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1. (WO2018221466) EYEGLASS LENS, COMPOSITION FOR PRIMER LAYER FORMATION, AND METHOD FOR MANUFACTURING EYEGLASS LENS

Pub. No.:    WO/2018/221466    International Application No.:    PCT/JP2018/020402
Publication Date: Fri Dec 07 00:59:59 CET 2018 International Filing Date: Tue May 29 01:59:59 CEST 2018
IPC: G02B 1/14
G02B 1/115
G02C 7/00
Applicants: NIKON-ESSILOR CO.,LTD.
株式会社ニコン・エシロール
Inventors: SAKAI Koichi
坂井 幸一
Title: EYEGLASS LENS, COMPOSITION FOR PRIMER LAYER FORMATION, AND METHOD FOR MANUFACTURING EYEGLASS LENS
Abstract:
This eyeglass lens is outstanding in anti-crazing properties, impact resistance properties, and adhesion. The present invention comprises: a lens substrate; a primer layer disposed on the lens substrate; and at least one layer that is disposed on the primer layer and that is selected from the group consisting of a hard-coat layer and a reflection-preventing layer. The primer layer contains a polycarbonate-based polyurethane resin and inorganic oxide particles. The tensile strength of the polycarbonate-based polyurethane resin is over 40 N/mm2. The expansion rate of the polycarbonate-based polyurethane resin is at least 300%, and the inorganic oxide particle content is 10–40% by volume with respect to the total volume of the primer layer.