JP2003175072A - Moisture permeable casting tacky adhesive member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a tacky adhesive member which, as a medical member, is attached to a skin surface, has moisture permeability and water resistance, has a good resiliency and does not give rise to itching and rash. <P>SOLUTION: The moisture permeable casting tacky adhesive member comprises applying a polyurethane resin composition obtained from polyol containing polyether polyol having hydroxyl groups at both terminals obtained by copolymerizing ethylene oxide with polyether polyol as an essential component and organic diisocyanate on a releasable base material and drying the coating to form a moisture permeable film consisting of this resin component, then providing a tacky adhesive layer of 15 to 30 μm in thickness on the top thereof. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a moisture-permeable casting pressure-sensitive adhesive member for sticking on skin, and a polyol containing as an essential component a polyether polyol having hydroxyl groups at both ends obtained by copolymerizing ethylene oxide with polyether polyol. And a moisture-permeable casting pressure-sensitive adhesive member to be used by sticking to a human skin surface for medical use, which is obtained by subjecting a moisture-permeable film produced using a polyurethane resin composition obtained from an organic diisocyanate to an adhesive treatment. is there.

[0002]

2. Description of the Related Art When a pressure-sensitive adhesive film member lacking moisture permeability is applied to a human body for medical use, perspiration from the skin causes perspiration to cause insufficient moisture absorption and water absorption of the applied adhesive film member, resulting in itchiness on the skin surface. There is a problem that symptoms such as rash occur.

Conventionally, in this type of application, as a pressure-sensitive adhesive member, a general-purpose film having no moisture permeability, that is, a polyvinyl chloride film, a polyethylene film or the like has been used by making fine holes by machining. Also,
A polyurethane resin having low moisture permeability has been used as a highly moisture permeable film by providing a large number of continuous pores by a wet film forming method.

[0004]

However, there are problems in waterproofness, antibacterial property, etc. in drilling by machining.
Further, in the method of producing a porous film by the wet film forming method, the moisture permeability greatly varies due to the uneven thickness, and the opaque phenomenon of the film cannot be avoided. For this reason, the pressure-sensitive adhesive member obtained by applying an acrylic, rubber-based, or urethane-based pressure-sensitive adhesive to these moisture-permeable coatings has had problems such as waterproofness, antibacterial properties, or opacity for medical use. Under such circumstances, there has been a demand for development of a transparent medical adhesive member having a moisture permeable function.

Up to now, regarding the highly moisture-permeable adhesive sheet used as a medical tape such as a first aid bandage,
JP-A-63-158063, JP-A-7-24049
No. 2000-169609, 2001-1
Many things are disclosed, such as 61741. However, the moisture permeability of these pressure-sensitive adhesive tapes is evaluated by a measuring method using calcium chloride as a moisture absorbent, which is represented by JIS L 1099 calcium chloride method (A-1 method).

The above-mentioned measuring method considers only the movement of gaseous water, and is necessary for an adhesive film or sheet which is originally attached to the skin surface of the human body for use.
It is not evaluated that liquid sweat due to insensitive evaporative generation on the skin surface can absorb and absorb water and then evaporate to the outside. Therefore, the above-mentioned pressure-sensitive adhesive tape absorbs not only gaseous water but also liquid water, and at the same time, has no moisture-permeability with a moisture-absorption / water-absorption effect, and is compatible with low water swelling property. Was not considered until.

When evaluating the above moisture absorption / water absorption performance,
As a typical measurement method in consideration of the ability to move and evaporate water droplets generated on the skin surface and adhered, JIS L 10
Although there is a 99 potassium acetate method (B-1 method), polyurethane adhesive members having a high water vapor permeability by this measuring method always have a problem of high water swelling, and as a result, the human skin surface is affected. When applied, the film itself swelled due to moisture absorption and water absorption, making it unsuitable as an adhesive film and not in practical use.

As a result of intensive studies to solve the above problems, the present invention provides a polyol containing, as an essential component, a polyether polyol having hydroxyl groups at both ends, which is obtained by copolymerizing ethylene oxide with a polyether polyol. , A pressure-sensitive adhesive layer formed on a moisture-permeable film made from a polyurethane-based resin composition obtained from an organic diisocyanate, it is applied to the skin surface of the human body for medical purposes without itchiness or rash, moisture permeability, water resistance The present invention provides a moisture-permeable casting pressure-sensitive adhesive member having properties, low water swelling property, and high elastic recovery rate.

