Patent US5489624A successfully refreshed from Google Patents.
US5489624A
Expired / Lapsed
US
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Hydrophilic pressure sensitive adhesives
Assignee: 3M Co
•
Filing: 1992-12-01
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Granted: 1996-02-06
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Expires: 2012-12-01
Abstract
Abstract A hydrophilic, pressure sensitive adhesive of a poly(ethylene oxide) derived network plasticized with an essentially non-volatile, polar plasticizer present in an amount sufficient to form a cohesive, pressure sensitive adhesive. The polymeric network is prepared from an oligomeric precursor comprising difunctional poly(ethylene glycol) moieties which have been end-capped with ethylenically unsaturation. The adhesive is useful as a biomedical adhesive for transmitting or receiving electrical signals as a component of a biomedical electrode. The adhesive is also useful as a drug delivery device to deliver pharmaceuticals or other active ingredients to or through mammalian skin. The adhesive is also useful as a component in a skin covering for protecting mammalian skin or mammalian skin openings with antimicrobial agents. A method of preparation of the adhesive is also disclosed.
Inventors
- 👤 Steven S. Kantner
- 👤 Nancy J. Rustad
- 👤 James S. Stefely
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:04
CPC Classifications
C; C09; C09J; C09J171/00; C09J171/02; H; H01; H01B; H01B1/00; H01B1/06; H01B1/12; H01B1/122; H01B1/20; H01M; H01M10/00; H01M10/05; H01M10/052; H01M10/056; H01M10/0564; H01M10/0565; C08; C08L; C08L2666/00; C08L2666/02; C08L2666/14; C08L2666/22; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/28; Y10T428/2839; Y10T428/2852; Y10T428/31504
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
77 words
A hydrophilic, pressure sensitive adhesive comprising: a poly(ethylene oxide) derived network plasticized with an essentially non-volatile, polar plasticizer present in an amount sufficient to form a cohesive, pressure sensitive adhesive, wherein the network is prepared from an oligomeric precursor comprising difunctional poly(ethylene glycol) moieties which have been end-capped with ethylenically unsaturated functionality and wherein the amount of oligomeric precursor in the pressure sensitive adhesive ranges from about 4 to 60 weight percent of the pressure sensitive adhesive.
Claim 2
Dependent Claim
77 words
A hydrophilic, pressure sensitive adhesive comprising: a poly(ethylene oxide) derived network plasticized with an essentially non-volatile, polar plasticizer present in an amount sufficient to form a cohesive, pressure sensitive adhesive, wherein the network is prepared from an oligomeric precursor comprising difunctional poly(ethylene glycol) moieties which have been end-capped with ethylenically unsaturated functionality and wherein the amount of oligomeric precursor in the pressure sensitive adhesive ranges from about 4 to 60 weight percent of the pressure sensitive adhesive.
Claim 3
Dependent Claim
80 words
The adhesive according to claim 1, wherein the oligomeric precursor comprises a compound of the formula: X--Y--[(CH.sub.2 CH.sub.2 O).sub.n --R--O--].sub.p --(CH.sub.2 CH.sub.2 O).sub.n --CH.sub.2 CH.sub.2 --Y--X wherein X are monovalent moieties having ethylenic unsaturation, Y are organic divalent linking groups which serve to activate X towards free radical polymerization, R is an organic divalent linking group, n is an integer of about 10 to about 350, and p is an integer of about 0 to about 30, such that 45<n(p+1)<450.
Claim 4
Dependent Claim
45 words
The adhesive according to claim 2, wherein the network comprises from about 4 to about 60 weight percent of the pressure sensitive adhesive and the essentially non-volatile polar plasticizer is a hydroxy-containing plasticizer comprises from about 96 to about 40 weight percent of the adhesive.
Claim 5
Dependent Claim
44 words
The adhesive according to claim 1, wherein the essentially non-volatile plasticizer is selected from the group consisting of monohydric alcohols, polyhydric alcohols, aromatic alcohols, and mixtures of water and such alcohols where the amount of alcohol is sufficient to render the plasticizer essentially non-volatile.
Claim 6
Dependent Claim
23 words
The adhesive according to claim 2, wherein the molecular weights for the difunctional poly(ethylene glycol) range from about 2,000 to about 20,000 g/mole.
