US3678023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of free-flowing, granular, atactic polybutene-1
Assignee: Huels AG
•
Filing: 1970-09-25
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Granted: 1972-07-18
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Expires: 1990-09-25
Abstract
Abstract Free-flowing, granular atactic polybutene-1 is produced by lowpressure polymerizing butene-1 with a mixed titanium or vanadium halide and alkylaluminum catalyst to a solids content of up to 200 g./l. using a liquefied gas as diluent; and thereafter adding an alkanol of one to four carbon atoms to the polymerization mixture in an amount at least 4 times the weight of the polymer under high agitation.
Inventors
- 👤 Albert Frese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:38
CPC Classifications
C; C08; C08F; C08F10/00; C08F10/14
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
11 words
A process according to claim 1, wherein the alkanol is methanol.
Claim 2
Dependent Claim
34 words
A process according to claim 1, wherein the polymerization mixture is mixed with 5 to 8 times by weight, based on the polymer, of the alkanol at a temperature of 10* - 40* C.
Claim 3
Dependent Claim
28 words
A process according to claim 3, wherein the polymerization mixture is first mixed with a minor proportion of the alkanol and thereafter with the larger volume of alkanol.
Claim 4
Dependent Claim
22 words
A process according to claim 1, wherein the polymerization is conducted in a polymerization solvent consisting essentially of at least one C4-hydrocarbon.
Claim 5
Dependent Claim
13 words
A process according to claim 5, wherein the solvent is a C4-petroleum cut.
Claim 6
Dependent Claim
32 words
A process according to claim 1, the polymerization mixture is mixed with the alkanol in the presence of 0.1 - 50percent by weight, based on the polymer of a finely divided filler.
Claim 7
Dependent Claim
55 words
A process according to claim 1, wherein the polymerization is conducted in a C4-petroleum cut as polymerization solvent; the polymerization mixture is mixed with 5 to 8 times by weighT, based on the polymer, of the alkanol at a temperature of 10* -40* C.; and drying the separated polymer at about 30* - 40* C.
Claim 8
Dependent Claim
14 words
A process according to claim 8 wherein the polymerization mixture is mixed with methanol.
Claim 9
Dependent Claim
22 words
A process according to claim 9 wherein the polymerization mixture is mixed with methanol at a temperature of about 20* -30* C.
References Cited (Backward Citations)
US3058971A
Cited
US2983720A
Cited
US3001976A
Cited
DE1147755B
Cited
DE1570325A1
Cited
FR1517256A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |