Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1994-04-28
1995-04-25
Marquis, Melvyn I.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
26421123, 26421124, 523212, 523213, 524266, 524588, 524731, C08K 554
Patent
active
054099781
ABSTRACT:
The present invention relates to a method for the continuous preparation of heat-vulcanizing silicone rubber compounds. The method comprises continuous feeding of (A) 100 weight parts polydiorganosiloxane gum, (B) 5 to 100 weight parts reinforcing filler, and (C) up to 30 weight parts processing aid to a co-rotating twin-screw continuous compounding extruder. The components (A), (B), and (C) are continuously mixed in the extruder at a temperature in a range of about 200.degree. C. to 300.degree. C. The mixed components are then discharged, forming an extrudate. The extrudate is fed continuously to a counter-rotating twin-screw continuous compounding extruder, wherein the extrudate is continuously heat-treated at a temperature in a range of 150.degree. C. to 300.degree. C., forming the silicone rubber compound, which is then discharged from the counter-rotating twin-screw continuous compounding extruder.
REFERENCES:
patent: 4649005 (1987-03-01), Kobayashi et al.
patent: 5198171 (1993-03-01), Kasahara et al.
Hamada Mitsuo
Kinoshita Tomoo
Kunimatsu Kaoru
Nakagawa Teruyuki
Terashima Satoru
Boley William F.
Dow Corning Toray Silicone Co. Ltd.
Marquis Melvyn I.
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