WO1999006015A1

WO1999006015A1 - Pack preparation

Info

Publication number: WO1999006015A1
Application number: PCT/JP1998/003355
Authority: WO
Inventors: Takashi Higashi; Shinichi Satoh; Yasushi Hayashi; Kozo Sakai
Original assignee: Sekisui Kaseihin Kogyo Kabushikikaisha
Priority date: 1997-07-29
Filing date: 1998-07-28
Publication date: 1999-02-11
Also published as: AU8358898A

Abstract

A pack preparation comprising as the base a resin ingredient which consists of either a water-soluble copolymer (A) of an anionic ethylenic monomer and an anionic or nonionic, ethylenic monomer or a combination thereof with a water-soluble homo- or copolymer (B) of an anionic or nonionic, ethylenic monomer in an amount of up to 30 wt.% based on the resin ingredient (provided that the water-soluble copolymer) (B) is different from the one (A)), and a 35 wt.% aqueous solution of which has a viscosity at 25 °C of 3,000 to 100,000 mPa.s and a pH of 3.0 to 5.5.

Description

Description Packing agent Technical field

TECHNICAL FIELD The present invention relates to a heat-resistant agent. More specifically, the present invention relates to a packing agent capable of effectively removing dirt on the skin surface, in particular, dirt components (corn plugs) on pores. Background art

Conventionally, as a peel-off type packing agent, a film-forming, creamy composition containing various hydrophilic molecular compounds has been frequently used. The main function of these packing agents is to apply them to the skin surface with a finger or the like and then dry them to remove dirt and excess sebum on the skin surface together with the formed film.

However, since many of these conventional packing agents focus on the effects of keeping the skin healthy, such as moisturizing, it can be expected to have some degree of skin cleansing, such as the removal of dirt and sebum on the skin surface. However, the effect of removing dirt inside the skin, such as pore dirt, which has extremely strong adhesion was not sufficient.

In addition, for example, a packing agent excellent in moisturizing function has been reported in which a hydrogel made by cross-linking polyacrylic acid with a polyvalent metal salt is laminated on a nonwoven fabric to form a sheet. (JP-A-54-49334, JP-A-59-93012, etc.). These publications also refer to the effect of removing dirt on the skin surface. There was a problem that the gel was destroyed at the time of release if the adhesive force was increased unnecessarily. Furthermore, because of the gel state, it did not penetrate into the pores, and the ability to remove dirt from the pores was extremely poor.

In addition to the above-mentioned packing agents, packing agents whose purpose is to remove dirt from pores around the nose and around the nose (especially around the nostrils) have been developed. Since this packing agent is used only at the nose and its surroundings, a resin component having much stronger adhesive strength than a normal packing agent can be used. Therefore, dirt (square plugs) in the pores can be effectively removed. As such packing agents, those using an adhesive and those using a polymer compound having a salt-forming group are known.o

Among them, as a packing agent using an adhesive, a sheet-like packing agent in which an adhesive such as polyacrylate is applied on a substrate is known. This packing agent is basically excellent in the ability to remove dirt on the part of the sheet surface that comes into contact with the adhesive, but it is difficult for the dirt inside the pores to come into contact with the adhesive. However, a force that could not be said to have a great removal effect was applied.

On the other hand, a packing agent for removing keratotic plugs using a polymer compound having a salt-forming group is disclosed in, for example, JP-A-5-97627, JP-A-5-21843. It is described in, for example, Japanese Patent Application Laid-Open No. Hei 5-282684.

This type of packing agent is used, for example, by dissolving a polymer compound in a solvent such as water, applying the solution to the nose, and releasing the polymer compound after drying. As a result, it is easy for the polymer compound to flow deep into the pores, and at the time of separation, the coating solidifies due to drying. The plug removal effect is enhanced.

However, when a polymer compound is applied directly to the nose, the film formed by the polymer compound is broken due to its strong adhesive strength when it is separated from the adherend, and the packing agent cannot be removed smoothly. There is a problem.

