JPS6099180A - Aqueous tackifier composition - Google Patents

Abstract

PURPOSE:To provide the titled composition of high adhesivity, cohesive force, water resistance and safety, switable for adhesive tapes and pressure-sensitive medical tapes, comprising polyacrylic acid (salt), cellulose derivtive, polyhydric alcohol and multivalent metallic compound. CONSTITUTION:The objective composition comprising (A) polyacrylic acid (pref. with a molecular weight 10,000-10,000,000), (B) polyacrylic acid salt (e.g. polyacrylic monoethanolamine), pref. a weight ratio (A)/(B) being 1/1-1/9, (C) cellulose derivative (pref. CMC alkali metal salt), (D) polyhydric alcohol, and (E) multivalent metallic compound(s) (pref. Al compound, Ca compound and/or Mg compound). The amounts of the components (A) plus (B), (C), (D), and (E) are optimally 0.5-20wt%, 1-15wt%, 8-40wt%, and 0.01-5wt%, respectively, each based on the whole compositon. EFFECT:With moderate moisture permeability, developing no rash or eruption at applied sites. USE:For adhesive labels, padds for hygienic use.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an aqueous adhesive composition that can be suitably used as an adhesive for adhesive tapes, adhesive labels, LF-sensitive medical tapes and sheets, sanitary pads, etc. Then,
Related to water-based adhesive compositions that have strong adhesive strength, cohesive strength, excellent water resistance, and high safety. Traditionally, adhesive tapes and adhesive labels have been used for medical purposes and packaging due to their easy usage. It is used in a very wide range of applications such as business, dispatch, office, and home use.

Such adhesive tapes and labels are made of paper, woven fabric, non-woven fabric, TCM resin, film, etc., and a support material coated with a sticky agent.The adhesive used generally has a high adhesive strength. It is required to have excellent adhesive strength, III concentration, and sword dance performance. In addition, adhesives used in pressure-sensitive medical adhesive tapes have the ability to absorb body fluids and sweat exuding from wounds, etc., so as not to sag. It is required to have moisture permeability and not cause any pain when peeled off.

Traditionally, synthetic rubber, natural rubber, rosin-based or acrylic resin dissolved in organic solvents such as toluene, hexane, benzene, etc. are often used as adhesives for adhesive tapes, and these have excellent adhesive strength. However, there are safety issues as they use solvents that are harmful to the human body, and adhesives often remain on the adherend when peeling off.
m It is easy to damage the beauty of the bamboo forest. In particular, when the object is a plastic product, the plasticizer in the product migrates to the adhesive, softening the adhesive and leaving a large amount of adhesive when it is peeled off. In this case, the adhesive remaining on the adherend can be wiped off with an organic solvent, but there is a problem in that organic solvents are difficult to obtain in general households, and it is difficult to remove adhesive residue from plastic and hanging objects. If an organic solvent is used, the plastic may be attacked, and the use of an organic solvent is not preferable from the viewpoint of safety. Furthermore, the adhesive used in this tub has extremely weak adhesion to surfaces wet with water, and has the disadvantage that it is difficult to adhere to surfaces wet with water, and even if it is stuck, it easily peels off. However, when this type of adhesive is used in pressure-sensitive medical adhesive tapes and sheets, it may get tangled in body hair and cause pain when removed, and the lack of moisture permeability may cause unevenness at the attachment site, causing rashes. There are safety issues such as size.

In order to improve the drawbacks of organic solvent-based adhesives, it has been proposed to use water-soluble adhesives whose main ingredients are polyvinyl ether, polyvinyl alcohol, and polyvinylpyrrolidone. The adhesive generally has lower adhesive strength than those using the above-mentioned rubber, rosin type, or acrylic resin, and also has extremely weak cohesive force.

However, since it has a high water absorption rate, it may absorb moisture from the atmosphere during use, or when applied to the human body, absorb sweat from the application site or body fluids exuding from wounds, etc., causing softening and swelling. This causes problems such as the attachment position shifting or peeling off after pasting. In addition, this type of water-soluble adhesive has a weak adhesion force to wet surfaces and weak cohesive force, so it has the disadvantage that the adhesive tends to remain on the adherend when it is peeled off.
Furthermore, there are problems that require time and effort to use, such as the need to wet the adhesive with water before use or peeling (rewetting type adhesives, etc.), and the need to wash the adherend with water to remove adhesive residue. There is. In addition, pressure-sensitive adhesive tapes made of adhesives such as water-soluble polyols, water-soluble or water-swellable polymeric substances, and natural rubber have also been proposed (Japanese Patent Publication No. 44688/1983), but these tapes have problems with water absorption. There is.

