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公开(公告)号：US6084055A
公开(公告)日：2000-07-04
申请号：US281529
申请日：1999-03-30
IPC分类号： C08G63/82 , C08G63/199 , C08G63/672 , C08G63/685 , C08G63/78 , C08G63/83 , C08G63/84 , C08G63/85 , C08G63/02
CPC分类号： C08G63/78 , C08G63/199 , C08G63/672 , C08G63/6856 , C08G63/85 , C08G63/826 , C08G63/83 , C08G63/84
摘要： Polyesters such as poly(1,4-cyclohexanedimethyl-1,4-cyclohexanedicarboxylate) are prepared by the reaction of at least one relatively non-volatile diol, preferably 1,4-cyclohexanedimethanol, with a 1,4-cyclohexanedicarboxylic acid ester in the presence of a catalyst such as a tetraalkyl titanate. Maximum molecular weight and crystallinity are provided by at least one of two options: conducting the reaction at a series of progressively increasing temperatures below 265.degree. C., with a residence time in the range of 40-120 minutes at temperatures above 250.degree. C.; and conducting an initial stage of the reaction in the presence of at least one C.sub.2-6 aliphatic diol such as ethylene glycol, diethylene glycol or 1,4-butanediol.
摘要翻译： 通过至少一种相对不挥发的二醇，优选1,4-环己烷二甲醇与1,4-环己烷二羧酸酯的反应制备聚（1,4-环己烷二甲基-1,4-环己烷二羧酸酯）等聚酯 存在催化剂如钛酸四烷基酯。 最大分子量和结晶度由两种选择中的至少一种提供：在一系列逐渐升高的温度低于265℃下进行反应，在高于250℃的温度下停留时间为40-120分钟。 ; 并在至少一种C 2-6脂族二醇如乙二醇，二甘醇或1,4-丁二醇的存在下进行反应的初始阶段。
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72.发明授权
公开(公告)号：US5939519A
公开(公告)日：1999-08-17
申请号：US75914
申请日：1998-05-11
IPC分类号： C08G69/44
CPC分类号： C08G69/44
摘要： The crystallinity of poly(1,4-cyclohexanedimethyl 1,4-cyclohexanedicarboxylate) is enhanced by the incorporation of amide units, preferably derived from such compounds as 1,6-bis(4-carbomethoxycyclohexylcarboxamido)hexane. Crystallization temperatures increase, as do heats of crystallization.
摘要翻译： 聚（1,4-环己烷二甲基1,4-环己烷二羧酸酯）的结晶度通过引入优选衍生自诸如1,6-双（4-甲酯基环己基甲酰胺基）己烷的化合物的酰胺单元来增强。 晶体结晶温度也会升高。
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公开(公告)号：US5668186A
公开(公告)日：1997-09-16
申请号：US618742
申请日：1996-03-20
CPC分类号： C08J11/18 , C08J2367/02 , Y02W30/706
摘要： The invention relates to a novel process for depolymerizing polyesters by subjecting the polyesters to catalysts and organic solvents which are substantially free of oxygen and water in order to produce macrocyclic polyester oligomers substantially free of hydroxybutyl terminated linear impurities.
摘要翻译： 本发明涉及通过使聚酯经受基本上不含氧和水的催化剂和有机溶剂来解聚聚酯的新方法，以便制备基本上不含羟基丁基封端的线性杂质的大环聚酯低聚物。
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公开(公告)号：US5648454A
公开(公告)日：1997-07-15
申请号：US600643
申请日：1996-02-14
IPC分类号： C08G63/183 , C08G63/85 , C08F6/00 , C08J3/00
CPC分类号： C08G63/183 , C08G63/85
摘要： A process for making high ductile and high melting point polyesters comprising the step of contacting macrocyclic copolyester oligomers having structural units with C.sub.4 alkylene bridging radicals and structural units with bridging radicals other than C.sub.4 alkylenes, and a polymerization catalysts.
摘要翻译： 一种制备高韧性和高熔点聚酯的方法，包括使具有C4亚烷基桥连基团和结构单元的具有结构单元的大环共聚酯低聚物与除C4烷基以外的桥接基团接触的步骤和聚合催化剂。
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