초록 ▼

A continuous process for producing a silicone polymer comprises the sequential steps of (i) polymerisation of a linear silanol group containing siloxane by condensation polymerisation, or of a cyclosiloxane by ring opening polymerisation, or of a mixture of said linear and cyclosiloxanes with a phos

A continuous process for producing a silicone polymer comprises the sequential steps of (i) polymerisation of a linear silanol group containing siloxane by condensation polymerisation, or of a cyclosiloxane by ring opening polymerisation, or of a mixture of said linear and cyclosiloxanes with a phosphazene base in the presence of water and the presence or absence of a filler in an extruder, (ii) neutralising the reaction mixture in an extruder, and (iii) stripping the neutralised reaction mixture to remove volatile materials. Preferably, step (iii) is performed in an extruder, more preferably steps (i), (ii) and (iii) are all performed in the same extruder.

대표청구항 ▼

[ That which is claimed is:] [1.]1. A continuous process for producing a silicone polymer which process comprises the sequential steps of (i) producing a silicone polymer by a polymerisation reaction selected from the group consisting of polymerisation of a linear silanol group containing siloxane b

[ That which is claimed is:] [1.]1. A continuous process for producing a silicone polymer which process comprises the sequential steps of (i) producing a silicone polymer by a polymerisation reaction selected from the group consisting of polymerisation of a linear silanol group containing siloxane by condensation polymerisation, polymerisation of a cyclosiloxane by ring opening polymerisation, and polymerisation of a mixture of said linear and cyclosiloxanes, with a phosphazene base in the presence of water optionally a filler in an extruder forming a reaction mixture, (ii) neutralising the reaction mixture in an extruder, and (iii) stripping the neutralised reaction mixture to remove volatile materials.