JPH0699276B2 - Scrub cosmetics - Google Patents

Description

The present invention relates to a scrub cosmetic, and more particularly to a scrub cosmetic which can be applied to the skin to obtain a cleansing effect and a massage effect at the same time, and can be expected to promote blood circulation and absorb and remove skin wastes. is there.

Heretofore, many attempts have been made to improve the cleansing effect and the massage effect by blending a granular substance into a scrub cosmetic such as a cleansing agent and a massage agent.
For example, crushed seeds such as walnuts and apricots, and those in which a synthetic resin powder such as polyethylene is mixed in a scrub cosmetic have already been known.

However, there are many drawbacks that cannot be solved by these conventional methods. That is, for example, when crushed seeds are used, the obtained granules are generally indefinite and often have a sharp split surface, and it is difficult to say that it is preferable for safety such as damaging the skin during scrubbing. . On the other hand, in the case of using synthetic resin powder, since the synthetic resin can be processed into various shapes, for example, spherical powder has a rolling effect and reduces the risk of damaging the skin, but this is also essential. Since the particles are hard particles that are not deformed or broken, the particles having a small particle size have a remarkable polishing action, and therefore the amount used is limited. In addition,
Even if a very large particle size is used, considerable experience from actual use is required in order for the user to acquire an effective scrub effect that does not burden the skin. Subcutaneous tissue damage and inflammation were uninterrupted.

Therefore, in the present invention, in view of the conventional problems as described above,
It is an object of the present invention to provide a cosmetic composition that can be easily used by anyone and can obtain a sufficient scrub effect without imposing a burden on the skin. As a result of intensive studies conducted by the present inventors in accordance with the above-mentioned object, it can be confirmed by fingertips or eyes during scrubbing operation, and when a force of a certain amount or more is applied, it collapses and releases an oily component having a lubricating action in a specific particle size range. The present inventors have found that the soft spherical resin capsules of (1) are mixed in a cosmetic material to satisfy the above object, and have completed the present invention.

That is, the present invention is a scrub cosmetic compounding a compression-disintegrating soft resin capsule encapsulating an oily component, which is at least 50% by weight of the total amount of the compression-disintegrating soft resin capsule.
The present invention relates to a scrub cosmetic, which has a particle size of 100 to 400 μm.

Hereinafter, the present invention will be described in detail.

The compression-disintegrating soft spherical resin capsule (hereinafter simply referred to as a resin capsule) applied to the present invention means that the resin film of the capsule is destroyed when the pressure of a finger or the like is excessively applied during the scrub operation, and the encapsulated oiliness It is designed to release the ingredients and is at least 50% by weight of the total capsules.
The above particle size is selected in the range of 100 to 400 μm.
If the amount of resin capsules having a particle size of 100 to 400 μm is less than 50% by weight of the total amount of the capsules, a negative effect is strongly exhibited, such as a feeling of foreign matter or a pain, or an excessive damage to the skin. This will be described in detail below.

If the particle size of the resin capsules is smaller than 100 μm, it becomes difficult to confirm the disintegration by visual observation or touch, and it also becomes difficult to apply it to a massage material because it also has a polishing effect, but the cleansing effect is increased. Since it also has a function of making the content of 100 μm or less, the content of up to 50% by weight, preferably 35% by weight of the total weight of the resin capsule is acceptable. On the other hand, if the particle size exceeds 400 μm, the foreign body sensation is enhanced, and a painful sensation occurs when each resin capsule touches the skin. In addition, during scrubbing, a gap is created between the fingertip and the skin, and the scrubbing effect is diminished. From these points, it is desirable that those having a particle size of more than 400 μm should be kept to 10% by weight, preferably 5% by weight or less of the total weight of the resin capsule. As a result of comprehensive research on the above, it was found that the resin capsules provide suitable scrubbing effect and massage effect when the particle size of at least 50% by weight of the total amount of the capsules is 100 to 400 μm.

The spherical shape in the resin capsule naturally includes an elliptical shape and other similar spherical shapes in addition to a true spherical shape.

Next, the compounding amount of the resin capsule containing the oil component in the scrub cosmetic composition is in the range of 0.5 to 15% by weight, preferably 1 to 10% by weight. 0.5% by weight
If it is less, the enhancement of the scrubbing effect cannot be expected. On the contrary, if it exceeds 15% by weight, the abrasive effect on the skin due to the increase in the number of resin capsules becomes excessive, so it should be avoided.

