JPH07173029A - Cosmetic base - Google Patents

Abstract

PURPOSE:To obtain a cosmetic base having excellent affinity for hair and skin, improved in use feeling and finish feeling. CONSTITUTION:This cosmetic base comprises a cationic galactomannan which has a structure in which hydroxyl groups of the galactomannan is partially substituted with a group of formula I (R1 to R3 each is a 1-3 alkyl; X<-> is a monofunctional anion), 0.2-3wt.%, preferably 0.5-2.0wt.% nitrogen content and 3-500cps, preferably 10-400cps viscosity of 30% aqueous solution at 30 deg.C. This compound is obtained by reacting a galactomannan with a glycidyltrialkyl ammonium salt of formula II or a 3-halogeno-2-hydroxypropyltrialkyl ammonium of formula III (Hal is a halogen) so as to have the above nitrogen content. The cosmetic base has excellent moisture retention, makes hair and skin moist, provides hair with tough smoothness, improves luster and has these durable effects.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cosmetic base material comprising a low-viscosity cationized galactomannan which has a good affinity for hair and skin and gives a good feeling of use and finish.

[0002]

2. Description of the Related Art As a base material for cosmetics, use of natural products and their derivatives is becoming popular, and attention is focused on the use of water-soluble polymer compounds obtained by cation-modifying cellulose derivatives and starch. For example, Japanese Patent Publication No. 47-20635
The publication discloses a cellulose derivative having quaternary nitrogen introduced into shampoo and hair cosmetics. Further, Japanese Examined Patent Publication No. 60-42763 describes that cationized hydroxyalkyl starch having quaternary nitrogen introduced therein is used for shampoo, rinse, cream and the like.

[0003]

Among these cation-modified polymers, hydroxyethyl cellulose hydroxypropyltrimethylammonium chloride ether and guar gum hydroxypropyltrimethylammonium chloride ether are currently used, but they are not sufficiently satisfactory. For example, shampoos and hair cosmetics using these give a slimy feeling, a moist feeling, and softness at the time of washing and rinsing, but cause unpleasant stickiness in the process of drying hair, or undergo cation modification as it dries. It is still unsatisfactory because the polymer and the surfactant complex solidify and become stiff, and the desired feel on the dried hair is not obtained. In view of such circumstances, it is an object of the present invention to provide a cosmetic base material that gives a good feeling of use and a feeling of finish that have been difficult with the conventionally used raw materials.

[0004]

As a result of various studies to achieve the above object, the present invention has revealed that galactomannan is converted into glycidyltrialkylammonium salt or 3-halogeno-amine.
A 2-hydroxypropyltrialkylammonium salt is subjected to a molecular weight reduction treatment before, at the same time as or after the reaction so as to contain a quaternary nitrogen content of 0.2 to 3%. It was found that various cosmetics which achieve the object of the present invention can be produced by using a certain low-viscosity cationized galactomannan, and the present invention has been completed.

Galactomannan is a neutral polysaccharide in which a galactose unit is formed as a side chain in a main chain having mannose as a unit price, and it is contained in nature in large amounts mainly in legume seeds, Gua gum made from gua beans and locust bean gum made from locust beans are typical plant gums containing galactomannan as a main component.

The low-viscosity cationized galactomannan used in the present invention is a galactomannan containing a nitrogen-containing compound represented by the general formula (II) represented by the following chemical formula 2 or the general formula (III) represented by the following chemical formula 3. Rate 0.2-3
It can be produced by reacting so as to have a weight percentage.

[Chemical 2]

[Chemical 3] This cationization reaction can be performed according to a known etherification method. For example, in the presence of an alkali catalyst, the compound of the general formula (II) or (III) is added to an aqueous or alcoholic suspension of galactomannan or a dry state with a small amount of solvent, and the mixture is heated and reacted to complete the reaction. It can be carried out by post-neutralization. Examples of the compound of the general formula (II) or (III) include glycidyltrialkylammonium salt and 3-halo-2-hydroxypropyltrialkylammonium salt such as glycidyltrimethylammonium chloride, glycidyltriethylammonium chloride, glycidyltripropylammonium chloride, Glycidylethyldimethylammonium chloride, glycidyldiethylmethylammonium chloride and their corresponding bromides and iodides, 3-chloro-2-hydroxypropyltrimethylammonium chloride, 3-chloro-2-hydroxypropyltriethylammonium chloride, 3-chloro- 2-Hydroxypropyltripropylammonium chloride, 3-chloro-2-hydroxypropylethyldimethyl Nmo chloride and bromide corresponding to these, iodide and the like.

