Disperson polymers which contain urea groups and are based on ethylenically unsaturated monomers, process for their preparation and their use

A polymer based on ethylenically unsaturated monomers, which contains monomer units of urea derivatives with .alpha.,.beta.-ethylenically unsaturated carboxyl or carboxamide radicals and has been produced by solution, emulsion, suspension or bead polymerization or copolymerization, or a solution or aqueous dispersion of this polymer, wherein the polymer contains at least 1% by weight of monomer units of ethylenically unsaturated urea derivatives of the formula ##STR6## the radicals R.sup.1 to R.sup.5 and Z have the following meaning in formula I:

• R.sup.1, R.sup.2, R.sup.3, which may be identical or different,
• =H or CH.sub.3,
• Z= ##STR7## R.sup.7 =H or CH.sub.3 and m, p=in each case at least the number 1, R.sup.4, R.sup.5, which may be identical or different, =H, an optionally substituted (C.sub.1 -C.sub.30)-alkyl, an optionally substituted --(C.sub.k H.sub.2k)--OH with k=1 to 8, an optionally substituted (C.sub.6 -C.sub.10)-aryl, an optionally substituted (C.sub.7 -C.sub.30)-aralkyl, an optionally substituted (C.sub.5 -C.sub.8)-cycloalkyl, an optionally substituted 5- to 7-membered heterocycle or an optionally substituted heterocycle formed from R.sup.4 and R.sup.5 jointly with the nitrogen atom.