Silicone surfactants

摘要

WITH the introduction of silicone chemistry for textile finishing, functional polysiloxanes have their firm place in the area of finishing. Silicones are based on Si-O-polymer structure. On the one hand, the oil viscosity differs and therefore in the medium molecular weight and on the other hand, besides the amino functional polysiloxanes, ethoxylated, propoxylated silicones as well as those with epoxy functionality have also become important through different functional side groups in the polymers. The amino functional polysiloxanes have become the most important product group within the textile softening agents. Siloxane surfactants consist of a methylated siloxane hydrophobe coupled to one or more polar groups. This class of surfactants finds a variety of uses in areas where other types of surfactants are relatively ineffective. Significant advances have taken place in recent years including their aqueous phase behavior and their unusual rapid wetting of hydrophobic substrates. Siloxane surfactants are different from conventional hydrocarbon surfactants in three significant respects.