John P Larsen

US Patent:

7910635, Mar 22, 2011

Filed:

Oct 14, 2006

Appl. No.:

11/576738

Inventors:

John H. Larsen - Woodridge IL, US
Joshua M. Rosenheck - Concord OH, US
Robert E. Quinn - Plainfield IL, US

Assignee:

Lubrizol Advanced Materials, Inc. - Cleveland OH

International Classification:

C08C 19/22
C08F 1/02
C08F 1/04
C08F 8/32
C08F 283/00
C08G 8/28
C08G 8/34
C08G 73/02
C08L 61/00
C09D 11/00
C09F 1/00

US Classification:

523160, 523161, 525290, 525374, 525375, 525379, 525380, 525381, 525382, 525540, 527600, 527603, 530210, 530211, 530214, 530221

Abstract:

The specification describes a process for making gelled ink resins which exhibit improved properties such as lower viscosity under low shear and less viscosity decrease with increasing shear. In a preferred embodiment, a rosin-based or hydrocarbon-based resin is mixed with an organic solvent and reacted with a polyamine reactant, such as melamine-formaldehyde resin or hexamethylene diamine, under conditions sufficient to produce a substantially covalently cross-link gelled resin. The resulting gelled resin resists viscosity breakdown under high shear conditions and may be used directly for making ink compositions, obviating the need for further gelation and avoiding the use of conventional organo-metallic gelling agents.