The low-viscosity cationized galactomanna used in the present invention is obtained by reducing the molecular weight of galactomannan before, simultaneously with or after cationizing galactomannan. As a method of lowering the molecular weight,
Hydrolyzing a galactomannan molecule with an acid such as hydrochloric acid, nitric acid, sulfuric acid, formic acid, acetic acid, galactomannan degrading enzyme, sodium hypochlorite, hydrogen peroxide, ammonium persulfate, potassium persulfate, and the like. Obtained by These molecular weight reduction reactions can be performed according to known methods. For example, it can be obtained by adding an acid, a decomposing enzyme, an oxidizing agent and the like to an aqueous or alcoholic suspension of galactomannan or a dry state containing a small amount of solvent, heating the mixture, and neutralizing after the reaction. An acid, a degrading enzyme, or an oxidizing agent may be used for lowering the molecular weight, but an oxidizing agent that acts even under high alkaline conditions is preferable for lowering the molecular weight simultaneously with the cationization reaction. The degree of lowering the molecular weight is such that the viscosity of a 30% aqueous solution at 30 ° C. is 3 to 500 cp.
s, preferably 10 to 400 cps.

When the content of nitrogen introduced by the cationization reaction of the low-viscosity cationized galactomannan used in the present invention is less than 0.2% by weight, the affinity for hair and skin is obtained even when it is incorporated into cosmetics. Is low, and when it exceeds 3% by weight, it gives a sticky feeling when the cosmetic is used, which is not preferable. A particularly preferable range of the nitrogen content is 0.5 to 2.0% by weight. .
Regarding the degree of lowering the molecular weight, when the viscosity of a 30% aqueous solution at 30 ° C. is less than 3 cps, a slimy feeling is insufficient when it is mixed with shampoo and the like, and when it exceeds 500 cps, unpleasant stickiness occurs in the process of drying hair. As a result, or as it dries, the complex with the surfactant solidifies and becomes stiff. The preferable range of viscosity is 10 to 400 cps.

By mixing the low-viscosity cationized galactomannan in a required amount in hair cosmetics, skin cosmetics and the like having a known formulation, the cosmetic of the present invention can be obtained. The cosmetics are not limited to those mentioned above, but particularly preferred are those which are washed off with water when using shampoo, rinse, cleansing cream and the like. Other components in the cosmetic using the cosmetic base material of the present invention are not particularly limited, and they are usual cosmetic carriers, diluents or additives [eg, various surfactants, oily substances (eg, long-chain fatty acid ester). , Hydrocarbons, etc.), hydrolyzed proteins, lanolin, lipids, fragrances, UV absorbers, hydrotropes, etc.] can be used. In addition, vitamins and other nutritionally or pharmaceutically active ingredients may be added.

The blending amount of the cosmetic base material of the present invention varies depending on the use and the like, but is preferably in the range of 0.1 to 7% by weight. If the amount is less than 0.1% by weight, the effect is not sufficiently exerted, and
If the amount exceeds 5% by weight, an unfavorable feeling may be caused.

[0011]

The present invention will be described in more detail with reference to examples, but the present invention is not limited thereto. "Parts" used in the following examples means parts by weight unless otherwise specified. Example 1 60 g of guar gum was added to a glass reactor containing 26 g of water and 100 g of methanol containing 3 g of caustic soda while stirring. Next, 40 g of glycidyl trimethyl ammonium chloride was added as an aqueous solution, 25 g of 35% hydrogen peroxide solution was further added, and the mixture was reacted at 50 ° C. for 5 hours. After completion of the reaction, 30 g of 10% hydrochloric acid aqueous solution is added and neutralized at room temperature for 1 hour. After neutralization, pour the reaction solution into a large amount of methanol,
The reaction product was precipitated and separated by filtration. The obtained precipitate was washed 3 times with 500 g of methanol each and dried under reduced pressure to obtain 103 g of a reaction product. The nitrogen content of the low viscosity cationized guar gum thus obtained was 2.4.
The 30 ° C. viscosity of the 30% by weight aqueous solution was 320 cps. (Sample number 1)

Example 2 According to the method of Example 1, low viscosity cationic guar gum and low viscosity cationic locust bean gum having different quaternary nitrogen contents and viscosities were synthesized. The results are shown in Tables 1 and 2.

