JPH07196457A - Hair cosmetic - Google Patents

Abstract

PURPOSE:To obtain a hair cosmetic giving a naturally finished hair and effective for protecting the hair from ultraviolet damage and keeping the effect. CONSTITUTION:This hair cosmetic having excellent effect to give naturally finished hair and protect the hair from ultraviolet rays is produced by compounding an ultraviolet absorber to a copolymer of vinylpyrrolidone and a dialkylaminomethacrylate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hair cosmetic composition, and more particularly to a hair cosmetic composition having a natural effect on hair and an effect of preventing damage to hair by ultraviolet rays.

[0002]

2. Description of the Related Art Conventionally, an ultraviolet absorber has been used to prevent damage to hair due to ultraviolet rays, but since the ultraviolet absorber hardly remains on the hair, its effect does not last,
The current situation is that the blending effect is not fully utilized.

[0003]

There is a demand for a hair cosmetic composition that can sufficiently exert the effects of an ultraviolet absorber, protect the hair from ultraviolet rays, and satisfy the finished feeling of the hair.
An object of the present invention is to provide a hair cosmetic composition that continuously protects hair from ultraviolet rays and has an excellent feeling of finish.

[0004]

Means for Solving the Problems The present inventors have conducted diligent studies to solve the above problems, and by combining a copolymer of vinylpyrrolidone and dialkylaminoalkylmethacrylate with an ultraviolet absorber. The present invention has been completed by finding that the hair is naturally finished and the hair is continuously prevented from being damaged by ultraviolet rays.

The copolymer of vinylpyrrolidone and dialkylaminoalkylmethacrylate used in the present invention can be produced by copolymerizing vinylpyrrolidone and dialkylaminoalkylmethacrylate according to a conventional method, and its polymerized form is a random copolymer. It may be any of polymerization, block copolymerization and the like. Examples of the dialkylaminoalkyl methacrylate include those having two carbon atoms of 1 to 4 carbon atoms, preferably 1 to 2 carbon atoms. For example, dimethylaminomethyl methacrylate, dimeethylaminopropyl methacrylate, or dimethylaminoethyl methacrylate can be used. The molecular weight of the copolymer is 50,000 or more, preferably 1
It is preferably at least 0,000, and when the molecular weight is less than 50,000, a strong setting force cannot be obtained, which is not suitable for use. The copolymer is 0.01 to 20% by weight based on the total amount of the cosmetic,
It is preferably blended at 0.1 to 10% by weight. If the content is less than 0.01% by weight, the effect of preventing hair damage due to ultraviolet rays will not last long, and if it exceeds 20% by weight, the finished feel of the hair will be unnatural, which is not preferable.

The ultraviolet absorber used in the present invention is 2-
Hydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid,
Benzophenone derivatives such as sodium 2-hydroxy-4-methoxybenzophenone-5-sulfonate, dihydroxydimethoxybenzophenone, sodium dihydroxydimethoxybenzophenonesulfonate, 2,4-dihydroxybenzophenone and tetrahydroxybenzophenone, paraaminobenzoic acid, ethyl paraaminobenzoate, Para-aminobenzoic acid esters such as glyceryl para-aminobenzoate, amyl para-dimethylaminobenzoate and octyl para-dimethylaminobenzoate,

Paramethoxy such as ethyl paramethoxycinnamate, isopropyl paramethoxycinnamate, octyl paramethoxycinnamate, 2-ethoxyethyl paramethoxycinnamate, sodium paramethoxycinnamate, potassium paramethoxycinnamate and glyceryl mono-2-ethylhexanoate paramethoxycinnamate. Cinnamic acid derivatives, octyl salicylate, phenyl salicylate, homomenthyl salicylate, dipropylene glycol salicylate, ethylene glycol salicylate, myristyl salicylate, salicylate esters such as methyl salicylate, urocanic acid, ethyl urocanate, methyl anthranilate, 4-tert-butyl-
4'-methoxydibenzoylmethane, 2- (2'-hydroxy-5'-methylphenyl) benzotriazole and the like can be mentioned. All of these are commercially available, and preferably paraaminobenzoic acid, octyl paradimethylaminobenzoate, octyl paramethoxycinnamate, 2-ethoxyethyl paramethoxycinnamate, and urocanic acid.

These ultraviolet absorbers may be used alone or in combination of two or more, and the amount of the ultraviolet absorber is 0.001-
The amount can be 3.0% by weight, preferably 0.01 to 1.0% by weight. If the content of the UV absorber is less than 0.001% by weight, the effect of preventing hair damage due to UV rays is not sustained, and if the amount exceeds 3.0% by weight, the effect is further improved. No improvement in sustainability is observed.

