearate) is used as an anionic surfactant. The same method as in Example 1, except that a product manufactured by Nitto Chemical Industries, Ltd. (IOB value: 1.81) was used. A sucrose fatty acid ester aqueous dispersion with a concentration of 9.5% was obtained. The viscosity and average particle size of the aqueous dispersion were measured, and the results are shown in Table 1.

[0045] [Example 6] Stearic acid-based sucrose fatty acid ester (product name: Ryoto Sugar Ester S-16) 70. Manufactured by Mitsubishi Chemical Foods Corporation, HLB value: 16) 10.0 parts, and an anionic interface activity As a quenching agent, sodium stearate (product name: sodium stearate, Nitto Chemical Industries, Ltd.) (Manufactured by [Company Name], IOB value: 1.81) Add 0.5 parts to 90 parts water, heat to 80°C and stir for 60 minutes. It was mixed and dissolved. During this process, thickening due to gelation was observed when heated. Afterwards, it was placed in an ice bath until it reached 25°C. By rapidly cooling and reducing viscosity, a water content of 10% sucrose fatty acid ester is achieved. A dispersion was obtained. The viscosity and average particle size of the obtained aqueous dispersion of sucrose fatty acid ester were measured, and the results were determined. The results are shown in Table 1.

[0046] [Example 7] As an anionic surfactant, sodium myristate (manufactured by Tokyo Chemical Industry Co., Ltd., IOB) Except for using the value 2.32, the sucrose fatty acid ester concentration was 9.5 using the same method as in Example 2. A % aqueous dispersion was obtained. The viscosity and average particle size of the obtained aqueous dispersion of sucrose fatty acid ester were measured. The results were determined and are shown in Table 1.

[0047] [Example 8] Sodium laurate (manufactured by Tokyo Chemical Industry Co., Ltd., IOB value) is used as an anionic surfactant. Except for using 3.13), the sucrose fatty acid ester concentration was 9.5% using the same method as in Example 2. An aqueous dispersion was obtained. The viscosity and average particle size of the obtained aqueous dispersion of sucrose fatty acid ester were measured. The results are shown in Table 1.

[0048] [Example 9] Stearic acid-based sucrose fatty acid ester (product name: Ryoto Sugar Ester S-11) 70. Manufactured by Mitsubishi Chemical Foods Corporation, HLB value: 11) 8.0 parts, and anionic surfactant Sodium stearate (product name: Sodium Stearate, manufactured by Nitto Chemical Industries, Ltd.) is used as an agent. (Manufactured by [company name], IOB value: 1.81) Add 2.0 parts to 90 parts water, heat to 80°C and stir for 60 minutes. It dissolved. During this process, thickening due to gelation was observed when heated. Afterwards, it was cooled to 25°C in an ice bath. By rapidly cooling and reducing viscosity, an aqueous dispersion with a sucrose fatty acid ester concentration of 8.0% is obtained. The viscosity and average particle size of the obtained aqueous dispersion of sucrose fatty acid ester were measured, and the results were obtained. This is shown in Table 1.

[0049] [Example 10] Stearic acid-based sucrose fatty acid ester (product name: Ryoto Sugar Ester S-37) 0. Manufactured by Mitsubishi Chemical Foods Corporation, HLB value: 3) 8.0 parts, and an anionic surfactant Sodium stearate (product name: Sodium Stearate, manufactured by Nitto Chemical Industries, Ltd.) (IOB value: 1.81) Add 2.0 parts to 90 parts of water, heat to 80°C, and stir for 60 minutes until dissolved. Afterward, the mixture is rapidly cooled to 25°C in an ice bath to obtain a dispersion with a sucrose fatty acid ester concentration of 8.0%. The viscosity and average particle size of the obtained sucrose fatty acid ester dispersion were measured, and the results are shown in Table 1. I showed it.

[0050] [Example 11] Stearic acid-based sucrose fatty acid ester (product name: Ryoto Sugar Ester S-37) 0. Manufactured by Mitsubishi Chemical Foods Corporation, HLB value: 3) 16.0 parts, and an anionic surfactant. As an example, sodium stearate (product name: sodium stearate, manufactured by Nitto Chemical Industries, Ltd.) Made in Japan, IOB value: 1.81) 3.0 parts, other additives include trimethylolpropane (Tokyo Add 1.0 part of (manufactured by Kasei Kogyo Co., Ltd.) to 80 parts of water, heat to 80°C, and stir for 60 minutes until dissolved. Then, the mixture is rapidly cooled to 25°C in an ice bath to obtain a dispersion with a sucrose fatty acid ester concentration of 16.0%. The viscosity and average particle size of the obtained sucrose fatty acid ester dispersion were measured, and the results are shown in Table 1. did.

[0051] [Example 12] Stearic acid-based sucrose fatty acid ester (product name: Ryoto Sugar Ester S-37) 0. Manufactured by Mitsubishi Chemical Foods Corporation, HLB value: 3) 16.0 parts, and an anionic surfactant. As an example, sodium stearate (product name: sodium stearate, manufactured by Nitto Chemical Industries, Ltd.) Made from polyethylene glycol (product code: 1.81), with an IOB value of 3.0 parts, and other additives including polyethylene glycol (product code: 3.0 parts). Add 1.0 part of PEG-1540 (manufactured by Sanyo Chemical Industries, Ltd.) to 80 parts of water and heat to 80°C. After stirring and dissolving for 60 minutes, rapidly cool to 25°C in an ice bath to obtain the sucrose fatty acid ester concentration. A 16.0% dispersion was obtained. The viscosity and average particle size of the obtained sucrose fatty acid ester dispersion were determined. Measurements were taken, and the results are shown in Table 1.