For this reason, it has been considered to apply a polymer compound to a base material such as a nonwoven fabric to form a sheet, affix the sheet to the nose, and remove the sheet together (Japanese Patent Laid-Open No. 7-330575). Such) . Specifically, a high molecular compound is applied on a sheet-like base material, and a packing agent obtained by drying is wetted with a solvent such as water, and then attached to the skin. Used after drying to separate.

However, even with these packs, it has been quite difficult to balance the pain problem when detaching from the skin surface with the keratotic plug removal effect. In other words, even if the adhesion to the skin surface was strong, pain was easily felt, and the pain was mild, but the effect of removing the angle was not sufficient. Disclosure of the invention

Thus, according to the present invention, the resin component as the main component is a water-soluble resin composed of an ethylenically unsaturated monomer having anionic properties and an ethylenic unsaturated monomer having anionic or nonionic properties. Copolymer (A) A water-soluble homopolymer or a water-soluble copolymer consisting of an ethylenically unsaturated monomer having anionic or nonionic properties of up to 30% by weight alone or in the resin component In combination with (B) (excluding the combination with the same water-soluble copolymer as (A)), the resin component has a concentration of 3 In a 5% by weight aqueous solution, it exhibits a viscosity of 3,000 to 100,000 mPa's and a pH value of 3.0 to 5.5 at 25 ° C. Packing agent will be provided.

The inventors of the present invention have concluded that the above-mentioned packing agent exhibits adhesiveness to skin, has excellent permeability to pores, exhibits strong adhesiveness to keratin plugs in pores, and is dried. It is easy for the skin to be formed to form a proper release timing due to the tension applied to the skin, and it has the effect of preventing pain due to overdrying and failure due to peeling in an undried state. I found it. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a graph comparing the drying speeds of the resin components constituting the packing agent of the present invention with those of a commercial product. Embodiment of the Invention

The packing agent according to the present invention is characterized by using a specific anionic copolymer as a whole as the resin component of the main agent.

Here, when a cationic polymer is used, the drying speed of the polymer is extremely slow, and it takes time until the keratotic plug can be removed (until the polymer is dried), which is problematic in terms of convenience. In addition, when only an anionic homopolymer is used, the film becomes hard when dried when the polymer is formed into a sheet. Therefore, it is difficult to fit the sheet along the curved surface of the skin during use. Furthermore, the speed of immersion in water and subsequent adhesion to the skin is not sufficient, and it takes a long time to dry (removal of the plug). There is.

On the other hand, the pack agent of the present invention solves the above-mentioned problems, and can alleviate pain when detached from the skin, and can effectively remove keratotic plugs.

Hereinafter, the present invention will be described specifically.

The resin component of the present invention may be a water-soluble copolymer (A) alone composed of an ethylenically unsaturated monomer having anionic property and an ethylenically unsaturated monomer having anionic or nonionic property, or may be a resin component. Up to 30% by weight of a water-soluble homopolymer or water-soluble copolymer of an ethylenically unsaturated monomer showing anionic or nonionic properties (B) (however, the same water-soluble copolymer as (A)) (Excluding combinations with polymers).

First, the water-soluble copolymer (A) will be described below.

As long as the copolymer itself is water-soluble, the water-soluble copolymer (A) (hereinafter, also simply referred to as component (A)) can be used even if one of the constituent monomers is not water-soluble. Good.

Here, in the present invention, the term “water-soluble” used in water-soluble copolymers, water-soluble homopolymers and the like refers to a packing agent which is used in the skin and nose as a soothing agent. In addition, it means that in the case of a copolymer as a resin component or a combination of a copolymer and a homopolymer, it is likely to be dissolved in water due to moisture derived from skin. When the viscosity of the resin component of the present invention is specified, a resin aqueous solution of 35% by weight is used. However, it goes without saying that an aqueous solution is shown at least at such a concentration.

