JPH08245996A - Soap base composition and soap - Google Patents

Abstract

PURPOSE: To provide a soap base composition containing a specific amount of a component composed of a fatty acid salt having plural C=C bonds and an unneutralized free fatty acid, raising foaming performances in a high- temperature to low-temperature region, having improved dissolution and collapse and hardening during low-temperature preservation. CONSTITUTION: This composition comprises (A) 2-4wt.% (preferably 2.2-3.5wt.%) of (i) a 18C fatty acid salt having plural C=C bonds and (ii) an unneutralized free fatty acid and preferably further (B) 1-10wt.% (especially 3-7wt.%) of octadecanoic acid and (C) 20-30wt.% (especially 21-27wt.%) of octadecenoic acid based on the total of the whole fatty acid salt and the unneutralized free fatty acid.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a soap base composition which has improved foaming performance in both high and low temperature ranges and improved not only dissolution but also curing during low temperature storage, and a soap base composition containing the same. It's about soap.

[0002]

BACKGROUND OF THE INVENTION Soap bases used in bar soaps are generally palm stearin or palm obtained by fractionating natural oils such as beef tallow, lard, fish oil, palm oil, palm oil. Olein, soybean oil, olive oil, cottonseed oil, coconut oil, palm kernel oil and other animal and vegetable fats and oils as a raw material, either directly or via a fatty acid or lower alcohol ester, neutral oil saponification method, fatty acid neutralization method, ester saponification method Manufactured by either method. Soap base thus obtained, perfumes and colorants, glycerin, it is widely performed to obtain soap by blending auxiliary components such as EDTA, by these auxiliary components, the foam performance of the soap, Attempts have been made to improve storage stability.

However, it goes without saying that the performance of soap is greatly affected by the carbon number of the fatty acid or fatty acid salt contained in the soap base and the number of unsaturated bonds thereof. As the simplest method of adjusting the composition of the soap base, a method of arbitrarily mixing the above-mentioned two or more kinds of natural oils or decomposed fatty acids thereof or esters thereof is known. Beef tallow, coconut oil, palm kernel A method in which oil and palm stearin oil, or their decomposed fatty acids or their fatty acid esters are mixed is often used. Further, as a method of adjusting this composition, from the viewpoint of odor improvement, a method for producing a soap in which linoleic acid is reduced by hydrogenation (Japanese Patent Application Laid-Open No. 5-222394), in view of dissolution and foam performance, the carbon number is A soap composition in which the total content of a fatty acid salt having 18 or more carbon-carbon double bonds and a fatty acid salt component having 16 carbon atoms and having one or more carbon-carbon double bonds is defined (Japanese Patent Application Laid-Open No. 4-42 No. 117497, Japanese Unexamined Patent Publication No. 6-240300), cosmetic soaps (Japanese Unexamined Patent Publication No. 6-200298) and the like in which the composition ratio of saturated and unsaturated fatty acids having 18 carbon atoms and the oleic acid content are defined.

However, 10% by weight of linoleic acid before hydrogenation is obtained by hydrogenation as disclosed in these publications.
Soap derived from those reduced to below, or fatty acid salt having 18 carbon atoms and 2 or more carbon-carbon double bonds and fatty acid salt having 16 carbon atoms and 1 or more carbon-carbon double bonds Soap derived from the one with the total content of the components specified as 2% by weight has some problems such as odor, dissolution and foam performance, but foam performance under low temperature water and storage at low temperature It is still not sufficient to prevent the hardening of the above, and improvements are needed.

Therefore, an object of the present invention is to provide a soap base composition and soap which have improved dissolution performance and foam performance, and further improved foam performance under low temperature water and curing at low temperature storage. It is a thing.

[0006]

[Means for Solving the Problems] The present inventors have improved the foaming performance at all temperatures (hot water, cold water) in the normal temperature range while achieving both dissolution dissolution and improvement in curing at low temperature storage. In order to provide soap, as a result of earnestly examining the relationship between these performances and the number of unsaturated bonds of all fatty acid salts and unneutralized free fatty acids in the soap base composition, the total amount contained in the soap base composition was determined. Among the fatty acid salt and the unneutralized free fatty acid, the above problem can be solved by containing a fatty acid salt having 18 carbon atoms and two or more carbon-carbon double bonds and an unneutralized free fatty acid component in a specific ratio. Heading, it came to complete this invention.

