US4002815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cyclopentene-dicyclopentadiene copolymers and method of making same
Assignee: Goodrich Corp
•
Filing: 1975-04-03
•
Granted: 1977-01-11
•
Expires: 1995-04-03
Abstract
Abstract Substantially gel-free copolymers of cyclopentene with dicyclopentadiene are prepared by polymerizing these monomers in the presence of (1) a catalyst comprising (a) at least one compound selected from the group consisting of dialkylaluminum iodides, alkylaluminum diiodides and mixtures of trialkylaluminum compounds with elemental iodine and (b) at least one solvent- or monomer-soluble tungsten compound, and (2) at least one nonconjugated acyclic olefin having at least one hydrogen on each double-bonded carbon atom. Catalyst component (a) is charged before catalyst component (b).
Inventors
- 👤 Robert J. Minchak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:10
CPC Classifications
C; C08; C08G; C08G61/00; C08G61/02; C08G61/04; C08G61/06; C08G61/08; Y; Y10; Y10S; Y10S526/00; Y10S526/916
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
72 words
A copolymer comprising cyclopentene, dicyclopentadiene and from about 0.01 to about 0.3 mole of at least one nonconjugated acyclic olefin polymerized therewith per mole of total cyclopentene and dicyclopentadiene monomer, said nonconjugated acyclic olefin having at least one hydrogen on each double-bonded carbon atom and 2 to 12 carbon atoms, and said dicyclopentadiene being present in an amount from about 55% to about 98% by weight of the total weight of copolymer.
Claim 2
Dependent Claim
72 words
A copolymer comprising cyclopentene, dicyclopentadiene and from about 0.01 to about 0.3 mole of at least one nonconjugated acyclic olefin polymerized therewith per mole of total cyclopentene and dicyclopentadiene monomer, said nonconjugated acyclic olefin having at least one hydrogen on each double-bonded carbon atom and 2 to 12 carbon atoms, and said dicyclopentadiene being present in an amount from about 55% to about 98% by weight of the total weight of copolymer.
Claim 3
Dependent Claim
26 words
A copolymer of claim 1 wherein dicyclopentadiene is present in an amount from about 60% to about 80% by weight of the total weight of copolymer.
Claim 4
Dependent Claim
22 words
A copolymer of claim 2 wherein said nonconjugated acyclic olefin is a 1-olefin or 2-olefin containing from 2 to 8 carbon atoms.
Claim 5
Dependent Claim
10 words
A copolymer of claim 3 wherein said 1-olefin is 1-butene.
References Cited (Backward Citations)
US3074918A
Cited
US3684781A
Cited
US3687921A
Cited
US3778420A
Cited
US3790543A
Cited
US3790545A
Cited
US3853830A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-01-11 | 1980-07-12 | 1981-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-11 | 1984-07-12 | 1985-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-11 | 1988-07-12 | 1989-01-11 | $7700.00 | Window Closed / Lapsed |