[0009]

The invention according to claim 1 is a polyol containing as an essential component a polyether polyol having hydroxyl groups at both ends, which is obtained by copolymerizing a polyether polyol with ethylene oxide, and an organic diisocyanate. The polyurethane resin composition obtained from the above is coated on a releasable substrate and dried to form a moisture-permeable film of the resin composition, and then a pressure-sensitive adhesive layer having a thickness of 15 to 30 μm is provided thereon. And a moisture permeable casting adhesive member.

In the above claim 1, the moisture permeable film made of the polyurethane resin composition preferably has a thickness of 15 to 150 μm, and the moisture permeable casting adhesive member obtained by the invention of claim 1 is JIS L 1099.
Moisture permeability by the potassium acetate method (B-1 method) is 1400 to
It is characterized by having water resistance in the range of 6000 g / m ² · 24 h and a water swelling rate in the range of 0 to 5%, and an elastic recovery rate at 90% elongation of 90% or more.

According to the first aspect of the present invention, a polyol containing, as an essential component of the polyol, a polyether polyol having hydroxyl groups at both ends, which is obtained by copolymerizing a polyether polyol with ethylene oxide, and an organic diisocyanate. Using the polyurethane resin composition obtained by forming a moisture-permeable film to be the base of the adhesive member,
A moisture-permeable casting pressure-sensitive adhesive member having a pressure-sensitive adhesive layer provided thereon, which is completely different from the conventional method of forming fine pores by mechanical machining or wet film formation to form a moisture-permeable film. To obtain a moisture permeable film. As a result, the moisture permeability according to JISL 1099 (B-1 method) was 1400 to 6000 g / m ² · 24 h, and the water swelling rate was 0.
It is possible to obtain a moisture permeable casting pressure-sensitive adhesive member having excellent water resistance in the range of up to 5% and an elastic recovery rate at 30% elongation of 90% or more.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The polyurethane resin composition used in the present invention is generally called a polyurethane resin or polyurethane urea resin, and has an average molecular weight of 40.
0 to 5000 polyalkylene ether glycol, polyester polyol having hydroxyl group at terminal, poly ε-
Caprolactone polyol, polycarbonate diol, etc., or a mixture thereof is reacted with an organic diisocyanate and, if necessary, chain-extended with a compound having two active hydrogens in the molecule. As an essential component, a polyether polyol having an average molecular weight of 400 to 5000 and having hydroxyl groups at both ends, which is obtained by copolymerizing ethylene oxide with polytetramethylene ether glycol, polypropylene glycol or the like is used.

As the above-mentioned polyalkylene ether glycol, polytetramethylene ether glycol, polypropylene glycol, glycerin propylene oxide adduct, vinyl monomer grafted polyether polyol and the like are used.

As the polyester polyol, ethylene glycol, propylene glycol, butylene glycol, hexylene glycol, diethylene glycol,
React alkylene glycols such as dipropylene glycol and neopentyl glycol with carboxylic acids such as succinic acid, adipic acid, sebacic acid, maleic acid, fumaric acid, terephthalic acid, and isophthalic acid so that the terminal is hydroxyl. What is obtained is suitable.

As the organic diisocyanate, 2,4-
Or 2,6-tolylene diisocyanate (TDI),
4,4'-diphenylmethane diisocyanate (MD
I), isophorone diisocyanate (IPDI), 4,
4'-dicyclohexylmethane diisocyanate (H ₁₂
MDI) or the like may be used alone or in combination as necessary.

In the reaction of the above-mentioned polyol and organic diisocyanate, if necessary, in addition to a single chain glycol represented by ethylene glycol, propylene glycol and butylene glycol, ethylenediamine,
Diamines such as 4,4′-diaminodicyclohexylmethane, hydrazine and piperazine can be used alone or in combination as a chain extender.

As the organic solvent, dimethylformamide (DMF), dimethylacetamide, methyl ethyl ketone (MEK), acetone, toluene, xylene, dioxane, tetrahydrofuran, ethyl acetate, butyl acetate,
Isopropyl alcohol, N-methylpyrrolidone, etc. are appropriately mixed and used.

In the present invention, in obtaining the polyurethane resin which is the main resin, in addition to the polyether polyol having hydroxyl groups at both ends obtained by copolymerizing ethylene oxide with polyether polyol as an essential component, Polymeric resins such as acrylic resins, epoxy resins, cellulosic resins, olefinic resins, and fluororesins are mixed within a range that does not impair the features of the present invention such as moisture permeability, water resistance, water swelling rate, and elastic recovery rate. Alternatively, these monomers may be added for copolymerization or graft polymerization.

