Patent ID: 7449242

Claim:
A process for coating an auto body or auto part which comprises applying a base coating of a pigmented coating composition to a substrate; applying a top-coating of a clear coating over the base coating; and curing the base coating and top-coating to form a base coat/clear coat finish on the substrate, wherein the improvement comprises using as the clear top-coating, a clear coat composition which comprises a binder consisting essentially of a. polyisocyanate crosslinking agent; b. an isocyanate-reactive component having at least one compound having the following formula: wherein R is a hydrocarbon radical selected from a C 1 to C 20 linear or branched alkyl group, or a C 5 to C 16 cycloaliphatic group or is a residue obtained by removing n amino groups from a polyether polyamine with m equal to 0 having a functionality of n and a number average molecular weight of less than 600, wherein the amino groups are attached to primary carbon atoms and the ether groups are separated by at least two carbon atoms; m equals 0 to 4 an n equals on average 1 to 4; X and Y independently are O or NR 3 ; R 3 is equal to H, or C 1 to C 20 linear or branched alkyl group, a C 5 to C 16 cycloaliphatic group, or R 3 is equal to C 3 ═O if s=0, the compound is a cyclic imide; Z is selected from a C 1 to C 20 linear or branched alkyl group, a C 5 to C 16 cycloaliphatic group, or an OH-group containing linear, branched or cycloaliphatic alkyl group or Z comprises a fragment of the structure —CH 2 —CHR 4 —R 5 , with R 4 equal to H, or C 1 to C 20 linear or branched alkyl group, or a C 5 to C 16 cycloaliphatic group and R 5 equal to —CN or —C(═O)OR 6 , with R 6 equal to H, or C 1 to C 20 linear or branched alkyl group, or a C 5 to C 16 cycloaliphatic group; p and q are equal to 0 or 1, if p and q equal to 1, the —NH-Z fragment can be bound to either C 1 or C 2 , and mixtures of compounds and isomers thereof; s is equal to 0 or 1, with the proviso that s can only be 0 when p equals 1 and X═NR 3 wherein R 3 equals C 3 ═O; R 2 is H or independently selected from a C 1 to C 20 linear or branched alkyl group, or a C 5 to C 16 cycloaliphatic group; R 1 is a hydrocarbon radical obtained by removing (q+r) hydrogen atoms from a C 1 to C 20 linear or branched alkyl group, or a C 5 to C 16 cycloaliphatic group; and r is equal to 0 to 4.