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Nitrile rubber, also known as Buna-N, Perbunan, acrylonitrile butadiene rubber, and NBR, is a synthetic rubber copolymer of acrylonitrile (ACN) and butadiene.Trade names include Nipol, Krynac and Europrene.Nitrile butadiene rubber (NBR) is a family of unsaturated copolymers of 2-propenenitrile and various butadiene monomers (1,2-butadiene and 1,3-butadiene).he process for the production of cold NBR is very similar to that of hot NBR. Polymerization tanks are heated to 5â15 Â°C instead of 30â40 Â°C. Under lower temperature conditions, less branching will form on polymers (the amount of branching distinguishes cold NBR from hot NBR).
Ben: That girls NBR is nasty. Too much nipple not enough boob.. If the nipple's too small it feels like you're playing with a guys nipple and it's just not right either.A healthy NBR is considered approximately 1 part nipple for every 6 parts boob.oo much nipple not enough boob.. If the nipple's too small it feels like you're playing with a guys nipple and it's just not right either.