A side benefit to using CPE is that it apparently behaves as a drip suppressant. The overall results show that antimony pentoxide FR formulations can be successfully modified with CPE not only to increase the Izod impact, but also to achieve a UL94 V-O rating for a 1.6 mm test specimen. No significant differences in tensile properties were noticed for the APO and ATO blends. Once again, all the samples based on antimony pentoxide were translucent as compared to the opaque trioxide sample. The translucency once again was not diminished for the antimony pentoxide compounds as compared to the opaque antimony trioxide formulation.
Antimony trioxide is shown for comparison purposes.
Slide 1 shows that the translucency is maintained for all three halogen systems formulated with antimony pentoxide as opposed to the opaque antimony trioxide disc. The halogen was TBBA for the Midnight Blue samples. As seen with the other colors, the pentoxide-based formulations are richer and glossier than the trioxide sample. These test samples show that by using BurnEx ADP494 Colloidal Antimony Pentoxide as a synergist in FR-ABS, deep attractive colors can be obtained at low color concentrate loadings. This translates into significant cost and performance advantages when compared to antimony trioxide FR-ABS formulations.