| abstract |
NEW MATERIAL:Dicyclopentanetetracarboxylic acid expressed by formula I. n USE: A raw material for various resins, such as polyimide, polyester, polyamide and epoxy resins, plasticizers and resin modifying agents. n PREPARATION: An adduct of maleic anhydride with dicyclopentadiene (a compound expressed by formula II) or the corresponding hydrous acid obtained by hydrolysis in the presence of water or both are subjected to oxidative cleavage with hydrogen peroxide in the presence of one or two or more catalysts selected from the group consisting of tungstic acid, molybdic acid and heteropoly acids thereof to afford the aimed dicyclopentanetetracarboxylic acid compound formula I. n COPYRIGHT: (C)1988,JPO&Japio |