CARBON BLACK-CONTAINING COMPOSITE PARTICLES AND METHOD FOR PRODUCING CARBON BLACK-CONTAINING COMPOSITE PARTICLES

摘要

Carbon black-containing composite particles of the present invention each include a silicon oxide and carbon black particles dispersed inside the silicon oxide. When a coating film containing the carbon black-containing composite particles dispersed in a transparent matrix, having a concentration of the carbon black particles of 1 mass%, and having a thickness of 25 µm to 40 µm is formed on a hiding-chart specified in JIS (Japanese Industrial Standards) K 5600-4-1: 1999, a difference L_W* - L_B* obtained by subtracting lightness L_B* of the coating film formed on a black part of the hiding-chart from lightness L_W* of the coating film formed on a white part of the hiding-chart is 30 or less. Thus carbon black-containing composite particles advantageous in exhibiting a good hiding property and reducing an undertone can be provided.