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    • 3. 发明授权
    • Process for the preparation of sulfo-modified polyesters
    • 磺基改性聚酯的制备方法
    • US4499262A
    • 1985-02-12
    • US588168
    • 1984-03-09
    • David R. FagerburgFinley E. McFarlane
    • David R. FagerburgFinley E. McFarlane
    • C08G63/688C08G63/82C08G63/04C08G63/34
    • C08G63/82C08G63/6886
    • Disclosed is a process for preparing sulfo-modified polyesters having an inherent viscosity of about 0.3 to about 0.9 and characterized by an improved planar stretch ratio relative to a given inherent viscosity, an improved rate of acetaldehyde generation relative to a given planar stretch ratio and increased buildup of melt viscosity. The process comprises the steps of (a) reacting (1) a dicarboxylic acid component comprising at least about 85 mole % terephthalic acid and about 0.1 to about 5.0 mole % of a difunctional sulfo-monomer, and (2) a glycol component comprising at least about 85 mole % ethylene glycol, the reaction being conducted in the presence of a catalyst system comprising a titanium compound and an organic salt of an alkali metal, (2) polycondensing the reaction product of step (1) in the presence of a phosphate ester until a polymer having the desired I.V. is obtained.
    • 公开了一种制备具有约0.3至约0.9的特性粘度的磺基改性聚酯的方法,其特征在于相对于给定的特性粘度提高的平面拉伸比,提高相对于给定平面拉伸比的乙醛生成速率并增加 熔体粘度累积。 该方法包括以下步骤:(1)使包含至少约85摩尔%对苯二甲酸和约0.1至约5.0摩尔%二官能磺基单体的二羧酸组分与(2)二醇组分 该反应在包含钛化合物和碱金属的有机盐的催化剂体系的存在下进行,(2)在步骤(1)的反应产物中,在磷酸盐存在下缩聚反应 酯直到具有所需IV的聚合物 获得。