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    • 5. 发明授权
    • Process for preparing polysiloxazane compositions and the products
formed thereby
    • 制备聚硅氮烷组合物的方法和由此形成的产品
    • US5010158A
    • 1991-04-23
    • US289645
    • 1988-12-23
    • Christian ColombierJean-Pierre Cuer
    • Christian ColombierJean-Pierre Cuer
    • C04B35/571C04B35/589C08G77/48C08G77/54
    • C08G77/54C04B35/571C04B35/589
    • A process for the preparation of novel polysiloxazane compositions which comprises reacting at least one halosilane having the formula (R.sub.1).sub.a (R.sub.2).sub.b Si(Y).sub.4-(a+b) with at least one hydrazine having the formula NHR.sub.3 -NHR.sub.4 and water, wherein R.sub.1 and R.sub.2 are a hydrogen atom or a methyl, ethyl, vinyl or phenyl radical; R.sub.3 and R.sub.4 are hydrogen atoms, Y is a halogen atom and (a+b) is an integer between 0 and 3 and preferably 2. Polysiloxazane polymer compositions formed with polysiloxazanes prepared by the process described above comprise units of formula: ##STR1## combined with units of formula: ##STR2## and, if desired, units of formula: ##STR3## and, if desired, with units of formula: ##STR4## wherein radicals R.sub.1, R.sub.2, R.sub.3 and R.sub.4, which may be identical or different, may denote a hydrogen atom, a saturated or unsaturated aliphatic hydrocarbon radical or a mono- or polycyclic aryl, alkylaryl or arylalkyl radical, and wherein these radicals have a total molecular mass greater than 350.
    • 一种制备新型聚硅氮烷组合物的方法,其包括使至少一种具有式(R1)a(R2)bSi(Y)4-(a + b)的卤代硅烷与至少一种具有式NHR 3 -NHR 4的肼反应,和 水,其中R1和R2是氢原子或甲基,乙基,乙烯基或苯基; R3和R4是氢原子,Y是卤素原子,(a + b)是0-3之间的整数,优选为2.通过上述方法制备的用聚硅氧氮烷形成的聚硅氧烷聚合物组合物包含下式的单元: (II)的单元,如果需要,可以使用下式的单元:如果需要,可以使用下式的单元:其中基团R 1,R 2 可以相同或不同的R 3和R 4可以表示氢原子,饱和或不饱和脂族烃基或单环或多环芳基,烷基芳基或芳基烷基,并且其中这些基团的总分子量大于350 。