The use of curable mixtures comprising;(A) at least one phosphonic diester and/or at least one diphosphonic diester and(B) at least one compound containing at least two condensable silane groups,as coupling agents, particularly as coupling agents in laminates comprising at least one substrate, at least one coating, at least one adhesive layer, and at least one sheet, and also a new process for producing such laminates using the coupling agents, the laminates which are producible using the coupling agents, and thermally curable mixtures comprising the coupling agents and at least one thermally curable polyester (C).
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