More preferably, the ethylenically unsaturated monomer having anionic properties is used. Such as acrylic acid, methacrylic acid, (phthalic anhydride), maleic acid, and itaconic acid containing carboxyl groups, vinyl sulfonic acid, styrene sulfonic acid containing sulfonic acid groups, and the like. And a polymer derivative.

On the other hand, examples of the ethylenic unsaturated monomer having anionic or nonionic properties to be copolymerized with the above-mentioned monomers include the following monomers. First, as the anionic ethylenically unsaturated monomer, the same monomers as described above can be used. Examples of the nonionic unsaturated monomers exhibiting nonionic properties include water-soluble monomers such as acrylamide and vinylpyrrolidone, as well as vinyl acetate, methyl acrylate, ethyl acrylate, and acrylic acid. Examples include esters such as propyl acrylate and butyl acrylate, and derivatives of these monomers.

The above monomers can be used in an appropriate combination in order to achieve desired properties of the packing agent.

The use of a homopolymer obtained by polymerizing a monomer having a single anionic property increases the bond between polymers due to crystallization during drying, and increases the film strength. Tends to lack. However, by using a water-soluble copolymer copolymerized with different monomers, a certain degree of flexibility is exhibited even when dried.

Here, as the water-soluble copolymer, a water-soluble copolymer containing a component derived from a monomer having a side chain such as methacrylic acid can give more flexibility. In addition, a water-soluble copolymer composed of anionic monomers and a water-soluble copolymer of an anionic monomer and a water-soluble nonionic monomer are used for the flexibility of the film and the water-soluble property. It is preferable because it is easy to keep the balance to a certain degree. Furthermore, anionic monomers and hydrophilic A water-soluble copolymer with an anionic or nonionic monomer that is not hydrophilic has good compatibility with a keratotic plug containing a large amount of an oily component due to a component derived from a monomer that is not hydrophilic. However, in this case, it is necessary to copolymerize the entire water-soluble copolymer within a range that does not lose water solubility.

In addition, in the water-soluble copolymer, the component derived from the ethylenically unsaturated monomer having anionic properties may form a salt in whole or in part. Specific examples of the salt include a sodium salt, a potassium salt, and a sodium salt.

Further, the proportion of the component derived from the ethylenic unsaturated monomer having anionic properties contained in the water-soluble copolymer is preferably at least 60% by weight. If this ratio is 60% by weight or more, sufficient adhesive strength to the skin and the dirt components on the skin and the surface can be obtained, and the keratotic plug removal performance is further improved.

As a monomer for obtaining the water-soluble copolymer, a combination of acrylic acid, methacrylic acid and / or vinylsulfonic acid is particularly preferred.

More specifically, the water-soluble copolymer comprises acrylic acid and methacrylic acid and Z or vinyl sulfonic acid (including their salts) in a ratio of 9: 1 to 6: 4 (weight ratio). Preferably, they are copolymerized. If the ratio of acrylic acid exceeds 9, acrylic acid-derived components tend to crystallize, and when dried, the film becomes very hard and lacks flexibility, which is not preferable. Further, when the ratio of acrylic acid exceeds 9, the dissolving speed of the water-soluble copolymer after the moistening is reduced in the type of packing agent that is used by rewetting the once dried sheet. Slower, longer time to use and less convenient Not good. Further, if the ratio of the component derived from acrylic acid is less than 6, the adhesiveness to the keratotic plug is reduced and the water solubility is also not preferred.

A particularly preferred water-soluble copolymer is a copolymer of acrylic acid and methacrylic acid.

Next, the water-soluble homopolymer and the water-soluble copolymer (B) (hereinafter, also simply referred to as the component (B)) will be described below.

First, when the component (B) is a copolymer, any one of the monomers constituting the copolymer may not be water-soluble as long as the copolymer itself is water-soluble.

