Pigment composition for oil-based lithographic printing ink

Patent name Pigment composition for oil-base lithographic printing ink Patent Applicant Xiba Special Chemicals Holdings Co., Ltd. Principal Applicant Address Basel Inventor A.M.Mar; D.A.Williamson; E.J. Anderson Application (Patent) No. 03825239.5 Date of Application 2003.09.18 Approval Date Approval Notice No. 1685023 Audit Notice Date 2005.10.19 Instruction CD-ROM D0542 Main Classification No. C09D11/02 Classification No. C09D11/02; C09B67/00 Original Application No. Priority Item 2002.9.26 EP 02405831.5 Abstract provides a pigment composition suitable for use in oil-base lithographic inks, which in addition to organic pigments also contain polyalkylenimine-polyesters as hyperdispersants. Addition products, quaternary ammonium pigment derivatives as synergists, aliphatic/aromatic fractions as solvents and vegetable oils and optionally rosin or modified rosin. The printing inks prepared from these pigment compositions clearly exhibited improved rheological properties. Sovereign matters 1. A pigment composition comprising: (a) 60-90% organic pigment, (b) 1-10% hyperdispersant, (c) 1-10% synergism. Agent, (d) 1-10% solvent, and (e) 0-40% rosin or modified rosin. International Application PCT/EP2003/010394 2003.9.18 International Publication WO2004/029167 English 2004.4.8 Entering Country Date Patent Agency China Patent Agent (Hong Kong) Co., Ltd. Agency Address Agent Zhao Sulin