JPH0699273B2 - Cosmetics - Google Patents

Description

TECHNICAL FIELD The present invention relates to a cosmetic containing composite hollow particles.

2. Description of the Related Art U.S. Pat. No. 4,722,943 discloses composite hollow particles in which inorganic fine particles are attached to the surface of a hollow spherical polymer. However, this U.S. Patent provides a technique for expanding microspheres in the presence of inorganic fine particles in order to prevent the particles from aggregating when expanding expandable microspheres. It is not intended to obtain itself, nor does it disclose the utility inherent in the composite hollow particles themselves.

On the other hand, the slipperiness, touch, elongation, adhesiveness, coverage of cosmetics,
Techniques for incorporating fine powder into cosmetics have long been proposed for the purpose of absorbing sweat and the like, spreading on the skin, sustaining the effect, and the like. For example, as a new technique using inorganic fine powder, Japanese Examined Patent Publication No. 61-39349 discloses a method of blending a colored porous powder obtained by impregnating a surface of a porous powder with a polyvalent metal hydroxide into a cosmetic, an organic fine powder. As a method of using
No. 181205 discloses a spherical fine powder made of cotton acetate.
Japanese Patent Laid-Open No. 184004 discloses a method using a hollow spherical polymer.

However, in the case of organic fine powder, there is often a problem in the covering property, and conversely, in the case of inorganic fine powder, there is a tendency that it is heavy and poor in elasticity, and the tactile sensation is poor. Development of fees is desired.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention An object of the present invention is to provide a cosmetic that is light and has elasticity and is excellent in concealing property, covering property, touch feeling and the like.

Means for Solving the Problems The present invention relates to a compounding material for cosmetics containing composite hollow particles in which inorganic fine powder is attached to the surface of a hollow spherical polymer, and a cosmetic containing the compounding material.

The hollow spherical polymer used in the present invention is, for example,
It can be obtained by thermally expanding the heat-expandable microcapsules obtained by the method disclosed in Japanese Patent Publication No. 42-26524, Japanese Patent Publication No. 60-21770, or the like. That is, a monomer having a polymerizable unsaturated bond is mixed with a volatile swelling agent and a polymerization initiator, and this is polymerized in an aqueous medium containing a suitable emulsifying dispersant or the like to obtain heat-expandable microcapsules. It can be obtained by thermal expansion by heating.
Thermally expandable microcapsules are described in the aforementioned U.S. Pat. No. 4,722,94.
As described in the specification No. 3, when heated together with the inorganic fine powder, the microcapsule expands with the fine powder adhering to the surface thereof, so that the composite hollow particles can be obtained in one step.

Volatile swelling agents include aliphatic hydrocarbons such as ethane, ethylene, propane, butane, isobutane, butene, isobutene, neopentane, acetylene, hexane and heptane, halogenated hydrocarbons such as trichlorofluoromethane and dichlorodifluoromethane, tetra Examples are low boiling point compounds such as alkylsilanes.

As the thermoplastic polymer that constitutes the microcapsules, acrylic acid, methacrylic acid, itaconic acid, citraconic acid,
Maleic acid, fumaric acid, vinylbenzoic acid or their esters, acrylonitrile, methacrylonitrile,
Styrene, vinyl chloride, vinylidene chloride, vinyl acetate,
Examples thereof include homo- or copolymers of monomers such as vinyl butyrate. A particularly preferred polymer is a copolymer composed of two or more monomers selected from acrylic acid, methacrylic acid or their esters, acrylonitrile, vinylidene chloride, methacrylonitrile and the like. These polymers may be crosslinked with divinylbenzene, ethylene glycol dimethacrylate, triacrylic formal and the like.

The heat-expandable microcapsules can be obtained by a method such as emulsion-polymerizing the above-mentioned monomers in an aqueous medium in the presence of the above-mentioned foaming agent, if necessary together with the crosslinking monomers. This method is described in detail in Japanese Examined Patent Publication No. Sho 42-26524.

The heat-expandable microspheres have an average particle size of 1 to 100 μm, preferably 1
It is preferable that the average particle size is 2 to 500 μm, more preferably 2 to 300 μm by heating and expanding it.
A hollow spherical polymer of m may be used. Here, the average particle size is a laser diffraction type particle size distribution measuring device (eg, JEOL Ltd.).
HEROS & RODOS) refers to the particle size at the 50% point of the cumulative distribution in the particle size distribution measured.

