JPS6020363B2 - cosmetic composition - Google Patents

Description

[Detailed description of the invention] This invention relates to cosmetic compositions.

More specifically, the present invention relates to a cosmetic composition for improving the water retention of hair, skin, and the like. In recent years, there has been a rise in awareness of grooming, and this has led to advances in grooming hair, especially among women.

For this reason, hair perms, hair coloring, hair dryers, etc. are being used more frequently, and hair damage is becoming more severe than before. Consumer surveys have also shown that hair ends become dry due to hair's water retention ability, making it difficult to brush the hair smoothly. That is, since hair perms and hair colors chemically treat hair, they act to weaken the hair by cutting the molecular bonds that make up the hair. Further use of a hair dryer or brushing physically damages the hair and reduces the water retention capacity of the hair itself. Hair is physiologically dead tissue.

Therefore, once chemically damaged hair is not restored, the ends of the hair become dry. Research has been conducted on hair cosmetics that improve the dryness of hair ends.

For example, Samurai Publication No. 40-16119 and Special Publication No. 45-19
No. 639 describes a hair cosmetic containing a quaternary ammonium salt having a di- or tri-long chain alkyl group. This hair cosmetic imparts flexibility and smoothness to the hair, makes the hair easy to comb, makes the hair supple, and furthermore prevents the hair from being electrostatically charged. However, the dryness of the ends of the hair has not yet satisfied consumer demands. Also, the patent application 1979-479
Publication No. 23 describes a hair cosmetic comprising a diol conductor and methylpolysiloxane. This hair cosmetic exhibits excellent brushing properties. However, no effect was observed on the dryness of the ends of the hair. Furthermore, JP-A-52-66638 describes a hair conditioning composition comprising polyethylene glycol, polyoxyethylene sorbitan monolaurate and silicone oil.

This composition has the effect of imparting shine and suppleness to hair. However, no effect on improving the dryness of the ends of hair has been observed. As described above, there are currently no satisfactory cosmetics available for improving the dryness of hair ends. In addition, in recent years, as people's awareness of sports has increased, opportunities to go outdoors have increased.

For this reason, skin problems caused by sun exposure and dryness of the skin and lips due to winter dryness are becoming more severe than before. Conventionally, research has been conducted on cosmetics that improve the dryness of the skin caused by the skin's water retention ability. Conventionally, low melting point oils have been applied to the skin to improve the dryness of the skin. As a result, the skin becomes sticky and the oil permeates into the skin quickly, resulting in a lack of long-lasting effects, making the product unsatisfactory. This invention was made under these circumstances, and its purpose is to improve the water retention of hair and skin, thereby reducing the dryness of the tips of the hair and the dryness of the skin. An object of the present invention is to provide a cosmetic composition that exhibits an improving effect.

That is, the present invention provides a cosmetic composition containing a mono N-long chain acyl basic amino acid lower alkyl ester salt and a mono N-long chain acyl basic amino acid salt as active ingredients.

As the basic amino acids constituting the mono N-long chain acyl basic amino acid lower alkyl ester salt and the mono N-long chain acyl basic amino acid salt that are the components of this invention, natural amino acids such as ornithine, lysine, and arginine are used. can be mentioned.

Also, synthetic amino acids such as Q,y-diaminobutyric acid can be used as well. These may be optically active or racemic. The acyl group constituting the mono N-long chain acyl basic amino acid lower alkyl ester salt is a saturated or unsaturated fatty acid residue having 8 to 22 carbon atoms.

These may be natural or synthetic. For example, single fatty acid residues such as lauroyl, myristyl, palmitoyl, and staroyl groups, as well as natural mixed fatty acid residues such as coconut oil fatty acid residues and bovine fatty acid residues, can be employed. Salts of mono-N long chain acyl basic amino acids lower alkyl esters and mono N-long chain acyl basic amino acids/acids include inorganic acid salts such as hydrochloride or sulfate, or e.g. acetate, tartaric acid. Salts, citric acid, p-toluenesulfonate, fatty acid salts, acidic amino acid salts, or organic acid salts such as pyroglutamate can be employed.

