Gas barrier polyurethane resin
July 19, 2020. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3352830 3879330 3889031 Coating composition and its use for the preparation of oxygen barrier coatings on plastic articles Manufacture of polymeric products Food package comprised of polymer with thermally responsive permeability Tubular casing with an organochlorine-free coating impermeable to oxygen and water vapor, a process for its production and its use Packaging materials having oxygen barrier quality Gas barrier resin composition and its film and process for producing the same Laminate, laminate film and shaped article comprising inorganic laminar compound InventorsAssigneeApplicationNo. 619639 filed on 07/19/2000US Classes:428/423.1, Of polyamidoester (polyurethane, polyisocyanate, polycarbamate, etc.)428/425.1, Next to cellulosic428/425.5, Next to silicon-containing (silicone, cement, etc.) layer428/425.8, Next to free metal428/425.9, Particulate metal or metal compound-containing524/442, Soil or inorganic silicon DNRM (other than silicon dioxide, glass, quartz, novaculite, or silicon dioxide type)524/591, Water DNRM524/839, Solid polymer or SICP derived from -N=C=X (X is chalcogen) containing reactant524/840, N=C=X reactant has ionic group attached thereto, e.g., carboxyl sulfonic, etc.528/44, FROM REACTANT HAVING AT LEAST ONE -N=C=X GROUP (WHEREIN X IS A CHALCOGEN ATOM) AS WELL AS PRECURSORS THEREOF, E.G., BLOCKED ISOCYANATE, ETC.528/85With reactant containing at least two -XH groupsExaminersPrimary: Sergent, RabonAttorney, Agent or FirmForeign Patent References
International ClassesB32B 027/06B32B 027/10 B32B 027/12 B32B 027/40 C08L 075/04 Foreign Application Priority Data1999-07-27 JPAbstractA 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.Other References
Field of SearchOf polyamidoester (polyurethane, polyisocyanate, polycarbamate, etc.)Next to silicon-containing (silicone, cement, etc.) layer Next to free metal Particulate metal or metal compound-containing Next to cellulosic Water DNRM N=C=X reactant has ionic group attached thereto, e.g., carboxyl sulfonic, etc. Solid polymer or SICP derived from -N=C=X (X is chalcogen) containing reactant Soil or inorganic silicon DNRM (other than silicon dioxide, glass, quartz, novaculite, or silicon dioxide type) FROM REACTANT HAVING AT LEAST ONE -N=C=X GROUP (WHEREIN X IS A CHALCOGEN ATOM) AS WELL AS PRECURSORS THEREOF, E.G., BLOCKED ISOCYANATE, ETC. With reactant containing at least two -XH groups | |
