81XR28A-2_TDS.pdf

Method State
Weight Resin
Volume Hardener
Hardness
Compression Yield 10,430
Tensile Strength 8,040
Tensile Modulus 4.14E+05
Tensile Elongation
Flexural Strength 14,000
Flexural Modulus 4.27E+05
Tg DSC Onset 1st Heat 127(53)
124(51)
149(65)
2024 Gougeon Brothers, Inc.
Rev 6 / Mar 2024
Ultimate Tg by DSC ASTM E1356 F ( C)
1
Additional post cure may be required; contact Technical Department for details.
2
Store PRO-SET Epoxy resins and hardeners at room temperature in sealed containers until shortly before use. As with many high-performance
epoxy resins, repeated exposure to low temperatures during storage may cause the resin to crystallize. If this occurs, warm the resin to 125 F and stir
to dissolve crystals. Hardeners may form carbamation when exposed to CO
2 and moisture in the atmosphere for extended periods of time. Prevent
carbamation by protecting hardeners from exposure until immediately prior to processing.
Test specimens were neat
epoxy (without fiber
reinforcement).
Typical values, not to be
construed as specification.
ASTM E1356 F ( C)
Heat Deflection TemperatureASTM D648 F ( C)
ASTM D790 psi (MPa) (2944)
THERMAL PROPERTIES
Property Standard Units
RT Gelation
+ 140 F (60 C)
x 8 hrs
ASTM D638 % 3.9
ASTM D790 psi (MPa) (97)
ASTM D638 psi (MPa) (55)
ASTM D638 psi (MPa) (2854)
ASTM D2240 Type D 84
ASTM D695 psi (MPa) (72)
3.23:1 100:31.0 lb/gal (g/cc)8.10 (0.97)
MECHANICAL PROPERTIES
Property Standard Units
RT Gelation
+ 140 F (60 C)
x 8 hrs
DENSITY
Resin:HardenerResin:Hardener Units 72 F (22 C)
3.85:1 100:26.0 lb/gal (g/cc)9.51 (1.14)
Viscosity (resin) ASTM D2196 cP 480
Viscosity (hardener)ASTM D2196 cP 115
MIX RATIO
100g Pot Life ASTM D2471minutes 225-275
Viscosity Mixed ASTM D2196 cP 325
HANDLING PROPERTIES
Technical Data
Property Standard Units 72 F (22 C)
XR28A~M2046
FIRE RETARDANT
INFUSION EPOXY
COMBINED FEATURES
Very low v iscosity for rapi d saturation of
fiberglass, K evlar and carbon fiber
laminate with resin infusion and VARTM
processes.
Slow sp eed hardener provides about 4
hours of pot lif e at 72 F (22 C).
Fire retardant system contains hi gh
levels of phosphorous t o reduce flame
spread and smok e generation in a
composite laminate when compared to a
standard resin system.
This combinati on is formulated
specifically for r esin infusion and VARTM
processes. Do not use in open mold
applications.
Elevated temperatur e cure is required.
S he lf L i fe
Ye a r
3
Re s in
Ye a r
2
Har dene r
QC Tinting Availa
To view more PRO-SET products, give us a visit at
fiberglasssupply.com!