Surfactant System for Dish Detergent Rinse Feel and Grease Removal
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Solution Overview
Problem
Liquid dish detergent compositions with high alkoxylation provide good rinse feel but compromise on grease removal efficiency, necessitating a balance between squeaky clean benefits and effective grease removal.
Innovation Solution
A liquid detergent composition with a surfactant system comprising 35-49% alkyl sulphate, 35-49% co-surfactant (amphoteric or zwitterionic), and 12-22% nonionic surfactant, optimized to achieve both squeaky clean feel and efficient grease removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If highly alkoxylated anionic surfactants are used, then rinse feel is improved, but grease removal efficiency deteriorates
Solution Approach 1:
The patent changes the degree of alkoxylation parameter of the anionic surfactant from high (conventional) to low (x < 1 mole percentage average), which improves grease removal efficiency while maintaining acceptable rinse feel through the optimized surfactant system composition
Solution Approach 2:
The patent creates a composite surfactant system combining low-alkoxylated anionic surfactants with specific co-surfactants and nonionic surfactants in optimized ratios, achieving both effective grease removal and satisfactory rinse feel that neither component could achieve alone
2Productivity
If low degree alkoxylated anionic surfactants are used, then grease removal efficiency is improved, but rinse feel deteriorates
Solution Approach 1:
The patent introduces co-surfactants (amphoteric or zwitterionic) and nonionic surfactants as intermediary components that mediate between the low-alkoxylated anionic surfactant and the substrate, improving rinse feel without compromising the grease removal capability of the anionic surfactant
Solution Approach 2:
The patent optimizes the concentration parameters of multiple surfactant components (anionic surfactant at 1-60%, co-surfactant at 1-60%, nonionic surfactant at 1-60%) to achieve the desired balance between grease removal efficiency and rinse feel
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 achieves good squeaky clean feel while ensuring effective grease removal and suds longevity, as demonstrated by comparative data showing improved rinse feel benefits.
Implementation Method 1
a liquid detergent composition comprising: (a) 1% - 60%, preferably 5% to 50%, of a surfactant system by weight of the composition, wherein the surfactant system comprises: (i) 35% to 49%, preferably from 37% to 47% of an alkyl sulphate surfactant
Data Source
AI summary
The invention relates to a detergent composition having a ratio of surfactants optimized for clean rinse feel, particularly in relation to hand dishwashing. The surfactants comprise (i) a low or non-alkoxylated alkyl sulphate, (ii) a co-surfactant selected from an amphoteric and/or zwitterionic surfactant and (iii) a nonionic surfactant.