In textile dyeing, personal care, leather finishing and waterborne coatings, ordinary methyl silicone oil is completely water-insoluble, requiring emulsification with poor stability and oil floating; traditional cationic softeners have weak hydrophilicity and easy yellowing; natural oil softeners poor heat resistance and low durability; pure polyether surfactants limited in surface tension reduction, unable to impart silicone-specific slip and drape. For specs demanding "siloxane backbone soft care + side-chain polyether hydrophilicity + fully water miscible + low surface tension", a strictly controlled polyether-modified water-soluble silicone oil welds siloxane flexibility and water-soluble dispersion at one molecular node. Addressing this, Anhui IOTA Silicone Oil Co., Ltd. launches IOTA-1291 Water Soluble Silicone Oil. Polyether-modified polymethylsiloxane, hydrophilic organic and highly hydrophobic polysiloxane polymer. Appearance colorless to light yellow transparent liquid. Density (25℃) 1.030 g/cm³. Viscosity (25℃) 500-1500 cSt. Refractive index (25℃) 1.448-1.458. Cloud point (1% soln.) 42℃. Surface tension (25℃) 23 mN/m. Active content 99.9%. Soluble in ethanol, acetone, completely miscible with water in any ratio. Used as fabric finishing agent, skin protective film, cosmetic sensory modifier, leather slip agent, waterborne coating leveling aid. Dosage in water system 0.5-1.0%, 2-4% for anti-stick mask. 25kg, 50kg plastic drum or 200kg drum. Non-dangerous transport. Shelf life 2 years. Brand IOTA. System Positioning: Water Soluble Silicone Oil Among Silicone Softeners Within silicone fabric finishing agents, IOTA-1291 is a polyether-modified nonionic water-soluble silicone oil, distinct from emulsified methyl silicone oil (needs emulsifier, phase separation), amino silicone microemulsion (cationic, yellowing, poor hydrophilicity), epoxy-modified silicone (reactive, not water-soluble), alkyl-modified silicone (partially water-soluble, lubrication-focused). IOTA-1291 uses PDMS backbone with grafted polyether hydrophilic segments, positioning as "fabric hydrophilic soft finishing agent + daily chemical sensory modifier + leather slip finishing agent + waterborne coating leveling aid", rather than reactive crosslinker or simple emulsified silicone. Molecular Architecture: Polyether-Modified Polymethylsiloxane + Density 1.030 + Viscosity 500-1500 + Surface Tension 23 IOTA-1291 core is a polyether-block or grafted polydimethylsiloxane copolymer; hydrophilic polyether chains extend outward granting water dispersion, hydrophobic siloxane backbone curls inward forming thermodynamically stable micelles. Density 1.030 g/cm³ close to water aids uniform dispersion without settling; viscosity 500-1500 cSt balances flow and film thickness; refractive index 1.448-1.458 near that of fibers avoids whitening; cloud point 42℃ ensures full dissolution in ambient to mid-temp process window; surface tension as low as 23 mN/m, far below water's 72, gives excellent spreading, wetting and penetration; active 99.9% no inert diluent, all participates in interface control. Performance Leap: From "Silicone Oil Insoluble, Softener Not Hydrophilic" to "Polyether Hydrophilic, Siloxane Soft Care" With IOTA-1291, four-way synergy: hydrophilic softness—polyether segment grants moisture absorption and breathability, siloxane backbone gives silky drape, finished fabric soft, smooth, comfortable, crisp, dimensionally stable; skin affinity—good water solubility and surface activity form breathable protective film on skin, dry/wet combing excellent, skin-feel soft non-greasy; leather finishing—as senior leather slip and finishing agent, gives leather surface smooth, bright, soft comfortable touch; leveling boost—in waterborne coatings, acrylic adhesives, inks reduces surface tension, improves flow and film spreading. Application Penetration: From Textile Finishing to Daily Chemical, Leather and Waterborne Industry IOTA-1291 covers four core scenarios.

• Textile fabric finishing: cotton, linen, silk, wool and synthetic blends—hydrophilic soft post-finishing; add 0.5-1.0% in water system, pad or dip process for durable softness.
• Personal care & cosmetics: creams, lotions, hair care—sensory modulation and dry/wet combing; low surface tension and breathable film lift spreadability and slip.
• Leather finishing: natural and synthetic leather—senior slip agent and finishing agent; imparts smooth bright soft comfortable feel.
• Waterborne coatings & adhesives: waterborne paints, acrylic adhesives, inks—leveling and spreading; add 0.5-1.0% to reduce surface defects.

⚠️ Taboo: non-dangerous but avoid mixing storage with strong oxidants; long-term high-temp storage may oxidize polyether chains, recommend ambient sealed; anti-stick mask at 2-4% needs pre-trial; beyond 2 years retest viscosity and surface tension. IOTA Technical Guide: 25/50kg Plastic Drum or 200kg Drum, Non-DG IOTA-1291 is colorless to light yellow transparent liquid in 25kg, 50kg plastic drum or 200kg drum. Add directly into water system 0.5-1.0% and stir; for anti-stick mask add 2-4%. Seal store ambient dry, non-dangerous transport; shelf life 2 years. Industry Insight: Water-soluble silicone oil selection is not the higher cloud point the better, but using polyether ratio for hydrophilicity and cloud point, siloxane backbone length for soft drape, surface tension for spreading penetration, viscosity for application leveling. For textile finishing, daily chemical and leather engineers, IOTA-1291 uses one fully water-soluble polyether-modified silicone oil across fabric soft care, skin sensory and coating leveling, taking polyether hydrophilic and siloxane soft care as batch-checkable anchors, securing hydrophilicity and slip simultaneously.