Bismaleimide compounds

摘要

PCT No. PCT/AU93/00248 Sec. 371 Date Jan. 5, 1995 Sec. 102(e) Date Jan. 5, 1995 PCT Filed May 27, 1993 PCT Pub. No. WO93/24488 PCT Pub. Date Dec. 9, 1993The invention relates to a bismaleimide compound of the formula (I) substantially free of oligomeric, amidic and uncyclized impurities: <IMAGE> (I) wherein Ar is an optionally substituted aromatic residue; and Ar' is an optionally substituted aromatic residue which provides either good conjugation between the nitrogen-containing groups shown in formula (I) or steric or other restrictions capable of moderating the reactivity of an unreacted amine moiety attached to said residue, methods for their preparation and curable compositions containing them. The curable compositions may also be used in impregnated fibre reinforced materials and advanced composite materials.