INKJET INK

PROBLEM TO BE SOLVED: To provide an inkjet ink which contains a metallic pigment excellent in brightness, and also in water proofness, chemical resistance, and weatherproofness, with little color change or color fading under high temperature and high pressure, and durable at outdoor use for a long period of time, and which is insusceptible to electric charge from a pressure element of an inkjet head.SOLUTION: The inkjet ink is provided which includes a nonconductive metal pigment having an average particle size of 0.4 to less than 0.95 μm, a resin, and a solvent, and in which the surface of the nonconductive metal pigment is coated with an alkoxide containing an organoalkoxysilane having a structure represented by formula (2a) and formula (2b) and a coating film has a crosslinked structure. R-Si-(OR)... (2a) (Ris a monovalent group having a (meth)acryl group, Ris a monovalent C1-4 alkyl group). R-Si-(OR)... (2b) (Ris a glycidoxy group, or a monovalent group having a C5-6 epoxycycloalkyl group functional group, and Ris a monovalent C1-4 alkyl group).SELECTED DRAWING: None 【課題】輝度に優れ、耐水性、耐薬品性、耐候性等にも優れ、高温・高圧下においても変色・退色が少なく、長期の屋外使用にも耐えうる金属顔料を配合した、インクジェットヘッドの圧力素子の電荷に影響を受けないインクジェット用インクの提供。【解決手段】平均粒径０．４〜０．９５μｍ未満である非導電性金属顔料と、樹脂と、溶媒を含み、前記非導電性金属顔料の表面は、式（２a）及び式（２b）で示される構造を有するオルガノアルコキシシランを含むアルコキシドにより被覆され、且つ被膜が架橋構造しているインクジェット用インク。Ｒ１−Ｓｉ−（ＯＲ３）３・・・・・（２ａ）（Ｒ１は（メタ）アクリル基を有する１価の基；Ｒ３は１価のＣ１〜４のアルキル基）Ｒ５−Ｓｉ−（ＯＲ６）３・・・・・（２ｂ）（Ｒ５はグリシドキシ基、Ｃ５〜６のエポキシシクロアルキル基官能基を有する１価の基；Ｒ６は１価のＣ１〜４のアルキル基）【選択図】なし