| 摘要 |
PURPOSE:The titled resin composition excellent in heat resistance and moldability, prepared by mixing a polyepoxy compound with a specified phenol-formaldehyde resin. CONSTITUTION:Use is made of a phenol-formaldehyde resin prepared by reacting a phenol (e.g., phenol, cresol) with a formaldehyde (e.g., formalin, paraformaldehyde) in a molar ratio of 0.4-0.6, and removing the unreacted portion of the phenol. Namely, a polyepoxy compound (e.g., bisphenol-derived epoxy resin) is mixed with the above phenol-formaldehyde resin in an eq. ratio of epoxy groups in component A to hydroxyl groups in component B of about 0.7-2. |
