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    • 4. 发明授权
    • Method of polycarbonate preparation by solid state polymerization
    • 通过固态聚合制备聚碳酸酯的方法
    • US06518391B1
    • 2003-02-11
    • US09911505
    • 2001-07-24
    • Patrick Joseph McCloskeyJames DayPaul Michael Smigelski, Jr.Timothy Brydon Burnell
    • Patrick Joseph McCloskeyJames DayPaul Michael Smigelski, Jr.Timothy Brydon Burnell
    • C08G6400
    • C08G64/307C08G64/06
    • Solid state polymerization of partially crystalline polycarbonate oligomers bearing ester-substituted terminal groups occurs at useful reaction rates despite their high level of endcapping. Partially crystalline polycarbonate oligomers having ester substituted terminal groups may be obtained in a single step by reaction of an ester substituted diaryl carbonate such as bis-methyl salicyl carbonate with a dihydroxy aromatic compound such as bisphenol A in the presence of a transesterification catalyst such as sodium hydroxide. Alternatively, amorphous oligomeric polycarbonates incorporating ester substituted endgroups may be obtained through careful control of the melt reaction conditions. The amorphous oligomeric polycarbonates are crystallized upon exposure to solvent vapor and subsequently undergo solid state polymerization at synthetically useful reaction rates.
    • 带有酯取代的端基的部分结晶的聚碳酸酯低聚物的固态聚合以有效的反应速率发生,尽管它们具有高水平的封端。 具有酯取代的末端基的部分结晶的聚碳酸酯低聚物可以通过酯交换催化剂如钠的存在下,酯取代的碳酸二碳酸酯如碳酸双甲基酯与二羟基芳族化合物如双酚A的反应在一个步骤中获得 氢氧化物。 或者,可以通过仔细控制熔融反应条件来获得引入酯取代的端基的无定形低聚聚碳酸酯。 无定形低聚聚碳酸酯在暴露于溶剂蒸气下结晶,随后在合成有用的反应速率下进行固态聚合。
    • 8. 发明授权
    • Solventless preparation of ester-substituted diaryl carbonates
    • 酯取代的碳酸二芳基酯的无溶剂制备
    • US06891015B2
    • 2005-05-10
    • US10216512
    • 2002-08-12
    • Timothy Brydon BurnellPatrick Joseph McCloskeyGanesh KailasamJames Anthony Cella
    • Timothy Brydon BurnellPatrick Joseph McCloskeyGanesh KailasamJames Anthony Cella
    • C07B61/00C07C68/02C07C68/08C07C69/96C08G64/00
    • C07C68/02C07C69/96
    • High yields of ester-substituted diary carbonates such as bis-methyl salicyl carbonate were obtained by the condensation of ester-substituted phenols with phosgene in the presence of a phase transfer catalyst (PTC) and optionally a tertiary amine catalyst in a solvent free reaction system comprising an aqueous phase held at a pH of 8.3 or higher. The optimized conditions of the present invention use an excess of ester-substituted phenol relative to phosgene and high conversion of phosgene to ester-substituted diaryl carbonate is observed. The product ester-substituted diaryl carbonate may be conveniently isolated as a solid by filtration or as a liquid in which the excess ester-substituted phenols serves as solvent. The method represents an attractive route for the manufacture of bis methyl salicyl carbonate and ester-substituted diaryl carbonates generally. The ester-substituted diaryl carbonates are useful for the preparation and modification of polycarbonates.
    • 通过在相转移催化剂(PTC)和任选的叔胺催化剂存在下,在无溶剂反应体系中,酯取代的酚与光气的缩合得到高收率的酯取代的二元碳酸酯,例如碳酸双甲基水杨酸酯 包含保持在8.3或更高的pH的水相。 本发明的优化条件相对于光气使用过量的酯取代的苯酚,观察到光气转化为酯取代的碳酸二芳基酯的高转化率。 产物酯取代的碳酸二芳基酯可以通过过滤或作为其中过量的酯取代的酚用作溶剂的液体方便地分离为固体。 该方法通常用于制造碳酸双甲基水杨酸酯和酯取代的二芳基碳酸酯的有吸引力的途径。 酯取代的碳酸二芳基酯可用于聚碳酸酯的制备和改性。
    • 9. 发明授权
    • Solventless preparation of ester-substituted diaryl carbonates
    • 酯取代的碳酸二芳基酯的无溶剂制备
    • US06469192B1
    • 2002-10-22
    • US09911527
    • 2001-07-24
    • Timothy Brydon BurnellPatrick Joseph McCloskeyGanesh KailasamJames Anthony Cella
    • Timothy Brydon BurnellPatrick Joseph McCloskeyGanesh KailasamJames Anthony Cella
    • C07C6996
    • C07C68/02C07C69/96
    • High yields of ester-substituted diary carbonates such as bis-methyl salicyl carbonate were obtained by the condensation of ester-substituted phenols with phosgene in the presence of a phase transfer catalyst (PTC) and optionally a tertiary amine catalyst in a solvent free reaction system comprising an aqueous phase held at a pH of 8.3 or higher. The optimized conditions of the present invention use an excess of ester-substituted phenol relative to phosgene and high conversion of phosgene to ester-substituted diaryl carbonate is observed. The product ester-substituted diaryl carbonate may be conveniently isolated as a solid by filtration or as a liquid in which the excess ester-substituted phenols serves as solvent. The method represents an attractive route for the manufacture of bis methyl salicyl carbonate and ester-substituted diaryl carbonates generally.
    • 通过在相转移催化剂(PTC)和任选的叔胺催化剂存在下,在无溶剂反应体系中,酯取代的酚与光气的缩合得到高收率的酯取代的二元碳酸酯,例如碳酸双甲基水杨酸酯 包含保持在8.3或更高的pH的水相。 本发明的优化条件相对于光气使用过量的酯取代的苯酚,观察到光气转化为酯取代的碳酸二芳基酯的高转化率。 产物酯取代的碳酸二芳基酯可以通过过滤或作为其中过量的酯取代的酚用作溶剂的液体方便地分离为固体。 该方法通常用于制造碳酸双甲基水杨酸酯和酯取代的二芳基碳酸酯的有吸引力的途径。