Two-Phase Dishwashing Detergent for Protein Soil Removal
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Solution Overview
Problem
There is a need for phosphate-free automatic dishwashing detergents that maintain cleaning performance and stability, particularly in removing protein-based soils, which are challenging due to the instability of formulating alkalinity and enzymes together.
Innovation Solution
A cleaning composition comprising two distinct liquid compositions A and B, where composition A includes enzymes and composition B is enzyme-free, with citrate, MGDA, and HEDP in specific weight percentages, allowing for improved protein-based soil removal without phosphates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If phosphates are removed from the detergent formulation for environmental protection, then environmental friendliness is improved, but cleaning performance on protein-based soils deteriorates
Solution Approach 1:
The detergent formulation is segmented into two distinct liquid compositions (A and B) that are mixed at the point of use. Composition A contains enzymes while composition B is enzyme-free, allowing the enzyme to remain stable during storage and only become active when mixed with the phosphate-free composition B during the washing cycle, thus maintaining both environmental friendliness and cleaning performance
Solution Approach 2:
The invention changes the chemical parameters of the detergent by using specific chelating agents (MGDA at 5-40 wt.-% and HEDP at 1-8 wt.-%) that can effectively bind metal ions and enhance enzyme activity in the absence of phosphates, thereby maintaining cleaning performance on protein-based soils while being environmentally friendly
2Productivity
If alkalinity and enzymes are formulated together to improve protein-based soil removal, then cleaning performance is improved, but formulation stability deteriorates
Solution Approach 1:
The formulation is divided into two separate compositions: composition A containing enzymes at controlled pH, and composition B containing alkaline builders and chelating agents without enzymes. This segmentation prevents the destabilizing interaction between high alkalinity and enzymes during storage, while enabling both to work together during the washing cycle when mixed
Solution Approach 2:
The enzymes are prepared in advance in composition A under optimal stability conditions (neutral to slightly acidic pH), while the alkaline components are prepared separately in composition B. The preliminary preparation of each component under its optimal conditions ensures both stability during storage and effectiveness during use
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 effectively removes protein-based soils while being environmentally friendly and stable, maintaining cleaning performance without the use of phosphates.
Implementation Method 1
Particularly protein-based soils require both alkalinity and enzymes, such as amylases and proteases
Implementation Method 2
MGDA in an amount of from 5 to 40 wt.-%, and HEDP in an amount of from 1 to 8 wt.-%
Data Source
AI summary
The present invention relates to cleaning compositions for hard surfaces, particularly dishwashing detergents, more particularly automatic dishwashing detergents, comprising two distinct liquid compositions A and B, wherein the cleaning composition comprises citrate in an amount of from 0 to 10 wt.-%, MGDA in an amount of from 5 to 40 wt.-%, and HEDP in an amount of from 1 to 8 wt.-%, each based on the total weight of the cleaning composition. The present invention further relates to a method for cleaning hard surfaces, particularly dishes, comprising application of such a cleaning composition, as well as to the use thereof.