Process for producing pourable powdered rubber containing filler
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United States of America Patent
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Nov 29, 1988
Grant Date -
N/A
app pub date -
Apr 5, 1988
filing date -
Jul 14, 1987
priority date (Note) -
Expired
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Abstract
A process for preparing a pourable powdered rubber containing filler, comprising preparing a blend by mixing a portion of said filler to be incorporated in said rubber product with 0.1 to 6.5 phr of a water-soluble salt of a Group IIa, IIb, IIIa or VIII metal of the Periodic Table and a rubber latex or aqueous emulsion of a rubber solution, adjusting the pH of the blend to a pH ranging from 3.2 to 8.6 by addition of an acid, adding the remaining amount of filler to the pH adjusted blend, separating the rubber containing filler from the aqueous phase of the blend, and drying the powdered rubber product obtained.
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