In obtaining the polyurethane resin composition, if necessary, an antioxidant (phosphorus compound such as triphenyl phosphate), an inorganic or organic filler (silica, polyurethane crosslinked fine particles, etc.), It is also possible to add a wax, an antistatic agent, a cross-linking agent (polyisocyanate, aminoplast, etc.) and the like.

The polyurethane resin composition thus obtained was made into an organic solvent solution having a concentration of 10 to 40%, and then applied on a releasable substrate with a comma doctor, knife coater or the like,
When it is dried at 100 to 150 ° C, it has moisture permeability and water resistance as a base of the moisture permeable casting adhesive member of the present invention, and at the same time has a low water swelling rate and a high elastic recovery rate, and is highly flexible. However, a moisture permeable polyurethane film can be obtained. When this film is used for medical purposes, the thickness after drying is 15 to 150 μm, preferably 15
-100 μm is suitable. If it is thinner than 15 μm, the strength as a medical film is insufficient, and it is 150 μm.
This is because if the thickness is thicker, the water vapor permeability is reduced and it is not suitable for practical use.

As the pressure-sensitive adhesive for forming the pressure-sensitive adhesive layer on the moisture-permeable polyurethane film, an acrylic resin, a urethane resin, or a synthetic rubber resin is used to improve the adhesiveness with the polyurethane film. , Tolylene diisocyanate (TDI), Xylylene diisocyanate (XD
I), organic diisocyanates such as isophorone diisocyanate (IPDI), tackifiers such as petroleum-based rosin, butyl rubber, acrylic polymers and ester gums are preferably used, and the amount thereof is 100
2 to 10 parts by weight is suitable with respect to parts by weight.

In order to improve the moisture permeability, hydrophilic silica powder, collagen powder, gelatin powder, hydrophilic organic crosslinked granules (for example, polyacrylic powder containing acrylic acid) are added to 100 parts by weight of the adhesive. Alternatively, 5 to 40 parts by weight may be mixed.

The thickness of the pressure-sensitive adhesive layer formed of the above-mentioned pressure-sensitive adhesive is 15 to
30 μm, preferably 15-22 μm, JIS
Water vapor permeability according to L 1099 (B-1 method) is 1400 to
It is preferably 6000 g / m ² · 24 h. If the thickness of the pressure-sensitive adhesive layer is less than 15 μm, the pressure-sensitive adhesive force may decrease even if the moisture permeability is within the above range.
This is because when the thickness is more than 30 μm, the moisture permeability falls below the above range and the moisture permeability is lacking. Further, since the moisture permeability greatly differs depending on the type of adhesive used, it is also necessary to change the thickness of the adhesive layer according to the type of adhesive used.

The pressure-sensitive adhesive layer formed of the above-mentioned pressure-sensitive adhesive is not formed on the entire surface by using a comma doctor, knife coater or the like on the moisture-permeable polyurethane film, but is formed on the entire surface by pattern coating. It may be formed in a dot shape (non-continuous film). The dot-like (discontinuous film) formation can be performed by screen coating, gravure coating, or the like.

The pressure-sensitive adhesive layer may be formed by directly coating the pressure-sensitive adhesive on the moisture-permeable polyurethane film as described above, or by coating the pressure-sensitive adhesive on a releasable substrate and drying it to form a laminating system. It is also possible to form by a method of transferring onto the moisture-permeable polyurethane film.

The moisture-permeable casting pressure-sensitive adhesive member according to the present invention thus obtained has a total thickness of 30 to 180 μm.
Then, JIS L 1099 potassium acetate method (B-1 method)
Has a water vapor transmission rate of 1400-6000 g / m ² · 24h,
It has an excellent performance that the water swelling rate is 0 to 5% and the elastic recovery rate at 30% elongation is 90% or more, and no itch or rash is observed even 48 hours after being attached to the skin surface. It was

The moisture-permeable casting pressure-sensitive adhesive member of the present invention is used for medical purposes after it is formed into an arbitrary shape in a state where a release paper having good releasability is attached to the surface of the pressure-sensitive adhesive layer and then sterilized. For small shapes, a release paper with good releasability may be attached to the adhesive surface of the adhesive member, and the releasable base material on the moisture-permeable polyurethane film side, which is the base, may be removed and sterilized. .

[0028]

EXAMPLES The present invention will be described in detail below with reference to examples, but the present invention is not limited to these examples. All parts in the examples are parts by weight.

