Polymeric Violet Anthraquinone Colorants for Stable Non-Staining Formulations
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Solution Overview
Problem
Existing violet anthraquinone dyes face challenges such as stability issues, gelling, precipitation, and staining when used in consumer products like detergents and paints, and they are not polymeric in nature, which limits their application and compatibility.
Innovation Solution
Development of polymeric violet anthraquinone colorants with specific chemical structures that include polyoxyalkylene moieties, providing improved light and pH stability, non-staining properties, and enhanced compatibility with other materials, synthesized through methods involving reactions with bromamine acid and polyoxyalkylene-substituted amines, resulting in compounds like 1-amino-4-polyalkyleneoxy violet anthraquinones.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional violet anthraquinone dyes are used, then coloration is achieved, but stability and precipitation issues occur in formulations
Solution Approach 1:
The patent applies composite materials by combining anthraquinone dye molecules with polymeric carriers to create polymeric violet anthraquinone colorants. This composite structure integrates the coloring function of anthraquinone with the stability and solubility benefits of polymeric materials, preventing precipitation while maintaining coloration effectiveness in various formulations.
Solution Approach 2:
The patent changes the molecular parameter of the dye by attaching polymeric chains to the anthraquinone core structure. This parameter modification transforms the physical and chemical properties of the dye, improving its stability in formulations and preventing precipitation without compromising its coloring ability.
2Reliability
If conventional violet anthraquinone dyes are used, then coloration is achieved, but staining of surfaces occurs
Solution Approach 1:
By creating composite polymeric violet anthraquinone colorants, the patent modifies the surface interaction properties of the dye. The polymeric component reduces the affinity of the anthraquinone chromophore for textile and skin surfaces, thereby preventing staining while maintaining effective coloration of intended substrates.
Solution Approach 2:
The patent applies local quality by directing the coloring action specifically to intended targets while reducing unwanted interactions. The polymeric structure localizes the coloring effect to surfaces designed to be colored, while minimizing adhesion to skin, fabrics, and other surfaces that should remain unstained.
3Ease of operation
If violet anthraquinone dyes are made into liquid form by dissolving, then ease of handling is improved, but solubility is low and color strength is very low
Solution Approach 1:
The patent creates polymeric violet anthraquinone colorants that maintain liquid or semi-solid forms for ease of handling, while the polymeric structure enhances both solubility and color strength. This composite approach allows the dye to be handled conveniently in liquid form without sacrificing coloring power.
Solution Approach 2:
By changing the molecular structure to include polymeric chains, the patent improves both the physical handling properties and the functional properties of the dye. The polymeric modification increases solubility in water and other solvents while simultaneously enhancing color strength, allowing concentrated liquid formulations with high coloring power.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The polymeric violet anthraquinone colorants exhibit excellent light fastness, pH stability, and non-staining characteristics, making them suitable for use in consumer products like laundry detergents and fabric softeners, with improved solubility and compatibility, and can be tailored for various applications.
Implementation Method 1
the color value is determined and calculated on the absorbance of a 1 gram per liter through a one centimeter cell length of the colorant, in the appropriate solvent, by UV-vis spectroscopy
Data Source
AI summary
This invention relates to polymeric violet anthraquinone colorants having at least one poly(oxyalkylene) chain attached to an anthraquinone structure. Such colorants exhibit bright violet shade, excellent compatibility with organic media or aqueous systems, good lightfastness, and excellent thermal stability. The water soluble poly(oxyalkylene) substituted polymeric violet anthraquinone colorants also possess high water solubility, high color strength, non-staining properties, and high pH stability. The processes and methods for making such polymeric violet anthraquinone colorants and their use for coloring consumer products are also provided.