PROCESS FOR CONTINUOUS PREPARATION OF A PREPOLYMER BASED ON PHENOLIC RESINS, OXAZOLINES AND EPOXIDES
    1.
    发明申请
    PROCESS FOR CONTINUOUS PREPARATION OF A PREPOLYMER BASED ON PHENOLIC RESINS, OXAZOLINES AND EPOXIDES 有权
    用于连续制备基于酚醛树脂,氧化腈和环氧化物的预聚物的方法

    公开(公告)号:US20120121812A1

    公开(公告)日:2012-05-17

    申请号:US13297906

    申请日:2011-11-16

    摘要: Process for the continuous preparation of prepolymers based on phenolic resin, an oxazoline component and an epoxide in the presence of a catalyst, including supplying the phenolic resin and the oxazoline component to an extruder in a stream A; a Lewis adduct of boron trifluoride or of aluminium trichloride, or arylsulphonic acids or alkylsulphonic acids, or latent arylsulphonic acids or latent alkylsulphonic acids, in a stream B, and the epoxide in a stream C, the infeed of stream A being situated, as seen in extrusion direction, before the infeed of stream C, these reactants are mixed at a reaction temperature of 120 to 200° C. with a residence time in the extruder of 3 seconds to 15 minutes, and then the product discharge of the extruder is cooled to a temperature of less than 45° C. within from 30 to 60 seconds.

    摘要翻译: 在催化剂存在下连续制备基于酚醛树脂,恶唑啉组分和环氧化物的预聚物的方法,包括将酚醛树脂和恶唑啉组分供给流A中的挤出机; 流B中的三氟化硼或三氯化铝或芳基磺酸或烷基磺酸或潜在芳基磺酸或潜在烷基磺酸的路易斯加合物和流C中的环氧化物,流A所在的进料如所见 在挤出方向上,在流C进料之前,将这些反应物在120〜200℃的反应温度下在挤出机中的停留时间混合3秒至15分钟,然后将挤出机的产物排出物冷却 在30至60秒内温度低于45℃。

    Process for the preparation of cytosines
    2.
    发明授权
    Process for the preparation of cytosines 失效
    胞嘧啶的制备方法

    公开(公告)号:US5026852A

    公开(公告)日:1991-06-25

    申请号:US460424

    申请日:1990-01-03

    IPC分类号: C07D239/47 C07D239/46

    CPC分类号: C07D239/47

    摘要: Cytosines which may optionally be substituted in the 5 position are prepared by a simplified process in which urea is reacted with an alcoholate and an alkoxy-acrylonitrile or dialkoxy-propionitrile in a sparsely water-miscible organic solvent which is inert under the reaction conditions. The use of such a solvent makes it possible to react the mentioned reactants in simple fashion without isolation of an intermediate stage, and to reuse the organic solvent without a separate purification.

    摘要翻译: 可以任选地被取代在5位的胞嘧啶通过简单的方法制备,其中脲与醇化物和烷氧基 - 丙烯腈或二烷氧基 - 丙腈在与反应条件下是惰性的稀疏水混溶性有机溶剂中反应。 使用这种溶剂使得可以以简单的方式使所述反应物反应而不分离中间阶段,并且在不进行单独纯化的情况下再利用有机溶剂。