Method to make single-layer PET bottles with high barrier...

Details Method to make single-layer PET bottles with high barrier... Method to make single-layer PET bottles with high barrier...

2011-04-05

2011-04-05

Woodward, Ana L (Department: 1765)

Stock material or miscellaneous articles

Hollow or container type article

C428S035700, C428S036900, C524S413000, C524S435000, C524S538000, C525S425000

Reexamination Certificate

active

07919159

ABSTRACT:
The present invention comprises a blend of polyester and a partially aromatic polyamide with an ionic compatibilizer and a cobalt salt. This blend can be processed into a container that has both active and passive oxygen barrier and carbon dioxide barrier properties at an improved color and clarity than containers known in the art. The partially aromatic polyamide is preferably meta-xylylene adipamide. The ionic compatibilizer is preferably 5-sodiumsulfoisophthalic acid or 5-zincsulfoisophthalic acid, or their dialkyl esters such as the dimethyl ester (SIM) and glycol ester (SIPEG). The cobalt salt is selected form the class of cobalt acetate, cobalt carbonate, cobalt chloride, cobalt hydroxide, cobalt naphthenate, cobalt oleate, cobalt linoleate, cobalt octoate, cobalt stearate, cobalt nitrate, cobalt phosphate, cobalt sulfate, cobalt (ethylene glycolate), or mixtures of two or more of these. The partially aromatic polyamide is present in a range from about 1 to about 10 wt. % of said composition. The ionic compatibilizer is present in a range from about 0.1 to about 2.0 mol-% of said composition. The cobalt salt is present in a range from about 20 to about 500 ppm of said composition.

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Mitsubishi Gas Chemical Company, Inc., Nylon-MXD6, Superior Perfrmance in Barrier Packaging; website—www.mgc-a.com/Pages/MXD6/media/Mxd6brA4.pdf.

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