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US 4,044,761 AGranted
Orthopedic bandage
AssigneeSmith & Nephew Research Limited
InventorJohn Ives Hall
Life of this patent
Estimating the term…
Abstract
A casting or splinting material in powder form is a mixture of particles of (a) a water-soluble cross-linkable polymer containing carboxylic acid groups, such as polyacrylic acid and (b) zinc oxide and/or one or more zinc salts, this latter material being at least partly coated to reduce its surface reactivity with an organic acid e.g. an aliphatic fatty acid containing from 6 to 20 carbon atoms per molecule. Such material, that can for example be provided as a loading on a Leno gauze, can be made up as a slurry in a volatile organic liquid for coating purposes.
Claims12
An orthopedic bandage which comprises:
- a carrier, and
- a water-hardenable powder material loaded on said carrier, said water-hardenable powder material comprised of a mixture of particles of (a) a water-soluble cross-linkable polymeric material containing carboxylic acid groups, and (b) at least one material selected from the group consisting of zinc oxide and zinc salts with at least one weak acid, said at least one material having been at least partially coated with an organic acid to reduce its surface reactivity.
Dependencies are inferred from the claim text.