Process for Preparation of Polyhedral Oligomeric Silsesquioxanes and Systhesis of Polymers Containing Polyhedral Oligomeric Silsesquioxane Group Segments.
Process for Preparation of Polyhedral Oligomeric
Silsesquioxanes and Systhesis of Polymers Containing
Polyhedral Oligomeric Silsesquioxane Group Segments.
Lichtenhan, J. D.; Gilman, J. W.; Feher, F. J.
U.S. Patent 5,484,867; 8 p. January 16, 1996.
polyhedral oligomeric silsesquioxanes; synthesis
A process for preparation of reactive polyhedral
oligomeric silsesquioxanes and the subsequent synthesis
of polysilsesquioxanes which produce high yield,
tractable polymers containing silsequioxane segments is
provided. A trifunctional polyhedral oligomeric
silsesquioxane of the formula Si7R7O9(OA)3 is corner
capped by reacting it with a compound of the formula M-Z
to form a polyhedral oligomeric silsesquioxane which can
be reacted in various ways with oligomers, polymers,
catalysts, or co-monomers to form polyhedral
silsesquioxane polymers containing silsesquioxanes as
pendant, block, or end group segments. The resulting
polymers are essentially free of impurities and have
controllable properties through the proper selection of
the synthesis process and starting materials.