Patent application number | Description | Published |
20100099877 | NEW 2,9-DICHLOROQUINACRIDONE IN PLATELET FORM - The present invention is directed to a new 2,9-dichloroquinacridone in platelet form, a process for its preparation and its use for coloring high molecular weight organic material. The 2,9-dichloroquinacridone in platelet form has a length of 1 to 45 μm, a width of 0.1 to 20 μm and an average thickness of 0.01 to 5 μm and is characterized in that the hue-value h in remission is ≦31 and/or the lightness L* in transmission is ≧20 and/or a decreasing b* value and an increasing a* value from an illuminating and viewing angle (aspecular angle) 45°/110° (+25°) to 45°/90° (+45°). | 04-22-2010 |
20110009536 | C.I. PIGMENT VIOLET 37 IN ROD-LIKE FORM - The present invention is directed to a new C.I. Pigment Violet 37 in rod-like form, a process for its preparation and its use for coloring high molecular weight organic material. The C.I. Pigment Violet 37 in rod-like form having a length of 0.5 to 30 μm, a width of 0.05 to 1 μm, especially 0.100 to 0.500 μm and an average thickness of 0.01 to 0.200 μm, especially 0.03 to 0.100 μm. | 01-13-2011 |
20110038947 | INORGANIC PHOSPHOR, OBTAINABLE BY WET MILLING - The invention relates to inorganic phosphors, obtainable by wet milling and having a particle size distribution of D90<5 μm, to a method for producing said pigments and the use thereof. The use of wet milled inorganic phosphor particles wherein 90 percent of the particles have a diameter of equal to or less than 5 μm, especially equal to or less than 3 μm, very especially equal to or less than 1 μm can provide for an improved fluorescence in contrast to the general believe. | 02-17-2011 |
20110294385 | ORGANIC BLACK PIGMENTS AND THEIR PREPARATION - A process for preparing a black colorant, preferably a black pigment, characterized in that a compound of the Formula (I) is reacted with a compound of the Formula (II) in a molar ratio of 1:2, in the presence of a catalyst which in water at 25° C. has a pK≦4.5. For the definition of R | 12-01-2011 |
20110297898 | PREPARATION OF A PHOTOCHROMIC INK - The present invention relates to a photochromic ink, the process for its preparation which is based on a spiropyran powder obtainable by melting, cooling and crushing, and to a new form of a spiropyran obtainable thereby. Said process to prepare a photochromic ink comprises the steps of a) heating and melting the spiropyran at a temperature below 250 C, b) cooling the melt to obtain a solidified spiropyran, c) crushing the solidified spiropyran to obtain a powder, d) optionally adding the powder to a binder providing the basis for the photochromic ink. | 12-08-2011 |
20120126184 | SURFACE-MODIFIED PIGMENT COMPOSITIONS - The invention relates to a compound comprising a chromophore of formula (II), wherein m is an integer from 1 to 4, preferably 1 or 2; Q | 05-24-2012 |
20130026428 | PREPARATION OF A PHOTOCHROMIC INK - The present invention relates to a photochromic ink, the process for its preparation which is based on a spiropyran powder obtainable by melting, cooling and crushing, and to a new form of a spiropyran obtainable thereby. | 01-31-2013 |
20140366777 | PROCESS FOR THE PRODUCTION OF PRECIPITATED CALCIUM CARBONATE, PRECIPITATED CALCIUM CARBONATE AND USES THEREOF - The present invention relates to a process for the production of precipitated calcium carbonate, comprising the following steps: a) providing a reaction vessel containing an aqueous phase at an initial temperature; b) injecting a carbon dioxide generating compound into the aqueous phase until the pH of the aqueous phase is in the range of around 5 to around 7; and c) subsequently adding a calcium hydroxide slurry at an initial temperature to the reaction vessel while continuing the injection of the carbon dioxide generating compound, in order to obtain an aqueous slurry of the precipitated calcium carbonate. The addition rate of the calcium hydroxide slurry to the reaction vessel in step c) is such that an average electrical conductivity of the reaction contents in the reaction vessel during the reaction is in a range of 100 to 6 000 μS/cm. | 12-18-2014 |
20150056124 | PROCESS FOR PREPARING SCALENOHEDRAL PRECIPITATED CALCIUM CARBONATE - The present invention provides a process for preparing a precipitated calcium carbonate product. The process comprises the steps of preparing slaking quick time to obtain slaked lime; and subjecting the slaked lime, without agitation, without prior cooling in a heat exchanger, and in the absence of any additives, to carbonation with carbon dioxide as to produce PCC. The newly prepared product develops better performance thanks to improved resistance during processing. | 02-26-2015 |