In the high-end functional coating spectrum, organic silicone resins (e.g., IOTA ST6 nano-ceramic resin) achieve 5H at RT-cure, but their Si-O-Si organic network decomposes under extreme conditions >500℃, strong corrosion, and long-term weathering; polysilazane coating fluids (e.g., IOTA 9970) focus on car-paint crystalline ceramics, hardly balancing large-area industrial application with semiconductor-grade purity. Perhydropolysilazane (PHPS), as an inorganic polymer precursor with ≡SiH-NH-Si≡ backbone, undergoes Si-N bond hydrolysis (≡Si-NH-Si≡ + H₂O → ≡Si-O-Si≡ + NH₃↑) under moisture/heat catalysis, in-situ ceramicizing into high-purity SiOx inorganic network — achieving 8-10GPa hardness (9H ChungHwa / 6H Mitsubishi pencil), 100-130GPa elastic modulus, >90% visible transmittance, cross-cut 0-grade adhesion, 800℃ air heat resistance, rust/alkali/saltwater resistance. Previously, high-purity PHPS raw materials were dominated by German and Japanese suppliers, with high import prices and long delivery cycles restricting wider industrial adoption. As anti-graffiti buildings, precious-metal anti-corrosion, rail transit, semiconductor insulation, electronic circuit protection, and plastic-packaging gas/water barrier surge in demand for "inorganic ultra-hard, hydrophilic easy-clean, 800℃-rated, O₂/H₂O high barrier" bundles, sourcing a "20% solids n-butyl ether solution, RT/moist/heat multi-mode curable, domestically mass-producible" perhydro polysilazane has become the core proposition for high-end inorganic ceramic coating localization. Addressing this "ceramic seed" pain point, Anhui IOTA Silicone Oil Co., Ltd. (IOTA) officially launches Perhydro Polysilazane (Inorganic Polysilazane) IOTA PHPS (synonym: Nano Hydrophilic Super Hard Stain-Resistant Coating Material). Characterized by "colorless transparent liquid, solids 20% (tunable 2-20%), n-butyl ether solvent, 100% liquid density 1.16-1.31g/ml, 20% liquid density 0.82-0.84g/ml, cured density 1.6-2.0g/ml, coating composition SiOx, thickness >100nm, 9H ChungHwa/6H Mitsubishi pencil, >90% visible transmittance, 0-grade cross-cut adhesion, 800℃ air heat resistance, 0.5-10L metal drum sealed, <10℃ storage, 1yr domestic/6mo export shelf", and backed by "perhydro Si-N backbone + Si-N hydrolysis ceramicization + multi-mode cure," it serves as the "inorganic ceramic coating seed" for anti-graffiti, precious-metal anti-corrosion, rail transit, semiconductor insulation, electronic circuits, and high-barrier packaging. Molecular Architecture: Perhydro Si-N Backbone + Hydrolytic Ceramicization + Multi-Mode Cure 3D Logic The core competitiveness of IOTA PHPS stems from its "≡SiH-NH-Si≡ perhydro polysilazane inorganic backbone + moisture/heat-catalyzed Si-N hydrolysis + in-situ ceramicized SiOx network" precise composite architecture:

• Perhydro Si-N Inorganic Backbone: PHPS molecules are rich in Si-H and N-H active groups, a true "inorganic polymer" — no carbon skeleton, fundamentally distinct from all organosilicones. This essence determines zero organic residue post-cure, high coating cleanliness, suitable for fine-chemical and semiconductor high-purity production environments.
• Si-N Hydrolytic Ceramicization: Cure mechanism is Si-N hydrolysis: ≡Si-NH-Si≡ + H₂O → ≡Si-O-Si≡ + NH₃↑. Ammonia-catalyzed RT 7 days or 90%RH/150℃/2h forms film; high-temp cure (>300℃) dehydrogenates then oxidizes, creating dense SiOx network (>100nm) — hardness jumps to 8-10GPa, 9H pencil.
• Multi-Mode Cure Adaptability: Supports three cure pathways — ① RT cure (>7 days, heat-sensitive substrates); ② moist accelerated cure (90%RH/150℃/2h, recommended for industrial production); ③ high-temp cure (200-300℃ accelerated conversion), flexibly matching plastics, metals, glass, ceramics, polymers and various production lines.

Performance Leap: From "Organic Coating" to "Inorganic Ceramic Seed" Incorporating IOTA PHPS enables qualitative leaps:

