Chloroprene rubber SN238
Blue Star TM SN238
Introduction
Chloroprene rubber SN238 is a general purpose, it is obtained by mercaptan modified and Chloroprene
monomer by emulsion polymerization with medium rate of crystallization, for using a Nairit recipe and
process technology. It can be seen as an equivalent to Dupont WHV-100 of the United States.
Characteristics The same properties as SN231 and SN232 except for its higher Mooney viscosity;
Excellent cohesion, in the production, vulcanizate maintains its good physical properties when a large
amount of fillers and oils are added;
Medium rate of crystallization and good solubility, can regulate the adhesion tack to keep a time and
improve heat resistance;
The same processability as Dupont WHV-100 of the United States.
Appearance
White or grey chips, with talcum as a release agent, no mechanical impurities.
Typical property
Item SN238
Mooney viscosity ML (1+4) 100 ºC 90 - 110
Mooney scorch, MSt5, min ≥ 12
Module at 500% elongation, MPa 4 - 8
Tensile strength, MPa ≥ 13
Ultimate elongation, % ≥ 650
Brookfield solution viscosity (MPa.s, 5% toluene solution
at 25°C)
30 - 65
Mass fraction of volatiles, wt. % ≤ 0.8
Mass fraction of ash, wt. % ≤ 1.0
Comparable grades
DuPont, American: WHV-100
Denka, Japan: M-100
Lanxess, Germany: 230
Application
SN238, which is mainly suitable for production goods of highly loading, is used in the form of a blend with
the grades of adhesive to preparing adhesive cement. Production things of extruded bars, a variety of
hoses, tapes, rubber seals, as well as hard goods and wire and cable jackets, etc.
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