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RAYPOXY YR-128 — Bisphenol-A Liquid Epoxy Resin

CAS No: 25068-38-6

RAYPOXY YR-128 is a general-purpose, high-purity liquid epoxy resin produced from the reaction of epichlorohydrin and bisphenol A.

It offers outstanding adhesion, excellent chemical and heat resistance, low shrinkage on cure, and high electrical resistivity — the preferred choice for protective coatings, civil engineering, flooring systems, and electrical encapsulation across the UAE, Saudi Arabia, and GCC.

Technical specifications

PARAMETERSPECIFICATION
CAS Number25068-38-6
EC Number500-033-5
AppearanceClear, Transparent Liquid
Epoxy Equivalent Weight (EEW)184 – 188 g/eq
Colour (Platinum Cobalt)≤ 15 Hazen
Inorganic Chlorine≤ 5 ppm
Hydrolysable Chlorine≤ 300 ppm
Volatile Matter≤ 0.15 %
Viscosity @ 25°C11,000 – 14,000 mPa·s
Specific Gravity @ 20°C1.16 g/cm³
Flash Point> 260°C
Boiling Point> 280°C

Applications

  • Primary resin for epoxy flooring, repair mortars, structural adhesives, and civil engineering applications in UAE and Saudi Arabia
  • Potting and encapsulation compound for electrical and electronic components with high insulation resistance
  • Base material for anticorrosion coatings, pipeline linings, and offshore protective systems (Arabian Gulf operations)
  • Protective coatings for industrial structures, warehouses, and manufacturing facilities across the GCC
  • Chemical intermediate for fibre-reinforced composites, casting resins, and industrial tooling
  • Adhesive binder for concrete repair, tile bedding, and grouting in construction applications
  • Marine coatings and hull protection systems operating in Gulf conditions

Key properties

  • Outstanding adhesion to steel, concrete, glass, and wood
  • Excellent chemical and solvent resistance when cured
  • Low shrinkage on cure — critical for precision applications
  • High electrical resistivity for electronics encapsulation
  • Compatible with all standard amine, polyamide, and anhydride hardeners
  • Standard unmodified bisphenol-A liquid epoxy resin grade (EEW 184–188 g/eq)
  • Flash point > 260°C (refer to the SDS for classification and storage requirements)
  • High heat resistance in cured systems

Usage and recommendations

Use with RAYCURE series hardeners for optimised cure systems. Typical addition rates depend on hardener AHEW and resin EEW (184–188 g/eq). For flooring applications in UAE summer conditions, use a phenalkamine hardener for humidity tolerance. For anti-corrosion primers, RAYCURE 915 or 925 polyamide hardeners are recommended. RAYCURE RD12 reactive diluent can be used to reduce viscosity for spray applications without affecting cure quality. RAYCURE K54 (DMP-30) can be used as accelerator at low levels.

Packaging

  • 240 kg Steel Drums
  • 1,000 kg IBC Tanks
  • Bulk Tankers (~20 MT)
  • Custom Packaging on Request

Storage and shelf life

Store in sealed original containers at 5–35°C, away from direct sunlight and heat sources. In UAE and Saudi Arabia summer conditions (45°C+), temperature-controlled storage is strongly recommended to prevent viscosity increase. Shelf life: 24 months in original sealed containers. Implement FIFO rotation.

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