Abstract: The present invention relates to a multi-aziridine crosslinker composition, characterized in that the multi-aziridine crosslinker composition is an aqueous dispersion having a pH ranging from 8 to 14 and comprises a multi-aziridine compound in dispersed form, wherein said multi-aziridine compound has: a. from 2 to 6 of the following structural units A: whereby R1 is H, R2 and R4 are independently chosen from H or an aliphatic hydrocarbon group containing from 1 to 4 carbon atoms, R a is an aliphatic hydrocarbon group containing from 1 to 4 carbon atoms, m is 1, b. one or more linking chains wherein each one of these linking chains links two of the structural units A; and c. a molecular weight in the range from 500 to 10000 Daltons wherein the molecular weight is determined using MALDI-TOF mass spectrometry according to the description.

Abstract: The present invention relates to a multi-aziridine crosslinker composition, characterized in that the composition is an aqueous dispersion having a pH ranging from 9 to 14 and comprising a multi-aziridine compound in dispersed form, wherein said multi-aziridine compound has: a. from 2 to 6 of the following structural units A: (A) whereby R1, R2, R3 and R4 are H; m is 1, R? and R? are according to (1) or (2): (2) R??H or an aliphatic hydrocarbon group containing from 1 to 14 carbon atoms, and R?=an alkyl group containing from 1 to 4 carbon atoms, CH2-O—(C?O)—R?? or CH2-O—R??, whereby R?? is an alkyl group containing from 4 to 12 carbon atoms and R?? is an alkyl group containing from 1 to 14 carbon atoms, (2) R? and R? form together a saturated cycloaliphatic hydrocarbon group containing from 5 to 8 carbon atoms; b. one or more linking chains wherein each one of these linking chains links two of the structural units A; and c. a molecular weight in the range from 600 to 10000 Daltons.