JPH03244699A - Soap composition - Google Patents

Abstract

PURPOSE:To obtain a soap composition containing oleate that lathers well for a long time and hence is useful as bath soap, by incorporating a specific compound. CONSTITUTION:In a soap composition that contains oleate, elaidate is incorporated in such an amount that the weight ratio of the elaidate to the oleate is 5/95 to 70/30 in terms of sodium salt thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a soap composition with excellent foam retention.

[Prior art and its problems]

Among the general properties and performances required of skin cleansers such as bath soaps and body shampoos, foaming power, fineness of foam texture, and foam sustainability are particularly important properties that can be understood as foam performance. be.

Even in compositions containing alkaline salts of higher fatty acids, so-called soaps, as a cleaning active base, the foaming performance remains a major concern.

Conventionally, various attempts have been made to improve the foaming performance of soap compositions. Among these foaming properties, it is relatively easy to improve the foaming power and the fineness of the foam texture, for example, by combining various oils and fats as raw materials for soap to appropriate the distribution of constituent fatty acid salts in soap. This can be achieved by adding additives such as fatty acids and higher alcohols.

However, improving foam sustainability is said to be a more difficult issue among foam performance. For example, water-soluble polymers such as methylcellulose and carboxymethylcellulose, polyethylene glycol,
It is known to add polymeric polyols such as polyglycerin, but even with the addition of these polymeric compounds, there is a limit to the effect of improving foam sustainability, and the result is still unsatisfactory.

In this way, foam sustainability in soap compositions is one of the important foam properties, along with foaming properties and foam fineness, and especially in bath soaps and body shampoos, high foam sustainability is important. Although this is desired, a soap composition that can satisfy the long-lasting foam has not yet been known.

[Problem of invention]

An object of the present invention is to provide a soap composition with significantly improved foam sustainability.

[Means to solve the problem]

As a result of extensive research to solve the above problems, the present inventors discovered that the addition of elaidate significantly improves the suds persistence of soap compositions containing oleate, and the present invention I was able to complete it.

- That is, the present invention provides a soap composition containing an oleate salt, which has excellent foam sustainability and is made by incorporating an elaidate salt into the soap composition.

Elaidate, which is used as an additive for increasing the suds persistence of soap compositions in the present invention, is a fatty acid salt with 18 carbon atoms, and is an oleate salt having a trans structure containing one double bond. It is an isomer. Examples of the elaidate salts include sodium salts, alkali metal salts such as potassium salts, and triethanolamine salts.

The amount of elaidate added is determined according to the amount of oleate contained in the soap composition, and the weight ratio A/B of elaidate (A) and oleate (B) is such that sodium In terms of salt, 5/90 to 70/30, preferably 1
It is preferable to mix it in a range of 0/90 to 50150.

If the amount of elaidate salt is less than the above range, the effect of improving foam sustainability will not be sufficient, while if it is more than the above range, the foaming properties will tend to be impaired, which is not preferable.

Methods for blending elaidate into soap compositions include adding and mixing elaidate directly to the raw soap base, as well as adding and mixing elaidate to the soap base as a raw material.
There is a method of adding an elaidic acid mixture obtained by partially hydrogenating an acid or ester containing elaidic acid or a linoleic acid group, or a salt or ester thereof. In the method of adding elaidic acid or its ester during the production of soap base materials, the added elaidic acid or elaidic acid ester reacts with the alkali during soap base production and is converted to elaidate salt, resulting in a soap containing elaidate salt. A base is obtained.

Soap bases can be manufactured according to conventionally known methods. For example, animal fats and oils such as beef tallow, pig intestines, whale fat, and fish fat; vegetable oils and fats such as coconut oil, palm oil, palm kernel oil, soybean oil, olive oil, and cottonseed oil, etc., either singly or in mixtures; The amount of oleate contained in the soap base is usually about 20 to 40% by weight. be.

In the soap composition of the present invention, various conventionally known auxiliary ingredients can be blended together with the elaidate salt. Such components include perfumes, EDTA, and stabilizers such as ethane-1-hydroxy-1,1-diphosphonic acid or alkali metal salts thereof. Other surfactants apart from the soap base can also be added to the compositions of the present invention in order to further enhance the cleaning power. Examples of such surfactants include α-sulfo fatty acid esters, isethionate esters, and alkylarylsulfonic acids.

Examples include alcohol sulfate esters, sulfate esters of alcohol ethoxylates, olefin sulfonic acids, paraffin sulfonic acids, N-acylglutamic acids, esters and salts thereof, alkyl betaines, alkyl sulfobetaines, and the like.

Furthermore, in order to adjust the effect of residual oil on the skin, generally known superfatting agents and various skin protective agents can be added. Specific examples thereof include hydrocarbons such as squalene, squalane, olefin oligomer wax, vaseline, and mineral oil; fatty acids such as stearic acid, isostearic acid, oleic acid, ricinoleic acid, valmitic acid, myristic acid, and behenic acid; various glycerides, Fatty acid esters such as sugar ester, lanolin, isopropyl myristate, isopropyl palmitate, and isobutyl stearate; Fatty alcohols such as cetyl alcohol, stearyl alcohol, and oleyl alcohol; Polyols such as glycerin, polyethylene glycol, and polypropylene glycol; Alcohols and fatty acids silicones such as dimethyl silicone; various other proteins and protein derivatives; and vitamins.

Furthermore, the soap composition of the present invention may contain EDTA, EHDP, 8, in addition to pigments and fragrances, depending on the purpose of use.
1 (Stabilizers such as T, anti-inflammatory agents such as allantoin and dipotassium glycyrrhizinate, 2,4.4'-)-lichloro-2'-hydroxydiphenyl ether, 3,4.4'
Bactericidal agents such as trichlorocarbanilide (TCC), benzoic acid, etc. can be added.

