Patent ID: 6936659
Filing Date: 2005-08-30
Classification: A61K,A61Q,C08F,C08G,C08J

Abstract:
1. A master batch obtained by blending and kneading at least one polymer-bonded functional agent and at least one polymer 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 at a concentration of 5 to 20% by weight, as calculated in terms of functional agent moieties, wherein the polymer-bonded functional agent is 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 the functional agent 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 contains the moieties of the functional agent at a concentration of 22 to 55% by weight, as calculated in terms of functional agent moieties.