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    Long Chain Branched Polymers and Methods of Making Same
    12.
    发明申请
    Long Chain Branched Polymers and Methods of Making Same 有权
    长链支化聚合物及其制备方法

    公开(公告)号：US20150203614A1

    公开(公告)日：2015-07-23

    申请号：US14676581

    申请日：2015-04-01

    Applicant: Chevron Phillips Chemical Company LP

    Inventor： Youlu Yu ,  Eric D. Schwerdtfeger ,  Max P. McDaniel ,  Alan L. Solenberger ,  Kathy S. Collins

    IPC: C08F110/02

    CPC classification number: C08F110/02 ,  B01J23/26 ,  B01J35/1009 ,  B01J35/1014 ,  B01J35/1019 ,  C08F10/02 ,  C08F210/02 ,  C08F2500/04 ,  C08F2500/09 ,  C08F4/69 ,  C08F4/025

    Abstract: A polymer having a long chain branching content peaking at greater than about 20 long chain branches per million carbon atoms, and a polydispersity index of greater than about 10 wherein the long chain branching decreases to approximately zero at the higher molecular weight portion of the molecular weight distribution. A polymer having a long chain branching content peaking at greater than about 8 long chain branches per million carbon atoms, a polydispersity index of greater than about 20 wherein the long chain branching decreases to approximately zero at the higher molecular weight portion of the molecular weight distribution. A polymer having a long chain branching content peaking at greater than about 1 long chain branches per chain, and a polydispersity index of greater than about 10 wherein the long chain branching decreases to approximately zero at the higher molecular weight portion of the molecular weight distribution.

    Abstract translation: 具有长链支化含量高于每百万个碳原子大于约20个长支链的聚合物，多分散指数大于约10，其中长链支化在分子量的较高分子量部分下降至约零 分配。 具有长链支化含量高于每百万个碳原子大于约8个长链分支的聚合物，多分散指数大于约20，其中长链支化在分子量分布的较高分子量部分下降至约零 。 具有长链支化含量在每链大于约1个长链分支峰值的聚合物，以及大于约10的多分散指数，其中在分子量分布的较高分子量部分，长链支链降至约为零。

    DUAL CATALYST SYSTEM FOR PRODUCING POLYETHYLENE WITH LONG CHAIN BRANCHING FOR BLOW MOLDING APPLICATIONS
    16.
    发明申请
    DUAL CATALYST SYSTEM FOR PRODUCING POLYETHYLENE WITH LONG CHAIN BRANCHING FOR BLOW MOLDING APPLICATIONS 有权

    公开(公告)号：US20220127395A1

    公开(公告)日：2022-04-28

    申请号：US17571665

    申请日：2022-01-10

    Applicant: Chevron Phillips Chemical Company LP

    Inventor： Jeremy M. Praetorius ,  Alfred E. Brown, Jr. ,  Yongwoo Inn ,  Youlu Yu ,  Qing Yang ,  Ashish M. Sukhadia

    IPC: C08F210/16 ,  B29C49/00 ,  C08F4/6592

    Abstract: Ethylene-based polymers are characterized by a melt index less than 1 g/10 min, a density from 0.94 to 0.965 g/cm3, a Mw from 100,000 to 250,000 g/mol, a relaxation time from 0.5 to 3 sec, and an average number of long chain branches (LCBs) per 1,000,000 total carbon atoms in a molecular weight range of 300,000 to 900,000 g/mol that is greater than that in a molecular weight range of 1,000,000 to 2,000,000 g/mol, or an average number of LCBs per 1,000,000 total carbon atoms in a molecular weight range of 1,000,000 to 2,000,000 g/mol of less than or equal to about 5 and a maximum ratio of ηE/3η at an extensional rate of 0.1 sec−1 from 1.2 to 10. These polymers have substantially no long chain branching in the high molecular weight fraction of the polymer, but instead have significant long chain branching in a lower molecular weight fraction, such that polymer melt strength and parison stability are maintained for the fabrication of blow molded products and other articles of manufacture. These ethylene polymers can be produced using a dual catalyst system containing a single or two atom bridged metallocene compound with two indenyl groups, and a single atom bridged metallocene compound with a fluorenyl group and a cyclopentadienyl group.

