C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 63/00 (2006.01) B32B 27/04 (2006.01) B32B 27/12 (2006.01) C08G 59/18 (2006.01) C08G 59/68 (2006.01)
Patent
CA 2065181
Epoxy resin mixtures, in particular for the production of prepregs with a long shelf life Curable mixtures comprising (a) an epoxy resin, (b) a sulfonium salt of the formula (I), (II), (III) or (IV) (see formula I,II,III,IV) in which, in the formulae (I) to (IV), A is C1-C12alkyl, C3-C8cycloalkyl, C4-C10cycloalkylalkyl, or unsubstituted or substituted phenyl, Ar, Ar1 and Ar2, independently of one another, are each unsubstituted or substituted phenyl or naphthyl, arylene is in each case unsubstituted or substituted phenylene or naphthylene, and Q- is SbF6-, AsF6- or SbF5OH-, and (c) a stabiliser selected from certain aromatic amines having one to four NH2 groups with certain substituents in the ortho-position to each amino group, with the proviso that no amino group is substituted in both ortho-positions by halogen, or with a selected ortho- or para-substituent to each amino group, or selected from bipyridines, where 0.1- 10% by weight of component (b) and 0.02-5% by weight of component (c), based on the epoxy resin (a), are present in the mixtures. They are particularly suitable for the production of prepregs which have a long shelf life, are rapidly thermocurable and can be pressed to give laminates having excellent properties.
Haug Theobald
Muller Beat
Roth Martin
Ag Ciba-Geigy
Fetherstonhaugh & Co.
Vantico Ag
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