Method for producing a rubber melt in a temperature-controlled s

Details Method for producing a rubber melt in a temperature-controlled s Method for producing a rubber melt in a temperature-controlled s

1980-01-15

1982-06-01

Henderson, C. A.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Treating polymer containing material or treating a solid...

260816R, 260816G, 425208, 528502, C08C 400

Patent

active

043329322

ABSTRACT:
When rubber is melted and decomposed in a screw extruder, a rubber melt can be produced without using a heavy oil with minimized evolution of gas by controlling the extruder cylinder temperature in the decomposing section of the screw within the range of 400.degree.-500.degree. C. and cooling the melt in the discharging section of the screw to a temperature of not more than 250.degree. C. The screw extruder suited for practising this method comprises a screw having a feeding section, a compressing section, a decomposing section and a discharging section which are arranged in that order from the inlet side, and a cylinder assembly consisting of a heating cylinder and a cooling cylinder arranged in that order from the inlet side, said feeding, compressing and decomposing sections of the screw being located corresponding to said heating cylinder, and said discharging section of the screw being located corresponding to said cooling cylinder.

REFERENCES:
patent: 2487666 (1949-11-01), Navone
patent: 2871205 (1959-01-01), Mankowich
patent: 3340304 (1967-06-01), Hall
patent: 3341621 (1967-09-01), Hagemeyer, Jr.
patent: 3458494 (1969-07-01), Scoggin

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