JPH08311497A - Fatty acid salt composition - Google Patents

Abstract

PURPOSE: To obtain an odorless fatty acid salt compsn. well soluble in water, high in detergency and suitable for washing. CONSTITUTION: This fatty acid salt compsn. comprises salt of (a) 40-70wt.% 12-14C satd. fatty acid, (b) 10-30wt.% 18C fatty acid having 2 double bonds, (c) 10-30wt.% 18C fatty acid having 1 double bond, (d) 5-20wt.% 16-18C satd. fatty acid, and (e) 0-10wt.% 5-54C fatty acid other than the components (a) to (d), provided that the salts are those of at least one selected from among alkali metals, alkanolamines and ammonium.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a fatty acid salt composition. More specifically, it relates to a fatty acid salt composition having good solubility in water, high detergency, and no offensive odor, and particularly to a fatty acid salt composition suitable as laundry soap.

[0002]

2. Description of the Related Art Generally, laundry soap is a composition composed of a fatty acid salt and auxiliary components such as an antioxidant, a builder, a bleaching agent and a fragrance, and the fatty acid salt is greatly involved in the quality of the performance. . The fatty acid salt used for laundry soap is usually a composition of a plurality of types of fatty acid salt having 12 to 18 carbon atoms, and its composition determines performances such as foaming, oxidation stability and detergency. Solubility in water is one of the important performances required for laundry soap, but solubility in water is important especially in winter because it is often used at low temperature. In order to improve the solubility in water, it is advisable to increase the content of the fatty acid salt having a short carbon number in the fatty acid salt composition. However, since the detergency of a fatty acid salt having a short carbon number is low, excessive use causes a problem of low detergency. In order to solve this problem, for example, Japanese Patent Application Laid-Open No. 54-16513 discloses a technique using a salt of a branched saturated fatty acid. However, even such laundry soap does not have sufficiently satisfactory solubility in water and detergency. It is also known that the content of unsaturated fatty acid salt in the fatty acid salt composition may be increased in order to increase the solubility in water. But,
Since unsaturated fatty acid salts have poor oxidative stability, excessive use thereof causes a bad odor, which is a problem. Antioxidants are often added to prevent bad odors,
Antioxidants can cause the coloring of soaps and their use is limited. As described above, at present, there is no fatty acid salt composition capable of simultaneously satisfying the solubility in water, the detergency, and the low odor required for laundry soap.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a fatty acid salt composition which has good solubility in water, high detergency and does not give off a bad odor.

[0004]

Means for Solving the Problems As a result of intensive studies made by the present inventors in view of such problems, the fatty acid salt composition having a specific alkyl composition has a very good solubility in water and a detergency. It was found that the cost was extremely high and the odor was low, and the present invention was completed. That is, the present invention provides the following components (a) to (e): Component (a); 40 to 7 saturated fatty acids having 12 to 14 carbon atoms.
0% by weight Component (b); 10 to 30% by weight of fatty acid having 18 carbon atoms and 2 double bonds Component (c); 10 to 30% by weight of fatty acid having 18 carbon atoms and 1 double bond (D); saturated fatty acid salt having 16 to 18 carbon atoms 5 to 20% by weight in terms of fatty acid component (e); carbon number 5 not corresponding to components (a) to (d)
A composition of a fatty acid salt consisting of 0 to 10% by weight of a fatty acid of 54 to 54, wherein the salt is one or more fatty acid salt composition selected from an alkali metal salt, an alkanolamine salt and an ammonium salt.

The component (a) used in the present invention has 12 to 12 carbon atoms.
Examples of 14 saturated fatty acids include lauric acid and myristic acid. These fatty acids may be used alone or in combination of two or more. The amount of the fatty acid (a) used in the present invention is 40 to 70% by weight, preferably 50 to 65% by weight. If it is less than 40% by weight, the solubility in water will be poor, and if it exceeds 70% by weight, the detergency will be lowered. In addition, in this invention, the ratio of each fatty acid salt in the soap composition was shown based on the fatty acid part which comprises a fatty acid salt (fatty acid before constituting a salt).