In view of the above circumstances, the inventors of the present invention have developed a product that has strong adhesive strength, has great adhesive strength not only to dry surfaces, but also to wet surfaces, and has a low water absorption rate, so that it does not absorb moisture in the atmosphere during use. When applied to the human body, it absorbs body fluids and sweat exuding from wounds, etc. It does not soften or cause swelling, and has appropriate moisture permeability, and when applied to the human body, it does not stain the adhesion site. ! It does not cause stiffness, irritation, or redness at the attachment site, and there is no need to use water or the like when removing it, and it can be removed without leaving any residue on the adherend.
In order to obtain an adhesive that is easy to use, a sharp breath test is performed.
As a result, by blending polyacrylic acid, polyacrylate, cellulose derivative, polyhydric alcohol, and polyvalent metal compound, the above objectives were effectively achieved and the problems of conventional water-soluble adhesives were overcome. It was discovered that an aqueous pressure-sensitive adhesive composition with 190% oxidation was released, leading to the invention of the present invention. .

The present invention will be explained in more detail below.

The aqueous pressure-sensitive adhesive composition according to the present invention contains polyacrylic acid, polyacrylate, cell[1-se derivative], polyhydric alcohol, and polyvalent metal compound.

In this case, any -b can be used as the polyacrylic acid, and there are no particular restrictions on its molecular chain and shape, such as linear or branched, but one with a molecular fi of 10,000 to 10 million is used. It is preferable. In addition to polymers obtained by polymerizing ordinary acrylic acid, partially crosslinked acrylic acid polymers such as Carbobol (2) can also be suitably used. In addition, as salts of polyacrylic acid, monovalent metal salts of polyacrylic acid such as sodium polyacrylate and potassium polyacrylate, monoethanolamine polyacrylate,
111 or two or more types such as amine salts of polyacrylic acid such as jetanolamine polyacrylate and triethanolamine polyacrylate, and ammonium salts of polyacrylic acid can be suitably used. Here, the blending ratio (jlffi ratio) of polyacrylic acid and polyacrylate is 1:0.1
~1:10. In particular, the ratio is preferably 1:1 to 1:9, but polyacrylic acid or salt may be partially neutralized to have the above-mentioned ratio of polyacrylate.

In addition, the total content m of polyacrylic acid and polyacrylate is preferably 0.5 to 20% (m ff)% (the same applies hereinafter), particularly 1 to 15%, of the entire composition, and 0.5
%, adhesive strength may be insufficient.2. ．． 0
If the adhesive is more than 10%, the adhesiveness will be reduced, which may cause problems in workability during manufacturing.

In addition, various cellulose derivatives can be used as cellulose derivatives, such as carboxymethyl cellulose alkali metal a
Salt, droxymethyl cellulose, hydroxyethyl cellulose 1. Human C1 xyp1 cobylcellulose, call!
One or more of ζroxypropylethylcellulose and methylcellulose can be used; 1. In particular, carboxymethylcellulose sodium and carboxymethylcellulose potassium metal salts can be preferably used. In addition,
The blending amount of the cellulose derivative is 0.5 to 0.5 of the total composition. 1
5%, especially preferably 1 to 15%, 0.5%
If the amount is less than 1%, the viscosity during production will be low and it may run down when applied to a support (1. If it is more than 20%, the viscosity will be high, which may cause problems in workability during production.

Note that any commonly used polyhydric alcohol can be used, such as glycerin, sorbitol,
One or more of ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol, propylene glycol, polypropylene glycol, 1,3-propanediol, 1,4-butanediol, maltitol, xylitol, etc. can be used. The amount of polyhydric alcohol added is 0.5 to 0.5 of the total composition.

50%, particularly preferably 8 to 40%, 0,5%
If it is less than 5%, the adhesive strength of the product No. 11 may be inferior;
When the amount is more than 0%, the cohesive force decreases, and the adhesive may remain on the adherend upon peeling.

Furthermore, in the present invention, crosslinking is performed by adding a polyvalent metal compound to the polyacrylic wave and the cellulose derivative, and in this case, the polyvalent metal compound includes a magnesium compound, a lucium compound, a zinc compound, and a cadmium compound. , aluminum compounds, titanium compounds, tin compounds, iron compounds, chromium compounds, manganese compounds, cobalt compounds, nickel compounds, etc. can be used, but when applying the adhesive composition to the human body: Aluminum compounds, magnesium compounds,
It is particularly preferable to use a calcium compound or the like.

