| prov:value
| - The compounds of formula I are useful as flame retardants for organic combustible materials, for example polyolefins, in particular polypropylene and polyethylene. polyesters, polymethyl methacrylates, polyphenylene oxides, polyurethanes, polyamides such as nylon, polystyrene, polypropylene oxide, ethyl cellulose, cellulose propionate. polyacrylonitrile, and copolymers such as acrylonitrile-butadi
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