Carboxylated nitrile rubber (XNBR) is an improved version of nitrile rubber with enhanced properties. Carboxylated nitrile rubber is a type of modified nitrile rubber, and has extra cross linking abilities. Carboxylated nitrile rubber (XNBR) is also known as carboxylated butadiene nitrile rubber. Carboxylated nitrile rubber is a terpolymer formed with the help of three types …