Method for preparing functionalised polyorganosiloxane...

Details Method for preparing functionalised polyorganosiloxane... Method for preparing functionalised polyorganosiloxane...

2008-07-22

2008-07-22

Zimmer, Marc S (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From silicon reactant having at least one...

C528S025000, C528S031000

Reexamination Certificate

active

10509071

ABSTRACT:
The present invention relates to a process for preparing functionalized polyorganosiloxane (POS) resins 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), with, in these units: R=C1-C10alkyl or a C8-C12aryl and Y a functional group (e.g.: Si—H),by redistribution of POS resins using POSf bearing functional units M′ and/or D′ and/or in the presence of an acid catalyst of the trifluoromethane-sulfonimide (TFSI) type.The present invention also relates to the aforementioned catalyst system.

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