公开(公告)号：US09650459B2

公开(公告)日：2017-05-16

申请号：US14848405

申请日：2015-09-09

Applicant: Chevron Phillips Chemical Company LP

Inventor： Jeff F Greco ,  Qing Yang ,  Vivek Rohatgi ,  Mark L. Hlavinka ,  Jim B Askew

IPC: C08F4/653 ,  C08F4/6592 ,  C08F210/02 ,  C08F210/14 ,  C08F4/659 ,  C08F210/16

CPC classification number: C08F210/14 ,  C08F4/65904 ,  C08F4/65916 ,  C08F210/02 ,  C08F210/16 ,  C08F4/65927 ,  C08F4/65925 ,  C08F210/10 ,  C08F2500/14 ,  C08F2500/05

Abstract: Methods for controlling the die swell of an olefin polymer produced using a dual catalyst system are disclosed. The die swell of the olefin polymer can be increased or decreased as a function of the catalyst weight ratio and the reactant molar ratio used during the olefin polymerization process.

公开(公告)号：US09493589B1

公开(公告)日：2016-11-15

申请号：US14848395

申请日：2015-09-09

Applicant: Chevron Phillips Chemical Company LP

Inventor： Jeff F Greco ,  Qing Yang ,  Vivek Rohatgi ,  Mark L. Hlavinka ,  Jim B Askew

IPC: C08F210/16 ,  C08F210/14 ,  C08F210/08

CPC classification number: C08F210/16 ,  B29C49/0005 ,  B29C49/04 ,  B29K2023/06 ,  B29K2995/0089 ,  C08F4/65912 ,  C08F4/65916 ,  C08F4/65925 ,  C08F4/65927 ,  C08F2500/05 ,  C08F2500/12 ,  C08F2500/13 ,  C08L23/0815 ,  C08L2203/10 ,  C08L2205/025 ,  C08L2207/062 ,  C08L2314/06 ,  C08F4/65904 ,  C08F210/14 ,  C08F2500/17

Abstract: Disclosed herein are ethylene-based polymers generally characterized by a density greater than 0.954 g/cm3, high load melt index ranging from 10 to 45 g/10 min, a ratio of high load melt index to melt index ranging from 175 to 600, a rheological slope parameter ranging from 0.15 to 0.30, and an ESCR in 10% igepal exceeding 800 hours. These polymers have the beneficial processability and die swell features of chromium-based resins, but with improved stiffness and stress crack resistance, and can be used in blow molding and other end-use applications.

Abstract translation: 本文公开的是基于乙烯的聚合物，其通常特征在于密度大于0.954g / cm 3，高负荷熔体指数为10至45g / 10min，高负载熔体指数与熔体指数的比值为175至600，a 流变斜率参数为0.15〜0.30，ESCR为10％以上，超过800小时。 这些聚合物具有铬基树脂的有益的可加工性和模具膨胀特性，但具有改善的刚度和抗应力开裂性，并且可用于吹塑和其它终端应用。