In liquid fluorosilicone rubber, fluorosilicone potting and organic material weather-resistant modification, ordinary vinyl silicone oils lack fluorine and swell severely in fuel and solvents; conventional fluorosilicones lack vinyl groups and cannot undergo addition cure, relying only on peroxide or condensation with narrow process windows; acrylate modifiers offer limited weatherability and low surface energy, yellowing and chalking outdoors; traditional release agents lack fluorosilicone synergy, giving unstable release force and residue risk. For demands of "vinyl reactivity + trifluoropropyl media resistance + wide viscosity range + multi-organic substrate modification", a strictly controlled vinyl-terminated fluorosilicone polymer welds addition cure and chemical resistance at one siloxane backbone. Addressing this, Anhui IOTA Silicone Oil Co., Ltd. launches IOTA-25V Vinyl Fluorosilicone Oil. Vinyl-terminated poly(trifluoropropyl methylsiloxane); homo- and co-polymer structures; colorless to pale yellow transparent oily liquid. Fluorine content: homopolymer 100%, copolymer 10%~90%. Dynamic viscosity (25℃): homopolymer 100~500,000 mPa·s, copolymer 100~500,000 mPa·s. Vinyl content: homopolymer 0.01%~8.0%, copolymer 0.01%~16.0%. Volatiles (200℃, 4h) ≤5%. Uses: main raw material for injection-molded liquid fluorosilicone rubber, fluorosilicone potting compounds, fluorosilicone release agents; reacts with polyurethane, acrylic and other organic materials to modify plastics, resins, paints and coatings for weatherability, aging resistance, UV resistance and toughness. Package: plastic or coated steel pail 5kg/25kg/250kg. Store cool dry ≤35℃, 12 months, non-hazardous transport. Brand IOTA. System Positioning: Vinyl Fluorosilicone Among Reactive Fluorosilicones Within functional fluorosilicone polymer families, IOTA-25V is a vinyl-terminated poly(trifluoropropyl methylsiloxane), distinct from ordinary vinyl silicone (no fluorine, swells in fuel), conventional fluorosilicone (no vinyl, no addition cure), methyl silicone oil (no reactive group, physical lubrication only), hydride fluorosilicone (provides hydride not vinyl, requires pairing vinyl substrates). IOTA-25V uses trifluoropropyl side groups for oil/solvent resistance, vinyl termination for dual-channel Pt-catalyzed addition and organic copolymerization, positioning as "main raw material for injection liquid fluorosilicone rubber + base polymer for fluorosilicone potting + film former for fluorosilicone release agents + weather/toughness modifier for plastics, resins and coatings", rather than simple plasticizer or slip agent. Molecular Architecture: Vinyl-Terminated + Trifluoropropyl Side Groups + Homo 100%/Co 10~90% + Viscosity 100~500,000 IOTA-25V core is a linear fluorosilicone chain vinyl-terminated. Trifluoropropyl density sets media resistance: homopolymer at 100% fluorine gives extreme fuel/solvent resistance and lowest surface energy for aviation sealing and harsh chemical environments; copolymer at 10%~90% balances oil resistance with flexibility and compatibility. Vinyl termination content homopolymer 0.01%~8.0%, copolymer 0.01%~16.0% directly corresponds to addition crosslink density or graft density onto organic resins. Viscosity spans 100~500,000 mPa·s at 25℃, fitting everything from low-viscosity potting to high-viscosity injection molding; volatiles ≤5% at 200℃/4h ensures low outgassing in high-temp cure and long-term service; vinyl termination directs reaction more efficiently than pendant vinyl, minimizing intra-chain cyclization side reactions. Performance Leap: From "Oil-Resistant But Not Curable, Curable But Not Oil-Resistant" to "Vinyl Fluorosilicone, Multi-Process Versatility" With IOTA-25V, two-way synergy: addition cure—vinyl adds across hydride silicone oil under Pt catalysis, building a 3D oil-resistant elastomeric network perfectly matching rapid injection-molding cycles of liquid fluorosilicone rubber, yielding high resilience, low compression set and excellent fuel immersion resistance; also for fluorosilicone potting and release agents, forming films with fluorine low-surface-energy and silicone flexibility without migration. organic modification—vinyl reacts with polyurethane, acrylic and other organics via unsaturation or active hydrogen, grafting fluorosilicone segments to create new hybrid materials with weatherability, aging/UV resistance and enhanced toughness, widely used in plastic toughening, resin modification, anti-fouling paints and coatings. Application Penetration: From Injection Molding to Organic Coatings IOTA-25V covers four core scenarios.

• Liquid fluorosilicone rubber: injection-molded fluorosilicone parts—rapid addition cure; aviation fuel seals, automotive oil-resistant gaskets, high-resilience fluorosilicone rollers.
• Fluorosilicone potting and release: potting compounds, release agents—media-resistant filming; electronic component oil-resistant potting, PSA fluorosilicone release coating.
• Organic material modification: reaction with polyurethane, acrylic—weather-resistant toughening; plastic alloys, anti-fouling coatings, outdoor topcoats, resin composites.
• Wide-viscosity process fit: 100 to 500,000 mPa·s—process coverage; from vacuum potting to compression injection.

⚠️ Taboo: keep neutral, avoid acid/alkali to prevent acid-catalyzed premature vinyl reaction or base-catalyzed siloxane degradation; store ≤35℃ sealed to avoid vinyl self-polymerization or siloxane hydrolysis; select homo vs co by oil resistance grade—homo for aviation, co for general modification; match vinyl content to hydride crosslinker stoichiometry, large deviation causes under- or over-cure; non-hazardous but still fire/heat protected. IOTA Technical Guide: 5kg/25kg/250kg Pail, Sealed ≤35℃ for 12 Months IOTA-25V is colorless to pale yellow transparent oily liquid. Liquid fluorosilicone formulation: use as base polymer, blend with hydride silicone oil at vinyl/hydride stoichiometry, cure by Pt-catalyzed injection or compression molding; potting: select viscosity grade and mix directly; release agent: dilute with solvent, coat and heat-cure; organic modification: meter vinyl content for copolymerization/grafting with PU/acrylic prepolymers. Package: plastic or coated steel pail 5kg/25kg/250kg. Store cool dry ≤35℃, shelf life 12 months, non-hazardous transport. Industry Insight: Vinyl fluorosilicone selection is not the higher vinyl the better, but using trifluoropropyl ratio for oil resistance grade, vinyl content for crosslink density and graft rate, viscosity for process method, termination structure for reaction efficiency. For fluorosilicone formulators, potting engineers and organic modification chemists, IOTA-25V uses one vinyl fluorosilicone oil across addition-cure liquid rubber, potting/release and organic weather modification, taking vinyl fluorosilicone and multi-process versatility as batch-checkable anchors, securing media resistance and reactivity simultaneously.