Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Shaping by extrusion
Reexamination Certificate
2006-01-24
2006-01-24
Moore, Margaret G. (Department: 1712)
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Shaping by extrusion
C523S212000, C524S588000, C366S078000, C366S079000, C366S083000, C366S085000, C366S091000
Reexamination Certificate
active
06989120
ABSTRACT:
A continuous process of preparing a heat-vulcanizable filled silicone composition, comprises mixing filler and high viscosity silicone polymer continuously in a first co-rotating intermeshing twin screw extruder; and compounding a filler and silicone polymer mixture from the first extruder in a second single shaft reciprocating extruder. Another continuous process of preparing a heat-vulcanizable filled silicone composition, comprises forming a premix′ of filler and high viscosity silicone polymer; mixing the premix and additional high viscosity silicone polymer continuously in a co-rotating intermeshing twin screw extruder; and compounding a filler and silicone polymer mixture from the co-rotating intermeshing twin screw extruder in a second single shaft reciprocating extruder.
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Mathur Devesh
Tate Alan L.
Freedman Philip D.
General Electric Company
Moore Margaret G.
Wheelock Kenneth S.
Zimmer Marc S
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