Condensation polymers of sulfonated phenols, urea, other organic nitrogen-bases, and formaldehyde, and their use as tanning agents and as spraying aids for redispersible polymer powders

A condensation polymer of sulfonated phenol, urea, other organic nitrogen bases and formaldehyde consisting essentially of the reaction products obtained by:

• (A) sulfonation of phenols with from 1.0 to 1.5 mols of sulfuric acid per mole of phenol;
• and
• (B) acid catalyzed condensation of the product of sulfonation of said phenols with
• a) from 0.5 to 1.8 moles of urea per mole of phenol,
• b) from 0.001 to 0.5 mole of at least one other organic nitrogen base per mole of phenol, said other organic nitrogen base is selected from the group consisting of melamine, hydroxy-(C.sub.2-20 -alkyl)-melamine, bis-hydroxy-(C.sub.2-20 -alkyl)-melamine, tris-hydroxy (C.sub.2-20 -alkyl) melamine, hydroxyaryl melamine and poly(alkylene oxide)-substituted melamine, melem, hydroxy(C.sub.2-20 -alkyl)melem, poly(alkylene oxide) substituted melem, guanamine, N-hydroxy(C.sub.2-20 -alkyl)guanamine, poly(alkylene oxide) substituted guanamine dicyanodiamide, and mixtures thereof, and
• c) from 1.0 to 3.0 moles of formaldehyde per mole of phenol,
• said acid catalyzed condensation proceeding by initially adding components a) and b) in any order to the sulfonated phenol (A) and then subsequently adding formaldehyde component c) and conducting the condensation reaction as formaldehyde is added to the reaction mixture.