Aqueous fluorescent ink and preparation method and use thereof

US11873412B2 · kind B2 · utility

Assignee

• Harbin Institute of Technology, Shenzhen · CN

Inventors

• Huanhuan Feng · Lo Wu, CN
• Min Wang · Gilbert, US
• Kunkun Jiang · Tangxia, CN
• Yueyue Zhang · Lo Wu, CN
• Zhenchao Zhang · Lo Wu, CN
• Weiwei Zhao · Wuxi, CN
• Xing Ma · Lo Wu, CN
• Jiaheng Zhang · Lo Wu, CN
• Tingting Zheng · Lo Wu, CN

Key dates

• Filing date: Feb 17, 2021
• Grant date: Jan 16, 2024
• Expiry date: Dec 7, 2041

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K2211/1483
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Disclosed is an aqueous fluorescent ink and a preparation method and use thereof. The aqueous fluorescent ink provided by the present disclosure includes 0.10%-0.14% of polystyrene micro-spheres, 0.010%-0.014% of fluorescent dyes, 0.4%-0.6% of surfactants, and the balance of water. The present disclosure uses polystyrene micro-spheres as a fluorescent dye carrier, which is colorless and transparent under ordinary daylight and completely invisible, and displays fluorescence only when irradiated by ultraviolet light and has high fluorescence intensity. The surfactant makes the polystyrene fluorescent micro-spheres uniformly dispersed in the fluorescent ink, and the stability of the fluorescent ink is improved. Water is used as a solvent, which has excellent safety and environmental friendliness. The accuracy of the printed patterns can reach 30 μm, which can help realize large-format ultra-high-precision patterned anti-counterfeiting encryption printing. Through precision printing, the two-dimensional code can be implemented with one code for one object, and has excellent anti-counterfeiting ability.