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Product Group
Chloroprene Rubber

SN321

Addtime: 2017-6-26

 SURPREN TM SN321

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

l  Good properties of physical mechanics and plastication;

l  Under mechanical shear, Breakdown of SN321 molecular chain is weaker than SN12- series, is stronger than SN12-  series in the thermal stability;

l  Better compatibility in combination with other types;

l  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;

l  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;

l  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.

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