Polyester compositions containing residues of dihydroxyalkoxy co

Details Polyester compositions containing residues of dihydroxyalkoxy co Polyester compositions containing residues of dihydroxyalkoxy co

1980-11-28

1982-08-31

Lee, Lester L.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528193, 528195, C08G 6366

Patent

active

043473504

ABSTRACT:
UV stable linear polyesters, e.g. polyethylene terephthalate, contain in their chain copolymerized esterification residues of di(hydroxyalkoxy)coumarins. The polyesters are useful for making biaxially oriented films. The polyesters can be made by polycondensation in the presence of 4-methyl-6,7-dihydroxy-coumarin.

REFERENCES:
patent: 3994907 (1976-11-01), Domergue
patent: 4057532 (1977-11-01), Saferstein
patent: 4224433 (1980-09-01), Calundann
patent: 4284756 (1981-08-01), Horner
European Patent Application, published 9-1-80, #6686, Horner et al.

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