Oxyethylene bismaleimide derivatives
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United States of America Patent
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Oct 24, 1989
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N/A
app pub date -
Nov 25, 1987
filing date -
Nov 25, 1987
priority date (Note) -
Expired
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Abstract
Novel bismaleimides of the formula ##STR1## wherein n=1, 2, or 3 are formed in two steps by reacting a diamine and maleic anhydride to form a bismaleamic acid which is reacted with acetic anhydride in the presence of acetone to form the bismaleimide. The bismaleimide monomer and prepolymers and the polybismaleimides formed from them may have improved flexibility, processibility, toughness and solubility.
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