Poly(heterocyclic) polymers

Details Poly(heterocyclic) polymers Poly(heterocyclic) polymers

1989-03-17

1990-04-03

Kight, John

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

Synthetic resins

From ketone or ketene reactant

528226, 528229, 528289, 528290, 528291, 528294, 528295, 528298, 528299, 528300, 528335, 528373, 528403, 525437, 525461, 525462, 525470, 525471, 525534, C08G 802

Patent

active

049141767

ABSTRACT:
Novel thermoplastic polymers of relatively high glass transition temperatures are characterized by five-carbon moieties having a keto group in the 3-position alternating with bis(benzoheterocyclic) moieties. The polymers are produced by reaction of a keto-C.sub.5 source, selected from 4-oxoheptanedioic acid compounds or a 1,6-dioxa [4.4] spirodilactone, with a bis(ortho-phenylene amine) compound. Further cyclization of the initial polymer product or reaction of a bis(ortho-phenylenediamine) provides a polymer having a hexacyclic repeating unit.

REFERENCES:
patent: 3969294 (1976-07-01), Papouchado
patent: 4100140 (1978-07-01), Zahir et al.
patent: 4663464 (1987-05-01), Hoekstra
patent: 4800231 (1989-01-01), Wang
patent: 4847388 (1989-09-01), Wang

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