| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a simple production method using a radiation, of a novel polar petroleum resin having an excellent quality.SOLUTION: In a production method of a polar petroleum resin, a radiation is irradiated to a petroleum resin in the presence of oxygen. In the production method of the polar petroleum resin, the bromine number of the petroleum resin is 20-50 (Brg/100 g), and the total dose of the radiation is 20-75 kGy.</p> |
