Читать книгу Additives for Water-borne Coatings - Wernfried Heilen - Страница 25

Alkyl phenol ethoxylates (APE) have very good pigment dispersing properties and are very low cost. Because of their broad compatibility and strong emulsifying performance, they can be used for the production of universal colorants suitable for tinting water-borne and solvent-based base paints. APEs can create nonyl phenol by hydrolysis. Nonyl phenol is very similar in structure to the female hormone oestrogen and can produce the same effects. If waters become polluted with this, aquatic animals will only bear female descendants and so die out within a few generations. The use of APEs is therefore controversial, yet they are still widely employed in the NAFTA region as a wetting component in mill bases for emulsion paints and in water-borne and universal colorants.

Figure 2.6e: Structural example of a non-ionic APE