Synthesis of water-based cationic polyacrylate copolymer emulsion by RAFT polymerization and its application as an inkjet printing agent

Abstract

Purpose In this work, the authors used reversible addition-fragmentation transfer (RAFT) polymerization to develop a new cationic acrylate modified epoxy resin emulsion for water-borne inkjet which have the advantages of both polyacrylate and epoxy resin. The emulsion was successfully used in the canvas coating for inkjet printing. This paper aims to contribute to the development of novel cationic emulsions for inkjet printing industry. Design/methodology/approach In this work, the epoxy acrylate was synthesized from RAFT agent and epoxy resin firstly. Cationic macromolecular emulsifier was prepared by RAFT polymerization, using 2,2’-Azobisisobutyronitrile as initiator, 2-(dimethylamino)ethyl methacrylate and styrene as monomer, which was directly used to prepare the emulsion. The influences of the amount of 2-(dimethylamino)ethyl methacrylate on particle size, zeta potential and water contact angle were studied. Finally, the cationic emulsion was used to print images by inkjet printing. Findings The emulsion has the smallest particle size, the highest potential and the highest water contact angle when the DM content is 13 Wt.%. The transmission electron microscopy analysis reveals the latex particles is core-shell sphere with the diameters in the range 120–200 nm. The emulsion was successfully used in the canvas coating for inkjet printing. This work will contribute to the development of novel cationic emulsions for inkjet printing industry. Originality/value The emulsion was successfully used in the canvas coating for inkjet printing. This work will contribute to the development of novel cationic emulsions for inkjet printing industry.

Synthesis of bio‐based modified amphoteric acrylate epoxy emulsion surface sizing agent via RAFT polymerization

“…Such products have adjustable molecular structure, strong affinity with fibers, and good film forming, water resistance and thermoplasticity, so they have become a research hotspot in recent years. [2][3][4] Among them, styrene-acrylic emulsion polymer (SAE) surface sizing agent features the advantages of excellent film forming property, good weather resistance, excellent adhesion and printing adaptability. 5,6 It can not only greatly improve the surface strength, sizing degree, stiffness and smoothness of the paper, but also greatly reduce the phenomenon of cross color, through printing, hair loss and powder loss in color printing.…”

“…With the development of polymer synthesis, polymer surface sizing agents prepared from petroleum by‐products such as styrene and acrylate are more and more widely used in paper industry. Such products have adjustable molecular structure, strong affinity with fibers, and good film forming, water resistance and thermoplasticity, so they have become a research hotspot in recent years 2–4 . Among them, styrene‐acrylic emulsion polymer (SAE) surface sizing agent features the advantages of excellent film forming property, good weather resistance, excellent adhesion and printing adaptability 5,6 .…”