Example 1 (1) Production of moisture-permeable polyurethane resin solution Polytetramethylene ether glycol having an average molecular weight of 3000 as a polyol component was copolymerized with ethylene oxide groups in an equal amount and had hydroxyl groups at both ends. 420 parts of polyether polyol, 160 parts of polyethylene glycol having an average molecular weight of 1000, and 105 parts of ethylene glycol as a hardness adjusting agent are weighed in a reaction vessel, and 1500 parts of DMF and 300 parts of toluene are added to 70 to 8 parts.
The reaction was carried out while adding 500 parts of MDI little by little while stirring at 0 ° C. The viscosity of the reaction solution is 100 at 40% concentration.
Immediately after the temperature reached 00 mPa · s / 30 ° C, 5 parts of methanol was added to stop the reaction to obtain a moisture-permeable polyurethane resin solution.

(2) Production of pressure-sensitive adhesive 100 parts of acrylic resin (Crisbon 7367-SL manufactured by Dainippon Ink and Chemicals, Inc.), 60 parts of synthetic rubber (Kraton Thermoplastic Rubber manufactured by Shell Chemical Co., Ltd.),
20 parts of natural rosin (KE707 manufactured by Yasuhara Yushi Co., Ltd.) and 35 parts of silica powder (OK-412 manufactured by Digussa) are weighed in a mixing container and stirred at room temperature for about 40 minutes, and then T
3 parts of DI was added and stirred for 2 hours. Next, the resin solution was diluted with a 60/40 mixed solvent of ethyl acetate / toluene so that the solid content was 40%, and the solution viscosity was 1800.
An adhesive of mPa · s / 30 ° C was obtained.

(3) Preparation of moisture-permeable pressure-sensitive adhesive member The moisture-permeable polyurethane resin solution obtained in (1) above was placed on a release paper (EKW-78TPD manufactured by Lintec Co., Ltd.) so that the film thickness after drying was 15 μm. Apply and apply 2 at 80 ° C
After that, it was dried at 130 ° C. for 4 minutes to obtain a moisture-permeable film made of polyurethane resin. Separately, the above (2)
Using the release paper as a release paper, the pressure-sensitive adhesive obtained in 1 is applied onto the release paper so that the film thickness after drying is 15 μm,
It dried at 70 degreeC for 4 minutes, and obtained the adhesive sheet. next,
The 15 μm-thick moisture-permeable polyurethane resin film obtained above and the 15 μm-thick pressure-sensitive adhesive sheet were pressure-bonded using a laminator under the condition of 2.0 kg / cm ² at room temperature to give a total thickness of 30 μm moisture-permeable casting. An adhesive member was obtained.

Example 2 The pressure-sensitive adhesive obtained in Example 1 was applied to the same release paper used in Example 1 using a gravure printer having 16 mesh dots so that the film thickness after drying would be 20 μm. ,
A discontinuous pressure-sensitive adhesive sheet was obtained by drying at 70 ° C for 4 minutes.
Then, this discontinuous pressure-sensitive adhesive sheet and 15 obtained in Example 1 were used.
1. A water vapor permeable polyurethane resin film with a thickness of μm at room temperature 2.
It was laminated under the condition of 0 kg / cm ² and pressure-bonded to obtain a moisture-permeable casting pressure-sensitive adhesive member having a total thickness of 35 μm.

Example 3 (1) Production of moisture-permeable polyurethane resin solution Polytetramethylene ether glycol having an average molecular weight of 1800 as a polyol component was copolymerized with ethylene oxide groups in an equimolar ratio and had hydroxyl groups at both ends. Polyether polyol 1060 parts, polypropylene glycol 2 having a hydroxyl group at both ends obtained by copolymerizing ethylene glycol with polypropylene glycol in a molar ratio of 30% 2
00 parts, ethylene glycol 80.6 as a hardness modifier
Parts were weighed into a reaction vessel, and 1380 parts of DMF, 690 parts of toluene and 690 parts of MEK were added thereto to obtain 70-80 parts.
The reaction was carried out while adding 500 parts of MDI little by little while stirring at ° C. Viscosity of reaction solution is 1300 at 40% concentration
Immediately after reaching 0 mPa · s / 30 ° C., 3 parts of methanol was added to stop the reaction to obtain a moisture-permeable polyurethane resin solution.

