3m Innovative Properties Company

Gregory J Anderson

Albert I Everaerts

Brant Ulrick Kolb

Michael A Kropp

James M Jonza

Joseph D Rule

David R Holm

Kevin M Eliason

Jaime B Willoughby

Jennifer N Hanson

Scott B Charles

Gustavo H Castro

Döne Demirgöz

Kejian Chen

John P Banovetz

James K Young

Raha A Been

Matthew J Younker

Diana M Eitzman

Döne DEMIRGÖZ

Douglas J Smith

Jack J Iii Williams

A viscoelastic wound closure dressing. The dressing can include a viscoelastic backing having a first major surface configured to face skin when in use, a first end, a second end, and a middle section located between the first end and the second end. The wound closure dressing can further include a skin-contact adhesive on the first major surface of the viscoelastic backing adjacent the first end and the second end. A majority of the first major surface of the middle section can be free of the skin-contact adhesive. The viscoelastic backing can recover, at room temperature: (i) no more than 40% of its deformation after 10 seconds, after being strained to 50% elongation for 30 minutes, and (ii) at least 70% of its deformation after 48 hours, after being strained to 50% elongation for 30 minutes.

Viscoelastic wound closure dressing

Methods, systems, and compositions that make it possible to form high resolution, pressure sensitive adhesive patterns or films on a wide range of substrates. The compositions generally incorporate a curable, fluid composition (i.e., pressure sensitive adhesive precursor). When cured, a pressure sensitive adhesive is formed. Ink jet printing and subsequent curing allows pressure sensitive adhesive features to be formed with high resolution and tremendous flexibility in the patterns by which adhesive features may be formed. Preferred embodiments of the invention incorporate rheology modifying agents that can be used to promote favorable dot gain and other printing characteristics, the ability to build print thickness, and mechanical properties of resultant cured adhesives.

Methods and compositions for ink jet printing of pressure sensitive adhesive patterns or films on a wide range of substrates

This invention relates to a polyimide hybrid adhesive comprised of an epoxy component, an epoxy curing agent, and a polyimide oligomer of molecular weight of up to about 8,000 (M,) having repeating units of Formula (1):

Polyimide hybrid adhesives

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Stillwater, MN, United States of America

Gregory J Anderson