US4731273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-recoverable closure with crosslinked pressure-sensitive adhesive
Assignee: 3M Co
•
Filing: 1985-07-08
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Granted: 1988-03-15
•
Expires: 2005-07-08
Abstract
Abstract A heat-recoverable closure with a crosslinked pressure-sensitive adhesive is provided. The closure member is comprised of a heat-recoverable sheet and a layer of crosslinked pressure-sensitive adhesive, which maintains the closure of the closure member having the recovery process. The combination of a high surface energy heat-recoverable sheet and the crosslinked pressure-sensitive adhesive yield an article having excellent performance as a closure member.
Inventors
- 👤 Thomas J. Bonk
- 👤 Tsung-I Chen
- 👤 Patricia M. Olson
- 👤 Douglas E. Weiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:12
CPC Classifications
C; C09; C09J; C09J133/00; C09J133/04; C09J133/06; C09J133/08; B; B29; B29C; B29C61/00; B29C61/06; B29C61/10; C09J4/00; C09J4/06; C09J7/00; C09J7/20; C09J7/22; C09J7/24; C09J7/241; C09J7/30; C09J7/38; C09J7/381; C09J7/385; C08; C08L; C08L2666/00; C08L2666/02; C08L2666/14; C08L2666/28; C09J2301/00; C09J2301/30; C09J2301/302; F; F16; F16L; F16L47/00; F16L47/20; F16L47/22; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1328; Y10T428/19; Y10T428/28; Y10T428/2852; Y10T428/2878; Y10T428/2887; Y10T428/2891
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
84 words
An article useful as a wrap-around protective closure comprising: (a) a sheet of flexible heat-recoverable material with a low surface-energy, having a unidirectional direction or recovery; (b) a layer of an effective amount of a crosslinked pressure-sensitive adhesive having an exposed face and a face in contact with said sheet, adhered to at least a portion of said sheet transverse to said direction of recovery of said sheet; and (c) a primer graft-polymerized to at least a portion of said sheet of heat-recoverable material.
Claim 2
Dependent Claim
84 words
An article useful as a wrap-around protective closure comprising: (a) a sheet of flexible heat-recoverable material with a low surface-energy, having a unidirectional direction or recovery; (b) a layer of an effective amount of a crosslinked pressure-sensitive adhesive having an exposed face and a face in contact with said sheet, adhered to at least a portion of said sheet transverse to said direction of recovery of said sheet; and (c) a primer graft-polymerized to at least a portion of said sheet of heat-recoverable material.
Claim 3
Dependent Claim
49 words
An article according to claim 1 wherein the primer comprises at least one monomer selected from the group consisting of acrylic acid, methacrylic acid and esters thereof, acrylamides, methacrylamide, sterically nonhindered tertiary alkyl acrylamides and methacrylamides having three or less carbon atoms in the alkyl group and N-vinyl pyrrolidone.
Claim 4
Dependent Claim
12 words
An article according to claim 2 where in the primer comprises N,N-dimethylacrylamide.
Claim 5
Dependent Claim
20 words
An article according to claim 1 further comprising a release liner having a face contacting said sheet or said adhesive.
Claim 6
Dependent Claim
103 words
An article in accordance with claim 1 where wherein the crosslinked pressure-sensitive adhesive is comprised of: (a) an acrylate terpolymer comprised of: (i) at least one alkyl acrylate wherein the alkyl group has at least 5 carbon atoms, (ii) a second alkyl acrylate wherein the alkyl group has from 1 to 4 carbon atoms; (iii) at least one copolymerizable monoethylenic monomer selected from the group consisting of acrylic acid, methacrylic acid, and itaconic acid; and (b) a crosslinking agent selected from the group consisting of (i) an amine formaldehyde condensate, (ii) a chromophore-substituted trihalomethyltriazine, (iii) a polyfunctional acrylate monomer, and (iv) mixtures thereof
Claim 7
Dependent Claim
18 words
An article in accordance with claim 5 wherein the crosslinking agent is a lower alkoxylated amine formaldehyde condensate.
Claim 8
Dependent Claim
15 words
An article in accordance with claim 5 wherein the crosslinking agent is a chromophore-substituted trihalomethyltriazine.
Claim 9
Dependent Claim
13 words
An article in accordance with claim 5 wherein the crosslinking agent is 4(3,4-dimethoxyphenyl)-bistrichloromethyl-s-triazine.
Claim 10
Dependent Claim
23 words
An article in accordance with claim 6 wherein the crosslinking agent is a mixture of an amine formaldehyde condensate and a chromophore-substituted trihalomethyltriazine.
Claim 11
Dependent Claim
16 words
An article in accordance with claim 5 wherein the crosslinking agent is a polyfunctional acrylate monomer.
Claim 12
Dependent Claim
12 words
An article in accordance with claim 1 further comprising a reinforcing filler.
Claim 13
Dependent Claim
14 words
An article in accordance with claim 11 wherein the reinforcing filler is fumed silica.
Claim 14
Dependent Claim
27 words
An article in accordance with claim 12 wherein the fumed silica is present at a concentration of about 2% to about 7% by weight of the adhesive.
Claim 15
Dependent Claim
27 words
An article in accordance with claim 13 wherein the fumed silica is present at a concentration of about 3% to about 6% by weight of the adhesive.
Claim 16
Dependent Claim
22 words
An article in accordance with claim 1 wherein the sheet material is a blend of a non-crystalline polymer and a semicrystalline polymer.
Claim 17
Dependent Claim
14 words
An article in accordance with claim 1 wherein the sheet material is a polyolefin.
Claim 18
Dependent Claim
13 words
An article in accordance with claim 16 wherein the sheet material is polyethylene.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-03-15 | 1991-09-14 | 1992-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-15 | 1995-09-14 | 1996-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-15 | 1999-09-14 | 2000-03-15 | $7700.00 | Window Closed / Lapsed |