Patent US5571878A successfully refreshed from Google Patents.
US5571878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ethylene-alkyl acrylate copolymers and derivatives having improved melt-point temperatures and adhesive strength and processes for preparing same
Assignee: Westlake Longview Corp
•
Filing: 1994-04-26
•
Granted: 1996-11-05
•
Expires: 2014-04-26
Abstract
Abstract A composition is disclosed which comprises a copolymer of ethylene and alkyl acrylate having improved melt-point temperature and/or improved adhesiveness to polymeric substrates. A process for making these compositions is also disclosed. In addition, an ionomer made from the copolymer and a method for making the ionomer are disclosed.
Inventors
- 👤 Jerry G. Latiolais
- 👤 J. Paul Gathright
- 👤 Nicholas R. Galante
- 👤 M. Stephen Galland
- 👤 J. Diores Gallet
- 👤 Lewis R. Compton
- 👤 George L. Baker
- 👤 James H. Wang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:54
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/44; C08F210/00; C08F210/02; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08L23/0846; C08L23/0869; C08L23/06; C08L23/0853; C08L23/10; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/31935
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
131 words
A process for the preparation of ethylene-alkyl acrylate copolymers comprising: A) feeding overall an amount by weight, A, of alkyl acrylate and an amount by weight, E, of ethylene to a multi-zone agitated autoclave polymerization reactor; B) introducing an effective amount of an initiator and at least a portion, E 1 , of the total amount of ethylene into a first reaction zone of the reactor; C) concurrently introducing a portion, A 1 , of alkyl acrylate to said first reaction zone such that the ratio A 1 /E 1 is at least about 20% more than or is at least about 20% less than the ratio A/E for the reactor overall; and D) feeding any remaining portions of initiator, ethylene and alkyl acrylate to a subsequent reaction zone or zones.
Claim 2
Dependent Claim
131 words
A process for the preparation of ethylene-alkyl acrylate copolymers comprising: A) feeding overall an amount by weight, A, of alkyl acrylate and an amount by weight, E, of ethylene to a multi-zone agitated autoclave polymerization reactor; B) introducing an effective amount of an initiator and at least a portion, E 1 , of the total amount of ethylene into a first reaction zone of the reactor; C) concurrently introducing a portion, A 1 , of alkyl acrylate to said first reaction zone such that the ratio A 1 /E 1 is at least about 20% more than or is at least about 20% less than the ratio A/E for the reactor overall; and D) feeding any remaining portions of initiator, ethylene and alkyl acrylate to a subsequent reaction zone or zones.
Claim 3
Dependent Claim
19 words
The process of claim 1 wherein the alkyl acrylate is methyl acrylate, ethyl acrylate, butyl acrylate or mixtures thereof.
Claim 4
Dependent Claim
17 words
The process of claim 1 wherein the ratio E 1 /E is between about 0.10 and 0.90.
References Cited (Backward Citations)
US3350372A
Cited
US3334081A
Cited
US4307211A
Cited
DE3225171A1
Cited
US4414053A
Cited
US4617366A
Cited
EP0175316A2
Cited
US4638034A
Cited
US4833224A
Cited
EP0225067A1
Cited
US5051297A
Cited
US4788265A
Cited
US4758629A
Cited
US5043205A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-11-05 | 2000-05-06 | 2000-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-11-05 | 2004-05-06 | 2004-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-11-05 | 2008-05-06 | 2008-11-05 | $7700.00 | Window Closed / Lapsed |