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    • 1. 发明申请
    • AN IMPROVED PROCESS FOR THE PRODUCTION OF SLOW CRYSTALLIZING POLYESTER RESIN
    • 一种改进的慢结晶聚酯树脂生产工艺
    • WO2007052294A8
    • 2007-12-21
    • PCT/IN2006000296
    • 2006-08-14
    • RELIANCE IND LTDNADKARNI VIKAS MADHUSUDANAYODHYA SRINIVASACHARYA RAMACHWADEKAR SHREERAM ASHOKJAIN ASHWIN KUMARRANE SACHIN NARAYANLIMAYE CHETAN VIJAY
    • NADKARNI VIKAS MADHUSUDANAYODHYA SRINIVASACHARYA RAMACHWADEKAR SHREERAM ASHOKJAIN ASHWIN KUMARRANE SACHIN NARAYANLIMAYE CHETAN VIJAY
    • C08G63/16
    • C08G63/80C08G63/181C08G63/199C08G63/672C08G63/78
    • Improved process for the continuous production of slow crystallizing polyester resin comprising esterification of at least one dicarboxylic acid or mono-esters thereof or di-esters thereof with at least one polyol, melt polymerizing the esterified mixture, preparing uniform crystalline hemispherical prepolymer by particle former process, adding at least one diol having tertiary or quaternary carbon atoms with pendant groups such as neopentyl glycol or 2-methyl-1,3- propanediol or any suitable diol at any stage during esterification or melt polymerization but before the particle former process; and solid state polymerizing the prepolymer to obtain high molecular weight slow crystallizing polyester. Slow crystallizing low molecular weight crystalline hemispherical prepolymer having IV of about 0.1 dl/g to about 0.45 and uniform hemispherical shape, uniform particle size, uniform crystallinity prepared by the above process and is used as precursor to prepare high molecular weight resin. Slow crystallizing high molecular weight polyester resin with an IV from about 0.5dl/g to about 1.2 dl/g having reduced melting point prepared by the above process and is used for the production of thick walled transparent preforms, large containers, films or sheets with accepted clarity.
    • 改进了用于连续生产慢结晶聚酯树脂的方法,该方法包括将至少一种二羧酸或其单酯或其二酯与至少一种多元醇酯化,将酯化混合物熔融聚合,通过颗粒形成剂方法制备均匀结晶半球形预聚物 在酯化或熔融聚合期间但在颗粒形成剂过程之前的任何阶段加入至少一种具有叔或季碳原子的二醇,其具有侧基如新戊二醇或2-甲基-1,3-丙二醇或任何合适的二醇; 并使该预聚物固态聚合以获得高分子量慢结晶聚酯。 缓慢结晶IV为约0.1dl / g至约0.45的均匀半球形,均匀粒度,均匀结晶度的低分子量结晶半球状预聚物,并用作制备高分子量树脂的前体。 用约0.5dl / g至约1.2dl / g的IV缓慢结晶高分子量聚酯树脂,通过上述方法制备具有降低的熔点并且用于制造厚壁透明预成型件,大容器,膜或片材 接受清晰。