ESG-215 SERIES
PRODUCT BULLETIN
EPOXY PATCHING
PASTE
GRAPHITE FILLED
HIGH TEMPERATURE
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DESCRIPTION
ESG-215 GRAPHITE FILLED HIGH TEMPERATURE EPOXY PATCHING PASTE was developed to meet the requirement of the aircraft
and aerospace industry for use in repairing surface defects on composite molds and for making minor engineering changes. ESG-215 resin
is available with 2 hardener options: ESG-215 hardener is a lower viscosity hardener for filling minor surface defects; ESG-215-T is a thicker
hardener for filling large repairs requiring greater sag resistance.
TYPICAL HANDLING CHARACTERISTICS @ 77 F (25 C)
ESG-215 Hardener ESG-215-T Hardener
Mix Ratio (parts by weight) …………………………………………………….100R/14H ………………………………………………….100R/14.7H
Density (mixed) …………………………………………………………………….11 lbs/gallon ………………………………………………10.4 lbs/gallon
Mixed Specific Gravity …………………………………………………………..1.32 g/cc……………………………………………………1.25 g/cc
Resin Viscosity……………………………………………………………………..9,000,000cps……………………………………………..9,000,000cps
Hardener Viscosity………………………………………………………………..20cps………………………………………………………..100,000cps
Mixed Viscosity …………………………………………………………………….thixotropic paste …………………………………………thixotropic paste
Work Life ……………………………………………………………………………..35-50 minutes ……………………………………………35-50 minutes
Cure-To-Sanding-Time ………………………………………………………….2-4 hours …………………………………………………..2-4 hours
NOTE: See optional accelerated cure information on page 2.
Resin Color ………………………………………………………………………….Black…………………………………………………………Black
Hardener Color …………………………………………………………………….Amber……………………………………………………….Amber
Mixed Color ………………………………………………………………………….Black…………………………………………………………Black
Shelf Life ESG-215 Resin (in original unopened containers)…………………………………………………………………………1 year
Shelf Life ESG-215 and ESG-215-T Hardener (in original unopened containers)……………………………………………2 years
TYPICAL PHYSICAL PROPERTIES (Following oven cure at 350 F (177 C))
Ultimate Tensile Strength (ASTM D-638.91)…………………………….6,276psi (43MPa)……………………………………….7,101psi (49MPa)
Tensile Modulus (ASTM D-638.91) …………………………………………989,600psi (6,823MPa) ………………………………803,400psi (5,540MPa)
Tensile Elongation (ASTM D-638.91)………………………………………0.88% ……………………………………………………….0.91%
Ultimate Compressive Strength (ASTM D-695.91) ……………………14,420psi (99MPa)……………………………………..21,700psi (150MPa)
Compressive Modulus (ASTM D-695.91) ………………………………..250,800psi (1,729MPa) ………………………………241,600psi (1,666MPa)
Ultimate Flexural Strength (ASTM D-790.92) …………………………..11,500psi (79MPa)……………………………………..8,416psi (58MPa)
Flexural Modulus (ASTM D-790.92)………………………………………..667,400psi (4,602MPa) ………………………………428,400psi (2,954MPa)
Coefficient of Thermal Expansion (ppm/ F ( C))……………………….15.8 (28.5)…………………………………………………13.9 (25)
Heat Deflection Temperature @ 66 psi (ASTM D-648.82) …………268 F (131 C) ……………………………………………371 F (188 C)
Heat Deflection Temperature @ 264 psi (ASTM D-648.82) ……….249 F (121 C) ……………………………………………385 F (196 C)
Notched Izod Impact Strength (ASTM D-256.93A) ……………………4.01 in-lb/ft…………………………………………………n/a
Moisture Absorption (ASTM D-570.88) ……………………………………0.142% ……………………………………………………..n/a
Hardness……………………………………………………………………………..90 Shore D ………………………………………………..90 Shore D
Shrinkage …………………………………………………………………………….0.005 in/in………………………………………………….0.003 in/in
CONTINUED
Page 2 of 2
ESG-215
POST CURE SCHEDULE
8 hours @ 77 F (25 C)
+3 hours @ 350 F (177 C)
OPTIONAL ACCELERATED CURE
Product Technical Bulletin Cont.
ESG-215 can be cured to a sandable condition by directing a localized heat source, such as a heat gun, heat lamp or infrared heater at the
repaired area until material has hardened. A complete cure of ESG-215-T can then be achieved during the high temperature use of the
mold.
HEATING AND COOLING RATES DURING POST CURE
Always allow tools made with ADTECH High Temperature systems to gel at room temperature before subjecting them to post cure (24
hours is usually sufficient). This will prevent excessive exotherm and shrink stress from occurring.
When oven curing laminated molds, always place the mold in a room temperature oven. Increase oven temperature at a rate of no more
than 50 F (30 C) per hour. When heat cure is completed, turn off oven and allow molds to remain in the oven. Never remove mold from
oven until mold temperature has been lowered to less than100 F (38 C).
SPECIFICATIONS
Boeing MMS-101 and M41-03-01 Code HPAP
ESG-215 Series/Revised 12/18/19
Supersedes 1/12/15
The information contained in this technical data sheet results from research and tests conducted in our laboratories under precise conditions. Seller
cannot anticipate all conditions under which seller s products, or the products of other manufacturers in combination with seller s products, may be used.
It is the responsibility of the user to determine the suitability of the Axson Technologies products, under their own conditions, before commencing with
the proposed application. In no event shall Axson Technologies, Inc. be liable for any direct, indirect, punitive, incidental, special, and/or consequential
damages, to property or life, whatsoever arising out of or connected with the use or misuse of our products.
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