In this case, any of the aluminum compounds, magnesium compounds, and calcium compounds can be suitably used; for example, alums such as potassium alum, ammonium alum, and iron alum, aluminum hydroxide, aluminum sulfate, aluminum chloride, and aluminum glycol. nate, aluminum acetate, aluminum oxide, aluminum metasilicate, calcium hydroxide, calcium carbonate, calcium sulfate, calcium nitrate, calcium chloride, calcium acetate, calcium oxide, calcium phosphate, magnesium hydroxide, magnesium carbonate absolute - magnesium sulfate, nitrate ÷ magnesium , magnesium chloride, magnesium acetate, synthetic dorotalcite, water-soluble compounds such as double salts containing these metals, and poorly water-soluble compounds may be used. Additionally, ilJIl agents containing aluminum and magnesium can also be used as polyvalent metal compounds. The amount of the polyvalent metal compound is 0% of the entire composition.
, 001 to 10%, especially 0.01 to 5%. If it is less than 0.001%, the cohesive force of the composition may be weakened, and if it is more than 10%, the adhesive force may be reduced. arise. 'In addition to the above-mentioned components, the aqueous adhesive composition of the present invention may further contain gelatin, alginates such as sodium alginate, polymeric substances such as polyethylene oxide, polyvinyl alcohol, and polyvinylpyrrolidone, kaolin, bentonite, and montmorillonite. When the adhesive composition is to be applied to the human body, excipients such as inorganic substances such as benzethonium chloride, benzalkonium chloride, cetylviridinyl chloride, chlorhexidine gluconate, etc. may be added. , disinfectants such as Biozol, naphazoline hydrochloride, F-1 doline hydrochloride, hemostatic agents such as Ebilenamine hydrochloride, local anesthetics such as dibucaine hydrochloride, virocaine hydrochloride, pensicaine, lidocaine, chlorpheniramine maleate, Antihistamines such as diphenhydramine hydrochloride and sodium guaiazulene sulfonate, aloe, icta7al, hinokitiol, glycyrrhetinic acid, glycyrrhizic acid, urea, etc. ff1l 9! Active ingredients such as healing agents and absorbents such as polymeric absorbents and pulp fibers can be added to absorb more exudate from wounds.

The aqueous adhesive composition of the present invention can be suitably used as an adhesive for pressure-sensitive medical adhesive tapes and sheets, such as adhesive tapes, adhesive labels, etc., as described above. Because of this, it has great adhesion to both dry and wet surfaces, and has a low water absorption rate, so the physical properties change depending on the popular wet surface!It does not cause any damage and does not leave any residue on the adherend. An easy-to-use adhesive tape that can be completely peeled off without any problems.
In addition to being able to obtain adhesive labels, it is highly safe and does not cause irritation or redness at the application site, but 01.
It is possible to obtain pressure-sensitive bamboo and medical tenips that do not soften or sag by absorbing body fluids and sweat exuding from the skin, have appropriate moisture permeability, and have a uniform application area. can. In this case, the above-mentioned polyacrylic acid, polyacrylate, cellulose derivative, polyhydric alcohol, polyvalent metal compound, and other components as necessary are mixed with water to prepare the adhesive composition of the present invention. It is applied to woven fabrics, nonwoven fabrics, and synthetic resin films such as polyvinyl chloride, polyethylene, polyester, and polyvinyl alcohol. Here, Mizunobu can account for 10 to 80% of the adhesive composition, and it is also possible to make a product with the above-mentioned adhesive composition applied to the support, but it is possible to make it into a product by heating and drying it. There is no problem in removing or reducing the amount of water by using a filter or leaving it indoors for a specified period of time.

