| 摘要 |
<p>The invention concerns a method for preparing functionalised polyorganosiloxane resins (POS) and comprising units M: (R3SiO1/2), Q: (SiO4/2) and M': (YaR3-aSiO1/2) and optionally D: (R2SiO2/2) and/or D': (RYSiO2/2) and T: (RSiO3/2) and/or T': (YSiO3/2), wherein, in said units R = C1-C10 alkyl or a C8-C12 aryl, and Y a functional group (for example, Si-H), by redistribution of POS resins, using POSf bearing functional groups M' and/or D' and/or in the presence of an acid catalyst such as triflic acid or one of its derivatives and a non-basic inert filler: carbon black, diatom earth, zeolite or acid or neutral oxide (Al2O3, Na2O, TiO2, MgO, silica). The invention also concerns said catalytic system.</p> |
