申请人:Wacker-Chemie GmbH
公开号:US05011962A1
公开(公告)日:1991-04-30
Organosiloxanes (1) of the general formula R.sup.1.sub.4-n Si(OSiR.sub.3).sub.n, in which R is the same or different and represents a hydrogen atom or a monovalent hydrocarbon radical having from 1 to 18 carbon atom(s) per radical or a substituted monovalent hydrocarbon radical having from 1 to 18 carbon atom(s) per radical, R.sup.1 represents R or a chlorine atom, and n is 3 or 4, are prepared by reacting organodisiloxanes (2) of the general formula (R.sub.3 Si).sub.2 O, with chlorosilanes (3) of the general formula R.sub.4-n SiCl.sub.n, in which R and n are the same as above, in the presence of phosphonitrile chlorides (4) and cocatalysts (5), in which the cocatalysts (5) are used concomitantly with the phosphonitrile chlorides (4) and are selected from the group consisting of amides of the general formula X--C(O)--R.sup.2, in which R.sup.2 is the same or different and represents a hydrogen atom or a monovalent hydrocarbon radical having from 1 to 8 carbon atom(s) per radical or a substituted monovalent hydrocarbon radical having from 1 to 8 carbon atom(s) per radical, and X reresents a radical of the formula R.sup.2.sub.2 N- or ##STR1## where R.sup.2 is the same as above, R.sup.3 represents a divalent hydrocarbon radical having from 5 to 7 carbon atoms per radical, urea or urea derivatives of the general formula X--C(O)--X, where X is the same as above and cyanuric acid.
一般式为R.sup.1.sub.4-n Si(OSiR.sub.3).sub.n的Organosiloxanes(1),其中R相同或不同,代表一个具有1到18个碳原子的单价碳氢基团或具有1到18个碳原子的取代单价碳氢基团的氢原子,R.sup.1代表R或氯原子,n为3或4,通过将一般式为(R.sub.3 Si).sub.2 O的organodisiloxanes(2)与一般式为R.sub.4-n SiCl.sub.n的chlorosilanes(3)在磷腈氯化物(4)和共催化剂(5)的存在下反应制备而成。其中,共催化剂(5)与磷腈氯化物(4)同时使用,并从以下群组中选择,该群组由一般式为X--C(O)--R.sup.2的酰胺组成,其中R.sup.2相同或不同,代表具有1到8个碳原子的单价碳氢基团或具有1到8个碳原子的取代单价碳氢基团,X代表式R.sup.2.sub.2 N-或##STR1##的基团,其中R.sup.2与上述相同,R.sup.3代表具有5到7个碳原子的二价碳氢基团,脲或一般式为X--C(O)--X的脲衍生物,其中X与上述相同,以及三聚氰酸。