In the hydrophilic polyether-modified silicone (PES) spectrum, the "EO/PO ratio and end-cap structure" of polyether side-chains and the "500-1500cSt viscosity window" jointly dictate infinite miscibility in cold water, surface spreading tension on fibers/leather, and flow-modification boundary in acrylic adhesives. Conventional amino silicones are soft but poorly hydrophilic and yellow; low-EO PES cloud below 30℃, precipitating in winter cold water. As textile finishing demands "cold-water full-dissolve + soft crisp + antistatic," leather finishing demands "slick gloss + comfortable hand," and waterborne coatings demand "flow + leveling gloss," sourcing a product with SG 1.030, viscosity 500-1500cSt, nD 1.448-1.458, cloud point 42℃ (1%), surface tension 23mN/m, 100% active, fully water-miscible has become the core gap for domestic fully water-soluble PES localization.
Addressing this "full-dissolve slick" pain point,
Anhui IOTA Silicone Oil Co., Ltd. (IOTA) officially launches
Water-Soluble Silicone IOTA 1291 (polyether-modified polydimethylsiloxane). Characterized by "colorless to light-yellow transparent liquid, SG 1.030 (25℃), viscosity 500-1500cSt, nD 1.448-1.458, cloud point 42℃ (1%), surface tension 23mN/m, 100% active, fully water-miscible, recommended 0.5-1.0% (2-4% for anti-stick), 25kg PE/200kg iron drum, non-haz, sealed room-temp 2-year shelf," and backed by "polyether-siloxane amphiphilic block + cold-water full-dissolve + 23mN/m low-tension spread," it serves as the "full-dissolve silicone anchor" for textile finishing, leather finishing, and waterborne coating/ink flow improvement.
Molecular Architecture: Polyether Block + Cold-Water Full-Dissolve + 23mN/m Low-Tension 3D Logic
The core competitiveness of IOTA 1291 stems from its "polyether segments (EO/PO tuned) grafted/blocked onto polysiloxane backbone" nonionic amphiphilic architecture:
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Polyether-Siloxane Amphiphilic Block: Polyether hydrophilic grants water solubility; siloxane hydrophobic backbone provides low-surface-energy slickness; precise ratio enables infinite miscibility at any ratio without phase separation, while retaining silicone lubricity.
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Cold-Water Full-Dissolve + Cloud 42℃: Fully transparent and dissolved in cold water (<42℃), ideal for cold-mix processes (textile finish, waterborne coating); above 42℃ the molecule dehydrates and precipitates onto fiber/leather surface as a silicone film—this "thermo-sensitive" property makes it auto-migrate to the substrate at high process temp, then redissolve on cooling without residue.
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23mN/m Low-Tension Spread: Surface tension only 23mN/m—rapidly spreads on skin/fiber/leather into an ultra-thin monolayer (~2-3nm), delivering triple benefits: soft, slick, antistatic; the film breathes without stuffiness.
Performance Leap: From "Amino Silicone Yellow" to "Polyether Silicone Full-Dissolve Slick"
Incorporating IOTA 1291 enables qualitative leaps:
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Textile Finishing: 0.5-1.0% on polyester/cotton/blends—soft, slick, crisp, dimensionally stable, antistatic, non-yellowing; cold-water full-dissolve enables energy-saving cold-mix.
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Leather Finishing: 2-4% as main component of leather slick agent—imparts slick, gloss, soft, comfortable hand; excellent compatibility with acrylic/PU topcoats.
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Waterborne Coating/Ink: 0.5-1.0% in acrylic adhesives/inks—lowers surface tension, improves flow, eliminates brush marks/orange-peel, gives flat glossy surface.
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Personal Care (Extension): 0.5-2.0% in cosmetics—forms uniform breathable protective film on skin, soft and smooth, good wet/dry combing (requires compliant blending).
Application Penetration: From Shirt Finish to Waterborne Ink
IOTA 1291 covers sectors triply sensitive to "cold-full-dissolve + slick + low-tension flow":
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Textile: Fabric softener, antistatic agent, sewing thread lubricant.
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Leather Chem: Leather slick agent, topcoat flow modifier, sofa/upper leather hand-feel enhancer.
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Waterborne Industry: Acrylic coating/ink flow modifier, waterborne adhesive surface-tension adjuster.
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Personal Care (Extension): Cream/lotion auxiliary slick agent (requires compliance).
IOTA Technical Guide: Cold-Mix Full-Dissolve, 0.5-4% Tiered Add
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Textile: Add IOTA 1291 directly into cold water (<42℃), stir to dissolve (0.5-1.0%), pad or dip fabric, dry and cure; for anti-stick finish raise to 2-4%.
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Leather: 2-4% in topcoat formula, pre-mix with acrylic/PU resin, then spray or roll-coat.
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Waterborne Coating/Ink: Add 0.5-1.0% at let-down stage, low-speed stir 10-15min; if system temp >42℃ note temporary precipitation (recovers on cooling).
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Taboo Red Line: Non-haz but moisture-seal (polyether end absorbs humidity → viscosity rises); avoid bulk coexistence with strong cationic substances (may flocculate); store 5-35℃, avoid >40℃ causing polyether oxidative yellowing.
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Storage: 25kg PE / 200kg iron drum; sealed room temp; shelf 2 years, retest appearance/viscosity/water-solubility and extend if qualified; non-haz transport.
Industry experts note that under textile finishing cold-mix trend, leather upgrading, and waterborne coating/ink flow demands, cold-water fully-soluble polyether silicones are upgrading from "Momentive/Shin-Etsu import followers" to "full-dissolve slick reference modified silicones." IOTA 1291, with its "100% active + 23mN/m + cold-water full-dissolve + cloud 42℃" hard metrics,
fills the domestic supply chain gap for water-soluble polyether-modified silicones in textile/leather/waterborne coating fields, providing a mass-producible path to replace imported Momentive L-series, Shin-Etsu KF-series for downstream textile auxiliaries, leather chemicals, and coating/ink enterprises. This confirms domestic PES oils are advancing steadily along "partially soluble → cold-full-dissolve → thermo-sensitive smart type," with growing technical say in fully water-soluble silicone key materials.