The component (b) used in the present invention is a fatty acid having 18 carbon atoms and two double bonds, and specific examples thereof include trans-8-trans 10-octadecadienoic acid, linoleic acid and linoelaidic acid. , Cis-9-trans-11-
Octadecadienoic acid, trans-10-cis-12-octadecadienoic acid, cis-9-cis-12-octadecadienoic acid, cis-10-cis-12-octadecadienoic acid, trans-10-trans- Fatty acids such as 12-octadecadienoic acid, trans-9-trans-11-octadecadienoic acid, trans-8-trans-10-octadecadienoic acid, and trans-9-trans-11-octadecadienoic acid. To be These fatty acids may be used alone or in combination of two or more. The amount of fatty acid (b) is 10 to 30% by weight, preferably 15
~ 25% by weight. If it is less than 10% by weight, the solubility in water becomes low, which is not preferable, and if it exceeds 30% by weight, a bad odor becomes strong, which is not preferable.

The component (c) used in the present invention is a fatty acid having 18 carbon atoms and one double bond, and specifically, cis-2-octadecenoic acid, trans-2-octadecenoic acid, cis-3-. Octadecenoic acid, trans-3-octadecenoic acid, cis-4-octadecenoic acid, trans-4-
Octadecenoic acid, cis-5-octadecenoic acid, trans-5-octadecenoic acid, cis-6-octadecenoic acid, trans-6-octadecenoic acid, cis-7-octadecenoic acid, trans-7-octadecenoic acid, cis-8-octadecene Acid, trans-8-octadecenoic acid, oleic acid, elaidic acid, cis-10-octadecenoic acid, trans-10-octadecenoic acid, cis-11-octadecenoic acid, vacenic acid, cis-12-octadecenoic acid, trans-12-12 Octadecenoic acid, cis-13-octadecenoic acid, trans-13-octadecenoic acid, cis-14-
Octadecenoic acid, trans-14-octadecenoic acid, cis-15-octadecenoic acid, trans-15-octadecenoic acid, cis-16-octadecenoic acid, trans-16
-Fatty acids such as octadecenoic acid. These fatty acids may be used alone or in combination of two or more. The amount of the fatty acid as the component (c) is 10 to 30% by weight, preferably 15 to 22% by weight. If it is less than 10% by weight, the solubility in water and the detergency are lowered, which is not preferable, and if it exceeds 30% by weight, a bad odor becomes strong, which is not preferable.

The component (d) used in the present invention has 16 to 16 carbon atoms.
It is a saturated fatty acid salt of 18, and specific examples thereof include fatty acids such as palmitic acid, margaric acid, and stearic acid. These fatty acids may be used alone or in combination. The amount of fatty acid of component (d) is 5-20% by weight. If it is less than 5% by weight, the detergency is lowered, which is not preferable, and if it exceeds 20% by weight, the solubility in water is lowered, which is not preferable.

The component (e) used in the present invention is a fatty acid salt having 5 to 54 carbon atoms which does not correspond to the above-mentioned components (a) to (d), and specifically, valeric acid, caproic acid, and enanthic acid. , Caprylic acid, pelargonic acid, capric acid, undecanoic acid, arachidic acid, behenic acid, lignoceric acid, cerotic acid, montanic acid, melissic acid, sorbic acid, α-eleostearic acid, β-eleostearic acid, linolenic acid And carboxylic acids such as linolenic elaidic acid, pseudoeleostearic acid, α-parinaric acid, β-parinaric acid, arachidonic acid, curpanodonic acid, and erucic acid. From the viewpoint of easy availability, fatty acids having 8 to 22 carbon atoms are particularly preferable. These fatty acids may be used alone or in combination. The amount of fatty acid of component (e) is 0 to 1
0 parts by weight. If it exceeds 10% by weight, solubility in water,
Also, it is not preferable because both the cleaning power and the cleaning power cannot be improved.

