JPS627882B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to hair cosmetics, and more particularly to hair cosmetics that improve hair feel, combability, and styling properties. Normally, hair maintains good feel, lubricity, and flexibility due to sebum secreted by sebaceous glands and appropriate moisture, and is protected from damage from physical effects such as brushing. However, in general, when hair is washed with shampoo, sebum is washed away, the hair becomes squeaky, has a poor feel, lacks lubricity, and is difficult to comb through, making the hair more likely to be damaged when brushing. Therefore, it is necessary to replenish the hair with oily components, and treatments such as rinsing or conditioner are applied after washing the hair. The oily components used in these treatment agents include higher alcohols, fatty acids and their glycerides, lanolin derivatives, liquid paraffin, and squalane, as well as those containing long-chain alkyl groups to provide flexibility and antistatic properties. Cationic surfactants are used. It is a well-known fact that these ingredients impart a conditioner effect to the hair, but there are many problems in adding these ingredients to shampoo in order to impart a conditioner effect to the hair at the same time as washing the hair. In other words, when washing hair, the concentration of surfactants is quite high, so it is difficult to attach oily ingredients to the hair surface at the same time as washing the hair, and highly lipophilic substances reduce the foaming performance of shampoo, and even softeners Cationic surfactants such as distearyldimethylammonium chloride, which are used as antistatic agents, react with anionic surfactants such as alkyl sulfate and polyoxyethylene alkyl sulfate, which are the main components of shampoo, and become inactivated. etc. In addition, many of the above-mentioned oily components generally have an unpleasant feeling such as stickiness, and many of them are not suitable for use as a hair styling product base material. For this reason, the inventors of the present invention have conducted extensive research with the aim of obtaining an oil-based ingredient that can be used not only in conditioners and conditioners, but also in shampoos and in hair styling products. It has been found that polyalkylene glycol derivatives of aliphatic amides have favorable properties as hair cosmetics. In the present invention, 10 to 150 moles of an alkylene oxide having 3 to 18 carbon atoms are added to an aliphatic amide, which is a reaction product of a fatty acid or oxyfatty acid having 8 to 34 carbon atoms, and ammonia or amines, and the total molecular weight is 0.
This is a hair cosmetic containing a polyalkylene glycol derivative obtained by adding ethylene oxide corresponding to ~80% by weight. In the present invention, examples of fatty acids having 8 to 34 carbon atoms, which are raw materials for the aliphatic amide, include capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, and lanolin fatty acids, and examples of oxyfatty acids include , ricinoleic acid,
and 9,10 dihydroxystearic acid. When the number of carbon atoms in the fatty acid is 7 or less, the hydrophobic group is too small and a soft feel due to the alkyl chain length cannot be obtained. Examples of ammonia or amines to be reacted with the above fatty acids include ammonia, monoalkylamines such as methylamine, ethylamine, n-propylamine, isopropylamine, and laurylamine; monoethanolamine, diethanolamine, monoisopropanolamine, and diisopropanol. Alkanolamines such as amines; polyamines such as ethylenediamine, tetramethylenediamine, pentamethylenediamine, stearylpropylenediamine, pentamethylenediamine, hexamethylenetetramine, and tetraethylenepentamine; among these, in the case of amides obtained from polyamines, at least It only needs to have one amide bond, and may be monoamide or polyamide. As an alkylene oxide having 3 to 18 carbon atoms,
Propylene oxide, butylene oxide, isobutylene oxide, tetrahydrofuran, carbon number 12
~18 a-olefin oxides, etc. alone or in mixtures thereof, and the amount of these added determines the lipophilicity. When the addition reaction is carried out in a conventional manner using an alkali catalyst and co-added with ethylene oxide, the manner of addition may be either random or block. The reason why the amount of lipophilic alkylene oxide is 10 to 150 moles is that if it is less than 10 moles, an oily feel cannot be obtained, and if it exceeds 150 moles, a sticky feeling will occur. The amount of ethylene oxide added to impart hydrophilicity is preferably 0 to 80% by weight of the total molecular weight; if it exceeds 80% by weight, the oily feel will be lost. The actual method of using the polyalkylene glycol derivative used in the present invention (hereinafter referred to as the product of the present invention) differs slightly depending on the product form, that is, whether it is a shampoo, a conditioner, or a hair styling product. When used as a rinse and hair conditioner component, the amount of ethylene oxide added is 0 to 80% of the total molecular weight.
Anything within the range of 30 to 80% by weight can be used, but in the case of shampoo, there are problems such as foaming, so use 30 to 80% by weight.
Additional amounts are preferred. Regarding hair styling products, there is no problem when used in small amounts as an additive, but
When adding large amounts as a base oil for hair conditioners,
Since the erodibility of celluloid used in combs, eyeglass frames, etc. is a problem, it is preferable to add 0 to 10% by weight. The product of the present invention is preferably used in an amount of 0.3 to 10% by weight when used as an additive for shampoos, conditioners, hair conditioners, and hair styling products, and preferably used in an amount of 10 to 30% by weight when used as a base oil for hair styling products. The product of this invention can be used in all kinds of hair cosmetics to give hair excellent feel and flexibility, but especially when mixed with shampoo, it has the advantage of providing both hair washing and hair conditioner effects at the same time. There is. The present invention will be explained below with reference to Examples. All percentages shown here are percentages by weight. Example 1 Make a shampoo using the following recipe, and add the table below.
The condition and finish of hair after washing were investigated when the inventive product or the comparative product shown in 1 was added, respectively, and the results are shown in Table 1. [Shampoo formulation] (Standard product) Lauryl sulfate triethanolamine
12.0% Lauryl diethanolamide 2.0% Ion-exchanged water 86.0% [Test-1] [Compatibility] Prepare shampoo with the above recipe, and add the following to the formula:
Adding 1% of the present invention product or comparative product shown in 1,
Their compatibility was observed after 2 days. × Cloudy or precipitate is observed. △ Dissolves almost transparently. 〇 Dissolves transparently. [Foaming] Collect 20 ml of a 1% aqueous solution of the shampoo to which 1% of the inventive product or comparative product was added into a 100 ml test tube,
The product was shaken vigorously 20 times, and foaming was checked after 1 minute and compared with a standard product to which the product of the present invention was not added. × Inferior △ Slightly inferior 〇 No change. [Test-2] Prepare 200 ml of a 10% aqueous solution of shampoo made by adding 1% of the product of the present invention to the standard product, and add a 15 cm long,
A bundle of human hair with a thickness of 2 cm was soaked for 3 minutes, rinsed twice with the same amount of warm water (35°C) as the sample, and air-dried.The degree of finish was evaluated using the following method. [Feel] Ten women compared and evaluated the feel of the hair strands before and after washing. × No change △ Slightly good 〇 Obviously good [Crunchy] A bundle of human hair was combed 5 times and the ease of combing was compared with that of a standard product. × Not sure △ Slightly excellent 〇 Obviously excellent [Hair styling properties] The condition of the hair bundle after the combing test was evaluated by comparing it with a standard product. × No difference △ Slightly better 〇 Clearly better

