| 摘要 |
The invention provides a method for preparing functionalized polyorganosiloxane resins (POS) comprising units M: (R<SUB>3</SUB>SiO<SUB>1/2</SUB>), Q: (SiO<SUB>4/2</SUB>) and M': (Y<SUB>a</SUB>R<SUB>3-a</SUB>SiO<SUB>1/2</SUB>) and optionally D: (R<SUB>2</SUB>SiO<SUB>2/2</SUB>) and/or D': (RYSiO<SUB>2/2</SUB>) and T: (RSiO<SUB>3/2</SUB>) and/or T': (YSiO<SUB>3/2</SUB>), wherein in said units R is C<SUB>1</SUB>-C<SUB>10 </SUB>alkyl or C<SUB>8</SUB>-C<SUB>12 </SUB>aryl and Y is a functional group (such as Si-H), by redistributing 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, diatomaceous earth, zeolite or acid or neutral oxide (Al<SUB>2</SUB>O<SUB>3</SUB>, Na<SUB>2</SUB>O, TiO<SUB>2</SUB>, MgO, silica). The invention also provides said catalyst system. |
