JPH03190810A - Clay-like cosmetic - Google Patents

Abstract

PURPOSE:To obtain a quickly-drying clay-like pack cosmetic having excellently removing effects on sebum, good spread on the skin, excellent touch in use and stability with time, by blending water swelling slay minerals with an emulsion of a synthetic resin in a specific ratio. CONSTITUTION:A clay-like pack cosmetic is blended with (A) 1-20wt.%, especially 3-15wt.% water swelling clay minerals such as bentonite, montmorillonite, saponite or hectorite and (B) 0.1-20wt.%, especially 0.1-20wt.% calculated as resin content of an emulsion of a synthetic resin of a vinyl polymer base such as a (meth)acrylic ester base, polyvinyl acetate base, polyvinyl chloride base or polyethylene/vinyl base or a synthetic rubber base such as polyisobutylene in a ratio of the component A:B=(10:1)-(1:6) to give a clay-like pack cosmetic having the above-mentioned effects.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a quick-drying clay-like pack cosmetic that has excellent stability over time, spreads on the skin, and feels good when used.

[Conventional technology] Among pack cosmetics, clay-like products are mainly used to remove sebum, and contain oil-absorbing powders such as kaolin, bentonite, talc, and silicic anhydride, polyhydric alcohols, and water. Generally mixed.

This clay-like pack cosmetic generally tends to cause so-called syneresis, in which water in the system separates, and has a problem in stability.

Therefore, attempts have been made to increase the viscosity of cosmetics by adding water-soluble polymers to prevent water syneresis.

However, this method cannot sufficiently prevent syneresis,
There is also the problem that the drying speed becomes slow.

Furthermore, by increasing the content of powder, the viscosity of cosmetics is increased to prevent syneresis, the sebum removal effect is increased, and the drying speed is also improved. However, with this method, if the amount of powder that can be expected to be effective is mixed, it may not spread well and be difficult to apply evenly, the appearance of the pack itself may become rough, or the gel may be affected by electrolytes etc. The problem is that it becomes easy to change.

[Problems to be Solved by the Invention] Therefore, an object of the present invention is to provide a clay-like pack cosmetic that has an excellent sebum removal effect, spreads well on the skin, and has excellent feel in use and stability over time.

[Means for Solving the Problems] Under these circumstances, the inventors of the present invention have conducted extensive research to solve the above problems, and have found that an excellent result has been achieved by blending a water-swellable clay mineral and a synthetic resin emulsion in a specific ratio. The inventors have discovered that a clay-like pack cosmetic can be obtained, and have completed the present invention.

That is, the present invention contains the following components (A) and (B) (A) water-swellable clay mineral 1 to 20% by weight (B) synthetic resin emulsion resin content of 01 to 20% by weight, and (A) and (B) (as a resin component) in a blending ratio of 10:1 to 1.6.

The water-swellable clay mineral of component (A) used in the present invention is not particularly limited as long as it has a high hydrating power and swells with water, and may be one commonly used in cosmetics. good. Examples include natural or synthetic clay minerals such as bentonite, montmorillonite, saponite, and hectorite, and commercially available products include Smectone (manufactured by Kunimine Industries), Kunipia (manufactured by Kunimine Industries), and Laponai l- (manufactured by Laporte). can be mentioned. These are blended in the clay-like pack cosmetic of the present invention in an amount of 1 to 20% by weight, but 3 to 1% by weight.
A loading of 5% by weight is particularly preferred. Contains 20% by weight
If it exceeds this, the entire system becomes hard and difficult to spread on the skin, and phenomena such as gelation are observed, causing problems in stability over time. In addition, if the amount is less than 1% by weight, it is difficult to maintain the cream-like state of the system, and at the same time, phenomena such as syneresis are observed, resulting in problems with stability over time and insufficient sebum removal effects. is not obtained.

