Water-soluble pressure-sensitive skin adhesive, its use, and agents provided with it
AssigneeRohm GmbH Chemische Fabrik
InventorsHelmut Beier, Hans-Ulrich Petereit, Gunter Bergmann
Life of this patent
Estimating the term…
Abstract
A salt of an uncrosslinked copolymer of a monoethylenically unsaturated mono- or dicarboxylic acid and an alkyl ester of acrylic or methacrylic acid is suitable as a pressure-sensitive skin adhesive for plasters, for transdermal pharmaceutical forms, or for fastening bandages, which is permanently flexible and can be washed off with water, for which the proportion of carboxylic acid has to be sufficient to make the copolymer water-soluble in the salt form.
Claims18
A method of applying a permanently flexible pressure-sensitive skin adhesive coating to a substrate from which it is removable by washing with water, which consists essentially of the steps of coating said substrate with a layer of an aqueous solution consisting essentially of water and a salt of an uncrosslinked copolymer of:
- (a) a monoethylenically unsaturated mono- or dicarboxylic acid that can be polymerized by a free radical mechanism and
- (b) at least one alkyl ester of (meth)acrylic acid, wherein the copolymer contains such a portion of said unsaturated mono- or dicarboxylic acid that it is water soluble in the salt form, and drying said coated layer to form a pressure-sensitive coating.
A method of applying a permanently flexible pressure-sensitive skin adhesive coating to a substrate from which it is removable by washing with water, which consists essentially of the steps of coating said substrate with a layer of an aqueous solution consisting essentially of water, at least one organic plasticizer and a salt of an uncrosslinked copolymer of
- (a) a monoethylenically unsaturated mono- or dicarboxylic acid that can be polymerized by a free radical mechanism and
- (b) at least one alkyl ester of (meth)acrylic acid wherein the copolymer contains such a portion of said unsaturated mono- or dicarboxylic acid that it is water soluble in the salt form, and drying said coating layer to form a pressure-sensitive coating.
A method of applying a permanently flexible pressure sensitive skin adhesive coating to a substrate from which it is removable by washing with water, which consists essentially of the steps of coating said substrate with a layer of an aqueous solution consisting essentially of water, a topical or systemic pharmaceutical ingredient and a salt of an uncrosslinked copolymer of:
- (a) a monoethylenically unsaturated mono- or dicarboxylic acid that can be polymerized by a free radical mechanism and
- (b) at least one alkyl ester of (meth)acrylic acid, wherein the copolymer contains such a portion of said unsaturated mono- or dicarboxylic acid that it is water soluble in the salt form, and drying said coated layer to form a pressure-sensitive coating.
Dependencies are inferred from the claim text.