Medical pressure-sensitive adhesive mass having a high moisture vapor transmission and a high adhesive strength on dry human skin and in case of intense perspiration

US5785985A · kind A · utility

Assignee

• LOHMANN GMBH & CO. KG · DE

Inventors

• Zbigniew Czech · Koblenz, DE
• Kurt Seeger · Neuwied, DE

Key dates

• Filing date: Nov 13, 1996
• Grant date: Jul 28, 1998
• Expiry date: Nov 13, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09J2301/302
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A medical pressure sensitive adhesive mass having a moisture vapor transmission of at least 10,000 g/m.sup.2 /24.h (measured with a pressure sensitive adhesive film having a weight of 30 g/m.sup.2) and an excellent adhesion to both dry skin and that is moist due to perspiration, comprising: A) a copolymer synthesized from components comprising: PA1 1) 50 to 95%-wt., preferably 70 to 90%-wt., based on the weight of the copolymer, of one or several alkyl esters of acrylic and/or methacrylic acid have 4 to 12 C-atoms in the alkyl residue; and PA1 2) 5 to 50%-wt., preferably 10 to 30%-wt., based on the weight of the copolymer, of a vinylcarboxylic acid, B) 25 to 90%-wt., preferably 50 to 80%-wt., of a hydrophilic emulsifier comprising tertiary or quaternary ammonium groups, C) 15 to 60%-wt., preferably 20 to 40%-wt., of a hydrophilic polyoxyalkylene groups-containing emulsifier which is free from amino groups, D) 1 to 20%-wt., preferably 3 to 15%-wt., of a polyvinylcarboxylic acid, E) 1 to 15%-wt., preferably 3 to 10%-wt., of a tackifying resin, and F) 0.05 to 5%-wt., preferably 0.1 to 2%-wt., of a cross-linking agent. The medical pressure sensitive adhesive mass is useful as sweat ins…