In the polyether-modified silicone (PES) spectrum, the "bis-hydroxy end-capping" and "Si–O–C block copolymer" structure jointly dictate compatibility depth in organic lubricants, antistatic contribution to synthetic fibers, and chemical reactivity with organic resins like polyurethane. Conventional dimethyl silicone oil poorly compatibilizes with organics, is hard to wash off, and non-reactive; mono-hydroxy PES is hydrophilic but single-node, cannot serve as bis-end block in PU network construction. As high-speed spinning lubricants, organic fabric coating anti-stick/wear, and PU resin hydrolysis-stability upgrades demand "bis-hydroxy + 100% active + specific gravity 1.04 + easy water-wash," sourcing a bis-hydroxy polyether-modified silicone with pale-yellow to amber transparent appearance, viscosity 200-500cSt (25℃), recommended 0.5-10% has become the core gap for domestic block PES localization.
Addressing this "bis-hydroxy block" pain point,
Anhui IOTA Silicone Oil Co., Ltd. (IOTA) officially launches
Bis-Hydroxy Polyether-Modified Silicone IOTA 23667. Characterized by "pale-yellow to amber transparent liquid, viscosity 200-500mm²/s (25℃), 100% active, SG 1.04, recommended 0.5-10%, 200kg/1000kg PE drum, 6-month shelf (unopened)," and backed by "bis-hydroxy reactive block + polyether hydrophilic antistatic + 100% solvent-free easy-wash," it serves as the "bis-hydroxy polyether anchor" for synthetic fiber treatment, organic fabric coating anti-stick/wear, and PU resin hydrolysis stabilization.
Molecular Architecture: Bis-Hydroxy Ends + Polyether Block + 100% Active 3D Logic
The core competitiveness of IOTA 23667 stems from its "both ends hydroxy-terminated polyether-polysiloxane block copolymer" AB-type structure:
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Bis-Hydroxy Reactive Anchor: Both ends carry active –OH, reacting with –NCO in PU prepolymers, epoxy groups, or carboxylic groups—becoming part of the crosslinked network (not physical filler), permanently locked, non-migrating, non-bleeding, not reducing coating durability.
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Polyether Block Hydrophilic Antistatic: Embedded PEG/PPG segments grant hydrophilicity and moisture absorption, forming micro-water film on fiber surface, lowering surface resistance (antistatic); polyether chains highly compatibilize with organic lubricants (mineral oil/esters/amides), solving traditional silicone "oil stain hard-remove"—hot water wash suffices.
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100% Active Zero VOC: No solvent, no diluent; 200-500cSt pumps and blends easily at processing temps; SG 1.04 close to most organic resins, co-blend resists stratification.
Performance Leap: From "Dimethyl Physical Fill" to "Bis-Hydroxy Chemical Crosslink"
Incorporating IOTA 23667 enables qualitative leaps:
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Synthetic Fiber Spin Finish: 2-5% in POY/DTY finish blended with mineral oil/fatty ester/antistatic—fiber dynamic friction -30-40%, good cohesion, hot-water wash removes finish post-weaving, no silicone spots.
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Organic Fabric Coating Anti-Stick/Wear: 3-8% in PU/acrylic coating—peel force -20-35%, Martindale abrasion +15-25%, no hand-feel loss.
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PU Resin Hydrolysis Stability: 3-6% replaces part of polyether polyol in wet-process PU—bis-OH participates chain-extension, 80℃×95%RH×7d tensile retention from 60% to >80%.
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Resin Flow Enhance: 0.5-2% in epoxy/UP lowers viscosity, improves filler wet-out and deaeration, post-cure gloss up.
Application Penetration: From High-Speed Spinning to Synthetic Leather
IOTA 23667 covers sectors triply sensitive to "organic compatibility + reactive crosslink + easy-wash":
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Textile Lubricants: Polyester/nylon/PP spinning finish, weaving auxiliaries, antistatic finish.
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Fabric Coatings: PU/acrylic coating anti-stick additive, wear enhancer, leveling agent.
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PU Synthetic Leather: Wet/dry process PU slurry hydrolysis-stable mod, base surface treatment.
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Organic Resins: Epoxy/polyester/PU coating flow adjust, reactive modifier.
IOTA Technical Guide: Organic Blend, Bis-OH Crosslink
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Spin Finish: Heat IOTA 23667 with other components (lubricant, antistatic, emulsifier) to 40-60℃, stir uniform, dilute to 10-20% working soln; apply 0.3-1.2% on fiber.
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Fabric Coating Add: Direct into PU/acrylic resin, high-speed disperse 10-20min (3-8%); if system contains isocyanate crosslinker, bis-OH will react—control pot life.
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PU Hydrolysis Mod: Add together with polyol at prepolymer chain-extension (3-6%), or post-extension 80-100℃×1-2h.
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Taboo Red Line: Non-haz but moisture-seal (polyether end absorbs humidity → viscosity rises, premature NCO reaction); avoid long contact with strong acid/base (Si–O–C may cleave); not compatible with peroxides; read MSDS before use.
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Storage: 200kg/1000kg PE drum; cool ventilated dry; shelf 6 months (unopened), retest viscosity/appearance/activity and extend if qualified; non-haz transport.
Industry experts note that under high-speed synthetic fiber spinning, organic coating anti-stick/wear upgrade, and PU synthetic leather hydrolysis-standard tightening, bis-hydroxy polyether-modified silicones are upgrading from "Momentive/Shin-Etsu block PES followers" to "bis-hydroxy reactive crosslink reference modified silicones." IOTA 23667, with its "100% active + bis-hydroxy + 200-500cSt + SG 1.04" hard metrics,
fills the domestic supply chain gap for bis-hydroxy polyether-modified silicones in fiber lubrication and organic coating fields, providing a mass-producible path to replace imported Momentive L-7600 series, Shin-Etsu polyether-modified silicones for downstream spin-finish and coating plants. This confirms domestic PES oils are advancing steadily along "mono-hydroxy → bis-hydroxy → reactive block crosslink," with growing technical say in organic-siloxane hybrid interfacial engineering key materials.
