US4520181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making a dicyclopentadiene thermoset polymer containig elastomer
Assignee: Metton America Inc
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Filing: 1983-03-07
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Granted: 1985-05-28
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Expires: 2003-03-07
Abstract
Abstract A method of making a thermoset polydicyclopentadiene by first combining a plurality of reactant streams, one containing the activator of a metathesis-catalyst system, a second containing the catalyst of a metathesis-catalyst system and at least one containing dicylopentadiene; then immediately injecting this combination into a mold where polymerization results in the formation of a tough, rigid thermoset polymer with high modulus and excellent impact strength.
Inventors
- 👤 Daniel W. Klosiewicz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:35
CPC Classifications
C; C08; C08G; C08G61/00; C08G61/02; C08G61/04; C08G61/06; C08G61/08
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
100 words
A method of making a thermoset homopolymer comprising: (a) combining a plurality of reactant streams, one of said streams containing an activator of a metathesis-catalyst system, and another of said streams containing a catalyst of a metathesiscatalyst system, at least one of said streams containing dicyclopentadiene, at least one of said streams containing elastomer, whereby a reaction mixture is formed, said elastomer being sufficient in amount to make the viscosity of said reaction mixture between about 300 and about 1000 centipoises; (b) immediately injecting said reaction mixture into a mold where polymerization occurs, forming a thermoset dicyclopentadiene homopolymer containing elastomer.
Claim 2
Independent Claim
100 words
A method of making a thermoset homopolymer comprising: (a) combining a plurality of reactant streams, one of said streams containing an activator of a metathesis-catalyst system, and another of said streams containing a catalyst of a metathesiscatalyst system, at least one of said streams containing dicyclopentadiene, at least one of said streams containing elastomer, whereby a reaction mixture is formed, said elastomer being sufficient in amount to make the viscosity of said reaction mixture between about 300 and about 1000 centipoises; (b) immediately injecting said reaction mixture into a mold where polymerization occurs, forming a thermoset dicyclopentadiene homopolymer containing elastomer.
Claim 3
Dependent Claim
14 words
The method of claim 1 wherein said reaction mixture further comprises a rate moderator.
References Cited (Backward Citations)
US3873644A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-05-27 | 1988-11-26 | 1989-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-27 | 1992-11-26 | 1993-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-27 | 1996-11-26 | 1997-05-28 | $7700.00 | Window Closed / Lapsed |