| abstract |
The invention relates to thermostable hydrophilic condensation products of aldehydes and ketones containing acid groups, such as those formed in the reaction of compounds introducing ketones, aldehydes and acid groups. The condensation products have very good thermal stability; they are stable up to temperatures of 300 ° C, even in the presence of water. The condensation products can be used as thickeners, retention agents, surfactants, dispersants or liquefiers for aqueous systems. |