Parker Chomerics CHO-SHIELD® 4998 Conductive Flexible Coating

Login to see your most recently viewed materials here. Or if you don't have an account with us yet, then click here to register.

(Viewing data as-entered. Click here to return)

Parker Chomerics CHO-SHIELD® 4998 Conductive Flexible Coating
Categories:	Polymer; Adhesive
Material Notes:	Description: CHO-SHIELD® 4998 is a smooth, highly conductive flexible silver-filled polyurethane coating designed for military/aerospace airframe applications. Both coatings provide superior adhesion, excellent solvent rub and wear resistance, and are resistant against numerous operational and environmental fluids. CHO-SHIELD® 4498 can be applied to aluminum as well as non-conductive substrates and are designed to be used with primers and with external topcoat systems. CHO-SHIELD® 1091 can be used as a primer for ensuring improved performance on aluminum substrates. Information provided by Chomerics
Vendors:	No vendors are listed for this material. Please click here if you are a supplier and would like information on how to add your listing to this material.
Printer friendly version Download as PDF Download to Excel (requires Excel and Windows) Export data to your CAD/FEA program Add to Folder:

Physical Properties	Original Value	Comments

Specific Gravity	2.10 g/cc	Wet; ASTM D1475
Volatile Organic Compounds (VOC) Content	596 g/l	USEPA Method 24
Thickness	0.0760 - 0.102 microns	Recommended Dry Film

Mechanical Properties	Original Value	Comments
Impact Test	>= 75.0 ft-lb	Extrusion; ASTM D2794
	>= 75.0 ft-lb	Intrusion; ASTM D2794
Taber Abrasion, mg/1000 Cycles	160	ASTM D4060

Electrical Properties	Original Value	Comments
Surface Resistivity per Square	<= 0.075 ohm	CEPS-0002
	<= 0.075 ohm @Temperature 22.2 °C, Time 1.21e+6 sec	MIL-T-5624 JP-8; CEPS-0002
	<= 0.075 ohm @Temperature 71.1 °C, Time 605000 sec	MIL-H-5606 Hydraulic Fluid; CEPS-0002
	<= 0.075 ohm @Temperature 71.1 °C, Time 605000 sec	MIL-L-7808 Lubrication Oil; CEPS-0002
	<= 0.075 ohm @Temperature 85.0 °C, Time 1.21e+6 sec	CEPS-0002
	<= 0.075 ohm @Temperature -40.0 °C, Time 1.21e+6 sec	CEPS-0002
	<= 0.075 ohm @Temperature 85.0 °C, Time 2.59e+6 sec	CEPS-0002
Shielding Effectiveness	85 dB @Frequency 2.00e+8 - 1.00e+10 Hz	Modified Chomerics TP-08

Thermal Properties	Original Value	Comments
Maximum Service Temperature, Air	85.0 °C
Minimum Service Temperature, Air	-40.0 °C

Processing Properties	Original Value	Comments
Cure Time	2.00 hour @Temperature 54.0 °C	at Standard Conditions + 2 hrs
	24.0 hour @Temperature 15.5 - 21.0 °C	40-60% RH
Pot Life	60 min	ASTM D4212
Shelf Life	6.00 Month	From date of Manufacture

Descriptive Properties
Adhesion	5B	ASTM D3359
Color	Metallic Light Brown
Conical Bend	=>32.0%	Cracking: No Evidence; ASTM D522 - Test Method A
Coverage	250 sq ft/gal	at 3.0 mil Dry Film Thickness; Typical; ASTM D2697
Cross Hatch Adhesion	5B	85°C for 14 days; ASTM D3359
	5B	-40°C for 14 days; ASTM D3359
	5B	85°C, 85% RH for 30 days; ASTM D3359
Filler	Silver
Mandrel Bend	>500%	ASTM D522 -Test Method B
Mix Ratio	100:18.30:1.39:20.57	A:B:C:D
Resin	Polyurethane
Solvent Rub Resistance	Pass	CHO-TM 95-40-6013
	Pass	22.2°C for 14 days; MIL-T-JP-8; CHO-TM 95-40-6013
	Pass	71.1°C for 14 days; MIL-H-5606 Hydraulic Fluid; CHO-TM 95-40-6013
	Pass	71.1°C for 14 days; MIL-L-7808 Lubrication Oil; CHO-TM 95-40-6013
Visual Inspection	Pass	85°C for 14 days; CHO-TM 95-40-6013
	Pass	-40°C for 14 days; CHO-TM 95-40-6013
	Pass	85°C, 85% RH for 30 days; CHO-TM 95-40-6013
	Pass	22.2°C for 14 days; MIL-T-JP-8; CHO-TM 95-40-6013
	Pass	71.1°C for 14 days; MIL-H-5606 Hydraulic Fluid; CHO-TM 95-40-6013
	Pass	71.1°C for 14 days; MIL-L-7808 Lubrication Oil; CHO-TM 95-40-6013

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to go back to viewing the property data in MatWeb's normal format.

PCHOME233 / 130943

	Advertise with MatWeb!
	Data sheets for over 180,000 metals, plastics, ceramics, and composites.
	HOME • SEARCH • TOOLS • SUPPLIERS • FOLDERS • ABOUT US • FAQ • LOG IN

System Message