Furthermore, the aqueous adhesive composition of the present invention is suitably used as an adhesive for sanitary pads. In this case, for example, the first to
As shown in FIG. ? 71Il [An acid 2 is usually applied to a thickness of 0.1 to 50%, thereby producing a sanitary acid with good properties. In other words, to prevent the sanitary pad from slipping, it is necessary to add 1% of the adhesive to the sanitary shorts. ? A method of applying ¥1 to a sanitary pad to adhere the adhesive to sanitary shorts, and a method of applying an adhesive similar to that used for bandages, etc. to the skin contact surface of the sanitary pad. There is a method of bonding the adhesive to the skin, but the former method may cause it to shift during exercise, and the latter method uses an oil-based adhesive.
There is also the problem that it can get tangled in body hair, causing pain when removing it. However, when the adhesive composition of the present invention is applied to the skin-contacting surface of a sanitary pad and bonded to the skin, the adhesive composition of the present invention has a high adhesive strength, so that it may not come off during sports. It is very safe, so you won't get a rash, and it won't get tangled in your body hair, so it won't hurt when you remove it.It's also highly absorbent, so it absorbs exudates, and it's highly moisture permeable, so you won't get stuffy. ,
A sanitary pad with extremely good usability can be obtained. In this case as well, the product can be removed with the adhesive composition of the present invention applied to the sanitary pad;
The water can be removed or reduced by heating and drying, or the humidity can be adjusted by leaving it indoors for a specified period of time.

As mentioned above, the aqueous adhesive composition according to the present invention contains polyacrylic acid, polyacrylate, cellulose derivative,
By blending polyhydric alcohol and polyvalent metal compounds, it has strong adhesive force and cohesive force, excellent water resistance, and low safety.

EXAMPLES Hereinafter, the present invention will be specifically explained by showing Examples and Comparative Examples.

[Example 1] Glycerin 20.0 parts by weight Sodium polyacrylate 3.0 Polyacrylic acid 8. OII Carboxymethylcell [J-Suna[・Rium 35. O
n Alum 0.03 〃 65.4771 Total 131.5 parts by weight Glycerin, polyacrylic/If sodium, polyacrylic acid and carboxymethylcellulose sodium] were uniformly dissolved in water, alum was added to lead, and the above A pressure-sensitive adhesive composition of the following composition was obtained. I put this on kraft paper with a solid content of 50? /
After uniformly coating cIF with a thickness of 4T, it was dried at 10°C for 10 minutes using a constant temperature oven, and then allowed to stand at room temperature for 24 hours to produce an adhesive tape. ′ □
゛[*Part side 2] ′ □ Polyacrylic acid 8. Off! Kawabe Sodium acrylate 4.0 Carboxymethyl cellulose sodium gelatin 5.0Il Kaolin 3.0I+ Glycerin 20.0! ! Sorbitol 10. , O n aluminum glycinate 0.5! I water Total 100.0 Φ parts An adhesive composition having the above composition was obtained in the same manner as in Example 1,
Manufactured adhesive tape.

[Example 3] I-lium polyacrylate 2. Olffi part polyacrylic 11! l-liethanolamine 11.0 Il polyacrylic acid 3.0 Sodium carboxymethyl cellulose 4.0 Zinc oxide 1. O Glycerin 85, Q// Aluminum hydroxide 0.3 Total 100.0 parts by weight Adhesive composition of the above composition by the same method as in Example 1 [Comparative Example 1] Polyvinylpyrrolidone □, 10 parts by weight Glycerin ,,'10〃Propylene glycol 5'n''L---21---1112112m L-2-・Total'. , 1. 145mm 1M+each of the above components were mixed and heated and dissolved to obtain an adhesive composition. Using this, an adhesive tape was manufactured in the same manner as in Example 1.

[Comparative Example 2] Polyvinylpyrrolidone 7 parts by weight Polyvinyl alcohol 2 parts! ! Glycerin 9 F+ Propylene glycol 3 〃 0 Total 41 Weight part An adhesive composition having the above composition was obtained in the same manner as in Comparative Example 1,
Manufactured adhesive tape.

Next, the above Examples 1 to 3 and Comparative Examples 1 to 2 cost JPY 31! i
An example of an experiment using the adhesive tape shown below is shown below.

[Experiment Example 1] Initial adhesive strength of each adhesive tape by ball tack method, 18
Adhesive strength, water absorption, releasability, and degree of softening and sagging were examined using the 0° beer test using the following methods. For reference, similar experiments were conducted using a commercially available packing tape using an oil-based adhesive and a commercially available vinyl tape. The results are shown in Table 1.

Attach a length of 100mm adhesive tape with the adhesive side facing up on the slope of a stainless steel plate with a rolling angle of 30°, and attach a stainless steel ball from a position 10cm above the top of the adhesive tape on the slope. The ball with the largest diameter was examined by rolling it at an initial speed of O toward the viscous surface of the tape and stopping on the adhesive tape. Note that 32 types of balls with diameters from 1/32 inch to 1 inch were used.

