Resumen
[0001] 1. The invention concerns olefin polymerization catalyst component comprising an organometallic compound of general formula I <img class="EMIRef" id="462032704-ia01" /> wherein: M is a transition metal of groups 3, 4-10, lanthanide or actinide of the periodic table of the elements; each R is independently a structural bridge rigidly connecting two ligands L<1> , L<2> and L<3> and is constituted by 1 to 4 chain atoms selected from carbon, silicon, germanium, oxygen, boron; m, n and o are 0 or 1, with the proviso that m+n+o is 2 or 3; L < 1 > is a ligand of the cyclopentadienyl type or is isolobal to cyclopentadienyl, L < 2 > is a ligand of the cyclopentadienyl type or is isolobal to cyclopentadienyl, or a monovalent anionic ligand selected from the group consisting of N, P, B when m+n =2, it is selected from the group consisting of NR<1> , PR<1> , BR<1> , O and S when m+n =1; L < 3 > is a monovalent anionic ligand selected from the group consisting of N, P, B when n+o =2, it is selected from the group consisting of NR<1> , PR<1> , BR<1> , O and S when n+o =1; R < 1 > is hydrogen, C<1> -C<20> alkyl, C<3> -C<20> cycloalkyl, C<6> -C<20> aryl, C<3> -C<20> alkenyl, optionally comprising 1 to 5 heteroatoms such as Si, N, P, O, F, Cl, Br; each X is independently selected from the group consisting of hydrogen, halogen, NR<2>2 , R<2> with R<2> equal to C<1> -C<20> alkyl, C<1> -C<20> alkyl, C<3> -C<20> cycloalkyl, C<6> -C<20> aryl, C<3> -C<20> alkenyl, optionally comprising 1 to 5 heteroatoms such as Si, N, P, O, F, Cl, Br; q is a number whose value is: 0, 1, 2 or 3, depending on the valence of the metal M; D is a neutral Lewis base, p is a number whose value is: 0, 1, 2 or 3. [0002] The invention also concerns catalysts comprising compounds of formula (I) and the polymerization process making use of a catalyst comprising the claimed compounds.
Reivindicaciones
1. Olefin polymerization catalyst component comprising an organometallic compound of general formula I <img class="EMIRef" id="462032706-ib0032" /> wherein: M is a transition metal of groups 3, 4-10, lanthanide or actinide of the periodic table of the elements, preferably titanium, zirconium or hafnium; each R is independently a structural bridge rigidly connecting two ligands L<1> , L<2> and L<3> and is constituted by 1 to 4 chain atoms selected from carbon, silicon, germanium, oxygen, boron; m, n and o are 0 or 1, with the proviso that m+n+o is 2 or 3; L < 1 > is a ligand of the cyclopentadienyl type or is isolobal to cyclopentadienyl, preferably a cyclopentadienyl, indenyl or fluorenyl ring, cyclopenteno[b]tiophenyl cyclopenteno[b:b']-dithiophenyl cyclopenteno[b]pyrrolyl, boratabenzene, phospholyl, dihydroindeno[b]indolyl, optionally substituted by one or more R<1> groups; most preferably a cyclopentadienyl, indenyl or fluorenyl ring, optionally substituted by one or more R<1> groups; L <2> is a ligand of the cyclopentadienyl type or is isolobal to cyclopentadienyl, or a monovalent anionic ligand selected from the group consisting of N, P, B when m+n =2, it is selected from the group consisting of NR<1> , PR<1> , BR<1> , O and S when m+n =1; L < 3 > is a monovalent anionic ligand selected from the group consisting of N, P, B when n+o =2, it is selected from the group consisting of NR<1> , PR<1> , BR<1> , O and S when n+o =1; R < 1 > is hydrogen, C<1> -C<20> alkyl, C<3> -C<20> cycloalkyl, C<6> -C<20> aryl, C<3> -C<20> alkenyl, optionally comprising 1 to 5 heteroatoms such as Si, N, P, O, F, Cl, Br; each X is independently selected from the group consisting of hydrogen, halogen, NR<2>2 , R<2> with R<2> equal to C<1> -C<20> alkyl, C<3> -C<20> cycloalkyl, C<6> -C<20> aryl, C<3> -C<20> alkenyl, optionally comprising 1 to 5 heteroatoms such as Si, N, P, O, F, Cl, Br; q is a number whose value is: 0, 1, 2 or 3, depending on the valency of the metal M; D is a neutral Lewis base, p is a number whose value is: 0, 1, 2 or 3. 2. Catalyst component according to claim 1 wherein n is 0 and each R is independently selected from CR<1>2 , SiR<1>2 , CR<1>2 -CR<1>2 , CR<1>2 -SiR<1>2 , SiR<1>2 -SiR<1>2 ; wherein R<1> is independently selected from hydrogen, C<1> -C<20> alkyl, C<3> -C<20> cycloalkyl, C<6> -C<20> aryl, C<3> -C<20> alkenyl, optionally comprising 1 to 5 heteroatoms such as Si, N, P, O, F, Cl, Br. 3. Catalyst component according to claim 1 wherein D is selected from the group consisting of linear or cyclic ethers, amines and phosphines. 