JPS6059960B2 - Powder powder composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improved powder soap, and particularly to a powder soap composition that can prevent soap scum from forming during rinsing when used for washing.

Soaps, or alkali metal salts of fatty acids, have long been used as detergents for bathing, hand washing, and clothes washing because of their excellent detergency, mildness on the skin, and safety.

However, this soap has low solubility in cold water, and when used in hard water, it reacts with calcium ions, magnesium ions, or iron ions in it to form water-insoluble divalent metal soaps, and various It has the disadvantage of causing negative effects. For example, this water-insoluble soap is
This scum aggregates in water and becomes so-called scum, which settles on the items being washed, causing yellowing, mold growth, and the generation of strange odors.Furthermore, this scum settles as dirt on the containers being washed. , so-called "black trash." All of these adverse effects cause complaints from users, and the detergent is evaluated as a defective product. Conventionally, it has been known to use metal chelating agents and scum dispersants for the purpose of preventing scum generation or dispersing scum.

However, even with these methods, satisfactory results have not yet been obtained. For example, even if a suitable amount of a metal chelating agent (sodium ethylenediaminetetraacetate, sodium nitrilotriacetate, etc.) is added to a washing bath, it will not lose its effectiveness because it will be diluted to an almost infinite degree during rinsing. As a result, scum is generated. Scum dispersants include polyoxyethylene alkyl ether type nonionic surfactants, anionic surfactants such as acylated tauride and acylated ethoxytauride, and amphoteric surfactants such as betaine, sulfobetaine, and aminocarboxylic acids. Although some proposals have been made so far, although these methods have shown some improvement, they have not yet produced fully satisfactory results.

The present inventors have conducted intensive research to overcome the drawbacks of conventional soaps and to obtain a powder soap composition that does not generate scum during rinsing. We discovered that by blending a fatty acid ester with a specific surfactant, scum generation was prevented and the poor foaming properties in hard water, which had been a problem with soap-based detergents, were significantly improved. The present invention was made based on this.

That is, the present invention provides a soap represented by the general formula (4) (wherein R1 is an alkyl group or alkenyl group having 7 to 21 carbon atoms, and M is an alkali metal or a substituted or unsubstituted ammonium group); (B) α-sulfo fatty acid represented by the general formula (R2 in the formula is an alkyl group having 10 to 18 carbon atoms or an alkenyl group, R3 is an alkyl group having 1 to 4 carbon atoms, and M″ is an alkali metal) Ester salt, (C) general formula (in the formula, R4 has 9 to 9 carbon atoms)
17 alkyl or alkenyl groups, M″ and M″″ are alkali metals), respectively, based on the total composition weight, 30 to 70% of component (4) and (B) Ingredient 1~25% (c) Ingredient 2~
There is provided a powder soap composition characterized in that the content is within the range of 15%.

The soap represented by the general formula (1) used as the component (4) of the present invention has a total carbon number of 8 to 22, and particularly. 10 to
-18 are alkali metal salts and substituted or unsubstituted ammonium salts of higher fatty acids that are commonly used in various cleaning agent raw materials, and particularly preferred are sodium salts and potassium salts.

Examples of M in the general formula (1) include, in addition to alkali metals, ammonium groups, or substituted ammonium groups such as methylammonium, diethylammonium, and trimethylammonium groups. , by directly saponifying natural animal fats, vegetable oils, such as tallow, palm oil, coconut oil, palm kernel oil and similar substances, or by neutralizing fatty acids derived therefrom or synthetic fatty acids. manufactured by
In the composition of the present invention, the soap contains 3% per total weight of the soap.
It is used in a range of 0 to 70%, preferably 35 to 60%. If it is less than 30%, the performance as a soap powder will not be fully demonstrated, and if it exceeds 70%, it will be difficult to dissolve in water during use, making it difficult to use. Next, α of general formula (■) used as component (B)
- The sulfo fatty acid ester salt is obtained by sulfonating a fatty acid ester derived from a fatty acid having 12 to 20 carbon atoms and an alcohol having 1 to 4 carbon atoms using a conventional continuous thin-film sulfonation device or a bath-type sulfonation device. It is produced by neutralizing or sulfonating the above-mentioned fatty acid in the same manner, esterifying it with an alcohol having 1 to 4 carbon atoms, and then neutralizing it.

In this case, as the fatty acid or fatty acid ester used as a raw material, fatty acids or esters thereof having a predetermined number of carbon atoms derived from natural fats and oils (e.g., beef tallow, coconut oil, palm oil, palm kernel oil, etc.) can be used. Synthetic fatty acids with a predetermined number of carbon atoms or esters thereof derived from alcohols, olefins, etc. can be used. In addition, during the production of α-sulfo fatty acid ester salt, α-sulfo fatty acid di-salt represented by the general formula (R2 and M'' in the formula have the same meanings as above) is produced as a by-product, but the amount is If the amount is less than %, there is no particular adverse effect.

This component (B) is 1 to 25% based on the weight of the total composition.
, preferably in the range of 4 to 20%.

