Patent ID: 6924036

Claim:
A method of treating metal substrata or steels, comprising applying compositions to metal substrata or steels, then sintering the PTFE, wherein the compositions are based on PTFE, homopolymer or modified, comprising 100 parts of the PTFE of component: 1) an aqueous nanodispersion, or latex, of said homopolymer or modified PTFE, having a primary particle diameter from 5 to 100 nm; 2) from 3 to 45 parts by weight of a surfactant or surfactant mixtures; 3) from 0.2 to 20 parts by weight of an organic or inorganic sequestrant capable to give bi- or poly-coordination bands, which forms with metal ions soluble complexes and prevents from forming insoluble salts of said metals; and optionally: 4) from 0 to 60 parts by weight of a solid lubricating compound.