Are superior in smoke consuming Characteristic the fire retardant constituent and its manufacturing method null for the chlorine content polymer

摘要

PURPOSE: To produce the subject composition which exhibits excellent flame retarding properties, especially prevention of smoking, while maintaining excellent heat resistance. ;CONSTITUTION: Porous carrier grains each comprising a silicate retaining in its pores an organic compounding agent having masking and chelating functions for zinc chloride are mixed under grinding conditions with a zinc compound particulate having a ZnO content of at least 45wt.% and a number-average primary particle size of from 0.1 to 5μm as measured by electron microscopy in proportions such that the amount of the zinc compound particulate is 3 to 50wt.% based on the total, thereby producing the objective composition characterized in that the porous carrier grains are present in the form of core grains, and that most of the zinc compound particulate is present in the form of a shell layer covering the core grains. Thus, the rapid resin degradation in the processing of a chlorinated polymer and the emission of smoke in combustion, which are drawbacks of the zinc compound, can very effectively be inhibited.;COPYRIGHT: (C)1993,JPO&Japio