Elastomer-silica pigment masterbatches and production processes relating thereto

Abstract

Abstract CURBING OF SILICA PIGMENT LOSSES AND THE PROMOTION OF UNIFORMITY OF PRODUCT IN THE PREPARATION OF AN ELASTOMERSILICA PIGMENT MASTERBATCH ARE EFFECTED (A) BY COMBINING (1) AN AQUEOUS SLURRY OF HYDRATED SILICA PIGMENT PRECIPITATE WHICH HAS A BOUND ALKALI CONTENT, WHICH HAS BEEN PREPARED BY PRECIPITATION FROM AN AQUEOUS ALKALI METAL SILICATE SOLUTION, AND WHICH HAS BEEN CONTINUOUSLY KEPT IN AN AQUEOUSLY WET STATE WITHOUT HAVING BEEN DRIED AFTER ITS PRECIPITATION - WITH OR WITHOUT ADDITION IN AQUEOUS SOLUTION OF (2) REACTANT SELECTED FROM THE MEMBERS OF GROUP (I) THE WATER SOLUBLE SALTS OF ALUMINUM AND ZINC, GROUP (II) THE WATER SOLUBLE SALTS OF ALKALINE EARTH METALS, GROUP (III) THE WATER SOLUBLE ACIDS AND GROUP (IV) COMBINATIONS OF ANY TWO OR MORE OF THE FOREGOING MEMBERS - WITH (B) AN ORGANIC SOLVENT DISPERSION OF ELASTOMER CONSISTING ESSENTIALLY OF NITROGENOUS POLYMER CONTAINING 0.1 TO 20% OF NITROGEN IN THE FORM OF GROUPS SELECTED FROM THE CLASS CONSISTING OF AMIDE PRIMARY, SECONDARY AND TERTIARY AMINE, AND QUATERNARY AMMONIUM GROUPS - WITH OR WITHOUT (3) CARBON BLACK AND/OR PROCESSING OIL - AND (B) REMOVING THE SOLVENT AND AQUEOUS PHASE AND RECOVERING THE RESULTING COMBINATION AS A MASTERBATCH. NEW PRODUCTS PREPARED BY THE PROCESS ARE ALSO CLAIMED. D R A W I N G

Inventors

• 👤 Oliver W Burke Jr

Bibliographic Details