Two-component outer coating containing polyaspartic acid esters

A two-component coating composition comprising

• a) at least one polyaspartic ester-containing component A;
• b) at least one polyisocyanate component B;
• c) optionally one or more components C that are different from A and are reactive towards isocyanate groups;
• d) at least one inorganic and/or organic pigment (component D1);
• and
• optionally other auxiliaries and additives (component D2),
• wherein component A comprises
• one or more polyaspartic esters of the general formula (I)
• in which
• X is an m-valent organic radical, optionally containing one or more heteroatoms, as can be obtained by removing the primary amino groups from a corresponding polyamine that has (cyclo) aliphatically or araliphatically attached amino groups and is in a molecular weight range from 60 to 6000 g/mol, and which may contain further functional groups that are reactive towards isocyanate groups and/or inert at temperatures of up to 100° C.,
• R1 and R2 are identical or different organic radicals each having 1 to 18 carbon atoms,
• m is an integer>1,
• and one or more polyaspartic esters having a primary amino group that are of the general formula (II)
• in which
• n is m−1,
• X and radicals R1 and R2 have the meanings defined above,
• wherein the proportion of compound(s) of the formula (II) in component A is 4 to 20% of a total area measured as area % in the gas chromatogram (GC), wherein the total area corresponds to a sum of the areas in the GC of compounds of the two general formulas (I) and (II) and is equal to 100%.