EP0322098A1
Expired / Lapsed
EP
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Pressure-sensitive adhesives and bioelectrodes constructed with the adhesive
Assignee: 3M Co
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Filing: 1988-11-10
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Granted: —
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Expires: 2008-11-10
Abstract
Abstract Hydrophilic, cohesive, pressure-sensitive adhesive compositions are provided comprising a) a crosslinked, swellable polymeric matrix made from an N-vinyl lactam monomer and a multi-ethylenically unsaturated compound, wherein the ethylenic groups are vinyl groups, allyl groups, and/or methallyl groups, which groups are bonded to nitrogen or oxygen atoms, and b) a plasticizer for the copolymer wherein the amount of the multi-ethylenically unsaturated compound and the plasticizer are present in amounts sufficient to render the polymeric matrix cohesive, swellable and pressure-sensitive adhesive. These compositions can also be used as adhesives for biomedical electrodes and transdermal drug delivery systems.
Inventors
- 👤 Daniel C. C/O Minnesota Mining And Duan
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 07:09
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/70; A61K9/7023; A61K9/703; A61K9/7038; A61K9/7046; A61K9/7053; A61B; A61B5/00; A61B5/24; A61B5/25; A61B5/251; A61B5/257; A61B5/259; A61L; A61L15/00; A61L15/16; A61L15/20; A61L15/42; A61L15/58; A61L15/60; C; C08; C08F; C08F226/00; C08F226/06; A61B5/279; A61B5/28
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
87 words
A hydrophilic, pressure-sensitive adhesive composition comprising: a crosslinked, swellable polymeric matrix formed by a free-radical polymerization of at least one polymerizable monomeric species wherein a majority of the monomeric component is comprised of one or more N-vinyl lactams, and a crosslinker which is a multi-ethylenically unsaturated compound with the ethylenic groups being vinyl, allyl, or methallyl groups bonded to nitrogen or oxygen atoms; and a plasticizer; wherein the crosslinker and the plasticizer are present in amounts sufficient for the composition to be cohesive, swellable and pressure-sensitive adhesive.
Claim 2
Dependent Claim
87 words
A hydrophilic, pressure-sensitive adhesive composition comprising: a crosslinked, swellable polymeric matrix formed by a free-radical polymerization of at least one polymerizable monomeric species wherein a majority of the monomeric component is comprised of one or more N-vinyl lactams, and a crosslinker which is a multi-ethylenically unsaturated compound with the ethylenic groups being vinyl, allyl, or methallyl groups bonded to nitrogen or oxygen atoms; and a plasticizer; wherein the crosslinker and the plasticizer are present in amounts sufficient for the composition to be cohesive, swellable and pressure-sensitive adhesive.
Claim 3
Dependent Claim
75 words
A polymerizable composition for production of an adhesive according to claim 1 comprising at least one N-vinyl lactam monomer, a multi-ethylenically unsaturated compound wherein the ethylenic groups are vinyl groups, allyl groups, or methallyl groups bonded to nitrogen or oxygen atoms, a plasticizer and a free radical initiator, wherein said multi-ethylenically unsaturated compound is present in an amount in the presence of said plasticizer sufficient to render the resulting polymer a cohesive swellable pressure-sensitive adhesive.
Claim 4
Dependent Claim
23 words
A composition in accordance wih claim 2 wherein said plasticizer is a solvent for said N-vinyl lactam monomer and the multi-ethylenically unsaturated compound.
Claim 5
Dependent Claim
44 words
Compositions in accordance with any one of claims 1 to 3 wherein said multi-ethylenically unsaturated compound is selected from divinyl, diallyl or dimethallyl esters, divinyl, diallyl or dimethallyl amides, including bis (N-vinyl lactams), divinyl, diallyl or dimethallyl ethers, and divinyl, diallyl or dimethallyl ureas.
Claim 6
Dependent Claim
37 words
Compositions in accordance with any one of claims 1 to 4 wherein the amount of multi-ethylenically unsaturated compound in the polymeric matrix ranges from about 0.02 to about 5 percent by weight of the nonvolatile polymeric matrix.
Claim 7
Dependent Claim
15 words
Compositions in accordance with claim 5 wherein said multi-ethylenically unsaturated compound is a bis(N-vinyl lactam).
Claim 8
Dependent Claim
18 words
Compositions in accordance with claim 5 wherein said multi-ethylenically unsaturated compound is a divinyl amide or divinyl urea.
Claim 9
Dependent Claim
15 words
Compositions in accordance with claim 5 wherein said multi-ethylenically unsaturated compound is a divinyl ether.
Claim 10
Dependent Claim
18 words
Compositions in accordance wih any one of claims 1 to 8 wherein the N-vinyl lactam monomer is N-vinyl-2-pyrrolidone.
Claim 11
Dependent Claim
18 words
Compositions in accordance with any one of claims 1 to 9 wherein the plasticizer is comprised of glycerol.
Claim 12
Dependent Claim
15 words
Compositions in accordance with claim 10 wherein said plasticizer is comprised of glycerol and water.
Claim 13
Dependent Claim
29 words
Compositions in accordance with any one of claims 1 to 11 wherein the plasticizer is present in an amount of at least 35 percent by weight of the composition.
Claim 14
Dependent Claim
29 words
Compositions in accordance with any one of claims 1 to 12 wherein a pharmaceutical is mixed with said pressure-sensitive adhesive composition so as to form a transdermal delivery adhesive.
Claim 15
Dependent Claim
39 words
Compositions in accordance with any one of claims 1 to 13 wherein the plasticizer contains water and the composition further includes an electrolyte in an amount sufficient to render the composition susceptible to the passage of an electric current.
Claim 16
Dependent Claim
32 words
A biomedical electrode comprising an electrical conductor having means for electrical connection to a lead wire of an electromedical device, which electrical conductor contacts an adhesive composition in accordance with claim 14.
Claim 17
Dependent Claim
23 words
A composition in accordance with claim 1 or claims 4 onwards as dependent on claim 1 wherein said free-radical polymerization is initiated photochemically.
Claim 18
Dependent Claim
105 words
A composition in accordance with claim 2 wherein the N-vinyl lactam monomer is present in an amount of 5 to 50 percent by weight of the composition, the plasticizer is a mixture of glycerol and water, which mixture is present in an amount from 50 to 95 percent by weight of the composition, the multi-ethylenically unsaturated compound is present in an amount of from 0.02 to 5.0 percent by weight of the N-vinyl lactam monomer, and the free radical initiator is a photoinitiator which is present in an amount of from 0.02 percent to 2 percent by weight of the polymerizable components of the composition.
Claim 19
Dependent Claim
120 words
An essentially solventless method of preparing an adhesive composition in accordance with claim 1 comprising: a) preparing a mixture comprising an N-vinyl lactam monomer, a multi-ethylenically unsaturated compound wherein the ethylenic groups are vinyl groups, allyl groups, or methallyl groups bonded to nitrogen or oxygen atoms, a plasticizer, which plasticizer is a solvent for said N-vinyl lactam monomer and said multi-ethylenically unsaturated compound, and a free radical initiator; b) depositing said mixture on a substrate to form a layer; and c) exposing said layer to sufficient energy to result in the formation of a cohesive swellable crosslinked copolymer, wherein said multi-ethylenically unsaturated compound and plasticizer are present in amounts sufficient to render the resulting polymer swellable, cohesive and pressure-sensitive adhesive.
References Cited (Backward Citations)
US3345320A
Cited
WO1986005083A1
Cited
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