| 摘要 |
PROBLEM TO BE SOLVED: To solve disadvantages that a conventional color masterbatch by a flushing method, which is often used because of the easiness in obtaining a product rich in pigment dispersibility with a natural resin, is produced by using a large melting and kneading apparatus and operation thereof for the production is also not easy, to produce a pigment-dispersing resin only by agitating a polyolefin resin at a peripheral speed of a constant laminar flow, and to obtain a color masterbatch which is not inferior to a conventional color masterbatch by blending a pigment into the pigment-dispersing resin. SOLUTION: The pigment-dispersing resin having an IR-spectrum peak at 1,580-1,680 cm<SP>-1</SP>is obtained by subjecting a polyolefin resin to laminar-flow agitation treatment at a softening temperature of the polyolefin resin or below by using a high-speed mixer in which the gap between the tip of an agitation blade and the inner-wall surface of an agitation tank is 3-30 mm and the agitation blade rotates at a tip speed of 20-60 m/sec. The color masterbatch is obtained by using the pigment-dispersing resin. COPYRIGHT: (C)2006,JPO&NCIPI |
