利索-全球专利检索

  1. Login
  2. Sign Up

Search Results

10 records (took 0.013 seconds)

    PROCESS FOR PREPARING POLY(ALKYLENE FURANDICARBOXYLATE)
    1.
    发明公开
    PROCESS FOR PREPARING POLY(ALKYLENE FURANDICARBOXYLATE) 审中-公开

    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.

    Inventor： Hari Babu SUNKARA ,  Paul J. PIGLIACAMPI

    IPC: C08G63/672 ,  C08G63/181 ,  C08G63/85 ,  C08K5/18

    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 PREPARING POLY(ALKYLENE FURANDICARBOXYLATE)
    5.
    发明公开
    PROCESS FOR PREPARING POLY(ALKYLENE FURANDICARBOXYLATE) 审中-公开

    公开(公告)号：US20230265239A1

    公开(公告)日：2023-08-24

    申请号：US18141613

    申请日：2023-05-01

    Applicant: Covation Inc.

    Inventor： Hari Babu SUNKARA ,  Paul J. Pigliacampi

    IPC: C08G63/672 ,  C08G63/181 ,  C08G63/85 ,  C08K5/18

    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, 1,4-cyclohexanedimethanol, 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 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

    SOLVENT-FREE MELT POLYCONDENSATION PROCESS OF MAKING FURAN BASED POLYAMIDES
    6.
    发明公开
    SOLVENT-FREE MELT POLYCONDENSATION PROCESS OF MAKING FURAN BASED POLYAMIDES 审中-公开

    公开(公告)号：US20230212354A1

    公开(公告)日：2023-07-06

    申请号：US18121831

    申请日：2023-03-15

    Applicant: Covation Inc.

    Inventor： Simona PERCEC ,  Stephen Neal BAIR

    IPC: C08G63/672 ,  C08G63/183 ,  C08G63/86 ,  B29C49/00

    CPC classification number: C08G63/672 ,  C08G63/183 ,  C08G63/866 ,  B29C49/0005 ,  B29K2067/003

    Abstract: Disclosed herein are processes of making furan-based polyamides using solvent-free melt condensation of a diamine and an ester derivative of 2,5-furandicarboxylic acid with a C2 to C12 aliphatic diol or a polyol. The processes comprise a) forming a reaction mixture by mixing one or more diamines, a diester comprising an ester derivative of 2,5-furandicarboxylic acid with a C2 to C12 aliphatic diol or a polyol, and a catalyst, such that the diamine is present in an excess amount of at least 1 mol % with respect to the diester amount; and b) melt polycondensing the reaction mixture in the absence of a solvent at a temperature in the range of 60° C. to a maximum temperature of 250° C. under an inert atmosphere, while removing alkyl alcohol to form a furan-based polyamide, wherein the one or more diamines comprises an aliphatic diamine, an aromatic diamine, or an alkylaromatic diamine.

Patent Agency Ranking