Multistage Polymer Cosmetic Formulation for Wear and Color Retention

The patent employs a multistage polymer comprising an acrylate-rich stage and a carbosiloxane-rich stage as a composite material system. The acrylate-rich stage provides adhesion and film formation, while the carbosiloxane-rich stage provides water resistance and wear properties. This composite polymer structure resolves the contradiction by integrating multiple functional materials into a single formulation that achieves both long wear resistance and color retention without requiring complex multi-component systems or frequent reapplication.

The patent applies segmentation by dividing the polymer synthesis into two distinct stages: an acrylate-rich stage and a carbosiloxane-rich stage. Each stage can be synthesized and characterized independently, allowing for controlled composition ratios (acrylate-rich stage: 40-80 wt%, carbosiloxane-rich stage: 20-60 wt%). This segmentation simplifies manufacturing by enabling modular synthesis procedures and quality control, while still achieving the desired color retention and wear resistance properties through the coordinated action of both stages.