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Hydrophilic silicones and siloxanes are widely used as surfactants and emulsifiers. They consist mainly of a dimethylsiloxane backbone in which some of the methyl groups are replaced by polyalkylenoxy or pyrrolidone groups with a propyl group as a spacer. The ratio of silicone to polyalkylenoxy groups affects the properties of the material. The higher the alkylene oxide content the higher the hydrophilicity. Materials with 75% or higher ethylene oxide content are freely soluble in water. These materials can be used as wetting agents, lubricants, and anti-fog treatments. Hydroxylic and cationic silicones also can be used as emulsifiers and polyelectrolytes, respectively. These materials are most importantly used for anti-fogs and anti-stats. Silanes and other metal organics with hydrolysable groups can be used react to surfaces for imparting hydrophilicity to the surface. Trisiloxanes are low viscosity materials that have unique wetting, surfactant and solvency characteristics. Their unusual characteristics are derived from having a small “cloud” of silicone hydrophobic groups from which the hydrophilic group extends.
A brochure is available describing Gelest’s products and application information. Hydrophobicity, Hydrophilicity and Silane Surface Modification
| Polyalkylene Oxide Silicones |
| DBE-712 | Dimethylsiloxane-Ethylene oxide block copolymer |
| DBP-732 | Dimethylsiloxane - (60% Propylene oxide-40% Ethylene oxide) block copolymer |
| DBE-224 | Dimethylsiloxane-Ethylene oxide block copolymer |
| Hydroxylic and Cationic Silicones |
| QMS-435 | 35-45% (Trimethylphenethyl)methylsiloxane - 55-65% Dimethylsiloxane copolymer, chloride salt |
| CMS-222 | (Carbinol functional)methylsiloxane-Dimethylsiloxane copolymer |
| Poly(alkyleneoxy) functional metal organics and silanes |
| AKT841 | O-Allyloxy(polyethyleneoxy)triisopropxytitanate |
| SIT8192.0 | N-(3-Triethoxysilylpropyl)-4-hydroxybutyramide |
| SIM6492.7 | 2-[Methoxy(polyethyleneoxy)propyl]trimethoxysilane |
| Trisiloxanes |
| SIH6185.0 | (Hydroxypolyethyleneoxypropyl)heptamethyltrisiloxane |
| SIM6492.6 | (Methoxypolyethyleneoxypropyl)heptamethyltrisiloxane |
| SIA0075.0 | (Acetoxypolyethyleneoxypropyl)heptamethyltrisiloxane |
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