JP2516406B2 - Soap composition - Google Patents

Description

TECHNICAL FIELD The present invention relates to a soap composition having excellent dispersibility of lime soap during washing and rinsing.

2. Description of the Related Art Soap (fatty acid alkali metal salt) has been used for a long time as a detergent for clothes, baths, and face-washing since it has excellent safety.

However, when soap is used in hard water, it reacts with calcium ions in hard water to produce insoluble lime soap, which causes various problems.

For example, when soap is used for washing, the lime soap deposits on clothing, causing yellowing of the cloth and unpleasant odor. Furthermore, the deposition of lime soap in the washing machine is called "black trash", which is a cause of clogging of water pipes.

Even with soap, it may cause an unpleasant odor or stain the washbasin or bathroom.

Conventionally, as such a dispersant for lime soap, ethylene oxide adduct of aliphatic higher alcohol, polyoxyethylene polyoxypropylene block copolymer, α
-Sulfo fatty acid methyl, sulfated fatty acid alkanolamide, betaine, sulfobetaine, aminocarboxylic acid type amphoteric surfactants and the like have been proposed, but these are not completely satisfactory although some improvements are observed.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention An object of the present invention is to provide a soap composition which is excellent in dispersibility of lime soap without impairing the excellent characteristics of soap.

Means and Actions for Solving the Problems As a result of intensive studies to solve the above problems, the present inventors have added a specific methyl α-D-glucopyranoside compound to soap to disperse lime soap. The present invention has been completed and the present invention has been completed.

That is, the invention has the general formula (I) [Wherein R ₁ , R ₂ , R ₃ and R ₄ represent a hydrogen atom, —CH ₂ COOM, —CH (COOM) ₂ or — (C ₂ H ₄ O) _m CH ₂ COOM, respectively, _At least one of ₁ , R ₂ , R ₃ and R ₄ is --CH ₂ C.
OOM, —CH (COOM) ₂ or — (C ₂ H ₄ O) _m CH ₂ COOM, M represents a cation residue of an alkali metal, amine or ammonia, and m is an average number of added moles of 1 to 10 Represents ] It is related with the soap composition characterized by containing the methyl (alpha) -D- glucopyranoside compound shown by these.

The soap used in the present invention is a fatty acid alkali metal salt, preferably a saturated or unsaturated fatty acid having 8 to 22 carbon atoms, and the salt is preferably a sodium salt or a potassium salt.

The methyl α-D-glucopyranoside compound blended as the lime soap dispersant in the present invention is a compound represented by the above general formula (I), and typical examples thereof include the following compounds.

(1) R ₁ , R ₂ , R ₃ and R _{4 in the} general formula (I) are all −
CH ₂ COOM (hereinafter abbreviated as tetrabasic acid type).

(2) R _{4 in the} general formula (I) is a hydrogen atom, and R ₁ , R ₂ and
R ₃ is —CH ₂ COOM (hereinafter, abbreviated as tribasic acid type).

(3) A compound in which R ₃ and R ₄ of the general formula (I) are hydrogen atoms and R ₁ and R ₂ are —CH ₂ COOM (hereinafter abbreviated as dibasic acid type).

(4) All of R ₁ , R ₂ , R ₃ and R _{4 in the} general formula (I) are-
CH (COOM) ₂ (hereinafter abbreviated as octabasic acid type).

(5) All of R ₁ , R ₂ , R ₃ and R _{4 in the} general formula (I) are −
(C ₂ H ₄ O) _m CH ₂ COOM (hereinafter referred to as EO adduct oxide).

The methyl α-D-glucopyranoside compound of the general formula (I) is preferably a sodium salt,
The -D-glucopyranoside compound can be easily produced by the method described in JP-A-63-54390.

The compounding amount of the methyl α-D-glucopyranoside compound in the composition of the present invention is not particularly limited, but is preferably 0.1 to 20% by weight with respect to the soap.

The soap composition of the present invention can also be used as a composite soap in combination with other surfactants depending on the purpose of use.
Further, the following subcomponents and additives may be added.

For example, in the case of soap for clothing, zeolite, sodium silicate, sodium bicarbonate, sodium sesquicarbonate, mirabilite, inorganic builders such as phosphate, sodium ethylenediaminetetraacetate, sodium nitriloacetate, sodium citrate, sodium malate, Organic builder such as sodium gluconate, anti-redeposition agent such as carboxymethyl cellulose, and other ingredients commonly used in laundry detergents such as enzyme and perfume can be added.

In the case of cosmetic soap, emollients such as higher alcohols, higher fatty acids and higher alcohol fatty acid esters, binders, moisturizers such as glycerides and animal and plant extracts, drugs, fragrances, pigments, and other ingredients commonly used in cosmetic soaps are required. Can be added according to

In the method for producing the soap composition of the present invention, the methyl α-D-glucopyranoside compound may be melted at the stage of neat soap of soap, may be melted in the soap base, or may be dry blended with the soap base. . Other than that, the method for clothing and makeup may be according to the method used by those skilled in the art.

