METHOD FOR ENCAPSULATING PHASE TRANSITIONAL PARAFFIN COMPOUNDS USING MELAMINE-FORMALDEHYDE AND MICROCAPSULE RESULTING THEREFROM

摘要

A process for the microencapsulation of phase transitional paraffin compound s is described. Polypropylene glycols with the average molecule weight over 40 0 were used as the surface tension modifiers for emulsifying the paraffin compounds. Polyisocyanates capable of being dissolved in the phase change materials were employed to promote the deposition of melamine, partially methylolated melamine and the precondensate of melamine-formaldehyde onto th e hydrophobic droplets for the microencapsulation. The prepared emulsion of microencapsulated phase change materials was successfully coated on textile fabrics and the coated products showed improved thermal regulation function.