| 摘要 |
PURPOSE:To obtain the titled resin of low cost and high heat resistance, useful for adhesives, etc., by reaction on heating between heavy oil or pitch each with specific physical properties and oxygen-contg. aromatic hydrocarbon- formaldehyde resin as a crosslinking agent in the presence of an acid catalyst. CONSTITUTION:The objective resin can be obtained by reaction an heating between (A) either coal-or petroleum-based heavy oil or pitch with an aromatic hydrocarbon fraction fa-value >=0.6 and aromatic ring hydrogen amount Ha- value >=30% and (B) an oxygen-contg. aromatic hydrocarbon-formaldehyde resin derived from reaction between (i) an aromatic hydrocarbon and (ii) formaldehyde in the presence of (iii) an acid catalyst (e.g. sulfuric acid) in the presence of (C) an acid catalyst (e.g. toluenesulfonic acid).
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