The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 18, 2008
Filed:
Mar. 10, 2005
Osamu Morimoto, Ohtsu, JP;
Hideki Tanaka, Ohtsu, JP;
Kayoko Takino, Ohtsu, JP;
Katsuya Shimeno, Ohtsu, JP;
Yasunari Hotta, Ohtsu, JP;
Osamu Morimoto, Ohtsu, JP;
Hideki Tanaka, Ohtsu, JP;
Kayoko Takino, Ohtsu, JP;
Katsuya Shimeno, Ohtsu, JP;
Yasunari Hotta, Ohtsu, JP;
Toyo Boseki Kabushiki Kaisha, Osaka, JP;
Abstract
There is provided an aqueous resin composition excellent in settability, flexibility, retort resistance, hygienicity, sprayability and dispersibility in water, and used to coat an internal surface of a can. The aqueous resin composition contains: polyester resin having a specific structure in a molecular chain thereof and/or at a terminal of the molecular chain, the polyester resin having added thereto an opened ring of a compound having a molecule with a carboxylic anhydride group therein, at least no less than 10% by mole of the compound being a compound having a molecule with no less than two carboxylic anhydride groups, the polyester resin having a resin acid value of 150 to 800 eq/10g and a number-average molecular weight of 5,000 to 100,000; resol-type phenol resin corresponding to a copolymer of a formaldehyde and a phenol compound containing no less than 50% by weight of a phenol compound having no less than three reactive point with formaldehyde, the resol-type phenol resin having no less than one alkoxy methyl group on average per aromatic nucleus; a basic compound; and water, or water and an organic solvent.