The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 20, 2018
Filed:
Mar. 26, 2014
Mitsui Chemicals, Inc., Minato-ku, Tokyo, JP;
Shinsuke Ito, Omuta, JP;
Nobuo Kawato, Kurume, JP;
Kouji Suesugi, Arao, JP;
Shigetoshi Kuma, Kurume, JP;
Tatsuya Ogawa, Ravenna, IT;
Toshiya Hashimoto, Ichihara, JP;
Mamoru Tanaka, Fukuoka, JP;
MITSUI CHEMICALS, INC., Minato-Ku, Tokyo, JP;
Abstract
The polymerizable composition for an optical material of the present invention contains (A) at least one kind of isocyanate having two or more isocyanato groups, which contains aromatic isocyanate, (B) at least one kind of alcohol having two or more hydroxyl groups, (C) an acidic phosphoric acid ester represented by the following Formula (1), and (D) a benzotriazole-based compound, in which a ratio of secondary hydroxyl groups to the total molar number of primary and secondary hydroxyl groups contained in the alcohol (B) is equal to or greater than 50%, and the benzotriazole-based compound (D) is contained in an amount of 1 part by weight to 11 parts by weight with respect to a total of 100 parts by weight of the isocyanate (A) and the alcohol (B).