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    • 8. 发明授权
    • Boron/nitrogen preceramic polymers and boron nitride ceramic materials
produced therefrom
    • BORON / NITROGEN PRECERAMIC POLYMERS和BORON NITRIDE CERAMIC MATERIALS PRODUCER THEREFROM
    • US5071935A
    • 1991-12-10
    • US418193
    • 1989-10-06
    • Pierre ArdaudGerard Mignani
    • Pierre ArdaudGerard Mignani
    • C04B35/583C01B21/064C08G79/00C08G79/08D01F9/10
    • C08G79/08
    • Organometallic boron/nitrogen polymers, precursors of boron nitride, include recurring structural units of the formulae (I) and (II): ##STR1## wherein X is N-R.sup.3, Y is NR.sup.1 R.sup.2 and Z is N-R, in which R, R.sup.1, R.sup.2 and R.sup.3, which may be identical or different, are each a hydrogen atom, an optionally substituted hydrocarbon radical, or an organosilyl or hydrogenoorganosilyl radical and are prepared by reacting (a) at least one cyclic compound (compound A) containing recurring structural units of the formula (1): ##STR2## wherein A is a halogen atom and R is a hydrogen atom, an optionally substituted hydrocarbon radical, or an organosilyl or hydrogenoorganosilyl radical, with (b) at least one compound including at least one boron atom to which two halogen atoms are directly bonded (compound B), and (c) at least one compound containing at least one NH.sub.2 group compound C); the resulting organometallic polymers are facilely pyrolyzed into boron nitride ceramic materials.
    • 有机金属硼/氮聚合物,氮化硼的前体包括式(I)和(II)的重复结构单元:其中X是N-R 3,Y是NR 1 R 2,和 Z是NR,其中R,R 1,R 2和R 3可以相同或不同,各自为氢原子,任选取代的烃基或有机甲硅烷基或氢有机甲硅烷基,并且通过使(a)至少一种 含有式(1)的重复结构单元的环状化合物(化合物A):其中A是卤素原子,R是氢原子,任选取代的烃基或有机甲硅烷基或氢有机甲硅烷基,其中 (b)至少一种包含至少一个与两个卤原子直接键合的硼原子的化合物(化合物B),和(c)至少一种含有至少一个NH 2基团化合物C)的化合物; 所得到的有机金属聚合物易于热解成氮化硼陶瓷材料。