JPS62126111A - Hair cosmetic - Google Patents

Abstract

PURPOSE:To obtain a hair cosmetic containing stably emulsified and dispersed silicone oil without lowering its lubrication effect, by combining a hydrophobic silicone oil to a di(long chain)-di(short chain) quaternary ammonium salt having a specific range of iodine value or degree of unsaturation. CONSTITUTION:The objective hair cosmetic contains (A) a quaternary ammonium salt of formula (R1 and R2 are alkyl or alkenyl; R3 and R4 are methyl, ethyl, etc.; X<-> is anion) having an iodine value of 35-100 and (B) one or more polysiloxanes selected from (a) a methylpolysiloxane of formula II (a is 3-35) having a viscosity of 1-1,000 cst at 25 deg.C, (b) a methylphenylpolysiloxane of formula III (a+b+c is 1-250) having a viscosity of 10-1,000 cst, (c) a fatty acid-modified polysiloxane of formula IV (a+b+c is 1-200; X1-X3 are 0-5; R is C9H15-C21H43) having a viscosity of 10-1,000 cst and (d) an aliphatic alcohol-modified polysiloxane of formula V (a+b+c is 1-200; X is 0-5; R is C4H9-C22H45) having a viscosity of 10-1,000 cst.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to hair cosmetics, and particularly to emulsified/dispersed hair cosmetics containing hydrophobic silicone oil.

[Conventional technology]

Hydrophobic silicone oil is widely used in various cosmetics as an oil phase component that forms a uniform thin film on the surface of the skin and hair and provides smoothness.

However, hydrophobic silicone oil generally has poor compatibility with other oil phase components, so even if it is emulsified or dispersed, hydrophobic silicone/oil particles tend to associate with each other, and the upper layer of the emulsion system It is difficult to stabilize cosmetics, such as particles floating in the water and particles settling in the lower layers.

Conventionally, various studies have already been carried out to maintain the stability of cosmetics made by emulsifying or dispersing hydrophobic silicone oil, and a typical example is one containing 18α and 18β-glycyrrhizin (% open/close ratio). 56-12530
Publication No. 5, etc.).

However, while all of these cosmetics have good stability, they have the drawback that the smoothness of the hair, which is the original purpose of incorporating hydrophobic silicone oil, is impaired.

[Problem that the invention seeks to solve]

The present invention was made under these circumstances, and provides a hair cosmetic that forms a stable emulsified/dispersed system containing hydrophobic silicone oil and has excellent properties such as smoothness. The purpose is to provide.

[Means for solving problems]

The present invention is based on the knowledge that the above problems can be solved by combining a hydrophobic silicone oil with a di-long chain di-short chain type quaternary ammonium salt having an iodine value or degree of unsaturation within a specific range. It was made by

The first component of the hair cosmetic of the present invention is represented by the following general formula (1):
It is one type or a mixture of four or more quaternary ammonium salts represented by the formula, and has an iodine value in the range of 35 to 100.

(In the formula, R4 and R2 are alkyl groups or alkenyl groups having 14 to 24 carbon atoms, R3 and R4 are methyl groups, ethyl groups, polyoxyethylene groups, or polyoxypropylene groups, and X- is represents an anion) The quaternary ammonium salt represented by the above general formula (1) is
Usually unsaturated higher fatty acids such as oleic acid, linoleic acid, linosinic acid; palm oil fatty acids.

Natural fatty acids such as soybean oil fatty acids, safflower oil fatty acids, and tall oil fatty acids; mixtures of two or more of these; or mixtures of these and beef tallow fatty acids are used as starting materials, and a reaction process well known to those skilled in the art, i.e., It can be produced by ``fatty acid → nitrification → secondary long chain aliphatic amination → short chain alkylation → quaternization''. At this time, in order to obtain a quaternary ammonium salt that ultimately maintains a high iodine value without reducing the unsaturated bond content of the raw fatty acid (
It is necessary to strictly select reaction conditions. In addition, particularly suitable starting materials are oleic acid/acid, a mixture of oleic acid and beef tallow fatty acid, and palm oil fatty acid.

