Thermally activated multi-metal chelate photochromic complexes and their use in 3D printing photosensitive resins
By designing a multi-metal chelate, and utilizing the synergistic effect and conjugated system of Zn2+, Co2+, and Cd2+, the problems of premature activation and insufficient stability of photochromic materials in 3D printing were solved, achieving efficient control of color-changing performance and precise printing results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- XINLIANJUKE (SHANGHAI) NEW MATERIALS CO LTD
- Filing Date
- 2026-04-29
- Publication Date
- 2026-07-17
AI Technical Summary
Existing photochromic materials suffer from problems such as premature activation, insufficient color sensitivity and color depth, and poor cycle stability during 3D printing. In particular, single-metal chelates cannot regulate color-changing performance through metal synergy, and they are prone to color change at room temperature, leading to uneven printing and reduced precision.
A multi-metallic chelate chelate of Zn2+, Co2+, and Cd2+ was used. A D-π-A conjugated system was constructed by using the electron acceptor 2,4,6-tris(2-pyridyl)-1,3,5-triazine (2-TPT) and the electron donor 9-anthracarboxylic acid. The color-changing properties were multidimensionally regulated by leveraging the diamagnetic properties of Zn2+, the coordination field effect of Co2+, and the soft acid properties of Cd2+. Peracetic acid was also introduced as a thermal degradation group to avoid premature activation.
It achieves multi-dimensional control of color-changing performance, improves light response clarity and color depth, extends cycle stability, avoids premature activation during 3D printing, and ensures printing accuracy.
Smart Images
Figure CN122404428A_ABST