| 摘要 |
NEW MATERIAL:A diamine shown by the formula (X is >C=0 or >SO2). EXAMPLE:4,4'-Bis[3-(4-imino-alpha-alpha'-dimethylbenzyl)phenoxy]diphenyl ketone. USE:Useful as a raw material for heat-resistant resins and a curing agent for epoxy resins. Polyimides obtained by using the diamine are soluble in organic solvents and show a low-softening point. PREPARATION:A 4,4'-dihalogenobenzophenone or a 4,4'- dihalogenodiphenylsulfone is reacted with 2-(3-hydroxyphenyl)-2-(4'-aminophenyl) propane in the presence of a base in an aprotic solvent (e.g., N-methyl-2- pyrrolidone is used and amount of solvent used is 1-10 times as much as raw material) at 100-250 deg.C, preferably 120-200 deg.C to give a compound shown by the formula. |