Among these, hydrochloride and L or DL-pyrrolidone carboxylate are preferred. Acidic amino acid salts are also preferred since they can be expected to have a nutritional effect on hair. Methods for synthesizing mono-N-long chain acyl basic amino acid lower alkyl ester salts from the above-mentioned raw materials are known in the art, for example as described in Japanese Patent Publication No. 42-11926 and Japanese Patent Publication No. 43
-952.

In addition, the mono-N-long chain acyl basic amino acid salt is also
-Can be synthesized in the same manner as long-chain acyl basic amino acid ester salts. Lower alkyl ester components include methyl ester, ethyl ester, and phthalate.

Lopyle ester, phthyl ester, bentyl ester,
Hexyl estel, hef. Tylester and octylester are suitable. The amount of mono-N-long chain acyl basic amino acid lower alkyl ester salt to be blended is not particularly limited, but it is preferably in the range of 0.1 to 1 value cloud amount%, with 0.5% to 0.5%. A range of 5% by weight is more preferred.

Furthermore, the amount of the mono-N-long chain acyl basic amino acid salt to be blended is not particularly limited, but is 0.00000% based on the total amount of the cosmetic composition.
Preferably in the range 1 to 5% by weight, 0.2% by weight.
More preferably, the content is in the range of 2% by weight.

In addition to the above-mentioned essential ingredients, the cosmetic of the present invention may contain the following optional ingredients within a range that does not affect the effects of the present invention. That is, optional ingredients include liquid paraffin, petrolatum,
Hydrocarbons such as solid paraffin, squalane and olefin oligomers; esters such as isopropyl myristate, isopropyl palmitate, stearyl stearate, octyldodecyl myristate, octyldodecyl oleate and 2-ethylhexanoate triglyceride;
Emulsifiers such as polyoxyethylene cetyl ether, polyoxyethylene stearate, and polyoxyethylene sorbitan monolaurate: penzalkonium chloride, cetyltrimethylammonium chloride, cetostearyltrimethylammonium chloride, stearyltrimethylammonium chloride, behenyltrimethyl chloride Cationic surfactants such as ammonium/distearyldimethylammonium chloride: N-(2-hydroxyethyl)-N-[bis(2-carpoxyethyl)aminoethyl] laurylamide disodium salt, 2-cocoyl-N-power Amphoteric surfactants such as lupoxymethyl-N-hydroxyethylimidazo IJum betaine; higher alcohol sulfates,
Anionic surfactants such as alcohol ether sulfate and Q-olefin sulfonate; higher alcohols such as lauryl alcohol, cetyl alcohol, stearyl alcohol, and behenyl alcohol; higher fatty acids such as palmitic acid, stearic acid, and behenic acid; Heat insulating agents such as ethylene glycol, propylene glycol, 1,3-butylene glycol, glycerin, and sorbitol; and other small amounts of ingredients such as bath additives, preservatives, and fragrances. The cosmetic composition of the present invention can be used in various forms such as hair rinses, hair conditioners, hair lotions, creams, milky lotions, lipsticks, and soaps.

Next, Examples and Comparative Examples of the present invention will be shown to concretely demonstrate the effects of the present invention.

Before explaining each example, the test method will be explained. Hair softness and dryness Sample 0.5 on shampoo-treated Mao Dong (59, 20 skin)
After applying Yu directly and spreading it evenly by hand, heat it at 25℃, 65℃.
It was dried in an atmosphere of %RH (relative humidity) and left overnight.

