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:
Feb. 13, 2018
Filed:
Feb. 26, 2014
Tokuyama Corporation, Shunan-shi, Yamaguchi, JP;
Yasutomo Shimizu, Shunan, JP;
Junji Takenaka, Shunan, JP;
Junji Momoda, Shunan, JP;
Katsuhiro Mori, Shunan, JP;
TOKUYAMA CORPORATION, Shunan-shi, JP;
Abstract
A curable composition which comprises a carbonate-based polymerizable monomer represented by the following formula, other polymerizable monomers and a photochromic compound, can be used even under high-temperature and high-humidity conditions without any problems and provides a cured product having excellent photochromic properties. wherein A and A' are each a linear or branched alkylene group having 2 to 15 carbon atoms, 'a' is an average value of 1 to 20, when there are a plurality of A's, A's may be the same or different, Ris a hydrogen atom or methyl group, and Ris a (meth)acryloyloxy group or hydroxyl group.