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:
Mar. 06, 2012
Filed:
May. 20, 2008
Shinichi Yonehama, Kanagawa, JP;
Shigeyuki Hirose, Kanagawa, JP;
Shinichi Ayuba, Kanagawa, JP;
Eiichi Honda, Kanagawa, JP;
Masayoshi Takahashi, Kanagawa, JP;
Kana Kumamoto, Kanagawa, JP;
Shinichi Yonehama, Kanagawa, JP;
Shigeyuki Hirose, Kanagawa, JP;
Shinichi Ayuba, Kanagawa, JP;
Eiichi Honda, Kanagawa, JP;
Masayoshi Takahashi, Kanagawa, JP;
Kana Kumamoto, Kanagawa, JP;
Mitsubishi Gas Chemical Company, Inc., Tokyo, JP;
Abstract
The present invention provides an amine based epoxy resin curing agent and an epoxy resin composition containing the curing agent. The epoxy resin composition has a high gas barrier performance, a long pot life, and utility as a coating material or an adhesive for laminates. The amine based epoxy resin curing agent is composed of a reaction product of (A), (B) and (D) or (A), (B), (C) and (D): (A) m-xylylenediamine or p-xylylenediamine; (B) a polyfunctional compound having at least one acyl group, which is capable of forming an amide group site through a reaction with a polyamine and forming an oligomer; (C) a monovalent carboxylic acid having from 1 to 8 carbon atoms and/or its derivative; and (D) a functional compound having at least one carbonate site represented by the formula (2), which is capable of forming a carbamate site represented by the formula (1) through a reaction with a polyamine: