Patent Number: 6,169,186

Title: Bismaleimides comprising mesogenic groups

Abstract: The invention relates to bismaleimides comprising mesogenic groups which consist, 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, ##STR1## wherein A, X, M and R are as defined in the specification. The invention, moreover, relates to oligomeric liquid crystalline bismaleimides of general formula (II) ##STR2## wherein A, X, M and R are as defined above, n represents and integer from 1 to 100 and B represents piperazinyl or a divalent radical which is derived from a primary or secondary para-substituted cyclic diamine, wherein B is bonded via the amino groups of the diamine. The invention also relates to methods of producing said bismaleimides.

Inventors: Imai; Masaru (Gunma, JP), Frings; Rainer B. (Berlin, DE), Grahe; Gerwald F. (Berlin, DE), Kawamura; Joji (Chiba, JP), Obi; Naoki (Tokyo, JP)

Assignee: Dainippon Ink and Chemicals, Inc.

International Classification: C07D 207/452 (20060101); C07D 207/00 (20060101); C08F 290/14 (20060101); C08F 290/00 (20060101); C08F 290/04 (20060101); C08G 73/00 (20060101); C08G 73/12 (20060101); C09K 19/38 (20060101); C07D 403/12 (); C09K 019/08 ()

Expiration Date: 01/02/2018