Process for making self-extinguishing, by means of red phosphorus, synthetic thermoplastic materials and products so obtained

摘要

A process for making self-extinguishing thermoplastic materials based on synthetic polymeric substances by incorporation of red phosphorus into said materials, which comprises the following steps: PP forming a "concentrate" consisting of 30-70% of a "mother polymeric substance" and of 70-30% of red phosphorus powder previously encapsulated in a modified cationized melamine resin;PP incorporating said concentrate into a thermoplastic material to be made self- extinguishing and consisting of at least 50% of a polymeric substance similar to or consistent with the substance comprised in said concentrate, the amount of the above-mentioned concentrate being quantitatively so proportioned that the final self-extinguishing thermoplastic material contains 1-15% by weight of encapsulated red phosphorus.