Hand Dishwashing Composition with Amine Suds Stabilizer

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Solution Overview

Problem

Hand dishwashing compositions face challenges in maintaining stable and long-lasting suds, especially when exposed to acidifying soils, which can lower the pH of the wash solution and negatively impact foaming potential, leading to frequent replacement and suboptimal cleaning performance.

Innovation Solution

A hand dishwashing cleaning composition comprising a surfactant system with an anionic surfactant, amine oxide, and optionally nonionic surfactants, along with a specific amine that stabilizes suds and enhances grease removal, even in the presence of acidifying soils, by maintaining a suitable pH range and using a chelant like aminocarboxylates to improve cleaning efficacy.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-generated harmful factors

If acidifying soils are present in the wash solution, then grease removal is improved, but suds stability deteriorates due to pH lowering

Engineering Contradiction:
Improvegrease removalVSAvoidsuds stability
Core Design Contradiction:
Object-generated harmful factorsVSStability of the object's composition

Solution Approach 1:

The patent converts the harmful effect of acidifying soils (which lower pH and reduce foaming) into a beneficial situation by formulating a detergent system that is specifically designed to thrive in acidic conditions. The amine oxide and anionic surfactant combination maintains effective sudsing and cleaning performance at lower pH levels, transforming the previously harmful acidic environment into an acceptable operating condition for the detergent system.

Inventive Principle:
Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

The patent changes the chemical parameters of the detergent system by introducing amine oxide as a key surfactant component. This parameter change allows the system to maintain stability and effectiveness across a broader pH range, particularly at lower pH values caused by acidifying soils. The amine oxide's unique properties enable it to function effectively where conventional surfactants would fail, thus adapting the detergent's performance parameters to match the acidic wash conditions.

Inventive Principle:
Principle #35Parameter changes

2Reliability

If sudsing ability is improved to indicate cleaning performance, then user perception of effectiveness is enhanced, but foam stability under acidic conditions deteriorates

Engineering Contradiction:
Improvesuds indication of performanceVSAvoidfoam stability at lower pH
Core Design Contradiction:
ReliabilityVSStability of the object's composition

Solution Approach 1:

The patent transforms the previously harmful acidic environment into a beneficial operating condition by designing a surfactant system specifically optimized for acidic pH. The amine oxide and anionic surfactant combination generates reliable suds and maintains foam stability at lower pH levels, converting the acidic condition from a performance-destroying factor into an acceptable甚至 optimal operating range for the detergent system.

Inventive Principle:
Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

The patent employs a composite surfactant system combining amine oxide with anionic surfactants. This composite approach creates synergistic effects where the amine oxide provides pH stability and foam maintenance capabilities, while the anionic surfactant delivers strong cleaning performance and suds generation. Together, they create a unified system that maintains both foam stability and cleaning effectiveness under acidic conditions generated by greasy soils.

Inventive Principle:
Principle #40Composite materials

3Object-generated harmful factors

If detergent composition is optimized for grease removal, then cleaning efficacy is improved, but foam generation and stability are reduced

Engineering Contradiction:
Improvegrease removal efficacyVSAvoidfoam generation and stability
Core Design Contradiction:
Object-generated harmful factorsVSQuantity of substance

Solution Approach 1:

The patent merges the grease removal function with foam generation and stability functions into a single integrated surfactant system. The amine oxide serves dual purposes: it provides pH buffering capacity that stabilizes foam while simultaneously enhancing grease removal through its surface-active properties. The anionic surfactant complements this by providing strong detergency and suds generation. This merging of functions eliminates the trade-off between grease removal and foam stability.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The amine oxide component performs multiple functions simultaneously: it acts as a surfactant for grease removal, a pH buffer to maintain stability, and a foam stabilizer. This multi-functionality allows a single ingredient to address multiple performance requirements (cleaning efficacy, pH control, and foam stability) without requiring separate additive systems, thus achieving universal performance across all desired parameters.

Inventive Principle:
Principle #6Universality (Multi-functionality)

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 provides excellent grease removal and long-lasting suds stability across varying pH conditions, reducing the need for frequent detergent dosing and improving overall cleaning performance, particularly with greasy soils.

Implementation Method 1

The amine... stabilizes suds and enhances grease removal, even in the presence of acidifying soils, by maintaining a suitable pH range

Methodology Applied
Scientific EffectpH buffering:

Implementation Method 2

The composition comprises a surfactant system and an amine... provides excellent grease removal

Methodology Applied
Scientific EffectSurfactant action: Surfactant

Implementation Method 3

a co-surfactant selected from an amine oxide... provides stable and long lasting suds

Methodology Applied
Scientific EffectAmine oxide surfactant action: Surfactant

Implementation Method 4

using a chelant like aminocarboxylates to improve cleaning efficacy

Methodology Applied
Scientific EffectChelation:

Data Source

PatentEP3284809B1Cleaning composition
Publication Date: 2019.09.25 PROCTER & GAMBLE CO
  • EP3284809B1 patent drawing
  • EP3284809B1 patent drawing
  • EP3284809B1 patent drawing

AI summary

A hand dishwashing cleaning composition comprising a surfactant system and an amine of Formula (I):          R1-N-R2R3     (I) wherein R1 is a cyclic or acyclic polyhydroxyhydrocarbyl; R2 is hydrogen or methyl; and R3 is a C6 to C30 hydrocarbyl.