also known as Buna-N
, or NBR
, is a synthetic rubber copolymer
(ACN) and butadiene
. Trade names include Nipol
.Nitrile butadiene rubber
) is a family of unsaturated copolymers of 2-propenenitrile and various butadiene monomers (1,2-butadiene and 1,3-butadiene). Although its physical and chemical properties vary depending on the polymer’s composition of nitrile, this form of synthetic rubber is generally resistant to oil, fuel, and other chemicals (the more nitrile within the polymer, the higher the resistance to oils but the lower the flexibility of the material).
It is used in the automotive and aeronautical industry to make fuel and oil handling hoses, seals, and grommets. NBR’s ability to withstand a range of temperatures from -40 °C to +108 °C makes it an ideal material for aeronautical applications. Nitrile butadiene is also used to create moulded goods, footwear, adhesives, sealants, sponges, expanded foams, and floor mats.
Its resilience makes NBR a useful material for disposable lab, cleaning, and examination gloves. Nitrile rubber is more resistant than natural rubber
, but has inferior strength and flexibility. Nitrile gloves are nonetheless three times more puncture-resistant
than natural rubber gloves.
Nitrile rubber is generally resistant to aliphatic hydrocarbons
. Nitrile, like natural rubber, can be attacked
, aromatic hydrocarbons