JP2004067737A - Method of gelatinizing organic solvent or oils - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a novel method of gelatinizing organic solvents or oils which can form a gel having high strength even in a small amount added, simultaneously not only can easily effect gelatinizing without heating or cooling by merely adding it to an object to be gelatinized at room temperature and but also neither reduces the gel strength nor dissolves the gel even by heating the obtained gel. <P>SOLUTION: The method of gelatinizing organic solvents or fats and oils comprises adding a resin acid and an alkaline earth metal compound to an object to be gelatinized to effect gelatinizing. <P>COPYRIGHT: (C)2004,JPO

Description

【００２３】
実施例２
表２に示したゲル化対象物各１０ｇに、表１に示した重量の不均化ロジン（荒川化学工業（株）製、商品名「ロンヂスＲ」、酸価１５８）３０ｇと水酸化カルシウム７．６ｇ（０．１モル）よりなる混合物の粉末を表１に示す重量を添加し、室温で５分間攪拌した後、静置し、ゲル形成の有無を観察した。結果を表２に示す。
【００２４】
【表２】

【００２５】
実施例３
表３に示したゲル化対象物各１０ｇに、不均化ロジン部分カルシウム塩（荒川化学工業（株）製、商品名「パインクリスタルＫＲ−５０Ｍ」、酸価１０２）３０ｇと水酸化カルシウム７．６ｇ（０．１モル）よりなる混合物の粉末を表１に示した重量を添加し、室温で５分間攪拌した後、静置し、ゲル形成の有無を観察した。結果を表３に示す。
【００２６】
【表３】

【００２７】
実施例４
表４に示したゲル化対象物各１０ｇに、表１に示した重量の精製不均化ロジン（荒川化学工業（株）製、商品名「ＫＲ−６１４」、酸価１７２．５）を溶解した後、水酸化カルシウム５０ｍｇを加え、室温で５分間攪拌した後、静置し、ゲル形成の有無を観察した。結果を表４に示す。
【００２８】
【表４】

【００２９】
実施例５
表５に示したゲル化対象物各１０ｇに、表１に示した重量の精製不均化ロジン（荒川化学工業（株）製、商品名「ＫＲ−６１４」、酸価１７２．５）を溶解した後、水酸化ストロンチウム・８水和物３００ｍｇを加え、室温で５分間攪拌した後、静置し、ゲル形成の有無を観察した。結果を表５に示す。
【００３０】
【表５】

【００３１】
実施例６
表６に示したゲル化対象物各１０ｇに、表１に示した重量の精製不均化ロジン（荒川化学工業（株）製、商品名「ＫＲ−６１４」、酸価１７２．５）を溶解した後、水酸化バリウム・８水和物４００ｍｇを加え、室温で５分間攪拌した後、静置し、ゲル形成の有無を観察した。結果を表６に示す。
【００３２】
【表６】

