PROCESS FOR PREPARING POLY(ALKYLENE FURANDICARBOXYLATE)

    公开(公告)号:US20240218118A1

    公开(公告)日:2024-07-04

    申请号:US18601303

    申请日:2024-03-11

    Applicant: Covation Inc.

    CPC classification number: C08G63/672 C08G63/181 C08G63/85 C08K5/18

    Abstract: A process to prepare poly(alkylene furandicarboxylate) polymer is disclosed herein. In one embodiment, the process comprises a) contacting a mixture comprising furandicarboxylic acid dialkyl ester, a diol comprising ethylene glycol, 1,3-propanediol, 1,4-butanediol, 1,4cyclohexanedimethanol, or mixtures thereof, and a metal catalyst at a temperature in the range of from about 140° C. to about 220° C. to form prepolymer, wherein the mole ratio of the furandicarboxylic acid dialkyl ester to



    a) the diol is in the range of from 1:1.3 to 1:2.2;
    b) performing polycondensation by heating the prepolymer under
    reduced pressure to a temperature in the range of from about 220° C. to about 260° C. to form poly(alkylene furandicarboxylate) polymer; wherein the rate of polycondensation in step c) is faster with the anthraquinone compound present than without; and
    c) adding at least one anthraquinone compound as disclosed herein; and

    PROCESS FOR THE PREPARATION OF A POLYESTER
    9.
    发明申请

    公开(公告)号:US20180258219A1

    公开(公告)日:2018-09-13

    申请号:US15759243

    申请日:2016-09-14

    Applicant: Synvina C.V.

    Inventor: Laszlo Sipos

    CPC classification number: C08G63/16 C08G63/181 C08G63/78

    Abstract: A polyester including ethylene 2,5-furandicarboxylate units is prepared in a process, where in an esterification step a 2,5-furandicarboxylate compound is reacted with ethylene glycol to form an ester composition, including components with 2-hydroxyethyl and 2,5-furandicarboxylate moieties; where in a polycondensation step the ester composition thus obtained is subjected to polycondensation at reduced pressure in the presence of a polycondensation catalyst to obtain a polycondensate; and where during the polycondensation step 2,5-furandicarboxylic acid is added to the ester composition.

Patent Agency Ranking