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US 12,269,194 B2Granted
Rubber formulation
AssigneeAtlantis Rubber Powders B.V.
InventorsChristopher Michael Twigg, Wim Migchels, Jeroen Claessens, Robert Jan Zootjes, Jan Gijsbertus Driessen
Life of this patent
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Abstract
A method for manufacturing micronized rubber powders including grinding of a rubber granulated feedstock, size classification and storage of the micronized rubber powders thus obtained. A rubber formulation including at least one natural or synthetic rubber, a micronized rubber composition and optionally one or more of processing aids, antidegradants, fillers, accelerators and curatives. A method for manufacturing a rubber product, as well as to a solid rubber product.
Claims15
A method for manufacturing micronized rubber powders comprising
- grinding a rubber granulated feedstock to obtain micronized rubber powders, classifying the micronized rubber powders by size, and storing the micronized rubber powders
- wherein during the grinding process an agent is used to prevent particles of the micronized rubber powders from sticking to themselves,
- wherein the agent is chosen from the group of synthetic amorphous precipitated silica and silane-treated synthetic amorphous precipitated silica, or a combination thereof wherein the grinding process of the rubber granulated feedstock comprises a two-step grinding process including ambient grinding followed by cryogenic grinding, and wherein the particle size of the rubber granulated feedstock after the ambient grinding is 0.1-0.8 mm.
Dependencies are inferred from the claim text.