OPTICAL LENS HAVING DETACHABLE WATER SOLUBLE POLYURETHANE LAYER AND A PROCESS THEREOF

摘要

An optical lens is provided to prevent the contamination from dust while preventing the degradation of super water repellent of an outermost layer. An optical lens has detachable water-soluble polyurethane layer having the adhesive strength of 5~50 g/cm^2. The modified polyurethane resin used as a water-soluble polyurethane layer uses the resin obtained by mixing polyurethane resin 100.0 parts by weight, amines 4~6 parts by weight, pyrrolidones 30~40 parts by weight and water 300~380 parts by weight.