Polyester compositions, shaped articles obtained from them and p

Details Polyester compositions, shaped articles obtained from them and p Polyester compositions, shaped articles obtained from them and p

1981-04-23

1982-06-15

Milestone, Norma S.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D31186

Patent

active

043350461

ABSTRACT:
UV stable linear polyesters, e.g. PET, contain in their chain copolymerized bis(hydroxyalkoxy)xanth-9-ones, preferably 3,6-bis-(2-hydroxyethoxy)xanth-9-ones. The polymers are obtained by polymerization in the presence of a tetrahydroxy benzophenone, preferably the 2,240 ,4,4'-isomer. The method of polymerizing in the presence of dihydric phenols to obtain ethoxyaryloxy polyesters is also described.

REFERENCES:
patent: 3288755 (1966-11-01), Griehl et al.
patent: 3391110 (1968-07-01), Coleman

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