More preferably, ethylenic unsaturated monomers having anionic properties include carboxylic acid containing a carboxyl group, methacrylic acid, (phthalic anhydride), maleic acid, itaconic acid and the like. And vinyl sulfonic acid containing sulfonic acid group, styrene sulfonic acid and the like, and derivatives of these monomers. On the other hand, nonionic ethylenically unsaturated monomers include water-soluble monomers such as acrylamide and vinylpyrrolidone, as well as vinyl acetate, methyl acrylate, and ethyl acrylate. And esters such as propyl acrylate and butyl acrylate, and derivatives of these monomers.

The above monomers can be appropriately combined in order to achieve desired properties of the packing agent.

When a packing agent having desired characteristics can be obtained only with the component (A), the component (B) may not be added. When the component (B) is added, its mixing ratio is up to 30% by weight.

Next, the resin component contained in the packing agent of the present invention is a water solution having a concentration of 35%. It has a viscosity of 3,000 to 100, OOO m Pa'S at 25 ° C in solution.

When used as a packing material for removing plugs, it is necessary for resin components dissolved in water to penetrate deep into the pores in order to pull out plugs clogged in the pores. From this viewpoint, if the withering degree exceeds 100,000 mPa · S, the permeability to the pores becomes insufficient, which is not preferable.

On the other hand, in order to complete the withdrawal of the plug, after forming the skin by the resin component, the strength of the resin component film capable of pulling out the plug with the separation from the skin is required. However, it is not preferable to use a resin component having a degree of shaping less than 3,000 mPa · S because sufficient strength cannot be obtained. In addition, there is another problem that the resin component easily flows and is repelled when applied to the skin surface or a sheet.

The viscosity of the resin component may be within the above range, but particularly preferred is the range of 100,000 to 100, OOOmPa.S.

In order to improve the keratotic plug removal performance which is one of the objects of the present invention, it is preferable to mix the above component (A) having a relatively high molecular weight with the component (B) having a relatively low molecular weight. In other words, the above component (A), which has excellent film strength after drying and solidification, and the low molecular weight component (B), which has excellent pore permeability and water solubility, work synergistically to improve corn plug removal performance and use. A packing agent with an excellent balance of properties can be obtained.

The preferred mixing ratio of the relatively high molecular weight component (A) and the low molecular weight component (B) is 70 to 99% by weight for the former and 1 to 30% by weight for the latter. . The preferred range of the weight-average molecular weight of each component is 100, 000 to 350, 0000 (all of which are aqueous GPs). The value is in the range of 5,000 to 500,000. ,

The more preferable range of the weight average molecular weight is as follows: the relatively high molecular weight component (A) is 150,000 to 300,000, and the low molecular weight component (B) is 8,000,000. 3 0, 0 0 0.

Here, in the present specification, the resin component is specified not in terms of molecular weight but in terms of viscosity in an aqueous solution state for the following reason.

That is, generally, the molecular weight of the resin component is important in the sense that it is closely related to the viscosity of the aqueous solution. However, the viscosity of the aqueous solution differs depending on the molecular structure of the resin component even if the molecular weight is the same. Therefore

However, it is more preferable to define the resin component that is soluble in water at the time of use for the use form of the present invention in terms of the viscosity in an aqueous solution state rather than the molecular weight range. It is.

An aqueous solution of the resin component having a concentration of 35% by weight has a pH value of 3.0 to 5.5. Although the details of the principle are not clear, in the region where the pH value of the aqueous solution of the resin component used in the pack of the present invention exceeds 5.5, dirt components on the skin surface such as horn plugs are observed. It has been found that the ability to remove water is significantly reduced. Under these conditions, the packing agent of the present invention must have a pH value between 3.0 and 5.5.

