Disperse Dye Mixtures for Polyester Fastness and Sublimation Resistance
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Solution Overview
Problem
Disperse azo dyes with 2-oxoalkylketo groups in existing dye mixtures for polyester and polyester blends often exhibit unsatisfactory wash- and contact-fastness properties, particularly in Black, Navy, and Brown shades, limiting their application and durability.
Innovation Solution
A novel dye mixture comprising specific combinations of dyes with 2-oxo-alkylketo groups, including at least one dye of formula (1) and one of formula (2), optionally with additional dyes from formulas (3), (4), (5a), and (5b), which are selected and combined to enhance wash- and contact-fastness properties, particularly improving reduction stability and dry-heat sublimation fastness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional dye mixtures are used for Black, Navy and Brown shades, then the dyes provide basic coloring, but the fastness properties remain unsatisfactory
Solution Approach 1:
The patent applies parameter changes by systematically varying the chemical structure parameters of the disperse azo dyes, specifically incorporating 2-oxoalkylketo groups with different alkyl chain lengths and configurations in formulae (1) and (2). This structural parameter optimization enables the dye mixture to achieve enhanced fastness properties while maintaining manageable composition complexity through defined structural relationships.
Data Source
AI summary
Dye mixtures based ondye(s) of formula (1) and dyes(s) of formula (2), formula (3), formula (4), formula (5a), and/or formula (5b).