Self-dispersing particles and methods for making and using the same

US9221986B2 · kind B2 · utility

Assignee

• Sensient Colors LLC · US

Inventors

• Puthalath K. Sujeeth · Maryland Heights, US
• John P. Kane · Tafton, US
• Daniel A. Ouellette · Saint Peters, US
• Mark Ulrich · Florissant, US

Key dates

• Filing date: Apr 7, 2010
• Grant date: Dec 29, 2015
• Expiry date: Apr 10, 2031

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01P2006/64
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

A method of modifying a particle that includes reacting a reactive compound having an X—[Y]n reactive group with a secondary compound N—S-ZM to form a substituted reactive intermediate [Y]a—X—(N—S-ZM)b, and reacting the particle with the substituted reactive intermediate [Y]a—X—(N—S-ZM)b to attach the substituted reactive intermediate to the surface of the particle to form a surface modified particle. The particle may comprise at least one of a dye particle, an inorganic pigment particle, an additive, or a combination thereof. X may be a sulfonyl, phosphoryl, or 1,3,5-triazinyl group. Y may be a halogen leaving group. N may be a nucleophilic group. S may be an organic group. ZM may be an ionizable end group. Also, n is an integer between 1 and 3, b is an integer between 1 and 3, and a=n−b. When n is equal to or greater than b, and wherein if b is 2 or 3, each N—S-ZM can be the same or different.