METHOD FOR PREPARING POLYORGANOSILOXANES (POS) BY POLYCONDENSATON/REDISTRIBUTION OF OLIGOSILOXANES IN THE PRESENCE OF A STRONG BASE AND STRONG BASES USED

摘要

the invention relates to the synthesis of silicone rubber by anionic polymerizationorganosiloxanes cyclic oligomers in the presence of a low superbasethe nucleophile. the aim of the invention is to provide novel catalystsoverbased, more efficient in terms of solubility in silicone.stability of performance in the hydrolysis and polymerization. in order toto achieve this goal, the invention proposes the implementation of derivatives of the ylidesto aminophosphonium such as formula (me2n) 3p - chme2] (+).moe, or derivatives of the formula phosphoranylidenes, such as:[me3p (hc = pme3) + t-buo -. the invention also relates to the catalystsoverbased as new products.