When the pH value is less than 3.0, it has a large effect on the skin surface, and even when used for a short period of time such as a pack, it is not practical because it easily causes skin rash and other symptoms. Considering the case where it is attached to the surface of the skin I for a long time, the more preferable pH range is 4.0 to 5.5. The resin component, which is the main component of the packing agent of the present invention, is premised on use on the skin surface, and its pH value is as close to 5.5 as possible. It is desirable that

If the pH value of the aqueous solution of the resin component having the above concentration is originally between 3.0 and 5.5, it can be used as it is, but if the pH value is lower than this range, the basic substance is used. What is necessary is just to add and adjust suitably. As such a basic substance, it is preferable to use a monovalent base such as an alkali metal hydroxide or ammonia. The adjustment of the pH value may be performed after the polymerization of the components (A) and / or (B), or may be performed at the stage of the monomer before the polymerization.

The resin component contained in the packing agent of the present invention can be obtained by polymerizing the monomer constituting the resin component by heat, light, ultraviolet light, or the like using a radical polymerization initiator based on a known radical polymerization technique. Can be.

The use form of the pack of the present invention is preferably a peel-off type pack attached to the skin surface. The packing agent of the present invention is excellent in peeling off the film when the resin component, which has become an aqueous solution due to moisture during use, penetrates into the pores and then dries and strongly adheres to the corners. It can exhibit the horn plug removal performance. Specific examples of the usage of the packing agent include a general paste and a sheet formed by applying and molding the packing agent on a base material. Even if these knocking agents have a strong adhesive action, it is preferable that the knocking agent be in a sheet form that is less likely to break the resin film at peel-off. Non-woven fabrics and woven fabrics are examples of sheet base materials.

When applying the packing agent to the base material as described above, the resin component of the present invention is used in an amount of 5 to 95 parts by weight and water is used in an amount of 5 to 95 parts by weight as an adhesive material. Is preferred.

In addition, the packing agent replaces the ingredients used in ordinary cosmetics with other additives. May be included. Such other components include inorganic powders such as silica, talc, and titanium oxide for improving the drying performance and adhesion performance, and improving the flexibility at the time of film formation and the ease of compatibility with the skin surface. Pigments and dyes for coloring, such as surfactants and oils and fats used in combination therewith, fragrances, and preservatives such as parabens and benzoic acids to prevent spoilage during storage.

Hereinafter, a case of a sheet-like packing agent, which is a preferred use form of the packing agent of the present invention, will be described.

First, if the adhesive layer made of the packing agent applied and molded on the sheet base material is pre-moistened, the initial adhesion at the time of attachment to the skin and the adhesion of the adhesive to the pores will be improved. Sufficient permeability can be ensured. More preferably, the skin or the surface of the adhesive layer is preferably wetted with water before use and attached to the skin at the time of use.

Here, the adhesive layer preferably contains 60 to 95% by weight of a resin component, a small amount of an additive, and the balance of water. Further, the resin component is preferably 65 to 75% by weight.

Of the above, the adhesive layer preferably contains 5 to 40% by weight of water. If it is less than 5% by weight, the entire sheet becomes hard, the dissolution rate in water is reduced, and the initial adhesiveness at the time of application is reduced, which is not preferable. On the other hand, if it exceeds 40% by weight, the adhesive layer is not sufficiently hardened, and the usability deteriorates. In order to prevent drying of the sheet-like packing material, it is desirable that each sheet be used as it is and be packaged in a sterile and sealed state.

In the case of a sheet-like packing material, a release paper or a plastic film is usually attached to the surface of the adhesive layer. These separations Paper or film cannot be peeled off or peeled off due to insufficient peeling properties of the adhesive layer, which has been adjusted with moisture content to have sufficient adhesion, adhesion and flexibility to the skin. Otherwise, the adhesive layer may be destroyed. Therefore, even when the adhesive layer is added with 0.1 to 5% by weight of a nonionic lipophilic surfactant to increase the water content and obtain a soft touch, the release layer is not used. Separation from the film and the protective film can be easily secured.

