Process for preparing isobutylene-based polymers
View Patent ↗This invention relates to a metal organic compound, a catalytic composition comprising said metal organic compound, a process for homo- or co-polymerizing isoolefines in the presence of said metal organic compound and a method of stabilizing a compound of the general structure (II) [R′HC(CRR″) 2 ] 2+ [M 2 X 9 ] − , in which R is a group of the formula SiR 1 R 2 R 3 , R″ is hydrogen, C 1 to C 12 alkyl, a C 6 to C 14 aryl or a C 7 to C 20 alkylaryl, M is Zr or Hf, X is a halogen atom, and R 1 to R 3 is a C 1 to C 12 alkyl group, with a compound R′ of the formula M′R 4 R 5 R 6 , in which M′ is Si, Ge, Sn or Pb and R 4 to R 6 is a C 1 to C 12 alkyl group as well as a non-coordinating anion of the general structure [M 2 X 9 ] − in which M is Zr or Hf and X is a halogen atom.
1. A compound of the general structure (I)
[HC(CRR′R″)(CRR′R″)] +[M 2 X g] − (I),
wherein
R is independently hydrogen or a group of the formula M′R 1 R 2 R 3 ,
R′ is a group of the formula M′R 4 R 5 R 6 ,
R″ is hydrogen, a C 1 to C 12 alkyl, a C 6 to C 14 aryl or a C 7 to C 20 alkylaryl,
M is Zr or Hf,
M′ is Si, Ge, Sn or Pb,
X is a halogen atom, and R 1 to R 6 is a C 1 to C 12 alkyl group, a C 6 to C 14 aryl or a C 7 to C 20 alkylaryl.
2. A compound according to claim 1 wherein M′ is Si or Sn.
3. A compound according to claim 1 with the general structure (Ia)
[HC(CHRR′) 2 ] + [M 2 X 9 ] 31 (Ia),
wherein
R is a group of the formula SiR 1 R 2 R 3 ,
R′ is a group of the formula M′R 4 R 5 R 6 ,
R″ is hydrogen, a C 1 to C 12 alkyl, a C 6 to C 14 aryl or a C 7 to C 20 alkylaryl,
M is Zr or Hf,
M′ is Si, Ge, Sn or Pb,
X is a halogen atom, and
R 1 to R 6 is a C 1 to C 12 alkyl group, a C 6 to C 14 aryl or a C 7 to C 20 alkylaryl.
4. A compound according to claim 1 with the general structure (Ib)
[HC(CHRR′) 2 ] + [M 2 Cl 9 ] 31 (Ib),
wherein
R 1 to R 6 denote for methyl.
5. A catalyst of the general structure (I) according to claim 1 .
6. A catalytic composition comprising a compound of the general structure (I) according to claim 1 .
7. A process for homo- or co-polymerizing isoolefines, comprising polymerizing at least one isoolefin, optionally in the presence of further copolymerizable monomers, in the presence of a compound of the general structure (I) according to claim 1 .
8. A process according to claIm 7 , wherein the isoolefin is isobutene.
9. A process according to claim 7 , comprising polymerizing isobutene and isoprene.
10. A process according to claim 8 , further comprising the presence of one or more co-polymerizable monomers.
11. A process according to claim 9 , further comprising the presence of one or more co-polymerizable monomers.
12. A method of homo- or copolymerizing an olefin comprising polymerizing an olefin in the presence of a compound comprising an anion of the general structure [M 2 X 9 ] 31 in which M is Zr or Hf and X is a halogen atom.
13. A compound comprising a cation of the general structure (III)
[HC(CRR′R″)(CRR′R″)] + (III),
wherein R is independently hydrogen or a group of the formula M′R 1 R 2 R 3 ,
R′ is a group of the formula M′R 4 R 5 R 6 ,
R″ is hydrogen, a C 1 to C 12 alkyl, a C 6 to C 14 aryl or a C 7 to C 20 alkylaryl,
M′ is Si, Ge, Sn or Pb, and
R 1 to R 6 is a C 1 to C 12 alkyl group, a C 6 to C 14 aryl or a C 7 to C 20 alkylaryl.
14. A method of stabilizing a compound of the general structure (II)
[HC(CRR′R″)(CRR′R″)] + [M 2 X 9 ] 31 (II),
in which
R is a group of the formula M′R 1 R 2 R 3 ,
R″ is hydrogen, a C 1 to C 12 alkyl, a C 6 to C 14 aryl or a C 7 to C 20 alkylaryl,
M is Zr or Hf,
M′ is Si, Ge, Sn or Pb
X is a halogen atom, and
R′ to R 3 is a C 1 to C 12 alkyl group,
comprising stabilizing a compound of the general structure (II) with a compound R′ of the formula M′R 4 R 5 R 6 , in which M′ is Si, Ge, Sn or Pb and R 4 to R 6 is a C 1 to C 12 alkyl group.