Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Process of making developer composition
Patent
1995-07-03
1996-12-10
Goodrow, John
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Process of making developer composition
430108, G03G 9113
Patent
active
055829511
ABSTRACT:
A process for the preparation of carrier particles which comprises mixing a dispersion of water, submicron magnetic particles, and ionic surfactant with a latex comprised of resin particles suspended in an aqueous solution containing a surfactant that is counterionic in charge to said ionic surfactant, and a nonionic surfactant; thereafter heating the resulting mixture below about the latex resin glass transition temperature (Tg) while stirring to form aggregates, followed by increasing the temperature of said mixture to about above the latex resin Tg, and subsequently adding additional counterionic or nonionic surfactant solution to minimize, or avoid any further growth in particle size during heating of the mixture about above the latex resin Tg, and wherein said resin Tg is in the range of from between about 45.degree. C. to about 100.degree. C.
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patent: 5346797 (1994-09-01), Kmiecik-Lawrynowicz et al.
patent: 5403693 (1995-04-01), Patel et al.
patent: 5482812 (1996-01-01), Hopper et al.
Hopper Michael A.
Kmiecik-Lawrynowicz Grazyna E.
Mychajlowskij Walter
Ong Beng S.
Patel Raj D.
Goodrow John
Palazzo E. O.
Xerox Corporation
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