Dienophile additives to polyvinylidene chloride copolymers

Details Dienophile additives to polyvinylidene chloride copolymers Dienophile additives to polyvinylidene chloride copolymers

2005-06-28

2005-06-28

Kiliman, Leszek B (Department: 1773)

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

C428S036700, C428S314800, C428S361000, C428S518000, C428S520000

Reexamination Certificate

active

06911242

ABSTRACT:
A flexible film for packaging articles such as food is provided. The film comprises a layer of polyvinylidene (“PVdC”) homopolymer, polyvinylidene and methyl acrylate (“PVdC-MA”) copolymer or other polyvinylidene chloride copolymer. A dienophile such as, for example, ethyl trans-cinnamate, methyl trans-cinnamate, dibutyl maleate, dimethyl maleate or maleic anhydride is blended with the PVdC polymer or PVdC-MA copolymer to reduce yellowing of the film caused by degradation of the PVdC or PVdC-MA through heat or electron beam irradiation. Preferably a range of about 0.05% and about 5% by weight of the dienophile is added to the PVdC or PVdC-MA.

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