Transparent polymer blends and articles prepared therefrom

Details Transparent polymer blends and articles prepared therefrom Transparent polymer blends and articles prepared therefrom

2011-06-28

2011-06-28

Woodward, Ana L (Department: 1765)

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

C428S034100, C428S035200, C428S035700, C428S035900, C428S036600, C428S036700, C428S474400, C428S475200, C428S475500, C525S420000, C525S425000, C525S432000, C525S433000

Reexamination Certificate

active

07968164

ABSTRACT:
Disclosed are polymer compositions having high transparency and low haze comprising immiscible blends of one or more thermoplastic polymers selected from polyesters, polycarbonates, and polyarylates, and a copolyamide or a transamidized, homogeneous blend of a least two polyamides. The components of the immiscible blend which have refractive indices which differ by about 0.006 to about −0.0006. The small difference in the refractive indices enable the incorporation of regrind into the polymer composition to produce transparent shaped articles. The blends of the present invention are useful in producing shaped articles such as, for example, sheeting, films, tubes, bottles, preforms and profiles. These articles may have one or more layers and can exhibit improved excellent barrier properties and good melt processability while retaining excellent mechanical properties. Metal catalysts can be incorporated into the compositions to produce oxygen-scavenging compositions.

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