CURED FIBROUS COMPOSITES PREPARED FROM THE RESINOUS REACTION PRODUCTS OF HYDROXY AROMATIC MONO-ALDEHYDES AND METHYLATED PYRIDINES OR METHYLATED PYRAZINES, AND PREPOLYMERS PREPAREDFROM HYDROXY AROMATIC MONO-ALDEHYDES AND METHYLATED PYRAZINES

摘要

64693-3580DABSTRACTThis invention is directed to a thermosettableprepolymer characterized as comprising the resinous reactionproduct of one or more hydroxy aromatic mono-aldehydes and one ormore methylated pyrazines, the methylated pyrazines having thestructural formulawherein R is hydrogen, methyl or ethyl and the number of methylgroups on the ring is from 2 to 4.