In formulating solvent-free epoxy systems — whether for clear potting compounds, encapsulation resins, floor coatings, or structural adhesives — the base epoxy resin (DGEBA or DGEBA-derived hydrogenated variants) often exhibits viscosity in the 8,000–15,000 mPa·s range at 25°C, making it difficult to wet fillers, entrapping air, and slowing mixing/dispense cycles. Adding non-reactive solvents is not an option in 100 % solids formulations. The solution is a reactive diluent — a low-molecular-weight epoxide that participates in the cure reaction and becomes part of the polymer network. The Allyl glycidyl ether 680 — CAS 106-92-3 Epoxy Reactive Diluent EEW 114–126 Low Viscosity ≤ 15 mPa·s @ 25°C Total Chlorine ≤ 500 ppm for Epoxy Resin System UV Cationic Coating Adhesive Sealant (from Hubei Jinghong Chemical Co., Ltd., JHCHEM® Brand) is a mono-functional epoxide containing both an allyl (vinyl) group and an epoxy group; the epoxy ring opens during cure with amines/anhydrides while the allyl group remains mostly inert under ambient cure (though it can participate in radical or cationic UV cure if formulated accordingly). Added at 5–15 phr (parts per hundred resin), it typically reduces a 12,000 mPa·s DGEBA resin to 4,000–6,000 mPa·s — improving air-release and filler wetting — while the incorporated epoxy group ensures the diluent is chemically bound into the matrix rather than bleeding out or volatilising. But how does mono-functional dilution affect Tg and chemical resistance, what are the handling precautions for this allyl-epoxide, and in which formulations does AGE outperform bisphenol-A based liquid diluents? Here is the full breakdown for formulators, coating chemists, and EMS material buyers.
Why AGE (Allyl Glycidyl Ether) Is Preferred Over Some Aliphatic Epoxy Diluents
A Allyl glycidyl ether 680 — CAS 106-92-3 Epoxy Reactive Diluent EEW 114–126 Low Viscosity ≤ 15 mPa·s @ 25°C Total Chlorine ≤ 500 ppm for Epoxy Resin System UV Cationic Coating Adhesive Sealant (from Hubei Jinghong Chemical Co., Ltd., JHCHEM® Brand) offers three formulation advantages:
Very Low Viscosity (5–15 mPa·s @ 25°C): Among the lowest of common reactive diluents — more effective per phr at reducing mix viscosity than C12–C14 alkyl glycidyl ethers (which are typically 10–30 mPa·s).
Good Compatibility with DGEBA & Cycloaliphatic Epoxies: Miscible at use-levels up to 20–25 phr without clouding; does not plasticise the cured network as severely as long-chain aliphatic mono-epoxides if usage is kept ≤ 15 phr.
Dual-Functionality Potential in UV-Cationic Systems: The terminal allyl (vinyl) group can undergo radical or cationic polymerisation if the formulation includes a suitable photoinitiator + UV exposure — allowing AGE to act as hybrid reactive diluent / co-monomer in hybrid thermal-UV cure schemes (less common but valuable for certain inks/coats).
Key Specifications (From JHCHEM AGE 680 Datasheet)
Product Name: Allyl glycidyl ether 680 (also referenced as AGE or Allyl Glycidyl Ether)
CAS Number: 106-92-3
Chemical Formula: C₆H₁₀O₂ (allyl 2,3-epoxypropyl ether)
Appearance: Colorless to pale yellow transparent liquid
Epoxy Equivalent Weight (EEW): 114–126 g/eq (theoretical ~ 114; typical commercial 118–124)
Viscosity (@ 25°C): ≤ 15 mPa·s (typical 5–12 mPa·s — varies slightly by batch)
Epoxy Value: ≥ 8.50 eq/100 g
Total Chlorine Content: ≤ 500 ppm (hydrolyzable Cl typically ≤ 200 ppm)
Water Content (Karl Fischer): ≤ 0.10 %
Density (@ 20°C): ≈ 0.965–0.985 g/cm³
Boiling Point (at 101.3 kPa): ≈ 153–155°C (handle below 60°C to avoid vaporisation loss during mix)
Flash Point (PMCC): ≈ 48–52°C (classified as flammable liquid — observe storage/use precautions)
Shelf Life (Unopened, Store 5–25°C, Away from Light & Moisture): 12 months minimum
Packaging: 20 kg / 200 kg drums; IBC 1000 kg on request
Compliance (on request): RoHS, REACH registered, MSDS + COA per lot
Typical Formulation Roles
Viscosity Reducer in Solvent-Free Epoxy Coatings & Flooring: 5–12 phr in self-leveling epoxy floor toppings — improves flow/levelling, reduces entrapped air, aids roller/scratch-coat application.
