Esterquat Fabric Softener Viscosity via Tri-Esterquat Optimization
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Solution Overview
Problem
Existing fabric softener compositions face challenges in achieving high viscosity at low concentrations without the need for expensive polymers or additives, while also requiring long reaction times and non-renewable resources, which affects energy efficiency and storage stability.
Innovation Solution
A liquid fabric softening composition containing an esterquat mixture with a tri-esterquat content greater than 25% and higher levels of free fatty acid, formulated using a 50% hard and 50% soft tallow fatty acid mixture, which achieves high initial viscosity without polymeric thickeners and reduces energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the percent of fabric softener active compound is reduced in liquid fabric softening composition, then the viscosity of the liquid fabric softening composition decreases, but thickness is a desirable property in liquid fabric softening compositions
Solution Approach 1:
The patent changes the chemical structure parameters of the fabric softener active compound by using specific quaternized fatty acid esters with controlled degrees of esterification (mono-, di-, and tri-ester quats). This structural parameter change enables the compound to provide both low concentration and high viscosity properties simultaneously, resolving the contradiction between reduced active compound percent and maintained thickness.
2Shape
If expensive polymers or additives are added to achieve desired viscosity, then the viscosity increases, but the cost of the composition increases
Solution Approach 1:
The fabric softener active compound itself serves the dual function of being the active softening agent and the viscosity-providing component. The quaternized fatty acid esters inherently provide high viscosity at low concentrations without requiring additional thickening agents, making the composition self-sufficient and eliminating the need for expensive polymers or additives.
3Manufacturing precision
If long reaction times are employed to achieve free fatty acid value of less than 1%, then the free fatty acid content decreases, but energy consumption increases due to reactions running between 160 and 210 degrees Celsius
Solution Approach 1:
The patent optimizes the reaction parameters including temperature, time, and molar ratios of reactants to achieve the desired free fatty acid value with reduced energy consumption. By carefully controlling these parameters, the process achieves manufacturing precision while minimizing energy usage.
4Quantity of substance
If more non-renewable petroleum-based amine hub is required, then the tri-esterquat content increases, but the sustainability of the composition decreases
Solution Approach 1:
The patent uses specific molar ratios of fatty acid to amine hub (greater than 1.94:1) to optimize the distribution of mono-, di-, and tri-ester quat formation. This parameter optimization allows achieving high tri-esterquat content while using renewable resources, thereby maintaining sustainability.
5Quantity of substance
If the iodine value of the feed is reduced to 20 or below, then the tri-esterquat content increases, but the storage stability of liquid compositions decreases due to crystallization of saturated fatty acids
Solution Approach 1:
The patent carefully selects the iodine value of the fatty acid feedstock and controls the degree of saturation to balance tri-esterquat formation with storage stability. By optimizing these compositional parameters, the invention achieves high tri-esterquat content while preventing crystallization and maintaining stability during storage.
Data Source
AI summary
A fabric conditioning active composition comprising an esterquat mixture of quaternized mono-, di-, and tri-esters of alkanolamine in which the tri-esterquat content of the quaternized esterquat mixture is greater than 25% by weight of the esterquat mixture, and the combined di-esterquat and tri-esterquat content in the esterquat mixture is greater than 78% by weight of the esterquat mixture. Additionally, the free fatty acid content of the composition is greater than 1% by weight based on the weight of the esterquat mixture. The fabric conditioning active composition provides high viscosity when dispersed into water at low concentrations of 0.5% to 12%, without the need for additional polymeric thickeners or other thickening additives.