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公开(公告)号：US5874515A
公开(公告)日：1999-02-23
申请号：US997144
申请日：1997-12-23
申请人： Xiaoyan Huang , Ligia Dominguez
发明人： Xiaoyan Huang , Ligia Dominguez
IPC分类号： C08G63/183 , C08G63/78 , C08G63/80 , C08G63/85 , C08G63/00
CPC分类号： C08G63/78 , C08G63/183 , C08G63/80 , C08G63/85
摘要： There is disclosed a process for reducing the number of gels generated in polyethylene terephthalate (PET) resin. Gels are crosslinked polymers created by thermal and thermo-oxidative degradation induced during polymer production. The instant process comprises the addition of primary and secondary antioxidants prior to the PET polycondensation reaction in order to reduce the amount of thermal degradation which occurs. The polyethylene terephthalate produced by this process formed approximately 25 to 90% fewer gels while maintaining physical properties suitable for use in fiber, film, and molding applications.
摘要翻译： 公开了减少聚对苯二甲酸乙二醇酯（PET）树脂中产生的凝胶数量的方法。 凝胶是在聚合物生产过程中引起的热和热氧化降解产生的交联聚合物。 本方法包括在PET缩聚反应之前加入一级和二级抗氧化剂，以减少发生的热降解量。 通过该方法制备的聚对苯二甲酸乙二醇酯形成约25至90％的凝胶，同时保持适用于纤维，膜和模塑应用的物理性能。
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公开(公告)号：US5874517A
公开(公告)日：1999-02-23
申请号：US997402
申请日：1997-12-23
申请人： Xiaoyan Huang , Ligia Dominguez
发明人： Xiaoyan Huang , Ligia Dominguez
CPC分类号： C08G63/78 , C08K5/005 , C08G63/183 , C08G63/85 , C08G63/86
摘要： There is disclosed a process for reducing the amount of acetaldehyde generated when polyethylene terephthalate (PET) chip is subjected to high temperatures in order to render the PET chip suitable for making food containers, particularly beverage bottles. This process comprises the addition of primary and secondary antioxidants either prior to or after the PET polycondensation reaction in order to reduce the amount of regenerated acetaldehyde produced by the polymer. The polyethylene terephthalate produced by this process reduces regenerated acetaldehyde by at least 25% in comparison to control resin produced without antioxidants, while maintaining suitable color for use as clear glass replacement. There is also disclosed a process for molding a PET preform wherein the polymer prepared as described above is melted, formed into the desired preform shape, and solidified by cooling. This preform can then be reheated above its glass transition temperature and molded into the desired container shape.
摘要翻译： 公开了当聚对苯二甲酸乙二醇酯（PET）芯片经受高温时产生的乙醛量减少以使PET芯片适合于制造食品容器，特别是饮料瓶的方法。 该方法包括在PET缩聚反应之前或之后添加一级和二级抗氧化剂，以减少聚合物产生的再生乙醛的量。 通过该方法制备的聚对苯二甲酸乙二醇酯与没有抗氧化剂的对照树脂相比，将再生乙醛减少至少25％，同时保持合适的颜色用作透明玻璃替代物。 还公开了一种用于模塑PET预成型件的方法，其中将如上所述制备的聚合物熔化，形成所需的预制件形状，并通过冷却固化。 然后可以将该预成型件重新加热到其玻璃化转变温度以上并模制成所需的容器形状。
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公开(公告)号：US5283316A
公开(公告)日：1994-02-01
申请号：US893908
申请日：1992-06-04
CPC分类号： C08G73/0273 , C08G73/02 , C08G73/0226 , G02B1/04
摘要： The present invention provides a process for the production of polymers with an optical position in diagram where refraction index n.sub.D is plotted against optical dispension v.sub.D expedient for an optical use by metathetic counterion exchange, wherein, in a polymer of the general formula: ##STR1## R.sub.1 and R.sub.2, which can be the same or different, are divalent organic radicals, R.sub.3 and R.sub.4, which can be the same or different, are monovalent organic radicals, n is a whole number greater than 2 and y is 0 or 1. R.sub.1, R.sub.2, R.sub.3, R.sub.4, y and n are so chosen that together they form a polymeric basic structure which promotes glass formation and prevents crystallisation, and X.sup.- is a halogen atom. The halogen ion is replaced by an equivalent of a mono- or polyvalent organic or inorganic counterion different from the halogen ion and suitable for the adjustment of the desired solid body properties.Because of their outstanding optical properties (high refractive index in conjunction with low optical dispersion), these polymers are very suitable for a great variety of uses in optics, for example for optical construction parts, such as Fresnel lenses and lightwave conductors, and as optical coatings.
