The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 05, 2023
Filed:
May. 15, 2019
M. Technique Co., Ltd., Izumi, JP;
Masakazu Enomura, Izumi, JP;
Kazutaka Takeda, Izumi, JP;
M. TECHNIQUE CO., LTD., Izumi, JP;
Abstract
The present application provides black perylene pigment microparticles having an average circularity of 0.8 or more which are amorphous; and a method of producing the black perylene pigment microparticles, which comprises a step of mixing a pigment solution in which a black perylene pigment is dissolved and a precipitation solvent for precipitating black perylene pigment microparticles from the pigment solution to form black perylene pigment microparticles, wherein at least one of the pigment solution and the precipitation solvent independently includes a salt of an alkaline earth metal and/or a particle growth inhibitor. The present invention can provide black perylene pigment microparticles having good dispersibility, high concealability and light-shielding property and controlled hue and chroma, and a method of easily producing the same, and the like.