Laundry Dye Composition Brightening via Sunlight
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Solution Overview
Problem
Existing detergent formulations fail to achieve desired color brightness, particularly in achieving vibrant blue hues, as current dyes tend to produce dull colors when exposed to sunlight.
Innovation Solution
A detergent composition combining violet cationic alkoxylated thiophene dyes with blue triphenyl methane dyes, along with surfactants, where the molar ratio of blue to violet dye is between 1:1 to 1:3, and surfactants comprise 5 to 70 wt% of the formulation, enhancing color brightness upon sunlight exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If violet cationic thiophene dyes are mixed with additional dyes to obtain other aesthetic colours, then colour variety is improved, but colour brightness deteriorates
Solution Approach 1:
The patent applies parameter changes by carefully controlling the molar ratio of blue triphenyl methane dye to violet cationic alkoxylated thiophene dye within the range of 1:1 to 1:3. This specific ratio optimization ensures that the desired aesthetic color variety is achieved while maintaining or enhancing color brightness upon sunlight exposure, resolving the contradiction between color variety and brightness
Solution Approach 2:
The invention uses a composite dye system combining blue triphenyl methane dye and violet cationic alkoxylated thiophene dye in specific proportions. This composite approach creates a synergistic effect where the combination produces brighter colors upon sunlight exposure compared to using individual dyes alone, thereby achieving both color variety and brightness
2Adaptability or versatility
If dyes are used to provide aesthetic colours in detergent, then visual appeal is improved, but color stability under sunlight deteriorates
Solution Approach 1:
The patent optimizes the concentration parameters of both dyes within specific ranges (violet dye: 0.0001 to 0.1 wt%, preferably 0.0005 to 0.005 wt%; blue dye with molar ratio 1:1 to 1:3). This parameter optimization ensures that the detergent provides desirable aesthetic colors while achieving improved color stability and brightness upon sunlight exposure
Solution Approach 2:
The composite dye system combining blue triphenyl methane dye and violet cationic alkoxylated thiophene dye creates a synergistic effect that enhances color stability under sunlight. The specific composition ratio ensures that the mixture maintains or improves color brightness upon sunlight exposure, contrary to the deteriorating effect observed with single dyes or conventional mixtures
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 combination of violet and blue dyes results in a brighter blue color when exposed to sunlight, with specific surfactant ratios and types optimizing the color enhancement, as demonstrated by increased optical density ratios and minimal dye loss during simulated sunlight exposure.
Implementation Method 1
mixtures of violet thiophene dyes and blue triphenyl methane dyes become brighter blue on exposure to sunlight
Data Source
AI summary
A coloured laundry detergent is provided that brightens on exposure to light.