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...
Reexamination Certificate
2007-10-30
2007-10-30
Anthony, Joseph D. (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...
C524S301000, C524S306000, C524S307000, C524S315000, C524S440000, C524S605000, C525S211000, C525S425000, C525S432000, C428S035700, C428S036700
Reexamination Certificate
active
11292441
ABSTRACT:
A solid concentrate is provided having a combination of a transition metal present in an amount ranging from 1000 to 40,000 ppm (weight by metal) and a polyester polymer present in an amount of at least 40 wt. % based on the weight of the concentrate. Concentrates made with highly modified polyester polymers are easy to compound with transition metals forming less brittle polymer upon melt extrusion. Bottle preforms and oxygen scavenging bottles can be made from these concentrates by combining solid polyester particles, solid polyamide particles, and solid these concentrate particles c into an melt processing zone, forming a melt, and forming an article directly from the melt. The b* color and the L* color and the haze levels of the preforms are improved over the preforms made with liquid carriers instead of solid concentrates. The particles are also advantageously simultaneously dried in a drying zone under conditions effective to at least partially remove moisture from the blend to thereby further improve the b* color and L* color.
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Clark Thomas Roger
Estep Robert Noah
Gamble Benjamin Bradford
Sharpe, Jr. Emerson Eston
Stafford Steven Lee
Anthony Joseph D.
Eastman Chemical Company
Graves, Jr. Bernard J.
Knight Jennifer R.
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