Oxygen-scavenging resin compositions having low haze

Details Oxygen-scavenging resin compositions having low haze Oxygen-scavenging resin compositions having low haze

2007-07-17

2007-07-17

Yoon, Tae H (Department: 1714)

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...

C524S400000

Reexamination Certificate

active

10808632

ABSTRACT:
A resin composition provides good optical properties when stretched and efficient oxygen-scavenging, the resin composition comprising a film-forming polyester and an effective amount of oxygen-scavenging particles, wherein the particles have a particle size distribution such that particles of less than about 25 microns in size do not exceed a concentration defined by a formula that includes the apparent density of the particles. Another resin composition comprises a film-forming polyester and from about 50 to about 2500 parts by weight of iron per million by weight of the resin, wherein the amount of iron particles having a size of less than about 20 microns does not exceed about 800 parts per million by weight of the resin. A method is also provided for incorporating high levels of oxygen-scavenging particles into a film-forming polyester resin composition with low haze when stretched.

REFERENCES:
patent: 6369148 (2002-04-01), Chiang et al.
patent: 6780916 (2004-08-01), Tung et al.
Technical Data Sheet for ISCM ron Powder A-131 by North American Hoganas, No. 817C 818C 2001.

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