Potting / Encapsulation Resin Thinner: Lowers viscosity for better penetration into tight clearances around components (LED lead frames, SMT PCB potting) — keep ≤ 10 phr to minimise Tg drop in heat-sensitive electronics.
Adhesive Formulation Aid: Added to structural epoxy pastes (steel-bond, carbon-fiber laminating resin) to improve wetting of substrates and workability; excessive mono-epoxide (> 15 phr) will reduce lap-shear strength — balance required.
UV-Cationic Hybrid Coating / Ink Co-Reactive Diluent: Allyl group can be activated by cationic UV photoinitiator — used in specialty graphic-arts inks or overprint varnishes where low-viscosity epoxy diluent is needed.
Intermediate for Organic Synthesis: Glycidyl-allyl ether functionality makes AGE a useful synthon for further epoxidation or thiol-ene click modification in specialty polymer synthesis (lab / pilot scale).
Impact of Mono-Functional Diluent on Cured Properties — What to Watch
Adding a mono-epoxide (like AGE) terminatesa growing polymer chain rather than extending it — therefore:
Glass Transition Temperature (Tg): Expect 2–5°C drop per 5 phr AGE in a standard DGEBA/amine system; quantify by DSC during formulation screening.
Crosslink Density & Chemical Resistance: Slight reduction in crosslink density can marginally slow solvent/acid resistance if over-diluted — test extracted weight-loss (24 h acetone Soxhlet) at target AGE level.
Mechanical Properties: Tensile / flexural modulus may soften slightly; impact resistance can improve (internal plasticisation) — again, keep within 5–15 phr for most structural adhesives/coatings.
Recommendation: Always run a small-scale screened formulation (3–5 AGE levels × 2 cure schedules) to lock in acceptable Tg & mechanical envelope before full-scale production.
Handling, Storage & Safety
Skin Sensitiser: Like all epoxy monomers, AGE is a potential skin sensitiser — wear nitrile gloves, goggles; wash exposed skin promptly with soap & water (do NOT use solvents on skin).
Ventilation: Use in well-ventilated area — vapour pressure low at RT but mist/vapour can form during heated mixing or spraying.
Store Cool & Dry: Keep drum bungs tight; avoid > 30°C long-term storage to prevent slow oxidative yellowing; reseal partially used containers promptly.
Spill Response: Absorb with inert material (sand, vermiculite), collect in labelled hazardous-waste container — do NOT flush to drain.
Shelf-Life Check: After 12 months request COA re-check (EEW, Cl⁻, water) before critical campaigns.
Sourcing Checklist for Formulators & Distributors
When requesting a quote for the Allyl glycidyl ether 680 — CAS 106-92-3 Epoxy Reactive Diluent EEW 114–126 Low Viscosity ≤ 15 mPa·s @ 25°C Total Chlorine ≤ 500 ppm for Epoxy Resin System UV Cationic Coating Adhesive Sealant (from Hubei Jinghong Chemical Co., Ltd., JHCHEM® Brand):
✅ Specify pack size — 20 kg pail / 200 kg drum / 1000 kg IBC.
✅ Request COA (Lot-Specific): EEW, total Cl, hydrolyzable Cl, viscosity, water content.
✅ Ask for MSDS / SDS + REACH / RoHS Declaration.
✅ Inquire about sample (500 g–1 kg) for lab trial before bulk commitment.
✅ Confirm lead time & MOQ — stock typically available for 20 kg/200 kg; IBC on allocation or short lead.
Conclusion: The Go-To Low-Viscosity Reactive Diluent for 100 % Solids Epoxy Systems
The Allyl glycidyl ether 680 — CAS 106-92-3 Epoxy Reactive Diluent EEW 114–126 Low Viscosity ≤ 15 mPa·s @ 25°C Total Chlorine ≤ 500 ppm for Epoxy Resin System UV Cationic Coating Adhesive Sealant (from Hubei Jinghong Chemical Co., Ltd., JHCHEM® Brand) is the standard-reference mono-functional epoxy reactive diluent for formulators needing to thin high-viscosity resins without introducing volatile solvents or non-reactive plasticisers. Its very low viscosity, good DGEBA compatibility, and bound-epoxide participation in the cure network make it indispensable in flooring, potting, adhesive, and hybrid UV-cationic coating formulations — provided usage is optimised (typically 5–15 phr) to balance processability against cured-property retention. For specialty-chemical distributors, captive adhesive R&D labs, and EMS material specifiers wanting a specification-grade, low-chlorine AGE, JHCHEM's AGE 680 is the correct material designation.
