Songhan Plastic Technology Co.,Ltd.

Aptek 2503-A/B Low modulus urethane conformal coating

Category Polymer , Adhesive , Thermoset , Polyurethane, TS , Thermoset Polyurethane, Adhesive
Manufacturer Aptek Laboratories
Trade Name
Port Ningbo port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF Aptek 2503-A/B Low modulus urethane conformal coating.pdf
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Material Notes:
APTEK 2503-A/B is an unfilled, two component, electrically insulating, transparent, flexible urethane coating system designed for the encapsulation and protection of electronic services mounted on printed circuit boards. For coating applications that require toughness, this system provides a combination of excellent flexibility and optimum tensile strength/elongation characteristics Qualified to Mil-I-46058C and SCD 6528981; Non-TDI based for safety; Excellent reversion resistance for good physical stability under high heat and humidity environments; Tg below -70ºC for excellent low temperature cycling, storage and performance; Excellent substrate adhesion, no primer needed, superior to silicones; Exceeds NASA outgassing requirements for high vacuum environments; Fluoresces under black-light (UV) to facilitate QC inspection of coating coverage; Low viscosity and long work life for spraying or dipping operationsInformation provided by Aptek Laboratories, Inc.
Physical Properties Metric English Comments
Density 0.900 g/cc
0.0325 lb/in³
A Component; ASTM D1475
0.960 g/cc
0.0347 lb/in³
B Component; ASTM D1475
Viscosity 30 cP
30 cP
A Component; ASTM D1824
30 cP
30 cP
B Component; ASTM D1824
Outgassing - Total Mass Loss 0.84 %
0.84 %
Cured property; at 10E-6 torr; ASTM E595
Collected Volatile Condensable Material 0.030 %
0.030 %
Cured property; at 10E-6 torr; ASTM E595
Mechanical Properties Metric English Comments
Hardness, Shore A 88
Cured property; ASTM D2240
Tensile Strength, Ultimate 19.3 MPa
2800 psi
Cured property; ASTM D412
Elongation at Break 475 %
475 %
Cured property; ASTM D412
Thermal Properties Metric English Comments
CTE, linear 180 µm/m-°C

@Temperature 20.0 °C
100 µin/in-°F

@Temperature 68.0 °F
Cured property; ASTM E831-86
Glass Transition Temp, Tg -74.0 °C
-101 °F
Cured property; ASTM E831-86
Flash Point 7.00 °C
44.6 °F
A Component; ASTM D92
7.00 °C
44.6 °F
B Component; ASTM D92
Optical Properties Metric English Comments
Transmission, Visible 90 %
90 %
transparent; thickness not quantified
Electrical Properties Metric English Comments
Volume Resistivity >= 1.00e+15 ohm-cm
>= 1.00e+15 ohm-cm
Cured property; ASTM D257
Insulation Resistance 3.20e+12 ohm
3.20e+12 ohm
Cured property; MIL-I-46058C
Dielectric Constant 3.2

@Frequency 1000 Hz

@Frequency 1000 Hz
Cured property; ASTM D150
Dielectric Strength >= 59.1 kV/mm

@Thickness 0.0762 mm
>= 1500 kV/in

@Thickness 0.00300 in
Cured; ASTM D149
Dissipation Factor 0.025

@Frequency 1000 Hz

@Frequency 1000 Hz
Cured property; ASTM D150
Processing Properties Metric English Comments
Processing Temperature 85.0 °C
185 °F
Cure 6 hrs
100 °C
212 °F
Cure 3 hrs
120 °C
248 °F
Cure 1.5 hrs
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