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    • 1. 发明授权
    • Processes for the production of polycarbonate
    • 聚碳酸酯生产工艺
    • US06288203B1
    • 2001-09-11
    • US09068561
    • 1999-05-05
    • Akihiro ShishikuraSeiji Takahashi
    • Akihiro ShishikuraSeiji Takahashi
    • C08G6400
    • C08G64/307C08G64/20
    • Processes for producing polycarbonate by solid phase polymerization which simplify the crytallization to be conducted prior to the solid phase polymerization to thereby permit further shortening in the treatment time. A process for producing polycarbonate is characterized in that an amorphous polycarbonate prepolymer prepared by transesterification of aromatic dihydroxy compound with a diester of carbonic acid is prepolymerized in a solid phase under an atmosphere containing gaseous swollen solvent while the prepolymer is kept in a fluid state. Another process for producing polycarbonate is characterized in that a mixture comprising an amorphous polycarbonate prepolymer prepared by transesterification of an aromatic dihydroxy compound with a diester of carbonic acid and a polycarbonate prepolymer which has undergone crystallization is prepolymerized in a solid phase under an atmosphere containing a gaseous swollen solvent.
    • 通过固相聚合生产聚碳酸酯的方法,其简化在固相聚合之前进行的凝固,从而允许在处理时间内进一步缩短。 制备聚碳酸酯的方法的特征在于,通过芳香族二羟基化合物与碳酸二酯的酯交换反应制备的无定形聚碳酸酯预聚物在含有气体溶胀溶剂的气氛下在固相中预聚合,同时将预聚物保持在流体状态。 制备聚碳酸酯的另一种方法的特征在于,通过将芳族二羟基化合物与碳酸二酯和已经经过结晶的聚碳酸酯预聚物的酯交换反应制备的包含无定形聚碳酸酯预聚物的混合物在固相中在含有气态 溶胀溶剂。
    • 5. 发明授权
    • Process for producing polycarbonate
    • 生产聚碳酸酯的方法
    • US5922826A
    • 1999-07-13
    • US875402
    • 1997-07-31
    • Shigeki KuzeKenji TanakaKouichi SugaYoshikatsu SeinoAkihiro ShishikuraNoriyuki Kunishi
    • Shigeki KuzeKenji TanakaKouichi SugaYoshikatsu SeinoAkihiro ShishikuraNoriyuki Kunishi
    • C08G64/22C08G64/24C08G64/30C08G64/00
    • C08G64/307C08G64/22C08G64/24
    • There are disclosed a process for producing a polycarbonate through transesterification which comprises using, as a polymerization catalyst, (1) a combination of a nitrogen-containing organic basic compound and a quaternary phosphonium salt, (2) a tetraarylphosphonium salt having a specific chemical structure, or (3) a quaternary phosphonium salt having a specific chemical structure and containing a branched alkyl group; and a process for producing a polycarbonate which comprises the steps of preparing a polycarbonate prepoplymer by preliminary polymerization and thereafter polymerizing the resultant prepolymer in a state of a solid phase by the use of a quaternary phosphonium salt as a catalyst.By using any of these processes it is made possible to produce, in extremely high efficiency, a high-quality polycarbonate being excellent in appearance, heat resistance, hydrolysis resistance and the like.
    • PCT No.PCT / JP96 / 00178 Sec。 371日期1997年7月31日 102(e)日期1997年7月31日PCT提交1996年1月31日PCT公布。 第WO96 / 23832号公报 日期:1996年8月8日公开了通过酯交换反应生产聚碳酸酯的方法,该方法包括使用(1)含氮有机碱性化合物和季鏻盐的组合作为聚合催化剂,(2)四芳基鏻盐 具有特定的化学结构,或(3)具有特定化学结构并含有支链烷基的季鏻盐; 和聚碳酸酯的制造方法,其特征在于,包括以下步骤:通过预聚合制备聚碳酸酯预聚物,然后通过使用季鏻盐作为催化剂,使所得预聚物以固相的状态聚合。 通过使用任何这些方法,可以以极高的效率制造出外观,耐热性,耐水解性等优异的高品质聚碳酸酯。