Metal free bleaching composition
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Solution Overview
Problem
Current bleaching agents, particularly those using hydrogen peroxide (H2O2) and its precursors, exhibit reduced effectiveness at lower temperatures, leading to inadequate bleaching performance and potential damage to textiles and dyes due to the use of transition metal complexes.
Innovation Solution
A composition comprising specific α-aminoketones, H2O2, a H2O2 precursor, or a peracid, optionally with a bleach activator, which enhances bleaching efficiency at lower temperatures without causing fiber damage, as it does not rely on metal complexes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If transition metal complexes are used to activate H2O2 for bleaching, then bleaching effectiveness is improved, but fiber damage occurs
Solution Approach 1:
The invention extracts and eliminates the harmful transition metal complexes from the bleaching system while retaining the beneficial bleaching action of H2O2 through alternative activation mechanisms using organic compounds, thereby preventing fiber damage
Solution Approach 2:
The patent introduces organic compounds as intermediary substances that mediate between H2O2 and the substrate, enabling effective bleaching without direct contact between H2O2 and fiber damage, thus resolving the contradiction between effectiveness and harm
2Use of energy by stationary object
If H2O2 is used for bleaching at lower temperatures, then energy consumption is reduced, but bleaching performance decreases
Solution Approach 1:
The invention changes the chemical parameters by introducing organic compounds that modify the activation behavior of H2O2, enabling effective bleaching at lower temperatures where conventional H2O2 alone would be ineffective
Solution Approach 2:
Organic compounds serve as intermediaries that facilitate H2O2 activation at lower temperatures, bridging the gap between reduced energy input and maintained bleaching performance
3Productivity
If conventional bleach activators are used to improve low-temperature bleaching, then bleaching efficiency is enhanced, but metal complex stability issues arise
Solution Approach 1:
The invention extracts the problematic metal components from conventional bleach activators and replaces them with stable organic compounds that provide similar activation functionality without stability issues
Solution Approach 2:
The patent employs organic compounds that are stable and reliable alternatives to metal complexes, eliminating the need for stable metal-ligand coordination systems while maintaining bleaching efficiency
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 provides a highly efficient bleaching action across various applications, including textiles and dishes, with improved performance at lower temperatures and reduced risk of fiber damage, extending bleaching efficiency to higher pH values.
Implementation Method 1
Peroxide-containing bleaching agents have long been used in washing and cleaning processes. They have an excellent action at a liquor temperature of 90°C and above
Implementation Method 2
The latter activation, which in the present case tends rather to be undesirable, could even impair the bleaching effects, which are inadequate at low temperatures, of H2O2 and its derivatives
Data Source
AI summary
The present invention relates to the use of a composition comprising specific a-amino- ketones, H2O2, a H2O2 precursor or a peracid and optionally an activator as a bleaching mixture for textile materials or dishes either manually or in an automatic washing machine or dish washer. Further aspects of the invention are the composition comprising specific a- aminoketones and H2O2, a H2O2 precursor or a peracid and a process for bleaching of stains or of soiling on textile materials or dishes in the context of a washing process either manually or in an automatic washing machine or dish washer. Also aspects of the invention are detergent formulations comprising such a composition and novel compounds.