Prodn. of boron-contg. polysiloxane, useful in prodn. of ceramics - by reacting tris-di:chloro:silyl-ethyl-borane(s) with water in presence of organic base

摘要

Prodn. of boron-contg. polysiloxanes (II) comprises reaction of tris-silyl-borane(s) of formula B(-C2H4-SiCl2X)3 (I) with water in the presence of organic base (the gp. -C2H4- is -CH2-CH2- or -CHMe-); and X is Cl or 1-4C aliphatic residue. R = 1-4C aliphatic residue; and a + b = 1. The B-contg. polysiloxanes of formula (II); obtd. by the above process are also claimed. At least equimol. amts. of water are pref. used., and cpd. (I) is reacted as a soln. in organic solvent; the reactants are mixed at -10 to +10 deg. C and the mixt. is then heated to 10-200 deg. C. USE/ADVANTAGE - (II) are useful for the prodn. of B- and Si-contg. ceramics with excellent adhesion, hardness and surface quality, which are useful esp. for the surface treatment of machine components which are subjected to mechanical and chemical stress.