US4835230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of a cationic polymerization initiator in the preparation of thermoset polymer
Assignee: Metton America Inc
•
Filing: 1988-10-17
•
Granted: 1989-05-30
•
Expires: 2008-10-17
Abstract
Abstract Disclosed is an improved method for making a thermoset polymer wherein a plurality of reactant streams, one of which contains the activator of a metathesis catalyst system combined with a moderator, and a second of which contains the catalyst of the metathesis catalyst system and at least one of which contains dicyclopentadiene are combined to form a reaction mixture, and the reaction mixture is then injected into a mold where polymerization occurs. The improvement comprises adding to the reaction mixture 1-25 mols of a cationic polymerization initiator per 1000 mols of dicyclopentadiene.
Inventors
- 👤 Nitya P. Khasat
- 👤 Birendra K. Patnaik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:02
CPC Classifications
C; C08; C08G; C08G61/00; C08G61/02; C08G61/04; C08G61/06; C08G61/08
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
96 words
In a method for making a thermoset polymer wherein a plurality of reactant streams, one of which contains the activator of a metathesis catalyst system combined with a moderator, and a second of which contains the catalyst of said metathesis catalyst system and at least one of which contains dicyclopentadiene, are combined to form a reaction mixture, and the reaction mixture is then injected into a mold where polymerization occurs, the improvement which comprises adding to the reaction mixture about 1 mol to about 25 mols of a cationic polymerization initiator per 1000 mols of dicyclopentadiene.
Claim 2
Dependent Claim
96 words
In a method for making a thermoset polymer wherein a plurality of reactant streams, one of which contains the activator of a metathesis catalyst system combined with a moderator, and a second of which contains the catalyst of said metathesis catalyst system and at least one of which contains dicyclopentadiene, are combined to form a reaction mixture, and the reaction mixture is then injected into a mold where polymerization occurs, the improvement which comprises adding to the reaction mixture about 1 mol to about 25 mols of a cationic polymerization initiator per 1000 mols of dicyclopentadiene.
Claim 3
Dependent Claim
11 words
The method of claim 1 wherein the initiator is tin tetrachloride.
Claim 4
Dependent Claim
23 words
The method of claim 2 wherein the amount of initiator added is from 1 to about 5 mols per 1000 mols of dicyclopentadiene.
Claim 5
Dependent Claim
18 words
The method of claim 1 wherein the cationic polymerization initiator is added as part of the catalyst stream.
Claim 6
Dependent Claim
16 words
The method of claim 1 wherein the cationic polymerization initiator is added as a separate stream.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-29 | 1992-11-28 | 1993-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-29 | 1996-11-28 | 1997-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-29 | 2000-11-28 | 2001-05-30 | $7700.00 | Window Closed / Lapsed |