Bisimide compositions
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United States of America Patent
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Jul 18, 1995
Issued Date -
N/A
app pub date -
Sep 26, 1994
filing date -
Oct 4, 1993
priority date (Note) -
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Abstract
A mixed bisimide having the formula: ##STR1## wherein D, A and Z are as defined in the specification, produced by reacting a diamine with an ethylenically unsaturated dicarboxylic acid anhydride and a halogenated compound containing an anhydride group and aromatic or bicyclo groups to form a bisamic acid composition and then dehydrating such composition to ring close the end groups. The halogenated end groups (Z) of the mixed bisimide component render the bisimide reaction product of the ring closing reaction flame retardant.
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