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    RHEOLOGY MODIFIED OLEFIN-BASED POLYMER COMPOSITIONS
    1.
    发明公开
    RHEOLOGY MODIFIED OLEFIN-BASED POLYMER COMPOSITIONS 审中-公开

    公开(公告)号：US20240076458A1

    公开(公告)日：2024-03-07

    申请号：US18549098

    申请日：2022-05-11

    Applicant: Dow Global Technologies LLC

    Inventor： Jeffrey C. Munro ,  Santosh S. Bawiskar ,  Colin Li Pi Shan ,  Alexander Williamson ,  Teresa P. Karjala

    IPC: C08J3/24 ,  C08J3/28

    CPC classification number: C08J3/247 ,  C08J3/28 ,  C08J2323/08 ,  C08J2323/22

    Abstract: A process to form a rheology modified composition, the process comprising applying radiation, and optionally heat, to a composition that comprises at least the following component: a) an olefin-based polymer comprising a total unsaturation ≥0.20 /1000 C; and wherein the radiation is applied using an electron beam (e-beam) at a dosage selected from 0.1 MRad to 1.5 MRad; and wherein component a is selected from a telechelic polyolefin of the formula A1L1L2A2, an unsaturated polyolefin of the formula A1L1, or an ethylene/alpha-olefin interpolymer. A process to form a rheology modified composition, the process comprising applying heat, and optionally radiation, to a composition that comprises at least the following components: a) an olefin-based polymer, as described above, comprising a total unsaturation ≥0.20/1000 C; b) from 1.0 to 100 ppm of a peroxide, based on the weight of the composition.

    Ethylene-based polymers with new distributions of terminal and internal unsaturations
    4.
    发明授权
    Ethylene-based polymers with new distributions of terminal and internal unsaturations 有权

    公开(公告)号：US11136419B2

    公开(公告)日：2021-10-05

    申请号：US16634914

    申请日：2018-07-13

    Applicant: Dow Global Technologies LLC

    Inventor： Otto J. Berbee ,  Stefan Hinrichs ,  Bharat I. Chaudhary ,  Teresa P. Karjala ,  John O. Osby ,  Jose Ortega

    IPC: C08F2/01 ,  C08F10/02 ,  C08F210/02 ,  C08F2/38 ,  C08F2/00

    Abstract: A high pressure, free radical polymerization process to form an ethylene-based polymer, the process comprising at least the following step: polymerizing a reaction mixture comprising ethylene, using a polymerization system comprising the following: (A) a reactor configuration comprising at least one reactor that comprises at least two reaction zones, a first reaction zone (reaction zone 1) and an ith reaction zone (where i≥2); wherein the ith reaction zone is the last reaction zone, and wherein i is the total number of reaction zones; (B) at least two ethylene-based feed streams, a first ethylene-based feed stream and an nth ethylene-based feed stream, wherein the first ethylene-based feed stream is sent to the first reaction zone, and the nth ethylene-based feed stream is the last ethylene based feed stream sent to the reactor configuration; wherein n≤i; and RZn/RZ1 does not equal 1.0, where RZ1=mole fraction of make-up ethylene in the first ethylene-based feed stream to the first reaction zone; where RZn=mole fraction of make-up ethylene in the last ethylene-based feed stream sent to the reactor configuration; (C) a control system to control the percentage of the make-up ethylene in the first ethylene-based feed stream, and the percentage of the make-up ethylene in the nth ethylene-based feed stream; and wherein at least one reaction zone receives a CTA make-up feed stream comprising an alpha-olefin, and wherein the alpha-olefin has a chain transfer activity constant (Cs) value ≤0.10, and wherein the chain transfer activity constant (Cs) is measured at 1360 atm, 130° C.

    Process for producing functionalized ethylene-based polymers with a low gel content
    8.
    发明授权
    Process for producing functionalized ethylene-based polymers with a low gel content 有权

    公开(公告)号：US10730987B2

    公开(公告)日：2020-08-04

    申请号：US16072323

    申请日：2017-01-26

    Applicant: Dow Global Technologies LLC

    Inventor： Mehmet Demirors ,  Sean Ewart ,  Teresa P. Karjala

    IPC: C08K5/01 ,  C08F255/02 ,  C08F222/06 ,  C08K5/14 ,  C08K5/23 ,  C08F210/16

    Abstract: Functionalized ethylene-based polymers are prepared by a process comprising the step of reacting a first composition comprising an ethylene-based polymer with at least the following: (A) at least one carbon-carbon (C—C) free radical initiator of Structure I: wherein R1, R2, R3, R4, R5 and R6 are each, independently, hydrogen or a hydrocarbyl group; and wherein, optionally, two or more R groups (R1, R2, R3, R4, R5 and R6) form a ring structure; and with the provisos that (i) at least one of R2 and R5 is a hydrocarbyl group of at least two carbon atoms, and (ii) at least one of R3 and R6 is a hydrocarbyl group of at least two carbon atoms; and (B) at least one free radical initiator other than the carbon-carbon (C—C) free radical initiator of Structure I (a non-C—C free radical initiator), e.g., a peroxide; and (C) at least one functionalization agent, e.g., maleic anhydride.

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