That is, according to the present invention, a fatty acid salt having 18 carbon atoms and two or more carbon-carbon double bonds and an unneutralized free fatty acid component are added to the total amount of all fatty acid salts and unneutralized free fatty acids. On the other hand, the present invention provides a soap base composition characterized by containing more than 2% by weight and 4% by weight or less, and a soap characterized by containing this soap base composition.

The present invention will be described in detail below. The soap base composition of the present invention comprises a fatty acid salt having 18 carbon atoms and two or more carbon-carbon double bonds and an unneutralized free fatty acid component, the total amount of all fatty acid salts and unneutralized free fatty acids. Against 2
The content is more than 4% by weight and preferably 2.2 to 3.5% by weight. When the content of this component is 2% by weight or less, foaming at low temperature becomes poor, and when it exceeds 4% by weight, storage stability becomes poor and odor is deteriorated.

The octadecanoic acid content of the soap base composition of the present invention is preferably 1 to 10% by weight, preferably 3 to 7% by weight, based on the total amount of all fatty acid salts and unneutralized free fatty acids. More preferably, If the content of octadecanoic acid is less than 1% by weight, it is too soft and easily melts. If the octadecanoic acid content exceeds 10% by weight, the soap becomes extremely hard and the foaming at low temperature tends to decrease.

Furthermore, the composition of the present invention comprises octadecenoic acid in an amount of 20 to 30 relative to the total amount of all fatty acid salts and unneutralized free fatty acids.
It is preferably contained in an amount of 21% by weight, more preferably 21 to 27% by weight. When the octadecenoic acid content is less than 20% by weight, foaming at low temperature tends to decrease and the soap tends to become hard, while when it exceeds 30% by weight, the soap tends to be too soft and melt easily.

Examples of the oil and fat raw material of the soap base composition of the present invention include natural oils such as beef tallow, lard, fish oil, palm oil, palm stearin or palm olein obtained by separating palm oil, soybean oil, olive oil, cottonseed oil. And animal and vegetable oils and fats such as palm oil and palm kernel oil.

Further, the method for producing the soap base composition of the present invention includes a neutral oil saponification method, a fatty acid neutralization method and an ester saponification method for these natural oils and fats directly or through a fatty acid or a lower alcohol ester. It may be produced by any method, and when two or more kinds of natural fats and oils are arbitrarily mixed,
It may be mixed with oil or fat, or may be mixed with a fatty acid or ester passing through. That is, for example, first, each of the above-mentioned natural fats and oils is used alone, or each of the fatty acid esters obtained by transesterification of these fats and oils and lower alcohols is used, the alkali metal hydroxide such as caustic soda and the total carbon number. The method of saponifying with at least one selected from the group consisting of 2 to 9 alkanolamines, or each of the fatty acids obtained by decomposing these oils and fats alone or with a mixture is treated with alkali metal hydroxides such as caustic potash, caustic soda and total The soap base composition is produced by a method of neutralizing with at least one selected from the group consisting of alkanolamines having 2 to 9 carbon atoms.

To obtain the soap base composition of the present invention containing the fatty acid salt of the above-mentioned specific composition and the unneutralized free fatty acid,
Using the oil and fat raw material, before saponifying or neutralizing them,
Constituent fatty acid component having a carbon number of 18 and two or more carbon-carbon double bonds, containing more than 2% by weight and 4% by weight or less of fats or oils or fatty acids passing therethrough. adjust. Also, the raw material of the soap base may be adjusted to have the above composition after saponification or neutralization. As the adjusting method, separation and treatment are carried out by fractional distillation, fractionation, hydrogenation and other methods. After the separation and treatment, fats and oils, fatty acids and fatty acid esters may be separately mixed to obtain the above composition. The separation and treatment method performed here is not particularly limited, and as an example thereof, there is JP-A-4-11.
A method disclosed in Japanese Patent No. 7497, in which only those having 18 carbon atoms are separated, treated and then added again, and vegetable oil having 60% or more of fatty acids having 18 carbon atoms disclosed in JP-A-6-200298. Method for post-addition of derived components, Japanese Patent Application No. 6-237035
There is a treatment method by partial hydrogenation described in the specification, but the treatment method by partial hydrogenation disclosed in Japanese Patent Application No. 6-237035 is preferable in terms of yield and production cost.

