公开(公告)号：US20240376237A1

公开(公告)日：2024-11-14

申请号：US18780870

申请日：2024-07-23

Applicant: Dow Global Technologies LLC

Inventor： Robert D.J. Froese ,  Daniel J. Arriola ,  Bryan D. Stubbert

IPC: C08F210/18

Abstract: The present process embodiments for synthesizing long-chain branched copolymers include contacting together one or more C2-C14 alkene monomers, at least one diene or polyene, optionally a solvent, and a multi-chain catalyst. The multi-chain catalyst includes a plurality of polymerization sites and produces at least two polymer chains of the C2-C14 alkene monomers, each polymer chain polymerizing at one of the polymerization sites. The process synthesizes the long-chain branched polymers by connecting the two polymer chains with the diene or polyene, the joining of the two polymer chains being performed in a concerted manner during the polymerization.

公开(公告)号：US12077619B2

公开(公告)日：2024-09-03

申请号：US17280301

申请日：2019-09-27

Applicant: Dow Global Technologies LLC

Inventor： Robert D. J. Froese ,  Daniel J. Arriola ,  Bryan D. Stubbert

IPC: C08F210/18 ,  C08F210/16

CPC classification number: C08F210/18

Abstract: The present process embodiments for synthesizing long-chain branched copolymers include contacting together one or more C2-C14 alkene monomers, at least one diene or polyene, optionally a solvent, and a multi-chain catalyst. The multi-chain catalyst includes a plurality of polymerization sites and produces at least two polymer chains of the C2-C14 alkene monomers, each polymer chain polymerizing at one of the polymerization sites. The process synthesizes the long-chain branched polymers by connecting the two polymer chains with the diene or polyene, the joining of the two polymer chains being performed in a concerted manner during the polymerization.

公开(公告)号：US20230167223A1

公开(公告)日：2023-06-01

申请号：US17997486

申请日：2021-04-30

Applicant: Dow Global Technologies LLC

Inventor： Arkady L. Krasovskiy ,  Evelyn Auyeung ,  Bryan D. Stubbert ,  Anna V. Davis ,  Jianbo Hou ,  Clark H. Cummins

IPC: C08F293/00

CPC classification number: C08F293/005 ,  C08F2438/03

Abstract: The present disclosure relates to a process for preparing an olefin-acrylate block copolymer, the process comprising: a) performing reversible addition-fragmentation chain-transfer (RAFT) polymerization by combining RAFT materials comprising an acrylate monomer, a radical initiator, and a RAFT agent, thereby forming a macroinitiator; and b) combining reaction materials comprising an alpha-substituted acrylate, a radical initiator, and the macroinitiator, thereby forming the olefin-acrylate block copolymer.

公开(公告)号：US20210388131A1

公开(公告)日：2021-12-16

申请号：US17280303

申请日：2019-09-27

Applicant: Dow Global Technologies LLC

Inventor： Robert D.J. Froese ,  Daniel J. Arriola ,  Teresita Kashyap ,  Bryan D. Stubbert

IPC: C08F210/16

Abstract: Ethylene-based polymers comprise reaction products of polymerizing ethylene monomer, at least one diene or polyene comonomer, and optionally at least one C3 to C14 comonomer under defined polymerization reaction conditions, the ethylene-based polymer having: an Mw/Mw0 greater than 1.20. The Mw0 is the initial weight-average molecular weight of a comparative ethylene-based polymer by gel permeation chromatography. The comparative ethylene-based polymer being a reaction product of polymerizing ethylene monomer and all C3 to C14 comonomers present in the ethylene-based polymer, if any, without the at least one polyene comonomer, under the defined polymerization reaction conditions; and a molecular weight tail quantified by an MWD area metric, ATAIL, and ATAIL is less than or equal to 0.04 as determined by gel permeation chromatography using a triple detector.

公开(公告)号：US20220396653A1

公开(公告)日：2022-12-15

申请号：US17773586

申请日：2020-12-17

Applicant: Dow Global Technologies LLC

Inventor： Evelyn Auyeung ,  Arkady L. Krasovskiy ,  Bryan D. Stubbert ,  Anna V. Davis ,  Jianbo Hou ,  Clark H. Cummins

IPC: C08F293/00 ,  C08F220/18

Abstract: The present disclosure relates to a process for preparing an olefin-acrylate diblock copolymer, the process comprising: a) performing nitroxide-mediated polymerization (NMP) by combining NMP materials comprising an acrylate monomer and a nitroxide initiator, thereby forming a nitroxide macroinitiator; and b) combining end-capping-reaction materials comprising an alpha-substituted acrylate and the nitroxide macroinitiator, thereby forming the olefin-acrylate diblock copolymer.

公开(公告)号：US20220227904A1

公开(公告)日：2022-07-21

申请号：US17623134

申请日：2020-06-26

Applicant: Dow Global Technologies LLC

Inventor： Bryan D. Stubbert

IPC: C08F210/16 ,  C07F7/00

Abstract: Embodiments of this disclosure include catalyst systems comprising a metal-ligand complex according to formula (I):

公开(公告)号：US20210332165A1

公开(公告)日：2021-10-28

申请号：US17260171

申请日：2019-07-29

Applicant: Dow Global Technologies LLC

Inventor： Bryan D. Stubbert

IPC: C08F4/76 ,  C08F10/02 ,  C07F7/00

Abstract: Embodiments are directed to catalyst systems comprising at least one metal ligand complex and to processes for polyolefin polymerization incorporating the catalyst systems. The metal ligand complexes have the following structures: (I)

公开(公告)号：US20200270376A1

公开(公告)日：2020-08-27

申请号：US16646237

申请日：2018-09-19

Applicant: Dow Global Technologies LLC

Inventor： Arkady L. Krasovskiy ,  David R. Wilson ,  Bryan D. Stubbert ,  Tulaza Vaidya ,  Jerzy Klosin ,  Edmund M. Carnahan ,  Philip P. Fontaine ,  Mari S. Rosen

IPC: C08F4/6592 ,  C07F7/08

Abstract: Embodiments are directed to a catalyst system comprising metal ligand complexes and processes for polyolefin polymerization using the metal ligand complex having the following structure: where each X is selected from the group consisting of —(CH2)SiRX3.