The fatty acid salt used in the present invention is an alkali metal salt such as sodium or potassium; an alkanolamine salt such as monoethanolamine, diethanolamine or triethanolamine; one or more fatty acid salt compositions selected from ammonium salts. Therefore, these alkali salts may be used alone or in combination.

As the raw material of the fatty acid salt composition of the present invention,
Fats and oils are mentioned. Specific examples of oils and fats include beef tallow,
Animal oils such as lard, bone oil, fish oil, sebum; palm oils, palm kernel oils, coconut oils, soybean oils, rice bran oils, corn oils, olive oils, cottonseed oils, rapeseed oils, honeybee seed oils, etc .; homes and restaurants , Recovered oil used for fried foods in the food industry and the like. These oils and fats are distilled,
Purification such as fractionation, steam deodorization, deoxidation, degumming, adsorbent treatment, acid treatment and partial hydrogenation treatment may be carried out before use.

Fatty acids can also be used as a raw material for the fatty acid salt composition of the present invention. Fatty acids can be obtained by hydrolysis of the above fats and oils. The fatty acid obtained by hydrolysis may be purified by distillation, rectification, fractionation, steam deodorization, adsorbent treatment, acid treatment, partial hydrogenation treatment and the like before use.

Further, as a raw material of the fatty acid salt composition of the present invention, lower alcohol and fatty acid ester may be mentioned.
The ester of lower alcohol and fatty acid can be obtained by transesterification of the above-mentioned oil and fat with lower alcohol such as methanol. The esters of lower alcohols and fatty acids may be used after purification such as distillation, rectification, fractionation, steam deodorization, adsorbent treatment, acid treatment, partial hydrogenation treatment and the like.

The peroxide value of the oil or fat, the fatty acid, or the ester of the lower alcohol and the fatty acid, which is the raw material of the fatty acid salt composition of the present invention, is preferably 7 or less, and more preferably 5 or less. When the peroxide value exceeds 7, the odor of the fatty acid salt composition becomes strong. The peroxide value in the present invention means
Standards established by Japan Oil Chemistry Association Oil and fat analysis test method 2.4.12-
The value measured by the method described in 86.

The method for producing the fatty acid salt composition of the present invention comprises the above-mentioned fats and oils, fatty acids, or esters of lower alcohols and fatty acids as the raw materials for fatty acid salts, and alkali metal hydroxides such as sodium hydroxide and potassium hydroxide; It can be easily obtained by saponification or neutralization with a carbonate such as sodium carbonate or potassium carbonate; an alkanolamine such as triethanolamine or diethanolamine, or ammonia. In addition, component (a) ~
You may manufacture each fatty acid salt of (e) separately, and may mix it to predetermined composition.

The fatty acid salt composition of the present invention can be used alone, but in order to further enhance the detergency, another surfactant other than the fatty acid salt is used so as not to impair the effects of the present invention. It can also be added to the fatty acid salt composition of the invention. Examples of such a surfactant include α-sulfo fatty acid ester, isethionate ester, alkylaryl sulfonic acid, alcohol sulfate ester, sulfate ester of alcohol ethoxylate, olefin sulfonic acid, paraffin sulfonic acid, N-acyl glutamic acid and Examples thereof include esters and salts thereof, as well as alkylbetaine and alkylsulfobetaine.
Further, to the fatty acid salt composition of the present invention, as a calcium soap dispersant for preventing soap residue formation, α-sulfofatty acid methyl ester sodium, sulfated tallow fatty acid alkanolamide sodium, tallow fatty acid amide sulfobetaine, etc. may be added. Well, C is used as a builder to prevent the formation of acidic soap, decrease the hardness component, and prevent redeposition.
MC, sodium pyrophosphate, sodium tripolyphosphate, sodium silicate, sodium carbonate, sodium borate, sodium sulfate, sodium aluminosilicate, N
TA, DTPA, oxalic acid, tartaric acid, citric acid, gluconic acid, pyromellitic acid, benzopolycarboxylic acid, polymer carboxylate, amino sulfonate and the like may be added.

