Dev International

China Clay

China clay is available in the form of lumps and powder (Pure white colour, off white colour and calcined powder). Low shrink – swell capacity at 1300& 186C is about 12 Percent Lowcation exchange capacity (1-15 meq/100g High luster, opacity, gloss High mechanical strength Dimensionally stable Improved electrical properties High extrusion properties Anti cracking Applications:- Paints: It is used in various paints like distempers, cement primer, wood primer, texture paint, spray plaster, putties, fillers &undercoats. China clay due to its lamellar structure imparts toughness to coatings and tends to reinforce the films. It settles slowly in water and having low solubility in water, it is commonly used in water based paints. Due to its low solubility in the aqueous phase and its ability to impart good brushing and leveling characteristics, it is mainly used in latex paints. Adhesives & Sealants In adhesives & sealants, china clay gives good barrier effects and rheology control. The controlling rheology influences the speed at which adhesive can be applied which is important in high speed paper laminating processes. The low surface hydroxyl content of calcined China clay leads to a low moisture pick-up, resulting in excellent performance in moisture sensitive sealant applications. Calcined clay is also effective as structure building components.

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