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    • 6. 发明授权
    • Method of preparing polycarbonate
    • 聚碳酸酯的制备方法
    • US07498400B2
    • 2009-03-03
    • US11427885
    • 2006-06-30
    • Bernd JansenJan Henk KampsEdward KungPatrick Joseph McCloskeyPaul Michael Smigelski, Jr.
    • Bernd JansenJan Henk KampsEdward KungPatrick Joseph McCloskeyPaul Michael Smigelski, Jr.
    • C08G64/00C08G63/02
    • C08G64/14C08G64/307
    • Polycarbonates incorporating terminal carbonate groups derived from ester-substituted activated carbonates in a transesterification process have unfavorable properties with respect to color, hydrolytic stability and thermal stability, particularly when the polycarbonate containing such end groups is molded. The number of activated carbonate end groups formed during the melt transesterification formation of polycarbonate can be reduced by reacting a dihydroxy compound with an activated diaryl carbonate in the presence of an esterification catalyst to produce a polycarbonate, in the presence of a monohydroxy chainstopper such as para-cumyl phenol in an amount that results in 35 to 65 mol % of the end groups being derived from the monohydroxy chainstopper. Suitably, the reactants are provided such that the molar ratio of activated diaryl carbonate to the total of dihydroxy compound plus ½ the chainstopping reagent that is less than 1.
    • 在酯交换方法中,衍生自酯取代的活性碳酸酯的末端碳酸酯基团的聚碳酸酯在颜色,水解稳定性和热稳定性方面具有不利的性质,特别是当含有这样的端基的聚碳酸酯被成型时。 在聚碳酸酯的熔融酯交换形成期间形成的活化碳酸酯端基的数量可以通过在酯化催化剂的存在下使二羟基化合物与活化的碳酸二芳基酯反应来制备聚碳酸酯,在单羟基链断裂剂例如对 - 辛基苯酚,其量导致35-65mol%端基衍生自单羟基链断裂剂。 适当地,提供反应物使得活化的碳酸二芳基酯与二羟基化合物的总和加上1/2的阻滞剂的摩尔比小于1。
    • 7. 发明申请
    • THERMOPLASTIC POLYCARBONATE COMPOSITIONS WITH IMPROVED CHEMICAL AND SCRATCH RESISTANCE
    • 具有改善化学和电阻率的热塑性聚碳酸酯组合物
    • US20080033108A1
    • 2008-02-07
    • US11461466
    • 2006-08-01
    • Edward KungWilhelmus Johannes Daniel Steendam
    • Edward KungWilhelmus Johannes Daniel Steendam
    • C08L51/00
    • C08L55/02C08L25/12C08L33/12C08L69/00C08L2666/14C08L2666/04C08L2666/02
    • Disclosed is a thermoplastic composition comprising a polycarbonate terpolymer comprising structures derived from structures (I), (TI) and (III), wherein (I) is a dihydroxy compound having the structure (A): wherein n is 0 to 4 and Rf is independently a halogen atom, a C1-10 hydrocarbon group, or a C1-10 halogen substituted hydrocarbon group; (II) comprises a second dihydroxy compound derived from Formula (A) and different from (I) and wherein n and Rf are as previously defined; and (III) a third dihydroxy compound not derived from Formula (A), wherein the sum of the mol percent of all of structures (I) and (II) is greater than 45% relative to the sum of the molar amounts of all of structures (I), (II) and (III) in the polycarbonate terpolymer and wherein said polycarbonate terpolymer is amorphous; an impact modifier; and an ungrafted rigid copolymer. The thermoplastic composition has improved chemical resistance and scratch resistance.
    • 公开了一种包含聚碳酸酯三元共聚物的热塑性组合物,其包含衍生自结构(I),(TI)和(III)的结构,其中(I)是具有结构(A)的二羟基化合物:其中n为0至4, 卤素取代的烃基独立地为卤素原子,C 1-10烃基或C 1-10烷基卤素取代的烃基; (II)包含衍生自式(A)和不同于(I)的第二二羟基化合物,其中n和R f如前所定义; 和(III)不是衍生自式(A)的第三种二羟基化合物,其中所有结构(I)和(II)的所有结构(I)和(II)的摩尔百分比之和相对于全部 聚碳酸酯三元共聚物中的结构(I),(II)和(III),并且其中所述聚碳酸酯三元共聚物是无定形的; 抗冲改性剂 和未接枝的刚性共聚物。 热塑性组合物具有改善的耐化学性和耐擦伤性。