(2) Preparation of moisture-permeable pressure-sensitive adhesive member The moisture-permeable polyurethane resin solution obtained in the above (1) was placed on a release paper (EKW-78TPD manufactured by Lintec Co., Ltd.) so that the film thickness after drying was 40 μm. Apply and apply 2 at 80 ° C
After that, it was dried at 130 ° C. for 4 minutes to obtain a moisture-permeable film made of polyurethane resin. Next, the 20 [mu] m-thick discontinuous pressure-sensitive adhesive sheet obtained in Example 2 was laminated on this moisture-permeable film under the same conditions as in Example 2 and pressure-bonded to obtain a moisture-permeable casting pressure-sensitive adhesive member having a total thickness of 60 [mu] m. .

Example 4 (1) Preparation of moisture-permeable polyurethane resin solution Polytetramethylene ether glycol having an average molecular weight of 3,000 as a polyol component was copolymerized with ethylene oxide groups in an equal amount in a molar ratio and had hydroxyl groups at both ends. 900 parts of polyether polyol, 43.4 parts of ethylene glycol as a hardness adjusting agent, and 444 parts of isophorone diisocyanate were weighed in a reaction vessel, and 110-120
Stir for about 3 hours at ° C. After that, DMF1226 part,
After adding 613 parts of toluene and 613 parts of MEK for dilution, the reaction was carried out while adding 170 parts of isophoronediamine little by little. Viscosity of reaction solution is 20,000 at 40% concentration
Immediately after reaching mPa · s / 30 ° C., 3 parts of methanol was added to stop the reaction, and then 77.9 parts of acrylic resin was further added and dissolved to obtain a moisture permeable polyurethane resin solution.

(2) Preparation of moisture-permeable pressure-sensitive adhesive member The moisture-permeable polyurethane resin solution obtained in the above (1) was placed on release paper (EKW-78TPD manufactured by Lintec Co., Ltd.) so that the film thickness after drying would be 130 μm. Apply and apply 2 at 80 ° C
After that, it was dried at 130 ° C. for 4 minutes to obtain a moisture-permeable film made of polyurethane resin. Next, a non-continuous pressure-sensitive adhesive sheet having a thickness of 15 μm obtained in the same manner as in Example 2 was laminated on this moisture-permeable film under the same conditions as in Example 2 and pressure-bonded to give a moisture-permeable casting pressure-sensitive adhesive member having a total thickness of 145 μm. Got

Comparative Example 1 A moisture-permeable polyurethane resin film having a thickness of 10 μm was produced in the same manner as in Example 1, and this film and a non-continuous pressure-sensitive adhesive sheet having a thickness of 20 μm obtained in the same manner as in Example 2 were used in Examples. Laminated under the same conditions as 2 and pressure-bonded to obtain a moisture-permeable casting pressure-sensitive adhesive member having a total thickness of 30 μm.

Comparative Example 2 A moisture-permeable polyurethane resin film having a thickness of 160 μm was produced in the same manner as in Example 1, and this film and a non-continuous pressure-sensitive adhesive sheet having a thickness of 20 μm obtained in the same manner as in Example 2 were used in Example. Laminated under the same conditions as in 2 and pressure-bonded to obtain a moisture-permeable casting pressure-sensitive adhesive member having a total thickness of 180 μm.

Comparative Example 3 1100 parts of polyethylene glycol having an average molecular weight of 2000 as a polyol component, 300 parts of butylene adipate having an average molecular weight of 2000, and 80.6 parts of ethylene glycol as a hardness adjusting agent were weighed into a reaction vessel, and DMF1 was added thereto.
The reaction was carried out while adding 485 parts, 743 parts of toluene, and 743 parts of MEK and adding 500 parts of MDI little by little while stirring at 70 to 80 ° C. When the viscosity of the reaction solution reached 16000 mPa · s / 30 ° C. at a concentration of 40%, 5 parts of methanol was immediately added to stop the reaction to obtain a moisture permeable polyurethane resin solution.

The moisture-permeable polyurethane resin solution obtained above was placed on a release paper (manufactured by Lintec Co., Ltd., EKW-78TPD).
Apply so that the film thickness after drying is 40 μm, and apply at 80 ° C.
For 2 minutes and then at 130 ° C. for 4 minutes to obtain a moisture-permeable film made of the polyurethane resin. Next, a 20 μm-thick discontinuous pressure-sensitive adhesive sheet obtained in the same manner as in Example 2 was laminated on the moisture-permeable film under the same conditions as in Example 2 and pressure-bonded to give a moisture-permeable casting pressure-sensitive adhesive member having a total thickness of 60 μm. Got

Various physical properties of the moisture-permeable casting pressure-sensitive adhesive members obtained in Examples 1 to 4 and Comparative Examples 1 to 3 were measured, and the results shown in Table 1 were obtained.

