Fireproofed thermoplastic moulding masses
    5.
    发明授权
    Fireproofed thermoplastic moulding masses 失效
    防火热塑性塑料块

    公开(公告)号:US6093759A

    公开(公告)日:2000-07-25

    申请号:US171197

    申请日:1998-10-15

    摘要: Flame-retardant thermoplastic molding compositions compriseA) from 5 to 99% by weight of a thermoplastic polymer,B) from 0.1 to 50% by weight of a phosphazene of the general formula I(PN.sub.2-x H.sub.1-y).sub.z I where the numerical values of x, y and z, independently of one another, are as follows:1>x>0.051>y>0.05z>1, andC) from 0 to 70% by weight of other additives and processing aids,where the total of the percentages by weight of components A) to C) is 100%.

    摘要翻译: PCT No.PCT / EP97 / 01912 Sec。 371日期:1998年10月15日 102(e)日期1998年10月15日PCT 1997年4月17日PCT公布。 出版物WO97 / 40092 日期1997年10月30日阻燃热塑性成型组合物包含A)5至99重量%的热塑性聚合物,B)0.1至50重量%的通式I的磷腈(PN2-xH1-y) z,其中x,y和z的数值彼此独立地如下:1> x> 0.05 1> y> 0.05 z> 1,C)0至70重量%的其他添加剂和加工 助剂,其中组分A)至C)的重量百分比的总和为100%。

    Preparation of an aqueous solution of free hydroxylamine
    7.
    发明授权
    Preparation of an aqueous solution of free hydroxylamine 失效
    制备游离羟胺水溶液

    公开(公告)号:US06299734B1

    公开(公告)日:2001-10-09

    申请号:US09122099

    申请日:1998-07-24

    IPC分类号: B01D334

    CPC分类号: C01B21/1445

    摘要: An aqueous solution of free hydroxylamine is prepared by treating a hydroxylammonium salt with ammonia by the countercurrent method in a stripping column by a process in which hydroxylamine is liberated and at the same time the solution obtained is separated by distillation into an aqueous hydroxylamine solution and a salt fraction. The novel process can be carried out in a simple and gentle manner and on a large scale. The danger of decomposition is minimized owing to the low thermal load, the low concentration of hydroxylamine and the short residence time in the process.

    摘要翻译: 游离羟胺的水溶液是通过在汽提塔中通过逆流法在氨基处理羟胺而制备的,其中羟胺被释放,同时将得到的溶液通过蒸馏分离成羟胺水溶液和 盐分。 新颖的过程可以简单而温和的方式进行,大规模进行。 由于热负荷低,羟胺浓度低,并且在该过程中停留时间短,所以分解的危险被最小化。