摘要:
Catalyst compounds and catalyst systems including an asymmetric Salan ligands having a fluorenyl moiety are disclosed. Methods of preparing such catalyst compounds and catalyst systems, polymerization processes using such catalysts systems and olefin polymers prepared according to such processes using the catalysts systems are described.
摘要:
A phenylene bridged Salalen catalyst, a catalyst system comprising an activator and the phenylene bridged Salalen catalyst, a process comprising contacting one or more olefins with the catalyst system, and polymers produced by the process are disclosed herein.
摘要:
A cyclopentadienyl-substituted Salan catalyst, a catalyst system comprising an activator and the cyclopentadienyl-substituted Salan catalyst, a process comprising contacting one or more olefins with the catalyst system, and polymers produced by the process are disclosed herein. The instant disclosure is directed to catalyst compounds and catalyst systems comprising such compounds, processes for the preparation of the catalyst compounds and systems, and processes for the polymerization of olefins using such catalyst compounds and systems.
摘要:
Catalysts comprising salenol ligands are disclosed herein. Also, catalyst systems comprising the catalyst and an activator; methods to prepare the ligands, catalysts and catalyst systems; processes to polymerize olefins using the catalysts and/or catalyst systems; and the olefin polymers prepared according to the processes.
摘要:
The present disclosure relates to a transition metal based pro-catalyst represented by Formula I: wherein, the substituents have the meaning as defined in the specification. The present disclosure also relates to a process for preparing the transition metal based pro-catalyst represented by Formula I and the catalyst composition obtained therefrom. Further, the present disclosure relates to a process for polymerizing olefins by employing the catalyst composition comprising the transition metal based pro-catalyst represented by Formula I.
摘要:
Polyalphaolefins and Salan cataylsts, catalyst systems, and processes to produce the polyalphaolefins. Also disclosed are high-viscosity index polyalphaolefins and processes for producing them.
摘要:
An ethylene copolymer excellent in mechanical properties and moldability, which comprises 40 to 99 mol% ethylene units and 1 to 60 mol% C3-20 alpha -olefin units and in which the ratio (Mz/Mw) of the Z-average molecular weight (Mz) to the weight-average molecular weight (Mw) both determined by GPC is 10 to 30, that ratio (Mz/Mw) and the ratio (Mw/Mn) of the weight-average molecular weight (Mw) to the number-average molecular weight (Mn) both determined by GPC satisfy the relationship (Mz/Mw)>(Mw/Mn), the intrinsic viscosity is 0.5 to 4 dl/g, the ratio of the melt viscosity ( eta 0.01) as measured at 190 DEG C and a shear rate of 0.01 rad/sec to that ( eta 8) as measured at 190 DEG C and a shear rate of 8 rad/sec satisfy the relationship ( eta 0.01/ eta 8) 0.843x( eta )+1.0, and the absolute value of the activation energy (Ea) with respect to melt viscoelasticity shift factor is 4x10 J/mol.K or lower.
摘要:
Bis phenolate transition metal complexes are disclosed for use in alkene polymerization, with optional chain transfer agent, to produce polyolefins.
摘要:
Methods of preparing organosilica materials, which are a polymer comprising of at least one independent cyclic polyurea monomer of Formula (I) wherein each R 1 is a Z 1 OZ 2 SiZ 4 group, wherein each Z 1 represents a hydrogen atom, a C 1 -C 4 alkyl group, or a bond to a silicon atom of another monomer unit; Z 2 and Z 3 each independently represent a hydroxyl group, a C 1 -C 4 alkyl group, a C 1 -C 4 alkoxy group or an oxygen atom bonded to a silicon atom of another monomer unit; and each Z 4 represents a C 1 -C 8 alkylene group bonded to a nitrogen atom of the cyclic polyurea are provided herein. Methods of preparing and processes of using the organosilica materials, e.g., for gas separation, color removal, etc., are also provided herein.
摘要翻译:制备有机硅材料的方法,其为包含至少一种式(I)的独立的环状聚脲单体的聚合物,其中每个R 1为Z 1 OZ 2 SiZ 4基团,其中每个Z 1表示氢原子,C 1 -C 4烷基或键 到另一个单体单元的硅原子; Z2和Z3各自独立地表示与另一单体单元的硅原子键合的羟基,C1-C4烷基,C1-C4烷氧基或氧原子; 并且各Z4表示与环状聚脲的氮原子键合的C1-C8亚烷基。 本文还提供了使用有机硅材料的方法,例如用于气体分离,除色等。
摘要:
Use of homogeneous catalytic systems which include as a pre-catalyst a complex of a Group IV metal and a salalen ligand in the polymerization of alpha-olefins, is disclosed. The alpha-olefin polymers obtained are characterized by controlled levels of tacticity. Also disclosed are novel salalen ligands and novel complexes thereof with Group IV metals.