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1. 发明授权

US5236959A Process for recycling polyester/cotton blends 失效
标题翻译：聚酯/棉混纺的回收工艺
公开(公告)号：US5236959A
公开(公告)日：1993-08-17
申请号：US851035
申请日：1992-03-12
申请人： Etheridge O. Oakley , Frederick J. Gorman , James D. Mason
发明人： Etheridge O. Oakley , Frederick J. Gorman , James D. Mason
IPC分类号： C07C67/03 , C08B3/06 , D06M11/38 , D06M13/144
CPC分类号： D06M13/144 , C07C67/03 , C08B3/06 , D06M11/38 , D06M11/385
摘要： A process for recycling polyester/cotton blends by reducing the polyester to a lower dialkyl ester of terephthalic acid and reducing the cotton to cellulose acetate. The novel process to recycle the polyester/cotton blends includes the steps of (a) providing a blend of polyester and cotton fibers; (b) subjecting the polyester/cotton blend to a first alcoholysis in a bath containing an alcohol and an effective catalyst at a suitable temperature until the polyester is depolymerized to a lower molecular weight polyester oligomer; (c) remove the cotton fibers from the alcoholic solution of oligomers and process the recovered cotton fibers by pulping and acetylyzing processes to recover the cellulose acetate; and (d) alcoholyze the low molecular weight polyester oligomers to produce the lower dialkyl ester of terephthalic acid.
摘要翻译：通过将聚酯还原成对苯二甲酸的低级二烷基酯并将棉花还原成乙酸纤维素来回收聚酯/棉混纺物的方法。回收聚酯/棉混纺的新方法包括以下步骤：（a）提供聚酯和棉纤维的混合物; （b）在合适的温度下使聚酯/棉混合物在含有醇和有效催化剂的浴中进行第一次醇解，直到聚酯解聚成低分子量聚酯低聚物; （c）从低聚物的醇溶液中除去棉纤维，并通过制浆和乙酰化方法处理回收的棉纤维以回收乙酸纤维素; 和（d）将低分子量聚酯低聚物醇溶，生成对苯二甲酸的低级二烷基酯。

2. 发明授权

US4083829A Melt processable thermotropic wholly aromatic polyester 失效
标题翻译：熔融加工热性全芳族聚酯
公开(公告)号：US4083829A
公开(公告)日：1978-04-11
申请号：US789374
申请日：1977-04-20
申请人： Gordon W. Calundann , Herbert L. Davis , Frederick J. Gorman , Robert M. Mininni
发明人： Gordon W. Calundann , Herbert L. Davis , Frederick J. Gorman , Robert M. Mininni
IPC分类号： C08G63/60 , D01F6/84 , C08G63/06 , C08G63/18
CPC分类号： D01F6/84 , C08G63/60
摘要： A wholly aromatic polyester is provided which has been found to be highly amenable to melt extrusion to yield high performance fibers. Such fibers following thermal treatment exhibit high tenacity and tensile modulus properties which are well retained at elevated temperatures while exhibiting a low degree of shrinkage. Unlike wholly aromatic polyesters normally encountered in the prior art, the polymer of the present invention is not intractable and may be melt extruded with ease at temperatures below approximately 300.degree. C., and preferably below approximately 280.degree. C. The aromatic polyester of the present invention consists essentially of recurring units (a) p-oxybenzoyl moiety, (b) 2,6-dicarboxynaphthalene moiety, (c) symmetrical dioxy aryl moiety (as defined), and (d) isophthaloyl moiety and/or metal-dioxy phenylene moiety, and is free of units which possess ring substitution. The wholly aromatic polyester of the present invention forms an atypical thermotropic melt phase which is exhibited in the absence of ring substitution at a relatively low temperature which facilitates fiber formation with ease. The wholly aromatic polyester of the present invention following melt spinning and thermal treatment commonly can exhibit an average single filament tenacity of at least 15 grams per denier, and an average single filament tensile modulus of at least 300 grams per denier.
摘要翻译：提供了一种全芳族聚酯，已被发现是高度易于熔融挤出以产生高性能纤维。热处理后的这种纤维表现出高强度和拉伸模量性能，它们在升高的温度下良好地保持，同时表现出低的收缩率。与现有技术中通常遇到的全芳族聚酯不同，本发明的聚合物不难处理，并且可以在低于约300℃，优选低于约280℃的温度下容易地熔融挤出。本发明的芳族聚酯本发明基本上由重复单元（a）对羟基苯甲酰部分，（b）2,6-二羧基萘部分，（c）对称的二氧基芳基部分（如所定义））和（d）间苯二酰部分和/或金属二氧基亚苯基部分并且没有具有环取代的单元。本发明的全芳族聚酯形成非典型的热致熔融相，其在相对较低的温度下在不存在环取代的情况下表现出来，这便于轻松形成纤维。熔融纺丝和热处理后本发明的全芳族聚酯通常可显示至少15克/旦尼尔的平均单丝强度，平均单丝拉伸模量至少为300克/旦尼尔。

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