1
Sheau Hwa Ma, Howard Matrick, Arthur C Shor, Harry J Spinelli: Aqueous pigmented inks for ink jet printers. E I Du Pont de Nemours and Company, February 4, 1992: US05085698 (430 worldwide citation)

A pigmented ink for ink jet printers which comprises an aqueous carrier medium, and pigment particles dispersed in an AB or BAB block copolymer having a hydrophilic segment and a segment that links to the pigment. The A block and the B block(s) have molecular weights of at least 300. These inks give ...


2
Sheau Hwa Ma, Howard Matrick, Arthur C Shor, Harry J Spinelli, Michele E Shepard, Jerome Hochberg: Aqueous pigmented inks for ink jet printers. E I Du Pont de Nemours and Company, June 22, 1993: US05221334 (173 worldwide citation)

A pigmented ink for ink jet printers which comprises an aqueous carrier medium, pigment particles dispersed in an AB or BAB block copolymer having a hydrophilic segment and a segment that links to the pigment, and an effective amount of a surfactant sufficient to decrease the drying time of the ink. ...


3
Sheau Hwa Ma, Walter R Hertler, Harry J Spineli, Arthur C Shor: Amine-containing block polymers for pigmented ink jet inks. E I Du Pont de Nemours and Company, December 21, 1993: US05272201 (128 worldwide citation)

An aqueous ink jet ink composition having improved dispersion stability comprises an aqueous carrier medium, a pigment having a pH value below 7.0, and an AB block polymer consisting of an A block comprising a hydrophobic polymer having at least one basic amine functional groups, and a B block compr ...


4
John L Stoffel, Arthur C Shor, Harry J Spinelli, Sheau Hwa Ma, Howard Matrick, Mark L Choy, Loren E Johnson: Process for alleviating bleed in printed elements. E I Du Pont de Nemours and Company, September 10, 1996: US05555008 (43 worldwide citation)

A process for alleviating bleed and improving color in printed elements comprises applying an anionic printing liquid and a cationic printing liquid to a substrate adjacent to one another, wherein at least one of the printing liquids contains a polymer and reacting the anionic and cationic printing ...


5
Clyde S Hutchins, Arthur C Shor: Acrylic pigment dispersants made by group transfer polymerization. E I Du Pont de Nemours and Company, April 7, 1987: US04656226 (31 worldwide citation)

A pigment dispersant comprising an AB block copolymer preferably of polymethyl methacrylate and glycidyl methacrylate made by group transfer polymerization, reacted with polar groups, preferably 4-nitrobenzoic acid.