In high-end protection fields such as anti-graffiti for buildings, precious metal anti-corrosion, rail transit, semiconductor insulating layers, electronic circuits, and gas-barrier waterproofing for plastic packaging, the four-dimensional indicators of "ultra-hard stain resistance — high transparency — ceramized temperature resistance — gas barrier and waterproofing" of functional coatings have always been the core contradiction restricting end-product service life and reliability. Traditional organic protective coatings (epoxy, polyurethane, acrylic), while mature in application, generally have pencil hardness below 3H, easily scratched and stained, and long-term temperature resistance below 200°C, failing to meet harsh working conditions such as rail transit and semiconductors. Ordinary inorganic ceramic coatings, while heat-resistant, are brittle, with poor adhesion (often grade 1-2) and low transparency, difficult to form thin films combining high transparency and ultra-hardness on glass, metal, and plastic. With high-end manufacturing's continuous upgrading of comprehensive demands for "9H ultra-hard, 800°C resistance, >90% visible light transmittance, gas barrier and waterproofing", finding a liquid coating material with "perhydropolysilazane as the main component, 20% solid content, cured density 1.6-2.0 g/ml, ceramized to SiOx via Si-N hydrolysis" has become the core proposition for the refinement of domestic inorganic nano coatings. Addressing this, Anhui IOTA Silicone Oil Co., Ltd. officially launches IOTA-PHPS Perhydropolysilazane Liquid Coating Material (Chinese synonym: Nano Hydrophilic Ultra-Hard Stain-Resistant Coating Material; English name: Hydrophilic Super Hard Stain Resistant Nano-Coating Materials). Characterized by "colorless transparent liquid; solid content 20%; solvent: n-butyl ether; 100% liquid density 1.16-1.31 g/ml, 20% liquid density 0.82-0.84 g/ml, cured density 1.6-2.0 g/ml", backed by "Si-N bond hydrolytic ceramization + 9H ultra-hard + high transparency grade 0 adhesion", it serves as the "ultra-hard choice" for high-end protection, achieving the leap from "organic coatings low hardness poor temperature resistance" to "perhydropolysilazane ceramized 9H ultra-hard". System Positioning: Perhydropolysilazane (PHPS) vs. Traditional Organic/Inorganic Coatings IOTA-PHPS belongs to the inorganic perhydropolysilazane system, distinct from traditional organic resin coatings and conventional inorganic ceramic coatings. Traditional organic coatings have C-C bond main chains, with low heat resistance ceiling and limited hardness; conventional inorganic coatings rely on high-temperature sintering, brittle and weak adhesion. PHPS innovatively uses Si-N bonds as reactive sites — through hydrolysis and polycondensation of Si-N bonds, it can be ceramized into a dense SiOx inorganic network at room temperature or with moderate heating, retaining the film-forming flexibility of organosilicones while obtaining the ultra-hardness and high-temperature resistance of inorganic ceramics, thoroughly solving the industry challenge of "organic coatings not heat-resistant and not ultra-hard, inorganic coatings brittle and opaque". Molecular Architecture: Si-N Hydrolytic Ceramization + Dense SiOx Network + Ultra-Hard High Transparency The core competitiveness of IOTA-PHPS stems from the precision curing design of perhydropolysilazane:

• Si-N Bond Hydrolytic Ceramization: The coating is mainly cured through hydrolysis of Si-N bonds. Under moisture or ammonia catalysis, Si-N bonds break and condense with water, gradually transforming into a Si-O-Si cross-linked network (SiOx), achieving "low-temperature ceramization" from organic polymer to inorganic ceramic.
• Dense SiOx Network: Cured density reaches 1.6-2.0 g/ml, coating composition is SiOx, forming a dense pore-free barrier; coating thickness >100 nm provides excellent anti-rust, alkali resistance, salt water resistance, and gas-barrier waterproofing for plastic packaging.
• Ultra-Hard High Transparency: After high-temperature curing, hardness reaches 8-10 GPa (pencil hardness 9H/Zhonghua, 6H/Mitsubishi), elastic modulus 100-130 GPa; visible light transparency >90%, fully preserving the original texture of the substrate while providing ultimate protection.

