In silane coupling agent and metal surface treatment systems, the "ureido/mercapto synergistic functionality" and "trimethoxysilane hydrolysis activity" jointly dictate chemical bonding depth to non-ferrous metals, salt-spray life, and interfacial adhesion to polymer matrices. Conventional mono-mercapto silanes (e.g., KH-590/γ-MPS) inhibit copper rust but have short carbon chains, strong self-polymerization, limited silver/gold anti-oxidation and rubber reinforcement; pure amino/epoxy silanes weakly adsorb on precious metals and poor wet-heat resistance. As electronic Ag/Cu anti-oxidation, automotive rubber sealing high-wear, and cold-box foundry low-resin high-strength demand "ureido-mercapto dual function + trimethoxy fast hydrolysis + broad filler compatibility," sourcing a 3-ureidopropyltrimethoxysilane with density 1.150-1.160, nD 1.380-1.460, Pt-Co≤50 has become the core gap for domestic multi-functional silane localization.
Addressing this "ureido-mercapto dual anchor" pain point,
Anhui IOTA Silicone Oil Co., Ltd. (IOTA) officially launches
3-Ureidopropyltrimethoxysilane IOTA-1524 (Chemical Name: 3-ureidopropyltrimethoxysilane, CAS 23843-64-3, Formula C₇H₁₈N₂O₄). Characterized by "amber transparent viscous liquid, density 1.150-1.160g/cm³ (20℃), nD 1.380-1.460 (25℃), Pt-Co≤50, 4/5/25/200/1000kg PE/iron drums, 6-month shelf," and backed by "ureido coordination passivation + mercapto redox buffer + trimethoxy rapid grafting," it serves as the "interfacial anchor" for Au/Ag/Cu anti-rust, rubber reinforcement crosslinker, and cold-box foundry resin.
Molecular Architecture: Ureidopropyl Coordination + Mercapto Buffer + Trimethoxy Fast-Link Triple Logic
The core competitiveness of IOTA-1524 stems from its asymmetric bifunctional "one ureidopropyl (–NH–CO–NH–(CH₂)₃–), one trimethoxysilyl" structure:
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Ureido Coordination Passivation: Ureido (–NHCONH–) N/O atoms coordinate with empty d-orbitals on Au/Ag/Cu, building dense SAM that physically blocks moisture/Cl⁻; vs pure mercapto, ureido adds H-bond network and multi-layer shielding, lifting salt-spray life 2-3×.
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Mercapto Redox Buffer: Embedded –SH forms stable Cu–S/Ag–S covalent bonds, suppressing patina (Cu₂(OH)₂CO₃) and Ag₂S blackening; as radical scavenger in rubber vulcanization, buffers oxidative degradation and lifts crosslink uniformity.
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Trimethoxy Fast Inorganic Link: –Si(OCH₃)₃ rapidly hydrolyzes to silanol in trace water/alcohol, condenses with glass fiber, fumed silica, mica surfaces forming Si–O–M covalent bonds; hydrolysis-condensation simultaneous, no high-temp bake needed, room-temp coupling complete.
Performance Leap: From "Mono-Mercapto Cu-Only" to "Ureido-Mercapto Dual Anchor"
Incorporating IOTA-1524 enables qualitative leaps:
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Metal Anti-Rust & Oxidation: 0.5-2% EtOH/water dip or spray on Au/Ag/Cu, air-dry gives hydrophobic film—Cu salt-spray (ASTM B117) >72h no red rust, Ag H₂S (50ppm) >48h no black, fits PCB gold fingers, Ag contact protection.
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Rubber Reinforce & Set Cut: 1-3% (on filler) in NR/SBR/EPDM/NBR lifts tensile 15-30%, wear +20%, compression set -30-40%, ideal for dynamic seals and tire sidewalls.
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Cold-Box Foundry Cost Cut: 0.5-1.5% in furan/phenolic cold-box raises sand tensile 25-40%, resin can drop 10-20%, gas evolution reduces, casting porosity defects fall.
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Adhesive Wet-Strength Upgrade: 1-2% in epoxy/PU gives wet-state shear retention from 50% to >80%, 24h boil no debond.
Application Penetration: From PCB Gold Finger to Cold-Box Sand
IOTA-1524 covers sectors triply sensitive to "interfacial bonding + corrosion resistance + reinforcement":
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Electronics Protection: PCB gold-finger anti-oxidation, Ag contact anti-sulfidation, Cu busbar coating primer.
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Rubber Industry: Tires, seals, hoses, anti-vibration parts high-performance mod.
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Composites: Epoxy/UP/phenolic GRP, SMC/BMC products.
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Foundry & Coatings: Cold-box resin coupling, anti-corrosion paint adhesion promoter, ink wear mod.
IOTA Technical Guide: Alcohol-Water Hydrolysis, Light-Proof Seal
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Metal Surface Treat: 0.5-2% IOTA-1524 in 95% EtOH/DI (9:1 v/v), acetic acid to pH 4-5 to promote hydrolysis, dip/spray then air 10-20min or 80℃×10min bake for full SAM.
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Rubber/Plastic Blend: Spray directly on filler (silica, talc), mix 5-10min, or dissolve in acetone/EtOH then add to compound—ensure uniform dispersion.
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Cold-Box Use: Pre-blend with resin before catalyst to avoid strong-acid pre-gel; 0.5-1.5% of total resin weight.
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Taboo Red Line: No long contact with strong acid/base, heavy metal ions (catalyze self-poly or oxidize –SH to disulfide); hydrolyzed solution best used within 4-8h half-life, gel if aged; wear impermeable gloves, avoid skin contact with mercaptan.
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Storage: 4/5/25/200/1000kg PE or iron drums; sealed cool dry ventilated, moisture/water/sun/heat/source-proof; 6 months shelf, re-inspect OK to extend; mercapto odor, warehouse explosion-proof ventilated.
Industry experts note that under trends of long-life electronic components, green-tire low-rolling-resistance, and precision casting low-carbonization, ureido-mercapto bifunctional silanes are upgrading from "niche specialty coupler" to "cross-industry interfacial engineering core monomer." IOTA-1524, with its "ureidopropyl + ureido + trimethoxy" hard metrics,
fills the domestic supply chain gap for 3-ureidopropyltrimethoxysilane in metal anti-rust and rubber reinforcement, providing a mass-producible path to replace imported Momentive A-1524, Shin-Etsu KBM-602 for downstream enterprises. This confirms domestic silane couplers are advancing steadily along "dual-function synergy → metal coordination precision → rubber reinforcement efficiency," with growing technical say in interfacial engineering key materials.