摘要翻译： 本发明提供一种制备具有光学位置的聚合物的方法，其中折射指数nD相对于用于通过可变抗衡离子交换的光学用途的光学分布vD有利地绘制，其中在通式的聚合物中：（* CHEMICAL 结构*）（I）可以相同或不同的R 1和R 2是二价有机基团，可以相同或不同的R 3和R 4是一价有机基团，n的整数大于2，y 是0或1.选择R1，R2，R3，R4，y和n，以便它们一起形成促进玻璃形成并防止结晶的聚合物基本结构，并且X-是卤素原子。 卤素离子被等价于与卤素离子不同的单价或多价有机或无机抗衡离子所代替，适合调整所需的固体物性。 由于其优异的光学性能（高折射率结合低光学色散），这些聚合物非常适用于光学领域的各种用途，例如用于诸如菲涅耳透镜和光波导体的光学构造部件，以及作为光学 涂料。
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公开(公告)号：US06793083B2
公开(公告)日：2004-09-21
申请号：US10653364
申请日：2003-09-02
申请人： Rehka V. Kulkarni , Ligia Dominguez
发明人： Rehka V. Kulkarni , Ligia Dominguez
IPC分类号： B65D2300
CPC分类号： C08G63/87 , C08G63/183 , C08G63/826 , Y10T428/1352
摘要： A preblended additive composition and process for the preparation of polyester resins useful in the manufacture of plastic containers such as bottles is disclosed. The additive composition includes a cobalt-containing compound that is preblended with a phosphorous compound. The polyester resin, e.g., a PET resin, may be prepared by reacting ethylene glycol with dimethyl terephthalate (DMT) or terephthalic acid (TA) in an esterification reaction. The additive composition may be prepared by quickly dumping the phosphorus compound into the cobalt compound such as cobalt acetate, and the resulting composition is added to the reactor vessel before the polycondensation reaction. On the other hand, the additive composition may be prepared by slowly dumping the phosphorus compound into the cobalt compound over a period of at least 5 minutes. Such preblending substantially eliminates any yellow or blue color, or haze in the product article.
摘要翻译： 公开了一种用于制备塑料容器如瓶子的聚酯树脂的预混合添加剂组合物和方法。 添加剂组合物包括与磷化合物预混合的含钴化合物。 聚酯树脂例如PET树脂可以通过在酯化反应中使乙二醇与对苯二甲酸二甲酯（DMT）或对苯二甲酸（TA）反应来制备。 添加剂组合物可以通过将磷化合物快速倾倒到钴化合物如乙酸钴中来制备，并且在缩聚反应之前将所得组合物加入反应器容器中。 另一方面，添加剂组合物可以通过在至少5分钟的时间内缓慢地将磷化合物倾倒到钴化合物中来制备。 这种预混合基本上消除了产品制品中的任何黄色或蓝色或雾度。
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公开(公告)号：US06632917B1
公开(公告)日：2003-10-14
申请号：US09587064
申请日：2000-06-02
申请人： Rehka V. Kulkarni , Ligia Dominguez
发明人： Rehka V. Kulkarni , Ligia Dominguez
IPC分类号： C08G6378
CPC分类号： C08G63/87 , C08G63/183 , C08G63/826 , Y10T428/1352
摘要： A preblended additive composition and process for the preparation of polyester resins useful in the manufacture of plastic containers such as bottles is disclosed. The additive composition includes a cobalt-containing compound that is preblended with a phosphorous compound. The polyester resin, e.g., a PET resin, may be prepared by reacting ethylene glycol with dimethyl terephthalate (DMT) or terephthalic acid (TA) in an esterification reaction. The additive composition may be prepared by quickly dumping the phosphorus compound into the cobalt compound such as cobalt acetate, and the resulting composition is added to the reactor vessel before the polycondensation reaction. On the other hand, the additive composition may be prepared by slowly dumping the phosphorus compound into the cobalt compound over a period of at least 5 minutes. Such preblending substantially eliminates any yellow or blue color, or haze in the product article.
摘要翻译： 公开了一种用于制备塑料容器如瓶子的聚酯树脂的预混合添加剂组合物和方法。 添加剂组合物包括与磷化合物预混合的含钴化合物。 聚酯树脂例如PET树脂可以通过在酯化反应中使乙二醇与对苯二甲酸二甲酯（DMT）或对苯二甲酸（TA）反应来制备。 添加剂组合物可以通过将磷化合物快速倾倒到钴化合物如乙酸钴中来制备，并且在缩聚反应之前将所得组合物加入反应器容器中。 另一方面，添加剂组合物可以通过在至少5分钟的时间内缓慢地将磷化合物倾倒到钴化合物中来制备。 这种预混合基本上消除了产品制品中的任何黄色或蓝色或雾度
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