Abstract: An inkjet ink binder including an aqueous dispersion of polymer particles, the polymer including as polymerized units from 1 to 20 wt.% ethylenically unsaturated hydrophilic monomer, based on polymer weight, the polymer having a weight average molecular weight of from 1000 to 50,000, and the polymer having a glass transition temperature (Tg) in the range of from ?40° C. to 120° C., is provided. An inkjet ink including the inkjet ink binder is also provided.

Abstract: Aqueous inkjet inks having metal nanoparticles for printing of conductive patterns or for other reasons can be printed employing heat energy within the range of current printers. For optimum printing the energy delivered would be about 2.9×109 Joules/m3 or larger of volume of the heater stack, preferably not much larger so as to conserve energy. In embodiments the mole fraction of water in the ink would be greater than 0.9 computed with respect to only the liquid components of the ink and the ink would be heated by contact with the surface a heater heated to 1.5×1015 or more watts/m3 of volume of the heater stack. Embodiments of a silver ink will have greater than 12% silver and up to 27% silver by weight of the weight of the ink; the ink may have a viscosity of less than 3 Pa-s at 22 degrees C., preferably is less than 2.7 mPa-s; the ink may have a mole fraction of water greater than 0.87, preferably greater than 0.9, this mole fraction being computed with respect to all of the components of the ink.

Abstract: An inkjet ink composition having a binder including an aqueous dispersion of polymer particles, the polymer including, as polymerized units, (a) from 0 to 1 wt. % monoethylenically unsaturated acid monomer, based on polymer weight; and (b) monomer of the formula CH2?C(R1)-CON(R2)(R3) wherein R1=H, CH3 or C2H5 and R2 and R3 are independently selected from C1-C6 saturated alkyl and cycloalkyl groups; and wherein the total of (a) and (b) is at least 0.1 wt % monomer based on the polymer weight. The binder may be a copolymer of ethyl acrylate and acrylamide. An inkjet ink composition including the inkjet ink binder, a colorant, and a liquid medium is also provided.

Abstract: An inkjet ink composition having a binder including an aqueous dispersion of polymer particles, the polymer comprising as polymerized units from 3 to 20 wt. % monoethylenically unsaturated acid monomer, based on polymer weight, and having a glass transition temperature (Tg) in the range of from ?40° C. to 120° C., and the polymer particles having a volume average particle diameter as measured by dynamic light scattering of at least 35 nanometers greater than the weight average particle diameter as measured by capillary hydrodynamic fractionation is provided. An inkjet ink composition including the inkjet ink binder is also provided.

Abstract: Hydrolase enzymes are sensitively determined using novel substituted FAD substrates. The substituted FAD substrates are hydrolysed to FAD by the enzyme to be detected. The FAD is then combined with an apoenzyme to form a holoenzyme which is used to initiate a reaction that leads to a detectable product. When the hydrolase to be detected is phosphatase, the novel substrate is a phosphorylated derivative of FAD. A suitable apoenzyme is apo-glucose oxidase which provides exceptional sensitivity. Apo-D-amino acid oxidase, which is suitable for use in a "single pot" assay system, can also be used.