In silicone rubber, liquid silicone rubber, silicone gel and vinyl silicone oil synthesis, ordinary mono-vinyl silicone oil is only mono-functional, limiting chain extension efficiency and crosslink symmetry; octamethylcyclotetrasiloxane requires high-temp ring-opening, complex and slow; hydrogen silicone oil as crosslinker lacks flexible spacer, causing stress concentration at nodes; small vinyl monomers without siloxane backbone have poor compatibility with silicone matrix. For specs demanding "dual-end vinyl precise chain extension + siloxane flexible spacer + platinum-catalyzed hydrosilylation + high vinyl content", a strictly controlled vinyl-terminated disiloxane welds end reactivity and siloxane flexibility at one molecular node.
Addressing this,
Anhui IOTA Silicone Oil Co., Ltd. launches
IOTA 1002 Divinyltetramethyldisiloxane (Vinyl Double Heads). Chemical name divinyl tetramethyl disiloxane (1,3-diethenyl-1,1,3,3-tetramethyldisiloxane); CAS 2627-95-4; EINECS 220-099-6; formula [(CH₃)₂C₂H₃Si]₂O; MW 186.40. Appearance colorless transparent liquid. Boiling point 133-139℃. Density 0.818 g/cm³. Refractive index 1.4118-1.4123. Purity 99.5%. Vinyl content 29.0%. Water solubility insoluble. Used as vinyl dual-end additive for silicone rubber, silicone gel, LSR, vinyl silicone resin, vinyl silicone oil, intermediate for platinum complex production. 20kg plastic drum, 160kg iron drum (custom packaging available). Transported as dangerous product. Store in cool dry ventilated warehouse. Brand IOTA.
System Positioning: Divinyltetramethyldisiloxane Among Vinyl Silane Families
Within vinyl silanes and siloxane intermediates, IOTA 1002 is a dual-end vinyl-terminated disiloxane, distinct from mono-vinyl silicone oil (mono-functional, limited extension), octamethylcyclotetrasiloxane (cyclic, needs ring-opening), tetravinylsilane (no siloxane bridge, overly rigid), hydrogen silicone oil (no vinyl, crosslinker only). IOTA 1002 uses two vinyl groups capping a tetramethyldisiloxane segment at both ends, positioning as "silicone rubber and gel dual-end chain extender + LSR vinyl crosslink regulator + vinyl silicone resin/oil synthesis building block + platinum complex ligand intermediate", rather than mere end-capper or solvent.
Molecular Architecture: Dual-Si Dual-Vinyl + Symmetric Oxygen Bridge + Purity 99.5% + Vinyl 29.0%
IOTA 1002 core is oxygen bridge linking two silicons, each bearing two methyls and one vinyl, formula [(CH₃)₂C₂H₃Si]₂O, MW 186.40. Dual-end vinyls provide two reactive anchors for platinum-catalyzed hydrosilylation with hydride crosslinkers, embedding flexible siloxane segments into network; tetramethyldisiloxane backbone as short spacer grants flexibility and low viscosity; density only 0.818 g/cm³, far below water, indicating dense methyl packing and large free volume; RI 1.4118-1.4123 extremely low, fitting optical-grade transparent silicone; purity 99.5% and vinyl 29.0% ensure batch-to-batch activity consistency.
Performance Leap: From "Mono-End Shallow Extension, No-Spacer High Stress" to "Vinyl Dual-Terminated, Siloxane Bridging"
With IOTA 1002, four-way synergy: dual-end extension—both vinyls simultaneously enter platinum-catalyzed addition, precisely inserting linear segments into silicone network, tuning crosslink density and tensile properties; flexible spacer—tetramethyldisiloxane bridge more flexible than direct carbon link, reducing stress concentration at crosslink points, lifting resilience and tear strength; platinum complex intermediate—vinyl coordinates with platinum catalyst forming stable complex, serving as key intermediate in platinum complex production, modulating catalytic activity and lifetime; process tolerance—bp 133-139℃ moderate, preventing volatile loss during reaction while allowing recovery of excess.
Application Penetration: From Silicone Chain Extension to Platinum Complex Synthesis
IOTA 1002 covers four core scenarios.
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Silicone rubber & gel dual-end extension: addition-cure LSR, silicone gel—MW control and flexibility; pre-mix with hydride crosslinker, platinum catalyze, control hardness and rebound.
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Vinyl silicone resin & oil synthesis: vinyl-terminated silicone oil, vinyl resin—dual vinyl introduction; participate in polymerization or as end-blocker.
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Platinum complex production: platinum catalyst ligand intermediate—vinyl coordination; synthesize platinum-vinyl complex catalyst, stabilizing active center.
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Specialty encapsulation: optically clear silicone, flexible electronic packaging—low RI and flexibility; fits dual requirements of light transmission and elasticity.
⚠️ Taboo: transported as dangerous product, keep from fire/heat; vinyl highly reactive, avoid mixing with peroxides/strong oxidants; platinum system strictly prevent poisoning by sulfur, phosphorus, amines causing no-cure; store sealed in cool dry ventilated warehouse.
IOTA Technical Guide: 20kg Plastic / 160kg Iron Drum, Hazardous Management
IOTA 1002 is colorless transparent liquid, standard 20kg plastic drum or 160kg iron drum (custom available). As dual-end extender add per formula premixed with hydride component; as platinum complex intermediate participate in coordination. Seal store cool dry ventilated, transported as dangerous product.
Industry Insight: Vinyl dual-end siloxane selection is not the higher vinyl content the better, but using dual vinyl for chain extension efficiency, siloxane segment length for flexibility, purity for batch stability, boiling point for process temperature window. For silicone formulators and platinum catalyst chemists, IOTA 1002 uses one dual-vinyl disiloxane across chain extension, synthesis and coordination catalysis, taking vinyl dual-termination and siloxane bridging as batch-checkable anchors, securing crosslink control and product performance simultaneously.
