Water-based pigmented inks
AssigneeMinnesota Mining and Manufacturing Company
InventorsLarry R. Krepski, Richard J. Kuo, Prabhakara S. Rao, Terrance P. Smith
Life of this patent
Estimating the term…
Abstract
Water-based pigmented inks are disclosed. Such inks are formed from water-based dispersions of pigment particles having novel dispersants therein. The dispersions are formed from the reaction product of an alkenyl azlactone with an N-substituted amino acid compound. Subsequent to the reaction, the reaction product is ring-opened using an amine and, optionally, hydrolyzed. The resulting inks are well-suited for use in ink jet and other printing applications.
Claims32
A water-based pigmented ink which comprises an suspension of:
- a) pigment particles, and
- b) a dispersant which comprises a reaction product of an alkenyl azlactone with an N-substituted amino acid compound which, subsequent to reaction, has been ring-opened using an amine.
A water-based pigmented ink which comprises, a suspension of:
- a) pigment particles, and
- b) a dispersant made by a process which comprises
- i) reacting an alkenyl azlactone with an N-substituted amino acid compound to form a first reaction product, and
- ii) ring-opening the first reaction product using an amine, to thereby form a second reaction product.
Dependencies are inferred from the claim text.