公开(公告)号：EP4206250A1

公开(公告)日：2023-07-05

申请号：EP21861253.9

申请日：2021-08-12

申请人： DAINICHISEIKA COLOR & CHEMICALS MFG. CO., LTD.

发明人： SHIMANAKA, Hiroyuki ,  KAMABAYASHI, Jun ,  TANAKA, Akifumi ,  OKUBO, Toshie ,  TIAN, Lu ,  MURAKAMI, Yoshikazu ,  YOSHIKAWA, Sachio

IPC分类号： C08F293/00 ,  B41J2/01 ,  C09D11/322 ,  B41M5/00

摘要： The present invention provides an A-B block copolymer that enables preparation of a polymer emulsion useful as a binder component for an aqueous inkjet ink that is excellent in inkjet printability and is capable of forming a printed film excellent in durability, such as adhesiveness and rub resistance, on a substrate to be printed, such as a polyolefin-based plastic film. The block copolymer is an A-B block copolymer satisfying the following requirements (1-1) to (1-3). (1-1) Containing 90% by mass or more of a constituent unit derived from a methacrylate-based monomer or the like. (1-2) The chain A has a constituent unit (A-i) derived from methyl methacrylate or the like and a constituent unit (A-ii) derived from 2-ethylhexyl methacrylate or the like. (1-3) The chain B has a constituent unit (B) derived from methacrylic acid, a constituent unit (B-i) derived from methyl methacrylate or the like, and a constituent unit (B-ii) derived from 2-ethylhexyl methacrylate or the like.