Patent US4415718A successfully refreshed from Google Patents.
US4415718A
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Terpolymer produced from ethylene, propylene and butylene-1
Assignee: Eneos Corp
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Filing: 1982-02-16
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Granted: 1983-11-15
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Expires: 2002-02-16
Abstract
Abstract Using a catalyst comprising (1) a solid substance which contains magnesium and titanium, (2) an organometallic compound and (3) an electron donor, there are polymerized ethylene, propylene and 1-butene to obtain a soft or semi-hard terpolymer of low crystallinity containing 75.2 to 91.5 mol % propylene, 7.5 to 14.9 mol % ethylene and 1.0 to 9.9 mol % 1-butene.
Inventors
- 👤 Mituji Miyoshi
- 👤 Kazuo Matsuura
- 👤 Yoshio Tajima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:40
CPC Classifications
C; C08; C08F; C08F210/00; C08F210/04; C08F210/06; Y; Y10; Y10S; Y10S526/00; Y10S526/916; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
89 words
An ethylene/propylene/1-butene terpolymer characterized by containing 75.2 to 91.5 mol% propylene, 7.5 to 14.9 mol% ethylene and 1.0 to 9.9 mol% 1-butene, having a melting point based on DSC of 20° to 145° C., a haze value not larger than 40% when pressed to the thickness of 0.5 mm at 190° C. and measured according to JIS K 6714, a Shore C hardness based on JIS of 20 to 80 and a density of 0.86 to 0.91, and containing 0.01% to 5% by weight of boiling n-heptane insoluble portion.
Claim 2
Dependent Claim
89 words
An ethylene/propylene/1-butene terpolymer characterized by containing 75.2 to 91.5 mol% propylene, 7.5 to 14.9 mol% ethylene and 1.0 to 9.9 mol% 1-butene, having a melting point based on DSC of 20° to 145° C., a haze value not larger than 40% when pressed to the thickness of 0.5 mm at 190° C. and measured according to JIS K 6714, a Shore C hardness based on JIS of 20 to 80 and a density of 0.86 to 0.91, and containing 0.01% to 5% by weight of boiling n-heptane insoluble portion.
Claim 3
Dependent Claim
30 words
The terpolymer as defined in claim 1, in which the propylene content, ethylene content and 1-butene content are 77.0 to 86.0 mol%, 8.0 to 14.0 mol% and 9.0 mol%, respectively.
Claim 4
Dependent Claim
32 words
The terpolymer as defined in claim 1, in which the propylene content, ethylene content and 1-butene content are 77.0 to 83.5 mol%, 10.0 to 14.0 mol% and 6.5 to 9.0 mol%, respectively.
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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) | 1986-11-14 | 1987-05-16 | 1987-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-14 | 1991-05-16 | 1991-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-14 | 1995-05-16 | 1995-11-15 | $7700.00 | Window Closed / Lapsed |