Chloroprene rubber SN239
Blue Star TM SN239
Introduction
Chloroprene rubber SN239 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 of the United States.
Characteristics Has the highest Mooney viscosity of the SN23- series and the same properties as SN238;
An outstanding characteristics of this grade has excellent cohesion, in the production, vulcanizate
maintains its good physical properties when a
large amount of fillers and oils are added;
A medium rate of crystallization and good solubility, can regulate the adhesive tack to keep a time and
improve heat resistance;
The same processability as Dupont WHV of the United States.
Appearance
White or grey chips, with talcum as a release agent, no mechanical impurities.
Typical property
Item SN239
Mooney viscosity ML (1+4) 100 ºC 111 - 130
Mooney scorch MSt5, min ≥ 12
Module at 500% elongation, MPa 4 - 8
Tensile strength, MPa ≥ 13
Ultimate elongation, % ≥ 650
Mass fraction of volatiles, wt. % ≤ 0.8
Mass fraction of ash, wt. % ≤ 1.0
Comparable grades
DuPont, American: WHV
Lanxess, Germany: 243
Application
SN239, 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 cements. 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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