Condensation products based on amino-s-triazines and the use thereof

Process for the production of a condensation product comprising

• (a) heating amino-s-triazine, formaldehyde and a sulphite at a temperature of from 60 to 90° C. and at a pH value of 9.0 to 13.0 in a mole ratio of 1:2.5 to 6.0:1.51 to 2.0, the mole ratio of formaldehyde to sulphite being 1.8 to 2.4:1 in aqueous solution until the sulphite is no longer detectable;
• (b) thereafter condensing at a pH value of 3.0 to 6.5 and at a temperature of 60 to 80° C. until the condensation product has a viscosity of 5 to 50 mm2/s at 80° C.;
• and
• (c) adjusting said condensation product to a pH of 7.5 to 12.0.

Process for the production of a condensation product comprising

• (a) heating amino-s-triazine, formaldehyde and a sulphite at a temperature of from 60 to 90° C. and at a pH value of 9.0 to 13.0 in a mole ratio of 1:2.5 to 6.0:1.51 to 2.0, the mole ratio of formaldehyde to sulphite being 1.8 to 2.4:1 in aqueous solution until the sulphite is no longer detectable;
• (b) thereafter condensing at a pH value of 3.0 to 6.5 and at a temperature of 60 to 80° C. until the condensation product has a viscosity of 5 to 50 mm2/s at 80° C.;
• and
• (c) thermally post-treating the condensation product a pH of ≧10.0 and a temperature of 60 to 100° C.

A condensation product prepared by the process comprising the steps of

• (a) heating amino-s-triazine, formaldehyde and a sulphite at a temperature of from 60 to 90° C. and at a pH value of 9.0 to 13.0 in a mole ratio of 1:2.5 to 6.0:1.51 to 2.0, the mole ratio of formaldehyde to sulphite being 1.8 to 2.4:1 in aqueous solution, until the sulphite is no longer detectable;
• (b) thereafter condensing at a pH value of 3.0 to 6.5 and at a temperature of 60 to 80° C. until the condensation product has a viscosity of 5 to 50 mm2/s at 80° C.;
• and
• (c) adjusting said condensation product to a pH of 7.5 to 12.0.