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Flame Retardant adhesives

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Sumitomo Bakelite Durez® 25378 Phenolic, Compression Grade
Categories: Polymer; Thermoset; Phenolic; Phenolic, Novolac, Heat Resistant Grade, Filled

Material Notes: Durez 25378 Black Phenolic is a two stage heat resistant/electrical grade molding material having an excellent molded finish, low shrinkage and good heat resistance. Durez 25378 has exceptional UL flammability ratings and good comparative tracking index.

Information provided by Sumitomo Bakelite North America, Inc.

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Physical PropertiesOriginal ValueComments
Density 1.61 g/ccASTM D792
Apparent Bulk Density 0.680 g/ccASTM D1895
Water Absorption 0.20 %ASTM D570
Linear Mold Shrinkage 0.0040 cm/cmASTM D955
 
Mechanical PropertiesOriginal ValueComments
Tensile Strength, Ultimate 45.0 MPaASTM D638
Tensile Modulus 10.3 GPaASTM D638
Flexural Strength 69.0 MPa
Compressive Strength 158 MPaASTM D695
 
Electrical PropertiesOriginal ValueComments
Electrical Resistivity 1.00e+12 ohm-cmASTM D257
Dielectric Constant 4.9
@Frequency 1e+6 Hz
ASTM D150
Dielectric Strength 12.8 kV/mmStep by step; ASTM D149
 16.7 kV/mmShort Time; ASTM D149
Dissipation Factor 0.040
@Frequency 1e+6 Hz
ASTM D150
Arc Resistance 180 secASTM D495
Comparative Tracking Index 220 VIEC Tracking Index
 
Thermal PropertiesOriginal ValueComments
Maximum Service Temperature, Air 160 °C
@Thickness 3.0 mm
UL Temperature Index
Deflection Temperature at 1.8 MPa (264 psi) 204 °CASTM D648
Flammability, UL94 V-0
@Thickness 0.510 mm
 V-0
@Thickness 1.50 mm
 5VA
@Thickness 3.30 mm

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P90X30a / 142668

Flame Retardant adhesives

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