| 摘要 |
PURPOSE:To provide the titled composition capable of giving elastomer of high rigidity, low specific gravity and low resilience along with such characteristics so as to be excellent in touch and suitable for golf grip etc., comprising polynorbornene, oil, specific unsaturated carboxylic acid, and magnesium ion. CONSTITUTION:The objective composition can be obtained by incorporating (A) 100pts.wt. of polynorbornene with (B) 60-220pts.wt. of an oil compatible therewith (e.g. aromatic, or naphthene-based one) and (C) 10-40pts.wt. of 3-8C alpha,beta- monoethylenic unsaturated carboxylic acid (e.g. acrylic acid, methacrylic acid) followed by graft polymerization on heating in the presence of such an amount of magnesium ion as to be equivalent or lower based on the existing carboxylic acid group. |
