Patent ID: 9545161
Date: 2017-01-17
CPC Classifications: A47G,B82Y,C03C,G02B,Y10T

Claim:
1. A method of making an article with anti-reflective properties comprising the steps of: (i) reacting nano-particles with an amount of surface modifying agent; (ii) pre-hydrolysing an inorganic binder; (iii) mixing the surface modified particles from step (i) with the pre-hydrolysed binder from step (ii) to form a coating composition; (iv) applying the coating composition to a substrate that includes hygroscopic sodium salt compounds; (v) forming a cured coating by curing the coating composition and causing the hygrosopic sodum salt compounds to migrate into the cured coating at a curing temperature of between about 200° C. to about 700° C. and causing the hygroscopic sodium salt compounds to migrate into the cured coating; (vi) washing the cured coating with water or a solvent for the hygroscopic sodium salt compounds for about 30 seconds sufficient to remove the hygroscopic sodium salt compounds from the cured coating and thereby obtain an article having a reflectivity of less than 2% after storage for 28 days and having an amount of sodium measured in the coating by XPS of less than 1 wt %.