A phenol plate, a dry glass plate (dry side), and a glass plate soaked in water (FIIa wet side) were used as the adherends, and adhesive tape was applied to the surfaces of these adherends using finger pressure. 18 after 10 minutes at a tensile speed of 300III/min.
The 0° peel strength was measured. J3, the width of the adhesive tape is 2
It was set to 0 mm.

Hajime Kishi stored the adhesive tape in a desiccator for 24 hours, measured the ff1ffi (W+) immediately after taking it out, and then placed it indoors (in a normal atmosphere) for 3 hours.
) was measured, and the water absorption rate was calculated using the following formula.

Water absorption rate (%) = W2-W+ At that time, the ease of peeling off the adhesive tape and the degree of residual adhesive were evaluated according to the following criteria.

○: The detail is easily peeled off, and the adhesive is completely peeled off without remaining.

×: The tape is slightly difficult to peel off, and the adhesive remains slightly.

XX: The tape peeled off and a large amount of adhesive remained.

×××: The tape is extremely difficult to peel off (and an extremely large amount of viscous agent remains.

The softened and sagging adhesive tape was left in an atmosphere at a temperature of 35°C and a humidity of 80% for 5 hours, and the state of the adhesive was evaluated according to the following criteria.

O: Softening and drooping does not occur at all △: Softening and drooping occurs slightly ×: Softening and drooping occurs ××: Softening and drooping occurs significantly From the results in Table 1, it can be seen that the water-based adhesive composition of the present invention was used. The adhesive tapes of Examples 1 to 3 had strong initial adhesive horns, strong adhesion to the phenol plate, dry surface, and wet surface, excellent water resistance, good peelability, and softened and It was recognized that no one could arise. On the other hand, the adhesive tapes of Comparative Examples 1 and 2, which used 7FJ of water-based adhesives such as polyvinylpyrrolidone, had low initial adhesive strength and adhesion to wet surfaces, high water absorption, and poor releasability. Softening and sagging occur, and packing tape and vinyl tape using oil-based adhesives are
There was no contact with the wet surface at all, and the peelability was poor. □ ;: 25 [Example 4] Sodium polyacrylate 2.01mff1% polyacrylic acid 8.0 〃 Carboxymethylcellulose sodium 3. o 〃
Gelatin 3. o Glycerin 20. O〃 Propylene glycol io, o 〃 Sorbitol 5. o〃 Alum 0.03〃 -ni-11111111111111 belly! −
Total: 100.0% by weight The pressure-sensitive adhesive composition having the above composition was uniformly applied to a nonwoven fabric at a ratio of 1/1, and the humidity was adjusted at room temperature day and night to prepare a pressure-sensitive adhesive sheet.

['Example 51 Sodium polyacrylate 1.0 weight f1% polyacrylic acid triethanolamine 2. o Polyacrylic 1
11 5.0 Sodium carboxymethyl cellulose polyvinyl alcohol 1.0 Glycerin 20. O〃 Sorbitol 10.0〃 Polyethylene glycol 3. O 〃 -Water 1--11--111--11211-1-, J
'It-total 100. OiJt and % 150? The adhesive was coated uniformly so that the coating was coated uniformly at 110° C. for 10 minutes, and the humidity was adjusted in a room at night to produce a sticky sheet.

E Example 6] 1% polyacrylic acid for polyacrylic acid 1 helium 2.0 4.0 Crosslinked polyacrylic acid 1.0 Sodium carboxymethyl cellulose 3.0 Sodium oxide 89 6.0 Kaolin 10. 0 Glycerin 25. O Sorbitto 10. O Pyrene Glycol 5. Oll Magnesium metasilicate aluminate 1, Ol! 1 Total: 100.0% by weight The adhesive composition having the above composition was uniformly applied to a nonwoven fabric at a rate of 150 $/I to produce an adhesive sheet.

[Example 7].

Polyacrylic acid triethanolamine 4.0sho f1%
Polyacrylic i11 2.0 Cutlet 1 boxy medile cellulose na!・Rium 3.0
〃Glycerin 30. O Sorbitto 10. Oll Aluminum acetate 0.6 〃 Total 100.0% by weight The above-mentioned crude adhesive was uniformly applied to a non-woven fabric at a rate of 150 $/-dk to produce a pressure-sensitive adhesive sheet.

[Comparative Example 3J Polyvinyl Alcohol 5.01ff1% Polyvinylpyrrolidone 17.0 Glycerin 22. O1l Propylene glycol 7.31/Water 18 Total 1oo, o nail fUt% 150? After drying this at 110° C. for 10 minutes, the humidity was controlled at room temperature day and night to produce an adhesive sheet.

