US4584425A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cycloolefin purification method and polymerization composition
Assignee: Metton America Inc
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Filing: 1984-11-16
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Granted: 1986-04-22
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Expires: 2004-11-16
Abstract
Abstract A high flash point cycloolefin composition, including at least 50% by weight dicyclopentadiene, the composition having a flash point of greater than 100° F. and a viscosity of from about 3 cps to about 3000 cps at about 70° F. and about 1 atmosphere pressure. The cycloolefin composition is used in a method of preparation of cycloolefin for polymerization by metathesis catalysis to form a substantially crosslinked thermoset polymer by: distilling the cycloolefin to form distilled cycloolefin, and contacting the distilled cycloolefin and an adsorbant.
Inventors
- 👤 Glenn M. Tom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:51
CPC Classifications
C; C08; C08G; C08G61/00; C08G61/02; C08G61/04; C08G61/06; C08G61/08
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
53 words
A method of preparation of dicyclopentadiene for rapid polymerization by metathesis catalysis (a) distilling impure dicyclopentadiene to form distilled dicyclopentadiene, (b) contacting said distilled dicyclopentadiene and an adsorbant to form purified dicyclopentadiene, said purified dicyclopentadiene being sufficiently reactive to polymerize in about one minute or less in the presence of a metathesis catalyst.
Claim 2
Independent Claim
53 words
A method of preparation of dicyclopentadiene for rapid polymerization by metathesis catalysis (a) distilling impure dicyclopentadiene to form distilled dicyclopentadiene, (b) contacting said distilled dicyclopentadiene and an adsorbant to form purified dicyclopentadiene, said purified dicyclopentadiene being sufficiently reactive to polymerize in about one minute or less in the presence of a metathesis catalyst.
Claim 3
Dependent Claim
14 words
The method of claim 1 wherein said adsorbant is alumina or zeolite molecular sieves.
Claim 4
Dependent Claim
26 words
The method of claim 1 further comprising heating said adsorbant to at least 150° C. but not more than about 600° C. before contacting with dicyclopentadiene.
Claim 5
Dependent Claim
27 words
The method of claim 1 further comprising heating said adsorbant to at least about 500° C. but not more than about 600° C. before contacting with dicyclopentadiene.
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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) | 1989-04-21 | 1989-10-21 | 1990-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-21 | 1993-10-21 | 1994-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-21 | 1997-10-21 | 1998-04-22 | $7700.00 | Window Closed / Lapsed |