摘要:
The invention describes ligands of formula (I), wherein LIG represents an &eegr;5-ligand substituted by a group R1 and a group (R″)m; X represents a 1 to 3 atom bridge; Y represents a nitrogen or phosphorus atom; Z represents a carbon, nitrogen or phosphorus atom.
摘要:
The invention relates to an organometallic compound comprising a central transition metal atom and a ligand coordinated thereto having a heteroatomic ring structure, characterized in that the ligand includes at least three nitrogen atoms, three of them being bonded to the same carbon atom.
摘要:
A multimodal copolymer of ethylene comprising at least (i) a lower molecular weight fraction of a copolymer of ethylene and at least one alpha-olefin comonomer and (ii) a higher molecular weight fraction of a copolymer of ethylene and at least one alpha-olefin comonomer, wherein said copolymer has a density below 920 kg/m3.
摘要翻译:一种乙烯的多峰共聚物,其至少包含(i)乙烯与至少一种α-烯烃共聚单体的共聚物的较低分子量馏分和(ii)乙烯与至少一种α-烯烃的共聚物的较高分子量馏分 共聚单体,其中所述共聚物的密度低于920kg / m 3。
摘要:
A process for the preparation of an olefin homopolymer or copolymer comprising polymerising at least one C2-20-α-olefin in slurry phase in the presence of 1) a metallocene compound of formula I: (Cp) (Cp″) RnMX2 (I) wherein: Cp is an optionally substituted and/or optionally fused homo- or heterocyclopentadienyl ligand; Cp″ is a cyclopentadienyl substituted by at least one C1-20-alkyl group; R is a bridge of 1-7 bridging atoms; M is a group 4 to 6 transition metal; each X is —CH2—Y, wherein Y is C6-20-aryl, C6-20 heteroaryl, C1-20-alkoxy, C6-20-aryloxy, —NR′2, —SR′, —PR′3, —SiR′3, —OSiR′3 or halogen; R′is C1-20-hydrocarbyl or in case of —NR′2, the two substituents R′ can form a ring together with the nitrogen atom wherein they are attached to; and each non-cyclopentadienyl ring moiety can further be substituted; n is 0 or 1; and (11) an aluminoxane.
摘要:
A polyethylene moulding composition having a multimodal molecular weight distribution, having a density according to ISO 1183 at 23° C. in the range of 920 to 960 kg/m3 and an MFR190/2 according to ISO 1133 in the range of 0.05 to 10 g/10 min, said polyethylene moulding composition comprising at least three ethylene polymer fractions having distinct molecular weights: A) 15 to 50 wt % of a low molecular weight ethylene homopolymer or copolymer fraction with a weight average molecular weight Mw in the range of 15 to 40 kg/mol; B) 15 to 50 wt % of a medium molecular weight ethylene homopolymer or copolymer fraction with a weight average molecular weight Mw in the range of 70 to 200 kg/mol; and C) 15 to 50 wt % of a high molecular weight ethylene homopolymer or copolymer fraction with a weight average molecular weight Mw in the range of 220 to 400 kg/mol, provided that one of A, B and C is an ethylene homopolymer and at least one other component is an ethylene copolymer with at least one C3-C10 comonomer; and wherein the composition has—a Shore D hardness measured according to ASTM D2240-05 (15 sec) of at least 56.0.
摘要:
A complex comprising a ligand of formula (I), wherein each R1, which may be the same or different, is hydrogen, an optionally substituted C1-20 hydrocarbyl group, N(R5)2, silyl, siloxy; an optionally substituted heteroaryl group, an optionally substituted heterocyclyl group or two R1 groups on adjacent carbon atoms taken together may form an optionally substituted 5- to 8-membered fused ring; each R2, which may be the same or different is hydrogen, is hydrogen, an optionally substituted C1-20 hydrocarbyl group, N(R5)2, silyl, siloxy; an optionally substituted heteroaryl group, or an optionally substituted heterocyclyl group; R3, which binds to the 6-membered ring of the indenyl group, is —(Si(R5)2)p—, where p is 1 or 2, —(C(R5)2)n- where n is an integer of 2 or more; each R4 which may be the same or different, is hydrogen, an optionally substituted C1-20 hydrocarbyl group, N(R5)2, silyl, siloxy, an optionally substituted heteroaryl group, an optionally substituted heterocyclyl group or two R4 groups on adjacent carbon atoms taken together can form an optionally substituted 5- to 8-membered fused carbon ring; each R5, which may be the same or different, is hydrogen, an optionally substituted C1-20 hydrocarbyl group, or two R5 groups taken together can form an optionally substituted 5- to 8-membered ring; a is 0 to 3; b is 0 to 3; c is 0 to 4; complexed to a metal ion, M.
摘要:
A process for the polymerisation of ethylene and optionally at least one C3-20 alpha olefin comonomer in the slurry or solution phase in a reactor having a polymer outlet stream, a procatalyst or catalyst feed stream and a hydrogen feed stream, said polymerisation being effected in the presence of a metallocene catalyst, a diluent and hydrogen, wherein said diluent is recycled from said outlet stream to said hydrogen feed stream, said procatalyst or catalyst feed stream is free of hydrogen, said hydrogen feed stream is free of procatalyst or catalyst and said procatalyst or catalyst feed stream does not comprise recycled diluent.
摘要:
A process for the polymerisation of ethylene and optionally at least one C3-20 alpha olefin comonomer in the slurry or solution phase in a reactor having a polymer outlet stream, a procatalyst or catalyst feed stream and a hydrogen feed stream, said polymerisation being effected in the presence of a metallocene catalyst, a diluent and hydrogen, wherein said diluent is recycled from said outlet stream to said hydrogen feed stream, said procatalyst or catalyst feed stream is free of hydrogen, said hydrogen feed stream is free of procatalyst or catalyst and said procatalyst or catalyst feed stream does not comprise recycled diluent.