| abstract |
The invention relates to a composition comprising an at least bifunctional acidic prepolymer (A) curable under the action of heat and a compound of the formula (I) in which A is a mono- to tetravalent, saturated or unsaturated alkyl group having 1 to 60 carbon atoms, a mono- to tetravalent aryl group, a mono- or dialkylamino group having 1 to 4 carbon atoms, an alkenylene group having 2 to 4 carbon atoms, a carboxyalkylene group or an alkoxycarbonylalkylene group having 1 to 4 carbon atoms, n is 1 or 2, m is 2-n, q is a number from 0 to 3, R1 is hydrogen or an alkyl group having 1 to 5 carbon atoms or a hydroxyalkyl group having 1 to 5 carbon atoms and X is a radical of the formula in which R?3 and R4¿ are identical or different and, independently of one another, are hydrogen, a straight-chain or branched alkyl group or hydroxyalkyl group having 1 to 5 carbon atoms, or R?3 and R4¿, together with the carbon atom to which they are bonded, form a cycloaliphatic ring. The composition is suitable for the production of printed circuits. |