Process for preparing hydrogen siloxane copolymers

Details Process for preparing hydrogen siloxane copolymers Process for preparing hydrogen siloxane copolymers

1996-07-30

1997-12-16

Dean, Ralph H.

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

Synthetic resins

From silicon reactant having at least one...

528 14, 528 23, 528 37, C08G 7704

Patent

active

056986548

ABSTRACT:
A sequential catalysis of the ring opening polymerization of cyclic organosiloxanes using a base catalyst that can be neutralized by a subsequent redistribution and condensation catalyst such as a Lewis acid catalyst, preferably a phosphonitrilic compound, permits the rapid synthesis of functionalized and poly-functionalized silicone copolymers such as alkenyl hydride copolymers, a new composition of matter.

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