Specific examples of the above-mentioned nonion-based lipophilic surfactant include sugar fatty acid esters and polyoxetylene polyoxypropylene block copolymers.

Example

Hereinafter, the effects of the present invention will be specifically described with reference to examples.

(Synthesis example of water-soluble polymer)

The hydrophilic polymerizable monomers were mixed in the amounts shown in Table 1 and polymerization was carried out in the aqueous solution state. Specifically, a water-soluble polymer was synthesized by the following method. That is, a raw material (monomer) other than the initiator (lium persulfate, lithium pyrosulfite) was placed in a glass container having a capacity of 200 ml by weight as shown in Table 1. Next, the residue was supplemented with ion-exchanged water so that the total amount including the initiator was 100 parts by weight, to obtain an aqueous solution in which monomers were mixed. After uniformly stirring this aqueous solution, a certain amount of initiator was added. Further, the mixture was stirred uniformly and stirred in 40 heating units for 2 hours to complete the polymerization, thereby obtaining a water-soluble polymer.

Table 1 also shows the weight-average molecular weight of the obtained water-soluble polymer. The weight average molecular weight is a value based on pullulan conversion by aqueous GPC. The measurement conditions were as follows: HPLC: LC-16A manufactured by Shimadzu, Column: Shodex Ohpak SB-806 HQX 2 tubes, Column temperature: 40 ° C, Solvent: 0.2 M NaNC, Flow rate: 0.7 ml / min, Detector: Shodex SE-61 RI Detector, Standard substance: Shodex pullula And

table 1

A basic substance (sodium hydroxide) or ion-exchanged water (pH 6.5) shown in Table 2 was added to the aqueous solution containing the water-soluble polymer, and the resin concentration was 35%. Was adjusted to an aqueous solution. In addition, adjust the temperature of the aqueous solution to 25 ° C. After adjustment, pH and viscosity were measured. The pH value was measured using a pH meter with a glass electrode, and the viscosity was measured using a B-type viscometer after adjusting the temperature of the measurement target to 25 ° C. Table 2 shows the measurement results.

Table 2

(剝 Release pain, horn plug removal and initial solubility test) Pastes were prepared by adding the other components in the amounts shown in Table 3 to each of the resin components of the above Formulation Examples 1 to 14. This paste was applied to a 50-m-thick PET file (release paper) so that the coating amount of the pure resin was 63 g / m ² . Thereafter, drying was performed in a dryer at 70 ° C. for 20 minutes. Next, a non-woven fabric of a polyester-polyethylene blend having a basis weight of 25 g / m ² as a sheet base material was pressed against a semi-dry, pasted surface and dried for 10 minutes to form 14 sets. A sheet packing agent was obtained.

Table 3

Each of these sheet-like packing agents was cut into small pieces having a size of about 15 × 30, and the PET film was removed. Thereafter, the sheet-like packing was pressed against the nostrils wet with the water after washing the face. Among the sheet-like packings, those of Formulation Examples 1 to 8 immediately adhered to the nostrils, and did not come off during drying for 20 minutes. On the other hand, in the case of Formulation Example 10, it did not stick to the nostrils immediately after being pressed, but had to be pressed for a while. In addition, the compound of Formulation Example 9 was likely to come off during drying for 20 minutes, and it was necessary to hold down from the middle. After drying, the result of peeling off the sheet-like packing material is to The degree of removal of the horn plug was evaluated in a three-point scale based on the following criteria.

(1) Pain at separation

1. I feel severe pain

2. I feel pain.

3. There is almost no pain when peeling.

Evaluations were reported by each panelist.

(2) How to remove the square plug

1. The square plug cannot be removed at all. (No. of square plugs)

2. You can remove a little bit of the square plug. (1 to 20 square plugs)

3. The angle can be easily removed. (Square 拴 number 20 or more)

The horn plug emits fluorescence when irradiated with ultraviolet light, and by using this property, the number of horn plugs can be reduced by irradiating the packing agent with ultraviolet light using a wood lamp and counting the number of the portions. It was measured. Except for the hair, it was lightened.

