Preparation of Organosiloxane Polymers
AssigneeDow Corning Corporation
InventorsAndreas Stammer, Andreas Wolf
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Abstract
A method of making a polysiloxane containing polymer is described. The method comprises the steps of: i) Preparing a polysiloxane containing polymer by the polycondensation of siloxane containing monomers and/or oligomers which comprise at least 2 condensable groups per molecule, in the presence of (a) one or more condensation catalysts and optionally one or both of (b) a diluent (a plasticiser and/or extender) and/or an end-blocking agent; and ii) Where required quenching the polymerisation process. The diluent, when present, is substantially retained within the resulting diluted polysiloxane containing polymer and the process takes place at a pressure of at least 75×105 Pa (0.75 MPa).
Claims16
A method of making a polysiloxane containing polymer comprising the steps of:
- i) preparing a polysiloxane containing polymer by the polycondensation of siloxane containing monomers and/or oligomers which comprise at least 2 condensable groups per molecule, in the presence of
- (a) one or more condensation catalysts and optionally one or both of
- (b) a diluent and/or an end-blocking agent;
- and
- ii) where required quenching the polymerisation process;
- wherein, when present, the diluent, is substantially retained within the resulting diluted polysiloxane containing polymer;
- wherein the process takes place at a pressure of at least 75×105 Pa.
Dependencies are inferred from the claim text.