If this amount is less than 1%, the scum dispersion effect will be insufficient, and if it exceeds 25%, the physical properties of the powder will deteriorate significantly. Furthermore, used as component (C),
Examples of the acylated glutamate of general formula (■) include sodium coconut oil fatty acid acyl-L-glutamate, sodium beef tallow fatty acid acyl-L-glutamate, and the corresponding potassium salt.

These can be produced by acylating glutamate according to conventional methods. This (C) component is
It is necessary to use the amount in the range of 2 to 15% based on the weight of the total composition; if this amount is less than 2%, sufficient scum dispersibility cannot be obtained, and if it exceeds 15%, it cannot be used as a powder soap. Performance cannot be avoided. In addition to the above-mentioned essential ingredients, the powder soap composition of the present invention may optionally contain conventional auxiliary additives commonly used in powdered detergents and powdered soaps, such as sodium carbonate and sodium silicate. May contain builders, fillers such as sodium sulfate, anti-restaining agents such as carboxymethylcellulose (CMC) and polyethylene glycol (PEG), other stabilizers, bleaching agents, fluorescent brighteners, fragrances, pigments, etc. I'll come. The powdered soap composition of the present invention exhibits excellent effects that cannot be achieved with conventional soap detergents due to the unique interaction of the α-sulfo fatty acid ester and the acylated glutamate in the fatty acid soap.

In other words, the powder soap composition of the present invention can prevent the formation of scum during washing, and even when washing items with relatively large stains, scum may not be generated or the washing tank may be blocked by scum. It cannot be contaminated. It also shows good foaming and detergency even in hard water. Next, the present invention will be explained in more detail with reference to Examples.

In addition, the performance evaluation method of the cleaning composition shown in the following examples is as follows. Evaluation of scum dispersion in advance on a black vinyl chloride board (length 20cm x width 10”d)
) with the water surface in the center in a washer (spiral type, inverted type).
H) A solution was prepared.

The fabric to be washed is a cotton knitted skin shirt that has been worn for 3 days, and is washed in a bath ratio of 1:30 at 25°C according to the usual procedure. After dehydrating the fabric for 1 minute, wash it with water containing no composition. After rinsing for 3 minutes twice, the vinyl chloride plate was gently removed and observed to see if any scum had adhered to it. The evaluation of scum dispersibility was based on the following criteria. 0: There is almost no scum deposit.

Δ...Very slight scum deposits are seen.

×...Many scum deposits are observed. Washing was carried out under the same conditions as in the above method using a cotton knitted skin shirt that had been worn for 3 days as a foamed cloth to be washed.

After washing, the foam generated is leveled over the entire water surface, and the foam heights are measured at five locations and averaged. Example 1 35 parts by weight of sodium beef tallow fatty acid, 1 part by weight of sodium α-sulfonated beef tallow fatty acid methyl ester, 5 parts by weight of sodium beef tallow fatty acid acyl-L-glutamate, 1 part by weight of sodium silicate, 2 parts by weight of sodium carbonate, A powder soap composition was prepared by uniformly mixing 1 part of sodium sulfate and 1 part of water in a ball mill.

As a result of testing the performance of the powdered soap composition thus obtained, the scum dispersibility was 0 and the foaming property was 15. In addition, the same ingredients and amounts were used in this example except that the amount of sodium beef tallow fatty acid was 4 parts by weight, the amount of sodium beef tallow fatty acid acyl-L-glutamate was 8 parts by weight, and the amount of sodium sulfate was 2 parts by weight. The prepared powder soap composition had a scum dispersibility of 0 and a foaming property of 18.

Example 2 A powder soap composition was prepared in the same manner as in Example 1 by using a combination of various sodium fatty acids, sodium α-sulfo fatty acid ester, and acylated sodium glutamate, and adding a commonly used powder soap additive. Prepared.

Testing the performance of the powder soap composition obtained in this way,
The results are shown in the table below. In addition, for comparison, a product containing no sodium α-sulfo fatty acid ester, a product containing neither sodium α-sulfo fatty acid ester nor acylated monosodium glutamate, and a product containing increased amounts in place of the sulfo fatty acid ester salt or glutamate in Example 3 were used. The results obtained by preparing a product containing sodium sulfate as an agent and testing its performance are also listed.

Claims (1)

[Scope of Claims] 1(A) A soap represented by the general formula R_1COOM (R_1 in the formula is an alkyl group or alkenyl group having 7 to 21 carbon atoms, and M is an alkali metal or a substituted or unsubstituted ammonium group) (B) General formula ▲ Numerical formula, chemical formula, table, etc. ▼ (In the formula, R_2 is an alkyl group or alkenyl group having 10 to 18 carbon atoms, R_3 is an alkyl group having 1 to 4 carbon atoms, M'
is an alkali metal), and (C) General formula ▲ Numerical formula, chemical formula, table, etc. ▼ (R_4 in the formula is an alkyl group or alkenyl group having 9 to 17 carbon atoms, Acylated glutamate represented by M'' and M'' are alkali metals respectively, based on the total composition weight, (A) component 30 to 70% and (B) component 1
25%, and component (C) in a range of 2 to 15%.