Thermostable ethylene-carbon monoxide copolymer containing Al-Mg-CO3 or CaO

摘要

Ethylene-carbon monoxide copolymer composition with improved thermal stability wherein the insoluble copolymer content after exposure to a temperature of 265 degrees C. during 5 minutes is at most 40 wt. % and use of the composition for the manufacture of objects, essentially consisting of ethylene-carbon monoxide copolymer. The composition preferably contains an inorganic compound reacting as a base upon contact with water.