Liquid-applied waterproofing membrane for roofs comprising a trialdimine

A one-part moisture-curing liquid-applied waterproofing membrane comprising:

• at least one isocyanate-functional polyurethane polymer;
• at least one trialdimine of the formula (I),
• wherein
• A is a trivalent hydrocarbyl moiety of molecular weight in the range of 380 to 5000 g/mol containing ether groups,
• R1 and R2 are the same or different C1 to C12 linear or branched alkyls, or are joined together to form a divalent linear or branched C4 to C12 hydrocarbyl moiety which is part of a 5- to 8-membered carbocyclic ring,
• R3 is hydrogen or a linear or branched C1 to C12 alkyl or arylalkyl or alkoxycarbonyl, and
• R4 and R5 are the same or different linear or branched C1 to C20 alkyl or cycloalkyl or aralkyl optionally containing ether groups, or are joined together to form a divalent linear or branched C4 to C12 hydrocarbyl moiety which is part of a 5- to 8-membered heterocyclic ring which, besides the nitrogen atom, may contain an ether or thioether or tertiary amino group;
• and
• at least one dialdimine;
• wherein the ratio between the number of the aldimino groups of the trialdimine and the number of aldimino groups of the dialdimine is in the range of 90/10 to 40/60,
• wherein the at least one trialdimine of the formula (I) increases the cure speed of the one-part moisture-curing liquid-applied waterproofing membrane.