THE SPECTRAL AND MAGNETIC-PROPERTIES OF THE COBALT(II) AND COPPER(II)COMPLEXES OF PHTHALIC-ACID AND A STUDY OF THEIR PERFORMANCE AS COLORING MATERIALS FOR POLY(VINYL CHLORIDE) AND POLYETHYLENE

Complexes of cobalt and copper with phthalic acid have been studied an d found to exist in an octahedral environment. The thermal stability o f the complexes was studied by thermogravimetry. The performance of th e complexes as colouring materials and stabilizing agents for poly(vin yl chloride) and polyethylene has been studied using various tests Suc h as weather resistance, lightfastness, heat stability, resistance to acid and alkali and dispersibility. The complex formed between copper and phthalic acid showed promising properties as a colourant for the p olymers.