Electroscopic carrier particles having a carboxylic acid surface

Details Electroscopic carrier particles having a carboxylic acid surface Electroscopic carrier particles having a carboxylic acid surface

1978-06-28

1981-01-27

McCamish, Marion

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Particulate matter

428407, G03G 1308, G03G 1309

Patent

active

042475970

ABSTRACT:
Disclosed is a treatment of electroscopic carrier particles with a solution of non-halogenated carboxylic acids. Preferably, the carboxylic acid solution is first passed through a dry agent to assure its anhydrous nature. The carrier particles are added to and agitated within the solution a sufficient period to assume complete wetting of the particles. After decanting and filtering, the carrier particles are dried. Carrier particles treated in this manner are less susceptible to oxidation and have particular utility for use in development powders for magnetic brush development units of electrophotography copier equipment.

REFERENCES:
patent: 3922381 (1975-11-01), Datta
patent: 3989648 (1976-11-01), Lenhard
patent: 4063000 (1977-12-01), Aonuma
patent: 4071655 (1978-01-01), Brana
patent: 4073980 (1978-02-01), Westdale
patent: 4113641 (1978-09-01), Brana

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