Reclaimed rubber and process for producing the same
AssigneeBridgestone Corporation
InventorsNobumitsu Ohshima, Jingo Shirasaka, Setsuo Akiyama
Life of this patent
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Abstract
Reclaimed rubber which is obtained through devulcanization and has excellent physical properties as a vulcanized material, and a process for producing the same are provided. In the reclaimed rubber obtained by devulcanizing vulcanized rubber, the proportion of sol is 80% or higher, and the peak top molecular weight of sol as determined by gel permeation chromatography (GPC) is 100,000 or less.
Claims6
Reclaimed rubber obtained by devulcanization of vulcanized rubber, wherein the proportion of sol in the reclaimed rubber is 80% or higher and the peak top molecular weight of the sol as determined by gel permeation chromatography (GPC) is 100,000 or less.
A process for producing reclaimed rubber, the proportion of sol in the reclaimed rubber being 80% or higher and the peak top molecular weight of the sol as determined by gel permeation chromatography (GPC) being 100,000 or less, which comprises the step of devulcanizing vulcanized rubber using a biaxial extruder with its shaft rotation rate set at 150 to 300 rpm and its maximum cylinder temperature range adjusted to from 280 to 350° C.
Dependencies are inferred from the claim text.