| abstract |
A vinyl polymer powder, a curable resin composition including the vinyl polymer powder and a cured product of the curable resin composition are provided. The vinyl polymer powder is characterized as follows: excellent dispersibility in the curable resin composition, rapidly turning the curable resin composition into a gel state by means of short-time heating under a predetermined temperature, low ion concentration, and serving as a pregel agent suitable for an electronic material field for the resultant cured product expressing an outstanding electrical property. The vinyl polymer powder of the present invention has an acetone-soluble ingredient greater than or equal to 30 wt%, average molecular weight of the acetone-soluble ingredient greater than or equal to 100, 000, the content of alkali metal ion less than or equal to 10 ppm, and volume average primary particle diameter (Dv) greater than or equal to 200 nm. |