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    Controlled radical polymerization in water-in-water dispersion
    11.
    发明申请
    Controlled radical polymerization in water-in-water dispersion 审中-公开

    公开(公告)号：US20190085110A1

    公开(公告)日：2019-03-21

    申请号：US16191698

    申请日：2018-11-15

    Applicant: RHODIA OPERATIONS

    Inventor： Mathias DESTARAC ,  David James WILSON ,  Silvia STOILOVA

    IPC: C08F220/56 ,  C09D153/00 ,  C08F2/38 ,  C08F2/10 ,  C09J153/00 ,  C08F293/00

    Abstract: The present invention relates to a method for preparing an aqueous dispersion of water-soluble polymers, which comprises a step (E) of radical polymerization, wherein the following are brought into contact in an aqueous medium (M) in which the synthesised polymer is not soluble: at least one ethylenically unsaturated monomer which is soluble in the aqueous medium (M); at least one source of free radicals; and a reactive stabiliser which comprises: a polymer chain (CP) which is soluble in the medium (M), a group (G) providing the radical polymerization of step (E) with a living and controlled nature, such as, for example, a group carrying a thiocarbonylthio —S(C═S)— group.

    AMPHIPHILIC BLOCK POLYMERS SOLUBLE IN STRONGLY SALINE MEDIUM
    12.
    发明申请
    AMPHIPHILIC BLOCK POLYMERS SOLUBLE IN STRONGLY SALINE MEDIUM 审中-公开

    公开(公告)号：US20180312621A1

    公开(公告)日：2018-11-01

    申请号：US15770352

    申请日：2016-10-21

    Applicant: RHODIA OPERATIONS

    Inventor： David James WILSON ,  Mikel MORVAN ,  Max CHABERT ,  Arnaud CADIX

    IPC: C08F293/00 ,  C09K8/68 ,  C09K8/588

    Abstract: The present invention relates to the preparation of polymers that are of use in particular as a rheology agent, and are suitable for use in very concentrated saline media, which comprises a step of micellar radical polymerization in which are brought into contact, in an aqueous medium: —hydrophilic monomers; —hydrophobic monomers in the form of a micellar solution, containing micelles comprising these hydrophobic monomers; —a radical polymerization initiator; and —preferably an agent for controlling radical polymerization, wherein said micelles comprise at least one surfactant of amphoteric nature. The polymers obtained according to the invention are in particular of use for enhanced oil recovery.

    COPOLYMER COMPRISING UNITS OF TYPE A DERIVING FROM CARBOXYLIC ACID MONOMERS AND UNITS OF TYPE B DERIVING FROM SULFONIC ACID MONOMERS
    15.
    发明申请
    COPOLYMER COMPRISING UNITS OF TYPE A DERIVING FROM CARBOXYLIC ACID MONOMERS AND UNITS OF TYPE B DERIVING FROM SULFONIC ACID MONOMERS 有权

    公开(公告)号：US20220340841A1

    公开(公告)日：2022-10-27

    申请号：US17854835

    申请日：2022-06-30

    Applicant: RHODIA OPERATIONS

    Inventor： Céline ORIZET ,  David James WILSON ,  Julie CLAVIER ,  Eric Van Gramberen

    IPC: C11D3/37 ,  C08F293/00

    Abstract: The present invention relates to a copolymer comprising units of type A deriving from carboxylic acid monomers and units of type B deriving from sulfonic acid monomers, said units of type A and B representing more than 80 mol % of the total moles of units in the copolymer,
    characterized in that it comprises at least:
    one first block formed of at least 95 mol % of units of type A and having a degree of polymerization DP1 comprised between 5 and 150; and
    one second block formed of at least 95 mol % of units of type A and B with a molar ratio of units of type A to units of type B greater or equal to 1, wherein said units of type A and units of type B are statistically distributed, said second block having a degree of polymerization DP2 such that DP2/DP1≥1.
    It also relates to new detergent compositions comprising such a copolymer, and to the use of this copolymer in a detergent composition, especially an ADW composition, to prevent, limit or eliminate the filming phenomena.

    SEQUENCED POLYMERS FOR MONITORING THE FILTRATE
    17.
    发明申请
    SEQUENCED POLYMERS FOR MONITORING THE FILTRATE 审中-公开

    公开(公告)号：US20180105731A1

    公开(公告)日：2018-04-19

    申请号：US15564801

    申请日：2016-04-06

    Applicant: RHODIA OPERATIONS

    Inventor： Arnaud CADIX ,  David James WILSON

    IPC: C09K8/46 ,  C08F291/00 ,  C08F293/00 ,  C08F261/04

    Abstract: The invention relates to a method for preparing a sequenced copolymer comprising a first block (A) connected to a second block (B), said method comprising the following steps of monitored radical polymerisation: (E1) bringing into contact, typically in an aqueous medium: unsaturated ethylene monomers mA, selected in order to constitute the block (A); a source of free radicals; and an agent for monitoring the radical polymerisation; and then (E2) bringing into contact: the polymer obtained from step (E1); unsaturated ethylene monomers mB; a source of free radicals; and a polymer P0 which is not ethylenically unsaturated and supports labile hydrogens.

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