Patent EP0076535A1 successfully refreshed from Google Patents.
EP0076535A1
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EP
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Process for polymerising conjugate diolefins, and means suitable for this purpose
Assignee: Enichem Elastomeri SpA
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Filing: 1982-09-15
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Granted: —
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Expires: 2002-09-15
Abstract
Abstract An improved process is described for preparing conjugate diolefin polymers or copolymers having a high content of 1,4-cis units and high chain linearity, the process using a particular catalytic system prepared from a compound of a metal chosen from those of Group III B of the Periodic System which have an atomic number of between 21 and 103, preferably neodymium, as organic halogen derivative, and an aluminium alkylhydride or trialkyl.
Inventors
- 👤 Antonio Carbonaro
- 👤 Domenico Ferraro
- 👤 Mario Bruzzone
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 04:05
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
157 words
A catalytic system for conjugate diolefin polymerisation or copolymerisation, prepared from a) at least one compound of a metal of Group III B of the Periodic System of elements having an atomic number of between 21 and 103; b) an organic halogen derivative of general formula: in which X is Cl or Br; R is H, alkyl, aryl, alkylaryl, chloro or bromo alkyl, alkoxy or epoxy; R' is alkyl, aryl, H, Cl or Br; R" is alkyl,aryl,vinyl,chloro or bromo alkyl, chloro or bromo aryl,Cl or Br; or R'+R" is oxygen, or saturated or unsaturated cycloalkyl; if R=R'=H, then R" is only of aromatic nature; c) organometallic aluminium compounds not containing halide ions, of formula: in which R a and R b , which can be the same or different, are a saturated hydrocarbon radical, and R c is hydrogen or a hydrocarbon radical which can be the same as or different from R or R b .
Claim 2
Dependent Claim
157 words
A catalytic system for conjugate diolefin polymerisation or copolymerisation, prepared from a) at least one compound of a metal of Group III B of the Periodic System of elements having an atomic number of between 21 and 103; b) an organic halogen derivative of general formula: in which X is Cl or Br; R is H, alkyl, aryl, alkylaryl, chloro or bromo alkyl, alkoxy or epoxy; R' is alkyl, aryl, H, Cl or Br; R" is alkyl,aryl,vinyl,chloro or bromo alkyl, chloro or bromo aryl,Cl or Br; or R'+R" is oxygen, or saturated or unsaturated cycloalkyl; if R=R'=H, then R" is only of aromatic nature; c) organometallic aluminium compounds not containing halide ions, of formula: in which R a and R b , which can be the same or different, are a saturated hydrocarbon radical, and R c is hydrogen or a hydrocarbon radical which can be the same as or different from R or R b .
Claim 3
Dependent Claim
23 words
A catalytic system as claimed in the preceding claim, wherein component a) is chosen from neodymium compounds or praseodymium compounds, or their mixtures.
Claim 4
Dependent Claim
35 words
A catalytic system as claimed in claim 1, characterised in that in component c), R a and R are a saturated or unsaturated linear or branched alkyl residue, containing from 1 to 18 carbon atoms.
Claim 5
Dependent Claim
20 words
A catalytic system as claimed in claim 1, characterised in that in component c) R c is an alkyl radical.
Claim 6
Dependent Claim
31 words
A catalytic system as claimed in the preceding claims, characterised in that the molar ratio of the organic halogen derivative to the metal compound is equal to or greater than 0.33.
Claim 7
Dependent Claim
30 words
A catalytic system as claimed in the preceding claims, characterised in that the molar ratio of the aluminium compound to the metal compound is equal to or greater than 20.
Claim 8
Dependent Claim
29 words
A catalytic system as claimed in claim 5, characterised in that the molar ratio of the organic halogen derivative to the metal compound varies preferably between 0.5 and 3.
Claim 9
Dependent Claim
28 words
A catalytic system as claimed in claim 6, characterised in that the molar ratio of the aluminium compound to the metal compound varies preferably between 30 and 200.
Claim 10
Dependent Claim
27 words
A process for polymerising or copolymerising conjugate diolefins, consisting of carrying out the reaction in the presence of the catalytic system as claimed in the preceding claims.
Claim 11
Dependent Claim
22 words
A process as claimed in the preceding claims, characterised in that the reaction is carried out in the presence of hydrocarbon solvents.
Claim 12
Dependent Claim
25 words
A process as claimed in the preceding claim, characterised in that the reaction is carried out in the presence of preferably aliphatic or cycloaliphatic hydrocarbons.
Claim 13
Dependent Claim
20 words
A process as claimed in claim 9, characterised in that the reaction is carried out in the absence of diluents.
Claim 14
Dependent Claim
24 words
A process as claimed in the preceding claims, characterised in that the reaction is carried out at a temperature of between 0 and 200°C.
References Cited (Backward Citations)
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