[0042]

[Table 1]

The above-mentioned physical properties were measured by the following methods. (A) Water vapor transmission rate: Measured according to JIS L 1099 potassium acetate method (method B-1). (B) Water swelling ratio: The sample was cut into a length of 50 mm and a width of 50 mm, immersed in water (23 ° C ± 3 ° C) for 1 hour, and then the length and width of the sample piece were measured. The water swelling rate was determined in accordance with. Water swelling rate (%) = [(measured length-50 mm) / 50 m
m] × 100 (c) Water pressure resistance: Measured according to JIS L 1092 B method (high water pressure method). (D) Elastic recovery rate: A sample was cut into a width of 10 mm, a chuck interval was set to 30 mm, and a tensile tester (AGS-10 was used.
0A, manufactured by Shimadzu Corporation). 200 mm / mi
The length after the sample piece was stretched by 30% was measured by pulling at a constant speed of n, and the elastic recovery rate was obtained according to the following calculation formula. Elastic recovery rate (%) = [30 mm- (measured length -30 m
m) / 30 mm] × 100 (e) Presence / absence of itch / rash: A moisture-permeable casting adhesive member sheet was attached to the skin of a human body, and the presence / absence of itch / rash was evaluated after 48 hours. (F) Surface Strength: The moisture permeable casting pressure-sensitive adhesive member sheet was attached to the palm of a human body and rubbed 20 times in a state where the hands were in contact with each other, and the damage state of the moisture permeable casting pressure-sensitive adhesive sheet was evaluated as follows. ◯: No damaged part ×: Partial or entire surface damaged.

From Table 1 above, Comparative Examples 1 and 2 are made of the same material as the pressure-sensitive adhesive member of the present invention, but the pressure-sensitive adhesive member of Comparative Example 1 is a moisture-permeable polyurethane film formed thinly. Although it has high moisture permeability, it is inferior in water pressure resistance and surface strength, and the pressure-sensitive adhesive member of Comparative Example 2 was formed by forming a moisture-permeable polyurethane film with a thickness larger than the range of the present application, and was inferior in moisture permeability. Further, Comparative Example 3 is a film of a polyurethane resin made of a polyol other than the essential one in the present invention, and although the water vapor transmission rate was good, the water swelling rate was high and the surface strength was poor. On the other hand, the pressure-sensitive adhesive members obtained in Examples 1 to 4 had good results in terms of moisture permeability, water swelling rate, and the like.

[0045]

As described above, the moisture-permeable casting pressure-sensitive adhesive member of the present invention contains, as an essential component of a polyol, a polyether polyol having hydroxyl groups at both ends obtained by copolymerizing ethylene oxide with a polyether polyol. With a polyol to be used, an organic diisocyanate and a polyurethane resin composition having excellent moisture permeability, which is obtained, is used to form a moisture-permeable film as a base of an adhesive member, and a pressure-sensitive adhesive layer is provided thereon. , Moisture permeability is 14
00-6000g / m ² · 24h, water swelling rate 0-5%
In addition to having water resistance in the range of, the elastic recovery rate at 30% elongation is 90% or more, and it has excellent flexibility,
It was confirmed that it is useful for medical use because of its good adhesion to the human skin surface.

Claims (3)

[Claims] 1. A polyol containing, as an essential component, a polyether polyol having hydroxyl groups at both ends, which is obtained by copolymerizing a polyether polyol with ethylene oxide.
A polyurethane resin composition obtained from an organic diisocyanate is coated on a releasable substrate and dried to form a moisture-permeable film of the resin composition, and then 15 to 3 is formed thereon.
A moisture-permeable casting pressure-sensitive adhesive member, which is provided with a pressure-sensitive adhesive layer having a thickness of 0 μm. 2. The moisture-permeable casting pressure-sensitive adhesive member according to claim 1, wherein the moisture-permeable film made of the polyurethane resin composition has a thickness of 15 to 150 μm. 3. The moisture-permeable casting pressure-sensitive adhesive member thus obtained has a moisture permeability according to JIS L 1099 potassium acetate method (B-1 method) of 1400 to 6000 g / m ² · 24 h and a water swelling rate of 0 to 5%. Water resistant and 30
The moisture-permeable casting pressure-sensitive adhesive member according to claim 1 or 2, wherein the elastic recovery rate in% elongation is 90% or more.