Gas barrier polyurethane resin

Details Gas barrier polyurethane resin Gas barrier polyurethane resin

2005-12-27

2005-12-27

Sergent, Rabon (Department: 1711)

Stock material or miscellaneous articles

Composite

Of polyamidoester

C428S425100, C428S425500, C428S425800, C428S425900, C524S442000, C524S591000, C524S839000, C524S840000, C528S028000, C528S044000, C528S071000, C528S085000

Reexamination Certificate

active

06979493

ABSTRACT:
A polyurethane resin having a total concentration of the urethane group and the urea group of not less than 15% by weight is prepared by reacting a diisocyanate component (e.g., an aromatic diisocyanate) with a diol component (e.g., a C2–8alkylene glycol). The repeating unit of the polyurethane resin may contain a constitutive unit of an aromatic or alicyclic compound. The polyurethane resin may be shaped into a film for use as a gas barrier film. The film may be a gas barrier composite film composed of a base film layer and a resin layer at least comprising the polyurethane resin. The present invention provides a polyurethane resin excellent in gas barrier properties against water vapor, oxygen, aromatics, and others, and a film containing the same.

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M. Salame et al., “Prediction of Gas Barrier Properties of High Polymers”, Polymer Engineering and Science, vol. 26, No. 22, Dec. 1986.

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