| abstract |
General formula A method of preparing organopolysiloxanes by contacting at least one organosilicon compound having at least one unit of with a phosphonitrile halide of Formula AB Wherein R 0 is a hydrogen atom, a hydroxyl group, a C 1-18 hydrocarbon group, a substituted hydrocarbon group or a hydrocarbonoxy group, a is a value from 0 to 4, and A is a general formula [X (PX 2 = Phosphonitrile halide cation of N) nPX 3 ] + , X is a halide atom, n is 1 to 8, B is an anion derived from a Lewis acid containing no P atoms, for example, to be. The method is particularly useful for the coupling of silanol end blocked siloxanes. |