Hydrophobic Car Wash Composition With Low-Foam Silicone Deposition
Solution Overview
Problem
Conventional car washes that provide a hydrophobic finish either foam excessively or fail to deliver a suitable hydrophobic coating due to the interaction between anionic surfactants and cationic hydrophobic agents, leading to ineffective coating formation.
Innovation Solution
A composition comprising an amino functional silicone emulsion, an amphoteric surfactant, and a combination of non-ionic surfactants is used to achieve a hydrophobic finish without excessive foaming, utilizing amphoteric and non-ionic surfactants to stabilize the amino siloxane coating on automotive surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If anionic surfactants are used to provide high foaming, then foamability is improved, but hydrophobic finish is lost due to complex formation with cationic hydrophobic agents
Solution Approach 1:
The invention extracts and removes the anionic surfactant component from the formulation, replacing it with non-ionic and amphoteric surfactants. This extraction eliminates the harmful complex formation between anionic surfactants and cationic amino siloxane, while preserving the desired high foaming properties through alternative surfactant mechanisms.
Solution Approach 2:
The invention changes the charge parameter of the surfactant system from anionic (negative charge) to non-ionic (neutral charge) and amphoteric (pH-dependent charge). This parameter change prevents electrostatic complex formation with the cationic amino siloxane, allowing both high foaming and effective hydrophobic finish to coexist.
2Reliability
If non-ionic surfactants are used to avoid complex formation, then hydrophobic finish is maintained, but foaming properties are reduced
Solution Approach 1:
The invention merges multiple surfactant types (non-ionic surfactants, amphoteric surfactants, and amino functional silicone emulsion) into a synergistic formulation. This combination allows the non-ionic surfactants to maintain hydrophobic finish while the amphoteric surfactants and amino siloxane contribute to high foaming properties, achieving both goals simultaneously.
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 a hydrophobic finish with controlled foaming, ensuring effective coating adherence and stability on automotive surfaces while minimizing foam generation.
Implementation Method 1
Amino siloxanes have a positive charge, which when they come in contact with the surface of, for example, a car (paint, wheel, rubber, glass), bond with the negative charge present on the surface, leaving behind a coating of silicone, which is hydrophobic.
Implementation Method 2
leaving behind a coating of silicone, which is hydrophobic
Implementation Method 3
The present disclosure solves the issue of high foaming without the use of anionic surfactants by using a combination of an amphoteric and non-ionic surfactant
Data Source
AI summary
Compositions and methods that impart a hydrophobic finish to surfaces, such as, for example, automotive surfaces. The compositions comprise an amino functional silicone emulsion, an amphoteric surfactant, and, a non-ionic surfactant.