R4 and R2 in general formula (I) have 14 to 14 carbon atoms.
24, preferably 16 to 22, or may have a distribution within that range. Further, R1 and R2 may be the same or different. If the number of carbon atoms in R and R2 is less than 14, for example, in the case of a quaternary ammonium salt obtained from coconut oil fatty acid as a starting material, the stability of the hydrophobic silicone oil will be poor, which is not preferable. On the other hand, R5 and R4 are a methyl group, an ethyl group, a polyoxyethylene group or a polyoxypropylene group having an average degree of polymerization of 1 to 5, and among these, a methyl group is preferred. R3 and R4 may be the same or different. X is a halogen atom or a group represented by R5504, and examples of the halogen atom include chlorine, bromine, and iodine, and R5 is an alkyl group having 1 to 3 carbon atoms.

In the present invention, it is particularly necessary that the quaternary ammonium salt has an iodine value in the range of 35 to 100, preferably 40 to 90. For example, when the iodine value is less than 35, such as quaternary ammonium salts obtained from ordinary beef tallow fatty acids, semi-facilitated or hardened beef tallow fatty acids, hydrogenated palm oil fatty acids, stearic acid, valmitic acid, behenic acid, etc.; If it exceeds 100, the stability of the hydrophobic silicone oil deteriorates, which is not preferable. However, when using a mixture of two or more types of quaternary ammonium represented by general formula (1), the iodine value of each individual quaternary ammonium salt does not necessarily have to be 35 to 100, and the iodine value of It is sufficient that the iodine content of the mixture as a whole is within the range of 35 to 100 by mixing low and high iodine.

The amount of lX quaternary ammonium salt explained above is 0.1
-5% by weight, preferably 0.5-3% by weight.

The second essential component of the present invention is a methylpolysiloxane represented by the following general formula (II) and having a viscosity of 1 to 1000 Cef-Stokes at 25°C, and a methylpolysiloxane represented by the following general formula (2)
methylphenylpolysiloxane having a viscosity of 10 to 1000 centistokes at 25°C,
From the group consisting of a fatty acid-modified polysiloxane having a viscosity of the following general formula % formula % centistokes, and an aliphatic alcohol-modified polysiloxane represented by the following general formula (V) and having a viscosity of 10 to 1000 centistokes at 25 ° C. One or more selected polysiloxanes.

The blending amount of the hydrophobic silicone oil is 0.01 to 5% by weight, preferably 0.05 to 3% by weight.

The polysiloxane that makes up the hydrophobic silicone oil is 1
Since it has a surface tension that is extremely close to or lower than the critical surface tension of hair, it spreads uniformly on the hair surface and provides a finish that is not sticky or heavy, as well as a smooth and glossy finish.

In addition to the above-mentioned essential ingredients, the hair cosmetic of the present invention contains conventional ingredients such as antifreeze agents, oils, emulsifiers, humectants, antidandruff agents, antioxidants, chelating agents, ultraviolet absorbers, fragrances, or colorants. Other components used can be optionally blended. In this case, the antifreeze agent is not particularly limited, but generally includes, for example, ethanol, isopropyl alcohol% 1,3-butylene glycol, ethylene glycol, propylene glycol, glycerin, etc. .

As the oil component, those commonly used in cosmetics can be used. Typical examples include waxes such as microcrystalline wax, paraffin wax, gay wax, beeswax, Japan wax, and sucrose wax, or mixtures thereof, liquid paraffin, α-olefin oligomers, squalane, and hydrocarbon oils such as squalene. or mixtures thereof, linear or branched saturated or unsaturated unsubstituted or hydroxy-substituted higher alcohols such as cetanol, stearyl alcohol, instearyl alcohol, hydrogenated castor butter-derived alcohol, behenyl alcohol, lanolin alcohol, or mixtures thereof.

