JP2000026246A - Hair cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject hair cosmetic that shows excellent hair-setting properties, gives hairs good combing properties and not-greasy touch with increased durability by using a combination of fine particles of pressure-sensitive adhesive polymer with specific fine particles. SOLUTION: This hair cosmetic includes (A) fine particles of a polymer that is insoluble in water and ethers and is sticky at room temperature and (B) fine particles that is insoluble in water and ethanol and has no stickiness at room temperature. In a preferred embodiment, the component B is spherical and has larger diameter than that of the component A, for example, of 5-20 μm, and a polyamide resin powder can be cited in an embodiment. The amount of the component A is 0.1-10 wt.%, while the component B is about 0.1-10 wt.% where the weight ratio of A/B is 1/1-3/1.

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 which has excellent hair styling properties, imparts a smooth, non-sticky feel to hair, and has a long-lasting effect.

[0002]

2. Description of the Related Art Film-forming polymers are mainly used as a base for a hairdressing agent. Film-forming polymers are:
Demonstrate strong hair styling by bonding and hardening the hair,
The set hair was bundled, hands and combs did not pass, and it was hard and stiff, etc. The finish was insufficient, and re-shaping was not possible. Therefore, a hair cosmetic containing crosslinked polymer fine particles having an adhesive property without forming a film has been proposed (JP-A-64-25713). Such polymer particles are
Demonstrate moderate hair styling by sticking between hair, and
Since the hair is not hardened, the set hair has a finish that can be passed through hands and combs, and the hair can be reshaped and the hair styling power is maintained. However, since sticking between the finger and the finger still occurs, the feeling such as stickiness was not sufficiently satisfied.

[0003] On the other hand, powder is a component that imparts a non-greasy feel to hair. Since the powder itself has no tackiness, oil agents and film-forming polymers are used as binders, but the feel of the powder itself is impaired,
No good feel was obtained.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a hair cosmetic composition which is excellent in hair styling properties, imparts a smooth, non-greasy feel to hair, and has good durability.

[0005]

Means for Solving the Problems The present inventors have found that the use of a combination of an adhesive polymer fine particle and a fine powder which is insoluble in water and ethanol and has no tackiness results in excellent hair styling properties and poor hair. The present inventors have found that a hair cosmetic that gives a smooth and non-greasy feel, can reshape hair, and lasts for a long time can be obtained, and completed the present invention.

That is, the present invention relates to (A) polymer fine particles which are insoluble in water and ethanol and have tackiness at room temperature;
And (B) a hair cosmetic containing a fine powder which is insoluble in water and ethanol and has no tackiness at room temperature.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The polymer fine particles of the component (A) used in the present invention are insoluble in water and ethanol and have tackiness at room temperature. Here, "insoluble in water and ethanol" means that it does not dissolve in water and ethanol at room temperature, and "has tackiness" means that it can adhere between hairs when an appropriate amount is applied to hair. Means that the adhesive strength measured by the method is 8 g · f / cm (7.8 N / m) or more. Such polymer fine particles are described, for example, in JP-A-64-25713.
A monofunctional oil-soluble monomer having only one ethylenically unsaturated bond and having a glass transition temperature of 300 ° K or lower of a polymer; and a polyfunctional oil-soluble monomer having a plurality of ethylenically unsaturated bonds. Copolymer obtained by copolymerization,
Copolymers of the above monofunctional oil-soluble monomer and vinyl acetate are exemplified. Here, examples of the monofunctional oil-soluble monomer include those described in JP-A-64-25713. Particularly, 2-ethylhexyl acrylate, n-butyl acrylate, n-lauryl methacrylate, and acrylic acid n-Lauryl is preferred. If the polymer has a glass transition temperature of higher than 300 ° K, the resulting fine particles are insufficient in tackiness, the elastic modulus is increased, and the feel is inferior. Examples of the polyfunctional oil-soluble monomer include those described in JP-A-64-25713, and particularly preferred are divinylbenzene and ethylene glycol diacrylate. The polyfunctional oil-soluble monomer or vinyl acetate is used in an amount of 0.03 to 10 parts by weight, particularly 0.2 to 2 parts by weight, based on 100 parts by weight of the monofunctional oil-soluble monomer. It is preferable from the viewpoint of properties.
The copolymerization method is not particularly limited, and can be carried out according to a usual method, for example, a method described in JP-A-64-25713.

The particle size of the fine particles of the component (A) is not particularly limited, but is preferably from 0.1 to 10 μm, particularly preferably from 1 to 5 μm, from the viewpoint of hair styling and feeling.

The fine particles of component (A) have an adhesive force of 8
１００100 g · f / cm (7.8 to 98 N / m) and an elastic modulus of 5 × 10 ⁵ to 30 × 10 ⁵ dyn / cm ² (5 × 10 ⁴ to
30 × 10 ⁴ N / m ² ) is particularly preferred in terms of re-styling properties and feel. In the present invention, the adhesive strength and the elastic modulus were measured by the following methods.

