Polymer-bonded functional agents

A process for forming an article or product, which comprises blending and kneading at least a master batch obtained by blending and kneading polymer bonded functional agent(s) and polymer(s) and forming said master batch in a sheet form or a pellet form so that said master batch contains the moieties of the functional agent(s) at a concentration of 5 to 20% by weight, as calculated in terms of functional agent(s) moieties,

• wherein said polymer bonded functional agent(s) is/are obtained by the esterification of
• an ethylene-vinyl alcohol copolymer or an ethylene-vinyl alcohol-vinyl acetate terpolymer containing hydroxy group(s) as the reactive group(s) with a functional agent containing acid halide group(s) as the reactive group(s),
• wherein said functional agent(s) comprises at least one functional agent selected from the group consisting of antioxidants, ultraviolet absorbers, light stabilizers, infrared absorbers and antistatic agents, and the polymer-bonded functional agent(s) contain(s) the moieties of the functional agent(s) at a concentration of 22 to 55% by weight, as calculated in terms of functional agent(s) moieties, with a synthetic resin(s), and blending, kneading and forming the resulting product, wherein said article or product contains the moieties of the functional agent(s) at concentration of 0.05 to 1.07% (by weight), as calculated in terms of BP moieties.