Cosmetic Emulsion Stability with Alkyl Acrylate and Allylic Polymers

The patent uses specific polymer combinations (C10-C40 alkyl acrylate polymer and allylic polymer) as intermediaries that mediate between skin care ingredients and the formulation matrix. These polymers act as carriers and stabilizers, allowing skin care ingredients to be incorporated without compromising formulation stability. The polymers create a compatible interface between hydrophilic and lipophilic components, enabling stable emulsion formation.

The patent employs composite polymer systems combining C10-C40 alkyl acrylate polymer with allylic polymer (such as allyl stearate/VA copolymer). This composite approach creates a synergistic effect where the combination of polymers provides both stability and skin care functionality. The composite material structure allows for enhanced emulsion stability while incorporating beneficial skin care ingredients without phase separation or degradation.

The patent utilizes parameter changes in polymer composition and molecular weight to achieve the desired balance between stability and sensory properties. By selecting specific ranges for alkyl chain length (C10-C40) and copolymer ratios, the formulation achieves optimal viscosity, spreadability, and non-tacky feel. The parameter optimization ensures that skin care ingredients are incorporated at concentrations that maintain both stability and pleasant sensory characteristics.

The patent applies local quality by creating different functional zones within the formulation structure. The polymer network provides structural stability in the bulk phase, while the emulsifying agents and skin care ingredients are distributed locally at the oil-water interface. This localized arrangement allows skin care ingredients to be effective without affecting the overall sensory properties of the formulation.

The patent employs emulsifying agents and stabilizers as intermediaries that mediate between sensory enhancement additives and the formulation matrix. These intermediaries create compatible interfaces, allowing additives that improve sensory properties (such as emollients, humectants, and polymers) to be incorporated without causing phase separation or stability issues. The intermediaries act as bridges between hydrophilic and lipophilic components.

The patent uses composite emulsion systems combining multiple polymers, emulsifying agents, and skin care ingredients in a synergistic formulation. This composite approach allows for the incorporation of sensory-enhancing additives while maintaining stability through the cooperative action of multiple components. The composite structure provides both aesthetic appeal and formulation stability simultaneously.