Title:
POLYMERIZABLE COMPOSITION FOR OPTICAL MATERIAL, TRANSPARENT RESIN AND METHOD FOR PRODUCING THE SAME, AND LENS BASE MATERIAL AND METHOD FOR PRODUCING THE SAME
Document Type and Number:
Japanese Patent JP2021161243
Kind Code:
A
Abstract:
To provide: a polymerizable composition for optical materials, capable of achieving a cured product with a high refractive index and a small yellowness index ΔYI even though an aromatic polyisocyanate is used; a transparent resin using the polymerizable composition and a method for producing the same; a lens base material and a method for producing the same; and the like.SOLUTION: A polymerizable composition for optical materials comprises at least: an aromatic polyisocyanate; a polyene compound having two or more ethylenically unsaturated double bonds; and 30 to 80 mass% of a polythiol having three or more mercapto groups, wherein the polymerizable composition has a mercapto group/((isocyanate group)+(ethylenically unsaturated double bond)) equivalent ratio of 1.10 to 1.70.SELECTED DRAWING: None
Inventors:
NAGASAWA TAKUMI
IGARI MASAHITO
ARAI YUKO
IGARI MASAHITO
ARAI YUKO
Application Number:
JP2020064153A
Publication Date:
October 11, 2021
Filing Date:
March 31, 2020
Export Citation:
Assignee:
HOYA LENS THAILAND LTD
International Classes:
C08G18/38; C08G18/08; C08G18/76; C08L55/00; C08L75/04; G02B1/04
Attorney, Agent or Firm:
Yoshiyuki Inaba
Toshifumi Onuki
Akihiko Eguchi
Kazuhiko Naito
Toshifumi Onuki
Akihiko Eguchi
Kazuhiko Naito