Further, the amount of the oily component encapsulated in the resin capsule is 30 to 80% by weight, preferably 40 to 70% by weight based on the entire resin capsule.
A weight% range is selected. When the encapsulation rate of the oily component is less than 30% by weight, the film strength of the resin capsule is increased and it is difficult to disintegrate, and it takes time to subdivide the film substance after disintegration into a size that does not give a strange feeling to the skin. In short, this causes an excessive scrubbing effect and adversely affects the skin. On the other hand, if it exceeds 80% by weight, the film strength will be weak, and the resin capsule will disintegrate prematurely when applied to the skin, making it difficult to obtain a sufficient scrubbing effect.

The material applied to the resin capsule according to the present invention is selected to have sufficient impermeability to the oily component in order to obtain storage stability when the oily component is included. Examples of such substances include acrylic acid, methacrylic acid, acrylic acid esters (methyl ester, ethyl ester, etc.), methacrylic acid esters (methyl ester, ethyl ester, etc.), vinyl acetate, vinyl chloride,
Examples thereof include homopolymers and copolymers selected from vinylidene chloride, ethylene, propylene, styrene, divinylbenzene, ethylene glycol dimethacrylate and the like. Further, since the resin capsule is to be added to cosmetics, it is preferable that the capsule film does not contain a monomer or the like that may have a harmful effect.

Next, the oily component contained in the resin capsule may be any as long as it has a lubricating action at the time of disintegration, and examples thereof include higher fatty acids such as palmitic acid, stearic acid, oleic acid, linoleic acid, isostearic acid, cetanol and oleyl. Alcohol, higher alcohols such as lanolin alcohol, waxes such as beeswax, candelilla wax, hydrocarbons such as liquid paraffin, squalane, and vaseline,
Isopropyl myristate, esters such as glycerin-2-ethylhexanate, oil-soluble vitamins such as vitamins A, B ₂ , D and E, red 215, red 225, yellow 204
No., purple 201, blue 403 and the like oil-soluble dyes, other silicone oils, fragrances and the like, in any case as long as it is an oil-based raw material generally applied to cosmetics, it is not limited to these Absent. In addition, especially in the case of resin capsules containing oil-soluble dyes, the dyes elute due to the collapse of the resin capsules during scrubbing, making it easy to visually check the degree of scrubbing, and to prevent excessive scrubbing effects. Can be achieved.

Regarding the method for producing the resin capsule according to the present invention,
For example, the in-situ polymerization method described in JP-A-59-73510 and JP-A-60-824 is most preferable, but if the composition of the resin capsule described above is satisfied, It is not limited to the polymerization method.

Hereinafter, for reference, an example of manufacturing the resin capsule according to the present invention will be described.

Production Example 1. (A) Laponite XLG 3 parts Water 2750 parts (B) Sodium chloride 6 parts Water 250 parts (C) Methyl methacrylate 320 parts Vinyl acetate 40 parts Ethylene glycol dimethacrylate 40 parts Benzoyl peroxide 4 parts (D) Squalane 420 parts Olive oil 180 parts Oleic acid 1 part (A), (B) and (C) were separately dispersed and dissolved. Next, (C) was added to (D) and dissolved uniformly to obtain an oil phase.
After adding (B) to (A) and confirming that fogging occurred in the system, an oil phase (C + D) was added to coarsely emulsify, and then emulsification was performed with a homomixer at 6000 rpm for 2 minutes. This suspension was transferred to a reactor equipped with a reflux condenser, a stirrer, a thermometer, and a nitrogen inlet tube, and the polymerization reaction was carried out at 65 ° C for 12 hours, then 100 ml of a 4 wt% aqueous solution of potassium persulfate and 2 wt% of sodium sulfite. % 100% aqueous solution was added and post-polymerization was carried out for 2 hours to complete microencapsulation. The reaction solution slurry was suctioned, washed with water and dried to obtain a dried product of the target resin capsule (average particle size 150 μm, encapsulation rate 60% by weight).

Production Example 2. (A) Laponite XLG 4 parts Water 3000 parts (B) Methyl methacrylate 285 parts Vinyl acetate 15 parts Benzoyl peroxide 2 parts (C) Liquid paraffin 700 parts Oleic acid 1 part (A), (B) Dispersed and dissolved separately. Next (B)
Was added to (C) and dissolved uniformly to obtain an oil phase. After adjusting the pH to 3.5 by adding hydrochloric acid to (A) and confirming that the system was cloudy, add an oil phase (B + C) to coarse emulsify, then emulsify with a homomixer at 5000 rpm for 3 minutes. I did. This suspension was transferred to the same reactor as in Production Example 1 and microencapsulated under the same conditions to obtain a dried product of a target resin capsule (average particle size 300 μm, encapsulation rate 70% by weight).

Here, the characteristics of the scrub cosmetic of the present invention will be described in detail. First, the resin capsule is soft and has appropriate elasticity by encapsulating an oily component, and has a spherical shape. In addition, it is possible to exert a cleansing effect and a massage effect under the condition that the rolling property is excellent and the burden on the skin is small.

