The silicone-acrylic block copolymers were prepared by free radical copolymerization, in which we used polydimethylsiloxane containing azo groups as a macromolecular initiator and acrylic monomers including functional monomers. The copolymer solutions were coated on substrates by various application methods, subsequently cured with either cross-linking agents or UV light. Advancing (A) and receding (R) contact angles of the resulting films were measured in various inks. The films were hard enough for a nozzle face, exhibited over 80° of A and 60° of R in an ink, which were superior to those of silicone or fluorinated coating films. The ink-resistance of the films was evaluated by changes in A and R before and after soaking the films into inks at 60°C for 4 weeks. The durability of the films were outstanding. The excellent properties were found to be caused by microdomain structure and to be influenced by domain spacing rather than silicone content.
Masatoshi Ohata, Shigeru Mikami, Hiroharu Osugi, "Ink-Repellent Coatings Composed of Silicone-Acrylic Block Copolymer for Ink Jet Printer" in Proc. IS&T Int'l Conf. on Digital Printing Technologies (NIP15), 1999, pp 48 - 51, https://doi.org/10.2352/ISSN.2169-4451.1999.15.1.art00013_1