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:
Jul. 22, 2003
Filed:
Jul. 30, 2001
Tatsuya Oshita, Kurashiki, JP;
Goki Uehara, Kurashiki, JP;
Nobuhisa Senda, Kurashiki, JP;
Yoshiki Takeda, Kurashiki, JP;
Yukiatsu Komiya, Kurashiki, JP;
Syuichi Kanao, Kurashiki, JP;
Shigeki Takada, Kurashiki, JP;
Naoki Kawakami, Kurashiki, JP;
Kanenori Ito, Sakai, JP;
Kuraray Co., Ltd., Kurashiki, JP;
Abstract
A vinyl alcohol polymer composition (II) is produced by a process of providing a reaction liquid comprising a solution containing a vinyl carboxylate polymer and, a first metal alkoxide (I) having at least one functional group and/or an oligomer (I) having at least one functional group obtained from said metal alkoxide (I); a step of simultaneously effecting (a) saponification of said vinyl carboxylate polymer and (b) reaction in which at least part of the functional groups of said metal alkoxide (I) and/or said oligomer (I) participates, thereby obtaining a vinyl alcohol polymer composition (I); and a step of preparing a solution (A) containing said vinyl alcohol polymer composition (I), followed by adding to the solution (A) a second metal alkoxide (II) and/or an oligomer (II) obtained from the metal alkoxide (II) or another solution (B) containing the metal alkoxide (II) and/or the oligomer (II) derived from the metal alkoxide (II), to prepare an intermediate product solution (C), and then removing the solvent from said solution (C). The vinyl alcohol polymer composition obtained by the above process has excellent gas-barrier properties, in particular excellent gas-barrier properties under high-humidity conditions. The vinyl alcohol polymer composition is suitably usable as a coating agent having good storage stability and little uneven applicability, and as gas-barrier material, in particular laminate having excellent gas-barrier properties under high-humidity conditions.