摘要:
This invention relates in one aspect to propylene polymers comprising propylene, said polymers having a melt flow rate (MFR, ASTM 1238, 230° C., 2.16 kg) of 10 dg/min to 25 dg/min; a Dimensionless Stress Ratio/Loss Tangent Index R2 at 190° C. from 1.5 to 28; an average meso run length determined by 13C NMR of at least 70 or higher; and an MFR MFR Ratio of at least 1.0 and optionally, a Loss Tangent, tan δ, at an angular frequency of 0.1 rad/s at 190° C. from 14 to 100. The inventive propylene polymer compositions are useful in in molded articles and non-woven fibers and fabrics.
摘要:
This invention relates to a novel group 2, 3 or 4 transition metal metallocene catalyst compound having at least one arenyl ligand substituted with: 1) a cyclopropyl group and, optionally, 2) at least one other group, such as a hydrocarbyl, a heteroatom or a heteroatom containing group.
摘要:
Disclosed are new classes of pyridyldiamide catalyst components useful in olefin polymerization, an example of which includes: wherein M is a hafnium or zirconium; R1 and R11 are selected from phenyl and substituted phenyl, wherein the substitutions are selected from C1 to C5 hydrocarbyls, preferably C2 to C4 hydrocarbyls, and can reside in any of the ortho, meta, para positions on the phenyl ring; R2′ and R2″ are selected independently from hydrogen and C1 to C6 hydrocarbyls, preferably hydrogen; R10 is a hydrocarbyl bridging group; R3, R4, and R5 are independently selected from hydrogen, hydrocarbyls, and substituted hydrocarbyls; and R6, R7, R8, and R9 are independently selected from hydrogen, hydrocarbyls, and substituted hydrocarbyls; wherein R6 and R7 form an aromatic ring or R7 is hydrogen and R6 is selected from methyl, ethyl, propyl, isopropyl, butyl, sec-butyl, and tert-butyl, preferably methyl.
摘要翻译:公开了可用于烯烃聚合的新类型的吡啶基二酰胺催化剂组分,其实例包括:其中M是铪或锆; R 1和R 11选自苯基和取代的苯基,其中取代选自C 1至C 5烃基,优选C 2至C 4烃基,并且可以位于苯环上的任何邻位,间位,对位; R2'和R2“独立地选自氢和C1至C6烃基,优选氢; R10是烃基桥联基团; R 3,R 4和R 5独立地选自氢,烃基和取代的烃基; 且R 6,R 7,R 8和R 9独立地选自氢,烃基和取代的烃基; 其中R6和R7形成芳环或R7是氢,R6选自甲基,乙基,丙基,异丙基,丁基,仲丁基和叔丁基,最好是甲基。
摘要:
The present invention provides an improved process for producing an alkylated aromatic compound from an at least partially untreated alkylatable aromatic compound having catalyst poisons and an alkylating agent, wherein said alkylatable aromatic compound stream is treated to reduce catalyst poisons with a treatment composition having a surface area/surface volume ratio of greater than or equal to 30 in−1 (12 cm−1) in a treatment zone separate from an alkylation reaction zone under treatment conditions including a temperature of from about 30° C. to about 300° C. to form an effluent comprising said treated alkylatable aromatic compound.