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SNR238

Addtime:2013-2-18

 SURPREN TM SNR238

Introduction
Chloroprene rubber SNR238 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

l  The same properties as SNR231 and SNR232 except for its higher Mooney viscosity;

l  Excellent cohesion, in the production, vulcanizate maintains its good physical properties when a large amount of fillers and oils are added;

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

l  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

SNR238

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)

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

SNR238, 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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