KR960003820B1 - Cellular rubber and the method for manufacturing the same and the cosmetic puffs made of the same - Google Patents

Abstract

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Description

Cell rubber and its manufacturing method and cosmetic puff which consists of this cell rubber

1A to 1C are schematic cross-sectional views each showing a different sized cell.

2 is a schematic cross-sectional view showing a puff of the prior art.

* Explanation of symbols for main parts of the drawings

1: rough side 2: cell or bubble

The present invention relates to a method for producing a celber having a compact cell structure which is particularly suitable for use as a material for cosmetic puffs.

The present invention also relates to a cell rubber produced by the above method and a cosmetic puff comprising the cell rubber.

Cosmetic puffs conventionally used include a cell rubber obtained from a rubber latex and a sponge rubber having an open cell structure and a dense cell structure.

Each of these known puffs has the following problems. For puffs made of latex, the liquid foundation is absorbed by the puff and the hands are likely to be contaminated with the foundation. In addition, the solid foundation is easy to enter into the puff and difficult to clean the puff after use. In addition, there is a problem that bacteria or bacteria are not sanitary because it is easy to breed and hard to dry the inside of the puff.

For the latter sponge rubber, bubbles are too dense and slipping occurs during makeup. In order to solve this slipping problem, it is common to roughen the surface of the sponge rubber by post-treatment such as polishing to form the rough surface 1 as shown in FIG. Here, reference numeral 2 denotes a cell or bubble. However, this has a problem that rough surfaces are brittle.

Accordingly, an object of the present invention is to solve the problems of the prior art to provide a method of manufacturing a cell rubber having a compact cell structure suitable for use as a cosmetic puff.

Another object of the present invention is to provide a cosmetic puff consisting of the cellulose prepared by the above method.

According to one embodiment of the present invention, water is added to a highly absorbent resin and the mixture is left to form a hydrous gel, and the hydrogel is added to the rubber compound to vulcanize the mixture. The present invention provides a method for producing a celber which foams under conditions sufficient to produce a celber having a dense cell structure.

Preferably, azodicarbonamide is further added to the rubber compound as a blowing agent.

According to another embodiment of the present invention, there is also added a silicone-modified rubber, comprising a hydrogel comprising water and a superabsorbent resin to form and foam the mixture to obtain a dense cell puff material. To provide puffs. In this case, it is preferable that azodicarbonamide is added as a blowing agent. Foaming occurs due to the action of moisture in the azodicarbonamide blowing agents and / or hydrogels.

By the method of the present invention, water is first added to the high absorbent resin. The high absorbent resin used in the present invention can obtain a water-containing gel or a hydrogel when the resin is left in water. The resin includes, for example, isobutylene-maleic anhydride copolymer crosslinked product, carboxymethylcellulose crosslinked product, polyethylene oxide crosslinked product and the like. Of course preferably isobutylene-maleic anhydride copolymer crosslinked is used. This product is available as a KI gel from Kuraresa. Generally, the resin is added in an amount of 1 to 50 g / 100 ml of water with respect to water.

The mixture is then left for a sufficient time to produce a hydrous gel. The hydrous gel is usually produced in 1 to 10 hours.

The rubber compound is then added to the hydrous gel. The rubber compound used in the present invention is benzoyl peroxide, di-t-butyl peroxide, 2, 5-dimethyl-2, 5-di-t-peroxyhexane, t-butyl cumylfer as a large amount of rubber and a crosslinking agent. It may be a rubber compound composed of a small amount of additives such as oxides and the like.

The shape of the rubber is not limited, and preferably includes silicone modified rubber, silicone rubber, ethylene-propylene-dienomethylene rubber, acrylic rubber and the like. Of course, silicone modified rubber is preferable.

Preferred hydrous gels contain an amount of 0.5 to 10 parts by weight / 100 parts by weight of rubber compound. Azodicarbonamide is used in an amount of 10 parts by weight / 100 parts by weight of the rubber compound. The crosslinking agent is not particularly limited to the form as long as it is not harmful when used as a cosmetic puff. Particularly preferred embodiments include cumyl peroxide.

Finally, the mixture is foamed to obtain a celber having a dense cell structure. Usually, the mixture is press-molded at a temperature of 120 to 180 ° C. for 5 to 30 minutes to effect foaming and vulcanization. In this way, a dense cell structure can be formed.

The cell size can be arbitrarily controlled by changing the mass ratio of hydrous gel to azodicarbonamide, as described in detail in the Examples.