The softness and dryness of this Moto was sensory evaluated by 20 panelists. As a control, 1.0% by weight of stearyltrimethylammonium chloride, 3.0% by weight of cetostearyl alcohol. % by weight of propylene glycol 5.
A sample (Comparative Example 1) consisting of 2% by weight and water (the balance) was adopted. Evaluation is performed by comparison with a control, and the criteria are as follows. ◎: Clearly superior to the control ○: Slightly better than the control △: Equal to the control ×: Inferior to the control Combability After passing the hair bundle (7 pm, 18 pm) through a polyethylene comb, the hair was combed at a constant speed. Lower the comb at (40/min).

At this time, the maximum load (resistance value) on Mao Dong's comb was read using a tensilon meter recorder. Next, after treating this Maedong with a cosmetic composition, the maximum load applied to the column was measured in exactly the same manner as described above. The measurement is 25q
o, 65% RH. Field accuracy is defined by the following formula. Combability: Three Poisons ×・oo (%) However, C8 = Maximum load (evening) CT before treatment with the cosmetic composition
= Maximum load after treatment with cosmetic composition.

(Evening) Evaluation of combability was based on the following criteria. 50% or more: ◎ Good 40-50%: ○ Fairly good 30-40%: △ Normal 20-30%: × Slightly inferior 20% or less: × × Poor static friction coefficient Hair with a load of 40% applied to both ends One piece is attached to a friction coefficient measuring device.
ter) no fu.

The coefficient of friction was measured when the pulley was rotated at a normal rotational speed of pm, and this was taken as the coefficient of static friction.

The evaluation of the static friction coefficient was based on the following criteria. A: Static friction coefficient less than 0.12 B: Static friction coefficient 0.1, above 0.14 C: Static friction coefficient 0.14, above hair moisture Damaged hair was obtained by treating the hair with a commercially available bleaching agent. .

A 1/1 amount of the sample was applied directly to 0 hair, and was spread evenly by hand. With a bath ratio of 25:1, 40oo
After rinsing twice with tap water of
DuPont Moisture Analyzer (Type 2)
6-321A).

Hair moisture content is preferably about 11% to 13%. If the moisture content is less than this, the hair will become dry, and if it is more than this, the hair will become dull. A sample was applied to the face of a panelist with dry skin and was spread evenly by hand.

After waiting for one hour to pass in an atmosphere of 2000℃ and 40% RH, sensory evaluation was performed.

The evaluation criteria are as follows. ◎: Moist and not dry ○: Not dry ×: Dry × ×: Severely dry Examples 1 to 9 * A hair rinse agent composition having the composition (wt%) shown in Table 1 was prepared. Performance was evaluated.

Table 1 From Table 1, it can be seen that the compositions of Examples 1 to 9 have excellent performance.

On the other hand, the compositions of Comparative Examples 1 to 6, which contain only one of the two essential components of the present invention, cannot achieve the object of the present invention. Example 10 Hair treatment compositions shown in Table 2 were prepared and their performance evaluated.

Table 2 This hair treatment composition imparted excellent softness and combability to the hair, and exhibited an excellent effect on preventing dryness.

Example 11 Hair lotion compositions shown in Table 3 were prepared and their performance evaluated.

Table 3 This hair lotion composition showed excellent performance similar to Example io.

Example 12 Hair plush compositions shown in Table 4 were prepared and their performance was evaluated.

Table 4 This hair brushing agent showed excellent performance.

Example 13 A milky lotion having the composition (% by weight) shown in Table 5 was prepared and its performance was evaluated.

The results are shown in the same table. Table 5 Example 14 Creams shown in Table 6 were prepared and their performance evaluated.

Table 6 This cream showed excellent anti-difficulty effects.

Example 15 Lipsticks shown in Table 7 were prepared and their performance was evaluated.

Table 7 This lipstick showed excellent dryness prevention effects on lips.

Claims (1)

[Claims] 1. A cosmetic composition containing a mono N-long chain acyl basic amino acid lower alkyl ester salt and a mono N-long chain acyl basic amino acid salt as active ingredients.