JPH07122074B2 - Pearlescent agent - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a pearlescent agent added to various household or industrial detergents.

[Conventional technology]

Conventionally, pearly luster is often given to detergents such as hair shampoo, body shampoo, and liquid soap for the purpose of giving a sensually good impression to consumers. Therefore, the method for effectively imparting a preferable pearly luster to such a detergent is to crystallize the pearlescent agent in the final composition. It is intended to control the crystal growth by changing the above. However, in such a final composition, that is, in the method of crystallizing the pearlescent substance in the state of the product, the crystallization conditions are very limited, and there is almost no room for taking measures for improving the gloss. Recently, a method of forcibly mixing and dispersing a two-component system of monoethanolamide and ethylene glycol di higher fatty acid ester in an aqueous medium,
For example, it is disclosed in Japanese Patent Publication No. 47-804.
Also in such a method of mixing and dispersing, there is a limit in the concentration of the obtained dispersion liquid, the crystal size of the obtained pearlescent substance is uneven, and further, ethylene glycol di higher fatty acid ester There is no guarantee that a practically satisfactory product will always be obtained, since it has the drawback of being inferior in hydrolysis stability due to an alkali or the like.

[Problems to be solved by the invention]

As described above, in the conventional technique, a composition having a good feeling in use, thermal stability, and hydrolysis stability with an alkali and capable of exhibiting an excellent pearlescence could not be obtained. I got it.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention employs a means for providing a pearlescent agent comprising a saturated higher alcohol having 22 carbon atoms and a surfactant. The details will be described below.

First, the saturated higher alcohol of the present invention has a carbon number of 22 and has a purity of 80% or more, preferably 85% or more, and a carbon number of
It is desirable that the purity of 20 or more is 90% or more.
This is because the saturated higher alcohol with 22 carbons has a purity of 80.
When it is less than%, the pearlescent luster becomes poor, and even when the purity of the saturated higher alcohol having 20 or more carbon atoms is less than 90%, sufficient pearlescent luster cannot be obtained. Further, the saturated higher alcohol as in the present invention brings about very favorable results in improving the hydrolysis stability of the composition by heat and alkali.

Next, the surfactant of the present invention is an anionic or amphoteric surfactant, either alone or as a mixture of both.
Here, as the anionic surfactant, alkylbenzene sulfonate such as sodium alkylbenzene sulfonate, alkylnaphthalene sulfonate such as sodium alkylnaphthalene sulfonate, sodium lauryl sulfate or triethanolamine lauryl sulfate, etc. Alkyl sulfates having 12 to 18 carbon atoms, alkylbenzene polyoxyethylene sulfonates having 8 to 12 carbon atoms, sulfated monoglycerides such as sodium lauryl monoglyceride sulfate or lauric monoglyceride ammonium sulfate or sulfated coco monoglyceride ammonium salt, Polyoxyethylene alkyl ethers such as sodium polyoxyethylene lauryl ether sulfate or triethanolamine polyoxyethylene lauryl ether sulfate Sulfates, alkyl ether sulfates such as sodium lauryl ether sulfate or triethanolamine lauryl ether sulfate, sarcosine salts such as lauroyl sarcosine sodium or lauroyl sarcosine triethanolamine or cocoyl sarcosine sodium, N-coconut oil fatty acid acyl-L-glutamic acid Monosodium or N-coconut oil fatty acid acyl-
N- such as L-glutamic acid monotriethanolamine
Examples thereof include acyl-L-glutamic acid salts and sulfosuccinic acid salts such as dioctyl esters of salts of sulfosuccinic acid. Further, as an amphoteric surfactant, N-
Basic quaternary ammonium compounds derived from alkyl-β-iminodipropionate, N-alkyl-β-aminopropionate and 2-alkyl-substituted imidazolines, for example hydroxyethylcarboxymethylalkylimidazolinium hydroxide, In particular, derivatives such as lauric acid, myristic acid or stearic acid can be exemplified. These surfactants are not limited to those specifically exemplified. For use in the present invention, the most preferred surfactant in terms of pearlescence formation is an anion such as sodium polyoxyethylene alkyl ether sulfate, especially sodium polyoxyethylene lauryl ether sulfate (2E.O.). It is a surfactant.

Although the amount of the saturated higher alcohol and the surfactant to be blended is not particularly limited, in the usual case, 1 to 30% by weight of the saturated higher alcohol and the surfactant (active ingredient 100
%) Is preferably 5 to 50% by weight. The reason is that if the amount of the saturated higher alcohol is less than 1% by weight, the pearlescent formation is insufficient, and if the amount is more than 30% by weight, it is difficult to prepare the pearlescent agent, and the surfactant is less than 5% by weight. This is because the pearlescent formation is insufficient with a small amount and the pearlescent agent is difficult to prepare with a large amount exceeding 50% by weight. In addition, various additives such as a coloring agent, a flavoring agent, an antiseptic bactericide, an antioxidant, and an ultraviolet absorber may be blended to the extent that they do not adversely affect the pearl luster.

