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Patent US4456741A successfully refreshed from Google Patents.
US4456741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Terpolymer compositions useful as pressure-sensitive adhesives
Assignee: Eastman Chemical Co
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Filing: 1983-01-17
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Granted: 1984-06-26
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Expires: 2003-01-17
Abstract
Abstract The invention relates to hot-melt pressure-sensitive adhesive compositions having a novel combination of properties. More specifically, the invention relates to polymerized terpolymer compositions containing n-butyl acrylate, N-vinyl-2-pyrrolidinone and styrene which provide pressure-sensitive adhesives. These terpolymer hot-melt pressure-sensitive adhesive compositions have good peel adhesion, excellent shear adhesion and permanent tack.
Inventors
- 👤 William A. Ames
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:26
CPC Classifications
C; C09; C09J; C09J133/00; C09J133/04; C09J133/06; C09J133/08; C08; C08F; C08F212/00; C08F212/02; C08F212/04; C08F212/06; C08F212/08; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08F220/16; C08F220/18; C08F220/1804; C08F220/1808; C08F226/00; C08F226/06; C08F226/10; C09J2301/00; C09J2301/30; C09J2301/304; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2852; Y10T428/2878; Y10T428/2883; Y10T428/2887; Y10T428/2891
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
45 words
A polymerized terpolymeric composition comprising about 80 to 60 weight percent n-butyl acrylate, about 25 to 15 weight percent N-vinyl-2-pyrrolidinone, and about 15 to 5 weight percent styrene and having a melt viscosity of about 15,000 to 200,000 which is useful as a pressure-sensitive adhesive.
Claim 2
Dependent Claim
45 words
A polymerized terpolymeric composition comprising about 80 to 60 weight percent n-butyl acrylate, about 25 to 15 weight percent N-vinyl-2-pyrrolidinone, and about 15 to 5 weight percent styrene and having a melt viscosity of about 15,000 to 200,000 which is useful as a pressure-sensitive adhesive.
Claim 3
Dependent Claim
21 words
A terpolymer composition according to claim 1 wherein said n-butyl acrylate is present in an amount of about 70 weight percent.
Claim 4
Dependent Claim
20 words
A terpolymer composition according to claim 2 wherein said N-vinyl-2-pyrrolidinone is present in an amount of about 20 weight percent.
Claim 5
Dependent Claim
20 words
A terpolymer composition according to claim 3 wherein said styrene is present in an amount of about 10 weight percent.
Claim 6
Dependent Claim
15 words
A terpolymeric composition according to claim 1 having a viscosity of from 30,000 to 100,000.
Claim 7
Dependent Claim
21 words
A terpolymer composition according to claim 5 wherein said n-butyl acrylate is present in an amount of about 70 weight percent.
Claim 8
Dependent Claim
20 words
A terpolymer composition according to claim 6 wherein said N-vinyl-2-pyrrolidinone is present in an amount of about 20 weight percent.
Claim 9
Dependent Claim
20 words
A terpolymer composition according to claim 7 wherein said styrene is present in an amount of about 10 weight percent.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-06-26 | 1987-12-26 | 1988-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-26 | 1991-12-26 | 1992-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-26 | 1995-12-26 | 1996-06-26 | $7700.00 | Window Closed / Lapsed |