4. Catalyst component according to claim 1 wherein the organometallic compound has formula (II) <img class="EMIRef" id="462032706-ib0033" /> wherein Cp is a cyclopentadienyl or indenyl ring, optionally substituted by one or more R<1> groups, M is selected from Ti, Zr and Hf each R is independently selected from CR<1>2 , SiR<1>2 , CR<1>2 -CR<1>2 , CR<1>2 -SiR<1>2 , SiR<1>2 -SiR<1>2 , wherein R < 1 > is hydrogen, C<1> -C<20> alkyl, C<3> -C<20> cycloalkyl, C<6> -C<20> aryl, C<3> -C<20> alkenyl, optionally comprising 1 to 5 heteroatoms such as Si, N, P, O, F, Cl, Br. L < 2 > and L < 3 > are independently selected from the group consisting of NR<1> , PR<1> , BR<1> , O and S; X is independently selected from the group consisting of hydrogen, halogen, NR<2> , R<2> with R<2> equal to C<1> -C<20> alkyl, C<3> -C<20> cycloalkyl, C<6> -C<20> aryl, C<3> -C<20> alkenyl, optionally comprising 1 to 5 heteroatoms such as Si, N, P, O, F, Cl, Br. D is a neutral Lewis base; p is a number whose value is: 0, 1, 2 or 3. 5. Catalyst component according to claim 1 wherein o is equal to 0. 6. Catalyst component according to claim 1 wherein at least one L group selected from L<1> , L<2> and L<3> and/or one R group contains a -O-SiR<2>3 group. 7. Catalyst component comprising a compound according to claims1-6 and a porous support. 8. Olefin polymerization catalyst comprising a catalyst component according to claims 1-7 and a cocatalyst selected from aluminoxanes and boron Lewis acids. 9. Process for the preparation of catalyst components according to claims 1-6 including reacting a compound of formula MX<q+3> wherein M is a transition metal of groups 3, 4-10, lanthanide or actinide of the periodic table of the elements, X is a monovalent anionic ligand and q is 0, 1, 2, or 3 depending on the valence of the metal M, with a compound of formula III <img class="EMIRef" id="462032706-ib0034" /> wherein each R is independently a structural bridge rigidly connecting L<1> , L<2> and L<3> and is constituted by 1 to 4 chain atoms selected from carbon, silicon, germanium, oxygen, boron; these atoms can be part of fused rings, aromatics rings or spiro rings; m, n and o are 0 or 1, with the proviso that m+n+o is 2 or 3. L < 1 > is a group of the cyclopentadienyl type or is isolobal to cyclopentadienyl, optionally substituted by one or more R<1> groups; L < 2 > is a group of the cyclopentadienyl type or is isolobal to cyclopentadienyl, or it is selected from the group consisting of N, P, B when m+n =2, it is selected from the group consisting of NR<1> , PR<1> , BR<1> , O and S when m+n =1; L < 3 > is selected from the group consisting of N, P, B when n+o =2, it is selected from the group consisting of NR<1> , PR<1> , BR<1> , O and S when n+o =1; R < 1 > is hydrogen, C<1> -C<20> alkyl, C<3> -C<20> cycloalkyl, C<6> -C<20> aryl, C<3> -C<20> alkenyl, optionally comprising 1 to 5 heteroatoms such as Si, N, P, O, F, Cl, Br. 10. Compounds formula III <img class="EMIRef" id="462032706-ib0035" /> wherein each R is independently a structural bridge rigidly connecting L<1> , L<2> and L<3> and is constituted by 1 to 4 chain atoms selected from carbon, silicon, germanium, oxygen, boron; these atoms can be part of fused rings, aromatics rings or spiro rings; m, n and o are 0 or 1, with the proviso that m+n+o is 2 or 3. L < 1 > is a group of the cyclopentadienyl type or is isolobal to cyclopentadienyl, optionally substituted by one or more R<1> groups; L < 2 > is a group of the cyclopentadienyl type or is isolobal to cyclopentadienyl, or it is selected from the group consisting of N, P, B when m+n =2, it is selected from the group consisting of NR<1> , PR<1> , BR<1> , O and S when m+n =1; L < 3 > is selected from the group consisting of N, P, B when n+o =2, it is selected from the group consisting of NR<1> , PR<1> , BR<1> , O and S when n+o =1; R < 1 > is hydrogen, C<1> -C<20> alkyl, C<3> -C<20> cycloalkyl, C<6> -C<20> aryl, C<3> -C<20> alkenyl, optionally comprising I to 5 heteroatoms such as Si, N, P, O, F, Cl, Br. 11. Process for the polymerization of olefins characterized by the use of a catalyst according to claim 8. 12. Polyolefins obtainable by the process of claim 11
