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Product Group
Chloroprene Rubber

SNR239

Addtime: 2017-6-26

 SURPREN TM SNR239

Introduction
Chloroprene rubber SNR239 is a general purpose, it is obtained by mercaptan modified and Chloroprene monomer by emulsion polymerization with medium rate of crystallization. It can be seen as an equivalent to Dupont WHV of the United States.

Characteristics

l  Has the highest Mooney viscosity of the SNR23- series and the same properties as SNR238;

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

SNR239

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

SNR239, 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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