| 摘要 |
<p>Hydrocarbon resins compatible with wax and ethylene-vinyl acetate copolymers and with a satisfactory softening point useful in hot melt adhesives are prepared by polymerising in the presence of a Friedel-Crafts catalyst-5 to 30 parts by weight of vinyl toluene, 15 to 45 parts by weight of styrene and 40 to 70 parts by weight of alpha-methyl styrene.</p> |
