US5017539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of butadiene
Assignee: Enichem Elastomers Ltd
•
Filing: 1989-12-22
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Granted: 1991-05-21
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Expires: 2009-12-22
Abstract
Abstract A process for preparing a catalyst for the polymerization of butadiene to obtain a polymer containing a very high content of cis isomer in which a specified neodymium carboxylate, an aluminium hydrocarbyl or aluminium hydrocarbyl hydride and a source of halogen are contacted using a particular procedure.
Inventors
- 👤 Derek K. Jenkins
- 👤 Peter J. Ansell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:15
CPC Classifications
C; C08; C08F; C08F136/00; C08F136/02; C08F136/04; C08F136/06
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
80 words
A process for preparing a catalyst for the polymerisation of butadiene comprising contacting in hydrocarbon solvent (a) an aluminum hydrocarbyl (other than aluminium triethyl) or an aluminium hydrocarbyl hydride, (b) neodymium neodecanoate or neodymium naphthenate and (c) a source of halogen, the contacting and subsequent mixing being carried out at a temperature of -15° C. to -60° C., and ageing the catalyst for a period of at least 8 hours at -20° C. to -40° C. before use in polymerisation.
Claim 2
Dependent Claim
80 words
A process for preparing a catalyst for the polymerisation of butadiene comprising contacting in hydrocarbon solvent (a) an aluminum hydrocarbyl (other than aluminium triethyl) or an aluminium hydrocarbyl hydride, (b) neodymium neodecanoate or neodymium naphthenate and (c) a source of halogen, the contacting and subsequent mixing being carried out at a temperature of -15° C. to -60° C., and ageing the catalyst for a period of at least 8 hours at -20° C. to -40° C. before use in polymerisation.
Claim 3
Dependent Claim
22 words
A process according to claim 1 wherein the catalyst is prepared using the order hydrocarbon solvent, component (a), component (b), component (c).
Claim 4
Dependent Claim
20 words
A process according to claim 1 or claim 2 wherein the catalyst is prepared using neodymium neodecanoate as component (b).
Claim 5
Dependent Claim
22 words
A process according to any one of claims 1 to 3 wherein the catalyst is prepared at -20° C. to -40° C.
Claim 6
Dependent Claim
96 words
A process for preparing a catalyst for the polymerisation of butadiene comprising contacting in hydrocarbon solvent (a) an aluminium hydrocarbyl (other than aluminium triethyl) or an aluminium hydrocarbyl hydride, (b) neodymium neodecanoate or neodymium naphthenate and (c) a source of halogen, the contacting and subsequent mixing being carried out at a temperature of -15° C. to -60° C., and ageing the catalyst for a period of at least 8 hours at -20° C. to -40° C. before use in polymerisation, wherein the catalyst is prepared using the order hydrocarbon solvent, component (a), component (b), component (c).
Claim 7
Dependent Claim
96 words
A process for preparing a catalyst for the polymerisation of butadiene comprising contacting in hydrocarbon solvent (a) an aluminium hydrocarbyl (other than aluminium triethyl) or an aluminium hydrocarbyl hydride, (b) neodymium neodecanoate or neodymium naphthenate and (c) a source of halogen, the contacting and subsequent mixing being carried out at a temperature of -15° C. to -60° C., and ageing the catalyst for a period of at least 8 hours at -20° C. to -40° C. before use in polymerisation, wherein the catalyst is prepared using the order hydrocarbon solvent, component (a), component (b), component (c).
Claim 8
Dependent Claim
17 words
A process according to claim 5 wherein the catalyst is prepared using neodymium neodecanoate as components (b).
Claim 9
Dependent Claim
22 words
A process according to any one of claims 5 and 6 wherein the catalyst is prepared at -20° C. to -40° C.
Claim 10
Dependent Claim
80 words
A process for preparing a catalyst for the polymerisation of butadiene comprises contacting in hydrocarbon solvent (a) an aluminium hydrocarbyl (other than aluminium triethyl) or an aluminium hydrocarbyl hydride, (b) neodymium neodecanoate or neodymium naphthenate and (c) a source of halogen, the contacting and subsequent mixing being carried out at a temperature of -20° C. to -40° C., and ageing the catalyst for a period of at least 8 hours at -20° C. to -40° C. before use in polymerisation.
Claim 11
Dependent Claim
80 words
A process for preparing a catalyst for the polymerisation of butadiene comprises contacting in hydrocarbon solvent (a) an aluminium hydrocarbyl (other than aluminium triethyl) or an aluminium hydrocarbyl hydride, (b) neodymium neodecanoate or neodymium naphthenate and (c) a source of halogen, the contacting and subsequent mixing being carried out at a temperature of -20° C. to -40° C., and ageing the catalyst for a period of at least 8 hours at -20° C. to -40° C. before use in polymerisation.
Claim 12
Dependent Claim
22 words
A process according to claim 8 wherein the catalyst is prepared using the order hydrocarbon solvent, component (a), component (b), component (c).
Claim 13
Dependent Claim
20 words
The process according to claim 8 or claim 9 wherein the catalyst is prepared using neodymium neodecanoate as component (b).
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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) | 1994-05-20 | 1994-11-19 | 1995-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-20 | 1998-11-19 | 1999-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-20 | 2002-11-19 | 2003-05-21 | $7700.00 | Window Closed / Lapsed |