Polyester composition, films made thereof and process for...

Details Polyester composition, films made thereof and process for... Polyester composition, films made thereof and process for...

2006-06-13

2006-06-13

Robertson, Jeffrey B. (Department: 1712)

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

C524S366000, C524S378000, C525S408000, C525S437000

Reexamination Certificate

active

07060749

ABSTRACT:
A polyester composition includes a ligand capable of coordinating to a metal or metal ion, wherein the ligand includes at least one donor atom selected from the group consisting of a nitrogen atom, a sulfur atom, and an oxygen atom. Consequently, it is possible to inactivate a metal catalyst which adversely affects heat resistance. As a result, it is possible to obtain polyester compositions and films having excellent heat resistance, colorability, and weathering resistance. Moreover, in the process of producing a polyester, by separating and recovering a catalyst by adding a ligand which is capable of coordinating to a metal or metal ion and which includes at least one donor atom selected from the group consisting of a nitrogen atom, a sulfur atom, and an oxygen atom, it is possible to improve the heat resistance of the polyester composition.

REFERENCES:
patent: 3687978 (1972-08-01), Pedersen
patent: 4215032 (1980-07-01), Kobayashi et al.
patent: 4795771 (1989-01-01), Yoshihara
patent: 5399605 (1995-03-01), Yoshihara et al.
patent: 5431856 (1995-07-01), Okoniewski et al.
patent: 5475480 (1995-12-01), Cahill et al.

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