US3897322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiation polymerization of olefinic monomers in the presence of metal containing catalysts
Assignee: Czech Academy of Sciences
•
Filing: 1972-07-26
•
Granted: 1975-07-29
•
Expires: 1992-07-26
Abstract
Abstract Method for the cationic polymerization of at least one olefinic monomer and more particularly the homopolymerization of a monoolefinic monomer such as isobutylene and the copolymerization thereof with a di-olefinic monomer (diene) such as butadiene and optionally another mono-olefinic monomer in the presence of, as initiator of a halide of tetravalent vanadium, titanium and zirconium, an activator and under the influence of visible ultraviolet or infra-red light.
Inventors
- 👤 Miroslav Marek
- 👤 Ludek Toman
- 👤 Jan Pecka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:07
CPC Classifications
C; C08; C08F; C08F10/00; C08F10/04; C08F10/08; C08F10/10; C08F210/00; C08F210/04; C08F210/08; C08F210/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
146 words
A METHOD FOR THE POLYMERIZATION OF ISOBUTYLENE, WHICH COMPRISES SUBJECTING TO A SOURCE OF LIGHT SELECTED FROM THE GROUP CONSISTING OF ULTRAVIOLET LIGHT, VISIBLE LIGHT, AND INFRARE LIGHT AT A TEMPERATURE BETWEEN ABOUT 0*C AND ABOUT -140*C AN ISOBUTYLENE FEED SELECTED FROM THE GROUP CONSISTING OF (A) ESSENTIALLY ISOBUTYLENE AND (B) ESSENTIALLY A MIXTURE OF ISOBUTYLENE AND BUTADIENE IN THE PRESENCE OF AT LEAST ONE HALIDE CATALYST SELECTED FROM THE GROUP CONSISTING OF TETRAVALENT VANADIUM, TITANIUM AND ZIRCONIUM HALIDESAND IN THE PRESENCE OF AT LEAST ONE ACTIVATOR FOR SAID HALIDE CATALYST SELECTED FROM THE GROUP CONSISTING OF (I) AN OXIDE, A HYDROXIDE, AN ALKOXIDE, AND AN ARYLOXIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF (II) THE ALKALI METALS ANDTHE ALKALINE EARTH METALS, THE MOLAR RATIO OF SAID HALIDE CATALYST TO SAID ACTIVATOR RANGING FROM 10-3 PART OF HALIDE CATALYST TO 1 PART OF ACTIVATOR.
Claim 2
Independent Claim
146 words
A METHOD FOR THE POLYMERIZATION OF ISOBUTYLENE, WHICH COMPRISES SUBJECTING TO A SOURCE OF LIGHT SELECTED FROM THE GROUP CONSISTING OF ULTRAVIOLET LIGHT, VISIBLE LIGHT, AND INFRARE LIGHT AT A TEMPERATURE BETWEEN ABOUT 0*C AND ABOUT -140*C AN ISOBUTYLENE FEED SELECTED FROM THE GROUP CONSISTING OF (A) ESSENTIALLY ISOBUTYLENE AND (B) ESSENTIALLY A MIXTURE OF ISOBUTYLENE AND BUTADIENE IN THE PRESENCE OF AT LEAST ONE HALIDE CATALYST SELECTED FROM THE GROUP CONSISTING OF TETRAVALENT VANADIUM, TITANIUM AND ZIRCONIUM HALIDESAND IN THE PRESENCE OF AT LEAST ONE ACTIVATOR FOR SAID HALIDE CATALYST SELECTED FROM THE GROUP CONSISTING OF (I) AN OXIDE, A HYDROXIDE, AN ALKOXIDE, AND AN ARYLOXIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF (II) THE ALKALI METALS ANDTHE ALKALINE EARTH METALS, THE MOLAR RATIO OF SAID HALIDE CATALYST TO SAID ACTIVATOR RANGING FROM 10-3 PART OF HALIDE CATALYST TO 1 PART OF ACTIVATOR.
Claim 3
Dependent Claim
15 words
A method according to claim 1, in which the polymerizable mixture consists essentially of isobutylene.
Claim 4
Dependent Claim
17 words
A method according to claim 1, in which the polymerizable mixture consists essentially of isobutylene and butadiene.
Claim 5
Independent Claim
90 words
A method for the polymerization of isobutylene and mixtures of isobutylene and butadiene, which comprises subjecting isobutylene or mixtures of isobutylene and butadiene to a source of light selected from the group consisting of ultraviolet light, visible light, and infrared light at a temperature between about 0*C. and about -140*C. in the presence of vanadium tetrachloride and in the presence of barium oxide, the molar ratio of said vanadium tetrachloride to said barium oxide ranging from 103 to 10 3 part of vanadium tetrachloride to 1 part of barium oxide.
Claim 6
Independent Claim
90 words
A method for the polymerization of isobutylene and mixtures of isobutylene and butadiene, which comprises subjecting isobutylene or mixtures of isobutylene and butadiene to a source of light selected from the group consisting of ultraviolet light, visible light, and infrared light at a temperature between about 0*C. and about -140*C. in the presence of vanadium tetrachloride and in the presence of barium oxide, the molar ratio of said vanadium tetrachloride to said barium oxide ranging from 103 to 10 3 part of vanadium tetrachloride to 1 part of barium oxide.
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) | 1978-07-28 | 1979-01-27 | 1979-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-28 | 1983-01-27 | 1983-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-28 | 1987-01-27 | 1987-07-29 | $7700.00 | Window Closed / Lapsed |