The fatty acid salt composition of the present invention contains EDTA, ethane-1-hydroxy-1,1-diphosphonic acid or a compound thereof for the purpose of enhancing oxidative stability and preventing coloration, deterioration and malodor during storage. Stabilizers such as alkali metal salts, or BH
It is preferable to use an antioxidant such as T or tocopherol. The amount of these antioxidants added is preferably 5 to 500 ppm relative to the fatty acid salt, and more preferably 10 to 100 ppm.
ppm or preferred. If it is less than 5 ppm, the effect is not exhibited, and if it exceeds 500 ppm, coloring tends to occur. Further, in order to improve the detergency, enzymes such as protease, lipase and cellulase may be used, and further fluorescent bleaching agents and bleaching agents such as sodium percarbonate and sodium perborate may be used.

Furthermore, in the fatty acid salt composition of the present invention, an anti-inflammatory agent such as allantoin or dipotassium glycyrrhizinate, 2,4,4'-trichloro-2'-, in addition to pigments and fragrances, may be used depending on the purpose of use. A germicide such as hydroxydiphenyl ether, 3,4,4'-trichlorocarbanilide, benzoic acid may be added.

[0019]

The fatty acid salt composition of the present invention has good solubility in water, high detergency and no odor.
In particular, it is suitable as laundry soap, and also suitable as toilet soap and body soap. The fatty acid salt composition of the present invention can be used in the form of solid, chips, powder or liquid.

[0020]

EXAMPLES The present invention will be described in detail below with reference to examples. Example 1 50% by weight of lauric acid, 15% by weight of linoleic acid, 15% by weight of oleic acid, 10% by weight of palmitic acid, 5% by weight of stearic acid (component a = 52.6% by weight, component b = 15.%).
8% by weight, component c = 15.8% by weight, component d = 15.8
A 28% by weight aqueous sodium hydroxide solution in an equimolar amount was added to the mixed fatty acid consisting of 1% by weight and component e = 0% by weight).
After mixing with a kneading machine (PNV-5 type manufactured by Irie Shokai Co., Ltd.), the water content is dried to 15% by weight of the whole, and then compressed with an extruder (manufactured by Sato Iron Works Co., Ltd.) and then a stamping machine (Riken Seiki ( A fatty acid salt composition was obtained by molding with MP-2B type) manufactured by K.K. The results of evaluation of the composition and performance of this fatty acid are shown in Table 1.

Example 2 60% by weight lauric acid, rice bran oil fatty acid (myristic acid 0.1% by weight in fatty acids of rice bran oil, linoleic acid 37.5% by weight, oleic acid 39.5% by weight, palmitic acid 17. 8
% By weight, stearic acid 2.0% by weight, (e) fatty acid 3.1% by weight) 40% by weight to fatty acid (component a = 60% by weight, component b = 15% by weight, component c = 15.8% by weight) ,
A fatty acid salt composition was obtained in the same manner as in Example 1 using component d = 7.9% by weight and component e = 1.2% by weight). The results of evaluation of the composition and performance of this fatty acid are shown in Table 1.

Example 3 45% by weight of lauric acid, soybean oil fatty acid (0.1% by weight of myristic acid in total fatty acids, 51.3% by weight of linoleic acid,
Oleic acid 22.6% by weight, palmitic acid 14.3% by weight, stearic acid 3.1% by weight, (e) fatty acid 8.6
%) 55% by weight of fatty acid (component a = 45.1% by weight, component b = 28.2% by weight, component c = 12.4% by weight, component d = 9.6% by weight, component e = 4. 7% by weight) was used to obtain a soap composition in the same manner as in Example 1. The results of evaluation of the composition and performance of this fatty acid are shown in Table 1.

Example 4 Lauric acid 30% by weight, myristic acid 20% by weight, linoleic acid 10% by weight, oleic acid 10% by weight, palmitic acid 10% by weight, stearic acid 7% by weight (component a = 57.
5% by weight, component b = 11.5% by weight, component c = 11.5
(% By weight, component d = 19.5% by weight, component e = 0% by weight)
From the above, a soap composition was obtained in the same manner as in Example 1. The results of evaluation of the composition and performance of this fatty acid are shown in Table 1.

Example 5 Fatty acid mixture of Example 4 (component a = 57.5% by weight, component b = 11.5% by weight, component c = 11.5% by weight, component d = 19.5% by weight, component e = 0% by weight and peroxide value 0.2) were stirred in air at 100 ° C. for 3 hours at 300 rpm. The peroxide value after the heat treatment was 5.8. Next, a fatty acid salt composition was obtained from this heat-treated fatty acid mixture in the same manner as in Example 1. The evaluation results of the composition and performance of this fatty acid are shown in Table 1.

Example 6 Fatty acid salt mixture of Example 3 (component a = 45.1% by weight,
Component b = 28.2% by weight, component c = 12.4% by weight, component d = 9.6% by weight, component e = 4.7% by weight)
20 ppm of BHT was added and dissolved. The evaluation results of the performance of this composition are shown in Table 1.

Comparative Example 1 Fatty acid consisting of 20% by weight of lauric acid and 80% by weight of soybean oil fatty acid (component a = 20.1% by weight, component b = 41% by weight, component c = 18.1% by weight, component d = A fatty acid salt composition was obtained in the same manner as in Example 1 using 13.9% by weight and component e = 6.9% by weight). Table 2 shows the evaluation results of the composition and performance of this fatty acid.

Comparative Example 2 40% by weight of lauric acid, 10% by weight of linoleic acid, 40% by weight of oleic acid, 10% by weight of palmitic acid (component a = 4
0% by weight, component b = 10% by weight, component c = 40% by weight,
A fatty acid salt composition was obtained in the same manner as in Example 1, except that the component d was 10% by weight and the component e was 0% by weight. Table 2 shows the evaluation results of the composition and performance of this fatty acid.

Comparative Example 3 50% by weight of lauric acid, 20% by weight of linoleic acid, 20% by weight of oleic acid, 10% by weight of palmitic acid, 5% by weight of linolenic acid, 10% by weight of caprylic acid, 5% by weight of erucic acid.
Fatty acid consisting of (component a = 41.7% by weight, component b = 1
6.7% by weight, component c = 16.7% by weight, component d = 8.
3% by weight, component e = 16.7% by weight), and Example 1
A fatty acid salt composition was obtained in the same manner as. Table 2 shows the evaluation results of the composition and performance of this fatty acid.

Comparative Example 4 Fatty acid consisting of 50% by weight of lauric acid, 10% by weight of linoleic acid, 5% by weight of oleic acid and 2% by weight of stearic acid (component a = 74.6% by weight, component b = 14.9% by weight) ,
Component c = 7.5% by weight, component d = 3.0% by weight, component e
(0% by weight) was used to obtain a fatty acid salt composition in the same manner as in Example 1. Table 2 shows the evaluation results of the composition and performance of this fatty acid.

Comparative Example 5 Gas chromatogram analysis was carried out on the fatty acid composition of commercially available laundry soap. Further, a fatty acid salt composition of this composition (component a = 3.7% by weight, component b = 29.8% by weight, component c = 38.0% by weight, component d = 23.2% by weight, component e = 5 A fatty acid salt composition was obtained in the same manner as in Example 1. The fatty acid composition and the results of performance evaluation are shown in Table 2.

