US5362816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High cohesive strength pressure-sensitive adhesives incorporating acetoacetate
Assignee: Rohm and Haas Co
•
Filing: 1992-06-04
•
Granted: 1994-11-08
•
Expires: 2012-06-04
Abstract
Abstract A pressure-sensitive adhesive having improved shear strength obtained by virtue of the formation of the enamine of a pendent acetoacetate is described. These materials contain acetoacetate functional monomer in a low Tg emulsion polymer. Shear strength is improved without compromise of either peel strength or tack.
Inventors
- 👤 Barry S. Snyder
- 👤 Daniel A. Bors
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:12
CPC Classifications
C; C09; C09J; C09J157/00; C09J157/06; C09J157/12; C08; C08F; C08F8/00; C08F8/30; C08F8/32; C09J133/00; C09J133/04; C09J133/06; C09J133/062; C09J2301/00; C09J2301/30; C09J2301/302; Y; Y10; Y10S; Y10S526/00; Y10S526/931; Y10T; Y10T428/00; Y10T428/28; Y10T428/2852; Y10T428/31504; Y10T428/31942
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
50 words
A pressure-sensitive adhesive comprising a polymer prepared by free radical emulsion polymerization having a Tg below about 0° C. and having pendent acetoacetate functional groups wherein the pendent acetoacetate groups have been reacted with ammonia or a primary amine to form an enamine-containing composition at a pH greater than 9.
Claim 2
Dependent Claim
50 words
A pressure-sensitive adhesive comprising a polymer prepared by free radical emulsion polymerization having a Tg below about 0° C. and having pendent acetoacetate functional groups wherein the pendent acetoacetate groups have been reacted with ammonia or a primary amine to form an enamine-containing composition at a pH greater than 9.
Claim 3
Dependent Claim
25 words
The pressure-sensitive adhesive of claim 1, wherein the amount of acetoacetate functional monomer in the polymer is from about 0.05 to about 10 weight percent.
Claim 4
Dependent Claim
25 words
The pressure-sensitive adhesive of claim 1, wherein the amount of acetoacetate functional monomer in the polymer is from about 0.5 to about 5 weight percent.
Claim 5
Dependent Claim
25 words
The pressure-sensitive adhesive of claim 1, wherein the amount of acetoacetate functional monomer in the polymer is from about 1 to about 5 weight percent.
References Cited (Backward Citations)
US4048214A
Cited
GB1185216A
Cited
US4540739A
Cited
US4677167A
Cited
US5071914A
Cited
US4908403A
Cited
US5053452A
Cited
US4759983A
Cited
US4906684A
Cited
EP0492847A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-11-07 | 1998-05-09 | 1998-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-11-07 | 2002-05-09 | 2002-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-11-07 | 2006-05-09 | 2006-11-08 | $7700.00 | Window Closed / Lapsed |