Lysine-Based Silicone Surfactants

Highly efficient silicone surfactants are typically based on polyether hydrophiles. As part of a program to increase the natural content silicones, we describe synthesis with amino acid hydrophiles (cysteine, arginine, and lysine). The compounds were prepared using radial thiol–ene reaction vinylsilicones for cysteine derivatives catalyst-free aza-Michael arginine lysine. Short chain monomer:hydrophile ratios 5:1 or less (e.g., telechelic silicones lysine-linker-(Me2OSi)n-linker-lysine n = 10) ineffective at stabilizing emulsions oil (D4): water. However, excellent realized as length (n) increased 25 50, water-in-oil high water (80% 90%). surfactants, especially longer compounds, stable against pH except <4 >9 survived freeze/thaw cycles. These contain 12–25% materials, improving their sustainability compared those containing synthetic