G. Yamauchi et al., WETTING CHARACTERISTICS OF NEWLY DEVELOPED WATER-REPELLENT MATERIAL, Colloids and surfaces. A, Physicochemical and engineering aspects, 116(1-2), 1996, pp. 125-134
A water-repellent material with a contact angle of more than 150 degre
es has been developed. This material is composed of low molecular weig
ht polytetra-fluoroethylene (PTFE) particles and an appropriate binder
. The water-repellent properties were found to persist even after expo
sure to ultraviolet light and water splashing for a time equivalent to
20 years at ambient conditions.