Solid Laundry Softener with Inorganic Carrier
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Solution Overview
Problem
There is a challenge in formulating solid fabric softener compositions that can achieve high loading concentrations of quaternary ammonium compounds, as they tend to lose stability, especially in humid environments, and struggle to match the performance of liquid softeners.
Innovation Solution
The development of solid laundry softening compositions that combine quaternary ammonium compounds with an inorganic carrier, along with stabilizing surfactants and processing aids, to create a stable, flowable powder that can be pressed or extruded into a solid form, allowing for high loading concentrations and improved stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If high loading concentrations of quaternary ammonium compounds are used in solid softener compositions, then the fabric softening performance is improved, but the stability of the composition deteriorates, especially in humid environments
Solution Approach 1:
The patent introduces an inorganic carrier (such as magnesium sulfate, calcium sulfate, or sodium sulfate) as an intermediary substance that absorbs and stabilizes the quaternary ammonium compound. This carrier acts as a mediator between the high concentration of softening agent and the environmental humidity, preventing direct interaction that would cause instability. The inorganic carrier creates a buffered system that maintains composition stability while allowing high loading concentrations of the quaternary ammonium compound.
Solution Approach 2:
The patent creates a composite material system combining quaternary ammonium compounds with inorganic carriers and additional stabilizing components. This composite formulation integrates multiple functions: the inorganic carrier provides structural stability and humidity resistance, while the quaternary ammonium compound delivers fabric softening performance. The composite structure allows high concentrations of the active ingredient to be maintained without sacrificing stability, as the inorganic components form a stable matrix that prevents degradation.
2Reliability
If solid fabric softener compositions are formulated to match liquid softener performance, then the functional equivalence is improved, but the formulation complexity increases
Solution Approach 1:
The patent systematically adjusts formulation parameters to achieve performance parity between solid and liquid softeners. By modifying the concentration levels of quaternary ammonium compounds, adjusting the type and amount of inorganic carrier, and optimizing the ratio of stabilizing surfactants, the formulation achieves liquid-equivalent performance in solid form. This parameter optimization approach allows complex performance requirements to be met through controlled adjustment of compositional variables rather than fundamentally different formulation strategies.
Solution Approach 2:
The patent designs a multi-functional formulation where a single solid composition serves multiple functions simultaneously: it provides fabric softening, maintains stability under varying humidity conditions, and offers ease of storage and transport. The inorganic carrier performs multiple roles including structural support, humidity buffering, and stability enhancement. This multi-functionality approach simplifies the overall formulation by consolidating multiple required properties into a single integrated composition rather than requiring separate additives for each function.
3Ease of operation
If liquid fabric softener compositions are used, then the ease of handling and dispensing is improved, but the packaging material requirements and transportation weight increase
Solution Approach 1:
The patent utilizes phase transition principles to convert the liquid softener formulation into a solid state while maintaining ease of use. The solid composition is designed to dissolve or disintegrate upon contact with water during the laundry process, transitioning from a solid handling form to an aqueous active form. This phase transition approach allows the product to be handled and stored as a lightweight solid, reducing packaging and transport requirements, while still providing the ease of liquid-like dispensing and application characteristics 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 solution provides a stable solid composition with high quaternary ammonium compound loading, maintaining performance comparable to liquid softeners while offering improved storage stability and reduced humidity-induced instability.
Implementation Method 1
combine quaternary ammonium compounds with an inorganic carrier to provide a flowable powder for solidification in a pressed or extruded solid composition
Implementation Method 2
combined with softening boosters, processing aids, stabilizing surfactants, and/or additional functional ingredients to provide stable solid compositions
Data Source
AI summary
Solid laundry softening compositions and applications of use are disclosed. Solid laundry softening compositions combine quaternary ammonium compounds with an inorganic carrier to provide a flowable powder for solidification in a pressed or extruded solid composition. A high loading of quaternary ammonium compound in the inorganic carrier, including an inorganic salt, can be further combined with softening boosters, processing aids, surfactants, and/or additional functional ingredients to provide stable solid compositions.