Polyetherimides and precursors therefor from oxydiphtalic anhydr

Details Polyetherimides and precursors therefor from oxydiphtalic anhydr Polyetherimides and precursors therefor from oxydiphtalic anhydr

1988-07-15

1989-10-17

Kight, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528183, 528188, 528207, 528351, 528353, 524600, 25218228, C08G 7310

Patent

active

048748358

ABSTRACT:
Polyetherimide precursor compositions are prepared by a reacting mixture of at least two diamines selected from the group consisting of o-phenylenediamine, m-phenylenediamine and 4-aminophenyl ether with the esterification product of a low molecular weight alkanol such as methanol and an ether tetracarboxylic acid dianhydride, preferably 3,4-dicarboxyphenyl ether dianhydride. Said polyimide precursor compositions may be converted to polyimides useful in composite formation, by gently heating to remove excess alkanol and subsequently baking at temperatures in the range of about 275.degree.-375.degree. C.

REFERENCES:
patent: 3312663 (1967-04-01), Sorenson
patent: 3326851 (1967-09-01), Tocker
patent: 3349061 (1967-10-01), Pruckmayr
patent: 3376260 (1968-04-01), Fritz
patent: 3745149 (1973-07-01), Serafini et al.
patent: 4720539 (1988-01-01), Rabilloud et al.

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