Use of tin catalysts for the production of polyurethane coatings

A polyisocyanate polyaddition product obtained from

• a) at least one aliphatic, cycloaliphatic, araliphatic and/or aromatic polyisocyanate,
• b) at least one NCO-reactive compound,
• c) at least one thermolatent inorganic tin-containing catalyst,
• d) optionally further catalysts and/or activators other than c),
• e) optionally fillers, pigments, additives, thickeners, antifoams and/or other auxiliary substances and additives,
• wherein the ratio of the weight of the tin from component c) and the weight of component a) is less than 3000 ppm when component a) is an aliphatic polyisocyanate and less than 95 ppm when component a) is an aromatic polyisocyanate,
• wherein the thermolatent inorganic tin-containing catalyst comprises compounds of formula I, II or III:
• where n>1,
• where n>1,
• wherein:
• D represents —O—, —S— or —N(R1)-
• wherein R1 represents a saturated or unsaturated, linear or branched, aliphatic or cycloaliphatic or an aromatic or araliphatic radical having up to 20 carbon atoms, which can optionally contain heteroatoms from the group oxygen, sulfur, nitrogen, or represents hydrogen or the radical
• or R1 and L3 together represent —Z-L5-;
• D* represents —O— or —S—;
• X, Y and Z represent identical or different radicals selected from alkylene radicals of the formulae —C(R2)(R3)-, —C(R2)(R3)-C(R4)(R5)- or —C(R2)(R3)-C(R4)(R5)-C(R6)(R7)- or ortho-arylene radicals of the formulae
• wherein R2 to R11 independently of one another represent saturated or unsaturated, linear or branched, aliphatic or cycloaliphatic or aromatic or araliphatic radicals having up to 20 carbon atoms, which can optionally contain heteroatoms from the group oxygen, sulfur, nitrogen, or represent hydrogen;
• L1, L2 and L5 independently of one another represent —O—, —S—, —OC(═O)—, —OC(═S)—, —SC(═O)—, —SC(═S)—, —OS(═O)2O—, —OS(═O)2— or —N(R12)-,
• wherein R12 represents a saturated or unsaturated, linear or branched, aliphatic or cycloaliphatic or an aromatic or araliphatic radical having up to 20 carbon atoms, which can optionally contain heteroatoms from the group oxygen, sulfur, nitrogen, or represents hydrogen;
• L3 and L4 independently of one another represent —OH, —SH, —OR13, -Hal, —OC(═O)R14, —SR15, —OC(═S)R16, —OS(═O)2OR17, —OS(═O)2R18 or —NR19R20, or L3 and L4 together represent -L1-X-D-Y-L2-,
• wherein R13 to R20 independently of one another represent saturated or unsaturated, linear or branched, aliphatic or cycloaliphatic or aromatic or araliphatic radicals having up to 20 carbon atoms, which can optionally contain heteroatoms from the group oxygen, sulfur, nitrogen, or represent hydrogen.