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:
May. 21, 2013
Filed:
May. 12, 2010
Takeshi Suwa, Funabashi, JP;
Hisato Hayashi, Funabashi, JP;
Masaaki Ozawa, Funabashi, JP;
Nissan Chemical Industries, Ltd., Tokyo, JP;
Abstract
There is provided to a method for efficiently producing phosphonic acid metal salt fine particles with an average particle diameter of 0.5 μm or less with high efficiency. A method for producing phosphonic acid metal salt fine particles, comprising: a) causing a reaction of a phosphonic acid compound of Formula (I): (where Rand Rare each independently a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, or an alkoxycarbonyl group having 1 to 10 carbon atoms) with a base in an aqueous medium to adjust a pH range of the reaction system to be neutral to basic; b) causing a reaction of the product obtained in a) with a metal salt to precipitate a phosphonic acid metal salt from the aqueous medium; c) removing water from the phosphonic acid metal salt precipitated in b); and d) heating and drying the phosphonic acid metal salt from which water is removed in c).