As a method for manufacturing a soap composition using the above-mentioned components, a conventionally known method can be adopted. Usually, the necessary components are mixed uniformly into a soap base with a mixer, and then extruded using a roll or plotter. Method of stamping, or soap, sugar.

After blending polyhydric alcohol, ethanol, and water, adding each ingredient and heating it to 70 to 80℃ to make a uniform transparent soap liquid, pour it into an assimilation frame, cool it, solidify it, cut it, and dry it. A method such as stamping is adopted.

〔Effect of the invention〕

By containing elaidate, the soap composition of the present invention has a significantly improved foam sustaining effect compared to conventional soap compositions, and is particularly suitable as a bath soap or body shampoo. It is something. The soap composition of the present invention can be applied not only in solid form but also in powder form or liquid form.

〔Example〕

EXAMPLES Examples of the present invention will be shown below to explain the effects of the present invention more specifically. First, the evaluation method adopted in the example will be explained.

(Sustainability of foam) The test product was subjected to a sensory test by hand washing by 20 panelists, and the test results were compared with the results for a single product (standard product) that does not contain elaidate and evaluated based on the first standard. .

3: Foam sustainability is very good compared to the standard product 2: Foam sustainability is slightly better compared to the standard product 1: Foam sustainability is unchanged compared to the standard product 0: 1% Based on the above results of poor foam persistence compared to a similar product, the average evaluation score of 20 people was determined, and the evaluation was further based on the following criteria.

0: 2.5 or more O: 2 or more and less than 2.5 Δ: 1 or more and less than 2 ×: less than 1 Example 1 Mixture obtained by reacting a mixture of 80 parts by weight of beef tallow and 20 parts by weight of coconut oil with sodium hydroxide Fatty acid sodium salt was used as the soap base, and sodium elaidate was blended with it in the proportions shown in Table 1.Additionally, as auxiliary ingredients, 1.1% by weight of fragrance, 0.2% by weight of EDTA, and titanium dioxide were added. A soap composition was obtained by blending at a ratio of 0.2% by weight.

Next, this composition was evaluated for its foam persistence, and the results are shown in Table 1.

Table 1 Example 2 Mixed fatty acid sodium obtained by reacting a mixture of 60 parts by weight of beef tallow and 40 parts by weight of coconut oil with sodium hydroxide was used as a soap base, and sodium elaidate was added to it in the proportions shown in Table 2. In addition, 1.3% by weight of fragrance, ED
A soap composition was obtained by blending TA in a proportion of 0.2% by weight and titanium dioxide in a proportion of 0.2% by weight.

This soap composition was evaluated for its foam sustainability,
The results are shown in Table-2.

Table 2 Example 3 A mixed fatty acid sodium salt obtained by reacting a mixture of 50 parts by weight of palm oil and 50 parts by weight of coconut oil with sodium hydroxide was used as a soap base, and 6 parts by weight of potassium elaidate was added to 100 parts by weight of the soap base. part was blended. The weight ratio of elaidate to oleate in this formulation was 18/82 in terms of sodium salt.

Next, 92.25 parts by weight of the above blend was added with 2,4.4'-
Trichloro-2-hydroxydiphenyl ether 0.2
parts by weight, allantoin 0.2 parts by weight, polyethylene glycol (molecular weight 400) 1.0 parts by weight, palmitic acid 5.0 parts by weight, EHDPo, 3 parts by weight, EDTAo, 0
A soap composition was obtained by blending 5 parts by weight and 1.0 parts by weight of perfume. It was confirmed that this product exhibited good foam persistence.

Example 4 As a soap base, a mixture of various sodium fatty acids containing 7$ by weight of sodium elaidate was used. The weight ratio of sodium elaidate and sodium oleate contained in this mixture was 7/22. In addition, the weight ratio of fatty acid components in this mixture is as follows in terms of sodium salt:
Fatty acid with 12 carbons: 29% by weight, fatty acid with 14 carbons: 10% by weight, fatty acid with 16 carbons: 28% by weight, fatty acid with 18 carbons: 233% by weight 2 (Elaidic acid nia weight 2)
, oleic acid: 22% by weight, others = 4% by weight).

88.5 parts by weight of the soap base containing the above elaidate salt, 1.0 parts by weight of carboxymethylcellulose, 2.0 parts by weight of glycerin, 5.0 parts by weight of palmitic acid, 2.0 parts by weight of coconut oil fatty acid, EHDPo. , 3 parts by weight, EDTA
A soap composition was obtained by blending 1.2 parts by weight of perfume and 1.2 parts by weight of perfume. It was confirmed that this product had excellent foam retention.

Example 5 A higher fatty acid soap base consisting of a mixture of potassium coconut oil fatty acid, potassium myristate, potassium oleate, and potassium elaidate (weight ratio = 5:5:10:5) and a coconut oil fatty acid gel Tanolamide 1.0
% by weight, propylene glycol 5.0% by weight, edetate-4Na O, 1% by weight, 2,4.4'-trichloro-
A body shampoo composition consisting of 0.2% by weight of 2-hydroxydiphenyl ether, 1.0% by weight of fragrance, and the remainder purified water was prepared and its foam performance was evaluated. It was confirmed that

Claims (2)

[Claims] (1) In a soap composition containing an oleate salt,
A soap composition with excellent long-lasting foam, which contains an elaidate salt. (2) Claim 1 wherein the weight ratio of elaidate to oleate is 5/95 to 70/30 in terms of sodium salt.
soap composition.