| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a softener for a rubber, which is capable of satisfying the PCA standard without causing oil bleeding and lowering the physical vulcanized rubber properties of a rubber composition and is capable of corresponding to the future 8 PAHs standard. <P>SOLUTION: The rubber softener comprises a raffinate obtained by subjecting the mixture of a naphthene vacuum distillation residual oil and a naphthene vacuum fraction to solvent extraction. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
