COATING COMPOSITION COMPRISING AN OXAZOLIDINE FUNCTIONAL COMPOUND AND AN ISOCYANATE FUNCTIONAL COMPOUND COMPRISING A URETDIONE AND/OR ALLOPHANATE STRUCTURE

摘要

The invention relates to a coating composition comprising a) at least one oxazolidine functional compound of formula (I) wherein x and y are independently selected from 0 to 10, with the proviso that x and y cannot both be 0; n is selected from the integers 2 or 3; m and p are independently selected from the integers 1 or 2; R1, R2, R3, R4, R5 and R6 may be the same or different and are selected from the group of hydrogen, linear or branched (cyclo)alkyl, and linear or branched aryl, optionally substituted; R1 and R2, R3 and R4, and R5 and R6 may be joined together to form a 5 or 6 carbon ring with the attached carbon atom of the ring in the formula, i.e. R1 and R2, R3 and R4, and R5 and R6 collectively represent a tetramethylene or a pentamethylene group; and R7 is a mono- or multivalent aliphatic, aromatic, arylaliphatic or cycloaliphatic moiety which may optionally contain oxygen, nitrogen, sulphur, and silica, and R7 may be H when x or y is zero; and b) at least one isocyanate functional compound comprising a uretdione and/or an allophanate structure; wherein at least 20 wt% of compounds comprising NCO-reactive groups consists of the oxazolidine functional compound of formula (I). The invention further relates to a method of coating which comprises said coating composition being applied to a substrate and to a coated substrate, in particular cars and large transport vehicles.