Nitrile Butadiene Rubber (NBR), otherwise called Buna-N, is an engineered rubber copolymer of acrylonitrile (ACN) and butadiene. NBR display brilliant physical and compound properties. It has focal points, for example, protection from oils, synthetic concoctions, scraped area and weariness. NBR discovers significant applications in glove producing and the car business. Capacity of NBR to withstand wide temperature ranges from – 40°C to +120°C makes it reasonable for outrageous car applications. Powder rubber alludes to a molecule size of 1.0 mm with favorable circumstances, for example, simple stockpiling and transportation. Powdered type of NBR with all NBR properties discovers significant applications in PVC adjustment, cars, grating materials, gaskets and cements, among others.
Currently, the NBR powder market stands at more than 70 kilo tons globally of which, unorganized market accounts for a significant share. Linear and cross-linked are the two major types available in the global NBR powder market. However, there are products with semi-cross linked characteristics. These have applications similar to those of cross-linked products. Cross-linked NBR powder is the major type, accounting for more than 80% of the global market in 2012. Availability and supply of raw materials such as butadiene and acrylonitrile has been a crucial factor in the industry. Tight supply of raw materials led to a price increase during 2008 to 2010. This resulted in a shift towards other substitutes of NBR powder, thereby affecting the global demand for NBR powder.
Cross-linked NBR powder is majorly used in PVC modification applications. It is also used to modify resins such as acrylonitrile butadiene styrene (ABS) and phenolic resins. They provide flexibility and impact resistance in thermoplastic formulations. Linear NBR powder is used in various applications such as gaskets, hoses and seals. Automobile is another major application market for NBR powder. NBR powder is used in interior moldings, weather strips, auto interior skins and friction materials. Friction materials is expected to be the fastest growing segment due to rising demand for disc pads, clutch facings, brake linings and railway brake blocks, among others. NBR powder in frictional material further raises shock and heat fading resistance, and decreases hardness. Buildings, footwear and consumer goods are other key applications of NBR powder.