Process for producing pourable powdered rubber containing filler
AssigneeHuls Aktiengesellschaft
InventorsHans-Jurgen Smigerski, Uwe Ernst
Life of this patent
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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.
Claims13
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.
Dependencies are inferred from the claim text.