公开(公告)号：US20230257520A1

公开(公告)日：2023-08-17

申请号：US18137822

申请日：2023-04-21

申请人： Covation Inc.

发明人： Hari Babu SUNKARA ,  Raja Hari POLADI

IPC分类号： C08G63/672 ,  C08G63/82 ,  C08G63/85 ,  C08G63/90 ,  C08K5/08

CPC分类号： C08G63/672 ,  C08G63/826 ,  C08G63/85 ,  C08G63/90 ,  C08K5/08

摘要： A process is disclosed herein comprising the steps: a) contacting a mixture comprising furandicarboxylic acid dialkyl ester, 1,3-propanediol, a zinc compound, and optionally a poly(alkylene ether) diol, at a temperature in the range of from about 120° C. to about 220° C. to form prepolymer, wherein the mole ratio of the furandicarboxylic acid dialkyl ester to the 1,3-propanediol is in the range of from 1:1.3 to 1:2.2; and b) heating the prepolymer under reduced pressure to a temperature in the range of from about 220° C. to about 260° C. to form polymer. The mixture of step a) can further comprise an anthraquinone compound.

公开(公告)号：US20230265239A1

公开(公告)日：2023-08-24

申请号：US18141613

申请日：2023-05-01

申请人： Covation Inc.

发明人： Hari Babu SUNKARA ,  Paul J. Pigliacampi

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

CPC分类号： C08G63/672 ,  C08G63/181 ,  C08G63/85 ,  C08K5/18

摘要： 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

公开(公告)号：US20240218118A1

公开(公告)日：2024-07-04

申请号：US18601303

申请日：2024-03-11

申请人： Covation Inc.

发明人： Hari Babu SUNKARA ,  Paul J. PIGLIACAMPI

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

CPC分类号： C08G63/672 ,  C08G63/181 ,  C08G63/85 ,  C08K5/18

摘要： 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