Process for dispersing concentrated aqueous slurries
April 6, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3676147 3743613 Method of retarding the formation of complexes in rare-earth phosphor containing photosensitive dichromate slurries and aqueous photosensitive slurries Process for dispersing sensitizing dyes Selective precipitation of nickel and cobalt sulfides from acidic sulfate solution Stable suspension system for microencapsulated flowable formulations, and method of preparing stable suspension of microcapsules Aqueous disperse compositions containing clay and oleaginous film-forming materials Photographic materials containing light absorbing methine dyes Process for the neutralization of basic reaction compositions Method for impregnating reinforcing fiber materials with a resinous binder material InventorsApplicationNo. 417876 filed on 04/06/1995US Classes:430/449, NONRADIATION SENSITIVE IMAGE PROCESSING COMPOSITIONS OR PROCESS OF MAKING430/450, Process of preparing composition from plural preformed concentrates430/569Including manipulative emulsification stepExaminersPrimary: Le, Hoa VanAttorney, Agent or FirmForeign Patent References
International ClassG03C 001/38AbstractA process for dispersing a particulate solid substance in a continuos aqueous phase comprising the steps of:providing a comminution reactor;providing a particulate solid substance comprising a weak acid functional group, having effective pKa1 >1 and less than 1% by weight aqueous solubility at pH=pKa1 ;providing an aqueous solution consisting essentially of water or a mixture of water with water-miscible solvent, at pH less than the greater of 7 and pKa1 +2;providing a buffering salt of a weak acid, where the weak acid associated with this buffering salt has pKa2 and wherepKa1 -2ࣘpKa2 ;providing milling media;combining said particulate solid substance, said aqueous solution, said buffering salt, and said milling media in said comminution reactor to produce a multiphase mixture; andmilling said mixture to produce a reduced particle size slurry of said particulate solid substance is disclosed.Field of SearchTo aid dispersion or prevent chemical reaction, deliquescence, agglomeration or frothingLiquids added to make pulp or suspension Subjecting material to impact by moving comminuting surface Miscellaneous NONRADIATION SENSITIVE IMAGE PROCESSING COMPOSITIONS OR PROCESS OF MAKING Process of preparing composition from plural preformed concentrates Including developing accelerator |
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