In order to obtain the composite hollow particles in the present invention, the heat-expandable microspheres can be produced by a method such as heating and expanding the heat-expandable microspheres in the presence of an inorganic powder. Such a method is described, for example, in US Pat. No. 4,722,943. Specifically, it can be obtained, for example, by mixing a water-containing cake or a dried product of heat-expandable microcapsules with an inorganic powder in an arbitrary ratio and heating the mixture by an appropriate method. For heating, a general contact heat transfer type or direct heating type mixing type drying device may be used. As its function, it is preferable that the temperature can be adjusted, the ability to disperse and mix the raw materials, and optionally a depressurizing device and a cooling device in order to accelerate drying.

The heating temperature is preferably about 60 to 200 ° C., more preferably about 90 to 150 ° C., although it depends on the type of the thermal expansion capsule, and is preferably the optimum expansion temperature of the thermal expansion capsule.

As the inorganic fine powder, any inorganic powder that can be used for cosmetics may be used. Specific examples include talc, sericite, kaolin, titanium oxide, mica, silica and the like. The preferred particle size of the inorganic fine powder is 0.01 to 50 in average particle size.
The particle size is 0 μm, more preferably 0.01 to 300 μm, and particularly 0.1 to 100, more preferably 1 to 70 when the average particle size of the hollow spherical polymer is 100.

The shape of the inorganic fine powder is not particularly limited, and the desired physical properties, particularly the touch and elongation when blending the composite hollow particles into cosmetics,
It may be selected in consideration of slipperiness, covering property and the like. Generally, substantially spherical inorganic particles may be used. Even if the fine powder surface has sharp-angled projections or ridges, the flexibility of the hollow spherical polymer suppresses skin irritation as compared with the case where the fine powder is used alone.

The compounding ratio of the hollow spherical polymer and the inorganic fine particles is 5:95 by weight.
-50 to 50 is preferable, and 10 to 90 to 40 to 60 is particularly preferable.

The composite hollow fine powder of the present invention may be incorporated into cosmetics in place of conventional inorganic fine powder or organic fine particles.

Hereinafter, the present invention will be described in detail with reference to examples.

Reference Example 1 (Production of Composite Hollow Particles (1)) Matsuzaka Trading Co., Ltd. Ledige Mixer Matsumoto Microsphere F-30D (Note 1) and Titanium Oxide (Note 2) in a weight ratio of 15/85 The mixture was charged, mixed for 3 minutes, and cooled at a jacket temperature of 140 ° C. for 10 minutes at a heating temperature of 90 ° C. to obtain composite hollow particles (1). The obtained composite hollow particles (1) have a true specific gravity.
0.3, apparent specific gravity 0.15, particle size was 20-40 μm. The particles were particles having both the concealing property of titanium oxide and the elasticity of hollow particles. When a titanium oxide aqueous paint was prepared using the obtained composite hollow particles, the hiding property did not decrease even when 20 vol% of titanium oxide was substituted.

Note 1: Thermally expandable microspheres containing vinylidene chloride / acrylonitrile copolymer as the shell component and having an average particle size of 15 μm and a true specific gravity of d = 1.1.

Note 2: Average particle diameter of about 0.2 μm, true specific gravity d = 4.2.

Reference Example 2 (Production of Composite Hollow Particles (2)) Matsumoto Microspheres F-30 (Note 3) / Talc (Note 4) in a Ledige mixer (continuous type) in a weight ratio of 15/85
Was continuously supplied at a ratio of 100 ° C., a jacket temperature of 140 ° C., a residence time of 20 minutes, and an outlet side product temperature of 90 ° C. for continuous thermal expansion. The resulting composite hollow particles (2) had a true specific gravity of 0.2, an apparent specific gravity of 0.1,
The average particle size was 20 μm.

It is a compressible powder with smooth talc and a load bearing capacity of 300 kg / cm ² .

Note 3: Thermally expandable microspheres with a vinylidene chloride / acrylonitrile copolymer as the shell component and an average particle size of about 15 μm and d = 1.1.

