Patent US4593075A successfully refreshed from Google Patents.
US4593075A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of elastomeric, chlorinated ethylene polymers
Assignee: Union Carbide Corp
•
Filing: 1984-05-14
•
Granted: 1986-06-03
•
Expires: 2004-05-14
Abstract
Abstract A process of modifying ethylene polymers by reacting granular ethylene polymers having a density of about 0.87 to about 0.92 gram per cc and a pore volume of about 0.1 to about 1 cc per gram with a gaseous chlorinating agent to produce elastomeric, granular, chlorinated polymers having a tensile modulus of less than about 2,000 psi and a crystallinity of less than about 10 percent.
Inventors
- 👤 Mahmoud R. Rifi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:49
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/18; C08F8/20
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
83 words
A process which comprises reacting, at a temperature of about 50° C. to about 130° C. and for a period of about 3 to about 10 hours, an ethylene-butene-1 copolymer having a density of about 0.875 to about 0.918 and a pore volume of about 0.1 to about 1 cc per gram with a gaseous chlorinating agent to produce an elastomeric, granular, chlorinated polymer having a tensile modulus of less than about 2,000 psi and a crystallinity of less than about 10 percent.
Claim 2
Dependent Claim
83 words
A process which comprises reacting, at a temperature of about 50° C. to about 130° C. and for a period of about 3 to about 10 hours, an ethylene-butene-1 copolymer having a density of about 0.875 to about 0.918 and a pore volume of about 0.1 to about 1 cc per gram with a gaseous chlorinating agent to produce an elastomeric, granular, chlorinated polymer having a tensile modulus of less than about 2,000 psi and a crystallinity of less than about 10 percent.
Claim 3
Dependent Claim
24 words
A process as defined in claim 1 wherein the ethylene-butene-1 copolymer has a pore volume of about 0.1 to about 0.5 cc per gram.
Claim 4
Dependent Claim
35 words
A process as defined in claim 1 wherein said polymer has a density of about 0.89 to about 0.91 gram per cc and a pore volume of about 0.2 to about 0.4 cc per gram.
Claim 5
Dependent Claim
14 words
A process as defined in claim 1 wherein the chlorinating agent is gaseous chlorine.
Claim 6
Dependent Claim
52 words
A process as defined in claim 1 wherein the ethylene polymer has the following properties: an average particle size of about 200 to about 1,500, a bulk density of about 10 to about 30, a pore volume of about 0.1 to about 1, and a density of about 0.87 to about 0.92.
References Cited (Backward Citations)
US2890213A
Cited
US3206444A
Cited
US2928819A
Cited
US2964509A
Cited
US2913449A
Cited
US3033845A
Cited
US3347835A
Cited
US3542746A
Cited
US3624054A
Cited
GB1385778A
Cited
US3770706A
Cited
US4029850A
Cited
US4011379A
Cited
US4029862A
Cited
US4144289A
Cited
US4220739A
Cited
US4547554A
Cited
US4452953A
Cited
US4425206A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-06-02 | 1989-12-02 | 1990-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-02 | 1993-12-02 | 1994-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-02 | 1997-12-02 | 1998-06-03 | $7700.00 | Window Closed / Lapsed |