Fluorine-containing bismaleamic acids and bismaleimides useful f

Details Fluorine-containing bismaleamic acids and bismaleimides useful f Fluorine-containing bismaleamic acids and bismaleimides useful f

1989-09-21

1992-02-18

Ivy, C. Warren

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548452, 548520, C87D207452

Patent

active

050896288

ABSTRACT:
The invention provides novel fluorine-containing bismaleimides represented by the general formula shown below. The bismaleimides are obtained by dehydrating and cyclizing reaction of corresponding bismaleamic acids which are also novel compounds. For example, maleic anhydride is used for preparing the bismaleamic acids. A mixture of a bismaleimide of the invention and a diamine is useful as a thermosetting resin composition. At 100.degree.-300.degree. C. the resin composition undergoes addition polymerization to turn into a solid resin which are high in moisture resistance and low in dielectric constant. For use in the resin composition it is preferable that both R.sup.1 and R.sup.2 in the general formula of the bismaleimide are --CF.sub.3. ##STR1## wherein A represents a divalent organic group having an ethylenic unsaturated bond; Rf represents fluorine atom or a perfluoroalkyl group; R.sup.1 and R.sup.2 are the same or different and each represent hydrogen atom, methyl group, ethyl group or a halogenated methyl group; and each -N< is at the m- or p-position with respect to the aromatic ether bond --O--.

REFERENCES:
patent: 4866185 (1989-09-01), Hartmann et al.
patent: 4904801 (1990-02-01), Butter et al.

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