In the polymer-derived ceramic (PDC) resin spectrum, the "low-DP short-chain design" and "Si–N backbone pyrolysis-ceramization path" jointly dictate fast crosslink at 120-180℃, infiltration depth into metal/ceramic/graphite, and ceramic yield at 1500℃ extreme. Predecessor IOTA 9118 (Mn 1200-1400) has low viscosity but longer cure cycle (250-350℃×0.5-2h); higher-MW solid polysilazanes are too viscous for fiber preform impregnation. As CMC preform impregnation, 1500℃ high-temp structural adhesives, and metal/graphite anti-oxidation coatings demand "low-vis short-cure (2-5h), Mn<1000, ceramic yield >75% at 800℃, Pt-curable at 80℃," sourcing a liquid polysilazane with colorless-to-light-yellow appearance, >99% solids, 10-30cP viscosity, Mn 700-900, 6-month shelf has become the core gap for domestic oligomeric polysilazane localization. Addressing this "oligomer short-cure" pain point, Anhui IOTA Silicone Oil Co., Ltd. (IOTA) officially launches Organic Polysilazane IOTA 9108 (alias: ceramicable precursor polymer, equivalent Evonik Durazane low-visc series / Merck Liquicoat PN oligomeric). Characterized by "colorless to light-yellow liquid, solids >99%, viscosity 10-30cP, Mn 700-900, ceramic density 1.60-2.00g/cm³, cured ceramic yield >75% (800℃), 0.5-20L PE drum, opened N₂-seal >2 months / unopened 6 months," and backed by "Si–N oligomer short-chain fast-cure + Pt/thermal dual-cure + high-yield SiCN," it serves as the "oligomeric silazane anchor" for CMCs, 1500℃ high-temp adhesives, and anti-oxidation ceramic coatings. Molecular Architecture: Oligomer Short-Chain + Si–N Fast-Cure + High-Ceramic-Yield 3D Logic The core competitiveness of IOTA 9108 stems from its "Mn only 700-900 liquid polysilazane oligomer, backbone of –Si(R)–NH– repeating units" PDC architecture:

• Oligomer Short-Chain Fast-Cure: Mn 700-900 means only 5-8 repeat units—short chains, high end-group density; thermal crosslink at 120-180℃ completes in 2-5h (far faster than 9118's 250-350℃×0.5-2h); with Pt catalyst drops to 80-100℃×2-5h, fits temperature-sensitive substrates (assembled electronics, plastic parts needing local heat treatment).
• Si–N Backbone High Ceramic Yield: Si–N bond ~470kJ/mol; post-cure 800℃ ceramic yield >75% (plain pyrolysis >55%), far above most polysiloxanes (<40%); in air 800℃ forms SiOCN, under inert gives SiC+Si₃N₄ multiphase ceramic—continuous service to 1500℃.
• Polar Solvent Wide Dilution: Miscible with various polar/non-polar anhydrous solvents (alkanes, ethers, ketones, esters) for fiber preform dip or thin-film spray; but strictly no water/alcohol (Si–N hydrolyzes/alcoholyzes releasing NH₃ → gel), application must be bone-dry.

Performance Leap: From "Long-Chain Slow-Cure" to "Oligomer Short-Cure" Incorporating IOTA 9108 enables qualitative leaps:

• CMC Precursor Impregnation: 10-30cP penetrates CF/SiC-fiber preforms, 120-180℃ locks in, repeated impregnate-pyrolyze (PIP) densifies to SiCN CMC with bulk density >2.0g/cm³—fits aero-engine combustor liners.
• 1500℃ High-Temp Adhesive: Blended with SiC powder, BN filler, Pt-cured 80-100℃, retains bond strength >5MPa at 1500℃ in inert—fits high-temp furnace part joining, thermocouple sheath sealing.
• Metal/Graphite Anti-Oxidation: Coated on graphite crucible/moly alloy, 200℃×2h cure → 800℃×100h oxidation gain <3%, dense SiOCN oxygen-barrier extends graphite heater life 3-5×.
• Corrosion-Heat Hybrid: 5-15% physical blend into epoxy lifts heat ceiling to 400-500℃ while keeping epoxy adhesion and workability.

Application Penetration: From Aero-Engine to Graphite Crucible IOTA 9108 covers sectors triply sensitive to "oligomer fast-cure + high ceramic yield + 1500℃ heat":

• Ceramic Matrix Composites: CMC precursor (PIP process), fiber preform impregnation, SiC fiber interphase.
• High-Temp Bonding: 1500℃ structural adhesive, refractory joining, thermocouple/sheath end-seal.
• Anti-Oxidation Coating: Graphite crucible/C-C composite anti-oxidation, Mo/Nb alloy high-temp protection.
• Hybrid & Impregnation: Organic-inorganic hybrid resins, thermoset modifier, ceramic preform infiltration.

IOTA Technical Guide: Dry Alcohol-Avoid, Pt-Low-Temp

• Thermal Cure: 120-180℃×2-5h (air or inert both OK); time depends on temp and catalyst level; recommended for thick coats and impregnated parts.
• Pt Catalyzed Cure: Add Pt catalyst (Karstedt) → 80-100℃×2-5h; fits low-temp substrates or fast lines; note Pt may complex with N–H and deactivate—pilot first.
• Solvent Dilution: Dilutable with anhydrous toluene, xylene, THF, acetone; strictly no water-bearing alcohols (MeOH/EtOH/IPA will alcoholyze Si–N and kill activity).
• Taboo Red Line: Uncured product: no water, humid air, alcohols, acid, base, or protic substances (Si–N hydrolysis/alcoholysis releases NH₃ → gel); wear gloves, mask, goggles; wipe tools with acetone/solvent oil before cure—solvent-won't-wash after cure.
• Storage: 0.5-20L PE drum; unopened shelf 6 months (recommend 0-20℃ refrigeration); opened under sealed low-temp dry conditions life >2 months; general chemical management.

Industry experts note that under the overlapping pull of domestic CMC aero-engine liners, high-temp adhesives shifting "organic replacing inorganic," and graphite anti-oxidation long-life demand, oligomeric polysilazanes are upgrading from "Evonik Durazane followers" to "short-cure high-yield precursor reference resins." IOTA 9108, with its "Mn 700-900 + >75% cured ceramic yield + 10-30cP low-vis + 1500℃ resistance" hard metrics, fills the domestic supply chain gap for oligomeric organic polysilazanes in CMC impregnation and 1500℃ high-temp adhesive fields, providing a mass-producible path to replace imported Evonik Durazane low-visc series, Merck Liquicoat PN for downstream composite and high-temp material enterprises. This confirms domestic PDC resins are advancing steadily along "oligomerization → short-cure → high-ceramic-yield," with growing technical say in 1500℃-class extreme-protection key materials.