NBRに対する芳香族炭化水素ホルムアルデヒド樹脂の添加効果

概要

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Aromatic hydrocarbon-formaldehyde resin (AF resin) was evaluated as a compounding ingredient for acrylonitrile butadiene rubbers (NBRs) containing white carbon for its plasticizing performances and physical properties in comparison with those of di-octylphthalate (DOP).From properties measured on AF resin-mixed NBR compounds, the AF resin was found to work as a plasticizer.The AF resin was found to provide vulcanized NBRs with higher tensile and tear strength, and lower compression set than DOP.By the addition of AF resin, the resilience of vulcanized NBRs decreased at room temperature to approximately a half of that of DOP. The performance found in the measurement of viscoelastic properties was explained by increased value of loss tangent (tan δ) but only a little drop of glass transition temperature of valucanized NBRs with the addition of AF resin.
日本ゴム協会の論文