Masterbatch and production method of oxygen-absorbing molded article

摘要

A masterbatch (M1) comprises a metal compound (b) (0.01 - 5 wt.%) and a reactive thermoplastic resin (c). (b) Contains a group VIII transition metal (preferably manganese, copper or zinc) and is capable of promoting oxidation of a polyamide (a) and (c) has internal bonds or reactive functional groups capable of reacting with (a) on melt-mixing and is resistant to oxidation at room temperature in air by the action of (b). A masterbatch (M1) comprises a metal compound (b) (0.01 - 5 wt.%) and a reactive thermoplastic resin (c). (b) Contains a group VIII transition metal (preferably manganese, copper or zinc) and is capable of promoting oxidation of a polyamide (a) (produced by condensing a diamine having meta-xylene (>=70 mol.%) with a dicarboxylic acid having adipic acid (50 mol.%)). (c) Has internal bonds or reactive functional groups capable of reacting with (a) on melt-mixing and is resistant to oxidation at room temperature in air by the action of (b). An independent claim is included for producing an oxygen-absorbing molded article involving melt-mixing (b) with (c) to obtain (M1) followed by melt-mixing with (a).