Patent ID: 6730754
Filing Date: 2004-05-04
Classification: C07F,C08F,Y10S

Abstract:
A process for producing substantially amorphous propylene homopolymers or copolymers comprising contacting propylene, optionally in the presence of one or more olefins selected from the group consisting of ethylene, alpha-olefins of formula CH2&boxH;CHRâ€² wherein Râ€² is a linear or branched, C2-C10 alkyl or non conjugate diolefins containing up to 20 carbon atoms, under polymerization conditions with a catalyst system comprising:A) a titanium complex of formula (I): â€ƒwherein: Ti is titanium; X is a nitrogen (N) or phosphorus (P) atom; Z is a C, Si or Ge atom; the groups R1, equal to or different from each other, are selected from the group consisting of hydrogen, linear or branched, saturated or unsaturated C1-C20 alkyl, C3-C20 cycloalkyl, C6-C20 aryl, C7-C20 alkylaryl and C7-C20 arylalkyl optionally containing Si or heteroatoms belonging to groups 13 or 15-17 of the Periodic Table of the Elements, or two R1 groups together form a C4-C7 ring; Y1 is an atom selected from the group consisting of NR7, oxygen (O), PR7 or sulfur (S), wherein the group R7 is selected from the group consisting of linear or branched, saturated or unsaturated, C1-C20 alkyl, C6-C20 aryl and C7-C20 arylalkyl radicals; the groups R2 and R3, equal to or different from each other, are selected from the group consisting of hydrogen, halogen, â€”R, â€”OR, â€”OCOR, â€”OSO2CF3, â€”SR, â€”NR2 and â€”PR2, wherein R is a linear or branched, saturated or unsaturated C1-C20 alkyl, C3-C20 cycloalkyl, C6-C20 aryl, C7-C20 alkylaryl or C7-C20 arylalkyl radical; two R groups can also form a saturated or unsaturated C4-C7 ring, or R2 and R3 form a condensed aromatic or aliphatic C4-C7 ring that can be substituted with one or more R9 groups, wherein R9 is selected from the group consisting of halogen, â€”R, â€”OR, â€”OCOR, â€”OSO2CF3, â€”SR, â€”NR2 and â€”PR2, wherein R has the meaning reported above, or two vicinal R9 groups together form a condensed aromatic or aliphatic C4-C7 ring; the groups R8, R4 and R5, equal to or different from each other, are selected from the group consisting of hydrogen, halogen, â€”R, â€”OR, â€”OCOR, â€”OSO2CF3, â€”SR, â€”NR2 and â€”PR2, wherein R has the meaning reported above, or R8 and R4, R4 and R5, or R5 and R8 together form a condensed C4-C7 ring that can be substituted with one or more R groups; the group R6 is selected from the group consisting of a linear or branched, saturated or unsaturated C1-C20 alkyl, C6-C20 aryl and C7-C20 arylalkyl radical, optionally containing heteroatoms belonging to groups 13 or 15-17 of the Periodic Table of the Elements; the substituents L, equal to or different from each other, are monoanionic sigma ligands selected from the group consisting of hydrogen, halogen, â€”R, â€”OR, â€”OCOR, â€”OSO2CF3, â€”SR, â€”NR2 and â€”PR2, wherein R has the meaning reported above; Y2 is selected from the group consisting of CR8 or Y1; and m is 0 or 1; when the group Y2 is a CR8 group m is 1 and the 6 membered ring formed is an aromatic benzene ring; when Y2 is different from CR8 m is 0 and the carbon atom bonding the R4 group is directly bonded to the cyclopentadienyl ring and the ring formed is a 5 membered ring; and (B) an activating cocatalyst.