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:
Mar. 23, 2021
Filed:
Sep. 15, 2016
Mitsui Chemicals, Inc., Tokyo, JP;
Naoyuki Kakinuma, Omuta, JP;
Koji Suesugi, Arao, JP;
MITSUI CHEMICALS, INC., Tokyo, JP;
Abstract
A polymerizable composition for an optical material includes an episulfide compound (A); an organic coloring matter (B); an UV absorber (C); and a polymerization catalyst (D), wherein the organic coloring matter (B) has a main absorption peak (P) between 565 nm and 605 nm in a visible light absorption spectrum, an absorption coefficient (ml/g·cm) of a peak apex (Pmax) exhibiting a maximum absorption coefficient of (P) is equal to or greater than 0.5×105, a peak width in an absorbance of ¼ of an absorbance of (Pmax) of (P) is equal to or less than 50 nm, a peak width in an absorbance of ½ of the absorbance of (Pmax) of (P) is equal to or less than 30 nm, and a peak width in an absorbance of ⅔ of the absorbance of (Pmax) of (P) is in a range of equal to or less than 20 nm.