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AssigneeKuraray Co.Ltd.
InventorsKazuyori Yoshimi, Osamu Kazeto, Masako Katayama
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A saponified ethylene-vinyl acetate resin, containing from 0.1 to 3000 ppm of a compound having a molecular weight of at most 1000 and having at least one conjugated double bond, an alkoxy group content of from 0.0005 to 1 mol %, an ethylene content of from 5 to 60 mol %, and a degree of saponification of at least 85 mol % has good melt extrusion stability, drawdown resistance, interlayer adhesion and gas barrier properties, and products made therefrom have good surface smoothness. The saponified ethylene-vinyl acetate resin may be produced by polymerizing a mixture of ethylene and vinyl acetate in the presence of a polymerization initiator having an alkoxy group, thereby producing an ethylene-vinyl acetate copolymer, adding a compound having a molecular weight of at most 1000 and at least one conjugated double bond to the ethylene-vinyl acetate copolymer, then saponifying the ethylene-vinyl acetate copolymer, thereby forming a saponified ethylene-vinyl acetate copolymer.
A resin composition, which comprises a saponified ethylene-vinyl acetate resin and from 0.1 to 3000 ppm, based on the total amount of the saponified ethylene-vinyl acetate resin, of a compound having a molecular weight of at most 1000 and having at least one conjugated double bond, wherein the saponified ethylene vinyl acetate resin has a methoxy group content of from 0.0005 to 1 mol % based on the total moles of monomer units in the resin, an ethylene content of from 5 to 60 mol % based on the total moles of monomer units in the resin, and a degree of saponification of at least 85 mol % based on the number of moles of vinyl acetate monomer units in the resin.
(Canceled).
Dependencies are inferred from the claim text.