US 12,331,248 B2
Multi-stable and erasable anti-counterfeiting technology with controlled reflection color and application thereof in optical coding
Weihong Zhu, Shanghai (CN); Zhigang Zheng, Shanghai (CN); Huijun Li, Shanghai (CN); and Honglong Hu, Shanghai (CN)
Assigned to EAST CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY, Shanghai (CN); and SUZHOU KUNHUANG NEW MATERIAL TECHNOLOGY CO., LTD., Jiangsu (CN)
Appl. No. 17/311,378
Filed by EAST CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY, Shanghai (CN); and SUZHOU KUNHUANG NEW MATERIAL TECHNOLOGY CO., LTD., Suzhou (CN)
PCT Filed Oct. 12, 2020, PCT No. PCT/CN2020/120431
§ 371(c)(1), (2) Date Jun. 7, 2021,
PCT Pub. No. WO2021/232660, PCT Pub. Date Nov. 25, 2021.
Claims priority of application No. 202010425456.8 (CN), filed on May 19, 2020.
Prior Publication US 2022/0335443 A1, Oct. 20, 2022
Int. Cl. G06Q 30/00 (2023.01); C09K 9/02 (2006.01); G06Q 30/018 (2023.01)
CPC C09K 9/02 (2013.01) [C09K 2211/1081 (2013.01); C09K 2211/1092 (2013.01); G06Q 30/0185 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A use method of a dual erasable material system with continuous and controllable reflection color as an anti-counterfeiting material or in the field of optical information encoding,
the dual erasable material system being composed of an intrinsic chiral diarylethene compound based on steric hindrance ethene bridge and a liquid crystal (LC) material, the intrinsic chiral diarylethene compound based on steric hindrance ethene bridge having a structure shown in formula 1o:

OG Complex Work Unit Chemistry
and a mass ratio of the intrinsic chiral diarylethene compound based on steric hindrance ethene bridge to the LC material being in a range of 1:200 to 1:18; and the LC material being a nematic LC, a chiral LC, a smectic LC, a thermotropic LC, or a mixture of lamellar and columnar lyotropic LCs;
the use method comprising:
mixing the intrinsic chiral diarylethene compound based on steric hindrance ethene bridge and the LC material to obtain an LC mixture, and
injecting the LC mixture in a cell to obtain the anti-counterfeiting material or a target material with optical information encoding function,
wherein the optical information encoding function refers to realizing multi-channel encoding of light with any wavelength of 450 nm to 680 nm; and
the anti-counterfeiting material undergoes reversible dual anti-counterfeiting at least twice.