Chase Electronic Coatings HumiSeal® 1B51 Rubber Conformal Coating

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Chase Electronic Coatings HumiSeal® 1B51 Rubber Conformal Coating
Categories:	Polymer; Thermoset; Rubber or Thermoset Elastomer (TSE)
Material Notes:	HumiSeal® 1B51 is a fast drying, single component, synthetic rubber conformal coating that provides excellent moisture and environmental protection for printed circuit assemblies. Because of its unique base polymer, HumiSeal® 1B51 has extremely low moisture vapor permeability. The coating demonstrates excellent flexibility, low stress on components and is easily repaired. HumiSeal® 1B51 is in full compliance with the RoHS Directive 2002/95/EC. Information provided by Chase Electronic Coatings.
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Physical Properties	Metric	English	Comments

Density	0.890 g/cc	0.0322 lb/in³	ASTM D1475
Solids Content	22 %	22 %	By weight, ± 1.5%; Fed-Std-141, Meth. 4044
Volatile Organic Compounds (VOC) Content	694 g/l	694 g/l
Viscosity	155 - 215 cP	155 - 215 cP	Fed-Std-141, Meth. 4287. Part A
Thickness	25.0 - 75.0 microns	0.984 - 2.95 mil	Recommended coating

Mechanical Properties	Metric	English	Comments
Modulus of Elasticity	0.0353 GPa @Temperature 20.0 °C	5.12 ksi @Temperature 68.0 °F	DMA
	0.0735 GPa @Temperature 0.000 °C	10.7 ksi @Temperature 32.0 °F	DMA
	0.0931 GPa @Temperature -20.0 °C	13.5 ksi @Temperature -4.00 °F	DMA

Electrical Properties	Metric	English	Comments
Insulation Resistance	1.00e+10 ohm	1.00e+10 ohm	Moisture; MIL-I-46058C
	2.00e+14 ohm	2.00e+14 ohm	MIL-I-46058C
Dielectric Constant	2.5 @Frequency 1e+6 Hz, Temperature 25.0 °C	2.5 @Frequency 1e+6 Hz, Temperature 77.0 °F	ASTM D150-98
Dielectric Breakdown	4900 V	4900 V	ASTM D149
Dissipation Factor	0.070 @Frequency 1e+6 Hz, Temperature 25.0 °C	0.070 @Frequency 1e+6 Hz, Temperature 77.0 °F	ASTM D150-98

Thermal Properties	Metric	English	Comments
CTE, linear	55.0 µm/m-°C	30.6 µin/in-°F	TMA
Glass Transition Temp, Tg	14.0 °C	57.2 °F	DSC

Processing Properties	Metric	English	Comments
Cure Time	30.0 min @Temperature 76.0 °C	0.500 hour @Temperature 169 °F	Option
	1440 min @Temperature 23.0 °C	24.0 hour @Temperature 73.4 °F
	10100 min @Temperature 23.0 °C	168 hour @Temperature 73.4 °F	Optimum Properties
Tack-Free Time	10.2 min	0.170 hour	Fed-Std-141, Meth. 4061
Shelf Life	18.0 Month @Temperature 23.0 °C	18.0 Month @Temperature 73.4 °F	DOM

Descriptive Properties
Dielectric Withstand	>1500 V		per MIL_I_46058C
Fungus Resistance	Passes		ASTM G21
Moisture Vapor Transmission	<1 g/m2•day•mil		ASTM E398-03
Thermal Shock	-65 to 125°C		per MIL_I_46058C, 50 cycles

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 view all the property values for this datasheet as they were originally entered into MatWeb.

PCHAS928 / 239789

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