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 MAINTAINED IN AN AQUEOUS PHASE WITHOUT HAVING BEEN DRIED AFTER ITS PRECIPITATION, WITH (2) A QUANTITY OF OLEOPHILIC QUATERNARY AMMONIUM MATERIAL, (3) COMBINING THE RESULTING TREATED SILICA PIGMENT SLURRY WITH A SOLVENT DISPERSION OF THE ELASTOMER, WITH OR WITHOUT (4) CARBON BLACK AND/OR PROCESSING OIL AND (5) SELECTED REACTANT, AND (B) REMOVING THE SOLVENT AND AQUEOUS PHASE AND RECOVERING THE RESULTING COMBINATION AS A MASTERBATCH ESSENTIALLY WITHOUT LOSS OF SILICA PIGMENT.
Inventors
- 👤 Oliver W Burke Jr
Bibliographic Details
Claims Analysis
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |