Polyimide oligomers and blends

A method for making a polyimide comprising the steps of:

• (a) reacting a hydroxyl-substituted hub having at least three radiating arms with nitrophthalic anhydride to form an etheranhydride intermediate having at least three radiating arms each of which contains an anhydride functionality;
• and
• (b) condensing the etheranhydride intermediate with an amine-end cap having the formula of:
• ##STR38## wherein X is ##STR39## R.sub.1 is lower alkyl, lower alkoxy, aryl, substituted aryl, substituted alkyl, aryloxy, or halogen;
• j is 0, 1, or 2;
• Me is methyl;
• n is 1 or 2;
• G is --SO.sub.2 --, --CH.sub.2 --, --S--, or --O--;
• and
• E is methallyl or allyl.

A compound comprising the condensation product of substantially stoichiometric amounts of an etheranhydride and an amine end cap, the amine end cap having the formula ##STR40## wherein X is ##STR41## R.sub.1 is lower alkyl, lower alkoxy, aryl, substituted aryl, substituted alkyl, aryloxy, or halogen;

• n is 1 or 2;
• j is 0, 1 or 2;
• E is methallyl or allyl;
• Me is methyl;
• and
• G is --SO.sub.2 --, --CH.sub.2 --, --S--, or --O--;
• and
• the etheranhydride having the formula ##STR42## wherein Ar is an aromatic moiety;
• and w is an integer greater than or equal to 3.

A compound selected from the group consisting of:

• ##STR45## wherein Ar is an aromatic moiety;
• w is 3 or 4;
• n is 1 or 2;
• R.sub.10 is a residue of a diamine;
• R.sub.11 is a residue of a dianhydride;
• X is:
• ##STR46## R.sub.1 is lower alkyl, lower alkoxy, aryl, substituted aryl, substituted alkyl, aryloxy, or halogen;
• j is 0, 1, or 2;
• Me is methyl;
• G is --SO.sub.2 --, --CH.sub.2 --, --S--, or --O--;
• and
• E is methallyl or allyl.

A method for making a polyimide comprising the steps of:

• (a) reacting a halo-substituted aromatic hub with aminophenol to form an etherimine having the formula:
• ##STR47## wherein Ar is the residue of the aromatic hub and w is an integer greater than or equal to 3;
• and
• (b) reacting the etheramine with a monoanhydride end cap having the formula:
• ##STR48## wherein X is ##STR49## R.sub.1 is lower alkyl, lower alkoxy, aryl, substituted aryl, substituted alkyl, aryloxy, or halogen;
• j is 0, 1, or 2;
• Me is methyl;
• and
• G is --SO.sub.2 --, --CH.sub.2 --, --S--, or --O--.