Effective method for the production of anti-fog (dew-resistant) coatings based on bifunctional polysiloxanes

Abstract

Anti-fog (dew-resistant) coatings were produced employing as active components bifunctional polysiloxanes containing polyether (hydrophilic and polar) groups and trialkoxysilyl groups (permitting durable adhesion to glass surface). These bifunctional polysiloxanes were obtained as a result of consequent hydrosilylation of allyl polyethers and vinyltrialkoxysilane with the use of poly(dimethyl-co-hydromethyl)siloxane. The effect of structure of the polysiloxane used (length of siloxane chain, length of polyether chain, content of functional groups) and its concentration of the coating performance were analyzed. The designed preparation permits easy production of a durable anti-fog and dew-resistant coating from widely accessible raw materials and with no need of special pretreatment of glass surface.