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Product Group
Chloroprene Rubber

SN239

Addtime: 2017-6-26

 SURPREN 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

l  Has the highest Mooney viscosity of the SN23- series and the same properties as SN238;

l  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;

l  A medium rate of crystallization and good solubility, can regulate the adhesive tack to keep a time and improve heat resistance;

l  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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