• 9H Inorganic Ultra-Hard: Post-HT-cure hardness 8-10GPa, elastic modulus 100-130GPa, pencil 9H (ChungHwa)/6H (Mitsubishi) — scratch/wear resistance far exceeding organic silicone coatings and fluorocarbon paints.
• >90% High Transparency: Visible light transmittance >90%; colorless transparent, no haze, no yellowing — invisible protection film for optical devices and transparent substrates.
• 0-Grade Adhesion: Top cross-cut rating; seamless bonding to metals (aluminum, stainless steel), ceramics, polymers (PP, PC, PVC); no peeling or flaking under long-term use.
• 800℃ Heat Resistance: Stable at 800℃ in air; oxidation-resistant and thermal-shock-resistant at high temp, no decomposition or powdering.
• Hydrophilic Easy-Clean + Anti-Graffiti: Surface Si-OH/Si-O⁻ imparts hydrophilicity; water spreads to carry away contaminants; dense smooth surface resists ink and paint adhesion — single anti-graffiti application protects >5 years.
• Strong Corrosion Resistance & Barrier: Excellent rust, alkali, saltwater resistance; 10% hydrochloric acid tolerance weaker (~1 month); on PET film, oxygen transmission reduced 90%, water vapor 85%, extending food shelf life.
• Electrical Insulation: Dielectric strength >30kV/mm, volume resistivity >10¹⁴Ω·cm — ideal for semiconductor insulation layers and electronic circuit protection.
• Vs IOTA 9970/ST6: 9970 is polysilazane car-paint coating (cryst SiO₂ ceramic hard film, 5H, car paint); ST6 is silicone resin nano-ceramic (RT-cure 5H, multi-substrate universal); PHPS is perhydro inorganic polysilazane (Si-N backbone hydrolytic ceramicization, 9H/800℃, anti-graffiti/semiconductor insulation/barrier high-end industrial) — together they form a "9970 car-paint crystal shield / ST6 multi-substrate ceramic armor / PHPS inorganic ceramic seed" coating functional triangle.

Application Penetration: From Building Anti-Graffiti to Semiconductor Insulation IOTA PHPS covers six high-end fields sensitive to "inorganic ultra-hard, high transparency, high-temp resistance, anti-corrosion, barrier, insulation":

• Building Anti-Graffiti: Landmark buildings, curtain walls, historical façades — dense smooth surface resists ink and paint; single application protects >5 years, easy to clean.
• Precious Metal Anti-Corrosion: Silver, copper and other precious metals isolated from air and moisture, preventing oxidative discoloration, maintaining long-term luster.
• Rail Transit: Vehicle body and component anti-corrosion wear-resistant coatings, extending service life, resisting extreme climate and chemical corrosion.
• Semiconductor Insulation: ICs, MEMS devices, power semiconductor surface passivation layers, with high dielectric strength, low dielectric constant and excellent thermal stability; ideal insulation for HVLEDs and MMICs.
• Electronic Circuit Protection: PCB conformal coating, withstands reflow soldering without decomposition; flexible electronics encapsulation barriers moisture and oxygen.
• Plastic Packaging Barrier: PET film coating, 90% OTR reduction, 85% WVTR reduction, extending food/pharma packaging shelf life.
• New Energy Extension: Li-ion battery separator coatings (thermal stability & puncture resistance), PV module encapsulation (extremely low water-oxygen transmission).

IOTA Technical Guide: Clean Substrate, Pick-One-of-Three Cure, Low-Temp Sealed Storage

• Substrate Prep: First clean and degrease substrate surface, ensuring contaminant-free (recommend ultrasonic cleaning + plasma activation, surface energy >50mN/m).
• Application: Spin coating (semiconductor/optical), spraying (large structures), wiping, dipping (complex parts); wet film 150-200nm, post-cure >100nm.
• Pick-One-of-Three Cure:
  • ① RT cure: 25℃/RH>60% or dilute ammonia spray catalyst, 7 days (heat-sensitive plastics/aluminum laminates), hardness 3GPa/9H ChungHwa;
  • ② Moist accelerated cure: 90%RH/150℃/2h (general metal parts), hardness 8-10GPa;
  • ③ HT cure: 300-400℃/0.5-1h (rail/semiconductor, near-ceramic properties).
• Tool Cleaning: Once cured, PHPS cannot be removed by solvent; promptly wipe tools with acetone or solvent oil after application.
• Taboo Red Line: Apply in ventilated dry environment, away from ignition/moist air/water — Si-N bonds extremely sensitive to moisture; uncured product must not approach water sources; keep uncured PHPS away from fire; consult professionals for waste liquid disposal; wear gloves, masks, protective goggles.
• Storage: 0.5-10L metal drum sealed (typically filled with xylene, dibutyl ether or dichloromethane); store below 10℃, unopened shelf life 1yr domestic / 6mo export, use quickly after opening; handle as general chemical, avoid eye/skin contact.

Industry Expert Insight: Over the past five years, domestic institutions including the Institute of Chemistry at the Chinese Academy of Sciences have made breakthroughs in PHPS synthesis, purification and scaled production. The localization rate of general-purpose PHPS for electronic isolation and RT corrosion protection has reached ~90%, while mid-to-high-end industrial anti-corrosion PHPS accounts for ~65% of the Chinese market, already being supplied in volume to new energy, semiconductor, aerospace and other advanced manufacturing sectors. IOTA PHPS, with "perhydro inorganic backbone + Si-N hydrolytic ceramicization + 20% n-butyl ether solution + 9H/800℃ + multi-mode cure" hard metrics, fills the domestic supply chain for inorganic ceramic coatings based on perhydro polysilazane in anti-graffiti / precious-metal anti-corrosion / rail transit / semiconductor insulation / electronic circuits / high-barrier packaging, providing a mass-producible import-substitution solution for downstream high-end manufacturers. This confirms domestic specialty polysilazanes are leaping along "organosilicone (soft coating) → polysilazane (crystalline ceramic) → perhydro inorganic polysilazane (liquid ceramic precursor, Si-N hydrolysis in-situ ceramicization)", with continuously growing technical say in high-end surface protection and semiconductor critical materials.