Next, an experimental example using the pressure-sensitive adhesive sheets manufactured in Examples 4 to 7 and Comparative Example 3 will be shown.

[Experiment Example 2J] The initial adhesive force of each adhesive sheet was measured using the ball tack method, the traction force and water absorption rate obtained by the 180° beer test on a phenol plate and a dry glass plate were determined using the same method as in Experiment Example 1. In addition, the degree of pain during peeling of the adhesive sheet, softening of the adhesive, and sagging was also examined using the following method. For reference, a similar experiment was conducted using two types of sticky sheets using an oil-based personal communication agent. The results are not shown in Table 2.

An adhesive sheet was applied to the hairy skin area of the legs of 20 test subjects and peeled off after 7 hours, and the number of people who felt pain at that time was investigated.

During the above-mentioned test for pain during peeling, we investigated the number of people who experienced softening or dripping of the adhesive when using the adhesive sheet.

E-L-1 A 48-hour closed patch test was conducted by 20 healthy men and women, and safety was evaluated according to the following criteria. In addition,
Judgment was made 1 hour after peeling.

-2 No change is observed in the skin.

±: Faint erythema is observed on the skin.

+- Erythema observed on the skin.

From the results in Table 2, adhesive sheets 1 to Examples 4 to 7 using the aqueous adhesive composition of the present invention have strong initial adhesive strength and adhesive horns, low water absorption, and feel pain when peeled. In addition, it did not cause softening or sagging during use, and was recognized to be highly safe. On the other hand, the adhesive tape of Comparative Example 3 using a water-based adhesive such as polyvinylpyrrolidone had a low initial adhesive strength and a high water absorption rate, causing softening and sagging during use. Commercially available adhesive sheets A and B using adhesive
This caused pain when peeled off, and there were also safety issues.

[Example 8] Sodium polyacrylate 3. O weight ffi% polyacrylic acid 5. o Gelatin 5.0! ! Sodium carboxymethylcellulose 2.0 Glycerin 20.0 Sorbitol 10.0u Kaolin 3.0 Potassium alum 0.3 Water Balance 8 Total 100.0% by weight Adhesive composition having the above composition as shown in Figure 1 2 was applied to a sanitary pad to a thickness of 11III11.

"Example 6" Polyacrylic acid triethanolamine 2.5 heavy ffi
% polyacrylic acid 5. o 〃 Crosslinked polyacrylic acid 1, o 〃 Carboxymethylcellulose sodium water absorbent
1. o Aluminum hydroxide 0.5 Glycerin 15. Or! Propylene glycol 5.0 Sorbitol 10.0! ! , total 100.0% by weight Adhesive II or acid having the above composition was applied to the sanitary pad 1 as shown in FIG.

[Example 10] Sodium polyacrylate 3. omm% polyacrylic ill 4. , 5 /r polyvinyl alcohol 2.
0 Carboxymethyl cell bentonite 3.0 Glycerin 15. O11 Polyethylene glycol 5. OIl Sorbit 10. O Aluminum glycinate 0.1J11 - Total 100.0% by weight As shown in FIG. 3, the adhesive composition 2 having the above composition was applied to the sanitary pad 1.

4 in Examples 8 to 10 above! ? These sanitary pads do not come off when you play sports, do not cause pain when you take them off, and do not cause rashes.
It was highly safe. In addition, the sanitary pads of Examples 8 to 10 that were heat-dried to remove moisture from the adhesive, or left overnight to adjust the humidity, had similar effects.

[Brief explanation of the drawing]

1 to 3 are plan views showing sanitary pads each coated with the aqueous adhesive composition of the present invention at predetermined locations on its skin-contacting surface. 1... Sanitary pad,

Claims (1)

[Scope of Claims] 1. Aqueous polyacrylic acid, polyacrylic acid, cell 10-base difluoride, polyhydric alcohol, and polyvalent gold containing a 1X compound. Adhesive composition. □ 2. The aqueous pressure-sensitive adhesive composition according to claim 1, wherein the blending ratio of polyacrylic acid and polyacrylic l\12 salt is 1:0.1 (1:0.1). 3. Characteristic δ' in which the cellulose derivative is an alkali gold Jiri salt of carbo□=1=dimethylcellulose [Aqueous adhesive composition according to claim 1 or claim 2]. ′
4. The polyvalent metal compound is selected from a fluorium compound, a potassium compound, and a magnesium compound.
4! [! X is 2@I! The aqueous adhesive composition according to any one of claims 1 to 3, which is □.