Process for making siloxane compositions
AssigneeDow Corning Corporation
InventorsRemy Bischoff, Richard Taylor
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Abstract
A process for making a dispersion of a high viscosity siloxane in a volatile cyclosiloxane comprises the step of effecting ring-opening polymerisation of a volatile cyclosiloxane under catalysis by a phosphazene base, and the step of stopping the polymerisation reaction before completion of the ring-opening polymerisation of the cyclosiloxane has occurred. Preferably the polymerisation reaction is stopped by adding carbon dioxide or an acid.
Claims14
A process for making a dispersion of a high viscosity siloxane in a volatile cyclosiloxane, which comprises the step of effecting ring-opening polymerisation of a volatile cyclosiloxane under catalysis by a phosphazene base, and the step of stopping the polymerisation reaction before completion of the ring-opening polymerisation of the cyclosiloxane has occurred.
A dispersion of a high viscosity siloxane in a volatile cyclosiloxane produced by a process which comprises the step of effecting ring-opening polymerization of a volatile cyclosiloxane under catalysis by a phosphazene base, and the step of stopping the polymerisation reaction before completion of the ring-opening polymerisation of the cyclosiloxane has occurred.
Dependencies are inferred from the claim text.