Note 4: Average particle size of about 4 μm, true specific gravity d = 2.8.

Example 1 (Face powder) Formulation A (Powder formulation) Parts by weight (%) Composite hollow particles 1 20 (54) Nylon powder 3 (8.1) Sericite 5 (13.5) Talc 4.4 (11.9) Rouge 0.2 (0.5) Yellow Iron oxide 0.1 (0.3) formulation B (fluid formulation) parts by weight (%) liquid paraffin 0.5 (1.4) glycerin-2-ethyl 1.0 (2.7) hexylate isopropyl myristate 2.5 (6.8) formulation C (fragrance) parts by weight (%) Formulated perfume 0.3 (0.8) A was mixed with a Henschel mixer and then pulverized with a pulverizer. While stirring this again with the Henschel mixer, B
Was added and stirred and mixed for 10 minutes, and C was further added and mixed for 3 minutes. When homogenized with a blower shifter and made into a face powder, soft and smooth feeling of use, lightness, and good uniformity on the skin were obtained.

Example 2 (pressed powder) Formulation A (powder formulation)% by weight Composite hollow particles (2) 3 (3.7) Talc 50 (61.7) Sericite 15 (18.5) Aluminum stearate 3.5 (4.3) Kaolin 3.7 (4.6) Valve Pattern 0.3 (0.4) Formula B (Liquid formulation)% by weight Squalane 2.0 (2.5) Glycerin-2-3.0 (3.7) Ethyl-hexylate formulation C (Flavor)% by weight% Blended flavor 0.5 (0.6) A with a ribbon blender 30 After stirring and mixing for a minute, the mixture was pulverized with a pulverizer. While stirring the crushed product with a Henschel mixer, B was added thereto and mixed for 12 minutes. Add C and 4
Stir and mix for minutes. Homogenized with a blower shifter to obtain pressed powder. A soft and light usability was obtained.

Example 3 (emulsion type foundation) Formulation A (powder formulation)% by weight Composite hollow particles (1) 1.0 (1.0) Stearic acid 2.0 (2.1) Squalane 1.5 (1.6) Stearyl alcohol 2.0 (2.1) 2-octyldodecyl 4.0 ( 4.2) Myristate Activator 5.0 (5.3) Colored Pigment Paste 18.0 (18.7) Butylparaben 0.1 (0.1) BHT 0.05 (0.05) Formula B (Liquid Formulation)% by Weight% Propylene Glycol 5.0 (5.2) Methylparaben 0.2 (0.2) Triethanol Amine 0.7 (0.7) Purified water 55.95 (58.25) Formulation C (perfume) parts by weight% blended perfume 0.5 (0.5) A is dissolved by heating at 75 ° C with stirring, uniformly dispersed and kept warm. B is heated to 80 ℃ and kept warm. The warmed B is gradually added to A to emulsify, the temperature is maintained for 10 minutes and stirred, and then the mixture is cooled with stirring to 45 ° C. At this time, C was added, and the mixture was stirred and cooled to 35 ° C. and taken out to obtain an emulsion type foundation. A soft and smooth feeling was obtained.

EFFECTS OF THE INVENTION Since the composite hollow particles used in the present invention include air therein, the weight of the particles can be reduced, and the specific gravity can be adjusted to a desired specific gravity, so that the particles can be used as various cosmetic particles. Further, since the composite hollow particles have elasticity and a compression recovery function, and have the characteristics of the inorganic particles, they are not irritating to the touch, and are excellent in slipperiness, elongation, adhesion, and covering properties. There is. In addition, it is possible to obtain a cosmetic composition which is excellent in durability of effect and absorbability of sweat and the like.

Claims (3)

[Claims] 1. A compounding material for cosmetics, which comprises composite hollow particles obtained by adhering inorganic fine powder to the surface of a hollow spherical polymer. 2. A hollow spherical polymer having an average particle diameter of 2 to 500 μm.
The average particle size of the inorganic fine powder is 0.01 to 500 μm, and the average particle size of the latter is in the range of 0.1 to 100 when the average particle size of the former is 100. Compounding material. 3. A cosmetic containing the compounding material according to claim 1 or 2.