When blending the pearlescent agent of the present invention thus obtained in a household or industrial detergent, the blending ratio is not particularly limited, but as a standard in the usual case, 1 to 50 wt. It is desirable to set the concentration to about%. This is because if the amount is less than 1% by weight, the pearly luster is not sufficiently imparted, and if the amount exceeds 50% by weight, the detergency is deteriorated.

[Action]

In the pearlescent agent of the present invention, the saturated higher alcohol having 22 carbon atoms expresses a pearlescent effect having acid resistance, alkali resistance and fat-adding effect by using a surfactant together.

〔Example〕

Examples 1 to 7: 0.4% of saturated higher alcohols having 18 carbon atoms, 2
Alcohol (0.6% of 22, 91.7% of 22 and 1.3% of 24) (Calcol 220-85 manufactured by Kao Soap Co.) was selected, and the following 7 kinds of A to G were selected as surfactants. , And these were mixed with water in the proportions shown in the table.

A: Sodium polyoxyethylene lauryl ether sulfate (2E.O.) [70%] B: Sodium polyoxyethylene lauryl ether sulfate (3E.O.) [27%] C: Sodium lauryl sulfate [94%], D: Lauryl sulfate triethanolamine [40%], E: Lauroyl sarcosine triethanolamine [30
%], F: lauryldimethylaminoacetic acid betaine [26%], G: N-coconut oil fatty acid acyl-L-glutamic acid monotriethanolamine [30%] 3 The obtained mixed solution was heated to 80 ° C. to obtain a uniform mixture. After being made into a liquid, the mixture was cooled with stirring to precipitate pearly scaly crystals to prepare the pearlescent agent of the present invention. 8% by weight of the pearlescent agent thus prepared, 50% by weight of sodium polyoxyethylenelauryl ete sulfate (2E.O.28% solution), 3% by weight of coconut oil fatty acid diethanolamide and an appropriate amount for viscosity adjustment ( 0.5-1.0% by weight) sodium chloride and 100% by weight of purified water were added to prepare a shampoo for pearlescent evaluation. The viscosity of this shampoo (25 ° C.) was adjusted to 1500 ± 100 cp by adjusting the amount of sodium chloride. The pearl luster of the obtained shampoo was evaluated by visual judgment according to the following criteria. That is, very good (5), slightly good (4), normal (3), slightly bad (2), and significantly bad (1). It is a five-level evaluation.

Regarding the high-temperature stability, the shampoo containing the above pearlescent composition was allowed to stand at 45 ° C for 1 month, and no change in pearlescence was observed. The evaluation results of the above-mentioned pearl luster and this high-temperature stability, and a comprehensive evaluation of the two are shown together in the table by using a three-level evaluation method in which Δ is marked and Δ is what disappeared.

From the table, it was revealed that the shampoo containing the pearlescent agent of the present invention has good pearlescent properties and high temperature stability.

Example 8: Saturated higher alcohol (25% by weight) containing 25% by weight of the surfactant A used in Example 1 and 10% by weight of the same surfactant G used in Example 7 in common in Examples 1 to 7 Soluble Calcol 220-85) and heated to 80 ° C, 54% by weight of water and sodium chloride 1 separately heated to 80 ° C.
Add wt% to dissolve evenly and stir it 45
It was cooled to 0 ° C. to deposit scale-like crystals. The pearlescent agent thus obtained was evaluated based on the evaluation methods carried out in Examples 1 to 7, and as a result, the pearlescent property was good, and the pearlescent agent was allowed to stand still at 45 ° C. for 1 month. No change in pearl luster was observed at all, and both pearl luster and thermal stability were excellent. Further, as in Examples 1 to 7, a shampoo base containing 8% by weight of the above-mentioned pearlescent agent was added and mixed, and the pearly luster and the thermal stability were evaluated. As a result, all were excellent.

〔effect〕

The pearlescent agent of the present invention has excellent pearlescence and thermal stability, and further has excellent hydrolysis stability due to heat and alkali.
When added to cosmetic cleaners such as body shampoo, household cleaners such as hand washing or dishwashing, and industrial cleaners such as carshampoo, it can give a beautiful pearl luster, and even after a long time at high temperature In addition, the gloss is not abnormal, and not only can it be used in a wider pH range, but also the good feeling of use due to the saturated higher alcohol in the composition of the present invention is added, which is not seen in conventional commercial products. Many excellent effects that cannot be seen appear.
Therefore, it can be said that the significance of the present invention is extremely great.

Claims (1)

[Claims] 1. The purity of a saturated higher alcohol having 22 carbon atoms is 80%.
The above is the surface activity of the saturated higher alcohol having a carbon number of 20 or more and the purity of 90% or more, and the anionic surfactant or the amphoteric surfactant, respectively, or a mixture of both. A pearlescent agent, characterized by comprising an agent.