Halogen-containing synergistic effect, antimony compounds

The synergistic action between antimony oxide and most types of halogenated FRs has been used with plastics for many years, and there are many highly efficient antimony/halogen systems in use. The combination is particularly effective, in controlled amounts, in plasticized PVC compounds. In other polymers that do not contain a halogen, a suitably chlorinated or brominated compound needs to be added to achieve the required properties. A special grade should be used if translucency is required. 

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