Regarding partial hydrogenation, when two or more kinds of natural fats and oils or fatty acids and fatty acid esters derived therefrom are used, even if partial hydrogenation is carried out after mixing them, they are separately hydrogenated separately. You may mix after doing. Of course, it is also possible to mix these with an unhydrogenated product and a completely hardened product to adjust the composition range as described above. Although hydrogenation has been particularly described here, the same adjustment can be made in fractional distillation, fractionation and other methods.

As the alkali metal of the alkali metal hydroxide used for neutralization, sodium, potassium and the like are well known, but any alkali metal hydroxide may be used in the soap base composition of the present invention. , It is not particularly limited because it satisfies the target performance, but from the manufacturing cost,
Sodium hydroxide is preferable, and potassium hydroxide may be added as a mixture because of its solubility.

Among the soaps of the present invention, solid soap is prepared by adding (A) 1-hydroxyethane-1,1-diphosphonate, (B) oxalic acid to the soap base composition obtained as described above. One or more selected from succinic acid, citric acid and salts thereof, (C) higher fatty acid and various other additives are added and mixed, and kneading, extrusion and stamping are performed. In the case of liquid soap, it is possible to omit the steps such as kneading, extruding and stamping.

In addition to the above components, the soap of the present invention contains
If necessary, propylene glycol, which is a compounding ingredient of usual skin cleansing agents, moisturizers such as glycerin, other higher alcohols, other esters, oils such as silicones, fragrances, dyes, ultraviolet absorbers, antioxidants, Preservatives and the like can be added.

[0018]

EXAMPLES The present invention will be described in more detail below with reference to production examples of the soap base composition of the present invention and examples of soap.
The present invention is not limited to these production examples and examples. Incidentally,% in the examples is based on weight unless otherwise specified.

Production Example 1 Purified (RBD) Palm kernel decomposed fatty acid (hereinafter abbreviated as palm kernel fatty acid) and RBD palm stearin decomposed fatty acid (hereinafter abbreviated as palm stearic fatty acid) were mixed at a weight ratio of 50/50. . This mixed fatty acid was partially hydrogenated in the presence of 0.9% Cu-based hydrogenation catalyst (iodine value (IV) = 27), the catalyst was filtered, and the initial fraction was removed by distillation to obtain a fraction. Using the obtained distilled fatty acid as a raw material, a soap base was obtained by a fatty acid neutralization method. The constituent fatty acid composition of the obtained soap base is shown in Table 1.

Production Example 2 Palm nucleus fatty acid was partially hydrogenated in the presence of 400 ppm of Ni-based hydrogenation catalyst (IV = 15), and the catalyst was filtered. On the other hand, palm stearin fatty acid was partially hydrogenated in the presence of 0.15% Cu-based hydrogenation catalyst (IV = 40), and the catalyst was filtered. The two fatty acids were mixed at a weight ratio of 50/50, and then the initial fraction was removed by distillation to obtain a fraction. Using the obtained distilled fatty acid as a raw material, a soap base was obtained by a fatty acid neutralization method. The constituent fatty acid composition of the obtained soap base is shown in Table 1.

Production Example 3 Palm stearic fatty acid was partially hydrogenated in the presence of 0.15% Cu-based hydrogenation catalyst (IV = 40), and the catalyst was filtered. This and palm kernel fatty acid were mixed at a weight ratio of 50/50. afterwards,
A fraction after removing the initial fraction by distillation was obtained. Using the obtained distilled fatty acid as a raw material, a soap base was obtained by a fatty acid neutralization method. The constituent fatty acid composition of the obtained soap base is shown in Table 1.

Production Example 4 Palm stearin fatty acid was partially hydrogenated (IV = 40) in the presence of 0.15% Cu-based hydrogenation catalyst, and the catalyst was filtered. This was mixed with coconut oil-decomposed fatty acid in a weight ratio of 50/50, and then the initial fraction was removed by distillation to obtain a fraction. Using the obtained distilled fatty acid as a raw material, a soap base was obtained by a fatty acid neutralization method. The constituent fatty acid composition of the obtained soap base is shown in Table 1.

