Process for production of olefin polymer
AssigneeTosoh Corporation
InventorsMakoto Sone, Saiki Hasegawa, Satoru Yamada, Akihiro Yano
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Abstract
A process for production of an olefin polymer is provided which comprises polymerization of ethylene and/or α-olefin of three of more carbons at a polymerization temperature of not lower than 120° C. with a catalyst comprising a specific metallocene compound having a substituted fluorenyl group, and a compound which reacts with the metallocene compound to form a cationic metallocene compound. The olefin polymer or copolymer produced by the process has narrow composition distribution, narrow molecular weight distribution, and a high molecular weight.
Claims15
A process for producing an olefin polymer, which comprises polymerizing ethylene or ethylene and an α-olefin of three or more carbons at a polymerization temperature or not lower than 120° C. with a catalyst, said catalyst comprising:
- (a) a metallocene compound having an unsubstituted or substituted fluorenyl group having the formula (I):
- wherein R1 is a diarylsilanediyl group, which forms a bridge between the C5H4 group and the C4H4-mR2mC5C4H4-nR3n group to increase steric rigidity of the compound of the formula (I);
- C5H4 is a cyclopentadienyl group;
- C4H4-mR2mC5C4H4-nR3n is a substituted fluorenyl group;
- R2 and R3 are independently a substituent on the benzo ring moiety of the substituted fluorenyl group and is an alkyl group, a halogenated alkyl group, an aryl group or a halogenated aryl group;
- M1 is Ti or Zr;
- each of R4 is independently a hydrogen atom, a hydrocarbon group, an amino group of 1 to 20 carbons, an oxygen containing hydrocarbon group of 1 to 20 carbons, or halogen;
- m is an integer of from 0-4;
- and n is an integer of from 0-4;
- and
- (b) a compound which reacts with the metallocene compound to form a cationic metallocene compound;
- and
- (c) an organometallic compound.
Dependencies are inferred from the claim text.