Abstract: [Problem to be solved] To provide a traceable vinyl acetate, a polymer containing the vinyl acetate, and a vinyl alcohol polymer which is a saponified product of the polymer. [Solution] Vinyl acetate having a ratio of carbon-14 to total carbon of 1.0×10?4 or more, a vinyl acetate polymer containing the vinyl acetate as a monomer unit and a vinyl alcohol polymer obtained by saponifying the vinyl acetate polymer.

Abstract: Provided by the present invention is an ethylene-vinyl alcohol copolymer resin composition having superior appearance characteristics (particularly decreased coloring and unevenness of the hue), and is accompanied by suppressed occurrence of yellowing, etc., in melt molding. An ethylene-vinyl alcohol copolymer resin composition containing an ethylene-vinyl alcohol copolymer (A) and a compound having an enediol structure (B), in which a molar ratio of the compound (B) to vinyl alcohol units of the ethylene-vinyl alcohol copolymer (A) is 2.70×10?9 or greater and 2.70×10?5 or less.

Abstract: An object of the present invention is to provide an EVOH-containing resin composition which has superior appearance characteristics and long-run workability in melt molding and enables occurrence of yellowing etc., in melt molding to be inhibited particularly, even in melt molding at high temperatures of, for example, no less than 260° C. Further provided is a multilayered structure molded from the composition. The present invention provides a resin composition containing (A) an ethylene-vinyl alcohol copolymer, (B) a carboxylic acid and/or a carboxylate ion, and (C) a metal ion, wherein the component (B) includes (B2) a multivalent carboxylic acid and/or a multivalent carboxylate ion, and the molar ratio (B2/C) of the multivalent carboxylic acid and the multivalent carboxylate ion (B2) to the metal ion (C) is 0.002 or greater and 2 or less.

Abstract: Provided by the present invention is an ethylene-vinyl alcohol copolymer resin composition having superior appearance characteristics (particularly decreased coloring and unevenness of the hue), and is accompanied by suppressed occurrence of yellowing, etc., in melt molding. An ethylene-vinyl alcohol copolymer resin composition containing an ethylene-vinyl alcohol copolymer (A) and a compound having an enediol structure (B), in which a molar ratio of the compound (B) to vinyl alcohol units of the ethylene-vinyl alcohol copolymer (A) is 2.70×10?9 or greater and 2.70×10?5 or less.

Abstract: An object of the present invention is to provide an EVOH-containing resin composition which has superior appearance characteristics and long-run workability in melt molding and enables occurrence of yellowing etc., in melt molding to be inhibited particularly, even in melt molding at high temperatures of, for example, no less than 260° C. Further provided is a multilayered structure molded from the composition. The present invention provides a resin composition containing (A) an ethylene-vinyl alcohol copolymer, (B) a carboxylic acid and/or a carboxylate ion, and (C) a metal ion, wherein the component (B) includes (B2) a multivalent carboxylic acid and/or a multivalent carboxylate ion, and the molar ratio (B2/C) of the multivalent carboxylic acid and the multivalent carboxylate ion (B2) to the metal ion (C) is 0.002 or greater and 2 or less.