US3873644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Graft polymers
Assignee: Bayer AG
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Filing: 1971-12-21
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Granted: 1975-03-25
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Expires: 1991-12-21
Abstract
Abstract Method for producing graft polymers from a cyclic olefin as graft monomer and from a polymer containing carbon-carbon double bonds as the grafting base wherein the grafting reaction is effected by a catalyst comprising A. A COMPOUND OF A METAL OF Group VB or VIB of the Mendeleev Periodic System, and B. AN ORGANIC COMPOUND OF A METAL OF Group IA to IIIA of the Mendeleev Periodic System. AND GRAFT POLYMERS OBTAINED IN THIS PROCESS.
Inventors
- 👤 Gottfried Pampus
- 👤 Josef Witte
- 👤 Martin Hoffmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:59
CPC Classifications
C; C08; C08G; C08G61/00; C08G61/02; C08G61/04; C08G61/06; C08G61/08; C08F; C08F279/00; C08F279/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
97 words
A PROCESS FOR THE PRODUCTION OF GRAFT POLYMERS WHICH COMPRISES POLYMERIZING, AS GRAFT MONOMER, A CYCLIC OLEFIN CONTAINING 4, 5 OR FROM 7 TO 20 CARBON ATOMS IN THE RING AND HAVING ONE CARBON TO CARBON DOUBLE BOND OR TWO OR MORE UNCONJUGATED CARBON TO CARBON DOUBLE BONDS ONTO A GRAFT BASE POLYMER CONTAINING CARBON TO CARBON DOUBLE BONDS, SAID POLYMERIZATION BEING CARRIED OUT IN AN INERT ORGANIC SOLVENT AT -60 TO 60*C. AND IN THE PRESENCE OF A CATALYST COMPRISING A. A TUNGSTEN, TANTALUM OR MOLYBDENUM HALIDE OR OXYHALIDE, B. AN ORGANOALUMINUM COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
97 words
A PROCESS FOR THE PRODUCTION OF GRAFT POLYMERS WHICH COMPRISES POLYMERIZING, AS GRAFT MONOMER, A CYCLIC OLEFIN CONTAINING 4, 5 OR FROM 7 TO 20 CARBON ATOMS IN THE RING AND HAVING ONE CARBON TO CARBON DOUBLE BOND OR TWO OR MORE UNCONJUGATED CARBON TO CARBON DOUBLE BONDS ONTO A GRAFT BASE POLYMER CONTAINING CARBON TO CARBON DOUBLE BONDS, SAID POLYMERIZATION BEING CARRIED OUT IN AN INERT ORGANIC SOLVENT AT -60 TO 60*C. AND IN THE PRESENCE OF A CATALYST COMPRISING A. A TUNGSTEN, TANTALUM OR MOLYBDENUM HALIDE OR OXYHALIDE, B. AN ORGANOALUMINUM COMPOUND OF THE FORMULA
Claim 3
Dependent Claim
17 words
A process as claimed in claim 1 wherein the graft base is a diene homopolymer or copolymer.
Claim 4
Dependent Claim
17 words
A process as claimed in claim 1 wherein the graft base is polybutadiene or a butadiene-styrene copolymer.
Claim 5
Dependent Claim
17 words
A process as claimed in claim 1 wherein the graft base is an isoprene homopolymer or copolymer.
Claim 6
Dependent Claim
13 words
A process as claimed in claim 1 wherein the cyclic olefin is cyclopentene.
Claim 7
Dependent Claim
25 words
A process as claimed in claim 1 wherein the graft base is 0.1 to 90 % by weight of the total of monomer and polymer.
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) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |