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EP0369092A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Dermal pressure-sensitive adhesive sheet material

Assignee: Nitto Denko Corp
•
Filing: 1989-02-10
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Granted: —
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Expires: 2009-02-10
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Abstract

Abstract A dermal pressure-sensitive adhesive sheet material which comprises a backing having provided on one side thereof a pressure-sensitive adhesive layer is disclosed, in which said pressure-sensitive adhesive layer contains a copolymer comprising from 40 to 80% by weight of an alkyl acrylate or methacrylate monomer, from 10 to 50% by weight of an alkoxyl-containing ethylenically unsaturated monomer, and from 1 to 10% by weight of a carboxyl-containing ethylenically unsaturated monomer and having a glass transition point of 250°K or lower and a gel fraction after drying of 25% or more. The dermal pressure-sensitive adhesive sheet material causes no irritation to the skin, behaves like the skin as having low modulus of elasticity, and exhibits high moisture-­permeability and excellent resistance to bacteria and water.

Inventors

  • 👤 Tetsuji Sugii
  • 👤 Shintaro Wada
  • 👤 Masayuki Konno

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-27 07:29
CPC Classifications
A; A61; A61L; A61L31/00; A61L31/04; A61L31/048; A61L15/00; A61L15/16; A61L15/22; A61L15/26; A61L15/42; A61L15/58; A61L31/06

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 87 words
A dermal pressure-sensitive adhesive sheet material which comprises a backing having provided on one side thereof a pressure-sensitive adhesive layer, wherein said pressure-sensitive adhesive layer contains a copolymer comprising from 40 to 80% by weight of an alkyl acrylate or methacrylate monomer, from 10 to 50% by weight of an alkoxyl-containing ethylenically unsaturated monomer, and from 1 to 10% by weight of a carboxyl-­containing ethylenically unsaturated monomer and having a glass transition point of 250°K or lower and a gel fraction after drying of 25% or more.
Claim 2
Dependent Claim 87 words
A dermal pressure-sensitive adhesive sheet material which comprises a backing having provided on one side thereof a pressure-sensitive adhesive layer, wherein said pressure-sensitive adhesive layer contains a copolymer comprising from 40 to 80% by weight of an alkyl acrylate or methacrylate monomer, from 10 to 50% by weight of an alkoxyl-containing ethylenically unsaturated monomer, and from 1 to 10% by weight of a carboxyl-­containing ethylenically unsaturated monomer and having a glass transition point of 250°K or lower and a gel fraction after drying of 25% or more.
Claim 3
Dependent Claim 37 words
A dermal pressure-sensitive adhesive sheet material as claimed in claim 1, wherein said pressure-­sensitive adhesive layer has a moisture-permeability of 1,000 g/m² or more and said adhesive sheet material has a moisture-permeability of 800 g/m² or more.
Claim 4
Dependent Claim 34 words
A dermal pressure-sensitive adhesive sheet material as claimed in claim 1, wherein said backing has a tensile strength of from 100 to 500 kg/cm² and a 100% modulus of from 10 to 100 kg/cm²
Claim 5
Dependent Claim 69 words
A dermal pressure-sensitive adhesive sheet material as claimed in claim 1, wherein said backing comprises a polyether-polyamide block copolymer represented by formula: wherein A represents a polyamide component selected from the group consisting of nylon 6, nylon 6.6, nylon 10, nylon 11, and nylon 12; B represents a polyether component selected from the group consisting of polyethylene glycol, polypropylene glycol, and polytetramethylene glycol; and n represents a positive integer.

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