| abstract |
An object of the present invention is to improve the viscoelastic properties of vulcanized rubber used in tire manufacture. Use of S- (3-aminopropyl) thiosulfuric acid and / or a metal salt thereof for improving viscoelastic properties of vulcanized rubber. Here, as a metal ion in S- (3-aminopropyl) thiosulfate metal salt, lithium ion, sodium ion, potassium ion, cesium ion, cobalt ion, copper ion or zinc ion is preferable. [Selection figure] None |