PROPERTIES OF COPPER PHTHALOCYANINE BLUE (CI-PIGMENT-BLUE-15 3) TREATED WITH POLY(ETHYLENE GLYCOL)S/

This paper is concerned with the surface treatment of copper phthalocy anine blue (C.I. Pigment Blue 15:3) by adsorption with poly(ethylene g lycol)s of various molecular weights. The results from the experiments show that the contact angle for water, the flowability and the mean d iameter of treated pigment particles decrease, and that the dispersing stability in aqueous media is increased after treatment. The effect o f surface treatment depends largely on the molecular weights of the po ly(ethylene glycol)s and on the amount of the poly(ethylene glycol)s u sed. (C) 1997 Elsevier Science Ltd.