Liquid Detergent Composition with Cleaning Amine for Grease Removal

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Solution Overview

Problem

Existing liquid detergent compositions face challenges in effectively removing grease from hydrophobic surfaces like plastic during dishwashing, often leaving a slippery residue that users find undesirable.

Innovation Solution

A liquid detergent composition comprising a specific surfactant system with an anionic surfactant and a primary co-surfactant in a specific weight ratio, along with a cleaning amine, which provides efficient grease removal and prevents a slippery feel during rinse.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-generated harmful factors

If conventional liquid detergent compositions are used, then grease removal capability is provided, but slippery residue is left on hydrophobic surfaces

Engineering Contradiction:
Improveslippery residueVSAvoidgrease removal capability
Core Design Contradiction:
Object-generated harmful factorsVSReliability

Solution Approach 1:

The patent changes the chemical composition parameters by incorporating specific cleaning amines (polyetheramines with molecular weights of 150-1000 g/mol) and adjusting the surfactant system to achieve a balance between grease removal and residue prevention. This parameter change resolves the contradiction by modifying the chemical properties of the detergent to eliminate slippery residue while maintaining cleaning effectiveness.

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The patent uses a composite surfactant system combining anionic surfactants with amphoteric or nonionic co-surfactants, along with cleaning amines. This composite material approach allows the detergent to simultaneously achieve strong grease removal (from anionic surfactants) and residue-free rinse (from amphoteric/nonionic components that prevent film formation).

Inventive Principle:
Principle #40Composite materials

2Productivity

If strong surfactants are used to improve grease removal, then cleaning efficiency increases, but rinse feel deteriorates with slippery sensation

Engineering Contradiction:
Improvecleaning efficiencyVSAvoidrinse feel
Core Design Contradiction:
ProductivityVSEase of operation

Solution Approach 1:

The patent adjusts the concentration and type of surfactants by incorporating cleaning amines and amphoteric co-surfactants in specific proportions. This parameter optimization allows strong cleaning action during wash while ensuring pleasant rinse feel, resolving the contradiction between cleaning efficiency and rinse quality.

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The amphoteric co-surfactants and cleaning amines act as intermediaries that bridge the conflicting requirements. They enhance the grease removal capability of anionic surfactants while their own molecular structures prevent the formation of slippery films, thus mediating between strong cleaning and good rinse feel.

Inventive Principle:
Principle #24Intermediary (Mediator)

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 effectively removes grease from hydrophobic surfaces without leaving a slippery residue, enhancing user satisfaction by ensuring a clean and non-slippery rinse experience.

Implementation Method 1

The surfactant system comprises an anionic surfactant and a primary co-surfactant

Methodology Applied
Scientific EffectSurfactant: Surfactant

Implementation Method 2

Amines sometimes are used as solvents in detergent compositions. In the present invention the amines play an active role in the cleaning of greasy soils.

Methodology Applied
Scientific EffectSolvation: Solvation

Data Source

PatentEP3162879B1Liquid detergent composition
Publication Date: 2018.07.18 PROCTER & GAMBLE CO
  • EP3162879B1 patent drawing
  • EP3162879B1 patent drawing
  • EP3162879B1 patent drawing

AI summary

A liquid detergent composition comprising a surfactant system, the surfactant system comprising an anionic surfactant and a primary co-surfactant selected from the group consisting of amphoteric surfactant, zwitteronic surfactant and mixtures thereof wherein the anionic surfactant and the primary co-surfactant are in a weight ratio of less than 2.5:1 and wherein the composition further comprises a cleaning amine.