| 摘要 |
PROBLEM TO BE SOLVED: To provide a resin composition excellent in dispersion stability of silica powder in the resin composition and high in moldability by using a silica powder in a specified surface state, measured by pulse NMR.SOLUTION: In a surface-modified silica powder, the distribution of transverse relaxation times T2, measured by pulse NMR under the following conditions, has a ratio of 15-35% and a relaxation time of 450-580 μs in the long-time region of 200 μs or longer. Conditions for measurement: apparatus, JEOLMu25; JEOLMu25 nuclide;H measurement; T2 pulse width; solid echo method; pulse width, 2.2 μs; cumulative number, 8.0 μs; temperature, 35°C; sample quantity, 1.0 g; and repeating time, 4.0 s. |
