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 IS EFFECTED BY (A) COMBINING (1) AN AQUEOUS WET HYDRATED SILICA PIGMENT PRECIPITATE WHICH HAS A BOUND ALKALI CONTENT, WHICH HAS BEEN PREPARED BY PRECIPITATION FROM AN AQUEOUS SOLUTION OF ALKALI METAL SILICATE, AND WHICH HAS BEEN CONTINUOSULY MAINTAINED IN AN AQUEOUSLY WET STATE WITHOUT HAVING BEEN DRIED THEREFROM AFTER ITS PRECIPITATION, WITH OR WITHOUT TREATMENT WITH A SELECTED REACTANT AND (2) AN AQUEOUS DISPERSION OF HYDROXY CONTAINING ELASTOMER AND ANIONIC DISPERSING AGENT, WITH OR WITHOUT (3) CARBON BLACK AND/OR PROCESSING OIL, AND (4) SELECTED COAGULANT, AND (B) RECOVERING THE RESULTING COAGULUM AS A MASTERBATCH, THE STEPS PRIOR TO (B) HAVING RENDERED THE SERUM OF THE AQUEOUS MIXTURE ESSENTIALLY FREE OF SILICA PIGMENT. THE PRODUCT PREPARED BY THE PROCESS IS A HYDROXYL GROUP CONTAINING ELASTOMER-SILICA PIGMENT MASTERBATCH.
Inventors
- 👤 Oliver W Burke Jr
Bibliographic Details
Claims Analysis
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