Medical adhesive composition and adhesive tapes or sheets therefrom

A composition and adhesive technology, applied in the direction of adhesive types, ester copolymer adhesives, acid copolymer adhesives, etc., can solve problems such as the influence of adhesion and cohesion

Inactive Publication Date: 2003-04-02
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the adhesiveness and cohesiveness of adhesive compositions are susceptible to elimination effects

Method used

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  • Medical adhesive composition and adhesive tapes or sheets therefrom

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] In a reactor equipped with a condenser, nitrogen conduit, thermometer and stirrer, distilled water (94 parts by weight), surfactant (0.88 parts by weight, reactive emulsifier, produced by Kao Corporation: trade name LATEMUL S180A), (2-ethylhexyl) acrylate (93 parts by weight), acrylic acid (2 parts by weight), methyl methacrylate (10 parts by weight), lauryl mercaptan (0.05 parts by weight) as a chain transfer agent and as a polymerization initiator Ammonium persulfate (0.1 parts by weight) of the additive was mixed, and the emulsified monomer feed polymerization was carried out at a polymerization temperature of 70° C. for about 4.5 hours, followed by aging at 86° C. for 2 hours to complete the copolymerization, thus obtaining Copolymer solution (adhesive composition).

[0053] The adhesive composition was applied onto the surface of a silicone-treated release paper so that the thickness of the adhesive layer was 40 µm, and dried to form an adhesive layer. This copoly...

Embodiment 2 and 3

[0057] In the same manner as in Example 1, except that the composition of the monomer mixture and the amount of the chain transfer agent were changed as shown in Table 1, two kinds of adhesive tapes and adhesive layers were prepared. Comparative example 1-4

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Abstract

The present invention provides a medical adhesive composition containing a copolymer obtained by copolymerization of a monomer mixture containing an acrylic acid alkyl ester having C4-C12 alkyl group, a (meth)acrylic acid, and a methacrylic acid alkyl ester having C1-C4 alkyl group, which mixture is free of a multifunctional monomer having two or more unsaturated double bonds in a molecule, wherein the copolymer has a gel-sol ratio of 35:65 to 55:45 and a weight average molecular weight of the sol portion of 300,000 to 500,000, or a copolymer obtained by copolymerization of the above-mentioned monomer mixture and having a gel fraction of 35 to 55% and a swelling ratio of a gel portion of 50 to 90 times. The medical adhesive of the present invention is superior in the balance between adhesiveness and cohesiveness and can be preferably used for various medical adhesive tapes or sheets.

Description

technical field [0001] The present invention relates to a medical adhesive composition for adhering skin in the fields of medicine and hygiene, and a medical tape or film using the composition. Background technique [0002] Typically, a medical adhesive composition is applied to one side of a substrate as an adhesive layer, and the composition is used by adhering to the skin in the form of a medical tape or film. [0003] For conventional medical adhesive compositions, acrylic adhesives containing alkyl acrylate as a main component and rubber adhesives containing natural rubber and / or synthetic rubber as a main component have been widely used. [0004] However, among the above-mentioned adhesive compositions, the rubber adhesive is rather difficult to handle because it is rather difficult to control its adhesive properties, and in particular, the natural rubber adhesive may cause allergic reactions and the like. Therefore, in recent years, studies on acrylate adhesive compo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K9/70A61L15/58A61L24/06C08F2/24C08F2/38C08F220/12C09J7/02C09J133/02C09J133/06
CPCA61L24/06A61L15/58Y10T428/28Y10T428/2891C08L33/00
Inventor 笠原刚国谷正善佐佐木康行小西贵久
Owner NITTO DENKO CORP
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