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- 产品描述
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USi-2H21 — β-(3,4-Epoxycyclohexyl)ethyltrimethoxysilane
High-Performance Epoxy-Functional Silane Coupling Agent
CAS No.: 3388-04-3
EINECS No.: 222-217-1
Molecular Weight: 246.38
Synonyms: Trimethoxy[2-(7-oxabicyclo[4.1.0]hept-3-yl)ethyl]silane
📄 Product Description
USi-2H21 is an epoxy-functional silane coupling agent that bridges organic polymers and inorganic substrates through dual-reactive functionality:
- Epoxy group → reacts with resins (epoxy, PU, acrylic, etc.)
- Trimethoxysilane group → hydrolyzes and bonds to glass, metal, minerals, and fillers
✅ Enhances adhesion, moisture resistance, mechanical strength, and long-term durability
✅ Ideal for high-reliability applications in electronics, composites, coatings, and sealants(High-resolution chemical structure available upon request – features cycloaliphatic epoxy ring linked to hydrolyzable trimethoxysilane)
📊 Typical Technical Data
⚠️ Values are typical and for reference only. Not to be used for specification without prior written confirmation from our technical team.
Parameter Specification Appearance Colorless transparent liquid Specific Gravity (20°C) 1.060 – 1.070 g/cm³ Refractive Index (nD20) 1.4400 – 1.4560 Purity (GC, %) ≥ 98.0%
🌐 Key Applications
🔌 Electronics & Encapsulation
- Improves moisture resistance and long-term reliability of electronic potting compounds, underfills, and encapsulants
- Prevents delamination at chip/substrate interfaces under thermal cycling or humidity stress
🧪 Adhesives & Sealants
- Boosts adhesion of epoxy, polyurethane, silicone, acrylic, and polysulfide sealants to glass, aluminum, steel, and ceramics
- Critical for automotive, construction, and aerospace bonding systems
🎨 Coatings & Inks
- Acts as a surface modifier and adhesion promoter in epoxy, polyester, and acrylic coatings
- Enhances corrosion protection on metal substrates and improves pigment/filler dispersion
🧱 Composite & Engineering Plastics
- Used in glass fiber sizing, mineral-filled PBT, nylon, and polyesters
- Increases interfacial strength between fillers (e.g., silica, talc) and polymer matrix
🏗️ Foundry & Abrasives
- Improves resin-filler bonding in casting resins and grinding wheels for higher structural integrity
📦 Packaging
- 25 kg plastic pail
- 200 kg steel or HDPE drum
- 970 kg IBC tote
(All containers are sealed, labeled, and moisture-controlled to prevent premature hydrolysis)
🛡️ Safety & Storage
- Flammable liquid – keep away from heat, sparks, and open flame
- Store in original, tightly closed containers at ambient temperature (≤ 35°C recommended)
- Shelf Life: 12 months from production date in unopened packaging
- Always consult the latest Safety Data Sheet (SDS) before handling
→ Available at: www.usi-chemical.com or upon request - Use appropriate PPE: nitrile gloves, safety goggles, and adequate ventilation
📞 Contact Us
Nanjing Union Silicon Chemical Co., Ltd.
- Headquarters:
Room 2002, Overseas Chinese Plaza, No.1 Daqiao North Road, Nanjing 210031, Jiangsu, P.R. China - Factory Address:
Dongcheng Guanli District, Gaizhou 115200, Liaoning, P.R. China - Tel: +86-25-5889 5266 / 5889 5699
- Fax: +86-25-5830 5349
- Website: www.usi-chemical.com
- Email: service@usichemical.com
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