Detergent Composition With Fluorescent Whitening at Low Wash Temperatures
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Solution Overview
Problem
Current fluorescent whitening agents in detergents face challenges with solubility, build-up properties, light-fastness, and whiteness maintenance, especially at low washing temperatures, and there is a need for improved agents that can enhance whiteness properties when used with peroxides, activators, and bleaching catalysts.
Innovation Solution
A detergent composition comprising 1-70% anionic and/or nonionic surfactant, 1-75% builder, 0.001-5% compound of specific formula, 0-30% peroxide, 0-10% peroxide activator, 0-5% bleaching catalyst, and 0-5% enzyme, with preferred ratios of compounds of formulae (1), (2), and (3), which are synthesized through known processes, to enhance whitening performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional fluorescent whitening agents are used in detergent formulations, then they can eliminate yellowish shades through light absorption/emission properties, but they exhibit poor solubility, inadequate build-up properties, and insufficient light-fastness
Solution Approach 1:
The patent modifies the chemical structure of fluorescent whitening agents by changing parameters such as the introduction of hydrophilic groups (sulfonate, carboxylate) and adjustment of molecular weight, thereby improving solubility and build-up properties while maintaining whitening effectiveness
Solution Approach 2:
The invention uses composite fluorescent whitening agents that combine multiple functional groups and structural elements within a single molecule, achieving both improved solubility/build-up properties and enhanced whitening performance through the synergistic effect of different structural components
2Reliability
If conventional fluorescent whitening agents are used, then they can provide initial whiteness, but they fail to maintain whiteness effectively under various washing conditions and exhibit poor light-fastness
Solution Approach 1:
The patent optimizes chemical parameters of the fluorescent whitening agents, including the introduction of stable aromatic structures and protective groups, to enhance resistance to degradation from light, heat, and mechanical washing, thereby improving both whiteness maintenance and light-fastness
3Reliability
If standard detergent formulations are used, then they can provide basic cleaning function, but they deliver insufficient whitening performance and fabric appearance improvement
Solution Approach 1:
The patent achieves superior whitening performance by optimizing the concentration and selection of fluorescent whitening agents within specific ranges (0.1-5% of total detergent weight), along with adjusting pH and compatibility with other detergent components, thereby enhancing whitening ability without excessive formulation complexity
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 composition achieves superior whitening ability, excellent whiteness maintenance, and improved fabric feel, with effective performance at low temperatures and stability in the presence of active chlorine donors and perborate, delivering improved whiteness and fabric appearance.
Implementation Method 1
They exhaust during the treatment on to the material to be washed and, by virtue of their special light absorption/emission property, result in elimination of the yellowish shades
Implementation Method 2
The whiteness properties, like whiteness maintenance, can even be enhanced by the use of compounds of formula (1) in detergents containing a peroxide, a peroxide activator and/or a bleaching catalyst
Data Source
AI summary
A detergent composition comprising i) 1-70% of an anionic or nonionic surfactant, ii) 1-75% of a builder, iii) 0.001-5% of at least one compound of Formula (1) wherein R represents a C1-C4alkyl residue and M represents hydrogen or an alkali metal cation, optionally with further FWA's, iv) 0-30% of a peroxide, v) 0-10% of a peroxide activator, vi) 0-5% of a bleaching catalyst and vii) 0-5% of an enzyme, each component by weight, based on the total weight of the detergent composition, use thereof for domestic washing of textile fibre materials and a process for the fluorescent whitening of textile materials.