In metal surface treatment, polymer composite filling, foundry resin, and synthetic resin modification, how to form a strong, durable chemical bond between metal and polymer while imparting excellent corrosion and oxidation resistance to the metal surface is an eternal proposition of material interface science. Traditional silane coupling agents (e.g., aminosilanes, epoxysilanes) improve inorganic-organic interface adhesion but often fall short in anti-rust pre-treatment for precious metals like gold, silver, and copper. Ordinary surface treatments struggle to balance "metal chelation + siloxane bonding + polymer compatibility". With electronic packaging, precision casting, and high-end rubber composites demanding "metal-polymer interface strength, metal corrosion resistance, filler dispersion", finding a "ureido-functionalized trimethoxysilane, multi-system universal, easy to use" coupling agent has become a key formulation issue. Addressing this, Anhui IOTA Silicone Oil Co., Ltd. officially launches 3-Ureidopropyltrimethoxysilane IOTA-1524. Characterized by "CAS 23843-64-3; formula C7H18N2O4Si; amber transparent viscous liquid; color Pt-Co ≤50; density (20℃) 1.150–1.160 g/cm³; refractive index (nD 25℃) 1.380–1.460", backed by "ureidopropyl chelation + trimethoxy hydrolysis + metal anti-rust + polymer coupling", it serves as the "riveting choice" for metal anti-corrosion and composite coupling, achieving the leap from "single-function surface treatment" to "ureidosilane bidirectional coupling anti-corrosion". System Positioning: Ureidosilane Coupling Agent vs. Aminosilane/Epoxysilane IOTA-1524 belongs to the ureido-functionalized alkoxysilane family, distinct from traditional aminosilanes (e.g., KH-550) and epoxysilanes (e.g., KH-560). Aminosilanes are strongly basic and prone to protonation in acidic environments, reducing coupling efficiency. Epoxysilanes have good resin compatibility but limited metal chelation. IOTA-1524's ureidopropyl group has weakly basic nitrogen atoms and carbonyl oxygen, forming stable chelate/coordination films with gold, silver, copper surfaces via multidentate bonds, while the trimethoxysilane end hydrolyzes to condense with inorganics, forming a "metal←→silane←→polymer" bidirectional riveting structure. Molecular Architecture: C7H18N2O4Si + Ureidopropyl + Trimethoxy + Amber Viscous The core design of IOTA-1524 comes from 3-ureidopropyltrimethoxysilane structure:

• Ureidopropyl Functional Group: -NH-CO-NH-CH2CH2CH2- provides two nitrogen atoms and one carbonyl oxygen, enabling multidentate coordination/hydrogen-bond adsorption on metal surfaces to build a dense hydrophobic protective film against water and oxygen. The ureido group also has good compatibility with polymer resins (epoxy, phenolic, polyurethane, etc.).
• Trimethoxy Active End: Three -OCH3 groups hydrolyze in the presence of trace water to form Si-OH (silanol), which then condenses with -OH on metal oxides, glass fiber, and inorganic filler surfaces to form Si-O-M covalent bonds, realizing chemical bridging between inorganic and organic phases.
• Clear Physicochemical Baseline: Amber transparent viscous liquid facilitates purity and batch consistency inspection; density 1.150–1.160 g/cm³ and refractive index 1.380–1.460 provide quantitative basis for dosing and process monitoring.

Performance Leap: From "Weak Interface Adhesion" to "Bidirectional Riveted Anti-Corrosion" Introducing IOTA-1524 brings the following improvements across fields:

• Metal Anti-Rust: Treating gold, silver, copper surfaces improves corrosion and oxidation resistance, forming an organic-inorganic hybrid protective film.
• Polymer Adhesion: Enhances bonding strength between metal and polymers, suitable for thermosetting (epoxy, phenolic, nitrile) and thermoplastic (PVC, PS, polysulfone) materials.
• Rubber Reinforcement: In NR, EPDM/SBR, polysulfide, SBR, NBR, CR, PU rubbers, improves mechanical properties and wear resistance, reduces permanent set; suitable for surface modification of glass fiber, silica, quartz, talc, mica, fly ash, clay, pottery clay and other silicate fillers.
• Foundry Resin: Increases cold-box foundry resin bonding strength and sand mold strength, reducing resin dosage and gas evolution, improving casting quality.
• Synthetic Resin Modification: Added to synthetic resins to improve moisture and temperature resistance.
• Multi-Spec Packaging: 4kg, 5kg, 25kg, 200kg, 1000kg for lab to mass production.

Application Penetration: From Metal Pretreatment to Precision Casting IOTA-1524 covers multi-industry interface modification scenarios:

• Metal Surface Treatment: Anti-rust pre-treatment for Au/Ag/Cu, electronic component lead protection.
• Rubber Industry: Reinforcement and filler coupling for NR/EPDM/SBR/NBR/CR/PU.
• Composites: Glass fiber/silica-reinforced epoxy, phenolic, polysulfone thermoset/thermoplastic composites.
• Foundry: Cold-box resin sand strength improvement, reducing scrap rate.
• Coatings/Inks/Adhesives: As reinforcing agent and crosslinking promoter for bond strength and water resistance.

IOTA Technical Guide: Moisture-Proof Hydrolysis, Graded Dosing

• Application: Use directly or pre-hydrolyze with alcohol/water mixture. For metal treatment, prepare 0.5–2% aqueous or alcoholic solution, dip/spray and dry. For composite filling, add 0.1–1.5% by filler weight into resin. Fix ratio by substrate and application.
• Hydrolysis: Trimethoxysilane hydrolyzes with water. Pre-hydrolyze with pH 3.5–4.5 acetic acid/water solution to silanol, age before use for best effect.
• ⚠️ Taboo: Seal and store in cool, dry, ventilated place; moisture-proof and waterproof (silane self-polymerizes on water contact). Keep away from fire, heat, light (avoid photodecomposition). Reseal after use to prevent moisture. Store separately from acids, alkalis, oxidants. Avoid skin contact; wear protective gloves.
• Storage: Seal store in cool, dry, ventilated place, moisture/water-proof, away from fire/heat/light; shelf life 6 months. Packaging: plastic or iron drum, 4kg, 5kg, 25kg, 200kg, 1000kg or custom. Unlike IOTA 5804/522 (Class 8 corrosive, 2-year retest), IOTA-1524 is general chemical with 6-month shelf life.

Industry Insight: The core value of ureidosilane coupling agent lies in "ureido for metal chelation and resin compatibility, trimethoxy for inorganic covalent bonding, dual anchor for bidirectional riveting strength". IOTA-1524, with "C7H18N2O4Si, CAS 23843-64-3, amber viscous, density 1.150–1.160, RI 1.380–1.460, metal anti-rust + rubber reinforcement + foundry resin + synthetic modification" hard parameters, fills the bidirectional riveting link of domestic ureidosilane in metal anti-corrosion pretreatment, rubber filler coupling, and cold-box foundry. For material manufacturers, it upgrades metal-polymer interface strength and anti-corrosion premium along the path of "aminosilane → epoxysilane → ureidosilane".