BUNA_N in N is the abbreviation of Nitrile, which is the meaning of acrylonitrile, which is the abbreviation of nitrile rubber. So BUNA-N is nitrile rubber, and the abbreviation of sodium butyl rubber is BUNA, that is, BU and NA are separated, BU is butadiene, and NA is sodium.Sodium butadiene rubber and butadiene rubber are with polybutadiene monomer, which is formed by bulk polymerization, was named nitrile is sodium metal as initiator by liquid phase or gas phase polymerization of butadiene prepared. The butadiene rubber is through emulsion polymerization and into the.The main characteristic is high nitrile 1,2- chain content, degree of branching, wide molecular weight distribution, is now used rarely, the main feature is the higher dynamic characteristics (anti multiple pull strong) and low fever, with butadiene rubber is also similar, is not the same type of polymerization.
BUNA is a brand of foreign Buna, Russia now used more it has two kinds of structure of a BUNA_S (the equivalent of domestic butadiene rubber (BUNA_N) is China's Ding Qingjiao).
Buna-N is one kind of rubber material,BUNA means "butadiene",BUNA originated in World War II and was first synthesized by Germany. It is made from sodium and hence called sodium butyl rubber
