Patent ID: 6921842

Claim:
A hydrogenated aromatic oligomer represented by the following general formula (1) (A-F) n -A (1) wherein A is a segment comprising mainly a polycyclic aromatic compound or a hydrogenated polycyclic aromatic compound, and a phenol or a hydrogenated phenol, and comprising at least partly a hydrogenated polycyclic aromatic compound and/or a hydrogenated phenol, F is methylene or dimethylene ether, and n is a number of 2-20, wherein the hydrogenated aromatic oligomer is derived from a reaction comprising a formaldehyde or a derivative thereof, a polycyclic aromatic compound, and a phenol, wherein (i) the ratio of formaldehyde or derivative thereof divided by the sum of polycyclic aromatic compound (excepting phenols) and phenol is 0.2-0.6 on a mole basis and (ii) the ratio of phenol divided by polycyclic aromatic compound (excepting phenols) is 0.2-0.5 on a weight basis, and wherein the hydrogenated aromatic oligomer comprises a number average molecular weight in the range of 300-1,000, and a weight average molecular weight in the range of 500-2000.