Thermosetting quinazolone resins their preparation and their applications
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United States of America Patent
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Jun 5, 1990
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N/A
app pub date -
Feb 22, 1989
filing date -
Feb 23, 1988
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Expired
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Abstract
Thermosetting quinazolone resins, their preparation and their applicationsre described. These thermosetting quinazolone resins can be defined as having the following general formula: ##STR1## in which Ar.sup.1 is a bivalent mono- or polycyclic aromatic radical and Ar.sup.2 is a bivalent aromatic radical of several simple aromatic rings bound two by two by atoms or bivalent groups. These Ar.sup.1 and Ar.sup.2 radicals are chosen so that the melting or emollescence temperature is between 80.degree. C. and 170.degree. C. The resins can be prepared from condensation of an ethynylarylbenzoxazinone with an aromatic diamine containing flexibilizing groups. These quinazolone resins can be polymerized in bulk in order to prepare adhesives or composite matrices in particular.
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