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1.发明授权Polybutylene terephthalate having low carboxyl group concentration and loose tube for optical fiber comprising the same 失效具有低羧基浓度的聚对苯二甲酸丁二醇酯和包含其的光纤松套管
公开(公告)号：US5709916A
公开(公告)日：1998-01-20
申请号：US688290
申请日：1996-07-29
CPC分类号： G02B6/4486 , C08G63/183 , Y10T428/1352
摘要： A loose tube for an optical fiber comprising a polybutylene terephthalate. The polybutylene terephthalate has a terminal carboxyl group concentration of 10 eq./10.sup.6 g.multidot.polymer or less and an intrinsic viscosity �.eta.!, measured at 25.degree. C. in orthochlorophenol, of 0.9 to 1.4 dl/g.
摘要翻译： 用于包含聚对苯二甲酸丁二醇酯的光纤的松套管。 聚对苯二甲酸丁二醇酯的末端羧基浓度为10当量/ 10 6 g聚合物或更低，在邻氯苯酚中在25℃下测得的特性粘度η为0.9至1.4dl / g。
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2.发明授权公开(公告)号：US06340443B1
公开(公告)日：2002-01-22
申请号：US09607968
申请日：2000-06-30
IPC分类号： B29C4738
摘要： A polyester composition containing fine particles with an average size of 0.03-1.8 &mgr;m which have been surface-modified with polyester (B) of which less than 70 mole percent of the repeating units consist of ethylene terephthalate, butylene terephthalate or ethylene naphthalate units, in polyester (A) of which at least 70 mole percent of the repeating units consist of ethylene terephthalate, butylene terephthalate or ethylene naphthalate units. The composition has a filtration pressure increase rate of no greater than 10 kg cm2/hr when filtered using a double layer of 2400 mesh wire filters with an inner diameter of 64 mm&phgr;, a temperature of 290° C. and a filtration rate of 33.3 g/min.
摘要翻译： 将含有小于70摩尔％的重复单元由对苯二甲酸乙二醇酯，对苯二甲酸丁二醇酯或萘二甲酸乙二醇酯单元组成的聚酯（B）进行表面改性的含有平均粒度为0.03-1.8μm的微粒的聚酯组合物 聚酯（A），其至少70摩尔％的重复单元由对苯二甲酸乙二醇酯，对苯二甲酸丁二醇酯或萘二甲酸乙二醇酯单元组成。 使用内径为64mmφ，温度290℃，过滤速率为33.3g的双层2400目丝网过滤器过滤时，组合物的过滤压力增加率不大于10kg / cm 2 /分钟
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公开(公告)号：US6100369A
公开(公告)日：2000-08-08
申请号：US147426
申请日：1998-12-21
CPC分类号： C08G63/78 , Y02P20/582
摘要： A method for continuously producing a polyester by continuously melt-polymerizing a raw material consisting of a dicarboxylic acid component composed of mainly an aromatic dicarboxylic acid and containing an alicyclic dicarboxylic acid or an aliphatic dicarboxylic acid, or their ester-forming derivatives with a diol component, characterized in that said diol component as a distillate in the polycondensation reaction, including an adhering material, is condensed, said adhering material is separated centrifugally, and then the residual diol component, after distillation, is supplied to an esterification reaction or an ester interchange reaction.
摘要翻译： PCT No.PCT / JP98 / 01977 Sec。 371 1998年12月21日第 102（e）日期1998年12月21日PCT提交1998年4月30日PCT公布。 公开号WO98 / 50448 日期：1998年11月12日一种连续熔融聚合由主要由芳族二羧酸构成的含有脂肪族二羧酸或脂肪族二羧酸的二羧酸成分的原料或其酯形成物连续生产聚酯的方法 具有二醇成分的衍生物，其特征在于，在缩聚反应中作为馏出物的二醇成分（包括粘附材料）被冷凝，所述粘附材料离心分离，然后将残余的二醇组分在蒸馏后提供到酯化反应 反应或酯交换反应。
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