In protection for aero-engine bays, EV fast-charge terminals, industrial flues, and premium non-stick molds, the old fault line is: "organic coatings die below 800℃, ceramic glazes won't stick to plastic/glass." Epoxy/fluorocarbon blister at 300℃, regular silicone resins powder at 500℃; traditional ceramic spray can't film on PC or PMMA. As EV charge pins, PV coating rollers, and semiconductor etch chambers impose stricter demands for "liquid application, low-temp curable, high-temp ceramizable, universal on metal/glass/plastic," sourcing a vinyl polysilazane, Mn1200-1400, viscosity 10-40cP, 800℃ ceramic yield 50-60%, composite rating <1600℃ has become a core proposition for next-gen heat-resistant coatings.

Addressing this "organic-to-ceramic continuum" pain point, IOTA (Anhui IOTA Silicone Oil Co., Ltd.) officially launches Organic Polysilazane IOTA 9118 (alias: Ceramizable Precursor Polymer). With specs "pale yellow clear liquid, solids ≥99%, density 0.98-0.99, viscosity 10-40cP, cured hardness 6-7H, hydrophobic angle 100-105°, visible transmit >95%, cross-cut 0-grade," and backed by "Si-N backbone + terminal vinyl + low-temp curable / high-temp ceramizable" PDC nature, it emerges as the "Liquid Ceramic Seed" for metal anti-corrosion, glass/mold release, plastic heat modification, and SiCN CMC precursors.

Molecular Precision: Si-N Backbone with Vinyl PDC Seed

The core competitiveness of IOTA 9118 stems from its "repeating Si-N backbone + side/terminal vinyl (Vi) + trace special additive" precursor topology:

• Vinyl Low-Temp Cure: Main group Si-CH=CH₂ enables four routes—①no initiator 250℃+ thermal radical; ②+peroxide (DCP class) 120-180℃ downstep; ③Pt catalyst 80-100℃ hydrosilylation (if Si-H present or self-couple); ④+cleavage photoinitiator for UV cold cure (fit PC/PMMA). Room-temp 3-day stand gives only soft film—active cure mandatory.
• Si-N High-Temp Ceramization: Cured body pyrolyzed under N₂/Ar yields amorphous SiCN <1400℃, crystallizes to SiC+Si₃N₄ >1400℃; air gives SiOCN, NH₃ gives Si₃N₄-rich. 800℃ ceramic yield 50-60%, cured ceramization 60-70%, linear shrink <1%, ceramic density 1.60-2.00 g/cm³.
• 10-40cP Penetration Viscosity: Far below regular silicone resins (thousands cP); impregnates glass fiber, seeps microcracks, sprays PC without sag; miscible with epoxy-silicone/silicone resins to lift hardness/speed.
• Yellow-to-Colorless: Vinyl + additive tint liquid pale yellow; during cure/pyrolysis additive reacts off, dry film colorless clear (>95% transmit)—no aesthetic penalty.

Performance Leap: From 800℃ Varnish to 1600℃ Composite

Used alone or as composite topcoat:

• Solo Varnish: Single coat service <800℃ (oven inner wall, flue, engine sensor shroud); 800℃ non-flammable, non-oxidizing, hydrophobic self-clean; thicker = better protection but >100μm risks high-temp crack—control thickness or add fillers.
• Composite Topcoat: With ceramic/metal fillers withstands <1600℃ flame face (metallurgy jig, rocket nozzle liner, PV CVD roller); SiCN layer blocks O₂/H₂O with excellent chemical masking.
• Universal on Plastic/Glass: Pt-cured 80-100℃ on PP/PC/PVC/PMMA without brittle crack—"high-temp armor" for heat-sensitive substrates; glass mold gets release + heat dual effect.
• Binder & CMC Impregnation: Precursor impregnation for ceramic matrix composites (CMCs), repeated pyrolysis densification to SiCN fiber-reinforced ceramic; non-flammable adhesive for metal/graphite.

Application Penetration: From Engine Bay to PC Lens Window

IOTA 9118 locks onto scenes doubly sensitive to "organic application + ceramic end-state":

• High-Temp Coatings: Auto exhaust periphery, industrial oven, injection barrel, chimney anti-corrosion oxidation layer.
• Electronics & Semiconductor: Etch chamber parts, sensor protection, battery fast-charge terminal heat-insulating film.
• Glass & Mold: Annealing roller, die-casting mold release heat layer, lab crucible inner coat.
• Composites: CMC impregnation, non-flammable laminate, aerospace tile precursor, low-surface-energy kitchenware.
• Plastic/Metal Modification: PC cam window heat-hardening, Al heatsink anti-oxidation, PP appliance flame-ceramizing.

IOTA Process Guide: Block Water/Alcohol, Control Cure, Ramp Pyrolyze

• Application: Substrate degrease/dewater; dilute IOTA 9118 with dry alkane/ether/ketone/ester (no alcohol/water/acid-base protonics); spray/dip/brush, wet film <100μm per pass.
• Cure 3-Choose: ①250-350℃ air bake 2-5h (no initiator); ②+peroxide 120-180℃×1-2h; ③+Pt 80-100℃×1-2h; UV type +1173-class initiator 365nm.
• Pyrolysis Ceramization: Cured part in furnace, N₂/Ar 5℃/min to 800℃ soak (amorphous SiCN), continue >1400℃ for crystalline; air path gives SiOCN directly.
• Storage Don'ts: 100ml/1L/5L metal drum; 0-20℃ sealed nitrogen, strictly dry after opening; uncured wash with acetone/solvent oil, cured un-washable; 1-year shelf.

Industry Expert Insight: Experts note that in the localization wave of PDC (polymer-derived ceramics), vinyl polysilazane is the shortest path linking "liquid painting" to "SiCN ceramic." IOTA 9118—with "Mn1200-1400 + Vi activity + 800℃ yield 50-60% + 1600℃ composite"—aligns with international PSZ routes (Clariant/Wuxi Juhe philosophy), filling the domestic blank of universal ceramizable precursor for metal/plastic/glass, and giving EV/semiconductor/aerospace a one-stop base from "paint on" to "fire to ceramic." This milestone signifies that domestic polysilazanes now possess hard power—from following to parallel running—on the "organic-inorganic continuous conversion" track.