Cyclic oligoformals in polycarbonate
    81.
    发明授权
    Cyclic oligoformals in polycarbonate 失效
    聚碳酸酯中的环状低聚异构体

    公开(公告)号:US07399820B2

    公开(公告)日:2008-07-15

    申请号:US11189198

    申请日:2005-07-26

    IPC分类号: C08G64/00

    摘要: A thermoplastic molding composition comprising (co)poly(ester)carbonate, and a cyclic oligoformal is disclosed. The composition that is characterized in its lowered water absorption and improved flowability is suitable for a variety of application including in particular optical data storage media.

    摘要翻译: 公开了包含(共)聚(酯)碳酸酯和环状低聚异构体的热塑性模塑组合物。 其特征在于其降低的吸水性和改善的流动性的组合物适用于各种应用,包括特别是光学数据存储介质。

    Transesterification process for the production of polycarbonates having a low content of volatile compounds
    82.
    发明授权
    Transesterification process for the production of polycarbonates having a low content of volatile compounds 有权
    用于生产挥发性化合物含量低的聚碳酸酯的酯交换方法

    公开(公告)号:US07279544B2

    公开(公告)日:2007-10-09

    申请号:US11002866

    申请日:2004-12-02

    IPC分类号: C08G64/00

    CPC分类号: C08G64/307

    摘要: A multi stage process for the production of polycarbonates having low monomer content is disclosed. The process entails, in sequence, (i) transesterifying in the melt at least one dihydroxyaryl compound with at least one diaryl carbonate in the presence of at least one onium catalyst to produce a polycondensate that contains monomers, (ii) introducing into the polycondensate an inhibitor in an hypostoichiometric amount in relation to the catalyst and (iii) reducing in a finishing reactor the content of monomers in said polycondensate. The polycarbonate thus produced is characterized in that it contains less than 350 ppm of diphenyl carbonate, less than 40 ppm of 2,2-bis-(4-hydroxyphenyl)propane and less than 150 ppm of phenol.

    摘要翻译: 公开了一种生产具有低单体含量的聚碳酸酯的多阶段方法。 该方法按顺序进行,(i)在至少一种鎓催化剂的存在下,使至少一种二羟基芳基化合物与至少一种碳酸二芳基酯在至少一种二羟基芳基化合物中酯交换以产生含有单体的缩聚物,(ii)将所述缩聚物引入到缩聚物中 抑制剂相对于催化剂的低化学计量量,和(iii)在精整反应器中还原所述缩聚物中单体的含量。 如此生产的聚碳酸酯的特征在于其含有少于350ppm的碳酸二苯酯,小于40ppm的2,2-双 - (4-羟基苯基)丙烷和小于150ppm的苯酚。

    Branched polyformals and copolyformals their preparation and use
    84.
    发明授权
    Branched polyformals and copolyformals their preparation and use 失效
    分支多聚体和共聚形式的制备和使用

    公开(公告)号:US07208564B2

    公开(公告)日:2007-04-24

    申请号:US10924620

    申请日:2004-08-24

    IPC分类号: C08G64/00

    CPC分类号: C08G65/40 C08L71/10

    摘要: A branched (co)polyformal is disclosed. The (co)polyformal contains structural units conforming to at least one the general formulae (1a) and (1b) wherein each of -E- and -D- independently of one another denote an aromatic radical having 6 to 40 C atoms, k is 1 to 4,000, o is 1 to 4,000, m is z/o and n is (o-z)/o, where z is 0 to o. The branched (co)polyformal is characterized by its reduced water uptake and improved hydrolytic stability. Also disclosed are processes for its preparation and use in the production of molded articles.

    摘要翻译: 公开了支链(共)聚合物。 (共)多聚甲醛含有符合至少一个通式(1a)和(1b)的结构单元,其中-E-和-D-彼此独立地表示具有6至40个C原子的芳族基团,k是 1至4,000,o为1至4,000,m为z / o,n为(盎司)/ o,其中z为0至o。 支链(共)聚甲醛的特征在于其降低的吸水率和改善的水解稳定性。 还公开了其制备和用于制造模制品的方法。

    Branched polycarbonates
    85.
    发明申请
    Branched polycarbonates 有权
    支化聚碳酸酯

    公开(公告)号:US20060094855A1

    公开(公告)日:2006-05-04

    申请号:US11263678

    申请日:2005-11-01

    IPC分类号: C08G64/00

    CPC分类号: C08G64/14

    摘要: A branched polycarbonate and processes for its preparation are disclosed. The polycarbonate contains structural units conforming to in which R1, R2, R3 and R4 mutually independently denote C1-C10 alkyl, R5, R6 and R7 mutually independently denote hydrogen or C1-C10 alkyl, or R1 and R2, and R3 and R4, with the carbon atom to which they are attached, form a C5-C10 cycloalkyl group, wherein the cycloalkyl group may be substituted.

    摘要翻译: 公开了一种支化聚碳酸酯及其制备方法。 聚碳酸酯包含与R 1,R 2,R 3和R 4相互独立地符合的结构单元 表示C 1 -C 10烷基,R 5,R 6和R 7 >相互独立地表示氢或C 1 -C 10烷基,或R 1和R 2,R 2和R 2独立地表示氢或C 1 -C 10烷基, 与它们所连接的碳原子一起形成C 5 -C 10亚烷基, 环烷基,其中环烷基可以被取代。

    Branched polyformals and copolyformals their preparation and use
    89.
    发明申请
    Branched polyformals and copolyformals their preparation and use 失效
    分支多聚体和共聚形式的制备和使用

    公开(公告)号:US20050049389A1

    公开(公告)日:2005-03-03

    申请号:US10924620

    申请日:2004-08-24

    CPC分类号: C08G65/40 C08L71/10

    摘要: A branched (co)polyformal is disclosed. The (co)polyformal contains structural units conforming to at least one the general formulae (1a) and (1b) wherein each of -E- and -D- independently of one another denote an aromatic radical having 6 to 40 C atoms, k is 1 to 4,000, o is 1 to 4,000, m is z/o and n is (o-z)/o, where z is 0 to o. The branched (co)polyformal is characterized by its reduced water uptake and improved hydrolytic stability. Also disclosed are processes for its preparation and use in the production of molded articles.

    摘要翻译: 公开了支链(共)聚合物。 (共)多聚甲醛含有符合至少一个通式(1a)和(1b)的结构单元,其中-E-和-D-彼此独立地表示具有6至40个C原子的芳族基团,k是 1至4,000,o为1至4,000,m为z / o,n为(盎司)/ o,其中z为0至o。 支链(共)聚甲醛的特征在于其降低的吸水率和改善的水解稳定性。 还公开了其制备和用于制造模制品的方法。