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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.
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Industrial Applications Chemistry, Chemical Processes Polymers [Chemistry, Chemical Processes] Speciality Chemicals [Chemistry, Chemical Processes]