Polymerization of 2,3,4,5-tetrahydro-4-oxo-1-benzoxepin-5-ones

Details Polymerization of 2,3,4,5-tetrahydro-4-oxo-1-benzoxepin-5-ones Polymerization of 2,3,4,5-tetrahydro-4-oxo-1-benzoxepin-5-ones

1976-07-23

1978-06-20

Lee, Lester L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 783R, C08G 6308, C08G 6310

Patent

active

040961192

ABSTRACT:
The reaction product of salicylic acid esters and an alkylene oxide may be cyclized into a compound of the general formula: ##STR1## where R' is a radical selected from the group consisting of aryl, aliphatic and hydrogen. Specifically R' may be C.sub.1 -C.sub.10 alkyl, halogenated alkyl, alkyl ester, unsaturated aliphatic phenyl, substituted phenyl and hydrogen. These compounds are useful as antirhumatics. The compounds may also be converted into polyol crosslinking agents for polyurethane foams. These compounds may also be polymerized into polyesters by heating with a catalyst. Such a polymerization is a ring opening route and leaves no residue such as is found in condensation polymerization. Depending on the molecular weight attained these polyesters could be used as films, coatings and fibers, for example.

REFERENCES:
patent: 2696481 (1954-12-01), Schneider
patent: 3039994 (1962-06-01), Gleim
patent: 3849377 (1974-11-01), Boehmke

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