Modified amino resins

A product H that can be used as crosslinking agent comprising a mixture of reaction products P of cyclic alkyleneureas U and multifunctional aldehydes A2 with further reaction products having as constituents, besides U and A2, also at least one of aminoplast formers M which are different from the cyclic alkyleneureas U, and of monofunctional aldehydes A1, the mixture constituting product H comprising the reaction products P made by reacting cyclic alkylene ureas U and multifunctional aldehydes A2, and at least one of the following reaction products:

• a) reaction products UMA2 made by reaction of cyclic alkylene ureas U, aminoplast formers M which are different from the cyclic alkyleneureas U, and multifunctional aldehydes A2;
• b) reaction products UMA1A2 made by reaction of cyclic alkylene ureas U, aminoplast formers M which are different from the cyclic alkyleneureas U, monofunctional aldehydes A1, and multifunctional aldehydes A2;
• c) reaction products MA1A2 made by reaction of aminoplast formers M which are different from the cyclic alkyleneureas U, monofunctional aldehydes A1, and multifunctional aldehydes A2;
• d) reaction products UA1A2 made by reaction of cyclic alkylene ureas U, monofunctional aldehydes A1, and multifunctional aldehydes A2;
• e) reaction products MA2 made by reaction of aminoplast formers M which are different from the cyclic alkyleneureas U, and multifunctional aldehydes A2;
• f) reaction products UA1 made by reaction of cyclic alkylene ureas U, and monofunctional aldehydes A1;
• g) reaction products UMA1 made by reaction of cyclic alkylene ureas U, aminoplast formers M which are different from the cyclic alkyleneureas U, and monofunctional aldehydes A1;
• and
• h) reaction products MA1 made by reaction of aminoplast formers M which are different from the cyclic alkyleneureas U, and monofunctional aldehydes A1,
• wherein, in the case of reaction product h) being present in mixture with the reaction product P which is UA2, at least one of the other reaction products a), b), c), d), e), f), or g) is also present in the mixture, and
• wherein product H or reaction product P of U and A2, or both are optionally etherified by reaction of at least a part of hydroxyl groups formed by addition reaction of N—H groups and aldehyde groups, with one or more aliphatic alcohols R′—OH, and which alcohol R′—OH is, optionally, linear, branched or cyclic, and
• wherein glyoxal is present in the multifunctional aldehydes A2.