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US 4,427,737 AGranted
Microporous adhesive tape
AssigneeE. R. Squibb & Sons, Inc.
InventorsRudolfo D. Cilento, Charles Riffkin, Anthony L. LaVia
Life of this patent
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Abstract
A breathable tape comprising a porous backing layer and a microporous adhesive layer. The adhesive layer includes a rubbery elastomer, one or more water soluble or swellable hydrocolloids, and other optional substances and has a porosity of from about 1 to about 100 cc/sec/in.sup.2.
Claims12
A breathable tape consisting of a porous backing layer and a microporous adhesive layer;
- said adhesive layer comprising from about 30% to about 60% by weight of a rubbery elastomer selected from the group consisting of natural rubber, silicone rubber, acrylonitrile rubber, polyurethane rubber, and polyisobutylene, from about 20% to about 65% by weight of one or more water soluble or water swellable hydrocolloids selected from the group consisting of guar gum, sodium carboxymethylcellulose, cross-linked sodium carboxymethylcellulose, pectin, gelatin, alginic acid, locust bean gum and karaya gum, and up to 35% by weight of one or more tackifiers, plasticizers, antioxidants, and preservatives;
- said adhesive layer being at from about 2 mils to 10 mils in thickness and having a porosity of from about 1 to about 100 cc/sec/in.sup.2.
Dependencies are inferred from the claim text.