Comparative Example 6 Gas chromatogram analysis was carried out on the composition of fatty acids of commercially available toilet soap. Further, a fatty acid salt composition of this composition was obtained in the same manner as in Example 1. The fatty acid composition and the results of performance evaluation are shown in Table 2.

[0032]

[Table 1]

Note: The components used in the table are as follows. Component (a): wt% of saturated fatty acid having 12 to 14 carbon atoms Component (b); wt% of fatty acid having 18 carbon atoms and two double bonds Component (c); 1 double bond having 18 carbon atoms % By weight of fatty acid having a component (d); Weight% of saturated fatty acid having 16 to 18 carbon atoms Component (e) 5 carbon atoms not corresponding to the above (a) to (d)
~ 54% by weight of fatty acids

The test methods used and the evaluated items are as follows. <Solubility test> 700 ml of distilled water in a 1 liter beaker
And stir at 300 rpm with a stirrer with a length of 4 cm, height of 1 cm and depth of 3 mm and stirring at 300 rpm.
It was kept at 0 ° C. Diameter 7 made from molded soap composition
A cylindrical sample having a height of 7 mm and a height of 7 mm was placed in water and the time required for complete dissolution was measured. The shorter the time, the better the solubility. The solubility evaluation used in the table was evaluated in four stages as shown below. Solubility evaluation; Symbol; Dissolution time; Evaluation ×; 30 minutes or more to; Poor △: 20 minutes to less than 30 minutes; Normal ○: 10 minutes or more to less than 20 minutes; Good ◎: Less than 10 minutes; Very good

<Detergency test> Using a stain-polluted cloth, JIS
A detergency test was performed based on the method of K-3303.
The sample was 0.5 g and the test temperature was 20 ° C. The evaluation was based on the paired comparison method, and was compared with the stain removal of the damp cloth washed with the index powder laundry soap for determining the detergency. Evaluation of the paired comparison method; when it is clearly inferior ...- 2 When it is slightly inferior ...- 1 When there is almost no difference ... 0 When it is slightly superior ・ ・ +1 When it is clearly superior ・ ・ ・ ・ +2 The above evaluation In terms of points, the total of the evaluation points of 15 pieces of cloth was obtained.
The average value of the sum of the evaluation points of the three judges was evaluated in four levels as shown below. Detergency evaluation; symbol; evaluation score; evaluation ◎; 15 or more to; bad ○: 5 to less than 15; normal △; -5 to less than 5; good ×; to less than -5; very good

<Odor Evaluation Method> The odor of the fatty acid salt composition was evaluated by 20 panelists in the following three stages. Evaluation points of the panelists: ○: No offensive odor, 2 points △: Slight offensive odor, 1 point ×: Many bad odors, 0 Points From the total points, the panelists' evaluation was classified into four levels as shown below. Odor evaluation symbol; evaluation point (total of 20 people); evaluation ◎; 32-40 points; very good ○; 24-31 points; good △; 16-23 points; normal ×; 0-15 points; bad

As is clear from the above results, the fatty acid salt composition of the present invention had good solubility in water, detergency and odor.

[Table 2]

Claims (1)

[Claims] 1. The following components (a) to (e): Component (a); 40 to 7 saturated fatty acids having 12 to 14 carbon atoms.
0% by weight Component (b); 10 to 30% by weight of fatty acid having 18 carbon atoms and 2 double bonds Component (c); 10 to 30% by weight of fatty acid having 18 carbon atoms and 1 double bond (D); 5 to 20 saturated fatty acids having 16 to 18 carbon atoms
% By weight Component (e); carbon number 5 not corresponding to components (a) to (d)
A composition of a fatty acid salt consisting of 0 to 10% by weight of 54 to 54 fatty acids, the salt being one or more fatty acid salt compositions selected from alkali metal salts, alkanolamine salts and ammonium salts.