Sympoxy™ 1960/1961G

One Component, Low Heat Cure, Low Density, Flame Retardant (To UL 94-VO) Epoxy For Potting /Casting/Encapsulation Applications

Sympoxy™ is a lightweight powder that is both versatile and extremely easy to use. Items being potted are filled to the desired level, preferrably while vibrated to minimalize voids, and then cured with heat when ready. If the cured powder is to be an exterior surface, it may be coated with a liquid, flame retardant system to improve compressive strength. The chemical and moisture resistance of these powders are excellent, and are preferred over many liquid systems.

Typical Properties

Viscosity	Fine Powder
Shelf Life @ 21˚C @0˚C	3 mos. 6 mos.
Recommended Cure: @85˚C @95˚C @125˚C @150˚C	2-4 hrs. 2-4 hrs. 2 hrs. 1 hr.
Weight Loss (168 hrs @ 150˚C)	0.10
Flammibility Rating	UL 94 V-0
Specific Gravity	.26 to .30 / .30 to .34
Color	Grey
Dielectric Strength (Volt/mil)	480
Dielectric Constant (1MHz)	3.0
Dissipation Factor (1MHz)	0.02
Compressive Strength (psi)	500/1200
Volume Resistivity 50V @ 25˚C (ohm-cm)	4.0 x 10¹⁰/8.3 x 10¹⁰
Thermal Conductivity (BTU/hr/sq ft/˚F/in)	1.6
Moisture Resistance (168 hrs @ 25˚C)	0.03
Thermal Shock Resistance (after post cure of 1 hr. @ 150˚C - 55˚C to 150˚C)	Pass

MATERIAL HANDLING, PROCESSING, & SAFETY NOTES

PROCESSING / STORAGE:
If stored below 21°C, bring to room temperature (DO NOT USE HEAT) before using or extend curing time or temperature. Take bag from container and tumble in hands to insure good blend, make sure color is constant. Pour powder into unit to be potted and tap or shake to assure penetration of tight componentry.

CURING PROCEDURE:
Sympoxy 1960G/1961G may be cured at 85-90°C for 4 to 16 hours, depending on mass being cured. If operating temperature or thermal shock requirements are higher than 90°C then post cure 1 hour @ 150-160°C. Curing at the lower temperatures keeps shrinkage to a minimum.

SURFACE PREPARATION TO PREVENT ADHESION:
To prevent adhesion to the mold, use a GREASE-IT release agent. The following are recommended; GREASE IT II, GREASE IT IV, GREASE IT V, GREASE IT FDG, GREASE IT WAX P, or GREASE IT WAX LT. For best results, apply in a few thin coats, drying between coats. Porous surfaces, i.e. wood, plaster, etc, must be sealed thoroughly before release is applied. Use multiple coats of a good coating, such as: a high grade lacquer or urethane lacquer.

SURFACE PREPARATION FOR ADHESION:
For applications where adhesion is desired, the surface must be cleaned, abraded and dried. Sandblasting and mechanical roughing are the preferred ways of abrading surfaces to be bonded. For added adhesion to metals, use Primer 200, and for adhesion to plastic, use Primer 810. Make sure all surfaces are clean, dry and free from moisture.

CLEAN UP:
Cured polymers are difficult to remove. It is best to clean tools and equipment immediately after use.

PRECAUTIONS:
Skin or eye contact with any fine powder should be avoided. The use of gloves, eye protection, and face masks are strongly recommended. All powders, as a general practice, should be used in well-ventilated areas. Spot ventilation is most effective. Contaminated clothing should be removed immediately and the skin washed with soap and water or waterless skin cleaner. Should accidental eye contact occur, wash thoroughly with water and consult a physician.

Any finely-divided powder can become potentially explosive if it is dispersed in air. Do not expose this material to sparks, flames, or temperatures higher then those recommended for proper application.