US4946742A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure-sensitive adhesive having improved adhesion to plasticized vinyl substrates
Assignee: 3M Co
•
Filing: 1988-05-20
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Granted: 1990-08-07
•
Expires: 2008-05-20
Abstract
Abstract Normally tacky and pressure-sensitive adhesive, having excellent long-term adhesion to plasticized vinyl substrates, is prepared from a representative blend of dioctyl phthalate plasticizer and a copolymer of isooctyl acrylate, N-vinyl pyrrolidone, and acrylic acid; alternatives for each component are disclosed. In a preferred embodiment of the invention, the adhesive is coated in a thin layer on a sheet backing material to form a normally tacky and pressure-sensitive adhesive tape.
Inventors
- 👤 Donald T. Landin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:51
CPC Classifications
C; C09; C09J; C09J133/00; C09J133/04; C09J133/06; C09J133/08; C09J4/00; C09J4/06; C08; C08L; C08L33/00; C08L33/04; C08L33/06; C08L33/08; C09J7/00; C09J7/30; C09J7/38; C09J7/381; C09J7/385; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2809; Y10T428/2852; Y10T428/2878; Y10T428/2887; Y10T428/2891
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
142 words
A normally tacky and pressure-sensitive adhesive tape comprising a sheet backing carrying a layer of adhesive, said adhesive having outstanding ability to bond to plasticized vinyl substrates and to remain firmly bonded thereto even after remaining in contact therewith for extended periods of time, said adhesive comprising: a copolymer of 100 parts of monomers consisting essentially of 60-88 parts of acrylic acid ester of non-tertiary 4-14 carbon alcohol, 2-30 parts of polar nitrogen-containing vinyl monomer, and 0-12 parts of vinyl carboxylic acid, said copolymer being intimately blended with 2-35% by weight of plasticizer based on said copolymer, the adhesive being characterized by having a 180° peel adhesion to plasticized vinyl cable jacketing of at least 48 N/dm after being adhered thereto for three days at room temperature, and at least 31 N/dm after being adhered thereto for one week at 70° C.
Claim 2
Dependent Claim
142 words
A normally tacky and pressure-sensitive adhesive tape comprising a sheet backing carrying a layer of adhesive, said adhesive having outstanding ability to bond to plasticized vinyl substrates and to remain firmly bonded thereto even after remaining in contact therewith for extended periods of time, said adhesive comprising: a copolymer of 100 parts of monomers consisting essentially of 60-88 parts of acrylic acid ester of non-tertiary 4-14 carbon alcohol, 2-30 parts of polar nitrogen-containing vinyl monomer, and 0-12 parts of vinyl carboxylic acid, said copolymer being intimately blended with 2-35% by weight of plasticizer based on said copolymer, the adhesive being characterized by having a 180° peel adhesion to plasticized vinyl cable jacketing of at least 48 N/dm after being adhered thereto for three days at room temperature, and at least 31 N/dm after being adhered thereto for one week at 70° C.
Claim 3
Dependent Claim
13 words
The adhesive of claim 1 wherein the acrylic acid ester is isooctyl acrylate.
Claim 4
Dependent Claim
13 words
The adhesive of claim 2 wherein the nitrogen-containing vinyl polymer is N-vinyl pyrrolidone.
Claim 5
Dependent Claim
12 words
The adhesive of claim 2 wherein the nitrogen-containing vinyl polymer is N,N-dimethylacrylamide.
Claim 6
Dependent Claim
13 words
The adhesive of claim 2 wherein the nitrogen-containing vinyl monomer is N,N-pentamethylene acrylamide.
Claim 7
Dependent Claim
10 words
The adhesive of claim 3 wherein the plasticizer is monomeric.
Claim 8
Dependent Claim
12 words
The adhesive of claim 5 wherein 2-10 parts of plasticizer are employed.
Claim 9
Dependent Claim
20 words
The tape of claim 1 wherein the surface of the backing adjacent the adhesive is provided with a release surface.
Claim 10
Dependent Claim
19 words
The tape of claim 1 wherein the backing is the back surface of a strip of hook-and-loop fastener material.
Claim 11
Dependent Claim
11 words
The tape of claim 1 wherein the adhesive contains glass microbubbles.
Claim 12
Dependent Claim
11 words
The tape of claim 1 wherein the adhesive contains polymeric microbubbles.
Claim 13
Dependent Claim
15 words
The tape of claim 1 wherein the adhesive is crosslinked to increase its shear adhesion.
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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) | 1993-08-06 | 1994-02-05 | 1994-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-06 | 1998-02-05 | 1998-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-06 | 2002-02-05 | 2002-08-07 | $7700.00 | Window Closed / Lapsed |