Poly(N-substituted iminocarbonate)

Details Poly(N-substituted iminocarbonate) Poly(N-substituted iminocarbonate)

1990-11-05

1993-03-16

Anderson, Harold D.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528 86, 528219, C08G 6700

Patent

active

051945703

ABSTRACT:
Poly(N-phenyl urethanes) and methods of preparing same by heating poly(N-phenyl iminocarbonates) to a temperature above 250.degree. C. so that the backbone of the polyiminocarbonate rearranges to form the poly(N-phenyl urethane). Poly(N-substituted iminocarbonates and methods of preparing same by suspending a dialkaline diphenol in an aprotic solvent at a basic pH and adding to the suspension an N-substituted iminophosgene. Methods for making heat-stable articles by forming an article from a poly(N-phenyl iminocarbonate) while heating the article to a temperature above about 250.degree. C. so that the poly(N-phenyl iminocarbonate) rearranges to form a poly(N-phenyl urethane).

REFERENCES:
patent: 3373139 (1968-03-01), Morgan
patent: 3491060 (1970-01-01), Schminke et al.
Mukaiyama et al., J. Org. Chem., 27, 3337 (Sep. 1962).
Fujisawa et al., Bull. Chem. Soc. Japan, 37(6) 793 (1964).
Macromolecular Syntheses, vol. 4, (Bailey, W. J., ed., John Wiley and Sons 1972).
Hendrickson et al., Organic Chemistry (Third Edition, McGraw-Hill, New York 1970), 90-94.

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