Cyclic oligomers for production of linear polyketones, polyphtha

Details Cyclic oligomers for production of linear polyketones, polyphtha Cyclic oligomers for production of linear polyketones, polyphtha

1994-03-01

1995-04-11

Kight, III, John

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

Organic compounds

Unsubstituted hydrocarbyl chain between the ring and the -c-...

568 31, 568337, 528126, 528171, 528174, 528226, 528229, 528176, 528179, 528225, C07D49800

Patent

active

054059569

ABSTRACT:
Low molecular weight cyclic oligomers of formula (I) ##STR1## in which n is an integer of 2 to 20, and each C in the oligomer is a radical of formula (II): ##STR2## and each X in the oligomer is --O--R--O-- or --S--R--S--, B and D are both carbonyl groups CO, or together represent a divalent radical of formula ##STR3## in which A.sub.1, A.sub.2, A.sub.3 A.sub.4, Ar.sub.1, Ar.sub.2 and Ar.sub.3 are selected from a variety of aromatic radicals, A.sub.1, A.sub.2, Ar.sub.3 and Ar.sub.4 also possibly being hydrogen, are useful in the production of high molecular weight, linear, polyketones, polyphthalazines and polyisoquinolines; the cyclic oligomers have low melt viscosities when heated above their softening temperatures and can be readily molded, whereafter they can be rings-open polymerized to form molded high molecular weight polymer products with excellent properties.

REFERENCES:
patent: 4959454 (1990-09-01), Fukuyama
patent: 5107029 (1992-04-01), Walker, Jr. et al.
patent: 5264520 (1993-11-01), Mullins et al.
patent: 5264538 (1993-11-01), Mullins et al.
patent: 5306789 (1994-04-01), Hay et al.
patent: 5338881 (1994-08-01), Walker, Jr. et al.
Concise Encyclopedia of Polymer Science and Engineering, J. I. Kroschwitz pp. 1006-1008, John Wiley & Sons.
Opening Rings to Polyethers, Mullins et al, American Chemical Society, 1003, Chemtech Aug. 1993, pp. 25-28.

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