【table】

[Table] As can be seen from Table 1, the product of the present invention has good compatibility with shampoos containing anionic surfactants as the main ingredient, does not significantly suppress foaming, and also improves the feel, combability, and It gives an excellent finish effect with good hair styling properties, but the comparative product has a problem with the finish effect on the hair. The product of the present invention, which has a small amount of ethylene oxide added, has somewhat poor compatibility and foaming, but can be used as a milky shampoo without any problems. Example 2 A hair rinse was manufactured using the following formulation. Products of the present invention (Table 1) 3% Propylene glycol 10 Glycerin 10 Ion-exchanged water 77 Prepare 200 ml of a 10% hot aqueous solution (35°C) of the hair rinse formulation in Example 2, and add the formulation in Example 1 to this. The same human hair strands as in [Test-2] were soaked for 10 seconds and rinsed twice with the same amount of warm water as the sample. After drying this human hair bundle, the finish was examined in the same manner as in [Test-2] above, and it was found to be excellent in feel, combability, and hair styling properties. Example 3 A hair liquid was manufactured using the following formulation. Inventive product (Table 1) 18% Ethanol 40% Glycerin 2% Distilled water 40% Flavor and preservative Appropriate amount Stir the ingredients other than distilled water until it becomes a transparent homogeneous solution, then add distilled water and it becomes transparent. Stir until The hair liquid thus obtained was applied to hair and its feel was examined, and it was found that it was neither sticky nor corrosive to celluloid, and had a good hair styling effect.

Claims (1)

[Claims] 1 Adding 10 to 150 moles of alkylene oxide having 3 to 18 carbon atoms and 0 to 80% of the total molecular weight to an aliphatic amide, which is a reaction product of a fatty acid or oxyfatty acid having 8 to 34 carbon atoms, and ammonia or amines. A hair cosmetic containing a polyalkylene glycol derivative obtained by adding ethylene oxide corresponding to %.