IRON PIGMENT OF YELLOW IRON STABLE TO HEAT.

摘要

PIGMENTS OF PURE COLOR IRON OXIDE YELLOW WITH A SILKING INDEX LESS THAN 5 AND A THERMAL RESISTANCE DURING AT LEAST 5 MINUTES GREATER THAN 220 ° C IN POLYETHYLENE, ARE OBTAINED BY OXIDATION OF METAL IRON WITH NITROBENZENE IN THE PRESENT ACID OF COMPOUNDS OF ELECTED ELEMENTS OF THE MAIN GROUPS 3. AND 4. OF THE PERIODIC SYSTEM.