Cyclic oligomers comprising m-phenylene isophthalamide and polym

Details Cyclic oligomers comprising m-phenylene isophthalamide and polym Cyclic oligomers comprising m-phenylene isophthalamide and polym

1998-03-06

1999-10-19

Hampton-Hightower, P.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528323, 528367, 528371, C08G 7300, C08G 6900

Patent

active

059690810

ABSTRACT:
Disclosed herein are cyclic oligomers comprising substituted or unsubstituted m-phenylene isophthalamide, complexes of these oligomers with selected metal salts, novel methods for their preparation, and polymerization of the cyclic oligomers to linear aramids. The aramids are useful, for example, as fibers for fire resistant clothing. Amino-functional cyclic oligomers may be reacted with polyfunctional acyl halides to produce polyamides.

REFERENCES:
patent: 5189160 (1993-02-01), Memeger et al.
patent: 5276131 (1994-01-01), Akkapeddi et al.
patent: 5332800 (1994-07-01), Arduengo, III et al.
W. Memeger Jr., et al., Macromolecules, 26, 3476-3484, 1993.
W. Memeger, Jr., Polym. Prepr., 34, 71-72, 1993.
F. E. Elhadi et al., Tetrahedron Lett., 21, 4215-4218, 1980.
T. L. Guggenheim et al., Polymer Prepr., 30, 138-139, 1989.
Y. H. Kim et al., Abstracts of the 35th IUPAC Inter. Symposium on Macromolecules, University of Akron, Jul. 11-15, 1994.

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