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.
Properties and Characteristics
SN239, which has the highest Mooney viscosity among the SN23-series and has the same properties as SN238. An outstanding characteristics of this grade has excellent cohesion, in the production , vulcanizate maintains its goods physical properties when a large amount of fillers and oils are added . It has a medium rate of crystallization and goods solubility, can regulate the adhesive tack to keep a time and improve heat resistance. It has the same processability as Dupont WHV of the United States.
A correlation of SN232 with Major Competitive Grades
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.
|TYPICAL POLYMER PROPERTIES|
|Appearance:||White or grew chips, with talcum as a release agent, no mechanical impurities|
|Mooney viscosity ML(1+4)100℃||34-41|
|Mooney scorch MSt5||min.||12|
|Module at 500% elongation (MPa)||4-8|
|Tensile Strength (MPa)||min.||13|
|Ultimate elongation (%)||min.||650|
|Mass fraction of volatiles (wt.%)||max.||0.8|
|Mass fraction of ash (wt.%)||max.||1.0|