External Structuring System for Liquid Detergent Shear Resistance
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Solution Overview
Problem
Aqueous laundry detergent compositions face challenges in maintaining stability due to shear sensitivity, leading to irreversible aggregation and loss of structuring ability during processing, storage, and transportation, resulting in suboptimal rheology and increased quantities of external structuring systems required.
Innovation Solution
The use of a combination of crystallizable glycerides, anionic surfactants, and organic non-aminofunctional alcohols in the external structuring system, which includes crystals of hydrogenated castor oil, pH adjusting agents, and specific surfactants, to create a more stable fiber network that resists shear damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If external structuring systems (ESS) are used to stabilize liquid detergent compositions, then phase separation is prevented and particulate matter is suspended, but the ESS loses 20-30% of its structuring stability during processing, storage, and transportation due to shear-induced fiber aggregation and breakage
Solution Approach 1:
The invention modifies the chemical composition parameters of the ESS by incorporating specific ratios of crystallizable glycerides (2-10%), anionic surfactants (5-50%), and organic non-amino functional alcohols (1-2.5%). This parameter optimization creates a more shear-resistant fiber network that maintains structuring ability despite mechanical stress during processing and transportation.
Solution Approach 2:
The invention creates a composite external structuring system by combining three distinct functional components: crystallizable glycerides (which form the fiber network), anionic surfactants (which stabilize the structure), and organic non-amino functional alcohols (which enhance shear resistance). This composite approach synergistically improves overall stability while maintaining reliability under shear conditions.
2Stability of the object's composition
If higher quantities of crystallizable glycerides are used to compensate for shear loss, then desired structuring is achieved, but the formulation complexity and cost increase
Solution Approach 1:
The invention optimizes the concentration parameters to use only 2-10% crystallizable glycerides (significantly lower than traditional formulations) by adjusting the supporting parameters of anionic surfactant content (5-50%) and organic alcohol content (1-2.5%). This parameter optimization achieves desired rheology with lower glyceride levels, reducing formulation complexity.
Data Source
AI summary
The present invention relates to external structuring system(s) (ESS) comprising crystallized triglycerides including crystallized hydrogenated castor oil (HCO), surfactant and organic non-amino functional alcohols to reduce shear sensitivity. The present invention also relates to laundry detergent compositions in liquid or gel form comprising ESS.