Hebei Orient Rubber & Plastic Co., Ltd
Email: orientflex@orientrubber.com
Phone:+86-311-68008301
Skype:orientrubber
Address:NO298 ZHONGHUA NORTH STREET, SHIJIAZHUANG, HEBEI, CHINA.
NBR has excellent oil resistance. Butadiene
dilute monomer can be copolymerized into cis, trans and 1,2-Bromo-based three
different chain structure. The trans form of the typical NBR structure accounts
for about 78%. Because NBR molecular chain structure contains cyano, oil resistance
(such as mineral oil, liquid fuel, animal and vegetable oils and solvents) is
superior to natural rubber, neoprene and styrene-butadiene rubber. Compared
with other rubber, NBR has a wider range of operating temperature, its
long-term use temperature of 120oC, while NBR has good low temperature
performance, the lowest glass transition temperature of up to -55oC.
NBR has good chemical stability and good
processability. With the increase of its relative density, the vulcanization
speed is accelerated and the tensile strength performance is improved, but the
rebound resilience is decreased and the cold resistance is deteriorated. Since
the cyano groups in NBR are susceptible to electric field polarization, the
dielectric properties are deteriorated, and they are semiconductor rubbers. NBR
can be divided into high, high, medium, high, medium and low acrylonitrile five
categories according to the content of ACN.
Production methods of continuous and batch
polymerization of two. Continuous polymerization is usually used for the
production of small varieties and large production, low consumption.
Intermittent polymerization method for multi-species and small batch
production, the use of a small number of polymerization signed, high
construction consumption. So far, do not see the trend of mutual substitution.