Combination of nitrile rubber

The polarity of nitrile rubber is very strong, and the compatibility with other polymers is generally not very good,

but it is compatible with chloroprene rubber, modified phenolic resin, polyvinyl chloride and other polar polymers,

especially with chlorine-containing polymers. The polymers have good compatibility and are often used in combination.

In addition, in order to improve processability and performance, nitrile rubber is often used in combination with non-polar

rubbers such as natural rubber, styrene-butadiene rubber, and butadiene rubber. It should be pointed out that nitrile rubber

is characterized by good oil resistance, and it has a tendency to reduce oil resistance when used in combination with other

polymers (except polyvinyl chloride). High performance hydrogenated nitrile rubber

With the development of the automobile industry, stringent requirements have been placed on the heat resistance,

oil resistance, and corrosion resistance of various chemicals for automobile fuel and lubrication systems and sealing materials

used in engines, such as rubber. For a long time, the automobile industry has been using nitrile rubber with good oil resistance.

Due to its own defects, it can only be used for a long time below 120 °C; moreover, due to its poor ozone resistance, weather

resistance and radiation resistance, it cannot meet the needs of motor vehicles such as automobiles. Vehicle sealing requirements

for the engine. Hydrogenated nitrile rubber (HNBR) is the hydrogenation product of nitrile rubber. It not only has good oil resistance,

ozone resistance, abrasion resistance and chemical corrosion resistance, but also has good compression set, heat resistance

and low temperature resistance, and can be used to manufacture sealing products used in harsh conditions.