[0052] [Example 13] Stearic acid-based sucrose fatty acid ester (product name: Ryoto Sugar Ester S-37) 0. Manufactured by Mitsubishi Chemical Foods Corporation, HLB value: 3) 13.0 parts, and an anionic surfactant. As an example, sodium stearate (product name: sodium stearate, manufactured by Nitto Chemical Industries, Ltd.) Made from 3.0 parts of a material with an IOB value of 1.81, and other additives including solid paraffin (melting point 56-5). Add 4.0 parts of (manufactured by Kishida Chemical Co., Ltd.) to 80 parts of water, heat to 80°C, and stir for 60 minutes. After dissolution, rapidly cool to 25°C in an ice bath to obtain a sucrose fatty acid ester concentration of 16.0%. A dispersion was obtained. The viscosity and average particle size of the obtained sucrose fatty acid ester dispersion were measured, and the results were obtained. This is shown in Table 1.

[0053] [Comparative Example 1] Stearic acid-based sucrose fatty acid ester (product name: Ryoto Sugar Ester S-16) 70. Add 10.0 parts of Mitsubishi Chemical Foods Corporation's product (HLB value: 16) to 90 parts of water, and 8 After heating to 0°C and stirring for 60 minutes to dissolve, the mixture was rapidly cooled to 25°C in an ice bath, resulting in an increase in volume. No viscous, low-viscosity sucrose fatty acid ester dispersion was obtained. Viscosity and average particle size results were obtained. This is shown in Table 1.

[0054] [Comparative Example 2] As an anionic surfactant, propylene glycol monostearate (product name: PS- The same method as in Example 2 was used, except that a 200V (Kao Corporation, IOB value: 0.38) was used. An attempt was made to obtain a dispersion with a sucrose fatty acid ester concentration of 9.5%, but it thickened, resulting in a low-viscosity sucrose fat. A fatty acid ester dispersion was not obtained. The viscosity and average particle size results are shown in Table 1.

[0055] [Comparative Example 3] As an anionic surfactant, monoglyceride succinate (product name: Step SS, Kao) Except for using a sucrose fatty acid solution manufactured by (Co., Ltd., IOB value: 0.74), the same method as in Example 2 was used. An attempt was made to obtain a dispersion with a 9.5% ester concentration, but it thickened, resulting in a low-viscosity sucrose fatty acid ester dispersion. No liquid was obtained. The viscosity and average particle size results are shown in Table 1.

[0056] [Comparative Example 4] As an anionic surfactant, sodium stearoyl lactate (manufactured by Tokyo Chemical Industry Co., Ltd., I Except for using an OB value of 1.60), the sucrose fatty acid ester concentration was 9 in the same manner as in Example 2. An attempt was made to obtain a 0.5% dispersion, but it thickened, and a low-viscosity sucrose fatty acid ester dispersion was obtained. None were found. The results for viscosity and average particle size are shown in Table 1.

[0057] [Comparative Example 5] Stearic acid-based sucrose fatty acid ester (product name: Ryoto Sugar Ester S-37) 0. Manufactured by Mitsubishi Chemical Foods Corporation, HLB value: 3) 10.0 parts and xanthan gum (Tokyo Chemical) Add 0.1 parts of (manufactured by Seikogyo Co., Ltd.) to 90 parts of water, heat to 80°C and stir for 60 minutes, then 2 When rapidly cooled to 5°C in an ice bath, S-370 precipitated, and a dispersion was obtained. It wasn't there.

[0058] [Table 1]

[0059] From Table 1 above, the anionic surfactant used in the example is different from the anionic surfactant used in the comparative example. It is clear that a low-viscosity aqueous dispersion can be obtained by using a surfactant. In particular, comparing Example 2 and Example 3, despite different preparation conditions, the same amount was obtained. A spray solution has been obtained, and the aqueous dispersion of sucrose fatty acid ester of the present invention exhibits excellent industrial workability. It is clear that this is the case. Furthermore, comparing Examples 5, 9, and 10, we found that sucrose fatty acid e has significantly different HLB values. By using the same anionic surfactant for the sterol dispersion, low viscosity dispersions are achieved in both cases. Since a liquid can be obtained, the sucrose fatty acid ester dispersion of the present invention is used in the sucrose fatty acid ester It is also clear that it is highly versatile regardless of the type of stealth device. Therefore, the storage and stirring / mixing of sucrose fatty acid ester in a high-concentration dispersion state are important. This is expected to improve work efficiency. [Industrial applicability]

[0060] The aqueous dispersion of sucrose fatty acid ester of the present invention can be added as an additive to foods, cosmetics, pharmaceuticals, etc. Uh, anti-fogging agents, antistatic agents, compatibilizers, paints, coatings, water and oil resistance imparting agents to paper, Adhesives, dispersants for various organic and inorganic particles, and additives for thermoplastic and thermosetting resins. It is useful for various applications, including pharmaceuticals.

Claims

1. A sucrose fatty acid ester coating aqueous dispersion characterized by containing a sucrose fatty acid ester, an anionic surfactant, and water, The aqueous dispersion contains sucrose fatty acid ester at a concentration of 5 to 50% by weight. The anionic surfactant is contained in an amount of 0.1 to 50% by weight relative to the sucrose fatty acid ester. The additive is contained in an amount of 50% by weight or less relative to the total of the sucrose fatty acid ester and the anionic surfactant. An aqueous dispersion of sucrose fatty acid ester for coating, characterized in that the IOB value of the anionic surfactant is 1.7 or higher.

2. The aqueous dispersion for coating sucrose fatty acid ester according to claim 1, characterized in that the average particle size of the emulsion in the aqueous dispersion, as measured by laser diffraction scattering, is less than 100 μm.

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