NEW ALLYL-BASED OLIGOMER HAVING EXCELLENT IMPACT RESISTANCE

PURPOSE:To obtain the title oligomer providing cured materials, having excellent strength, heat resistance, a specific molecular weight, and iodine value by reacting an aromatic dicarboxylic acid diallyl ester with a polyol and an aliphatic dicarboxylic acid diallyl ester in the presence of an ester exchange catalyst under a specific condition. CONSTITUTION:A raw material comprising (A) an aromatic dicarboxylic acid diallyl ester shown by formula I (Ar is 1,2-1,3- or 1,4 phenylene, etc.), (B) a polyol shown by formula II [Z is 2-20 organic residue of polyol containing (X+1)((x) is 1-8) hydroxyl groups and (C) an aliphatic dicarboxylic acid diallyl ester shown by formula III ((n) is 3-16) is reacted in mol fraction shown by formula IV ((a) and (c) are mol fractions of the components A and c) and formula V ((b) is mol fraction of component B) in the presence of an ester exchange catalyst, and allyl alcohol is distilled away to give an oligomer having 500-50,000, calculated as polystyrene, of number-average molecular weight (Mn) by GPC method, 1,000-200,000 weight-average molecular weight (Mw), being the ratio of Mw/Mn of 1.20-40.0 and 100-150 unsaturation degree shown by iodine value of Wis method and containing terminal allyl ester.