Introduction
Chloroprene rubber SN321 is a general purpose, it is obtained by Chloroprene monomer by emulsion polymerization with low rate of
crystallization. It is adopted the world advanced technology and processes in regulating the molecular weight, it can be seen as an equivalent to
Dupont GW (M2) of the United States.
Characteristics
1. Good properties of physical mechanics and plastication;
2. Under mechanical shear, Breakdown of SN321 molecular chain is weaker than SNR12- series, is
stronger than SNR12- series in the thermal stability;
3. Better compatibility in combination with other types;
4.Good resistant to oil, chemical reagents, ozone aging, sunlight, extension of the fine is not flammable
and better electrical, as well as processing of security and stability;
5.Compared with CR322, Mooney viscosity of SN321 is uniform and stable, better processability, more
mastication, mixing and extrusion, the surface of sheet is flat and smooth and smaller shrinkage,
the products appearance is good;The same processability as Dupont GW of the United States.
Appearance
Light yellow or amber chips, with talcum as a release agent, no mechanical impurities, no scorch
particles.
Typical property
Item SN321
Mooney viscosity ------------------------------ML (1+4) 100 ºC 37 - 49
Mooney scorch MSt5, min -------------------≥ 25
Module at 500% elongation, MPa ------------2.0 - 5.0
Tensile strength, MPa ≥---------------------- 22.0
Ultimate elongation, % ≥ ---------------------800
Mass fraction of volatiles, wt. %--------------- ≤ 1.3
Mass fraction of ash, wt. % ---------------------≤1.0
Comparable grades
DuPont, American: GW Denka, Japan: DCR-40 Lanxess, Germany: 510
Application
SN321, which is widely used in the production things of all kinds of oil, heat, fire resistance, and there are
special requirements of combination of combination of many properties, such as in the production of
mining conveyor belts, power transmission belts, hoses, cushions, seals, and wire and cable iackets, etc.