Method for the continuous production of organopolysiloxane gum solution
AssigneeDow Corning Toray Silicone Co., Ltd.
InventorsFumitaka Suto, Hideyuki Mori, Norikatsu Higuchi, Norio Matsuda
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Abstract
A highly productive method for the continuous production of homogeneous solutions of organopolysiloxane gums is carried out by mixing a solvent and an organopolysiloxane gum. It is characterized by using for mixing, a twin screw compounding extruder which is self-cleaning in which the extruder has at least 2 solvent feed ports downstream from the gum feed port and the internal pressure in the extruder is maintained at a value from 0.00981 to 0.981 MPa during the process.
Claims6
In a process of continuously producing organopolysiloxane gum solutions by mixing a solvent with an organopolysiloxane gum, the improvement comprising using in the process a self-cleaning twin screw compounding extruder in which the solvent is introduced in at least two separate stages, each stage being located downstream of the point where the gum is introduced to the extruder, and maintaining an internal pressure of 0.00981 to 0.981 MPa in the extruder during the process.
Dependencies are inferred from the claim text.