Intermediates anhydrides useful for synthesizing etherimides

Details Intermediates anhydrides useful for synthesizing etherimides Intermediates anhydrides useful for synthesizing etherimides

1988-06-30

1991-02-05

Shah, Mukund J.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548467, 548473, 548517, C07D491052

Patent

active

049906240

ABSTRACT:
Polyetherimide oligomers having crosslinking end cap moieties which provide improved solvent-resistance to cured composites are generally represented by the formula: ##STR1## wherein ##STR2## E=allyl or methallyl; R=a trivalent C.sub.(6-13) aromatic organic radical;
R.sub.1 =any of lower alkyl, lower alkoxy, aryl, or substituted aryl;
R'=a divalent C.sub.(6-30) aromatic organic radical;
j=0, 1, or 2; and
G=--CH.sub.2 --, --O--, --S--, or --SO.sub.2 --
Blends generally comprise substantially equimolar amounts of the oligomers and a comparable, compatible, noncrosslinking, etherimide polymer of substantially the same backbone. The crosslinkable oligomers are made by reacting substituted phthalic anhydrides with hydroxyaryl amines and suitable crosslinking end cap reactants, or by self-condensation of phthalimide salts followed by capping of the polymers. Related polyetherimides of the present invention can be prepared by the condensation of nitrophthalic anhydride, diamines, dialcohols (dihydricphenols), and phenolic, crosslinking end caps (A--OH), or the condensation of bis(phenates) or dialcohols (bisphenols), diamines, nitrophthalic anhydride, and amine-terminated end caps (A--NH.sub.2) or nitro-terminated end caps (A--NO.sub.2).
Useful intermediates include those compounds made by condensing A--XH or A--NH.sub.2 with a substituted phthalic anhydride.

REFERENCES:
patent: 4520198 (1985-05-01), D'Alelio et al.

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