EPOCAST 50-A1/946

Harmonization Code : 3214.10.00 | Putty and other mastics | Resin cements, caulking compounds and other mastics

EPOCAST 50-A1/946

Main features

  • Short 20-Minute Gel Time
  • Solvent-Free Composite Laminating
  • High-Strength Cured Laminate

Product Description

EPOCAST 50-A1 Resin / Hardener 946 Epoxy Laminating System is an unfilled, solvent-free two-component epoxy for composite structure manufacture, repair, and filament winding. The amber system mixes at 100:15 by weight and has a 20-minute gel time at 25 deg C, providing the shorter work-life option in the 50-A1 series. It can be cured for five days at 25 deg C or heat-cured for two hours at 77 to 93 deg C after room-temperature gel. Typical cured glass-laminate data include compressive strength above 46 ksi and self-extinguishing behavior.

Key features

  • Short working window: The mixed system has a 20-minute gel time at 25 deg C.
  • Solvent-free laminating system: The unfilled epoxy is used for composite manufacture, repair, and filament winding.
  • Cured laminate strength: Typical compressive strength exceeds 46 ksi across the reported cure conditions.

Applications

  • Composite structure manufacture
  • Composite repair
  • Filament winding
Product Family

EPOCAST 50-A1/946

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TDS, SDS & Technical Documents

Technical Specifications

General Properties
Color
The color
White
Pot Life
Pot life is the amount of time it takes for the viscosity of a material to double (or quadruple for lower viscosity materials) in room temperature after a material is mixed. It is closely related to work life but it is not application dependent, less precise and more of a general indication of how fast a system is going to cure.
2-5 minutes
Physical Properties
Viscosity (Part A)
7,770 mPa.s
Viscosity (Part B)
400 mPa.s
Thermal Properties
Glass Transition Temperature (Tg)
The glass transition temperature for organic adhesives is a temperature region where the polymers change from glassy and brittle to soft and rubbery. Increasing the temperature further continues the softening process as the viscosity drops too. Temperatures between the glass transition temperature and below the decomposition point of the adhesive are the best region for bonding. The glass-transition temperature Tg of a material characterizes the range of temperatures over which this glass transition occurs.
70 °C

Additional Information

Technical properties

As-supplied / before-processing properties

Typical as-received values distinguish the resin, hardener, and mixed system.

Property Value Unit Method / condition
Color 50-A1 resin amber; 946 hardener straw; mixed system amber - Visual
Density 50-A1 1.21; 946 1.05; mixed 1.18 g/cm^3 ASTM D792
Viscosity 50-A1 7,770; 946 400; mixed 2,400 cP At 25 deg C; ASTM D2196
Mix ratio by weight 100:15 - 50-A1 resin:Hardener 946
Gel time 20 min 100 g mass at 25 deg C; ASTM D2471
Shelf life 12 months Components unopened at 25 deg C
Technical properties

After-processing / final-state properties

Typical cured laminate properties vary with the stated cure schedule.

Property Value Unit Method / condition
Cure schedule 5 days at 25 deg C; or 2 h at 77 to 93 deg C after room-temperature gel - Typical cure options
Handling and machining 8 to 16 h At room temperature
Compressive strength 46.03; 50.58; 48.30 ksi 7 days at 25 deg C; 27 days at 25 deg C; 1 day at 25 deg C plus 2 h at 66 deg C; ASTM D695
Compressive modulus 4.04; 3.43; 3.66 Msi Same cure sequence as compressive strength; ASTM D695
Self-extinguishing time 0 s 60-second vertical test; 7-day and heat-cured specimens
Burn length < 6 (< 15) in (cm) FAR 25.853A; 60-second vertical test

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