Red dye compounds, processes for their preparation, low-heat-migration red disperse dyes and their use
The red dye compound synthesized via the diazotization-coupling route solves the problems of dyeing consistency and stability of high-performance disperse dyes in applications such as polyester-based sportswear, and achieves high-temperature dyeing stability and one-bath dyeing effect of low-thermal-migration red disperse dyes.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-04-28
- Publication Date
- 2026-07-17
AI Technical Summary
Existing high-performance disperse dyes have problems in high-end applications such as polyester-based sportswear, including strong pH sensitivity, poor heat treatment temperature tolerance, insufficient storage fastness, and uncontrollable dye migration in blended systems, which affect dyeing consistency and stability.
Red dye compounds were synthesized using a diazotization-coupling route. By covalently linking the diazo component and the coupling component, electron-withdrawing groups and sterically hindered groups were introduced to regulate the electron distribution and molecular structure, thereby enhancing the stability and fiber compatibility of the dye and preparing a low-thermal-migration red disperse dye.
It achieves dye stability and one-bath dyeing effect in high-temperature dyeing processes, improves storage fastness, sublimation fastness and dispersion stability, and is suitable for conventional high-temperature dyeing at 130℃. It can ensure that cotton components are not damaged without additional reduction washing.
Smart Images
Figure CN122405019A_ABST