Heat curable epoxy compositions

C - Chemistry – Metallurgy – 08 – G

Patent

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C08G 59/68 (2006.01) H05K 3/28 (2006.01)

Patent

CA 2337393

Heat curable compositions comprising: (A) at least one compound which is capable of undergoing cationic polymerisation; (B) at least one quaternary ammonium salt of an aromatic-N-heterocyclic cation and of a non-nucleophilic anion; (C) at least one 1,1,2,2-substituted-1, 2-ethane-diol and/or a derivative thereof, and (D) optionally further additives; and wherein said component (C) is a compound of formula (I), wherein each of R1, R2 and R3 independently of the other is unsubstituted phenyl or has one of the meanings of R4; R4 is substituted phenyl optionally substituted .alpha.-naphthyl or .beta.-naphthyl, or an optionally substituted aromatic heterocyclic ring system or each of R1 and R2 and/or R3 and R4 independently of the other form a residue of formula (II), wherein each of R5 and R6 independently of the other is hydrogen or (C1-C4)alkyl; R7 is -(CH2)n- or -S- or -O-; and n is 0, 1, 2 or 3.

L'invention concerne des compositions thermodurcissables renfermant: (A) au moins un composé pouvant être soumis à une polymérisation cationique; (B) au moins un sel d'ammonium quaternaire d'un cation aromatique-N-hétérocyclique et d'un anion non nucléophile; (C) au moins un 1,1,2,2-substitué-1,2-éthane-diol et/ou un dérivé de celui-ci, et (D) éventuellement d'autres additifs; ledit constituant (C) étant un composé représenté par la formule (I), dans laquelle chaque R¿1?, R¿2? et R¿3?, indépendamment de l'autre, est un phényle non substitué ou possède l'une des notations de R¿4?; R¿4? est un phényle substitué, éventuellement substitué par un .alpha.-naphtyle ou un .beta.-naphtyle, ou un noyau hétérocyclique aromatique éventuellement substitué, ou chaque R¿1? et R¿2? et/ou R¿3? et R¿4? forme, indépendamment de l'autre, un résidu représenté par la formule (II). Dans cette formule, chaque R¿5? et R¿6?, indépendamment de l'autre, est hydrogène ou alkyle en C¿1?-C¿4?; R¿7? est -(CH¿2?)¿n?- ou S- ou -O- ; et n représente 0, 1, 2 ou 3.

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