US3816382A
Expired / Lapsed
US
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Polyalkenamers and process for the preparation thereof
Assignee: Huels AG
•
Filing: 1970-09-08
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Granted: 1974-06-11
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Expires: 1990-09-08
Abstract
Abstract The molecular weight of polyalkenamers produced by the ringopening polymerization of cyclic olefins can be regulated by conducting at least a portion of the polymerization reaction in the presence of a hydrocarbon monoolefin of the formula WHEREIN R1, R2 and R3 are hydrogen, saturated alkyl or cycloalkyl or aryl. Novel polyalkenamers thus produced include those formed of 2 to 50,000 polymer units of one of the formulae WHEREIN R is H, alkyl, cycloalkyl or aryl; m is 2,3 or 5-10; n and o are each 1-7 and their sum is 3-8; and p, q, and r are 12.
Inventors
- 👤 R Streck
- 👤 H Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:56
CPC Classifications
C; C08; C08G; C08G61/00; C08G61/02; C08G61/04; C08G61/06; C08G61/08
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
17 words
A process according to claim 1 wherein at least one of R1, R2 and R3 is hydrogen.
Claim 2
Dependent Claim
17 words
A process according to claim 2 wherein at least two of R1, R2 and R3 are hydrogen.
Claim 3
Dependent Claim
19 words
A process according to claim 1 wherein at least one of R1, R2 and R3 is an aryl group.
Claim 4
Dependent Claim
15 words
A process according to claim 4 wherein each such aryl group is a phenyl group.
Claim 5
Dependent Claim
13 words
A process according to claim 5 wherein each such phenyl group is unsubstituted.
Claim 6
Dependent Claim
30 words
A process according to claim 1 wherein at least one of R1, R2 and R3 is an alkyl group and each such alkyl group contains 1 to 8 carbon atoms.
Claim 7
Dependent Claim
18 words
A process according to claim 1 wherein the olefin polymerization regulator is added after initiation of the polymerization.
Claim 8
Dependent Claim
27 words
A process according to claim 1 wherein the olefin polymerization regulator is employed in an amount of 10 to 20 mol-percent based on the cyclic monomer used.
Claim 9
Dependent Claim
12 words
A process according to claim 1 wherein the cyclic monomer is cyclooctene.
Claim 10
Dependent Claim
12 words
A process according to claim 1 wherein the cyclic monomer is cyclooctadiene.
Claim 11
Dependent Claim
12 words
A process according to claim 1 wherein the cyclic monomer is cyclododecene.
Claim 12
Dependent Claim
12 words
A process according to claim 1 wherein the cyclic monomer is norbornene.
Claim 13
Dependent Claim
84 words
In a process for the production of polyalkenamers by the catalyzed ring-opening polymerization of cyclic olefins containing 4-12 ring carbon atoms employing a ring-opening catalyst of a metal of Subgroups 5 through 7 of the periodic table, the improvement which comprises producing low-viscosity to oily fluid products by regulating the molecular weight of the polyalkenamer by adding to the polymerization charge, prior to to polymerization, between 7 and 50 molar percent, based on the cyclic olefin, of an olefin polymerization regulator of the formula
Claim 14
Dependent Claim
11 words
The process of claim 14 wherein the cyclic monomer is cyclopentene.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |