Patent ID: 8409479

Claim:
A ceramifying composition forming a fire resistant ceramic under fire conditions, the composition comprising: (i) at least 10% by weight based on the total weight of the composition of silicate mineral filler; (ii) from 8% to 40% by weight based on the total weight of the composition of at least one inorganic phosphate that forms a liquid phase at a temperature of no more than 800° C. selected from ammonium phosphate, ammonium polyphosphate and ammonium pyrophosphate; (iii) at least 15% by weight based on the total weight of the composition of a polymer base composition comprising at least 50% by weight of an organic polymer; wherein the composition comprises less than 1% by weight of melamine and pentaerythritol, based on the total weight of the composition; and wherein said composition forms a self-supporting ceramic residue on exposure to an elevated temperature of 1000° C. for 30 minutes, which the residue comprises at least 40% by weight of the composition before pyrolysing.