| 摘要 |
Epoxy resin mixtures, in particular for the production of prepregs with a lo ng 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 o r naphthyl, arylene is in each case unsubstituted or substituted phenylene or naphthylen e, and Q- is SbF6-, AsF6- or SbF5OH-, and (c) a stabiliser selected from certain aromatic amines having one to four NH 2 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.
|
