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:
Jan. 23, 2024
Filed:
Apr. 15, 2019
Applicant:
Tokuyama Corporation, Shunan, JP;
Inventors:
Masayuki Miyazaki, Tsukuba, JP;
Junji Takenaka, Tsukuba, JP;
Assignee:
TOKUYAMA CORPORATION, Shunan, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K 9/02 (2006.01); C08G 18/72 (2006.01); C08L 83/06 (2006.01); C08G 65/332 (2006.01); C08G 77/14 (2006.01); C08K 5/1545 (2006.01);
U.S. Cl.
CPC ...
C09K 9/02 (2013.01); C08G 18/722 (2013.01); C08G 65/332 (2013.01); C08G 77/14 (2013.01); C08K 5/1545 (2013.01); C08L 83/06 (2013.01); C09K 2211/1088 (2013.01);
Abstract
The invention is a photochromic compound having an indenonaphthopyran skeleton, and the indenonaphthopyran skeleton has an alkenyl group having 10 to 30 carbon atoms, and an oligomer chain group A having 3 or more recurring units selected from a polyalkylene oxide oligomer chain group, a polyester oligomer chain group, a polysiloxane chain group and a polyester polyether oligomer chain group. The invention can provide a photochromic compound capable of expressing excellent photochromic characteristics in various cured products and capable of preventing cured products from becoming cloudy.