US4943461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiation-curable pressure-sensitive adhesive having improved adhesion to plasticized vinyl substrates
Assignee: 3M Co
•
Filing: 1989-02-01
•
Granted: 1990-07-24
•
Expires: 2009-02-01
Abstract
Abstract The current invention provides a photopolymerized pressure-sensitive adhesive which adheres well to all common surfaces and has an 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 an acrylic copolymer and a nitrile butadiene rubber or mixture of rubbers. Preferred pressure-sensitive adhesives of the invention comprise from about 1 to about 10 parts of the nitrile rubber or a mixture thereof.
Inventors
- 👤 Naimul Karim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:52
CPC Classifications
C; C09; C09J; C09J133/00; C09J133/04; C09J133/06; C09J133/08; C09J7/00; C09J7/30; C09J7/38; C09J7/381; C09J7/385; C08; C08L; C08L2666/00; C08L2666/02; C08L2666/04; C08L9/00; C08L9/02; C09J2301/00; C09J2301/30; C09J2301/302; Y; Y10; Y10T; Y10T428/00; Y10T428/14; Y10T428/1414; Y10T428/28; Y10T428/2809; Y10T428/2839; Y10T428/2848; Y10T428/2852; Y10T428/2878; Y10T428/2887; Y10T428/2891
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
94 words
A photopolymerized 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) a copolymer of monomers consisting essentially of from about 60 to about 85 parts of acrylic acid ester of nontertiary alcohol, the alkyl groups of which contain from about 4-14 carbon atoms, and from about 15 to about 40 parts of a polar nitrogen-containing vinyl monomer, and (b) 1-10 parts of an acrylonitrile butadiene rubber, based on the weight of the copolymer.
Claim 2
Dependent Claim
94 words
A photopolymerized 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) a copolymer of monomers consisting essentially of from about 60 to about 85 parts of acrylic acid ester of nontertiary alcohol, the alkyl groups of which contain from about 4-14 carbon atoms, and from about 15 to about 40 parts of a polar nitrogen-containing vinyl monomer, and (b) 1-10 parts of an acrylonitrile butadiene rubber, based on the weight of the copolymer.
Claim 3
Dependent Claim
15 words
The adhesive of claim 1 wherein the acrylonitrile butadiene rubber is at least partially hydrogenated.
Claim 4
Dependent Claim
13 words
The adhesive of claim 1 wherein the acrlyic acid ester is isooctyl acrylate.
Claim 5
Dependent Claim
13 words
The adhesive of claim 3 wherein the nitrogen-containing vinyl monomer is N-vinyl pyrrolidone.
Claim 6
Dependent Claim
19 words
The adhesive of claim 1 comprising from about 5 parts to about 10 parts of said acrylonitrile butadiene rubber.
Claim 7
Dependent Claim
12 words
The adhesive of claim 3 wherein the nitrogen-containing vinyl monomers is N,N-dimethyl-acrylamide.
Claim 8
Dependent Claim
13 words
The adhesive of claim 3 wherein the nitrogen-containing vinyl monomer is N,N-pentamethylene acrylamide.
Claim 9
Dependent Claim
20 words
The adhesive of claim 4 wherein the isooctyl acrylate comprises from about 60 to about 75 parts of the copolymer.
Claim 10
Dependent Claim
9 words
The adhesive of claim 1 further comprising a photoinitiator.
Claim 11
Dependent Claim
18 words
A pressure-sensitive adhesive tape comprising a layer of the adhesive of claim 1 carried by a sheet backing.
Claim 12
Dependent Claim
18 words
A pressure-sensitive adhesive tape comprising a layer of the adhesive of claim 3 carried by a sheet backing.
Claim 13
Dependent Claim
20 words
The tape of claim 10 wherein the surface of the backing adjacent the adhesive is provided with a release coating.
Claim 14
Dependent Claim
11 words
The tape of claim 10 wherein the adhesive contains glass microbubbles.
Claim 15
Dependent Claim
18 words
The tape of claim 10 wherein the adhesive further comprises a crosslinking agent 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) | 1993-07-23 | 1994-01-22 | 1994-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-23 | 1998-01-22 | 1998-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-23 | 2002-01-22 | 2002-07-24 | $7700.00 | Window Closed / Lapsed |