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for gelling organic solvents or fats and oils. More particularly, the present invention relates to a method for gelling organic solvents, animal and vegetable oils, mineral oils and the like.
[0002]
[Prior art]
Gelling agents are widely used in various applications, such as oil recovery agents, cosmetics, quasi-drugs, viscosity modifiers such as inks, sustained release agents such as agricultural chemicals and fragrances, and processing aids for plastics and rubber. . In recent years, low molecular organic gelling agents have been receiving attention, and various functions have been studied. Known low molecular weight organic gelling agents include sorbitol diacetal, 12-hydroxystearic acid, cholesterol-based amide compounds, sugar derivatives and the like (for example, see page 312 of Gel Handbook, published by NTTS Corporation).
[0003]
However, such known low molecular weight organic gelling agents have not been able to express sufficient functions. For example, in general, a desired gel strength cannot be exhibited unless it is used in a high amount with respect to the gelation target. In addition, most of the gelling agent needs to be added to the gelation target, heated and dissolved once, and then cooled to gelate, so that the operation is complicated or the use is very limited. There are disadvantages such as. Further, once the formed gel is reheated, there is also a fatal disadvantage that the gel strength is reduced or dissolved. Therefore, there is a strong demand for the development of a novel low molecular weight organic gelling agent and a gelling method capable of forming a gel having high gel strength with a small amount of addition.
[0004]
[Problems to be solved by the invention]
In view of the above problems, the present invention can form a gel having a high gel strength with a low addition amount, and can be easily gelled by adding it to a gelation target at room temperature without heating and cooling, It is still another object of the present invention to provide a novel method for gelling an organic solvent or fat or oil in which the gel strength does not decrease or the gel does not dissolve even when the produced gel is heated.
[0005]
[Means for Solving the Problems]
As a result of intensive studies, the present inventor has found that the use of resin acids and alkaline earth metal compounds can achieve the object.
[0006]
That is, the present invention relates to a method for gelling an organic solvent or fats and oils, which comprises adding a resin acid and an alkaline earth metal compound to an object to be gelled to cause gelation.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
The resin acids used in the present invention include, for example, abietic acid, levopimaric acid, neoabietic acid, parastolic acid, pimaric acid, isopimaric acid, sandaracopimaric acid, dehydroabietic acid, dihydroabietic acids, and tetrahydroabietic acids. it can. In addition, a gum rosin, a wood rosin, a tall oil rosin, a disproportionated rosin, a hydrogenated rosin, a dehydrogenated rosin, which is a mixture of the resin acids, and the like can be given. Further, alkaline earth metals such as rosins and partially neutralized metal salts of zinc and aluminum can also be suitably used. Any of these resin acids can be used alone, or two or more can be appropriately used in combination.
[0008]
The alkaline earth metal compound used in the present invention can be used without any particular limitation as long as it is an alkaline earth metal compound which reacts with the above resin acids to form a salt. Metal oxides or alkaline earth metal hydroxides are preferred. Specific examples of the metal compound include magnesium hydroxide, magnesium oxide, calcium hydroxide, calcium oxide, strontium hydroxide, strontium oxide, barium hydroxide, barium oxide, and the like. Any of these alkaline earth metal compounds can be used alone, or two or more can be used in combination as appropriate.
[0009]
By appropriately selecting and combining these resin acids and alkaline earth metal compounds, various objects to be gelled can be gelled. For example, non-polar to medium-polar solvents such as hexane, heptane, octane, cyclohexane, benzene, toluene, and xylene (specifically, solvents having a dielectric constant of about 3.0 or less); gasoline, kerosene, light oil, heavy oil, It can exhibit excellent gelling ability for mineral oils such as crude oil and liquid paraffin; and general animal and vegetable oils such as soybean oil, rapeseed oil and salad oil. Hereinafter, the gelation method of the present invention will be described in detail.
[0010]
First, there is a method in which a resin acid is added to an object to be gelled and dissolved, and then an alkaline earth metal compound is added. In this case, it is preferable to stir so that the alkaline earth metal compound is dispersed throughout the gelling target, and then, by allowing the mixture to stand, desired gelation can be realized.
[0011]
Secondly, there is a method in which an alkaline earth metal compound is dispersed in an object to be gelled, and then resin acids are added to the dispersion. Also in this case, stirring may be performed until the resin acids are dissolved in the gelling target, and then the mixture may be allowed to stand.
[0012]
Third, there is a method in which a resin acid and an alkaline earth metal compound are simultaneously added to an object to be gelled to cause gelation. In this case as well, stirring may be performed until the resin acids dissolve in the gelling target, and then the mixture may be allowed to stand.
[0013]
Fourth, the resin acids and the alkaline earth metal compound may be mixed in advance, and the resulting mixture may be added to an object to be gelled to form a gel. In this case as well, the mixture may be appropriately stirred and then allowed to stand still.
[0014]
In any of the above methods, the amount of the resin acid added to the gelling target can be appropriately determined according to the type of the gelling target. Usually, it is about 0.05 to 30% by weight, preferably 0.1 to 10% by weight, based on the gelation target.
[0015]
In each of the above methods, the shape and size of the alkaline earth metal compound are not particularly limited, but from the viewpoint of enhancing dispersibility in resin acids and gelling targets, it is preferable to use a powder having a relatively uniform shape. . The amount of the alkaline earth metal compound to be added to the gelation target may be appropriately determined according to the amount of the resin acid used, and the molar ratio of the resin acid to the alkaline earth metal compound (resin acid (mole number)) / Alkaline earth metal compound (molar number)) is preferably 1 / 0.1-1 / 10. If the molar ratio is less than 1 / 0.1, sufficient gelation may not occur. When the molar ratio exceeds 1/10, desired gelation can be realized, but a large amount of unreacted alkaline earth metal remains or the cost becomes high, and there is no particular advantage.
[0016]
In the present invention, the temperature for gelling the gelled object is not particularly limited, and can usually be appropriately set within a range from room temperature to the boiling point of the gelled object. It is a feature of the present invention that it can be gelled. When gelling animal or vegetable oils or mineral oils having a high viscosity, heating to increase the dissolution rate of resin acids can shorten the time until gelation is completed.
[0017]
In any of the above methods, the resin acid and the alkaline earth metal compound react with each other in the presence of the gelation target to generate an alkaline earth metal salt of the resin acid, and the metal salt is converted into the gelation target. It is presumed to act as a gelling agent for.
[0018]
The gel obtained by the method of the present invention is different from the gel obtained by using a conventional low-molecular organic gelling agent, in that the strength does not decrease even when heated, and the gel is formed even after re-heating the gel once formed. It has a feature that it does not dissolve in an object to be gelled, and has excellent gelling performance that has never been seen before.
[0019]
【The invention's effect】
The organic gelation method of the present invention is applicable to various gelling objects, for example, non-polar to medium-polar solvents such as hexane, heptane, cyclohexanebenzene, toluene, and xylene (specifically, a dielectric constant of 3.0 or less). Mineral oils such as gasoline, kerosene, light oil, heavy oil, and liquid paraffin; and aromatic solvents such as soybean oil, rapeseed oil, salad oil, etc. A gelling effect can be exhibited. The organic gel obtained by the organic gelation method of the present invention, unlike the organic gel obtained from a conventional low-molecular organic gelling agent, does not decrease in strength or dissolve even when heated. Therefore, the method of the present invention can be widely applied to oil recovery agents, cosmetics, quasi-drugs, viscosity modifiers such as inks, sustained release agents such as agricultural chemicals and fragrances, and processing aids for plastics and rubber.
[0020]
【Example】
Hereinafter, the present invention will be described more specifically with reference to examples, but the present invention is not limited to these examples.
[0021]
Example 1
To 10 g of each gelation target shown in Table 1, a powder of a mixture comprising 30 g (0.1 mol) of dehydroabietic acid and 3.7 g (0.05 mol) of calcium hydroxide was added in the weight shown in Table 1. After stirring at room temperature for 5 minutes, the mixture was allowed to stand, and the presence or absence of gel formation was observed. Table 1 shows the results.
[0022]
[Table 1]

