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| Number | Title | Issue Date |
| 6379452 | Calcined kaolin clay pigments having improved color and process for the manufacture thereof Calcined kaolin clay pigments having improved color are manufactured by adding a blue agent to the kaolin clay pigment prior to calcination, and then calcining the pigment and blue agent mixture.... | 04/30/2002 |
| 6336966 | Pigment dispersions containing dispersants having core and arm star architecture prepared by controlled radical polymerization A pigment dispersion comprising pigment, an aqueous carrier selected from water and a mixture of water and at least one organic solvent, and a pigment dispersant is described. The pigment dispersant has core and arm star-type architecture, and is prepared... | 01/08/2002 |
| 6221473 | Rare-earth and alkali sulphide, method for preparing same and use thereof as a pigment The present invention concerns a sulfide of a rare earth and an alkali, a process for its preparation and its use as a colored pigment. The sulfide is characterized in that it has the formula ABS2 where A represents at least one alkali and B re... | 04/24/2001 |
| 6051060 | Method of making pigment with increased hydrophilic properties A method for making coated pigment particles by forming a suspension of the desired pigment particles in a medium that also comprises a polymer characterized by having hydrophobic moieties on the polymer backbone and ionic moieties that are present on, or... | 04/18/2000 |
| 5645636 | Pasty pigment preparations, preparation thereof and use thereof The deliveries to the printing ink industry of pigment preparations in the form of flushed pastes increasingly take the form of containers. Given the required high pigment content of the pastes and the attendant high viscosity and thixotropy, there are ve... | 07/08/1997 |
| 5207829 | Pigment preparations Pigment preparations whose pigment portion is composed essentially of organic pigments and of pigment additives of the formula I ##STR1## in which P is a radical of an organic pigment and X in the methylene groups of the lactam ring is hydrogen, C | 05/04/1993 |
| 5125975 | Purification of opal and opal oleate to remove aniline Opal and opal oleate with aniline contents of less than 500 parts per million are prepared by dissolving opal in sulfuric acid and recrystallizing. The recrystallized opal is converted to opal oleate using oleic acid. The opal oleate with low aniline cont... | 06/30/1992 |
| 5082498 | Highly concentrated solid pigment formulations Solid pigment formulations containing from 70 to 97% by weight, based on the total weight of the formulation, of one or more pigments and also from 3 to 30% by weight, based on the total weight of the formulation, of at least one surfactant which is an ad... | 01/21/1992 |
| 5030283 | Pastelike pigment formulations and preparation and use thereof The invention relates to readily storable flushed pastes of pigments of the arylparaosanilinesulfonic acid series, consisting essentially of (a) up to 50% by weight of the pigment, in a binder combination of (b) natural resin esters based on unmodified or... | 07/09/1991 |
| 5026627 | High strength alkali blue pigment toner useful in both oil-based and water-based systems The alkali blue dry toner comprises 60 to 98 weight percent alkali blue pigment particles, 1 to 20 weight percent of di- and tri-decyl phosphate esters of free acids, and 1-20 weight percent of dehydroabietyl amine. The toner exhibits a high strength and ... | 06/25/1991 |
| 4789404 | Soft textured high strength alkali blue pigment and process for preparing the same A process for preparing a soft textured high strength Alkali Blue pigment toner comprising preparing an initial mixture from an alkali metal hydroxide, Alkali Blue pigment, resin, oil or varnish, free fatty acid and water and adding a mineral acid to said... | 12/06/1988 |
| 4469519 | Soft textured high strength Alkali Blue pigment It has been discovered in accordance with the instant invention that a process which combines a relatively low temperature heat treatment of precipitated Alkali Blue slurry with subsequent freeze drying of the presscake yields a product which exhibits sup... | 09/04/1984 |
| 4456485 | Process for the preparation of easily dispersible, high color strength, powdered alkali blue pigments Easily dispersible alkali blue pigments with high color strength are obtained if the pigment is precipitated in the presence of (1) primary, secondary or tertiary aliphatic amines, (2) N-alkylamino alkanic acid, (3) a diaryl or triarylamine, (4) an acid o... | 06/26/1984 |
| 4383865 | Soft textured high strength alkali blue pigment Alkali blue pigment composition characterized by a soft texture and high strength. Pretreated aqueous solutions of the alkali blue pigments are treated with an alkaline solution of an alkyarylsulfonic solution of an amine to recover the desired pigment co... | 05/17/1983 |
| 4373962 | Surface treated alkali blue pigment A soft textured high strength Alkali Blue pigment is produced by treating an aqueous dispersion of the pigment from a regular, untreated presscake with an aqueous solution of a tertiary amine acetate followed by the addition of ammonium hydroxide. Alterna... | 02/15/1983 |
| 4309320 | Pigment flushing In the method for transferring an organic pigment from an aqueous pulp to a water-immiscible hydrophobic organic vehicle the improvement to achieve low initial viscosity, good shelf stability, and good tint strength comprising incorporating an additive se... | 01/05/1982 |
| 4189328 | Method of producing a greener shade Alkali Blue product and product produced thereby This invention is concerned with the modification of the hue of Alkali Blue pigments of known organic structures by intimate incorporation under aqueous alkaline conditions of a minor amount of a phenolic compound, illustratively beta naphthol. Upon recov... | 02/19/1980 |
| 4032357 | Easy dispersing alkali blue powder and process for manufacture An easy dispersing alkali blue type pigment product and a process for making the same is provided which retains the color strength per unit alkali blue present of a flushed color product, but which contains less oil phase than a flushed color and is a fre... | 06/28/1977 |
| 3954495 | Process for the production of pigments useful for waxless carbon paper Pigment preparations containing carbon black, blue pigment and a wetting agent are prepared having an intimate inseparable mixture based on the total amount of pigment of 60-95 wt. % carbon black pigment and 40 to 5 wt. % blue pigment and based on 100 par... | 05/04/1976 |
