Chowdhry Rubber and Chemical Co. Supplies Calcium Carbonate for Master Batches. Chowdhry Rubber and Chemical Co. Is an ISO 9001:2000 accredited company. The company supplies premier grade rubber chemicals like Microfine, Kinfine, EVA, hi-tech black carbon rubber chemicals, synthetic rubber chemicals, pigments, pilcure MBT, pilcure MOR, pilcure DCBS, pilcure ZDC, pilcure TMT, pilflex-13, pilflex-100, pilnox-TDQ, pilgrade-PVI, etc. The Calcium Carbonate for Master Batches is widely used as extender in paints, filler in plastics and also for manufacturing PVC Compound, master Batches and PVC Pipes.