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

摘要

Condensation polymers of sulfonated phenols, urea, other organic nitrogen-bases and formaldehyde, obtainable byPP (A) sulfonation of phenols with from 1.0 to 1.5 moles of sulfuric acid per mole of phenol andPP(B) condensation of these sulfonation products withPP(a) from 0.5 to 1.8 moles of urea per mole of phenol,PP(b) from 0.001 to 0.5 moles of at least one other organic nitrogen-base per mole of phenol, andP P(c) from 1.0 to 3.0 moles of formaldehyde per mole of phenol. P PThe condensation polymers are suitable for use as tanning agents in the leather and skin-producing industry and as spraying aids for redispersible polymer powders.