Impregnating solutions based on at least one reactive thermoplastic poly (imide-amide) oligomer and a coreactant, which can be used especially for the production of preimpregnated intermediate articles
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United States of America Patent
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Nov 28, 1995
Grant Date -
N/A
app pub date -
Oct 1, 1993
filing date -
Apr 4, 1991
priority date (Note) -
Expired
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Abstract
The present invention relates to impregnating solutions consisting: of an active principle A+B in which: A denotes at least one thermoplastic poly(imide-amide) oligomer functionalized at the chain ends with an alkenyloxy, maleimido or nadimido group, B denotes a coreactant chosen from: B1=an imide ingredient, B2=an acrylate ingredient, B3=an alkenylphenol ingredient, B4=a novolac resin, B5=a vinyl ingredient, B6=an epoxy resin, B7=an amino ingredient and B8=a mixture of a number of ingredients B1 to B7; and of one or a number of aprotic polar solvent(s), the concentration of the active principle in the solution being between 2 and 80% by weight. These solutions are employed especially for the production of preimpregnated intermediate articles.
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