As the ratio of azodicarbonamide to hydrous gel increases, the cell size increases. The preferred ratio of azodicarbonamide and gel is in the range of 100: 1 to 0.1: 1.

When using a celber for cosmetic services, it is preferable to use a silicone-modified ethylene-propylene-dienomethylene rubber. For this purpose, it is preferable to use dicumyl peroxide number as a crosslinking agent. Also preferred superabsorbent resins are isobutylene-maleic anhydride copolymer crosslinked products.

[Examples 1 to 4]

100 ml of water was added to the isobutylene-maleic anhydride copolymer crosslinked product which is a KI gel commercially available from Kuraresa, and then left overnight to obtain a hydrous gel. Azodicarbonamide (ADCA) and hydrogels, marketed as "Vinyhol AC # 1", used as blowing agents, differ from the amounts shown in the table, each containing a silicone-modified ethylene-propylene-dienomethylene containing dicumyl peroxide crosslinking agent. It was added to the rubber (SEPX-620U).

This mixture was press-molded by foaming and vulcanization on the conditions of 150 degreeC x 10 minutes, respectively, and the cellar which has a compact cell structure was obtained.

The celber obtained by the above method was measured for the size of the surface bubble and the water absorption rate. The size is measured using a magnifying glass.

The results are shown in the table.

As shown in Figures 1a to 1c, when changing the weight ratio of the ADCA and the hydrogel, the size of the cell can be adjusted, that is, as the ratio of the ADCA and the hydrogel increases, the size increases. In Fig. 1, reference numeral 2 denotes a bubble.

For comparison, the above procedure was repeated except that 6 parts by weight of ADCA were added to parts by weight of SEPX-620U without the addition of hydrous gel. The obtained celber had a foaming ratio of 7, a surface bubble size of 0.1 mm, and a water absorption of 1%.

The surface was dense. Therefore, when comparing the results of the examples with the results of the comparative example, it was found that the size increases with the increase in the water absorption rate in the present invention.

As is apparent from the above, the present invention can obtain a sponge having a dense cell structure and a rough surface without performing post-treatment.

The sponge prevents the water of the liquid foundation from getting into it. Therefore, the sponge can be easily washed with water and easy to dry, it is possible to maintain a good hygiene state.

In addition, by changing the ratio of the blowing agent and the hydrous gel, it is possible to easily change the diameter and size of the bubble.

Therefore, when used as a cosmetic puff having a fine texture, it is possible to impart optimum characteristics to the celber.

[table]

* Measured using a magnifying glass.

Claims (14)

Water was added to the high absorbent resin and the mixture was left to form a hydrogel. The hydrogel was added to the rubber compound, and the mixture was foamed under conditions sufficient for vulcanization of the rubber compound. A manufacturing method of a celber for producing a celber having a cell structure. The method of claim 1, wherein the superabsorbent resin is composed of isobutylene-maleic anhydride composed of an isobutylene-maleic anhydride copolymer crosslinked product. The method according to claim 1, wherein the high absorbent resin is added in an amount of 1 to 50 g / 100 ml of water with respect to water. The method of claim 1, wherein the rubber compound is composed of a silicon-modified rubber. The method of claim 1, wherein the hydrogel is added in an amount of 0.5 to 10 parts by weight / 100 parts by weight of the rubber compound relative to the rubber compound. The method of claim 1, wherein the foaming is carried out by press molding the mixture at a temperature of 120 to 180 ° C. The method of claim 1, further comprising azodicarbonamide added in an amount of 10 parts by weight or more / 100 parts by weight of the rubber compound with respect to the rubber compound. The method for producing a celber according to claim 7, wherein the ratio of azodicarbonamide and hydrous gel changes as the surface bubble size of the celber changes. A celber prepared by the method as claimed in claim 1. A cosmetic puff consisting of a molded cellulose obtained by adding a hydrous gel made of water and a super absorbent resin to the silicone modified rubber and pressing the mixture under conditions sufficient for foaming and vulcanization. . The cosmetic puff of claim 10, wherein the superabsorbent resin is composed of an isobutylene-maleic anhydride copolymer crosslinked product. The cosmetic puff according to claim 10, wherein the silicone-modified rubber is composed of silicone-modified ethylene-propylene-dienomethylene rubber. The cosmetic puff of claim 10, further comprising azodicarbonamide together with the hydrogel. The cosmetic puff according to claim 13, wherein the ratio of azodicarbonamide and hydrous gel changes as the surface bubble size of the cellulose is changed.