The synthetic resin emulsion of component (B) used in the present invention is not particularly limited as long as it has a film-forming ability, and any synthetic resin emulsion commonly used in pack cosmetics may be used. Examples include vinyl polymer-based products such as poly(meth)acrylic acid ester, polyvinyl acetate, polyvinyl chloride, and polyethylene vinyl, as well as synthetic rubber-based products such as polyisobutylene. Examples include Plexitol (manufactured by Rohm & Haas) and Vinybran (manufactured by Nissin Chemical Industries, Ltd.). These are blended in the clay-like pack cosmetic of the present invention as a resin component in an amount of 0.1 to 20% by weight, and a blending amount of 1 to 10% by weight is particularly preferred. If the blending amount exceeds 20% by weight, there will be problems in terms of safety and difficulty in washing away, and if the blending amount is less than 0.1% by weight, usability such as a feeling of tension during use may not be satisfactory. gone,
In addition, phenomena such as syneresis are observed, and there are also problems with stability over time.

In the present invention, it is necessary that the blending ratio of (A) and (B) (as resin components) be within the range of 10:1 to 1:6. If the blending ratio of (A) exceeds this range, the tension during use will not be satisfactory and the drying rate will also drop significantly. If the blending ratio of (A) is less than this range, the pack itself will have a rough appearance, and phenomena such as syneresis will occur, and there will also be problems in stability over time.

The clay-like pack cosmetic of the present invention is produced, for example, by mixing the above-mentioned components (A) to (B), water, and other components commonly used in cosmetics. In addition, it is preferable to swell component (A) with water in advance and then mix it with other components.

Here, the amount of water blended in the clay-like pack cosmetic of the present invention is preferably in the range of 30 to 90% by weight, particularly 40 to 70% by weight [including the amount of water contained in component (B)]. ]. If the blending amount exceeds 90% by weight, phenomena such as syneresis will occur and there will be problems with stability over time, and if the blending amount is less than 30% by weight, there will be a problem that the entire system will become hard and difficult to spread onto the skin.

Other ingredients that may be incorporated into the clay pack cosmetic of the present invention include, for example, silicic anhydride, kaolin, talc, powders such as calcium carbonate, polyhydric alcohols, oils, lower alcohols, water-soluble polymers, and preservatives. , antioxidants, pigments, beauty ingredients, ultraviolet absorbers, etc.

[Examples] Hereinafter, the present invention will be explained in more detail by giving examples, but the present invention is not limited thereto.

Example 1 A clay pack cosmetic having the composition shown in Table 1 was manufactured according to the following manufacturing method and evaluated according to the following evaluation method.

(Manufacturing method) A Components (1) to (3) are heated and mixed with a portion of component (11) to swell.

B, components (4) to (5), (7) to (10) and component (
Mix the remainder of 11) uniformly.

C, A and B are mixed, and component (6) is mixed to obtain a clay pack cosmetic.

(Evaluation method) 1 piece of skin: The samples were left at 40°C for one month and evaluated by visual observation.

1.Evaluation Criteria - Sensitivity to use when gelation, unchangeable spreading, syneresis, etc. occur: Judgment was made according to the following criteria through sensory evaluation by a panel of 20 female experts.

1 rating: 1 (ease of spreading) Very easy to spread 5 Slightly easy to spread 4 Can't say either way
3: Slightly difficult to spread 2: Very difficult to spread 1 (feeling of tension when using): Very tense 5: Slightly tense 4: Not at all
3: Not much sense of tension 2: Almost no sense of tension 1 (quick drying) Very fast drying Slightly fast drying Can't say either, somewhat slow drying 7 8 Very slow drying - Evaluation standard score Average is 35 or more Average of evaluation points is 25 or more 3 Average of evaluation points is less than 25 ○ Less than 5 △ × (Hereafter the margin) It is a clay-like pack cosmetic that spreads easily and has excellent usability and stability over time.

that's all

Claims (1)

[Claims] (1) Contains the following components (A) and (B) (A) 1 to 20% by weight of water-swellable clay minerals (B) 0.1 to 20% by weight as a synthetic resin emulsion resin content, and (A) and (B) A clay-like pack cosmetic having a blending ratio (as a resin component) in a range of 10:1 to 1:6.