Patent ID: 6169186
Filing Date: 2001-01-02
Classification: C07D,C08F,C08G,C09K

Abstract:
A bismaleimide comprising a mesogenic group, characterised in that it consists, corresponding to (I), of two reactive terminal maleimide groups which are linked via linear or singly alkyl-substituted alkylene chains A, which are linked to an aromatic mesogen M via ester, amide or ether groups, ##STR21## wherein A independently represents an alkylene chain comprising 3 to 20 CH.sub.2 groups, wherein one C atom of each alkylene chain A may be chiral due to alkyl substitution, X independently represents --C(O)O--, --C(O)NH-- or --O--, and M represents a mesogen consisting of at least two rings, which are linked para to each other by single bond, --CH.sub.2 --CH.sub.2 --, --CH.dbd.CH--, --C.dbd.C--, --COO--, CONH--, --C(CH.sub.3.dbd.CH--, --CH.dbd.N--, --CH.dbd.N--N.dbd.CH--, --N.dbd.N-- or --N(O).dbd.N-- groups, and which may be mono- or di-substituted by alkyl groups, wherein the terminal aromatic rings are each substituted in the para position to these linking groups by an O or NH group of X, and R independently represents an H atom, an alkyl group comprising 1 to 8 C atoms, a phenyl ring or a halogen atom.