Abstract
In order to find an effective halogen-free flame retardant for acrylonitrile-butadienestyrene copolymer (ABS), organo-phosphorus compounds were studied and their flame retarding performances were determined by UL 94 vertical test. It is found that the flame retardancy strongly depends on phosphorus (P) content of organophosphorus compounds. Only the mixture of ABS with 2-(6-oxido-6Hdibenz< c,e><1,2>oxaphosphorin-6-yl) methyl diethyl phosphinate (ODOPM-DE), which has the highest P content, i.e., 17.68 % gives V-0 rating for the 70/30 composition.
Highlights
Polymers are a large and growing fraction of the fire load in homes, commercial environment, and transportation
That the generation of toxic, corrosive, and halogenated gases in processing and the release of polybrominated dibenzo-p-dioxins (PBDDs), polybrominated dibenzofurans (PBDFs) in combustion might be avoided, there is a trend toward using non-halogen flame retardants in polymeric materials [4-5]
Triethylaminehydrochloride salt was filtered off and the filtrate was evaporated under reduced pressure to give the crude product.The yellowish solidof ODOPM-DE was obtained by washing the crude product with ethyl ether thoroughly
Summary
Polymers are a large and growing fraction of the fire load in homes, commercial environment, and transportation. The flammability of organic polymers limits their applications and fire hazard may be greatly increased when these materials are used unsuitably [1-3]. Halogenbased flame retardants, especially aromatic bromine compounds, are the most widely used in polymeric materials. That the generation of toxic, corrosive, and halogenated gases in processing and the release of polybrominated dibenzo-p-dioxins (PBDDs), polybrominated dibenzofurans (PBDFs) in combustion might be avoided, there is a trend toward using non-halogen flame retardants in polymeric materials [4-5]. EU forbids the use of polybrominated biphenyls (PBBs), polybrominated diphenylethers (PBDEs) in electric and electronic materials. Among the flame retardants containing nitrogen, silicone, phosphorus elements, organo-phosphorus compounds, generating less toxic gases and smoke, are the materials of choice [6-7].
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