发明名称 |
POLY(1,3-PROPYLENE-CO-1,4:3,6-DIANHYDRO-D-SORBITOL TEREPHTHALATE) AND MANUFACTURING PROCESS |
摘要 |
A melt polymerization process for the preparation of poly(1,3-propylene-co-isosorbide) terephthalate (3GIT), new 3GITs and products made from the 3GITs. The process comprises (a) providing a mixture comprising terephthalic acid or its alkyl ester, 1,3-propanediol and isosorbide in a molar ratio of diols to terephthalic acid or its alkyl ester of from about 1.1:1 to about 1.6:1 and a molar ratio of 1,3-propanediol to isosorbide of from about 2:1 to about 10:1; (b) reacting the mixture in an inert atmosphere at a temperature of about 180 to about 245 DEG C, with concurrent removal of a distillate comprising at least 80% of the water or alkanol volatile reaction product, wherein the distillate contains less than about 5 weight % 1,3-propanediol and less than 1 weight % isosorbide; and (c) continuing the reaction in the presence of a polycondensation catalyst at a pressure of about 0.25 to about 2 mm Hg and about 245 to about 260°C to form a 3GIT containing about 4 to about 20 mole % isosorbide units, based on the 3GIT. |
申请公布号 |
WO03106383(A2) |
申请公布日期 |
2003.12.24 |
申请号 |
WO2003US18621 |
申请日期 |
2003.06.12 |
申请人 |
E. I. DU PONT DE NEMOURS AND COMPANY |
发明人 |
ADELMAN, DOUGLAS, J.;GREENE, ROBIN, N.;PUTZIG, DONALD, E. |
分类号 |
C08G63/672;C08G63/80;C08G63/82 |
主分类号 |
C08G63/672 |
代理机构 |
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