[0023]
Example 2
For each 10 g of the gelation target shown in Table 2, 30 g of disproportionated rosin (trade name “Londe R”, acid value 158, manufactured by Arakawa Chemical Industries, Ltd.) and calcium hydroxide 7 having the weight shown in Table 1 were added. A powder of a mixture consisting of 0.6 g (0.1 mol) was added in the weight shown in Table 1, and the mixture was stirred at room temperature for 5 minutes, allowed to stand, and observed for gel formation. Table 2 shows the results.
[0024]
[Table 2]

[0025]
Example 3
To 10 g of each gelation target shown in Table 3, 30 g of disproportionated rosin partially calcium salt (trade name "Pine Crystal KR-50M", manufactured by Arakawa Chemical Industries, Ltd., acid value 102) and calcium hydroxide 7. 6 g (0.1 mol) of the powder of the mixture was added to the weight shown in Table 1, stirred at room temperature for 5 minutes, allowed to stand, and observed for the presence or absence of gel formation. Table 3 shows the results.
[0026]
[Table 3]

[0027]
Example 4
Purified disproportionated rosin (Arakawa Chemical Industries, Ltd., trade name "KR-614", acid value 172.5) having a weight shown in Table 1 was dissolved in each 10 g of the gelation target shown in Table 4. After that, 50 mg of calcium hydroxide was added, and the mixture was stirred at room temperature for 5 minutes, and then allowed to stand still to observe the presence or absence of gel formation. Table 4 shows the results.
[0028]
[Table 4]

[0029]
Example 5
In each 10 g of the gelation target shown in Table 5, purified disproportionated rosin (trade name "KR-614", acid value 172.5, manufactured by Arakawa Chemical Industries, Ltd.) having the weight shown in Table 1 was dissolved. After that, 300 mg of strontium hydroxide octahydrate was added, and the mixture was stirred at room temperature for 5 minutes, then, allowed to stand, and observed for the formation of gel. Table 5 shows the results.
[0030]
[Table 5]

[0031]
Example 6
In each 10 g of the gelation target shown in Table 6, a purified disproportionated rosin (trade name "KR-614", acid value 172.5, manufactured by Arakawa Chemical Industries, Ltd.) having a weight shown in Table 1 was dissolved. After that, 400 mg of barium hydroxide octahydrate was added, and the mixture was stirred at room temperature for 5 minutes, and then allowed to stand still to observe the presence or absence of gel formation. Table 6 shows the results.
[0032]
[Table 6]

Claims (4)

A method for gelling an organic solvent or fats and oils, comprising adding a resin acid and an alkaline earth metal compound to an object to be gelled to cause gelation. The resin acids are at least one member selected from the group consisting of abietic acid, levopimaric acid, neoabietic acid, parastolic acid, pimaric acid, isopimaric acid, sandaracopimaric acid, dehydroabietic acid, dihydroabietic acids, and tetrahydroabietic acids. Item 7. The gelation method according to Item 1. 3. The method according to claim 1, wherein the alkaline earth metal compound is at least one selected from the group consisting of calcium hydroxide, strontium hydroxide, barium hydroxide, calcium oxide, strontium oxide, and barium oxide. The gelation method according to any one of claims 1 to 3, wherein the gelation target is at least one selected from the group consisting of organic solvents, animal and vegetable oils, and mineral oils.