Hydrophilic pressure sensitive adhesives

• US 5,536,768 A
• Filed: 01/05/1996
• Issued: 07/16/1996
• Est. Priority Date: 12/01/1992
• Status: Expired due to Term

• Current Assignee: 3M Company
• Original Assignee: 3M Company
• Inventors: Stefely, James S., Kantner, Steven S., Rustad, Nancy J.
• Primary Examiner(s): Michl, Paul R.
• Assistant Examiner(s): DeWitt, LaVonda R.
• Application Number:
  US08/583,456
• Time in Patent Office: 193 Days
• Field of Search: 523/111, 523/427, 524/376, 524/377, 524/379, 428/355, 427/208.4
• US Class Current: 524/376
• CPC Class Codes: C08L 2666/02 Organic macromolecular compounds, natural resins, waxes or and bituminous materials
• CPC Class Codes: C08L 2666/22 Macromolecular compounds not provided for in C08L2666/16 - C08L2666/20
• CPC Class Codes: C09J 171/00 Adhesives based on polyethers obtained by reactions forming an ether link in the main chain based on polyacetals C09J159/00; based on epoxy resins C09J163/00; based on polythioether-ethers C09J181/02; based on polyethersulfones C09J181/06; Adhesives based on derivatives of such polymers
• CPC Class Codes: C09J 171/02 Polyalkylene oxides
• CPC Class Codes: H01B 1/122 Ionic conductors
• CPC Class Codes: H01B 1/20 Conductive material dispersed in non-conductive organic material organic macromolecular compounds or compositions C08
• CPC Class Codes: H01M 10/052 Li-accumulators
• CPC Class Codes: H01M 10/0565 Polymeric materials, e.g. gel-type or solid-type
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y10S 428/913 Material designed to be responsive to temperature, light, moisture
• CPC Class Codes: Y10T 428/2839 with release or antistick coating
• CPC Class Codes: Y10T 428/2852 Adhesive compositions
• CPC Class Codes: Y10T 428/31504 Composite [nonstructural laminate]

Abstract

A hydrophilic, pressure sensitive adhesive of a poly(ethylene oxide) derived network plasticized with an essentially non-volatile, polar plasticizer present in an amount sufficient to form a cohesive, pressure sensitive adhesive. The polymeric network is prepared from an oligomeric precursor comprising difunctional poly(ethylene glycol) moieties which have been end-capped with ethylenically unsaturation. The adhesive is useful as a biomedical adhesive for transmitting or receiving electrical signals as a component of a biomedical electrode. The adhesive is also useful as a drug delivery device to deliver pharmaceuticals or other active ingredients to or through mammalian skin. The adhesive is also useful as a component in a skin covering for protecting mammalian skin or mammalian skin openings with antimicrobial agents. A method of preparation of the adhesive is also disclosed.

Claims

1. A method of preparing a hydrophilic, pressure sensitive adhesive comprising subjecting a mixture of a difunctional poly(ethylene glycol) oligomeric precursor and an essentially non-volatile polar plasticizer to a source of free radicals to induce free radical polymerization of the oligomeric precursor in the presence of plasticizer to form a hydrophilic poly(ethylene oxide) pressure sensitive adhesive.

2. The method according to claim 1, wherein the subjecting step comprises:

(a) mixing the oligomeric precursor and the plasticizer and a free radical initiator into a mixture;

(b) coating the mixture on a substrate; and

(c) free radically polymerizing the oligomeric precursor in the presence of the plasticizer in situ on the substrate.

3. The method according to claim 2, further comprising optionally mixing an electrolyte, an antimicrobial agent, or a pharmaceutical into the adhesive.