Process for the preparation of polyisocyanate polyaddition products wherein a) at least one aliphatic, cycloaliphatic, araliphatic and/or aromatic polyisocyanate, b) at least one NCO-reactive compound, c) at least one inorganic, tin-comprising catalyst which is thermolatent without the presence of protonic acids, d) optionally further catalysts and/or activators other than c), e) optionally fillers, pigments, additives, thickeners, antifoams and/or other auxiliary substances and added ingredients, and f) a protonic acid in an amount which is at least equimolar based on the catalyst mentioned under c) and not more than three-times molar based on the NCO-reactive groups from the compound from b), are reacted with one another, wherein the ratio of the weight of the tin from component c) and of the weight of component a) is less than 1000 ppm when component a) is an aliphatic polyisocyanate and less than 80 ppm when component a) is an aromatic polyisocyanate, characterized in that there are used as catalysts (c) cyclic tin compounds of formula I, II or III: where n > 1, where n > 1, wherein D represents -O-, -S- or -N(R 1)-, wherein R 1 represents a saturated or unsaturated, linear or branched, aliphatic or cycloaliphatic or an optionally substituted, aromatic or araliphatic radical having up to 20 carbon atoms, which can optionally comprise heteroatoms from the group oxygen, sulfur, nitrogen, or represents hydrogen or the radical or R 1 and L3 together represent -Z-L 5 -, and D* represents -O- or -S-, and X, Y and Z represent the same or different radicals selected from alkylene radicals of the formula -C(R 2) (R 3)-, -C(R 2) (R 3)-C(R 4) (R 5) - or-C(R 2) (R 3)-C(R 4) (R 5) -C (R 6) (R 7) - or ortho-arylene radicals of the formula wherein R 2 to R 11 independently of one another represent saturated or unsaturated, linear or branched, aliphatic or cycloaliphatic or optionally substituted, aromatic or araliphatic radicals having up to 20 carbon atoms, which can optionally comprise heteroatoms from the group oxygen, sulfur, nitrogen, or represent hydrogen, and L 1, L 2 and L 5 independently of one another represent -O-, -S-, -OC(=O)-, -OC(=S)-, -SC(=O)-, -SC (=S) -, -OS(=O) 2 O-, -OS (=O) 2 - or -N -, wherein R 12 represents a saturated or unsaturated, linear or branched, aliphatic or cycloaliphatic or an optionally substituted, aromatic or araliphatic radical having up to 20 carbon atoms, which can optionally comprise heteroatoms from the group oxygen, sulfur, nitrogen, or represents hydrogen; and L 3 and L 4 independently of one another represent - OH, -SH, -OR 13, -Hal, -OC(=O)R 14, -SR 15, -OC(=S)R 16, -OS (=O) 2 OR 17, -OS (=O) 2 R 18 or -NR 19 R 20, or L 3 and L 4 together represent -L 1 -X-D-Y-L 2 -, wherein R 13 to R 20 independently of one another represent saturated or unsaturated, linear or branched, aliphatic or cycloaliphatic or optionally substituted, aromatic or araliphatic radicals having up to 20 carbon atoms, which can optionally comprise heteroatoms from the group oxygen, sulfur, nitrogen, or represent hydrogen. a) at least one aliphatic, cycloaliphatic, araliphatic and/or aromatic polyisocyanate, b) at least one NCO-reactive compound, c) at least one inorganic, tin-comprising catalyst which is thermolatent without the presence of protonic acids, d) optionally further catalysts and/or activators other than c), e) optionally fillers, pigments, additives, thickeners, antifoams and/or other auxiliary substances and added ingredients, and f) a protonic acid in an amount which is at least equimolar based on the catalyst mentioned under c) and not more than three-times molar based on the NCO-reactive groups from the compound from b), D represents -O-, -S- or -N(R 1)-, wherein R 1 represents a saturated or unsaturated, linear or branched, aliphatic or cycloaliphatic or an optionally substituted, aromatic or araliphatic radical having up to 20 carbon atoms, which can optionally comprise heteroatoms from the group oxygen, sulfur, nitrogen, or represents hydrogen or the radical or R 1 and L3 together represent -Z-L 5 -, and D* represents -O- or -S-, and X, Y and Z represent the same or different radicals selected from alkylene radicals of the formula -C(R 2) (R 3)-, -C(R 2) (R 3)-C(R 4) (R 5) - or-C(R 2) (R 3)-C(R 4) (R 5) -C (R 6) (R 7) - or ortho-arylene radicals of the formula wherein R 2 to R 11 independently of one another represent saturated or unsaturated, linear or branched, aliphatic or cycloaliphatic or optionally substituted, aromatic or araliphatic radicals having up to 20 carbon atoms, which can optionally comprise heteroatoms from the group oxygen, sulfur, nitrogen, or represent hydrogen, and L 1, L 2 and L 5 independently of one another represent -O-, -S-, -OC(=O)-, -OC(=S)-, -SC(=O)-, -SC (=S) -, -OS(=O) 2 O-, -OS (=O) 2 - or -N -, wherein R 12 represents a saturated or unsaturated, linear or branched, aliphatic or cycloaliphatic or an optionally substituted, aromatic or araliphatic radical having up to 20 carbon atoms, which can optionally comprise heteroatoms from the group oxygen, sulfur, nitrogen, or represents hydrogen; and L 3 and L 4 independently of one another represent - OH, -SH, -OR 13, -Hal, -OC(=O)R 14, -SR 15, -OC(=S)R 16, -OS (=O) 2 OR 17, -OS (=O) 2 R 18 or -NR 19 R 20, or L 3 and L 4 together represent -L 1 -X-D-Y-L 2 -, wherein R 13 to R 20 independently of one another represent saturated or unsaturated, linear or branched, aliphatic or cycloaliphatic or optionally substituted, aromatic or araliphatic radicals having up to 20 carbon atoms, which can optionally comprise heteroatoms from the group oxygen, sulfur, nitrogen, or represent hydrogen.