Secondly, the resin capsule can be confirmed by touch or visual inspection,
Moreover, it has a particle size range that allows it to enter into fine wrinkles such as the face while performing an appropriate scrubbing effect without excessive polishing and pain, and promotes blood circulation and skin. It is possible to exert effects such as adsorption removal of waste products.

Third, the resin capsule collapses when excessive force is applied during the scrubbing operation, and the degree of scrubbing can be ascertained by visually confirming the texture and coloring of the entire cosmetic composition due to the dissolved pigments. It is possible to provide a scrub cosmetic that prevents an excessive scrub effect and can be easily used even by a person who uses the scrub cosmetic for the first time. Further, the eluted oily component plays a role as a lubricant between the fine particles of the disintegrated capsule shell and the skin, so that there is no fear of damaging the skin.

Next, in order to evaluate the scrub cosmetics of the present invention, the cleansing cream (a) and the massage cream (b) of the present invention shown in Examples 1 and 2 below, and Comparative Examples 1 and 2 below. Cleansing cream (c) and massage cream (d) in which resin capsules were replaced with conventional polyethylene powder (particle size 200 μm), and as a control, cleansing cream (e) without the resin capsules in Examples 1 and 2 below, and Using the massage cream (f), a sensory evaluation test was conducted on 10 dedicated panels. The method is as follows.

(Method) (a) Scrub effect (cleansing ^{* 1)} or massage ^{* 2)} ), (b) Smoothness (rolling) during scrub, (c) Discomfort during scrub (pain, etc.), (ni) )
Each evaluation item of feeling of use was judged by a specialized panel according to the following evaluation criteria, and the results are shown in Table 1. still,
The numerical values in the table are average values of evaluation values.

* 1) Cleansing effect After applying a certain amount of make-up make-up for 1 hour, 0.4g of the sample cream ((a), (c), (e)) is spread evenly on the face and rubbed with the fingertips several times. After wiping off with a tissue paper, the cleansing effect was judged by observing stains with the naked eye.

* 2) Massage effect 0.4g of sample cream ((b), (d), (f)) is applied to a clean face after washing the face, and massage is performed while drawing a spiral line using the middle finger and the ring finger. The massage effect was judged by observing the condition of the skin after the massage.

As shown in the results of Table-1, the scrub cosmetics (a) and (b) of the present invention are the control cream (e),
Compared with (f), the scrubbing effect such as cleansing effect and massage effect was remarkably improved, and there was almost no deterioration in function on the tactile surface. on the other hand,
Regarding the creams (c) and (d) of the comparative products, although the scrubbing effect was certainly improved to some extent, it was also clarified that the functional deterioration on the tactile side was remarkable.

Examples of the present invention will be shown below, but the present invention is not limited to these examples. The mixing ratio is% by weight.

Example 1 Cleansing Cream (A) Beeswax 7 Cetanol 3 Lanolin 4 Liquid Paraffin 35 Glyceryl Monostearate 1.5 POE (45) Monostearate 2.5 Butylparaben 0.1 (B) Resin Capsule (Production Example 1) 7 (C) Propylene Glycol 5 Methylparaben 0.2 Purified water 34.5 (D) Perfume 0.2 (Method) (A) was dissolved at 70 ° C, and (B) was added to disperse it.

(C) was melted at 70 ° C., and (A) + (B) was gradually added thereto to emulsify. This was cooled, (D) was added at around 50 ° C., and further cooled to obtain a cleansing cream.

Example 2. Massage cream (A) Beeswax 8 Cetanol 2 Vaseline 10 Liquid paraffin 35 Sorbitan monostearate 1 POE (20) Sorbitan monostearate 3 Butylparaben 0.2 (B) Resin capsule (Production example 2) 3 (C) 1.3 -Butanediol 7 Methylparaben 0.1 Purified water 30.5 (D) Perfume 0.2 (Method) The same procedure as in Example 1 was carried out.

Claims (4)

[Claims] 1. A scrub cosmetic containing a compression-disintegrating soft resin capsule containing an oily component, wherein the particle size of at least 50% by weight of the total amount of the compression-disintegrating soft resin capsule is 100 to 400 μm. Scrub cosmetics characterized by. 2. The oily component is one or more selected from higher fatty acids, higher alcohols, waxes, hydrocarbons, esters, oil-soluble vitamins, oil-soluble pigments and silicone oil. The scrub cosmetic according to item 1. 3. The scrub cosmetic according to claim 1, wherein the amount of the oily component contained in the compression-disintegrating soft spherical resin capsule is 30 to 80% by weight of the whole capsule. 4. The scrub cosmetic according to claim 1, wherein the content of the compression-disintegrating soft spherical resin capsule is 0.5 to 15% by weight based on the entire scrub cosmetic.