Preparation and Characterization of Styrene-Acrylic Resin Encapsulated C.I. Pigment Blue 15:3

By : Yao Zang , Ming-Quan Ye , Ai-Jun Han , Shu-Ting Zhang

Page No: 405-420

Abstract
To get high-efficiency encapsulation of C.I. Pigment Blue 15:3(PB15:3), comparative experiments of miniemulsion polymerization and in-situ polymerization were conducted. When the weight ratio of pigment to monomer is below 4:100, the pigment can be dissolved in co-monomers and encapsulated particles with clear core-shell structure can be produced by miniemulsion polymerization. However, miniemulsion polymerization is inapplicable when the weight ratio of pigment to monomer is above 4:100, which attributes to the limited solubility of pigment in co-monomers. In-situ polymerization was employed to prepare styrene-acrylic resin encapsulated C.I. Pigment Blue 15:3 in weight ratio of pigment to monomer 10:100, which can be used for laser-printing color toner. The dosage of compound emulsifiers plays an important role in preparing full-encapsulated and well-dispersed composite particles. The transmission electron microscopy(TEM), fourier transform infrared spectrometer (FT-IR), and thermogravimetric analyses (TGA) all confirmed successful encapsulation of PB15:3 into styrene-acrylic resin. The encapsulation of PB15:3 does not affect its tinctorial strength but protect it from UV irradiation. The nature and structure of PB15:3 does not change after encapsulation.

Authors :
Yao Zang, Ming-Quan Ye, Ai-Jun Han and Shu-Ting Zhang: School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China