Abstract: Novel compositions comprising unsaturated polyimide-polyamides and processes for their preparation are disclosed herein. These new compositions are primarily derivatives of anhydride-terminated aromatic polyimides from which they are prepared by amidation to provide unsaturated amide groups having terminal --CH.dbd.CH.sub.2 groups. These new compositions are more tractable than the original anhydride-terminated polyimides and can be converted at appropriate lower temperatures to crosslinked, insoluble, infusible polymers without by-product formation thereby extending greatly the applications for which the aromatic polyimides can be employed. Also included are monomeric compounds containing unsaturated amide groups derived from monomeric tetracarboxylic dianhydrides. These are particularly useful as crosslinking agents.

Abstract: Novel compositions comprising acetylenic polyimide-polyamides and processes for their preparation are disclosed herein. These new compositions are primarily derivatives of anhydride-terminated aromatic polyimides from which they are prepared by amidation to provide acetylenic amide groups having terminal --C.dbd.CH groups. These new compositions are more tractable than the original anhydride-terminated polyimides and can be converted at appropriate lower temperatures to crosslinked, insoluble, infusible polymers without by-product formation thereby extending greatly the applications for which the aromatic polyimides can be employed. Also included are monomeric compounds containing acetylenic amide groups derived from monomeric tetracarboxylic dianhydrides. These are particularly useful as crosslinking agents.

Abstract: Novel compositions comprising polymerization products of polyimide derivatives having unsaturated amide groups and processes for their preparation are disclosed herein. These new compositions are primarily polymers of derivatives of anhydride-terminated aromatic polyimides from which these derivatives are prepared by amidation to provide unsaturated amide groups having terminal --CH.dbd.CH.sub.2 groups as hemi-amic acid groups or their derivatives. These derivative compositions are more tractable than the original anhydride-terminated polyimides and can be converted at appropriate lower temperatures and in accordance with the practive of this invention to crosslinked, insoluble, infusible polymers without by-product formation thereby extending greatly the applications for which the aromatic polyimides can be employed. Also included are polymers from monomeric compounds containing unsaturated amide groups derived from monomeric tetracarboxylic dianhydrides.

Abstract: The copolymers disclosed herein comprise the reaction products of polyoxirane or polyepoxide compounds with amine-terminated aromatic polyimides. The reaction of the oxirane group with the amine group produces hydroxylamine groups which connect the polyimide portion with the polyepoxide precursor portion of the resultant copolymer without by-product formation. These copolymers are more tractable than the original unreacted amine-terminated polyimides and can be converted at appropriate lower temperatures to insoluble, infusible polymers. Thus they can be fabricated economically at lower temperatures and pressures and extend greatly the number of applications for which the aromatic polyimides can be employed.