The hair cosmetic composition of the present invention is mixed with desired components,
It is produced by stirring and can be in the form of an emulsion, a foamy or gel-like hair styling agent, a hair spray, a shampoo, a hair treatment and the like. Depending on the form of the hair cosmetic, for example, triethanolamine lauryl sulfate, sodium cetyl sulfate, sodium lauryl sulfate, sodium N-stearoyl-L-glutamate,
N-myristoyl-L-sodium glutamate, N-
Sodium lauroyl-L-glutamate, sodium lauroyl sarcosine, sodium lauroyl methyl taurine, triethanolamine polyoxyethylene lauryl ether sulfate, sodium polyoxyethylene lauryl ether sulfate, sodium polyoxyethylene alkylphenyl ether phosphate, polyoxyethylene alkylphenyl ether Anionic surfactants such as triethanolamine phosphate, polyoxyethylene cetyl ether phosphate, sodium polyoxyethylene cetyl phosphate, polyoxyethylene lauryl ether phosphate, sodium polyoxyethylene lauryl ether phosphate, or 2-alkyl -N-carboxymethyl-N-hydroxyethyl imidazolinium betaine, lauryl dimethylamino acetic acid ester Inn, N, N-dimethyl -N- alkyl -N- carboxymethyl ammonium betaine,
N, N-dialkylaminoalkylene ammonium betaine, N, N, N-trialkyl-N-sulfoalkylene ammonium betaine, N, N-dialkyl-N, N
Examples thereof include amphoteric surfactants such as bis (polyoxyethylene sulfate) ammonium betaine, and the amounts of these anionic surfactant and amphoteric surfactant are each 0.5 to 3
It is about 0.0% by weight.

Examples of the cationic surfactant include cetyltrimethylammonium chloride, distearyldimethylammonium chloride, stearyldimethylbenzylammonium chloride, benzalkonium chloride, stearyltrimethylammonium chloride, lauryltrimethylammonium chloride and cetyltrimethylammonium bromide. Etc. can be exemplified,
The blending amount is about 0.01 to 3.0% by weight.

As the nonionic surfactant, polyoxyethylene octyl phenyl ether, monooleic acid polyoxyethylene glycol, stearic acid diethanolamide, polyoxyethylene hydrogenated castor oil, sorbitan monolaurate, polyoxyethylene sorbitan monopalmitate. , Hexaoxystearic acid polyoxyethylene sorbit, sucrose fatty acid ester, lipophilic glyceryl monooleate, monostearic acid polyoxyethylene glycerin coconut oil fatty acid diethanolamide, polyoxyethylene cetyl ether, polyethylene glycol monolaurate, sorbitan monooleate , Polyoxyethylene sorbitan monostearate, polyoxyethylene sorbit tetraoleate, sucrose fatty acid ester, monostea Nonionic active agents such as phosphate polyoxyethylene glycerin can be exemplified, the amount thereof 0.
It is about 01 to 5.0% by weight.

As the oil agent, dimethylpolysiloxane,
Silicone derivatives such as methylphenylsiloxane, castor oil, coconut oil, liquid lanolin, beeswax, squalane,
Examples include paraffin, oleyl alcohol, lauryl alcohol, cetanol, stearyl alcohol, isopropyl myristate, cetyl lactate, diisopropyl adipate, hexyldecyl dimethyloctanoate, decyl oleate, hexyl laurate, butyl stearate, and isopropyl palmitate. The blending amount is 0.
It is about 01 to 45.0% by weight.

Further, polyhydric alcohols such as glycerin, 1,3-butylene glycol, propylene glycol, polyethylene glycol, mannitol, sorbitol and dipropylene glycol, and others, ethanol, isopropanol, phosphoric acid, succinic acid, citric acid, diisopropanolamine , Triethanolamine, ammonia,
Acid and alkali agents such as potassium hydroxide and sodium hydroxide, liquefied petroleum gas, propellants such as dimethyl ether,
Fragrances, pigments, etc. can be appropriately added.

[0014]

EXAMPLES Next, the present invention will be described in more detail with reference to Examples and Comparative Examples. In the following examples and comparative examples, [%] means% by weight. Needless to say, the present invention is not limited to these examples. The examples and comparative examples in Table 1 were prepared, and the natural finish feeling of hair and the effect of preventing damage to hair by ultraviolet rays were evaluated by the methods described below. The evaluation method is shown.

(1) Natural finish feeling of hair About 10 g of a sample is applied to hair by 10 professional panels,
The following criteria were used to evaluate the feeling of stiffness and the feeling of sliding after coating and drying. Evaluation Criteria ⊚: All 10 persons recognized that there was no stiffness and that there was a feeling of slippage. ◯: 8 out of 10 people recognized that there was no stiffness and that there was a slippery feeling. Δ: 4 to 7 people out of 10 people recognized that there was no stiffness and that there was a slippery feeling. ×: 3 or less out of 10 people recognized that there was no stiffness and there was a slippery feeling.

(2) Persistence of hair damage prevention effect from ultraviolet rays Hair having a length of about 10 cm was immersed in the examples (and comparative examples) for 5 minutes, dried at 40 ° C. for 1 hour, and then exposed to ultraviolet rays (λ).
= 300 μm, E = 500 cal / cm2). Two hairs treated 1 hour after the start of irradiation and 8 hours after the irradiation were crossed around the respective midpoints, and a constant load (100 g) was applied to both ends of the hair using a tensile tester to bend the hair.
Then, the surface condition near the bent portion of the hair was observed using an electron microscope, and evaluated according to the following criteria. Evaluation Criteria ⊚: No difference is observed between damage after 1 hour and after 8 hours. ○: Damage after 8 hours is slightly stronger than after 1 hour. Δ: Damage after 8 hours is slightly stronger than after 1 hour. ×: Damage after 8 hours is stronger than after 1 hour.

(3) Comprehensive Evaluation Comprehensive evaluation was made according to the following criteria. Evaluation criteria ◎: Both in the above evaluation ◎ ○: Both in the above evaluation are ○ or more △: Any of the above evaluations △ ×: Any of the above evaluations ×

[0018]

[Table 1]

The results are shown in Table 1. As is clear from Table 1, in the product of the present invention, the hair is naturally finished and the effect of continuously preventing damage to the hair by ultraviolet rays is obtained.
In the comparative example, it was not possible to obtain a hair which was naturally finished and which was satisfactory in the effect of preventing damage to the hair by ultraviolet rays.

Hereinafter, Examples 6 to 12 were manufactured by a conventional method and evaluated. Example 6 Foamed hair styling ingredient (%) Water proper amount Fragrance 0.2 Copolymer of vinylpyrrolidone and dimethylamino 5.0 propyl methacrylate Ethanol 15.0 Polyoxyethylene lauryl ether sulfate 0.5 Sodium (15EO) .) Liquid isoparaffin 0.5 Oxybenzone 0.01 Liquefied petroleum gas 9.0 Dimethyl ether 1.0 Total 100.0

Example 7 Shampoo Component (%) Water Appropriate amount Perfume 0.2 Copolymer of vinylpyrrolidone and dimethylamino 5.0 propyl methacrylate Lauryl sulfate triethanolamine 10.0 POE Oleyl ether phosphate 5.0 Sodium ( 5EO) Methyl paraoxybenzoate 0.3 Polyoxyalkylene-modified silicone 2.0 Methyl anthranilate 0.1 Total 100.0

Example 8 Hair Treatment Ingredient (%) Water Appropriate Perfume 0.2 Copolymer of Vinylpyrrolidone and Dimethylamino 3.0 Propyl Methacrylate Cetyltrimethylammonium Chloride 2.0 Palm Oil Fatty Acid Diethanolamide 1.0 Polyethylene glycol 4.0 Cetanol 2.0 Cinoxate 0.05 Total 100.0

Example 9 Hair Tonic Component (%) Water Appropriate Perfume 0.1 Copolymer of Vinylpyrrolidone and Dimethylamino 3.0 Propyl Methacrylate Ethanol 40.0 Monolauryl Sulfate POE Solbit (5EO) 0.3 Adipic Acid Isopropyl 1.0 Disodium edetate 0.1 Ethyl paraaminobenzoate 0.1 Total 100.0

Example 10 Hair Cream Component (%) Water Appropriate Perfume 0.1 Copolymer of Vinylpyrrolidone and Dimethylamino 6.0 Propyl Methacrylate Squalane 40.0 Lanolin 3.0 POE Oleyl Ether (10EO) 4.0 Edetate disodium 0.1 Methyl paraoxybenzoate 0.1 Propylene glycol 2.0 Methyl anthranilate 0.1 Total 100.0

Example 11 Hair Liquid Component (%) Copolymer of Vinylpyrrolidone and Dimethylamino 2.0 Propyl Methacrylate Propylene Glycol 5.0 POE Hardened Castor Oil (60EO) 0.5 Disodium Edetate 0.05 2 -(2-Hydroxy-5-methyl 0.1 phenyl) benzotriazole Water Appropriate amount Ethanol 60.0 Perfume 0.1 Total 100.0

Example 12 Set Lotion Component (%) Copolymer of vinylpyrrolidone and dimethylamino 3.0 propyl methacrylate Glycerin 1.0 POE hydrogenated castor oil (30EO) 0.5 Ethyl urocanate 0.05 Water Appropriate amount ethanol 20.0 Fragrance 0.1 Total 100.0 It was recognized that all of these examples give a natural finish feeling to hair and are excellent in the effect of protecting hair from ultraviolet rays for a long time.

[0027]

According to the present invention, a copolymer of vinylpyrrolidone and a dialkylaminoalkyl methacrylate and an ultraviolet absorber are blended to protect hair from ultraviolet rays for a long time,
In addition, it is possible to provide an excellent hair cosmetic composition that imparts a natural finish feeling to hair.

Claims (1)

[Claims] 1. A cosmetic for hair comprising one or more of a copolymer of vinylpyrrolidone and a dialkylaminoalkylmethacrylate and an ultraviolet absorber.