There are a number of manufacturers who claim that when their products are mixed at 1-5% concentrations with traditional polymers, the resultant formulation/s become “biodegradable”. Further, these manufacturers maintain that their additives will make polymers “biodegradable” in aerobic environments (such as composting and litter), as well as anaerobic environments (typically found in landfills).
Today, these additives fall into two broad classes, “oxo-biodegradables” and “additives with organic materials”: