Polyether Modified Silicone Oil
Overview
Polyether modified silicone oil is a hybrid organosilicon polymer where polyether groups (typically ethylene oxide or propylene oxide) are grafted onto a silicone backbone. This modification combines the lubricity and heat resistance of silicones with the hydrophilicity of polyethers. First developed in the 1970s, it revolutionized textile processing by enabling water-soluble silicone treatments. The degree of polyether modification determines its hydrophilic-lipophilic balance (HLB), making it adaptable for diverse industrial formulations.
Physical and Chemical Properties
The compound exhibits exceptional thermal stability (up to 180°C) and maintains viscosity across a wide temperature range (-40°C to 150°C). Its surface tension ranges from 20-25 mN/m, lower than conventional surfactants. Unlike unmodified silicones, it forms stable microemulsions in water due to its amphiphilic structure. The silicon-oxygen backbone provides flexibility, while polyether chains contribute to moisture absorption and compatibility with polar substrates.
Main Applications
In textiles, it serves as a durable softener that improves fabric hand feel without reducing moisture permeability. The cosmetic industry utilizes it in hair conditioners and skincare products for its non-greasy slip characteristics. Industrial applications include foam control in paints, leveling agents for coatings, and release aids in plastic molding. Its molecular structure can be tailored for specific purposes—higher EO content increases water solubility, while PO groups enhance oil compatibility.
Safety and Storage
Though classified as non-hazardous, prolonged skin exposure should be avoided. Spills create slippery surfaces requiring immediate cleaning with absorbents. Storage tanks should use nitrogen blanketing to prevent oxidation. Product degradation manifests as increased acidity or viscosity changes. Shelf life typically exceeds 12 months when stored properly. Incompatible with strong acids/bases and heavy metal salts, which may catalyze decomposition.
B2B Procurement Guide
Technical specifications should include: polyether content (wt%), EO/PO ratio, active matter percentage, and pH value. Bulk shipments (IBC totes or tankers) offer 15-30% cost savings versus drum quantities. Quality verification involves checking hydroxyl value (100-200 mg KOH/g) and cloud point (typically 20-80°C). Reputable suppliers provide GC-MS analysis confirming absence of cyclosiloxanes (D4-D6), which face regulatory restrictions.
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