The evaluation was calculated by averaging the evaluation results of 20 female panelists. When measuring one sample, the panelists performed the measurement one week before that without performing the same evaluation. In addition, for comparison between two specific samples, the test sample and the comparative sample are affixed symmetrically around the center line of the nose, and the number of plugs is counted according to the method described above. We compared whether there was a significant difference between the two methods.

(3) Initial solubility in water

After wetting the once dried sheet with water, the initial dissolution performance was measured by the following method in order to measure the time until the water-soluble polymer was dissolved and adhered. The packing agent prepared in the same manner as above was cut into 30 × 60 mm, dried in a dryer at 120 ° C. once for 30 minutes, and weighed precisely. The pack was then immersed for 30 seconds in a glass beaker containing 500 ml of deionized water at 25. Further, the packing agent was taken out, placed again in a dryer at 120 for 60 minutes, dried, and weighed precisely. The amount of weight loss after immersion compared to before immersion in deionized water was defined as the amount of polymer eluted.

Table 4 shows the measurement results of the above (1) to (3).

Table 4

Table 5 shows the results of comparison between two specific samples. Table 5

From Tables 4 and 5 above, it was found that the packs of the examples were excellent in pain at the time of separation, removal of horn plugs, and initial solubility.

(Release test with release paper)

Other additives including the nonionic lipophilic surfactant in the amounts shown in Table 6 below were added to the resin component of Example 1 to prepare a paste.

Table 6

The releasability between the pastes of Examples 9 and 10 and the PET film was examined by the following method together with the paste of Example 1. That is, it was applied to a 50 / m-thick PET film so that the application amount of the resin component was 63 g / m ² . On top of this, a nonwoven fabric of polyester Z-polyethylene blend having a basis weight of 25 g / m ² was placed, and placed in a drier at 70 to dry. In this drying operation, by changing the drying time between 5 minutes and 30 minutes, sheet packing agents having various moisture contents were prepared.

The water content was determined by cutting the sheet-like packing agent in half, drying one of the sections at 120 ° C. for 3 hours, and reducing the weight. Further, the PET film on the other section was peeled off, and the state of the plaster at the time of separation was observed and evaluated based on the following criteria. Table 7 shows the results.

X The plaster adheres entirely to the PET film and cannot be separated. △ Part of the plaster adhered to the PET film side and could not be separated. 〇 The plaster and film are easily separated.

From Table 7, it was found that the packing agent containing the nonionic lipophilic surfactant had excellent releasability from the release paper. (Comparison of the angle between the packing agent of a commercially available product and a cationic water-soluble polymer and the packing agent of Example 1)

As Comparative Example 7, a commercially available sheet-like packing agent (Biore pore packing; Kao) was used. Except for using a 35% by weight aqueous solution of a commercially available cationic polymer (trade name: Shalol (polychlorinated methylacryloyloxyshethyl trimethylammonium: QDM); manufactured by Daiichi Kogyo Seiyaku) A paste was prepared with the same formulation as in Table 3, and a sheet-like packing was prepared in the same manner as in Example 1. This sheet-shaped packing agent was used as Comparative Example 8. The superiority of the corner shape of the sheet-like packing material of Example 1 over Comparative Examples 7 and 8 was confirmed by the following method. The 40 panelists were divided into two groups of 20 people, and after washing their face, the sample cut to 20 mm and 30 mm was separated from the center line of the nose between Example 1 and Comparative Examples 7 and 8. To the left and right symmetrically. One of the groups was 10 minutes after pasting, and the other group was 20 minutes after pasting. The pack of Example 1 was applied as soon as it was pressed against the nose, and adhered well after 10 minutes and 20 minutes, whereas the packs of Comparative Examples 7 and 8 were applied. All of the preparations did not immediately adhere to the nose even when pressed against the nose, and it took some time until the adhesive strength was obtained. By counting the number of plugs in the sample with 剝 by the above method and comparing the numbers, it was compared whether there was any significant difference between the 栓 plug and the plug removal. Table 8 shows the results. The test was performed indoors at a temperature of 23 and a humidity of 60%.

