Patent ID: 7378463
Filing Date: 2008-05-27
Classification: C08L,C09K

Abstract:
1. An intumescent fire retardant system for use in polymeric moldings, comprising, on the basis of 100 parts by weight blended mixture of a polymer component comprising: 20-45 parts of a polymeric binder comprising high density polyethylene having a density in the range of 0.940-0.970 g/cm 5-25 parts of a nitrogenous gas-generating agent selected from the group consisting of amines, ureas, guanidines, guanamines, s-triazines, amino acids, salts thereof, and mixtures thereof, wherein the salts are selected from the group consisting of phosphates, phosphonates, phosphinates, borates, cyanurates, sulfates and mixtures thereof; 10-35 parts of a water vapor-generating agent; 1-5 parts of an antioxidant; and 0-15 parts of a reinforcing agent, wherein the system is essentially halogen-free.