Claim 7
Dependent Claim
42 words
The adhesive according to claim 5, wherein the weight percent of the network ranges from about 15 to about 25 weight percent of the adhesive and the molecular weight for the difunctional poly(ethylene glycol) ranges from about 6,000 to about 12,000 g/mole.
Claim 8
Dependent Claim
40 words
The adhesive according to claim 2, wherein the network is prepared by free radical polymerization of the oligomeric precursor using free radicals generated from thermal, redox, or photochemical initiators or due to exposure of the oligomeric precursor to actinic radiation.
Claim 9
Dependent Claim
37 words
The adhesive according to claim 2, wherein X comprises R'CH═C(R")--, wherein R' is selected from the group consisting of hydrogen and --COOH and R" is selected from the group consisting of hydrogen, methyl, and --CH 2 COOH.
Claim 10
Dependent Claim
22 words
The adhesive according to claim 8, wherein R' comprises hydrogen and R" is selected from the group consisting of hydrogen and methyl.
Claim 11
Dependent Claim
41 words
The adhesive according to claim 2, wherein organic divalent linking group Y is generated upon reaction of an electrophile with an diamine or diol and is chosen so as to activate the ethylenically unsaturated monovalent X group towards free radical polymerization.
Claim 12
Dependent Claim
110 words
The adhesive according to claim 10, wherein Y is selected from the group of structures containing aromatic moieties which, when bound to X, yield vinyl pyridinyl or styrenic functionalities; structures containing carboxyl moieties which when bound to X at the oxygen side yield vinyl ester or isopropenyl ester functionalities; structures containing carboxyl moieties which when bound to X at the carbonyl side yield acrylate, methacrylate, maleate, fumarate, and itaconate functionalities; structures containing carboxamide moieties which when bound to X at the nitrogen side yield N-vinyl amide and N-isopropenyl amide functionality; and structures containing carboxamide moieties which when bound to X at the carbonyl side yield acrylamide, methacrylamide, and maleimide functionalities.
Claim 13
Dependent Claim
30 words
The adhesive according to claim 10 wherein the electrophile comprises an acid halide, an acid anhydride, a cyclic anhydride, an azlactone, an isocyanate, benzyl halide, an epoxy or an acrylate.
Claim 14
Dependent Claim
34 words
The adhesive according to claim 12, wherein the electrophile comprises isocyanatoethyl methacrylate; alkenyl azlactones; m-isopropenyl-alpha, alpha-dimethyl benzyl isocyanate; glycidyl methacrylate; acryloyl ethyl carbonic anhydride; maleic anhydride; methacrylic anhydride; hexanediol diacrylate; or trimethylol propane triacrylate.
Claim 15
Dependent Claim
27 words
The adhesive according to claim 10, where the diol is derivatized through an esterification reaction with acrylic acid, or through a transesterification reaction with an alkyl acrylate.
Claim 16
Dependent Claim
47 words
The adhesive according to claim 10, wherein the diol or diamine is reacted first with a compound comprising two electrophilic groups and the resultant product then reacted in a second step with a nucleophile comprising an amine or an alcohol to provide the terminally difunctional oligomeric precursor.
Claim 17
Dependent Claim
17 words
The adhesive according to claim 15, wherein the nucleophile comprises hydroxyethyl acrylate, hydroxyethyl methacrylate, or hydroxypropyl methacrylate.
Claim 18
Dependent Claim
21 words
The adhesive according to claim 1, further comprising an electrolyte for use as an adhesive conductive medium in a biomedical electrode.
Claim 19
Dependent Claim
18 words
The adhesive according to claim 1, further comprising an antimicrobial agent for use in adhesively contacting mammalian skin.
Claim 20
Dependent Claim
28 words
The adhesive according to claim 1, further comprising pharmaceutical agent for use as an adhesive layer for contacting mammalian skin as a topical, transdermal, or iontophoretic delivery device.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1999-02-05 | 1999-08-07 | 2000-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-02-05 | 2003-08-07 | 2004-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-02-05 | 2007-08-07 | 2008-02-06 | $7700.00 | Window Closed / Lapsed |