Aldimines based on 2-methyl-1,5-pentane diamine and their use for the production of polyurea coatings

摘要

The present invention relates to aldimines corresponding to the formula X1-ÄN=CHCH(R1)(R2)Ü2 wherein X1 represents the group obtained by the removal of the amino groups from 2-methyl-1,5-pentane diamine, R1 and R2 may be the same or different and represent optionally substituted hydrocarbon radicals, or R1 and R2 together with the beta -carbon atom from a cycloaliphatic or heterocyclic ring. The present invention relates to a clear, solvent-containing coating composition which contains a) an isocyanurate group-containing polyisocyanate which contains less than 5% by weight, based on the weight of component a), of allophanate and uretdione groups and b) an aldimine corresponding to the formula X1-ÄN=CHCH(R1)(R2)Ün wherein X1, R1 and R2 are as previously defined and c) 10 to 200% by weight, based on the weight of components a), b) and c), of a organic solvent containing only ester groups, wherein components a) and b) are present in an amount sufficient to provide an equivalent ratio of isocyanate groups to aldimine groups of 0.5:1 to 20:1.