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Thermal Protection Systems > FlexFram
FlexFram™ Flexible Ablative Coatings
FlexFram 605 is a two-component, flexible, self-adhering, self-curing,
ablative coating. FlexFram 605 is available only in a light gray color.
FlexFram 605 was originally developed for thermal protection of missile
launching systems from rocket engine blasts; however, because of its toughness, erosion resistance,
ablative efficiency and adhesion, FlexFram 605 should be considered for applications
requiring short-term substrate protection from intense thermal and erosive environments.
FlexFram 605 NS is available for non-skid applications and FlexFram
605TH for vertical surface trowel applications. Both offer the same
ablative, adherence and curing properties as FlexFram 605.
FlexFram is manufactured and sold under U.S. Patent No. 4,656,095.
| Typical Properties of FlexFram™ 605 Cured Coating |
|---|
| Density, lbs/ft3(g/cm3) |
85.5 (1.37) |
| Hardness, Durometer, D Scale, 24 hrs. 80°F |
40 min. |
Bond Strength in Tension, psi (MPA)
to steel
to aluminum |
1,950 (13.4)
1,350 (9.3) |
Water Absorption at 75°F (24°C)
96 hrs. immersion, % |
0.08 |
| Peel Strength to Aluminum, lbs/inch |
4 |
Specific Heat, BTU/lb F (cal/g C)
70°F (21°C)
280°F (138°C) |
0.35 (0.19)
0.40 (0.22) |
Thermal Conductivity, BTU in/h ft2F (W/mk)
70°F (21°C)
280°F (138°C) |
3.0 (0.43)
0.40 (0.22) |
| Heat of Ablation, BTU/lb (cal/g) |
2,100 (1,166.6) |
Surface Flammability (ASTM-E-162)*
Flamespread Factor (FS)
Heat Evolution Factor (Q) |
5.47
16.41 |
|
* This numerical surface flammability rating is not intended to reflect hazards
presented by these or any other materials under actual fire conditions. |
| FlexFram™ 605 Mechanical Properties |
|---|
ASTM D-638
Tensile Strength psi
Tensile Modulus psi |
1,100
18,000 |
ASTM D-695
Compressive Strength psi
Compressive Modulus psi |
990
45,000 |
ASTM D-256
Izod Impact Strength |
1.7 ft-lbs
in |
ASTM 903
Adhesion (Peel Strength)
Cold
Rolled Steel
Ambient
-29 to 49° C 10 to 100% RH
Aluminum
Ambient
-29 to 49° C 10 to 100% RH
30 day immersion
Cold
Rolled Steel
Fresh
Water
Salt
Water
Aluminum
Fresh
Water
Salt
Water |
10.7/pli
10.7/pli
5.5/pli
5.5/pli
10.4/pli
9.3/pli
6.3/pli
6.05/pli
|
| FlexFram™ 605 Physical Properties |
|---|
ASTM D-257
Electrical Resistivity
Volume
Surface |
0.423 x 106ohm-cm
1.5 x 106 ohm-cm |
ASTM D-149 (Slow rate of Rise)
Dielectric Strength |
30 volts/mil |
ASTM E-228
-250°F
+250°F
N2 and Vacuum @ 10°C/min.
Thermal Gravimetric Analysis
Initial Weight Loss
20% Weight Loss
Max. Service Temp. (Cont.) |
-0.76%
+0.56%
257°F (125°C)
590°F (310°C)
150°C |
ASTM D-2863
Water Vapor Permeability |
0.06 perm-in. |
ASTM D-2863
Limiting Oxygen Index
Thermal Conductivity |
35.6%
2.63 BTU-in/hr
|
| FlexFram™ 605 Chemical Resistance |
|---|
Acids
30% Hydrochloric
30% Phosphoric
30% Sulfuric |
Negligible
Negligible
Negligible |
Bases
50% Sodium Hydroxide
50% Ammonium Hydroxide
Conc. Ammonium Hydroxide |
Negligible
Negligible
Negligible |
Solvents
Kerosene
Gasoline
ASTM #3 Oil
Methanol
MEK
Toluene |
Neglibible
Negligible
Negligible
Negligible
Slight
Poor |
|
