Tris-(cyanato)-s-triazines and anisotropic duroplastic...

C - Chemistry – Metallurgy – 07 – D

Patent

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Details

C07D 251/34 (2006.01) C08G 73/06 (2006.01) C09K 19/34 (2006.01) C09K 19/38 (2006.01)

Patent

CA 2169855

Described are tris-(cyanato)-s-triazines of formula (I) in which R1 and R2 are each independently of each other, halogen, hydrogen or a methyl or ethyl group, plus a method for the preparation of anisotropic duroplastic networks by the melt-polycyclotrimetrization of polycyanates present as liquid-crystal tris-(cyanato)-s-triazines of formula (I) of claim 1, optionally in the presence of catalysts, comonomers and other commonly used additives. Also includes in the invention are anosotropic duroplastic networks obtained by this method. Such networks exhibit an E-modulus which is superior to that of comparable prior art products.

L'invention concerne des tris-(cyanato)-s-triazines de formule (I), dans laquelle R1 et R2 désignent chacun, indépendamment l'un de l'autre, halogène, hydrogène ou un reste méthyle ou éthyle. L'invention concerne également un procédé de production de structures réticulaires thermoplastiques anisotropes par polycyclotrimérisation de polycyanates dans la matière en fusion, éventuellement en présence de catalyseurs, de comonomères et d'autres additifs classiques, les polycyanates étant polycyclotrimérisés sous forme de tris-(cyanato)-s-triazines à cristaux liquides de la formule (I) donnée dans la revendication 1. L'invention concerne par ailleurs une structure réticulaire thermoplastique anisotrope réalisée d'après ledit procédé. Comparativement à des produits similaires correspondant à l'état antérieur de la technique, cette structure réticulaire présente un meilleur module d'élasticité.

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