| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.23 ( October 1990 ) R&D of High-Technology Research Laboratories, Commemorating the 20th Anniversary of the Technical Research Division ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| Production Process and Characteristics of Styrene Oligomers Yoshihiro Naruse, Masahiko Kajioka, Seiji Yamamoto |
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Synopsis : As a new product in the chemical field, the authors have developed styrene oligomers, KSTO, which are different form conventional ones both in average molecular weight and the degree of unsaturation. The technical base is a new application of a solid acid catalyst, Nafion-H supplied by Du Pont, to bulk polymerization of styrenes. The number-average molecular weight of KSTO is between 250 and 800, and the iodine value ranges from 20 to 70. KSTO is clean, faint both in color and odor, and harmless. Owing to its high compatibility with other resins and good dielectric properties, KSTO can be widely used as a modifier of polymers and a UV coating material. Furthermore, a functional group can be introduced to these oligomers because of their olefinic double bond, and as a result, a new application such as a high performance epoxy resin hardener is expected. |
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