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
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Filing: 1994-04-26
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Granted: 1996-11-05
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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 05:50
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.
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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) | 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 |