ITW Devcon® DFense Blok™ Wear-Resistant Epoxy Compound

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ITW Devcon® DFense Blok™ Wear-Resistant Epoxy Compound
Categories:	Polymer; Thermoset; Epoxy
Material Notes:	DFense Blok™ is a revolutionary wear and abrasion alumina ceramic bead-filled epoxy compound. DFense Blok™ is formulated to significantly outlast traditional wear and abrasion products while also providing superior performance in the most severe conditions. Use: Repair scrubbers, ash handling systems, pipe elbows, screens, chutes, chippers, bins, hoppers, bunkers, separators, digester tables. Protect exhausters, launderers, housing fans, crushers, breakers, and conveyor screws. Features: EZ-Mix Technology, Non-sag in Vertical and Overhead Applications, Outstanding wear and abrasion resistance, Able to withstand high impact forces, Resistance to a wide range of chemicals, Non-Sag Putty. Information provided by ITW Performance Polymers.
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Physical Properties	Original Value	Comments

Specific Gravity	2.21 g/cc	Cured
Solids Content	100 %	Uncured

Mechanical Properties	Original Value	Comments
Hardness, Shore D	77
Flexural Strength	7876 psi	ASTM D790
Compressive Strength	7145 psi	ASTM D695
Adhesive Bond Strength	2616 psi	Adhesive Tensile Shear; ASTM D1002

Electrical Properties	Original Value	Comments
Dielectric Constant	49	ASTM D150

Thermal Properties	Original Value	Comments
CTE, linear	29.0 µin/in-°F	ASTM D696
Maximum Service Temperature, Air	140 °F	Temperature Resistance - Wet
	300 °F	Temperature Resistance - Dry
Shrinkage	0.050 %	Linear During cure; ASTM D2566

Processing Properties	Original Value	Comments
Cure Time	4.50 hour @Temperature 21.0 °C	Functional cure
	16.0 hour @Temperature 24.0 °C
	168 hour @Temperature 24.0 °C	As Tested
Pot Life	25.0 min @Temperature 23.9 °C

Descriptive Properties
Chemical/Solvent Resistance	1,1,1-Trichloroethane: very good	30 day immersion at 75°F. Sample cured 7 days at RT
	Ammonia: excellent	30 day immersion at 75°F. Sample cured 7 days at RT
	Benzene: very good	30 day immersion at 75°F. Sample cured 7 days at RT
	Gasoline (Unleaded): fair	30 day immersion at 75°F. Sample cured 7 days at RT
	Hydrochloric Acid 10%: very good	30 day immersion at 75°F. Sample cured 7 days at RT
	Methanol: poor	30 day immersion at 75°F. Sample cured 7 days at RT
	Methyl Ethyl Ketone: poor	30 day immersion at 75°F. Sample cured 7 days at RT
	Methylene Chloride: poor	30 day immersion at 75°F. Sample cured 7 days at RT
	Nitric Acid 10%: fair	30 day immersion at 75°F. Sample cured 7 days at RT
	Phosphoric: fair	30 day immersion at 75°F. Sample cured 7 days at RT
	Potassium Hydroxide 40%: excellent	30 day immersion at 75°F. Sample cured 7 days at RT
	Sodium Hydroxide 10%: very good	30 day immersion at 75°F. Sample cured 7 days at RT
	Sulfuric Acid 10%: very good	30 day immersion at 75°F. Sample cured 7 days at RT
	Toluene: excellent	30 day immersion at 75°F. Sample cured 7 days at RT
	Trisodium Phosphate: very good	30 day immersion at 75°F. Sample cured 7 days at RT
Color	Gray	Cured
Coverage	47 sq. in/lb	Uncured at 1/4"
	50 sq in	@ 1/4 thick. Cured
Mix Ratio by volume	2:1
Mix Ratio by weight	100:45
Recoat Time	2 to 3 hrs
Specific Volume (in.³/lb)	12.5	Cured
Viscosity	Non-sag putty Mixed

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PITWD9172 / 239682

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