Patent ID: 8377345
Filing Date: 2013-02-19
Classification: B29C,B29D,B29K,B29L,C08G,G02B,Y10S

Abstract:
1. A method of manufacturing an eyewear lens, the method comprising: heating a component (A) to a viscosity of 5000 CPS or less, passing the heated component (A) through a filter under pressure, thereby removing foreign matter comprised in the component (A), subsequently degassing the filtered component (A) under a reduced pressure, mixing the degassed component (A) and a component (B), immediately after the mixing, casting the mixture into a casting mold, thereby obtaining the eyewear lens, and leaving the casting mold in a low-temperature atmosphere, thereby polymerizing said mixture in the casting mold by a self-heating of said mixture, and leaving the casting mold in a high-temperature atmosphere for further polymerization of said mixture after a temperature of the self-heating reaches a maximum peak, wherein the component (A) is an isocyanate terminal prepolymer in the form of a reaction product of an aliphatic diisocyanate having an intramolecular cyclic structure and a diol having an average molecular weight of 300 to 2,500, and wherein the component (B) is one or more aromatic diamines of the formula (I), wherein in the formula (I), R