US4748216A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purified cycloolefin polymerization composition
Assignee: Metton America Inc
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Filing: 1987-03-12
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Granted: 1988-05-31
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Expires: 2007-03-12
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 adsorbent.
Inventors
- 👤 Glenn M. Tom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:09
CPC Classifications
C; C08; C08G; C08G61/00; C08G61/02; C08G61/04; C08G61/06; C08G61/08
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
108 words
A method of making a molded product comprising a substantially crosslinked polymeric composition of crosslinked polymerized units of cycloolefin, said method comprising: providing a metathesis catalyst and an absorption purified cycloolefin composition, said cycloolefin composition comprising at least 50% by weight dicyclopentadiene liquid, said absorption purified cycloolefin composition being sufficiently reactive to polymerize to form said crosslinked polymer in about one minute or less in the presence of a metathesis catalyst, combining said catalyst and said cycloolefin composition in contact with a mold means to form a reaction composition whereby said reaction composition forms said molded product comprising substantially crosslinked polymeric composition in about one minute or less.
Claim 2
Independent Claim
108 words
A method of making a molded product comprising a substantially crosslinked polymeric composition of crosslinked polymerized units of cycloolefin, said method comprising: providing a metathesis catalyst and an absorption purified cycloolefin composition, said cycloolefin composition comprising at least 50% by weight dicyclopentadiene liquid, said absorption purified cycloolefin composition being sufficiently reactive to polymerize to form said crosslinked polymer in about one minute or less in the presence of a metathesis catalyst, combining said catalyst and said cycloolefin composition in contact with a mold means to form a reaction composition whereby said reaction composition forms said molded product comprising substantially crosslinked polymeric composition in about one minute or less.
Claim 3
Dependent Claim
13 words
The method of claim 1 wherein said methathesis catalyst comprises WCl 6 .
Claim 4
Dependent Claim
13 words
The method of claim 1 wherein said methathesis catalyst comprises WClO 4 .
Claim 5
Dependent Claim
17 words
The method of claim 1 wherein said absorption purified cycloolefin composition is purified by distillation and absorption.
Claim 6
Dependent Claim
27 words
The method of claim 4 wherein said absorption comprises contacting a cycloolefin mixture with an adsorbant effective to substantially reduce the concentration of inhibitors of cycloolefin polymerization.
Claim 7
Dependent Claim
13 words
The method of claim 5 wherein said adsorbant comprises molecular sieve or alumina.
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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) | 1991-05-31 | 1991-11-30 | 1992-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-31 | 1995-11-30 | 1996-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-31 | 1999-11-30 | 2000-05-31 | $7700.00 | Window Closed / Lapsed |