NATURE DEGRADABLE ADDITIVE COMPOSITION OF POLYOLEFIN THERMOPLASTIC POLYMERS

摘要

An additive composition for biodegradation of a polyolefin-based thermoplastic polymer is provided to ensure stability during the service life and decomposition into non-harmful compounds under natural environment after the use. An additive composition for biodegradation of a polyolefin-based thermoplastic polymer comprises, based on 100 wt% of the total composition: (a) 10-30 wt% of a conventional thermoplastic polymer; (b) 0.3-30 wt% of a biodegradable material comprising at least one material selected from polylactic acid, polycaprolactone, aliphatic polyester, polysaccharides and wax; (c) 0.1-5 wt% of an oxidation accelerator reacting with C-C bonds of the thermoplastic polymer to generate peroxide or hydroperoxide, and comprising at least one material selected from unsaturated fatty acids, liquid edible oil, organic acids and saccharide; (d) 0.1-3 wt% of a catalyst for the oxidation accelerator, comprising at least one material selected from iron stearate and copper stearate; (e) 20-70 wt% of an oxidation accelerating aid selected from the group consisting of clay minerals, calcium carbonate, talc, illite and zeolite; and (f) 0.5-15 wt% of a hydrophilic group-containing polymer comprising at least one of polyvinyl alcohol, polyacrylic acid and polyethylene acrylic acid.