Examples 1 to 5 and Comparative Examples 1 to 4 Hard water (calcium carbonate concentration 430 ppm) was added to sodium oleate to completely generate calcium oleate, and the minimum dispersant required to disperse the calcium oleate. The added amount was expressed as a percentage with respect to sodium oleate, and was defined as the lime soap dispersive power.

 The measurement results are shown in Table 1.

Example 6 Powdered soap for laundry having the following composition was prepared by a dry blending method.

Wt% ・ Mixed fatty acid (beef tallow: coconut oil = 8: 2) sodium 50 ・ Soda ash 30 ・ Glauber's salt 5 ・ Methyl α-D-glucopyranoside compound (tetrabasic acid type sodium salt) 5 ・ Water 10 Example 7 The composition below The powdered soap for laundry was prepared according to Example 6.

Wt% ・ Mixed fatty acid (beef tallow: coconut oil = 8: 2) sodium 40 ・ Zeolite 13 ・ No. 2 sodium silicate 5 ・ Soda ash 14 ・ Carboxymethyl cellulose 1 ・ Glauber's salt 16 ・ Methyl α-D-glucopyranoside compound (tribasic acid Type sodium salt) 4 -Methyl α-D-glucopyranoside compound (octabasic acid type sodium salt) 4 -Water 3 Example 8 A laundry soap powder having the following composition was prepared according to Example 6.

Wt% ・ Mixed fatty acid (beef tallow: coconut oil = 8: 2) sodium 45 ・ Palm oil fatty acid monoethanolamide 5 ・ Sodium citrate 5 ・ Soda ash 20 ・ Glauber's salt 13 ・ Methyl α-D-glucopyranoside compound (dibasic acid type) Sodium salt) 2 · Water 10 Detergent in which each methyl α-D-glucopyranoside compound is removed from the formulations of Examples 6 to 8 and Examples 6 to 8 (a portion in which the amount of methyl α-D-glucopyranoside compound is low is replenished with sodium sulfate). Was performed as Comparative Examples 5 to 7 and the amount of lime soap was examined by conducting a test under the following conditions.

[Conditions] ・ Water (hardness) …… 75ppm (CaCO ₃ ) ・ Detergent concentration …… 0.676g / ・ Contaminated cloth …… Contaminated cloth ・ Bath ratio …… 40 ・ Cleaning …… Terg-O-Tometer 100rpm × 10 Minute / Rinse ... Terg-O-Tometer 100 rpm x 2 minutes [Evaluation] The amount of lime soap generated was compared with a synthetic detergent and evaluated according to the following criteria.

・ Same degree …… ○ ・ Slightly inferior …… △ ・ Inferior …… × Table 2 shows the measurement results.

Example 9 A makeup soap having the following composition was prepared by a mechanical kneading method.

Wt% -soap matrix 88.9-cetanol 8-titanium oxide 0.1-methyl α-D-glucopyranoside compound (EO adduct oxide sodium salt) 3.0 Example 10 A medicated soap having the following composition was prepared according to Example 9.

・ Soap substrate 84.4 ・ Titanium oxide 0.1 ・ Methyl α-D-glucopyranoside compound (octabasic acid sodium salt) 10 ・ Antibacterial agent ^{* 1} 0.2 ・ Dipotassium glycyrrhizinate 0.2 ・ Fragrance 0.1 ・ Water 5 * 1: Brand name "Irgassan DP -300 ", used by Ciba Geigy Co., Ltd. Comparative soaps of Examples 9 to 10 and Examples 9 to 10 except for removing each methyl α-D-glucopyranoside compound were designated as Comparative Examples 8 to 9, and lime was prepared as follows. I checked the amount of soap.

Wet each soap and rub it on your palm 10 times,
It was thoroughly foamed with an appropriate amount of water and washed on the face. Then, the face was rinsed with warm water of 35 ° C. prepared in a basin and the amount of lime soap floating in the basin was examined.

[Evaluation] Compared with a solid detergent based on sodium lauryl sulfate,
The amount of lime soap was evaluated according to the following criteria.

・ Same degree …… ○ ・ Slightly inferior …… △ ・ Inferior …… × Table 3 shows the measurement results.

Effects of the Invention The present invention provides a soap composition excellent in lime soap dispersion.

Claims (1)

(57) [Claims] 1. A general formula (I) [Wherein R ₁ , R ₂ , R ₃ and R ₄ represent a hydrogen atom, —CH ₂ COOM, —CH (COOM) ₂ or — (C ₂ H ₄ O) _m CH ₂ COOM, respectively, _At least one of ₁ , R ₂ , R ₃ and R ₄ is --CH ₂ C.
OOM, —CH (COOM) ₂ or — (C ₂ H ₄ O) _m CH ₂ COOM, M represents a cation residue of an alkali metal, amine or ammonia, and m is an average number of added moles of 1 to 10 Represents ] The soap composition characterized by containing the methyl (alpha) -D- glucopyranoside compound shown by these.