fumed silica for fire rated glass

Colloidal Silica for Fire-Resistant Glass Manufacturer: Shandong Zhonglian Chemical Co., Ltd. 1. Core Pain Points for Curtain Wall Fire Glass Exterior building fire-rated glass curtain walls face long-term exposure to UV radiation, temperature fluctuations and weather erosion, with three major industry-wide challenges: 1.Insufficient outdoor weather resistance, leading to yellowing, whitening and chalking after 3~5 years and compromising facade appearance. 2.Bubbles, flow marks and uneven thickness easily occur during pouring of large-size glass, resulting in low production yield. 3.Curing layer cracking and delamination under thermal stress, plus poor compatibility with curtain wall structural adhesives, creating potential safety hazards. 2. Exclusive Performance Upgrades for Curtain Wall Grade Developed specifically for curtain wall scenarios, it delivers four key performance breakthroughs on top of general-purpose products: 1.Super Weathering and Aging Resistance Adopting surface densification modification technology, after 2000 hours of QUV accelerated aging testing, light transmittance loss is ≤3%, with no yellowing, chalking or peeling. Normal outdoor service life is ≥25 years, suitable for coastal and high-altitude areas with strong UV radiation. 2.Large-Size Pouring Adaptability Optimized rheological properties and curing shrinkage, with curing volume shrinkage ≤2.5%. It enables bubble-free, flow-mark-free uniform pouring for ultra-large glass panels up to 2.4m×3.6m, increasing large-panel yield by over 20%, and adapting to industrial prefabrication of unitized curtain walls. 3.High-Strength Structural Compatibility Bonding strength with glass substrates after curing ≥2.8MPa. The thermal expansion coefficient is highly matched to glass substrates, with no cracking or delamination after 50 thermal cycles from -40℃ to 80℃. It has good compatibility with silicone structural adhesives and sealants, causing no corrosion or swelling. 4.High-Transparency Facade Effect Visible light transmittance ≥90%. After curing, the refractive index matches glass, with no haze or color difference. The entire glass panel delivers uniform light transmission, preserving the transparency and consistency of building facade design. 3. Compatible Curtain Wall Systems 1.Unitized Curtain Wall: Adaptable to factory prefabrication production, with adjustable curing speed to match assembly line rhythms. Finished products have high dimensional accuracy and are ready for on-site hoisting. 2.Framed Curtain Wall: Suitable for on-site pouring construction, with good thixotropy, no flowing during vertical pouring, and compatibility with aluminum profiles and sealing systems. 3.Double-Skin Ventilated Facade: Can be used as an intermediate fire separation layer, lightweight and transparent, without affecting ventilation and daylighting, and blocking vertical fire spread. 4. Typical Application Projects Exterior fire-resistant glass curtain wall systems for all types of public buildings, including super high-rise office buildings, large commercial complexes, airports, high-speed railway stations and cultural venues. Address: Huaiyin District, Jinan City, Shandong Province, China