[Table 1]

[Table 2]

Example 3 A shampoo having the composition (A) shown in Table 3 was prepared by using the low-viscosity cationized guar gum or the low-viscosity cationized locust bean gum obtained in Examples 1 and 2. The composition (B) was prepared for comparison. It is a composition containing no low viscosity cationized galactomannan.

[Table 3] As low viscosity cationized galactomannans, sample numbers 1, 23, 4, 5, 6, 7, 8, 9, 1 in Tables 1 and 2 were used.
16 types of 0, 11, 12, 13, 14, 15 and 16 were selected. Fifteen women were made to use each of the 17 kinds of shampoos including the composition (B) and the 16 kinds of shampoos, and the performances such as lathering, sliminess, and softness of hair after use were compared. The results are shown in Tables 4 and 5. The numerical values shown in these tables are the values obtained by subtracting the number of persons who are considered to be excellent in composition (B) from the number of persons who are considered to be excellent in composition (A).

[Table 4]

[Table 5]

From the results shown in Table 4, when the nitrogen content is 0.2% by weight or more, the shampoo performance is improved,
It can be seen that when the nitrogen content is 3% by weight or more, the stickiness after use becomes large, which is a negative factor in overall preference. (Comparison of 1, 4, 5, and 6 with respect to sample numbers 2, 3, and 7 in Table 5) Further, from the results in Table 5, the 30 ° C. viscosity of the 30% aqueous solution was 3c.
When it is lower than ps, sliminess is insufficient and 500 cps
It can be seen that the stickiness is felt when the height is higher. (9, 10, 11, 12, 13, 1 for sample numbers 8 and 16
(From the comparison of 4 and 15)

Example 4 Addition MS value of ethylene oxide of 1.6 for comparison with the low viscosity cationized galactomannan used in the present invention.
5, the composition shown in Table 3 of Example 3 using cation-modified hydroxyethyl cellulose having a nitrogen content of 1.8% by weight and a 30% aqueous solution having a 30 ° C. viscosity of 200,000 cps or more (5% of 30,000 cps). A shampoo of A) was prepared. As a result of a similar test conducted by 15 women, it was found that the base material of the present invention was superior to the cation-modified hydroxyethyl cellulose in terms of non-greasiness and combability after use.

Example 5 Sample Nos. 1 and 5 in Table 1 and Table 2 as cosmetic base materials of the present invention
Sample Nos. 10 and 14 were used to prepare cream-type hair rinses having the compositions shown in Table 6 below.

[Table 6] This hair rinse was excellent in texture during use and after use, as compared with the hair rinse containing no cosmetic base material of the present invention.

Example 6 A cleansing cream having the composition shown in Table 7 below was prepared using the same sample as in Example 5 as the cosmetic base material of the present invention.

[Table 7] This cleansing cream had better elongation and an oily feeling during use, as compared with the case where the cosmetic base of the present invention was not added.

Example 7 A neutral cream having the composition shown in Table 8 below was prepared using the same sample as in Example 5 as the cosmetic base material of the present invention.

[Table 8] This neutral cream was superior in smoothness and moisturizing feeling to the one not containing the cosmetic base material of the present invention, and the effect lasted for a long time.

[0019]

The cosmetic base material of the present invention has the following advantages. (1) Good affinity to hair and skin, good film-forming property, and excellent adsorptivity to them. (2) It has excellent moisturizing properties, moisturizes the hair and skin, gives the hair a flexible elasticity, and improves the luster of the hair.
Moreover, these effects are persistent. (3) Since it imparts smoothness to the hair and skin, the feel after use becomes smooth, and when used in shampoo, the combing of the hair is improved, the squeaky feeling is lost, and when used in creams, etc. A feeling of use and a feeling of finish can be satisfactorily imparted.

Claims (1)

[Claims] 1. A structure having a part of the hydroxyl group of galactomannan substituted with a residue represented by the general formula (I) of the following chemical formula 1, and having a nitrogen content of 0.2 to 3% by weight. Thirty
% Low-viscosity cationized galactomannan having a 30 ° C. viscosity of 3 to 500 cps aqueous solution, a cosmetic base,