Flame-retarding composition and process for the preparation thereof

Abstract

Flame-retarding composition comprising 10-90 wt. % melem, 0.01-30 wt. % melam, 0.01-15 wt. % melamine, 0.1-65 wt. % higher condensation products of melamine and/or melem, the volatiles content being lower than 3 wt. % and the sum of the individual components amounting to 100 wt. %. Also a process for the preparation of a flame-retarding composition comprising 10-90 wt. % melem, 0.01-30 wt. % melam, 0.01-15 wt. % melamine and 0.1-65 wt. % higher condensation products of melamine and/or melem, the volatiles content being lower than 3 wt. %, by heating melamine-containing starting product for more than 0.1 second, for example by passing it through a heating zone, at a temperature of 350-800° C. and a pressure of between 1 KPa and 50 Mpa. The invention also relates to polymer compositions containing the flame-retarding composition.

Dependencies are inferred from the claim text.