US3870690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the polymerization of alpha-olefins
Assignee: Hoechst AG
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Filing: 1973-04-10
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Granted: 1975-03-11
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Expires: 1993-04-10
Abstract
Abstract The invention relates to a process for the preparation of olefin polymers using a modified Ziegler-catalyst. As modifiers cyclic dipeptides are used. Polymers are obtained in a high yield having good crystallinity and good color quality.
Inventors
- 👤 Wolfgang Gordon
- 👤 Kurt Rust
- 👤 Erwin Schrott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:34
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
101 words
In a process for the preparation of a crystalline polyolefin by polymerization of at least one Alpha -olefin of the formula CH2 CH-R, wherein R represents an aliphatic radical having one to four carbon atoms, in suspension or in the gas phase, at a temperature of from 20* to 130*C. and a pressure of from 1 to 50 kg/cm2, the improvement which comprises carrying out the polymerization in the presence of a mixed catalyst prepared from a. a halogen compound of trivalent titanium (component A) b. a halogen-free organo-aluminum compound (component B) and c. a cyclic dipeptide derivative of the formula
Claim 2
Dependent Claim
101 words
In a process for the preparation of a crystalline polyolefin by polymerization of at least one Alpha -olefin of the formula CH2 CH-R, wherein R represents an aliphatic radical having one to four carbon atoms, in suspension or in the gas phase, at a temperature of from 20* to 130*C. and a pressure of from 1 to 50 kg/cm2, the improvement which comprises carrying out the polymerization in the presence of a mixed catalyst prepared from a. a halogen compound of trivalent titanium (component A) b. a halogen-free organo-aluminum compound (component B) and c. a cyclic dipeptide derivative of the formula
Claim 3
Dependent Claim
99 words
IN A PROCESS FOR THE PREPARING OF A CRYSTALLINE POLYOLEFIN BY POLYMERIZATION OF AT LEAST ONE A-OLEFIN OF THE FORMULA CH2=CH-R, WHEREIN R REPRESENTTS AN ALIPHATIC RADICAL HAVING ONE TO FOUR CARBON ATOMS, IN SUSPENSION OR IN THE GAS PHASE, AT A TEMPERATURE OF FROM 20* TO 130*C. AND A PRESSURE OF FROM 1 TO 50 KG/CM2, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT THE POLYMERIZATION IN THE PRESENCE OF A MIXED CATALYST PREPARED FROM A. A HALOGEN COMPOUND OF TRIVALENT TITANIUM (COMPONENT A) B. A HALOGEN-FREE ORGANO-ALUMINUM COMPOUND (COMPONENT b) AND C. A CYCLIC DIPEPTIDE DERIVATIVE OF THE FORMULA
Claim 4
Dependent Claim
99 words
IN A PROCESS FOR THE PREPARING OF A CRYSTALLINE POLYOLEFIN BY POLYMERIZATION OF AT LEAST ONE A-OLEFIN OF THE FORMULA CH2=CH-R, WHEREIN R REPRESENTTS AN ALIPHATIC RADICAL HAVING ONE TO FOUR CARBON ATOMS, IN SUSPENSION OR IN THE GAS PHASE, AT A TEMPERATURE OF FROM 20* TO 130*C. AND A PRESSURE OF FROM 1 TO 50 KG/CM2, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT THE POLYMERIZATION IN THE PRESENCE OF A MIXED CATALYST PREPARED FROM A. A HALOGEN COMPOUND OF TRIVALENT TITANIUM (COMPONENT A) B. A HALOGEN-FREE ORGANO-ALUMINUM COMPOUND (COMPONENT b) AND C. A CYCLIC DIPEPTIDE DERIVATIVE OF THE FORMULA
Claim 5
Dependent Claim
101 words
In a process for the preparation of a crystalline polyolefin by polymerization of at least one Alpha -olefin of the formula CH2 CH-R, wherein R represents an aliphatic radical having one to four carbon atoms, in suspension or in the gas phase, at a temperature of from 20* to 130*C. and a pressure of from 1 to 50 kg/cm2, the improvement which comprises carrying out the polymerization in the presence of a mixed catalyst prepared from a. a halogen compound of trivalent titanium (component A) b. a halogen-free organo-aluminum compound (component B) and c. a cyclic dipeptide derivative of the formula
Claim 6
Dependent Claim
101 words
In a process for the preparation of a crystalline polyolefin by polymerization of at least one Alpha -olefin of the formula CH2 CH-R, wherein R represents an aliphatic radical having one to four carbon atoms, in suspension or in the gas phase, at a temperature of from 20* to 130*C. and a pressure of from 1 to 50 kg/cm2, the improvement which comprises carrying out the polymerization in the presence of a mixed catalyst prepared from a. a halogen compound of trivalent titanium (component A) b. a halogen-free organo-aluminum compound (component B) and c. a cyclic dipeptide derivative of the formula
Claim 7
Dependent Claim
32 words
The process as claimed in claim 1, wherein the monomers are introduced at the same time into the polymerization, and from 0.5 to 6 percent by weight of ethylene is additionally used.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |