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US4604408A
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Composition for making cellular thermoset polymerized dicyclopentadiene polymer
Assignee: Hercules LLC
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Filing: 1985-06-17
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Granted: 1986-08-05
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Expires: 2005-06-17
Abstract
Abstract A composition for making a cellular thermoset polymer comprised of polymerized units of dicyclopentadiene monomer. The composition includes dicyclopentadiene, a catalyst, and a blowing agent.
Inventors
- 👤 Norman R. Newburg, deceased
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:23
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08G; C08G61/00; C08G61/02; C08G61/04; C08G61/06; C08G61/08; C08J9/0066; C08J9/04; C08J9/12; C08J9/14; C08J2345/00; C08J2421/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
71 words
A cellular thermoset polymer product produced by the process comprising (a) providing a polymerization mixture comprising: dicyclopentadiene; a catalyst; and a blowing agent wherein said catalyst comprises a tungsten compound selected from the group consisting of a tungsten halide and a tungsten oxyhalide; (b) providing a heated mold; (c) polymerizing said polymerization mixture in said mold, to form said cellular thermoset polymer product, said polymer product comprising polymerized units of dicyclopentadiene.
Claim 2
Dependent Claim
71 words
A cellular thermoset polymer product produced by the process comprising (a) providing a polymerization mixture comprising: dicyclopentadiene; a catalyst; and a blowing agent wherein said catalyst comprises a tungsten compound selected from the group consisting of a tungsten halide and a tungsten oxyhalide; (b) providing a heated mold; (c) polymerizing said polymerization mixture in said mold, to form said cellular thermoset polymer product, said polymer product comprising polymerized units of dicyclopentadiene.
Claim 3
Dependent Claim
14 words
The product of claim 1 wherein said polymerization mixture further comprises a nucleating agent.
Claim 4
Dependent Claim
25 words
The product of claim 1 further comprising a nucleating agent, wherein said nucleating agent is talc, magnesium carbonate, barium carbonate, zinc carbonate or lead carbonate.
Claim 5
Dependent Claim
27 words
The product of claim 1 further comprising a nucleating agent, wherein said nucleating agent is magnesium oxide, calcium oxide, barium oxide, zinc oxide, lead oxide or silica.
Claim 6
Dependent Claim
40 words
The product of claim 1 wherein said polymerization mixture further comprises up to about 10% based on the weight of dicyclopentadiene of another monomer selected from the group consisting of norbornene and norbornadiene, wherein said cells are small and uniform.
Claim 7
Dependent Claim
8 words
The product of claim 1 further comprising activator.
Claim 8
Dependent Claim
16 words
The product of claim 1 wherein said mold is heated to between 60° and 150° C.
Claim 9
Dependent Claim
11 words
The product of claim 1 wherein said catalyst comprises tungsten hexachloride.
Claim 10
Dependent Claim
11 words
The product of claim 1 wherein said catalyst comprises tungsten oxychloride.
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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) | 1989-08-04 | 1990-02-03 | 1990-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-04 | 1994-02-03 | 1994-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-04 | 1998-02-03 | 1998-08-05 | $7700.00 | Window Closed / Lapsed |