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21 条记录 (耗时 0.027 秒)

    Method of preparing modified polyester bottle resins
    8.
    发明授权
    Method of preparing modified polyester bottle resins 失效
    改性聚酯瓶树脂的制备方法

    公开(公告)号：US06335422B2

    公开(公告)日：2002-01-01

    申请号：US09851240

    申请日：2001-05-08

    申请人： Robert Joseph Schiavone

    发明人： Robert Joseph Schiavone

    IPC分类号： C08G6366

    CPC分类号： C08G63/80 ,  Y10T428/1352 ,  Y10T428/1397

    摘要： The present invention is a method of preparing a high molecular weight copolyester bottle resin that has excellent melt processing characteristics. The method includes the steps of reacting a diacid or diester component and a diol component to form modified polyethylene terephthalate, wherein diol component is present in excess of stoichiometric proportions. Together, the diacid or diester component and the diol component must include at least 7 percent comonomer. The remainder of the diacid component is terephthalic acid or dimethyl terephthalate and the remainder of the diol component is ethylene glycol. The modified polyethylene terephthalate is copolymerized in the melt phase to an intrinsic viscosity of between about 0.25 dl/g and 0.40 dl/g to thereby form a copolyester prepolymer. Thereafter the copolyester prepolymer is polymerized in the solid phase to form a high molecular weight bottle resin that has an intrinsic viscosity of at least about 0.70 dl/g, and a solid phase density of less than 1.413 g/cc.

    摘要翻译： 本发明是制备具有优异的熔融加工特性的高分子量共聚酯瓶树脂的方法。 该方法包括使二酸或二酯组分和二醇组分反应形成改性聚对苯二甲酸乙二醇酯的步骤，其中二醇组分以超过化学计量比的量存在。 一起，二酸或二酯组分和二醇组分必须包含至少7％的共聚单体。 二酸组分的其余部分是对苯二甲酸或对苯二甲酸二甲酯，剩余的二醇组分是乙二醇。 改性聚对苯二甲酸乙二醇酯在熔融相中共聚至约0.25dl / g至0.40dl / g之间的特性粘度，从而形成共聚酯预聚物。 此后，共聚酯预聚物在固相中聚合以形成特性粘度为至少约0.70dl / g，固相密度小于1.413g / cc的高分子量瓶型树脂。