Straight chain or branched saturated or unsaturated unsubstituted or hydroxyl fatty acids such as balmitic acid, myristic acid, oleic acid, stearic acid, hydroxystearic acid, isostearic acid, behenic acid, castor oil fatty acid, coconut oil fatty acid, tallow fatty acid, etc. Substituted higher fatty acids or mixtures thereof.

Olive oil, coconut oil, rapeseed oil, palm oil, palm kernel oil, castor oil, hydrogenated castor oil, fallen beef oil.

Beef tallow, hydrogenated beef tallow, jojoba oil, hydrogenated jojoba oil, monostearic acid glyceride, monooleic acid glyceride, civalmitic acid glyceride, trimyristate glyceride, oleyl oleate, instearyl instearate, palmityl pehate, isopropyl palmitate, Examples include esters such as stearyl acetate, valmityl behate, dihydroxystearate, and mixtures thereof. Examples of emulsifiers include those commonly used in the past, such as glycerin monostearate, sorbitan monopalmitate, polyoxyethylene cetyl ether, polyoxyethylene stearate, and polyoxyethylene sorbitan monolaurate. I can do it. As a wetting agent, hexylene glycol, polyethylene glycol 600. Examples include sodium pyroglutamate and glycerin. Anti-dandruff agents include sulfur, selenium sulfide, zinc pyridium-1-thiol-N-oxide, salicylic acid, 2,4.4'-)dichloro-2'-hydroxydiphenyl ether, 1-hydroxy-2-pyridone. Compounds, etc. can be mentioned.

Examples of the antioxidant include BHA, BHT, and γ-oryzanol.

Examples of the chelating agent include ethylenediaminetetraacetic acid, citric acid, ethane-1-hydroxy-1,1-diphosphonic acid and salts thereof. As a UV absorber.

Examples include benzophenone derivatives represented by 2-hydroxy-4-methoxybenzophenone, benzotriazole derivatives represented by 2-(2'-hydroxy-5'-methyl-phenyl)-benzotriazole, and cinnamic acid esters. .

〔Example〕

EXAMPLES Examples and comparative examples of the present invention will be shown below to explain the effects of the present invention in more detail. Furthermore, prior to each side's explanation,
The test method will be explained.

Test Method 1, Stability After storing the prepared sample at 50°C in a thermostatic chamber for one month, its appearance was observed. If the sample was in a completely uniform state, it was evaluated as ○, if it contained a partially non-uniform state, it was evaluated as Δ, and if it was separated into two layers, it was evaluated as ×.

2. Smoothness imparting effect Hair bundles (51, 20m) All samples were fully immersed in a 10TS solution, rinsed lightly, dried in an atmosphere of 25°C and 65% RH (humidity), and left to dry day and night. The smoothness of the bundle was evaluated by a multisensory panel of 20 people. The evaluation was based on 1.0% by weight of distearyldimethylammonium chloride, 0.5% by weight of dimethylpolysiloxane (30as
) and water (remainder) and a reference sample (Comparative Example 1) consisting of the following three-level evaluation.

○: Better than the standard sample Δ: Same as the standard sample ×: Inferior to the standard sample Test example 1 Quaternary polysiloxane with the same alkyl group chain length and different iodine value with the composition shown in the table below-IK Four types of hair cosmetic compositions containing ammonium salts were prepared, and their stability and smoothness imparting effects were evaluated.

The results are shown in the same table.

As is clear from the table, all of the compositions (Examples 1 to 3) using quaternary ammonium salts within the scope of the present invention have excellent properties.

Outside the scope of the present invention whose iodine number is 28? The composition using the Xquaternary ammonium salt (Comparative Example 1) is inferior in terms of stability.

