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. 08, 2022
Filed:
Dec. 20, 2019
Hoya Lens Thailand Ltd., Pathumthani, TH;
Masahisa Kousaka, Tokyo, JP;
Natsumi Tasaki, Tokyo, JP;
HOYA LENS THAILAND LTD., Pathumthani, TH;
Abstract
An iso(thio)cyanate composition for an optical component has excellent storage stability. The iso(thio)cyanate composition includes an iso(thio)cyanate compound having two or more iso(thio)cyanate groups in a molecule, a phosphoric acid ester compound represented by general formula (1), and a phosphoric acid ester compound represented by general formula (2). A total amount of the phosphoric acid ester compounds is 1 ppm or greater and less than 25,000 ppm, based on the mass of the iso(thio)cyanate compound. A molar ratio of the phosphoric acid ester compound represented by general formula (1) and the phosphoric acid ester compound represented by general formula (2) is 30/70 to 70/30.