Process for coating carrier particles

Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Process of making developer composition

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427221, G03G 9113

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active

052233693

ABSTRACT:
Small amounts of a latent solvent are added during the initial powder impaction of the powder coating process of toner carrier particles so as to avoid excessive heating. The temperature of the mixture is raised until the solvent softens the polymer, thereby making the coating uniform. Solvent is later removed to obtain the dry coated carrier. The process is especially useful when using coating materials which have a thermal processing narrow temperature range.

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"Polyvinyl Fluoride", (IP 901160) J. J. Dietrich et al., Paint and Varnish Production, Nov. 1966, pp. 75-89.
"Optical Properties Spectral Transmission", E. I. duPont de Nemours & Co. (Inc.), Polymer Products Department, Tedlar PVF Film Technical Bulletin.
"Solvents for Kynar", Pennwalt Chemicals Equipment Health Products, Technical Data, Jan. 31, 1974.

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