Detergent Surfactant Mixture for Conditioning and Viscosity Stability

The patent combines amino acid type surfactants with other surfactant components (such as fatty acid amide betaines and polyoxyethylene fatty acid ethers) to create a synergistic formulation. This merging allows the detergent to maintain both excellent conditioning effects and stable viscosity over time, as the combined surfactant system provides mutual support for both properties.

The invention uses composite surfactant systems that integrate multiple types of surfactants with complementary properties. The amino acid type surfactant is combined with zwitterionic surfactants and nonionic surfactants in specific ratios, creating a composite material that achieves both high conditioning performance and long-term viscosity stability that cannot be obtained with single surfactant types.

The patent introduces amphoteric surfactants as intermediary components that mediate between cationic polymers and the aqueous medium. These amphoteric surfactants reduce the direct interaction between cationic polymers and skin/hair, minimizing irritation while preserving conditioning effects. They act as a buffer that allows the cationic polymer to provide conditioning without compromising user comfort or foaming performance.

The invention optimizes the molecular weight, charge density, and concentration of cationic polymers to achieve the desired balance. By carefully controlling these parameters and combining them with specific ratios of anionic and amphoteric surfactants, the formulation maintains effective conditioning while ensuring good foaming properties and user experience.

The patent extracts or reduces the concentration of purely anionic surfactants that provide foaming but lack conditioning, and replaces them with zwitterionic and amphoteric surfactant components. This extraction allows the formulation to maintain adequate foaming while gaining conditioning benefits from the alternative surfactant types.

The invention employs amphoteric surfactants that perform multiple functions: they contribute to foaming generation, provide conditioning effects, and reduce skin irritation. This multi-functionality allows a single component to address multiple requirements, reducing the need for high concentrations of specialized anionic surfactants for foaming.