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US 2009/0155712 A1Published application
Curable polyester latex made by phase inversion emulsification
AssigneeXerox Corporation
InventorsGuerino G. Sacripante, George Liebermann, Nathan Belliveau, Shigang S. Qiu
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Abstract
A process for preparing a curable polyester based emulsion is provided in embodiments, containing one or more unsaturated polyesters and one or more photoinitiators obtained by a phase inversion process, in which the particle size and particle size distribution is controlled by process parameters, such as solvent, solvent ratio, neutralization ratio of the resin and temperature.
Claims20
A process for preparing a curable polyester based emulsion comprising a resin having a desired particle size, the process comprising:
- selecting at least one of a desired particle size and variability of the desired particle size;
- forming a curable polyester based emulsion by phase inversion;
- and
- controlling a solvent ratio, neutralization ratio, and temperature of the phase inversion according to the transfer functions:
- Y=Z1·{575−[(447.4)(SR)]−[(163.75)(NR)]+[(0.3285)(T)(SR)]};
- and
- S=Z2·{789−[(2.87)(T)]+[(256.9)(SR)]−[(586.4)(NR)]+[(2.27)(T)(NR)]−[(250.8)(SR)(NR)]};
- wherein Y is the desired particle size (in nanometers), S is the variability of the desired particle size (in nanometers), SR is the solvent ratio, NR is the neutralization ratio, T is the temperature (in degrees Kelvin), and Z1 and Z2 independently represent error factors of about 0.8 to about 1.2.
5 more elements
Dependencies are inferred from the claim text.