POLYCAST   266

General Purpose Epoxy Casting Compound

DESCRIPTION:

Polycast 266 is an easy to use epoxy casting/potting compound exhibiting excellent adhesion to metals, ceramics and most plastics.  When properly cured with Polycure 67, Polycast 266 will conform to the requirements of MIL-I-16923, Types B, C & D, and will not support fungus growth.

 

PROPERTIES - UNCURED:	Part A		Part B
Color, Visual	Black/White/Grey		Dk. Brown
Viscosity, cps.	80,000		400	ASTMD2393
Specific Gravity	1.59		1.0
Mix Ratio (By Weight)			100:14
Mixed Viscosity, cps.	25,000-60,000			ASTMD2393
Pot Life @ 72o F, hours			5
Shelf Life @ 72o F, months	12		12
PROPERTIES - CURED:
Hardness Durometer (Shore D)		89		ASTMD 2240
Tensile Strength, psi		10,500		ASTMD 638
Tensile Elongation, %		2-4		ASTMD 638
Compressive Strength, psi		24,000		ASTMD 695
Flexural Strength, psi		24,000		ASTMD 790
Coefficient of Thermal Expansion		40 x 10-6
Shrinkage on Cure		0.002
Service Temperature (°C)		-55 - 155
Dielectric Strength, volts/mil		440		ASTMD 149
Dielectric Constant, 60 Hz		4.8		ASTMD 150
Dissipation Factor, 60 Hz		0.01		ASTMD 150
Volume Resistivity, ohm-cm		5.0 x 1016
Thermal Conductivity, BTU's		4.7

                            

USE INSTRUCTIONS:

1.        Premix P.C. 266 in the original container prior to use to insure any settled filler may be reincorporated.

2.        Weigh out the required amount of P.C.266.

3.        Measure out the appropriate amount of material:

100 Parts (part A) : 14 parts (part B) by weight.

4.        Mix thoroughly, scraping both sides and bottom of container.

5.        Evacuate mixture at 29 in. Hg for 5- 10 minutes.

6.        Pour into mold or cavity.

CURE SCHEDULE:                                                                            

Room Temp. - 24 hrs.

2 hours at 100^o C

1 hour at 125^o

General Purpose PC-100: Low Cost General Purpose PC-125: Low viscosity potting and casting. PC-133: Flame retardant casting PC-135: Machinable. PC-159: Flame retardant UL94V-0 rated. PC-205: Low viscosity version of 159. PC-266: Version of 159 meeting MIL-1-6923. PC-290:Room Temp. Cure PC-510: Low Viscosity, Clear Casting

Thermally Conductive PC-100: Low Cost General Purpose PC-140: Castable Heat Sink, UL94v0. PC-240: Superior resistance. PC-280: Best balance of properties. PC-282: Twice the conductivity of PC-280 with lower viscosity. PC-287: Highest thermal conductivity. PC-571: One Component, Rigid PC-581: One Component, Flexible PC-582: Flexible Heat Cure PC-8300: Single Component, Casting Sand

Special Epoxies PC-ALUM: Aluminum filled PG-30: Room Temp Epoxygel PG-50: Flexible Epoxy gel PC-220: Electrically conductive PC-250: Soft, flexible epoxy PC-254: Low Viscosity Filled PC-270: Aluminum Filled PC-517: Adhesive Flexible PC-601: Very low viscosity PC-610: Optically clear PC-661: Lightweight PC-685: Superior thermal shock resistance PB-839: Equal Ratio Adhesive PC-8500: Single Component, Lightweight