Dialkoxyphosphonoalkyl derivatives of dihydrouracils
AssigneeCiba-Geigy Corporation
InventorsDaniel Porret, Jurgen Habermeier
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Abstract
The invention relates to 3-dialkoxyphosphonoalkyl-dihydrouracils. These compounds are manufactured by reacting dihydrouracils substituted in the 3-position by a halogenalkyl group with a trialkyl phosphite. The compounds are useful as flame retardants which may be incorporated into polymeric materials or their starting substances.
Claims6
A dialkoxyphosphonoalkyl derivative of the formula ##STR6## wherein Z is ethylene, or ethylene substituted by alkyl of 1 to 4 carbon atoms, R.sub.1 and R.sub.2 is alkyl of 1 to 4 carbon atoms, alkenyl of 3 to 4 carbon atoms, or wherein said alkyl or alkenyl is substituted by chloro, or R.sub.1 and R.sub.2 together form an alkylene of 2 to 5 carbon atoms, and A is alkylene of 1 to 12 carbon atoms, or --CH.sub.2 CH.sub.2 OCH.sub.2 CH.sub.2 --.
Dependencies are inferred from the claim text.