| 摘要 |
Sulfonate-functional polyester polyols are derived from reactants comprising an unsaturated polycarboxylic acid or derivative thereof, a polyol, a lactone, and a sulfonating agent. The unsaturated polycarboxylic acid or derivative is substantially free of sulfonate functionality, thereby providing sulfonate-fimctional polyester polyols having low color. The sulfonate-functional polyester palyols are suitable for use, for example, in the manufacture of water-dispersible polyurethanes and polyurethanes used as dispersants for particulate materials, for example, in magnetic recording media.
|
