Patent ID: 6284858
Filing Date: 2001-09-04
Classification: C08G

Abstract:
A process for preparing silicone compounds in which Si--O-- at the end of the molecular chain of silanol-free cage and/or ladder polyphenylsilsesquioxanes represented by formula (1): ##STR7##wherein n is an integer from 2 to 5000,is linked to at least one triorganosilyl group containing reactive functional group X represented by formula (2): ##STR8##whereinX is selected from the group consisting of(A) CH.sub.2.dbd.CH--,(B) CH.sub.2.dbd.C(R.sub.4)--COO--R.sub.3 --,(C) ##STR9##--CH.sub.2 --O--R.sub.3 --,(D) H.sub.2 N--R.sub.3 --,(E) HO--R.sub.3 --, and(F) HS--R.sub.3 --,R.sub.3 is an alkylene group containing 1 to 3 carbon atoms, andR.sub.4 is a hydrogen atom or a methyl group,said process comprising:subjecting cage-terminated and silanol-free cage and/or ladder polyphenylsilsesquioxanes to an equilibrium reaction under heat with a disiloxane containing reactive functional groups represented by formula (3): ##STR10##wherein X is the same as defined above, in an organic solvent in the presence of an alkaline rearrangement and condensation catalyst.