| abstract |
The present invention relates to a method for applying a two-component polyurethane composition by means of 3D printing, comprising the steps: - providing a pumpable first component A, comprising at least one polyol, which has an OH functionality in the range of 1.5 to 4 and an average molecular weight (number average) Mn in the range of 250 to 15000 g/mol, preferably at least one diol, which has two hydroxyl groups, which are linked by means of a C2 to C9 carbon chain, and at least one compound T, which has at least one thiol group; - feeding a pumpable second component B into the mixing region of the continuous mixer, the second component B comprising at least one polyisocyanate, wherein: in one of the two components A and B, additionally at least one metal catalyst for the reaction of hydroxyl groups and isocyanate groups is contained, which metal catalyst can form thio complexes, and the molar ratio of all the thiol groups of the at least one compound T to all the metal atoms of the at least one metal catalyst is between 1:1 and 250:1. |