| 摘要 |
PURPOSE:To obtain a composition which can easily give a carbonized product to a uniform and fine optical structure by carbonization, by homogeneously mixing a tar pitch powder with a cured phenol resin powder of a specified particle diameter. CONSTITUTION:A composition formed by homogeneously mixing 40-95wt.% tar pitch powder with 5-60wt.% cured phenol resin powder of a particle diameter <=300mum. When the tar pitch powder used has a particle diameter >300mum, it sometimes happens that it is sufficiently mixed with the phenol resin powder. As the means for forming a powder of particle diameter<=300mum, grinding with a grinder or freeze drying of an organic solvent-soluble component such as benzene (in the case where finer powder is desirable) is adopted. The mixing of the tar pitch powder with the cured phenol resin powder can be simply performed by mechanically mixing them without using any solvent or the like. |