Table 8

From Table 8 above, the sheet-like packing material of Example 1 is commercially available. It was found to have a superior keratotic plug removal power than the sheet-like packing material. In addition, it was found that the packing agent composed of an anionic resin component had better keratotic plug removal power and drying property than the packing agent composed of a cationic resin component.

(Comparison of drying speed between the commercial product and the packing agent of Example 1)

The resin solution used to prepare the sheet-like packing agent of Example 1 was adjusted to a water content of 25% by drying in a petri dish, and the resin extracted from a commercial product (Comparative Example 7) The solution was placed in a thermo-hygrostat at 37 with a humidity of 35%. The weight loss rate of each resin solution was measured with time. The results are shown in Figure 1.

From FIG. 1, it was found that the water content of the resin solution used in the packing agent of Example 1 evaporated faster than that of the commercial product. This result means that the packing agent of Example 1 dries faster in use than the commercial product.

Claims

The scope of the claims

1. The water-soluble copolymer (A), which is composed of an ethylenically unsaturated monomer having anionic properties and an ethylenic unsaturated monomer having anionic or nonionic properties, is used as the resin component as the main component. Alternatively, a water-soluble homopolymer or water-soluble copolymer comprising up to 30% by weight of an anionic or nonionic ethylenically unsaturated monomer in the resin component (B) (however, the same water-soluble as (A)) The combination of the resin component and the resin component in the aqueous solution having a concentration of 35% by weight at 25 ° C. is 3,000 to 100,000 mPa. · Packing agent consisting of S viscosity and pH value of 3,0 to 5.5.

2. The water-soluble copolymer (A) is an anionic ethylenically unsaturated monomer selected from acrylic acid, methacrylic acid and vinyl sulfonic acid, and acrylic acid and methacrylic acid. The packing agent according to claim 1, which is a copolymer with an anionic or nonionic ethylenic unsaturated monomer selected from an acid, vinyl sulfonic acid, acrylamide or vinylpyrrolidone.

3. The packing agent according to claim 2, wherein the water-soluble copolymer (A) is a copolymer of acrylic acid, methacrylic acid and / or vinylsulfonic acid.

4. Water-soluble copolymer (A) A copolymer obtained by copolymerizing acrylic acid with methacrylic acid and Z or vinyl sulfonic acid in a weight ratio of 9: 1 to 6: 4. 4. The packing agent according to claim 3, which is:

5. A water-soluble copolymer whose resin component has a weight-average molecular weight of 100,000 to 350,000 (pullulane equivalent based on aqueous GPC; the same applies hereinafter) (A) and a water-soluble homopolymer or copolymer (B) having a weight average molecular weight of 50,000 to 500,000 up to 30% by weight in the resin component (B). 4 Any one packing agent.

6. The packing agent according to any one of claims 1 to 5, wherein the packing agent further contains 0.1 to 5% by weight of a nonionic lipophilic surfactant as an additive.

7. The packing agent according to claim 6, wherein the nonionic lipophilic surfactant is a sugar fatty acid ester or a polyquinethylene polyoxypropylene block copolymer.

8. The packing agent according to any one of claims 1 to 7, comprising 60 to 95% by weight of a resin component, a small amount of an additive, and the balance of water.

9. The packing material according to any one of claims 1 to 8, wherein the packing material is used for removing keratotic plugs.

10. The packing agent according to any one of claims 1 to 9, wherein the packing agent is laminated on a sheet-like base material.

11. The packing material according to claim 10, wherein the sheet-like base material is a nonwoven fabric.