Method and device for producing recycled elastomer material to be crosslinked
AssigneeRubbergreen Industrie
InventorsSaid Seghar, Olivier Prud'Homme
Life of this patent
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Abstract
Method for producing rubbery material ready for crosslinking, comprising a continuous extrusion of crosslinked rubber, in grains and/or chips, comprising i) decrosslinking by mechanical shearing of said grains and/or chips and increasing the temperature until a decrosslinked paste is formed, ii) cooling said decrosslinked paste with the optional addition of at least one additive, and iii) mixing the cooled decrosslinked paste with at least one crosslinking agent, and collecting, at the end of this continuous extrusion, a pasty mixture forming said rubbery material ready for crosslinking.
Claims19
A method for producing rubbery material ready for crosslinking, comprising
- extrusion of crosslinked rubber, in grains and/or chips, comprising:
- decrosslinking by mechanical shearing of said grains and/or chips of said crosslinked rubber and increasing the temperature until a decrosslinked paste is formed,
- cooling of the decrosslinked paste, and
- mixing of the cooled decrosslinked paste with at least one crosslinking agent, and collecting, at the end of this extrusion process, a pasty mixture forming said rubbery material ready for crosslinking, characterized in that:
- said extrusion is continuous,
- said decrosslinking step is carried out in a twin-screw type extruder, and
- said decrosslinked paste, obtained after the decrosslinking step, comprises a soluble fraction in an amount of between 10 and 35% by weight relative to the total weight of the decrosslinked paste.
Dependencies are inferred from the claim text.