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US 5,627,119 AGranted
Catalytic system and process for the production of poydiolefins
AssigneesEncichem Elastomeri S.r.l., Eniricerche S.p.A.
InventorsPaolo Biagini, Gabriele Lugli, Fabio Garbassi, Piero Andreussi
Life of this patent
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Abstract
A catalytic system to polymerize diolefinic monomers consists of a lanthanide salt, an organometallic compound of a metal belonging to groups I, II and III of the periodic table of elements and an organometallic compound of boron. The polymers obtained are characterized in that they have a high degree of 1,4 chain units and ratio between 1.4-cis/1,4-trans units which can vary as desired, and also a narrow molecular weight distribution.
Claims14
Catalytic system for the polymerization of dienic monomers, consisting essentially of:
- (A) a salt having the formula
- ML.sub.3
- wherein M represents Sc or Y or a metal with an atomic number between 57 and 71, and L is an anion with the sole exclusion of halogen,
- (B) an alkyl, hydride or alkyl-hydride compound having the formula
- MeR.sup.1.sub.z
- wherein,
- Me is a metal belonging to group I, II or III of the periodic table;
- R.sup.1 is:
- an aliphatic or cycloaliphatic radical containing from 1 to 20 carbon atoms,
- an aromatic radical containing from 6 to 20 carbon atoms, or
- a hydrogen atom,
- z is an integer from 1 to 3 equal to the valence of Me, on condition that, if z is equal to 3, only one of the three R.sup.1 groups bound to the metal can be hydrogen,
- (C) an organometallic derivative of boron having the formula
- BR.sup.2.sub.3-m (C.sub.6 H.sub.5-n R.sup.3.sub.n).sub.m
- wherein,
- R.sup.2 is an aliphatic radical, linear or branched, containing from 1 to 20 carbon atoms;
- a cycloaliphatic group containing from 6 to 20 carbon atoms;
- or an aromatic group containing from 6 to 20 carbon atoms,
- R.sup.3 is a fluorine atom or CF.sub.3 group;
- m is an integer from 1 to 3
- n is an integer from 1 to 5.
18 more elements
Method for the preparation of a catalytic system for the polymerization of dienic monomers, consisting essentially of:
- (A) a salt having the formula
- ML.sub.3
- wherein M represents Sc or Y or a metal with an atomic number between 57 and 71, and L is an anion with the sole exclusion of halogen,
- (B) an alkyl, hydride or alkyl-hydride compound having the formula
- MeR.sup.1.sub.z
- wherein,
- Me is a metal belonging to group I, II or III of the periodic table;
- R.sup.1 is:
- an aliphatic or cycloaliphatic radical containing from 1 to 20 carbon atoms,
- an aromatic radical containing from 6 to 20 carbon atoms, or
- a hydrogen atom,
- z is an integer from 1 to 3 equal to the valence of Me, on condition that, if z is equal to 3, only one of the three R.sup.1 groups bound to the metal can be hydrogen,
- (C) an organometallic derivative of boron having formula
- BR.sup.2.sub.3-m (C.sub.6 H.sub.5-n R.sup.3.sub.n) .sub.m
- wherein,
- R.sup.2 is an aliphatic radical, linear or branched, containing from 1 to 20 carbon atoms;
- a cycloaliphatic group containing from 6 to 20 carbon atoms;
- or an aromatic group containing from 6 to 20 carbon atoms,
- R.sup.3 is a fluorine atom or CF.sub.3 group;
- m is an integer from 1 to 3
- n is an integer from 1 to 5,
- comprising mixing in the following order:
- component (B), the monomer to be polymerized, component (A), and, last of all, component (C), in an aliphatic, cycloaliphatic, aromatic solvent or their mixtures.
20 more elements
Method for the preparation of a catalytic system for the polymerization of dienic monomers, consisting essentially of:
- (A) a salt having the formula
- ML.sub.3
- wherein M represents Sc or Y or a metal with an atomic number between 57 and 71, and L is an anion with the sole exclusion of halogen,
- (B) an alkyl, hydride or alkyl-hydride compound having the formula
- MeR.sup.1.sub.z
- wherein,
- Me is a metal belonging to group I, II or III of the periodic table;
- R.sup.1 is:
- an aliphatic or cycloaliphatic radical containing from 1 to 20 carbon atoms,
- an aromatic radical containing from 6 to 20 carbon atoms, or
- a hydrogen atom,
- z is an integer from 1 to 3 equal to the valence of Me, on condition that, if z is equal to 3, only one of the three R.sup.1 groups bound to the metal can be hydrogen,
- (C) an organometallic derivative of boron having formula
- BR.sup.2.sub.3-m (C.sub.6 H.sub.5-n R.sup.3.sub.n).sub.m
- wherein,
- R.sup.2 is an aliphatic radical, linear or branched, containing from 1 to 20 carbon atoms;
- a cycloaliphatic group containing from 6 to 20 carbon atoms;
- or an aromatic group containing from 6 to 20 carbon atoms,
- R.sup.3 is a fluorine atom or CF.sub.3 group;
- m is an integer from 1 to 3
- n is an integer from 1 to 5,
- comprising mixing components (A), (B) and (C) in an aliphatic, cycloaliphatic, aromatic solvent or their mixtures.
19 more elements
Method for the preparation of a catalytic system, for the polymerization of dienic monomers, consisting essentially of:
- (A) a salt having the formula
- ML.sub.3
- wherein M represents Sc or Y or a metal with an atomic number between 57 and 71, and L is an anion with the sole exclusion of halogen,
- (B) an alkyl, hydride or alkyl-hydride compound having the formula
- MeR.sup.1.sub.z
- wherein,
- Me is a metal belonging to group I, II or III of the periodic table;
- R.sup.1 is:
- an aliphatic or cycloaliphatic radical containing from 1 to 20 carbon atoms,
- an aromatic radical containing from 6 to 20 carbon atoms, or
- a hydrogen atom,
- z is an integer from 1 to 3 equal to the valence of Me, on condition that, if z is equal to 3, only one of the three R.sup.1 groups bound to the metal can be hydrogen,
- (C) an organometallic derivative of boron having formula
- BR.sup.2.sub.3-m (C.sub.6 H.sub.5-n R.sup.3.sub.n) .sub.m
- wherein,
- R.sup.2 is an aliphatic radical, linear or branched, containing from 1 to 20 carbon atoms;
- a cycloaliphatic group containing from 6 to 20 carbon atoms;
- or an aromatic group containing from 6 to 20 carbon atoms,
- R.sup.3 is a fluorine atom or CF.sub.3 group;
- m is an integer from 1 to 3
- n is an integer from 1 to 5,
- comprising mixing components (A), (B) and (C) for a period of 0.5-24 hours at temperatures of between 0.degree. and 80.degree. C. in the presence of or without small quantities of diolefin.
19 more elements
Dependencies are inferred from the claim text.