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US4429089A
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Polymerizing and copolymerizing diolefines, and means therefor
Assignee: Enichem Elastomeri SpA
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Filing: 1981-07-15
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Granted: 1984-01-31
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Expires: 2001-07-15
Abstract
Abstract A novel catalytic system is disclosed which is especially adapted for the polymerization and the copolymerization of aliphatic conjugated diolefines, the system comprising an organic compound of aluminum, a Lewis acid containing at least one halogen, and an organic compound of a lanthanide metal. The catalyst system has outstanding and hitherto unparalleled activity. The method of preparation of the catalytic system is also described in detail.
Inventors
- 👤 Ugo Pedretti
- 👤 Gabriele Lugli
- 👤 Sergio Poggio
- 👤 Alessandro Mazzei
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:39
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
107 words
Method for the polymerization or copolymerization of butadiene or isoprene consisting in carrying out the reaction in the presence of a catalytic system composed of: (A) an aluminum trialkyl having the formula, AlR.sub.3 wherein R is an alkyl radical containing from 1 to 20 carbon atoms, (B) an aluminum halide or alkyl aluminum halide having the formula AlX.sub.a R.sub.3-a wherein R is an alkyl radical containing from 1 to 20 carbon atoms, X is chlorine or bromine and a is an integer from 1 to 3, and (C) Neodymium alcoholate having the formula, Nd(OR).sub.3 wherein R is an alkyl radical containing from 1 to 20 carbon atoms.
Claim 2
Dependent Claim
107 words
Method for the polymerization or copolymerization of butadiene or isoprene consisting in carrying out the reaction in the presence of a catalytic system composed of: (A) an aluminum trialkyl having the formula, AlR.sub.3 wherein R is an alkyl radical containing from 1 to 20 carbon atoms, (B) an aluminum halide or alkyl aluminum halide having the formula AlX.sub.a R.sub.3-a wherein R is an alkyl radical containing from 1 to 20 carbon atoms, X is chlorine or bromine and a is an integer from 1 to 3, and (C) Neodymium alcoholate having the formula, Nd(OR).sub.3 wherein R is an alkyl radical containing from 1 to 20 carbon atoms.
Claim 3
Dependent Claim
41 words
A method according to claim 1 wherein the reaction is carried our with an amount of catalyst, referred to the metal Neodymium, which varies from 0.015 to 10 -3 to 0.5×10 -3 gramatoms of Neodymium alcoholate per 100 grams of monomer.
Claim 4
Dependent Claim
25 words
A method according to claim 1 wherein the molar ratio of component A to component C of the catalytic system is between 1 and 120.
Claim 5
Dependent Claim
23 words
A method according to claim 1 wherein the atomic ratio of the halogen ions to the Neodymium alcoholate varies from 0.1 to 10.
Claim 6
Dependent Claim
23 words
A method according to claim 1 wherein the reaction is carried out at a temperature which varies from -50° C. to +150° C.
Claim 7
Dependent Claim
22 words
A method according to claim 1 wherein the reaction is carried out at a pressure which varies from 1 to 20 atmospheres.
Claim 8
Dependent Claim
28 words
A method according to claim 1 wherein the reaction is carried out in the presence of solvents selected from the group consisting of aliphatic, aromatic and cycloaliphatic hydrocarbons.
Claim 9
Dependent Claim
24 words
A method according to claim 1 wherein the reaction is carried out in the absence of solvent and in the presence of monomer alone.
Claim 10
Dependent Claim
21 words
A method according to claim 1 wherein the reaction is carried out at a temperature between +10° C. and 80° C.
Claim 11
Dependent Claim
20 words
A method according to claim 1 wherein the reaction is carried out at a pressure from 1 to 5 atmospheres.
Claim 12
Dependent Claim
93 words
Catalyst system for polymerizing or copolymerizing butadiene or isoprene composed of: (A) an aluminum trialkyl having the formula AlR.sub.3 wherein R is an alkyl radical containing from 1 to 20 carbon atoms, (B) an aluminum halide or alkyl aluminum halide having the formula AlX.sub.a R.sub.3-a wherein R is an alkyl radical containing from 1 to 20 carbon atoms, X is chlorine or bromine and a is an integer from 1 to 3, and (C) Neodymium alcoholate having the formula, Nd(OR).sub.3 wherein R is an alkyl radical containing from 1 to 20 carbon atoms.
Claim 13
Dependent Claim
93 words
Catalyst system for polymerizing or copolymerizing butadiene or isoprene composed of: (A) an aluminum trialkyl having the formula AlR.sub.3 wherein R is an alkyl radical containing from 1 to 20 carbon atoms, (B) an aluminum halide or alkyl aluminum halide having the formula AlX.sub.a R.sub.3-a wherein R is an alkyl radical containing from 1 to 20 carbon atoms, X is chlorine or bromine and a is an integer from 1 to 3, and (C) Neodymium alcoholate having the formula, Nd(OR).sub.3 wherein R is an alkyl radical containing from 1 to 20 carbon atoms.
Claim 14
Dependent Claim
32 words
Catalytic system according to claim 11 wherein the amount of catalyst referred to the metal Neodymium varies from 0.015×10 -3 to 0.5×10 -3 gramatoms of Neodymium alcoholate per 100 grams of monomer.
Claim 15
Dependent Claim
25 words
Catalytic system according to claim 11 wherein the molar ratio of component A to component C of the catalytic system is between 1 and 120.
Claim 16
Dependent Claim
23 words
Catalytic system according to claim 11 wherein the atomic ratio of the halogen ions to the Neodymium alcoholate varies from 0.1 to 10.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1987-01-30 | 1987-08-01 | 1988-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-30 | 1991-08-01 | 1992-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-30 | 1995-08-01 | 1996-01-31 | $7700.00 | Window Closed / Lapsed |