Table-1 *1: Stearyldimethylammonium chloride (iodine value 28) *2: Mixture of distearyldimethylammonium chloride and dioleyldimethylammonium chloride (iodine value 3)
6) *3: Dioleyldimethylammonium chloride (iodine value 47) *4: Dioleyldimethylammonium chloride (iodine value 40) Test Example 2 Using various natural fatty acids with different degrees of unsaturation of alkyl groups and carbon number distribution as raw materials Four types of hair cosmetic compositions shown in Table 2 below were prepared using the synthesized dialkyldimethylammonium chloride, and their stability and smoothness imparting effects were evaluated. The results are shown in the same table. Furthermore, Table 3 shows the carbon number distribution of the natural fatty acids used as raw materials.

From Table-2 and Table-3, it was synthesized from natural fatty acids having a carbon number distribution of C14 to C24. Iodine value is 35~
It can be seen that when using a quaternary ammonium salt in the range of 100, the object of the present invention can be achieved. On the other hand, even if the carbon number distribution of the raw fatty acid is C14 to C24, if a quaternary ammonium salt with an iodine value exceeding 100 is used, the stability deteriorates and it is inappropriate.

・Table-2 *5: Dipalm oil alkyldimethylammonium chloride (
Iodine value 35) *6: Chlorinated fat bean oil alkyldimethylammonium (iodine value 82) *7: Safflower oil chloride alkyldimethylammonium (iodine value 92) *8: Flaxseed oil chloride alkyldimethylammonium (iodine value 115) Test example 3. Table 4 below, which is formulated with Keji's hydrophobic silicone oil.
Eight types of hair cosmetic compositions having the compositions shown below were prepared, and their stability and smoothness imparting effects were evaluated. The results are shown in the same table.

As is clear from the same table, all compositions using hydrophobic silicone oil within the scope of the present invention have good stability and an excellent lubricity imparting effect.

〔Effect of the invention〕

The hair cosmetic composition of the present invention can be applied to hair rinses, hair conditioners, hair lotions, hair treatments, and the like.

Unlike conventional products, the hair cosmetic composition of the present invention has an excellent property of being able to stably emulsify and disperse hydrophobic silicone oil without impairing the lubricating effect.

Claims (2)

[Claims] (1) (A) One or a mixture of two or more quaternary ammonium salts represented by the following general formula (I), whose iodine value is in the range of 35 to 100, and (B) The following: Represented by general formula (II), 1 at 25°C
A methylpolysiloxane having a viscosity of ~1000 centistokes, represented by the following general formula (III), and a methylphenylpolysiloxane having a viscosity of 10 to 1000 centistokes at 25°C, represented by the following general formula (IV) , a fatty acid-modified polysiloxane having a viscosity of 10 to 1000 centistokes at 25°C, and a fatty acid-modified polysiloxane having a viscosity of 10 to 10 centistokes at 25°C and represented by the following general formula (V).
A hair cosmetic comprising one or more polysiloxanes selected from the group consisting of aliphatic alcohol-modified polysiloxanes having a viscosity of 0.00 centistokes. ▲There are mathematical formulas, chemical formulas, tables, etc.▼・・・・・・( I
) (In the formula, R_1 and R_2 are alkyl groups or alkenyl groups having 14 to 24 carbon atoms, R_3 and R_4 are methyl groups, ethyl groups, polyoxyethylene groups or polyoxypropylene groups, and X^- is an anion. ions.) (CH_3)_3SiO [(CH_3)_2SiO]_
aSi(CH_3)_3・・・・・・(II) n=3~350 ▲There are mathematical formulas, chemical formulas, tables, etc.▼・・・・・・(III
) a + b + c = 1 ~ 250 ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ ...... (VI) a + b + c = 1 ~ 200 x_1, x_2, x_3 = 0 ~ 5 R = C_9H_1_5 ~ C_2_1H_4_3 ▲ Formulas,
There are chemical formulas, tables, etc.▼・・・・・・(V) a+b+c=1~200 x=0~5 R=C_4H_9~C_2_2H_4_5 (2) The blending amount of the quaternary ammonium salt is 0.1 to 5
The hair cosmetic according to claim 1, wherein the amount of the polysiloxane is 0.01 to 5% by weight.