Graft copolymer for use as protective colloid in paper coating material, comprises a protein-derived polymer grafted with unsaturated amide or amine and crosslinked with polyfunctional epoxide

摘要

Graft copolymers (I) derived from proteins, grafted with ethylenically unsaturated monomers containing amide and/or amino groups and partly crosslinked with a polyfunctional epoxide and/or a polyfunctional aziridine and/or trichloro-triazine and/or dichloride-hydroxy-triazine. An Independent claim is also included for coating materials for printable paper in the form of aqueous dispersions with a solids content of 50-80 wt%, containing pigments, auxiliary materials and (I).