Water-soluble pressure sensitive adhesives
Assignee3M Innovative Properties Company
InventorSteven S. Kantner
Life of this patent
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Abstract
A water-soluble pressure sensitive adhesive comprises a homogeneous blend comprising (a) a polymer selected from the group consisting of N-vinyl caprolactam homopolymers, N-vinyl pyrrolidone copolymers, and mixtures thereof and (b) a non-volatile plasticizer comprising a monohydric or polyhydric alcohol having hydrophilic-lipophilic balance of about 2 to about 10. The N-vinyl pyrrolidone copolymers comprise about 60% or less by weight N-vinyl pyrrolidone.
Claims19
An adhesive comprising a homogeneous blend comprising:
- (a) a polymer selected from the group consisting of N-vinyl caprolactam homopolymers, N-vinyl pyrrolidone copolymers, and mixtures thereof, the N-vinylpyrrolidone copolymers comprising about 60% or less by weight N-vinyl pyrrolidone;
- and
- (b) a non-volatile plasticizer comprising a monohydric alcohol having hydrophilic-lipophilic balance of about 4 to about 9;
- wherein the plasticizer comprises from about 33% to about 80% by weight of the adhesive such that the adhesive is pressure sensitive, water-soluble, and increases in weight less than about 15% after two days at 75% relative humidity and 40° C.
An adhesive comprising a homogeneous blend comprising:
- (a) a polymer selected from the group consisting of N-vinyl caprolactam homopolymers, N-vinyl pyrrolidone copolymers, and mixtures thereof, the N-vinylpyrrolidone copolymers comprising about 60% or less by weight N-vinyl pyrrolidone;
- and
- (b) a non-volatile plasticizer comprising a monohydric alcohol having hydrophilic-lipophilic balance of about 4 to about 9;
- selected from the group consisting of C4-C10 monoesters and ethers of propylene glycol, C4-C10 diesters and ethers of glycerin, C4-C10 alkyl esters of lactic acid, C2-C4 triesters of citric acid, and mixtures thereof, wherein the plasticizer comprises from about 10% to about 80% by weight of the adhesive, such that the adhesive is pressure sensitive, water-soluble, and increases in weight less than about 15% after two days at 75% relative humidity and 40° C.
A method for removing a pressure sensitive adhesive from skin, the method comprising:
- providing a device comprising a flexible backing and the pressure sensitive adhesive disposed on a least a portion of one side of the flexible backing, wherein the pressure sensitive adhesive comprises a homogeneous blend including (a) a polymer selected from the group consisting of N-vinyl caprolactam homopolymers, N-vinyl pyrrolidone copolymers, and mixtures thereof, the N-vinylpyrrolidone copolymers comprising about 60% or less by weight N-vinyl pyrrolidone;
- and (b) a non-volatile plasticizer comprising a monohydric alcohol having hydrophilic-lipophilic balance of about 4 to about 9, wherein the plasticizer comprises from about 10% to about 80% by weight of the adhesive and the adhesive is pressure sensitive and water-soluble, and wherein the pressure sensitive adhesive increases in weight less than about 15% after two days at 75% relative humidity and 40° C.;
- dissolving the pressure sensitive adhesive in water;
- and removing the backing.
Dependencies are inferred from the claim text.