COMPOUNDING FILLED SILICONE COMPOSITIONS

PROBLEM TO BE SOLVED: To provide a homogeneous silica filled composition where high levels of silica, processing fluid and high molecular weight silicone polymer are compounded into the homogeneous silica filled composition without forming a preconcentrate of fumed silica and polymer.SOLUTION: The f...

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Hauptverfasser:	SILVI NOBERTO, GIAMMATTEI MARK HOWARD
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CHEMISTRY COMPOSITIONS BASED THEREON GENERAL PROCESSES OF COMPOUNDING INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS MAKING GRANULES OR PREFORMS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL WORKING-UP
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a homogeneous silica filled composition where high levels of silica, processing fluid and high molecular weight silicone polymer are compounded into the homogeneous silica filled composition without forming a preconcentrate of fumed silica and polymer.SOLUTION: The fumed silica 12 is fed into a unitary continuous compounding apparatus at a first location prior to addition of the silicone polymers 22, 24. The fumed silica 12 is then compounded with the silicone polymers 22, 24, which is fed into the compounding apparatus at a downstream location in the compounding apparatus from the first location. The compounding apparatus can be a co-rotating, intermeshing double screw extruder.