Process for preparing hydrogen siloxane copolymers
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United States of America Patent
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Dec 16, 1997
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N/A
app pub date -
Jul 30, 1996
filing date -
Jul 30, 1996
priority date (Note) -
Expired
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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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