| Patent No: | IN311161 [India] | Application No: | 2686/DEL/2012 |
| Title: | Blue colored inorganic pigments, having near infrared reflectance, based on mixtures of lanthanum, strontium, copper and lithium silicate and process thereof | ||
| Issue Date: | 12-04-2019 | File Date: | 30-08-2012 |
| Inventor(s): | Reddy, Mundlapudi Lakshmipathi; Jose, Sheethu | ||
| IPC Classification: | C09K | ||
| Abstract: | Nontoxic Near Infrared Reflecting (NIR) inorganic pigments, characteristically blue and well suited for the coloration of a wide variety of substrates, for example, plastics and concrete building roofing material, etc., comprise mixed metal silicate having the general formula: LaxSr1-xCu1-yLiySi4O10, where x is equal to 0 to 0.5 and y is equal to 0 to 0.5. These silicates with tetragonal crystal structure are prepared by calcination method in air atmosphere. | ||