CHO-SHIELD 2002 QT

2003


SKU: CX52042002 0000 Categories: ,

Description

CHO-SHIELD 2002 is a chromate free, corrosion resistant conductive flange coating. This innovative material is well suited for composite substrates or for use in repairing CHO-SHIELD 2001

CHO-SHIELD 2002 Technical Datasheet

Value Proposition

Parker Chomerics’ CHO-SHIELD 2000 Series electrically conductive coatings provide a corrosion resistant conductive surface coating on aluminum or composite substrates. By reducing moisture penetration, CHO-SHIELD 2000 Series coatings offer corrosion protection for enclosure flanges which mate with particular EMI shielding gaskets. These tough, urethane coatings offer a highly conductive interface which improves overall EMI shielding performance. When used as a coating on a composite or other non-conductive surface, they provide the conductivity necessary to achieve excellent shielding effectiveness while maintaining their electrical and mechanical stability in hostile environments. CHO-SHIELD 2000-series coatings are three part, copper-filled urethane coating systems which have been formulated with special additives and stabilizers to maintain their electrical stability, even at elevated temperatures, which prevent aluminum surfaces from corroding in high humidity and/or marine environments.

Properties

Typical Properties Test Method CHO-SHIELD® 2001 CHO-SHIELD® 2002 CHO-SHIELD® 2003
Binder N/A Three Part Urethane
Fillers N/A Stabilized Copper Soluble Chromate Salts Stabilized Copper Stabilized Copper Soluble Chromate Salts
Color N/A Light Brown Light Brown Dark Brown
Cure Cycle N/A Cure cycle option 1: 2 hours at room temperature (70°F/21°C) followed by 0.5 hour at 250°F (121°C) Cure cycle option 2: 2 hours at room temperature (70°F/21°C) followed by 2 hours at 130°F (55°C) Cure cycle option 3: 7 days at room temperature (70°F/21°C)
Surface Resistance (max. @ recommended thickness of 0.003 inches (0.0762 mm) CEPS-00023 0.1 ohm/sq. (Cure 1) 0.1 ohm/sq. (Cure 2) 0.1 ohm/sq. (Cure 3) Aluminum 0.1 ohm/sq. (Cure 1) 0.1 ohm/sq. (Cure 2) 0.1 ohm/sq. (Cure 3) ------------------------- G-10 Composite 0.01 ohm/sq. (Cure 1) 0.1 ohm/sq. (Cure 2) 0.35 ohm/sq. (Cure 3) 0.1 ohm/sq. (Cure 1) 0.1 ohm/sq. (Cure 2) 0.3 ohm/sq. (Cure 3)
Pencil Hardness ASTM D3363 6H @ 250°F (Cure 1); 5H 130°F (Cure 2); 4H @ Room Temperature (Cure 3)
Adhesion ASTM D3359 5B
Surface Resistance after Salt Fog Exposure (max. @ recommended thickness of .003 inches (3 mils) (.076 mm) ASTM B117, CEPS-00023 0.5 ohm/sq. (No substrate degradation after 500 hrs.) Aluminum: 0.5 ohm/sq. (Minimal substrate degradation after 500 hrs.) ------------------------- G-10 Composite: 1.0 ohm/sq. (Minimal substrate degradation after 500 hrs.) (No substrate degradation after 500 hrs.)
Abrasion Resistance1 ASTM D4060 60mg 60mg 80mg
Shielding Effectiveness3 CHO-TP093 >80 dB4
JP8 Fluid Resistance2 (max. @ recommended thickness of 0.003 inches (3 mils) (.076 mm) CEPS-00023 0.5 ohm/sq. (Cure 1); 0.5 ohm/sq. (Cure 2); 0.5 ohm/sq. (Cure 3)
MIL-H-5606 Hydraulic Fluid Resistance (max. @ recommended thickness of 0.003 inches (3 mils) (.076 mm) 0.1 ohm/sq. (Cure 1); 0.1 ohm/sq. (Cure 2); 0.1 ohm/sq. (Cure 3)
Continuous Operating Temperature N/A -65°C to + 85°C ( -85°F to 185°F)
VOC N/A 543 g/L 540 g/L 541 g/L
Working Life N/A 2 hours
Tack Free Time ASTM D1650 1 hour
Theoretical Coverage N/A 0.035 - (ft2/g) (3 mils) 0.0033 - (m2/g) (3 mils) 211 - (ft2/gal) (3 mils)
Shelf Life (from date of manufacture) N/A 9 months
Mix Ratio (by weight) N/A 100 : 10.06 : 41.96 100 : 10.34 : 42.18 100 : 10.06 : 41.96
Mix Ratio (Touch-Up Version) (by weight) N/A 100 : 10.03 : 16.11 100 : 10.34 : 16.78 100 : 10.11 : 16.50
 

Features and Benefits

 
  • Urethane binder provides exceptional physical properties such as hardness and adhesion.
  • Excellent chemical resistance, including jet fuel (JP8), hydraulic fluids and motor oil.
  • High abrasion resistance even after jet fuel immersion.
  • Excellent coating hardness and scratch resistance.
  • Significantly more cost effective than silver-filled epoxies.
  • No degradation of shielding effectiveness after 500 hours of salt fog.
  • Pre-measured kits allow easy mixing of components in one containe