(1) Adhesive strength: 0.5 g of a 20% by weight aqueous dispersion of polymer fine particles was placed on a 76 × 26 mm glass plate.
Apply 2 g each to one side of a 00 × 18 mm polyethylene fill and dry thoroughly. After bonding both surfaces of these coated bodies, 5 kg · f (49 N) using a hand roller
Pressure is repeatedly applied 5 times, and then TC
By M-20S type pull tester (manufactured by Shinkoh),
90 ° C at 20 ° C, 65% RH, 20mm / min pulling speed
° A peel test was performed, the stress used for peeling was measured, and the adhesive strength was determined.

(2) Modulus of elasticity: Thermal stress / strain measuring device TMA /
The measurement was performed using SS10 (manufactured by Seiko Instruments Inc.). An initial stress of 2 g was applied to a sample of polymer particles prepared in a spherical shape having a diameter of 5 mm using a probe having a bottom area of 0.01 π mm ² , and then a vibrational stress (0.02 Hz, 2
The sample was compressed in the vertical direction at ± 1 g), and the elastic modulus was measured from the change in distortion as a response.

One or more kinds of fine particles of the component (A) can be used, and 0.1 to 10% by weight, especially 1 to 5% by weight in the total composition.
It is preferable to mix it by weight because sufficient hair styling properties and good feel can be obtained.

The fine powder of the component (B) used in the present invention is insoluble in water and ethanol and has no tackiness at room temperature. Here, having no tackiness means that the tackiness measured by the above method is less than 8 g · f / cm (7.8 N / m). Examples of such fine powder include inorganic powder such as talc and metal stone, polyamide resin powder (nylon powder), polyethylene powder, polyalkyl acrylate powder, polymethyl methacrylate powder, and copolymer resin of styrene and acrylic acid. Powder, organic powder such as benzoanamine resin powder, polymethylsilsesquioxane powder,
Other examples include silicone rubber powder and carbon black. Of these, polyamide resin powder, polyethylene powder, polymethylsilsesquioxane powder, and silicone rubber powder are particularly preferred.

The shape of the fine powder of the component (B) is not particularly limited, but a spherical shape is preferred because a better feeling can be imparted. The particle size is not particularly limited, but is preferably 5 to 2 from the viewpoint that sufficient hair styling properties and good feel are obtained.
0 μm is preferred. Further, the particle size is preferably larger than the fine particles of the component (A).

One or more types of fine powder of the component (B) can be used, and 0.1 to 10% by weight, especially 1 to 1% by weight in the whole composition.
It is preferable to mix 5% by weight because sufficient hair styling properties can be obtained. The weight ratio with the component (A) is as follows:
(B) = 1: 1 to 3: 1 are preferred.

[0016] The hair cosmetic composition of the present invention further comprises components to be added to ordinary hair cosmetic compositions, such as hydrocarbon oils, glycerides, waxes, higher alcohols, higher fatty acids, polyhydric alcohols and esters. And oily components such as ethers and silicones; surfactants, thickeners, fragrances, pigments, propellants, and the like can be appropriately compounded as long as the effects of the present invention are not impaired.

The hair cosmetic of the present invention can be produced according to a usual method, and can be in any form such as cream, milk, gel, lotion, aerosol foam, aerosol spray and the like, and is suitable as a hairdressing agent and the like.

[0018]

The hair cosmetic composition of the present invention has excellent hair styling properties,
Gives the hair a smooth, non-sticky feel and can be reshaped, and its effect lasts for a long time.

[0019]

Example 1 A hair setting gel having the composition shown in Table 1 was produced by a conventional method and evaluated for hair styling, feeling, re-hair styling, and continuation of feeling. The results are shown in Table 1.

(Evaluation method) 1 g of a hair setting gel was applied to a 20 g tress with a length of 25 cm, and the following items were subjected to a sensory evaluation by 10 panelists. , 6 to 7 people ○, 4
５5 persons are indicated by Δ, and 3 persons or less are indicated by ×. (1) Hair styling: presence or absence of unity of tress. (2) Feeling: presence or absence of a non-sticky feel. (3) Re-shaping property: presence / absence of cohesion of tress after passing through 20 times. (4) Persistence of feel: presence or absence of a non-greasy feel of the tress after standing for one day.

[0021]

[Table 1]

Example 2 A hair foam having the composition shown in Table 2 was produced by a conventional method, and the same procedures as in Example 1 were performed to evaluate the hair styling, feeling, re-hair styling, and continuation of feeling. The results are shown in Table 2.

[0023]

[Table 2]

Claims (3)

[Claims] 1. A hair cosmetic composition comprising (A) polymer fine particles insoluble in water and ethanol and having tackiness at room temperature, and (B) fine powder insoluble in water and ethanol and having no tackiness at room temperature. . 2. The hair cosmetic according to claim 1, wherein the fine powder of the component (B) is spherical. 3. The hair cosmetic according to claim 1, wherein the fine powder of the component (B) has a particle size larger than the fine particles of the component (A).