Method for reclamation of vulcanized rubber

Details Method for reclamation of vulcanized rubber Method for reclamation of vulcanized rubber

1982-11-18

1984-09-04

Lieberman, Allan

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

Synthetic resins

Process of treating scrap or waste product containing solid...

521 41, 521 455, C08J 1100

Patent

active

044698178

ABSTRACT:
Reclamation of vulcanized rubber is effected by a method which comprises heating powdered vulcanized rubber to a temperature for desulfurization of the rubber and, on completion of the desulfurization, quickly cooling the desulfurized rubber to a temperature at which substantially no oxidation of desulfurized rubber proceeds. This method obviates otherwise indispensable incorporation of process oil or other similar additive to the powdered vulcanized rubber for the purpose of retarding the oxidation of rubber molecules. When the reclaimed rubber obtained by this method is blended with newly supplied rubber, the resultant vulcanized rubber shows sparing degradation of physical properties.

REFERENCES:
patent: 2645817 (1953-07-01), Brown et al.
patent: 2804651 (1957-09-01), Peterson
patent: 4104205 (1978-08-01), Novothy et al.
patent: 4146508 (1979-03-01), Maxwell

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