US4985488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure-sensitive adhesive having improved adhesion to plasticized vinyl substrates
Assignee: 3M Co
•
Filing: 1990-04-16
•
Granted: 1991-01-15
•
Expires: 2010-04-16
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 isoctyl acrylate, N-vinyl pryrrolidone, 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
2026-10-27 07:47
CPC Classifications
C; C09; C09J; C09J4/00; C09J4/06; C09J7/00; C09J7/30; C09J7/38; C09J7/381; C09J7/385; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2848; Y10T428/2852; Y10T428/2878; Y10T428/2887
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
126 words
Normally tacky and pressure-sensitive 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, comprising: a copolymer of 100 parts of monomers consisting essentially of 60-88 parts of acrylic acid ester of non-tertiary 4-14 carbon alkyl 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% 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
126 words
Normally tacky and pressure-sensitive 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, comprising: a copolymer of 100 parts of monomers consisting essentially of 60-88 parts of acrylic acid ester of non-tertiary 4-14 carbon alkyl 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% 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.
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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) | 1994-01-14 | 1994-07-16 | 1995-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-14 | 1998-07-16 | 1999-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-14 | 2002-07-16 | 2003-01-15 | $7700.00 | Window Closed / Lapsed |