MATTING AGENT FOR PRINTING INK, PRINTING INK COMPOSITION COMPRISING THE SAME AND ITS USE

摘要

PROBLEM TO BE SOLVED: To provide a matting agent for a printing ink capable of exhibiting a matte feeling equal or superior to a matting agent using silica or the like while maintaining excellency in ink flowability and dispersibility. SOLUTION: The matting agent for a printing ink comprises polyvinyl chloride resin particles having a particle size ranging from 0.01 to 50μm and an average particle size of 0.1-40μm, and 100 pts.wt. of a dried powder of the particles are admixed with 60 pts.wt. of 2,2,4-trimethyl-1,3-pentanediol diisobutyrate and kneaded by a dissolver type mixer at 800 rpm at 25 deg.C for 3 min to give an average resin particle size of 0.1-70μm and a maximum particle size of less than 150μm. The subject printing ink composition comprises 3-60 pts.wt. of the matting agent.