Production Example 5 Palm kernel fatty acid methyl ester obtained by transesterification of raw oil and fat with methanol and palm stearin fatty acid methyl ester were mixed at a weight ratio of 50/50. The mixed ester was partially hydrogenated in the presence of 0.4% Cu-based hydrogenation catalyst, the catalyst was filtered, and the initial fraction was removed by distillation to obtain a fraction. Using the obtained distilled fatty acid methyl ester as a raw material, a soap base was obtained by an ester saponification method. The constituent fatty acid composition of the obtained soap base is shown in Table 1.

Comparative Production Example 1 Palm kernel fatty acid and palm stearin fatty acid were mixed at a weight ratio of 50/50. This mixed fatty acid is hydrogenated in the presence of 0.2% Ni-based hydrogenation catalyst, and the reaction is stopped at IV = 18.
After filtering the catalyst, the initial fraction was removed by distillation to obtain a fraction. Using the obtained distilled fatty acid as a raw material, a soap base was obtained by a fatty acid neutralization method. The constituent fatty acid composition of the obtained soap base is shown in Table 1.

Comparative Production Example 2 Palm kernel fatty acid and palm stearic fatty acid were mixed at a weight ratio of 50/50. This mixed fatty acid is hydrogenated in the presence of 0.9% Cu-based hydrogenation catalyst, and the reaction is stopped at IV = 22.
After filtering the catalyst, the initial fraction was removed by distillation to obtain a fraction. Using the obtained distilled fatty acid as a raw material, a soap base was obtained by a fatty acid neutralization method. The constituent fatty acid composition of the obtained soap base is shown in Table 1.

Comparative Production Example 3 Palm kernel fatty acid and palm stearin fatty acid were mixed at a weight ratio of 50/50. From this mixed fatty acid, the first fraction was removed by distillation to obtain a fraction. Using the obtained distilled fatty acid as a raw material, a soap base was obtained by a fatty acid neutralization method. The constituent fatty acid composition of the obtained soap base is shown in Table 1.

[0027]

[Table 1]

Examples 1 to 5 and Comparative Examples 1 to 3 Using the soap bases obtained in Production Examples 1 to 5 and Comparative Production Examples 1 to 3, solid soap was produced by a usual method, and the following tests were conducted. The foam performance and dissolution collapse were evaluated by the method. Table 2 shows the results.

<Test Method> Hand washing was carried out by 10 panelists in normal temperature bubbling 25 ° C. running water.
It was judged according to the following criteria. A. Very good foaming B. C. slightly foaming Foam does not change D. Poor foaming Low temperature foaming Hand wash with running water of 10 ℃ by 10 panelists,
It was judged according to the following criteria. a. Very foamy b. Somewhat good foaming c. Foam does not change d. Poor foaming Melt and collapse Solid soap is cut into 1 cm x 1 cm x 5 cm prisms, immersed in tap water at 25 ° C for 4 hours, and visually checked for pulling up.
It was judged according to the following criteria. 1. Almost no meltdown 2. There is a slight meltdown. There is a slight meltdown 4. There is considerable dissolution collapse. Foaming during low temperature storage Hand wash with 10 ℃ water and store at 0 ℃ for 24 hours. This was repeated for 3 weeks, and the foaming after 3 weeks was judged according to the following criteria. I. No change compared to 3 weeks ago II. Almost no change compared to 3 weeks ago III. Slight decrease in foaming compared to 3 weeks ago IV. Significant decrease in foaming compared to 3 weeks ago

[0030]

[Table 2]

[0031]

The soap containing the soap base composition of the present invention is
The foam performance was improved in both the high temperature region and the low temperature region, and not only the dissolution collapse but also the curing during low temperature storage was improved.

Claims (4)

[Claims] 1. A carbon-carbon double bond having 2 carbon atoms and 2 carbon atoms
A soap base composition, characterized in that it contains more than 2% by weight and 4% by weight or less with respect to the total amount of all fatty acid salts and unneutralized free fatty acids Stuff. 2. The soap base composition according to claim 1, wherein the content of octadecanoic acid is 1 to 10% by weight based on the total amount of all fatty acid salts and unneutralized free fatty acids. 3. The soap base composition according to claim 2, wherein octadecenoic acid is contained in an amount of 20 to 30% by weight based on the total amount of all fatty acid salts and unneutralized free fatty acids. 4. A soap containing the soap base composition according to any one of claims 1 to 3.