High fastness orange reactive dyes and process for their preparation
By introducing heterocyclic reactive groups into reactive dyes to form complementary dual reactive groups with cyanuric chloride, high-fastness orange reactive dyes are prepared, solving the problems of low fixation rate and low color fastness of existing reactive dyes and achieving a high-efficiency improvement in dyeing performance.
Patent Information
- Application Number
- CN202311681226.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-06
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2043-12-06
AI Technical Summary
Existing reactive dyes have low fixation rates and colorfastness, especially reactive dyes with reactive groups such as cyanuric chloride and para-ester derivatives, which have poor dyeing effects on cellulose and protein fibers.
A novel heterocyclic reactive group, 6-amino-N-2-(β-ethyl sulfone sulfate ethyl)-indololinone, was introduced to complement the reactive group of cyanuric chloride, increasing the number of reactive groups in the dye molecule. A high-fastness orange reactive dye was then prepared through specific synthetic steps.
It improves the fixation rate and dyeing performance of dyes, as well as the grades of wash fastness, rubbing fastness, light fastness and chlorine fastness. The dyeing effect is significantly improved, with the fixation rate reaching over 95%, the wash fastness and dry rubbing fastness reaching grade 5, and the light fastness reaching grade 6.