PURPOSE: To obtain the titled resin useful as, e.g., a raw material for carbon composites, good in shape retentivity in its carbonization, by incorporating mesophase pitch with a specific plasticizer and carrying out a reaction on melting of the resultant blend with a crosslinking agent comprising hydroxymethyl group-contg. aromatic compound.
CONSTITUTION: First, mesophase pitch of a softening point ≥230°C as the raw material is incorporated with, as the plasticizer, a polycyclic aromatic compound of a softening point ≤180°C and fa value ≥0.9 or a mixture with said aromatic compound predominant. Thence, the resultant blend and a crosslinking agent comprising a second aromatic compound having at least two hydroxymethyl or halomethyl groups are allowed to react on melting at ≤220°C in the presence of an acid catalyst such as p-toluenesulfonic acid, thus obtaining the objective resin. Said plasticizer and crosslinking agent are preferably naphthalene and di(hydroxymethyl)benzene, respectively.
OKADA SHINICHI
HASEBE YOSHIAKI
ARAI TOMIO
FUJI SEKYU KK
FUJI STANDARD RES INC