| 摘要 |
<p>The requirements made on the properties of pigments, which are becoming increasingly more specific, especially in the areas of emulsion paints and printing inks, necessitated the development of specific and environmentally friendly dispersants, emulsifiers and coupling assistants. The compounds according to the invention are esterification and/or arylation products of natural or modified castor oil fatty acid or ricinoleic acids, which products are alkoxylated and are optionally linked together, by esterification with dicarboxylic acids, to give repeating structural units. If desired, the hydroxyl end groups of these modified alkoxylates of castor oil fatty substances are esterified with fatty acids, aromatic carboxylic acids and/or resin acids and, preferably, remaining free hydroxyl groups are reacted with dicarboxylic acids and sulfite to give the corresponding half-esters which contain anionic radicals. The compounds according to the invention are suitable for a very wide range of applications in the area of surface-active agents, for example in order to improve colour properties and rheological properties in the production of azo pigments, emulsion paints and printing inks. The compounds according to the invention are particularly environmentally tolerated since they are biodegradable.</p> |
