| abstract |
An intumescent fire retardant system for making polymeric moldings that is halogen-free and provides fire shielding, thermal shielding and a low heat release rate. The intumescent fire retardant system comprises, on the basis of 100 parts by weight blended mixture, 20-45 parts of a polymeric binder based on high density polyethylene, and 5-25 parts of a nitrogenous gasgenerating agent, 10-30 parts of a water vapor-generating agent, 1-5 parts of an antioxidant, and optionally 1-15 parts of an a-olefin-containing copolymer, such as linear low density polyethylene, and 1-15 parts of a reinforcing agent. The fire retardant system is essentially halogen-free. |