Questions about Thermoset Composites?

UV Stable Bulk Molding Compound

These materials are suitable for use in applications requiring superior colorfastness & physical property retention upon exposure to UV and visible light. They are designed with both UV stable colorants and UV additive to provide superior performance in an outdoor environment.

Please note: all of our materials are custom developed to meet your specific requirements, if you don't see a product performance metric that meets your needs, call us to discuss your specific project requirements at 317.773.1766 or email us at

UV Stable Bulk Molding Compound

B51 Series – Electrical Grade
Bulk Molding Compound (BMC)








Impact Strength-Izod Notched
Test Method: ASTM D-256

8.0 to 10.0

40 to 50 J/m

4.0 to 5.0

20 to 25 J/m

Flexural Strength
Test Method: ASTM D-790

19,000 to 22,000 psi

131 to 152 MPa

14,000 to 16,000 psi

97 to 110 MPa

Flexural Modulus
Test Method: ASTM D-790

2.0 106 psi

14 Gpa

2.0 106 psi

14 Gpa

Tensile Strength
Test Method: ASTM D-638

7,000 to 9,000 psi

48 to 62 MPa

6,000 psi

41 MPa

Compressive Strength
Test Method: ASTM D-695

23,000 psi

159 MPa

24,000 psi

166 MPa

Water Absorption (24 Hrs @ 23C)
Test Method: ASTM D-570



Barcol Hardness
Test Method: ASTM D-2583

30 to 50

40 to 50

Specific Gravity
Test Method: ASTM D-792

1.78 G/CM3

1.93 G/CM3

Test Method: ASTM D-955

0.001 to 0.003 in/in

0.1 to 0.3%

0.001 to 0.003 in/in

0.1 to 0.3%

Bulk Factor App.
Test Method: ASTM D-1895



Dielectric Strength
Test Method: ASTM D-149

290 kV/in

11 kV/mm

305 kV/in

12 kV/mm

Arc Resistance
Test Method: ASTM D-495

180+ Seconds

190 Seconds

Heat Deflection Temperature @ 264 psi
Test Method: ASTM D-648

>500 F

>260 C

>500 F

>260 C

Flame Resistance @ 1.5mm
Test Method: UL94



Flame Resistance @ 3.0mm
Test Method: UL94



Click to download a pdf of the B51 Series Data Sheet

The information on this sheet is a guide. The stated values reflect an average of several tests conducted on CI's goods. These values were obtained under ideal conditions and may not be replicated in any particular test, part, or application. Because the values achieved in actual parts depend considerably on part design, molding conditions, and testing methods, no guarantee is made or implied regarding values to be obtained in any specific test, part, or application. CI makes no warranty or representation as to the suitability of any of its goods for use in any application. CI relies on customer to conduct its own tests and judge for itself the suitability of CI's goods.