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Epocast_1628 A/B Ultra Low Density Syntactic Epoxy
Epocast 1628-A is a soft white paste to be blended with Epocast 1628-B, a soft yellowish paste to form an ultra low density epoxy syntactic system for edge reinforcing of honeycomb structures.

AEROSPACE APPLICATION
May be extruded from pneumatic equipment or spread with a putty knife or trowel to fill honeycomb core sections or edges of composite sandwich constructions. It can be easily sanded or machined after cure.

SPECFICATIONS
BMS 5-28, Type 28 Rev AD Hexcel RMS 651200 Rev 0 ROHR RITMS 5-28 TY 28 Rev A

TECHNICAL DATA
Property _____________________1539-A __1539-B __1539 A/B _______Test Method Color ________________________White____Yellow __Lt. Yellow _____Visual Density, g/cc. _______________0.45 ____0.52 ____0.48 ___________ASTM-D-1622 Viscosity, centipoise ________Paste ___Paste ___Paste_________ _ASTM-D-2196 Gel time, 60 gms at 77ºF, minutes -- __-- _______65_____________ASTM-D-2471 Shelf life at 77ºF, unopened, months 6 6 _______-- _____________FTM-204 MIX RATIO To 100 parts by weight of Epocast 1628-A, add 25 parts by weight of Epocast 1628-B. Mix both components thoroughly for several minutes to insure complete and uniform mixing. CURE SCHEDULE 48 hours at 77°F, or gel at room temperature plus 5 hours at 125°F. TYPICAL CURED PROPERTIES (Not for specification purposes) Test ________________________________________________Result __Test Method Compressive strength, Ksi at 77°F____________________2.80 ____ASTM-D-695 Compressive modulus, Ksi at 77°F_____________________230 _____-- Tensile lap shear, etched AL/AL, psi ________________800 _____ASTM-D-1002 Flammability, 60 second vertical; Extinguish Time ___0 sec.__ FAR 25.853 Burn Length _________________________________________3.0 inches Weight gain on immersion after 24 hours at 77°F, % ___________ASTM-D-543 Mil-S-3136, Type III test fluid _____________________1.5 _____-- Mil-M-5606, hydraulic fluid _________________________2.5 _____-- Skydrol 500-A _______________________________________3.5 _____-- Distilled water _____________________________________3.4 _____--


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