Process for the preparation of flame-resistant halogenated imide compounds
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United States of America Patent
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Nov 2, 1999
Issued Date -
N/A
app pub date -
Mar 19, 1992
filing date -
May 18, 1987
priority date (Note) -
Expired
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Abstract
The invention relates to the preparation of halogenated imides derived from hydrazine, a halogen and a dicarboxylic acid anhydride and capable of being employed as fireproofing agents for plastics. A dicarboxylic acid anhydride is halogenated with bromine, chlorine or a mixture thereof and then the product thus obtained is subsequently reacted with hydrazine. No prior purification or isolation of the intermediate halogenated anhydride is required.
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