    DUAL CATALYST SYSTEM FOR PRODUCING POLYETHYLENE WITH LONG CHAIN BRANCHING FOR BLOW MOLDING APPLICATIONS
    17.
    发明申请
    DUAL CATALYST SYSTEM FOR PRODUCING POLYETHYLENE WITH LONG CHAIN BRANCHING FOR BLOW MOLDING APPLICATIONS 有权

    公开(公告)号：US20210388130A1

    公开(公告)日：2021-12-16

    申请号：US16898502

    申请日：2020-06-11

    Applicant: Chevron Phillips Chemical Company LP

    Inventor： Jeremy M. Praetorius ,  Alfred E. Brown, JR. ,  Yongwoo Inn ,  Youlu Yu ,  Qing Yang ,  Ashish M. Sukhadia

    IPC: C08F210/16 ,  B29C49/00 ,  C08F4/6592

    Abstract: Ethylene-based polymers are characterized by a melt index less than 1 g/10 min, a density from 0.94 to 0.965 g/cm3, a Mw from 100,000 to 250,000 g/mol, a relaxation time from 0.5 to 3 sec, and an average number of long chain branches (LCBs) per 1,000,000 total carbon atoms in a molecular weight range of 300,000 to 900,000 g/mol that is greater than that in a molecular weight range of 1,000,000 to 2,000,000 g/mol, or an average number of LCBs per 1,000,000 total carbon atoms in a molecular weight range of 1,000,000 to 2,000,000 g/mol of less than or equal to about 5 and a maximum ratio of ηE/3η at an extensional rate of 0.1 sec−1 from 1.2 to 10. These polymers have substantially no long chain branching in the high molecular weight fraction of the polymer, but instead have significant long chain branching in a lower molecular weight fraction, such that polymer melt strength and parison stability are maintained for the fabrication of blow molded products and other articles of manufacture. These ethylene polymers can be produced using a dual catalyst system containing a single or two atom bridged metallocene compound with two indenyl groups, and a single atom bridged metallocene compound with a fluorenyl group and a cyclopentadienyl group.

    Advanced quality control tools for manufacturing bimodal and multimodal polyethylene resins
    18.
    发明授权
    Advanced quality control tools for manufacturing bimodal and multimodal polyethylene resins 有权

    公开(公告)号：US11098139B2

    公开(公告)日：2021-08-24

    申请号：US15908033

    申请日：2018-02-28

    Applicant: Chevron Phillips Chemical Company LP

    Inventor： Youlu Yu ,  Paul J. DesLauriers ,  Yongwoo Inn

    IPC: C08F10/02 ,  B01J19/00 ,  B01J19/24

    Abstract: A method of determining multimodal polyethylene quality comprising the steps of (a) providing a multimodal polyethylene resin sample; (b) determining, in any sequence, the following: that the multimodal polyethylene resin sample has a melt index within 30% of a target melt index; that the multimodal polyethylene resin sample has a density within 2.5% of a target density; that the multimodal polyethylene resin sample has a dynamic viscosity deviation (% MVD) from a target dynamic viscosity of less than about 100%; that the multimodal polyethylene resin sample has a weight average molecular weight (Mw) deviation (% MwD) from a target Mw of less than about 20%; and that the multimodal polyethylene resin sample has a gel permeation chromatography (GPC) curve profile deviation (% GPCD) from a target GPC curve profile of less than about 15%; and (c) responsive to step (b), designating the multimodal polyethylene resin sample as a high quality resin.

    Radically coupled resins and methods of making and using same
    20.
    发明授权
    Radically coupled resins and methods of making and using same 有权

    公开(公告)号：US10577440B2

    公开(公告)日：2020-03-03

    申请号：US14933847

    申请日：2015-11-05

    Applicant: Chevron Phillips Chemical Company LP

    Inventor： Carlos A. Cruz ,  Max P. McDaniel ,  Qing Yang ,  Jared L. Barr ,  Youlu Yu

    IPC: C08F10/02

    Abstract: A radically coupled polymer having a density of from about 0.915 g/ml to about 0.975 g/ml characterized by a crossover modulus measured in Pascals (Pa) that is equal to or less than ymn where ymn=180,000e−0.15x and x is the number average molecular weight of the radically coupled polymer divided by 1,000. An ethylene polymer having a level of short chain branching ranging from about 0 to about 10 mol. %; a level of long chain branching ranging from about 0.001 LCB/103 carbons to about 1.5 LCB/103 carbons as determined by SEC-MALS; and characterized by a crossover modulus measured in Pa that is equal to or less than ymn where ymn=180,000−0.15x and x is the number average molecular weight of the radically coupled polymer divided by 1,000.

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