Detergent Composition Yield Point via 2,5-Diketopiperazine
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Solution Overview
Problem
Liquid surfactant compositions, particularly detergents, face challenges in maintaining a stable suspension of solid particles, leading to sedimentation and uneven dosage, as well as aesthetic issues like clumping and precipitation, due to the lack of a yield point at high surfactant concentrations, which affects cleaning performance and clarity.
Innovation Solution
Incorporating 2,5-diketopiperazine compounds to create a yield point in the surfactant compositions, allowing for the stable suspension of solid particles and preventing macroscopic separation, thereby ensuring consistent performance and appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high surfactant concentrations are used to improve cleaning performance, then cleaning efficacy is improved, but the yield stress becomes excessively high causing flow inhomogeneity and particle adhesion
Solution Approach 1:
The patent changes the chemical structure parameters of the thickening agent from conventional polymers to 2,5-diketopiperazine compounds with specific molecular weight (500-5000 g/mol) and functional groups. This parameter change allows achieving the desired yield stress (0.01-5 Pa) at high surfactant concentrations without causing flow inhomogeneity or particle adhesion, thus resolving the contradiction between cleaning performance and flow homogeneity.
2Stability of the object's composition
If polymeric thickeners are used to establish yield stress at high surfactant concentrations, then yield point is achieved, but large quantities impair cleaning performance and cause greying of textiles
Solution Approach 1:
The patent uses low molecular weight 2,5-diketopiperazine compounds (500-5000 g/mol) instead of high molecular weight polymeric thickeners. These smaller molecules provide the necessary yield point functionality without the negative side effects of large polymers, such as impaired cleaning performance and textile greying. The smaller size allows them to be more easily rinsed away and less interfering with the cleaning action.
Solution Approach 2:
The patent fundamentally changes the molecular weight parameter of the thickening agent from polymer range (>10,000 g/mol) to low molecular weight range (500-5000 g/mol). This parameter change enables the thickening agent to provide yield point stability without the adverse effects on cleaning performance associated with conventional polymeric thickeners.
3Stability of the object's composition
If conventional thickeners are used to prevent sedimentation, then particle suspension is improved, but the composition becomes less clear and aesthetic appeal is reduced
Solution Approach 1:
The patent changes the molecular size and structure parameters of the thickening agent to low molecular weight 2,5-diketopiperazine compounds. These smaller molecules create a more transparent matrix that allows light to pass through more effectively, maintaining product clarity while still providing sufficient yield stress to prevent particle sedimentation and maintain aesthetic appearance.
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 use of 2,5-diketopiperazine compounds enables the creation of a stable, homogeneous liquid surfactant composition with a yield point, preventing particle sedimentation and maintaining cleaning efficacy while enhancing aesthetic appeal by ensuring solid particles remain suspended.
Implementation Method 1
Incorporating 2,5-diketopiperazine compounds to create a yield point in the surfactant compositions, allowing for the stable suspension of solid particles and preventing macroscopic separation
Implementation Method 2
liquid surfactant compositions with a yield point, in particular detergents, containing at least one 2,5-diketopiperazine compound... in which solid particles (in particular speckles) can be homogeneously suspended
Data Source
AI summary
A liquid surfactant composition, in particular a detergent, having a flow limit and containing, relative to the total weight thereof, (i) at least one 2,5-diketopiperazine compound of the formula (I), wherein R1, R2, R3, R4 and R5 are as defined in claim 1 and (ii) a total amount of 0.1 to 70 wt.-% of at least one surfactant and (iii) water, is storage-stable even when solid particles are incorporated. The surfactant compositions are particularly suitable for use as liquid detergent compositions.