PRODUCTION OF POLYURETHANE LENS

摘要

PURPOSE:To efficiently produce a polyurethane lens in a high yield in a large quantitie. CONSTITUTION:In the production of a polyurethane lens, a first process separately adding various additives to polyisocyanate and polyol (containing one having one or more OH group substituted with an SH group) to separately obtain uniform liquid mixtures, a second process separately degassing the polyisocyanate liquid mixture and polyol liquid mixture obtained in the first process and a third process injecting the polyisocyanate liquid mixture and polyol liquid mixture obtained from the second process in a lens producing mold under continuous mixing to subject the same to cast polymerization to obtain the polyurethane lens are employed.