Crystalline polyetherimides and polyamic acid precursors therefo

Details Crystalline polyetherimides and polyamic acid precursors therefo Crystalline polyetherimides and polyamic acid precursors therefo

1984-09-04

1986-07-08

Lee, Lester L.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528352, 528353, C08G 7310

Patent

active

045993963

ABSTRACT:
Crystalline polyetherimides having equilibrium melting points below 400.degree. C. are obtained by the reaction of various p-linked polycyclic tetracarboxylic acids or their functional derivatives with p-linked polycyclic diamines. The structural units in said crystalline polyetherimides contain at least 7 aromatic rings.

REFERENCES:
patent: 4417044 (1983-11-01), Parekh
patent: 4429102 (1984-01-01), Evans et al.
patent: 4443591 (1984-04-01), Schmidt et al.
patent: 4444979 (1984-04-01), St. Clair et al.
St. Clair et al., J. Poly. Sci., Polymer Chem. Ed., 15, 1529-1533, (1977).
Takekoshi et al., ACS Polymer Preprints, 24, 312 (1983).
Adrova et al., Polyimides (Stamford, CT: Technomic Pub. Co., 1970), pp. 1, 102-103.

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