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    Fluoropolymers
    41.
    发明授权
    Fluoropolymers 有权

    公开(公告)号：US10570231B2

    公开(公告)日：2020-02-25

    申请号：US15987049

    申请日：2018-05-23

    Applicant: Arkema Inc.

    Inventor： Ramin Amin-Sanayei

    IPC: C08F14/22 ,  C08F14/24 ,  C08F14/26 ,  C08F14/28 ,  C08F2/00 ,  C08F214/22 ,  C08F214/18 ,  H01M4/62

    Abstract: The invention relates to novel linear, semi-crystalline fluoropolymers containing 0.5 to 25 mole percent of at least one vinyl ester monomer unit. At least 40 mole percent of the vinyl ester monomer units are present in the copolymer as single monomer units (not diads or triads or greater) between two fluoromonomer units. The invention also relates to a process for forming the fluoromonomers/vinyl ester copolymer. The fluoropolymer of the invention may be used in applications benefiting from a functional fluoropolymers including as a binder or coating in batteries, or for use in forming hydrophilic membranes and hollow fibers.

    PROCESSES AND SYSTEMS FOR RECOVERING METHANESULFONIC ACID IN PURIFIED FORM
    45.
    发明申请
    PROCESSES AND SYSTEMS FOR RECOVERING METHANESULFONIC ACID IN PURIFIED FORM 审中-公开

    公开(公告)号：US20200039926A1

    公开(公告)日：2020-02-06

    申请号：US16485464

    申请日：2018-05-08

    Applicant: Arkema Inc.

    Inventor： Jay F. MILLER ,  Gary S. SMITH ,  George C. FORTMAN ,  Vijay R. SRINIVAS

    IPC: C07C303/44 ,  C07C309/04

    Abstract: Aspects of the invention relate to systems and processes for recovering methanesulfonic acid, in a purified form, from a composition additionally including sulfur trioxide. In accordance with one aspect, the invention provides a process that includes separating a feed stream comprised of hydrocarbons, methanesulfonic acid, sulfur trioxide, and optionally sulfuric acid to produce a light stream comprised of hydrocarbons and a heavy stream comprised of methanesulfonic acid and sulfur trioxide; contacting (e.g., by mixing) the heavy stream with a reactive additive capable of reacting with sulfur trioxide, under conditions effective to cause reaction of the reactive additive with the sulfur trioxide to produce a heavy reaction product having a boiling point higher than the boiling point of methanesulfonic acid; and separating the heavy stream using a distillation column to produce a distillate stream consisting essentially of methanesulfonic acid and a bottoms stream comprising the heavy reaction product.

    PROCESSES AND SYSTEMS FOR RECOVERING R1233ZD IN PURIFIED FORM
    47.
    发明申请
    PROCESSES AND SYSTEMS FOR RECOVERING R1233ZD IN PURIFIED FORM 审中-公开

    公开(公告)号：US20200010392A1

    公开(公告)日：2020-01-09

    申请号：US16468416

    申请日：2017-12-14

    Applicant: Arkema Inc.

    Inventor： Jay F. Miller ,  John A. Wismer (Deceased)

    IPC: C07C17/386 ,  C07C21/18

    Abstract: Aspects of the invention relate to systems and processes for recovering R1233zd in purified form from compositions additionally comprising hydrogen fluoride. In accordance with one aspect, the invention provides a process that includes separating a feed stream comprised of hydrogen fluoride and R1233zd using azeotropic distillation in a first distillation column to produce a first distillate stream comprised of hydrogen fluoride and R1233zd and a first bottoms stream consisting essentially of hydrogen fluoride. The first distillation column is operated at a first pressure. The process further includes separating the first distillate stream using azeotropic distillation in a second distillation column to produce a second distillate stream comprised of hydrogen fluoride and R1233zd and a second bottoms stream consisting essentially of R1233zd. The second distillation column is operated at a second pressure that may be different than the first pressure of the first distillation column.

    ACRYLIC PROCESS AID FOR VINYL FOAM EXTRUSION
    48.
    发明申请
    ACRYLIC PROCESS AID FOR VINYL FOAM EXTRUSION 审中-公开

    公开(公告)号：US20190390050A1

    公开(公告)日：2019-12-26

    申请号：US16561086

    申请日：2019-09-05

    Applicant: Arkema Inc.

    Inventor： Paul R. Lavallee

    IPC: C08L27/06

    Abstract: The present invention relates to an acrylic process aid useful in vinyl foam extrusion. The process aid is an acrylic copolymer containing from 50 to 79 weight percent of methyl methacrylate monomer units and has a Tg of less than 90° C., preferably less than 70° C., and more preferably less than 65° C. PVC and CPVC foams containing this acrylic process aid fuse faster at the same temperature, or fuse in the same time at lower temperatures than foam formulations currently used.

    Voided latex particles
    49.
    发明授权
    Voided latex particles 有权

    公开(公告)号：US10442882B2

    公开(公告)日：2019-10-15

    申请号：US15504373

    申请日：2015-08-07

    Applicant: Arkema Inc.

    Inventor： Lily Liu ,  Wayne Devonport ,  Daniel Edward Stark ,  Matthew F. Boudreaux

    IPC: C08F285/00 ,  C08J9/16 ,  C08F6/00

    Abstract: A process for forming voided latex particles is improved by combining swelling and polymerization of an outer shell into a single step. The process includes contacting multi-stage emulsion polymer particles comprising a core, at least one intermediate shell, with a swelling agent, and polymerizing an outer shell after said contacting with swelling agent wherein the core and the at least one intermediate shell are contacted with swelling agent in the presence of less than 0.5% monomer based on the weight of the multi-stage emulsion polymer particles, and substantially all of the swelling occurs during polymerization of the outer shell.

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