Self-dispersed pigments and methods for making and using the same

US8118924B2 · 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
• Vincent Shing · Arnold, US
• Michael Bogomolny · San Diego, US

Key dates

• Filing date: May 17, 2011
• Grant date: Feb 21, 2012
• Expiry date: May 17, 2031

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01P2006/60
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A method of modifying a pigment 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. A pigment is reacted with the substituted reactive intermediate [Y]a—X—(N—S—ZM)b to attach the substituted reactive intermediate to the surface of the pigment to form a surface modified pigment. X may be a sulfonyl, phosphoryl, or 1,3,5-triazinyl group, Y may be a halogen leaving group, N may be a basic nucleophilic group, S may be an organic group, and 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 if b is 2 or 3, each. N—S—ZM can be the same or different.