Aromatic bismaleimides and prepreg resins therefrom

Abstract From the Canadian patent

Described herein are novel bismaleimides and prepregable resin compositons comprising these bismaleimides and one or more liquid coreactants and optionally, one or more other additives. The novel bismaleimides, such as alpha, alpha-bis-(4-maleimidophenyl)-mets-diisopropylbenzene, are characterized by the presence of three aromatic rings in the molecular structure and in some respects optimize the desirable characteristics of the one or two and four atomatic ring-containing bismaleimides in resins prepared therefrom. In particular this, invention is directed to novel aromatic bismaleimides of formula (II), II, and prepreg resins prepared therefrom. The novel bismalemides are those wherein Ar …