Performance Leap: From "Low Hardness Brittle Opaque" to "9H Ultra-Hard High Transparency Ceramized" Introducing IOTA-PHPS brings a qualitative leap to high-end protection:

• Ultimate Hardness: Pencil hardness 9H (Zhonghua test)/6H (Mitsubishi test), ammonia-cured hardness 3 GPa, high-temperature cured hardness 8-10 GPa, elastic modulus up to 100-130 GPa, scratch-resistant and stain-resistant.
• Ultra-High Transparency: Visible light transmittance >90%, colorless and transparent, suitable for scenes with strict appearance and light transmission requirements.
• Excellent Adhesion: Cross-cut adhesion grade 0, coating bonds firmly to substrate, no peeling or cracking.
• Extreme Temperature Resistance: Heat resistance up to 800°C in air, far exceeding organic coatings, suitable for high-temperature working conditions.
• Comprehensive Protection: Strong anti-rust, alkali resistance, and salt water resistance; gas-barrier and waterproof for plastic packaging; only acid resistance (10% hydrochloric acid) is weak, about one month.
• Dual Curing Modes: Room temperature curing for 7+ days (moisture curing); or rapid curing at 90% humidity, 150°C for 2 hours, with a flexible process window.

Application Penetration: From Anti-Graffiti to Semiconductor Insulation The application boundary of IOTA-PHPS covers all high-end scenarios requiring "ultra-hard high transparency + ceramized protection + gas barrier insulation":

• Anti-Graffiti for Buildings (Main Battlefield): The ultra-hard stain-resistant surface prevents graffiti paint from adhering, self-cleaning with rainwater, protecting curtain walls and exterior walls.
• Precious Metal Anti-Corrosion: Forms a dense SiOx barrier on gold, silver and other precious metals, blocking corrosive media and delaying oxidation and discoloration.
• Rail Transit: Withstands 800°C, weather-resistant and stain-resistant, used for long-term protection of train body exteriors.
• Semiconductor Insulating Layer: The SiOx inorganic network provides excellent insulation, suitable for passivation and insulation of electronic circuits and semiconductor devices.
• Gas-Barrier Waterproofing for Plastic Packaging: Forms a >100 nm dense layer on plastic packaging surfaces, blocking oxygen and moisture, extending the shelf life of food and pharmaceuticals.

IOTA Technical Guide: Clean Application, Low-Temp Sealing

• Application: Clean the substrate surface first; apply by spin coating, wiping, spraying, dipping; then cure at room temperature or high temperature (90% humidity, 150°C, 2h).
• ⚠️ Taboo: Must be used in a ventilated, dry environment with gloves, masks, and goggles; do not bring uncured PHPS near fire, humid air, or water; once cured, solvent cannot wash it off; consult professionals for waste liquid disposal; acid resistance is weak, avoid strong acid environments.
• Storage: Store below 10°C; unopened shelf life 1 year domestic, 6 months abroad; use up as soon as possible after opening; 0.5-10L metal drum sealed packaging, filled with xylene, dibutyl ether or dichloromethane.
• Handling: Colorless transparent liquid, 20% solid content (adjustable 2-20% as needed); 20% liquid density 0.82-0.84 g/ml for easy metering; coating thickness >100 nm controllable.

Industry Insight: In the field of inorganic nano coatings, the molecular design of IOTA-PHPS — "Si-N hydrolytic ceramization + dense SiOx network + 9H ultra-hard high transparency" — is the key path to achieving the trinity of "ultra-hard + high transparency + ceramized temperature resistance" — the introduction of Si-N bond hydrolysis mechanism solves the industry pain point of traditional organic coatings: "low hardness, poor high-temperature resistance", while the low-temperature ceramization to SiOx ends the application shortcoming of conventional inorganic coatings: "requiring high-temperature sintering, brittle and opaque". IOTA-PHPS, with "20% solid content + 8-10 GPa hardness + 9H pencil hardness + >90% transparency + 800°C temperature resistance + grade 0 adhesion" hard metrics, fills the key supply chain link for domestic perhydropolysilazane in high-end protection (building anti-graffiti/precious metal anti-corrosion/rail transit/semiconductor insulation/plastic packaging gas barrier), providing a mass-producible ceramized ultra-hard high-performance nano coating material for downstream construction, rail transit, semiconductor, and packaging enterprises. This confirms that domestic inorganic nano coatings are leaping toward "organic resin coating → inorganic ceramic coating → perhydropolysilazane low-temperature ceramization" in terms of hardness and temperature resistance, with growing technical say in high-end functional coating fields.