Patent JPH0465264A successfully refreshed from Google Patents.
US4935476A
Expired / Lapsed
US
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Preparation of amine-modified ethylene/carboxylic acid copolymers, such copolymers, and use thereof as adhesion promoters and cable sheathing
Assignee: BASF SE
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Filing: 1989-08-30
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Granted: 1990-06-19
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Expires: 2009-08-30
Abstract
Abstract A high molecular weight ethylene copolymer is prepared by high-pressure copolymerization of ethylene with an α,β-ethylenically unsaturated carboxylic acid, carboxylic anhydride or a derivative thereof in the presence of a tertiary organic monoamine, preferably from 10 to 100 mol % thereof, based on the unsaturated carboxylic acid used, and can be used for preparing adhesion promoters and cable sheathing.
Inventors
- 👤 Norbert Hasenbein
- 👤 Thomas Muehlenbernd
- 👤 Gernot Koehler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:50
CPC Classifications
C; C08; C08F; C08F210/00; C08F210/02; C08F8/00; C08F8/30; C08F8/32
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
88 words
A process for preparing a high molecular weight ethylene copolymer having a melt flow index to less than 40 g/10 min by copolymerization of ethylene with an α,β-ethylenically unsaturated acrylic acid, carboxylic anhydride or a derivative thereof in a polymerization system at pressures of from 500 to 5,000 bar and temperatures of from 40° to 350° C. in the presence of a free-radical polymerization initiator and in the presence or absence of a molecular weight regulator, which comprises copolymerizing in the additional presence of a tertiary organic monoamine.
Claim 2
Dependent Claim
88 words
A process for preparing a high molecular weight ethylene copolymer having a melt flow index to less than 40 g/10 min by copolymerization of ethylene with an α,β-ethylenically unsaturated acrylic acid, carboxylic anhydride or a derivative thereof in a polymerization system at pressures of from 500 to 5,000 bar and temperatures of from 40° to 350° C. in the presence of a free-radical polymerization initiator and in the presence or absence of a molecular weight regulator, which comprises copolymerizing in the additional presence of a tertiary organic monoamine.
Claim 3
Dependent Claim
36 words
A process as claimed in claim 1, wherein the copolymerization is carried out in the presence of from 10 to about 100 mol%, based on the unsaturated carboxylic acid compound used, of the tertiary organic amine.
Claim 4
Dependent Claim
22 words
A process as claimed in claim 1, wherein the copolymerization is carried out in the presence of an aliphatic tertiary organic amine.
Claim 5
Dependent Claim
29 words
A process as claimed in claim 3, wherein the copolymerization is carried out in the presence of a trialkylamine which contains alkyls of from 1 to 18 carbon atoms.
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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) | 1993-06-18 | 1993-12-18 | 1994-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-18 | 1997-12-18 | 1998-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-18 | 2001-12-18 | 2002-06-19 | $7700.00 | Window Closed / Lapsed |